CN113472470B - Cell search method under multi-operator, electronic device, and computer-readable storage medium - Google Patents

Abstract

A cell search method and electronic device under multiple operators relate to the field of communication technologies, and solve the problem of a long time for UE to perform cell search in the prior art. The method includes: when the UE meets a preset condition, the UE performs a network search operation; wherein, the UE saves the information of the registered public land mobile network RPLMN, and the preset condition includes power-on or cell reselection; the network search operation includes : When the HPLMN of the UE is a predefined PLMN, the UE skips the process of searching under the RPLMN, and searches the HPLMN; when the frequency point is searched under the HPLMN, the UE sends a registration message to the network device corresponding to the frequency point. The information is used to request access to the network device; wherein, a region or country corresponding to the predefined PLMN has a co-construction network, and the network device providing the co-construction network corresponds to multiple PLMNs.

Description

Cell search method and electronic device and computer-readable storage medium under a kind of multi-operator

technical field

The present application relates to the field of communication technologies, and in particular, to a cell search method and electronic device under multiple operators.

Background technique

After the User Equipment (UE) is powered on, it needs to perform a cell search on the selected Public Land Mobile Network (PLMN). After the UE finds an available cell, it accesses the cell. After successful access, it can access the cell. The cell initiates registration. After successfully registering with the cell, the UE can enjoy network services in the cell. Therefore, the shorter the time period for the UE to perform the cell search, the better the user experience.

At present, the duration used by the UE to perform the cell search mainly depends on the cell search strategy of the UE. The cell search strategy is mainly to perform cell search under which PLMN first, and then under which PLMN to perform cell search. An existing cell search strategy is that, after the UE is powered on, in the case where the network code of the registered PLMN (Registered PLMN, RPLMN) is stored in the card file of the UE's subscriber identity module (Subscriber Identity Module, SIM) card, It is necessary to search under the RPLMN (such as the network of operator A) first. If no cell is searched under the RPLMN, the search can be performed in sequence according to the priority order of the currently searched PLMN (excluding the RPLMN). If the currently searched PLMN includes a local public land mobile network (Home PLMN, HPLMN, such as operator B's network), and the HPLMN has the highest priority, the UE switches to continue cell search under the HPLMN. After that, if no cell is searched under the HPLMN, the UE continues to search under other PLMNs according to the priority order. This results in a longer time for the UE to perform cell search.

SUMMARY OF THE INVENTION

In view of this, the embodiments of the present application provide a cell search method and electronic device under multiple operators, which can shorten the time period for the UE to perform cell search.

In a first aspect, an embodiment of the present application provides a cell search method under multiple operators, and the method can be applied to a user equipment UE. When the UE meets the preset conditions, the UE performs a network search operation; wherein, the UE saves the information of the registered public land mobile network RPLMN, and the preset conditions include power-on or cell reselection; the network search operation includes: in the UE's When the HPLMN is a predefined PLMN, the UE skips the process of searching under the RPLMN, and searches the HPLMN; in the case where the frequency point is searched under the HPLMN, the UE sends the registration information to the network device corresponding to the frequency point for Request to access network equipment; wherein, the region or country corresponding to the predefined PLMN has a co-construction network, and the network equipment providing the co-construction network corresponds to multiple PLMNs.

In the above embodiment, the cell search method under the multi-operator provided by the embodiment of the present application is in the case that the UE satisfies the preset condition, and the UE stores the information of the RPLMN. At this time, when the HPLMN of the UE is a predefined PLMN, the UE skips the process of searching under the RPLMN, and searches the HPLMN; when the frequency point is searched under the HPLMN, the UE sends the frequency point to the network device corresponding to the point. The registration information is sent to request access to the network device; thus, the time for the UE to search for the RPLMN can be saved, and the time for the UE to search for a cell can be shortened.

In addition, when the PLMN of the cell where the UE is powered off is different from the PLMN of the cell where the UE is powered on, when the UE is powered on and searches for the RPLMN, the frequency corresponding to the RPLMN cannot be searched. However, in the cell search method under the multi-operator provided by the present application, in the case that the UE satisfies the preset conditions, and the UE stores the information of the RPLMN. At this time, when the HPLMN of the UE is a predefined PLMN, the UE skips the process of searching under the RPLMN and searches the HPLMN, thereby saving the time for the UE to search for the RPLMN and shortening the time used by the UE for cell search. duration.

In a possible design of the first aspect, when the HPLMN of the UE is a predefined PLMN, the UE skips the process of searching under the RPLMN, and before searching the HPLMN, the method further includes: the UE obtains the UE location information, and determine the country where the UE is located as a predefined country according to the location information.

In the above embodiment, there are differences in the networks deployed by operators in different regions or countries. Therefore, in the cell search method under the multi-operator provided by the embodiments of the present application, the UE needs to obtain location information before searching the HPLMN, and determines whether the country where the UE is located is a predefined country according to the location information. If yes, skip the process of searching for the RPLMN and directly search for the HPLMN, thereby saving the time for the UE to search for the RPLMN, shortening the time for the UE to search for a cell, and ensuring user experience.

In another possible design manner of the first aspect, the first operator to which the subscriber identity module SIM card of the UE belongs and the second operator jointly deploy network equipment, and the PLMN of the second operator is the EPLMN of the UE; the The method further includes: when no frequency point is searched under the HPLMN, and the frequency point of the EPLMN is searched, the UE sends registration information to a network device corresponding to the frequency point of the EPLMN.

In the above embodiment, the cell search method under the multi-operator provided by the embodiment of the present application, because the first operator to which the SIM card of the UE belongs and the second operator jointly deploy network equipment, and the second operator's PLMN is the EPLMN of the UE. At this time, in the case that no frequency point is searched under the HPLMN, and the frequency point of the EPLMN is searched, the UE sends registration information to the network device corresponding to the frequency point of the EPLMN. Instead of finding no frequency point under HPLMN, even if the frequency point of EPLMN is searched, the UE cannot immediately send registration information to the network device corresponding to the frequency point. When searching, the UE can send registration information to the network device corresponding to the frequency point only after the frequency point is searched under the EPLMN. Therefore, the UE can send the registration information to the network device more quickly, shorten the time for the UE to perform cell search, and ensure the user's experience.

In another possible design manner of the first aspect, searching under the HPLMN specifically includes: the UE searches for the historical dwell frequency points of the first standard of the HPLMN; In the case that no frequency point is searched under the click, the UE searches for the historical resident frequency point of the second standard of the HPLMN, and the network equipment of the second standard allows the UE to access in a roaming mode, and the first standard is different from the second standard; In the case where no frequency is searched under the historical resident frequency of the second standard of HPLMN, and no frequency of EPLMN is searched, the UE searches the full frequency band of the first standard of HPLMN; in the first standard of HPLMN In the case where no frequency point is searched in the full frequency band of the HPLMN, the UE searches for the full frequency band of the second standard of the HPLMN.

In the above embodiment, the cell search method under the multi-operator provided by the embodiment of the present application, because the first operator to which the SIM card of the UE belongs and the second operator jointly deploy network equipment, and the second operator's PLMN It is the EPLMN of the UE, and the network equipment of the second standard allows the UE to access in a roaming manner. Therefore, while searching for the historical resident frequency points of the second system of the HPLMN, it can also be determined whether the frequency points of the EPLMN are searched. Instead of finding no frequency point under HPLMN, even if the frequency point of EPLMN is searched, the UE cannot immediately send registration information to the network device corresponding to the frequency point. When searching, the UE can send registration information to the network device corresponding to the frequency point only after the frequency point is searched under the EPLMN. Therefore, the UE can send the registration information to the network device more quickly, shorten the time for the UE to perform cell search, and ensure the user's experience.

In another possible design manner of the first aspect, when no frequency is searched under the HPLMN, and the frequency of the EPLMN is searched, the UE sends registration information to the network device corresponding to the frequency of the EPLMN, which specifically includes : In the case where no frequency is searched under the historical resident frequency of the second system of the HPLMN, and the frequency of the EPLMN is searched, the UE sends the registration information to the network device corresponding to the frequency of the EPLMN; In the case where no frequency point is searched in the full frequency band of the second standard, and the frequency point of the EPLMN is searched, the UE sends registration information to the network device corresponding to the frequency point of the EPLMN.

In the above embodiment, the cell search method under the multi-operator provided by the embodiment of the present application, because the first operator to which the SIM card of the UE belongs and the second operator jointly deploy network equipment, and the second operator's PLMN It is the EPLMN of the UE, and the network equipment of the second standard allows the UE to access in a roaming manner. Therefore, while searching for the historical resident frequency points of the second system of the HPLMN, it can also be determined whether the frequency points of the EPLMN are searched. Therefore, when no frequency is searched under the historical resident frequency of the second standard of the HPLMN, and the frequency of the EPLMN is searched, the UE sends registration information to the network device corresponding to the frequency of the EPLMN. Or, when no frequency is searched in the full frequency band of the second standard of the HPLMN, and the frequency of the EPLMN is searched, the UE sends registration information to the network device corresponding to the frequency of the EPLMN. It is not that the frequency point is not searched under the determination of HPLMN. Even if the frequency point of the EPLMN is searched, the UE cannot immediately send the registration information to the network device corresponding to the frequency point. When searching, the UE can send registration information to the network device corresponding to the frequency point only after the frequency point is searched under the EPLMN. Therefore, the UE can send the registration information to the network device more quickly, shorten the time for the UE to perform cell search, and ensure the user's experience.

In another possible design manner of the first aspect, the first operator and the second operator to which the subscriber identity module SIM card used by the UE belongs to jointly deploy network equipment whose network standard is the first standard, and the second operator The PLMN of the UE is the FPLMN of the UE under the first standard, the network equipment of the second standard allows the UE to access in a roaming manner, and the first standard is different from the second standard; the method further includes: the case where no frequency point is searched under the HPLMN In this case, the UE skips the process of searching the frequency points of the first system of EPLMN, and searches the frequency points of the second system of EPLMN; wherein, the frequency points of the first system include the historical residence frequency points under the first system , and the frequency points in the whole frequency band, the frequency points of the second standard include the historical dwell frequency points under the second standard, and the frequency points in the whole frequency band.

In the above embodiment, the first operator and the second operator to which the subscriber identity module SIM card used by the UE belongs have jointly deployed network equipment whose network standard is the first standard, and the PLMN of the second operator is in the first standard. The FPLMN of the UE, the network equipment of the second standard allows the UE to access in a roaming manner, and the first standard is different from the second standard. Since the network standard deployed by the second operator is a network device of the second standard, a network whose network standard is the first standard is not provided. Therefore, when the network standard deployed by the second operator is a cell of the network equipment of the second standard, even if the UE searches for the frequency point of the first standard of the PLMN of the second operator, the second operator cannot be found. The frequency of the first system of the PLMN of the quotient. Therefore, in the cell search method under the multi-operator provided by the embodiment of the present application, in the case where no frequency point is searched under the HPLMN, the UE skips the process of searching for the frequency point of the first system of the EPLMN, and searches the frequency point of the first system of the EPLMN. The frequency point of the second standard is searched, so that the time occupied by the UE searching the frequency point of the first standard of the EPLMN can be saved, the time taken by the UE to perform cell search can be shortened, and the user experience can be ensured.

In another possible design manner of the first aspect, the method further includes: in the case of searching for a frequency point under the historical resident frequency point of the second standard, the UE sends registration information to the network device corresponding to the frequency point; Or, in the case where a frequency point is searched in the full frequency band of the second standard, the UE sends registration information to the network device corresponding to the frequency point.

In the above-mentioned embodiment, since the network standard deployed by the second operator is a network device of the second standard, a network whose network standard is the first standard is not provided. Therefore, when the network standard deployed by the second operator is a cell of the network equipment of the second standard, even if the UE searches for the frequency point of the first standard of the PLMN of the second operator, the second operator cannot be found. The frequency of the first system of the PLMN of the quotient. However, when the UE searches for the frequency point of the second standard of the PLMN of the second operator, the frequency point can be found. Therefore, in the cell search method under the multi-operator provided by the embodiment of the present application, after the UE skips the process of searching the frequency points of the first mode of EPLMN, if the UE searches for the frequency points of the second mode in the history of staying in the second mode In the case of a frequency point, the UE sends the registration information to the network device corresponding to the frequency point; or, when the frequency point is searched in the full frequency band of the second standard, the UE sends the registration information to the network device corresponding to the frequency point. In this way, the time occupied by the process of the UE searching on the frequency point of the first standard of the EPLMN can be saved, the time occupied by the UE to perform the cell search can be shortened, and the user's experience can be ensured.

In another possible design manner of the first aspect, searching under the HPLMN specifically includes: searching for the historical dwell frequency points of each system of the HPLMN; In the case where the frequency is not searched, the UE searches for the historical resident frequency of the PLMN found when searching for the HPLMN; it does not search for the historical resident frequency of the PLMN found when searching for the HPLMN. In the case of frequency points, the UE searches the full frequency band of each standard of HPLMN; if no frequency point is found in the full frequency band of each standard of HPLMN, the UE searches for the full frequency range of PLMN when searching for HPLMN. frequency band to search.

In the above embodiment, since the full frequency band of each system of any PLMN is searched, the occupied cell search time is long. Therefore, in the cell search method under the multi-operator provided by the embodiment of the present application, when searching the historical dwell frequency points of each standard of HPLMN; no frequency is searched under the historical dwell frequency points of each standard of HPLMN. In the case of the PLMN, the UE searches the historical resident frequency points of the PLMN that are searched when the HPLMN is searched; thus, the PLMN handover can be performed faster, and the UE can search for the frequency points faster. In the case that no frequency is found under the historical resident frequency of the PLMN searched for when searching for the HPLMN, the UE searches the full frequency band of each standard of the HPLMN; under the full frequency band of each standard of the HPLMN In the case where no frequency point is found, the UE searches the entire frequency band of the PLMN that is searched for when the HPLMN is searched. Therefore, while speeding up the PLMN handover, it is ensured that the UE can discover the available frequency points faster, and the user experience is improved.

In another possible design manner of the first aspect, the predefined PLMN is 46015, the first standard is 5G, and the second standard is 4G.

In the above embodiment, due to differences in the networks deployed by different operators, in the cell search method under multiple operators provided by the embodiments of the present application, the UE needs to determine that the HPLMN is 46015 and the UE meets the preset conditions. The information of the registered public land mobile network RPLMN is saved. At this time, the UE can determine that the process of searching for the RPLMN needs to be skipped, and the 5G frequency of the HPLMN is searched. When the 5G frequency of the HPLMN is not found. , the 4G frequency points of the HPLMN are searched, so as to ensure that the frequency points can be searched, the time for the UE to search for the RPLMN is saved, and the time for the UE to perform cell search is shortened.

In another possible design manner of the first aspect, the UE acquiring the location information of the UE includes: the UE acquiring the current coordinates of the UE. The coordinates are used to indicate the current geographic location of the UE.

In the above embodiment, since the networks deployed by operators in different regions or countries are different, in the cell search method under multi-operator provided by the embodiment of the present application, the UE needs to obtain the current coordinates after powering on, so that the UE can obtain the current coordinates according to the The coordinates determine the current geographic location, and according to the geographic location, determine the current region or country. Further, it can be determined whether to perform the cell search method under the multi-operator provided by the embodiment of the present application, so as to avoid the longer time taken for the UE to perform cell search because the country where it is currently located is not a predefined country.

In another possible design manner of the first aspect, obtaining the location information of the UE by the UE includes: the UE performs emergency camping on a cell currently searched for with access to the network; wherein the accessible network corresponds to one PLMN; the UE determines the location information of the UE according to the PLMN that can access the network.

In the above embodiment, since the networks deployed by operators in different regions or countries are different, in the cell search method under the multi-operator provided by the embodiment of the present application, the UE needs to search for the currently searched accessible cell after powering on. The cell of the network performs emergency camping, so that the location information of the UE can be determined according to the PLMN that can access the network, and the current region or country where it is located can be determined according to the location information. Further, it can be determined whether to perform the cell search method under the multi-operator provided by the embodiment of the present application, so as to avoid the longer time taken for the UE to perform cell search because the country where it is currently located is not a predefined country.

In a second aspect, the embodiments of the present application provide a cell search method under multiple operators, and the method can be applied to a UE. In the case that the UE successfully camps on the cell of the network device, the service of the UE is interrupted, and when requesting to restore the service, the UE searches for the historical camping frequency points of the first mode of HPLMN; in the history of the first mode of HPLMN In the case where no frequency is searched under the camping frequency, the UE searches for the historical camping frequency of the second standard of the UE's EPLMN; no frequency is searched under the historical camping frequency of the second standard of the EPLMN In the case of , the UE searches the full frequency band of the first standard of HPLMN; if no frequency point is searched in the full frequency band of the first standard of HPLMN, the UE searches the full frequency band of the second standard of EPLMN; In the case where no frequency is searched in the full frequency band of the second standard of EPLMN, the UE searches the PLMN searched when searching for the HPLMN. The device sends registration information.

In the above embodiment, as in the prior art, when the UE successfully camps on the cell of the network device, the service of the UE is interrupted, and when requesting to restore the service, the UE preferentially camps on the first standard of HPLMN. Search for reserved frequency points, or search for the full frequency band of the first standard of HPLMN. At this time, when the PLMN of the cell where the UE is located is different from the HPLMN, the service cannot be restored in time. For this reason, in the cell search method under multiple operators provided by the embodiments of this application, the first operator to which the SIM card of the UE belongs and the second operator jointly deploy network equipment, and the PLMN of the second operator is the EPLMN of the UE, The network equipment of the second standard allows the UE to access in a roaming manner, and the first standard is different from the second standard. So that the UE is within the coverage of the network equipment with the first network standard deployed by the first operator, or within the coverage of the network equipment with the second standard deployed by the second operator. Search for the historical resident frequency of the first system of HPLMN; if no frequency is searched under the historical resident frequency of the first system of HPLMN, the UE searches for the historical resident frequency of the second system of the UE's EPLMN. In the case where no frequency point is searched under the historical resident frequency point of the second standard of EPLMN, the UE searches the full frequency band of the first standard of HPLMN; under the full frequency band of the first standard of HPLMN In the case of searching for a frequency point, the UE searches the full frequency band of the second standard of EPLMN; if no frequency point is searched in the full frequency band of the second standard of EPLMN, the UE searches for the PLMN of the HPLMN. search; thus, the UE can search for available frequency points faster, save the time for the UE to search for the RPLMN, and shorten the time for the UE to search for a cell.

In a third aspect, an embodiment of the present application provides a cell search apparatus under multiple operators, including a transceiver unit and a processing unit. The cell search apparatus under multiple operators can be applied to user equipment UE. In the case that the UE meets the preset conditions, the UE performs a network search operation; wherein, the UE saves the information of the registered public land mobile network RPLMN, and the preset conditions include power-on or cell reselection; the network search operation includes:

The processing unit is configured to skip the process of searching under the RPLMN and search the HPLMN when the HPLMN of the UE is a predefined PLMN. The processing unit is further configured to control the transceiver unit to send registration information to the network device corresponding to the frequency point for requesting access to the network device when the frequency point is searched under the HPLMN. Wherein, the region or country corresponding to the predefined PLMN has a co-constructed network, and the network device providing the co-constructed network corresponds to multiple PLMNs.

In a possible design manner of the third aspect, the transceiver unit is used to obtain the location information of the UE. The processing unit is further configured to determine that the country where the UE is located is a predefined country according to the location information obtained by the transceiver unit.

In another possible design manner of the third aspect, the first operator to which the UE's subscriber identity module SIM card belongs and the second operator jointly deploy network equipment, and the PLMN of the second operator is the EPLMN of the UE; processing The unit is further configured to send registration information to the network device corresponding to the frequency of the EPLMN when no frequency is found under the HPLMN and the frequency of the EPLMN is found.

In another possible design manner of the third aspect, the processing unit is specifically configured to search the historical resident frequency points of the first system of the HPLMN. The processing unit is specifically configured to search for the historical resident frequency of the second standard of the HPLMN under the condition that no frequency is searched under the historical resident frequency of the first standard of the HPLMN, and the network device of the second standard allows The UE accesses in a roaming manner, and the first standard is different from the second standard. The processing unit is specifically configured to search the full frequency band of the first system of HPLMN when no frequency point is searched under the historical resident frequency point of the second system of HPLMN, and no frequency point of EPLMN is searched. The processing unit is specifically configured to search for the UE in the full frequency band of the second standard of the HPLMN when no frequency point is found in the full frequency band of the first standard of the HPLMN.

In another possible design manner of the third aspect, the processing unit is specifically configured to, in the case that no frequency is searched under the historical resident frequency of the second system of the HPLMN, and the frequency of the EPLMN is searched, Control the transceiver unit to send registration information to the network device corresponding to the frequency point of the EPLMN. Or, the processing unit is specifically configured to send the registration information to the network device corresponding to the frequency of the EPLMN when no frequency is found in the full frequency band of the second standard of the HPLMN, and the frequency of the EPLMN is found.

In another possible design manner of the third aspect, the first operator and the second operator to which the subscriber identity module SIM card used by the UE belongs to jointly deploy network equipment whose network standard is the first standard, and the second operator The PLMN of the UE is the FPLMN of the UE under the first standard, and the network equipment of the second standard allows the UE to access in a roaming mode, and the first standard is different from the second standard; In this case, the process of searching the frequency points of the first system of the EPLMN is skipped, and the frequency points of the second system of the EPLMN are searched. Among them, the frequency points of the first standard include the historical dwell frequency points under the first standard, and the frequency points in the whole frequency band, and the frequency points of the second standard include the historical dwell frequency points under the second standard, and the frequency points in the whole frequency band. frequency point.

In another possible design manner of the third aspect, the processing unit is specifically configured to control the transceiver unit to send the frequency to the network device corresponding to the frequency when the frequency is searched under the historical resident frequency of the second standard. registration message. Or, the processing unit is specifically configured to control the transceiver unit to send the registration information to the network device corresponding to the frequency point when the frequency point is searched in the full frequency band of the second standard.

In another possible design manner of the third aspect, the processing unit is specifically configured to search the historical resident frequency points of each standard of the HPLMN. The processing unit is specifically configured to search the historical resident frequency of the PLMN that is searched when the HPLMN is searched when no frequency is found under the historical resident frequency of each standard of the HPLMN. The processing unit is specifically configured to search the full frequency band of each standard of the HPLMN under the condition that no frequency points are found under the historical resident frequency points of the PLMN searched for when the HPLMN is searched. The processing unit is specifically configured to search the entire frequency band of the PLMN that is searched when the HPLMN is searched under the condition that no frequency points are found in the full frequency band of each standard of the HPLMN.

In another possible design manner of the third aspect, the predefined PLMN is 46015, the first standard is 5G, and the second standard is 4G.

In another possible design manner of the third aspect, the transceiver unit is specifically configured to acquire the current coordinates of the UE, wherein the coordinates are used to indicate the current geographic location of the UE.

In another possible design manner of the third aspect, the processing unit is specifically configured to perform emergency camping on the currently searched cell that can access the network; wherein, the accessible network corresponds to one PLMN; the processing unit, specifically It is used to determine the location information of the UE according to the PLMN that can access the network.

In a fourth aspect, an embodiment of the present application provides a cell search apparatus under multiple operators, including a transceiver unit and a processing unit. The cell search apparatus under multiple operators can be applied to user equipment UE. The processing unit is configured to search for the historical camping frequency points of the first standard of the HPLMN when the service of the UE is interrupted when the UE successfully camps on the cell of the network device and the service is requested to be resumed. The processing unit is further configured to search for the historical dwell frequency of the second standard of the EPLMN of the UE when no frequency is found under the historical dwell frequency of the first standard of the HPLMN. The processing unit is further configured to search the full frequency band of the first standard of the HPLMN under the condition that no frequency is searched under the historical resident frequency of the second standard of the EPLMN; If no frequency point is found in the full frequency band of one standard, search for the full frequency band of the second standard of EPLMN. The processing unit is also used to search the PLMN searched when the HPLMN is searched when the frequency points are not searched under the full frequency band of the second standard of the EPLMN; the processing unit is also used to search for the frequency points. Next, the transceiver unit is controlled to send registration information to the network device corresponding to the searched frequency point.

In a fifth aspect, embodiments of the present application provide an electronic device, including: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions, so that the electronic device performs the following actions: When the preset conditions are met, the electronic device performs a network search operation; wherein, the electronic device saves the information of the registered public land mobile network RPLMN, and the preset conditions include power-on or cell reselection; the network search operation includes: in the electronic device. When the HPLMN is a predefined PLMN, the electronic device skips the process of searching under the RPLMN and searches the HPLMN; when the frequency point is searched under the HPLMN, the electronic device sends the registration information to the network device corresponding to the frequency point , which is used to request access to a network device; wherein, a region or country corresponding to the predefined PLMN has a co-constructed network, and the network device providing the co-constructed network corresponds to multiple PLMNs.

In a possible design manner of the fifth aspect, the processor is configured to execute the instruction, so that the electronic device further executes the following actions: the electronic device acquires location information of the electronic device, and determines, according to the location information, that the country where the electronic device is located is a preset Define country.

In another possible design manner of the fifth aspect, the first operator to which the subscriber identity module SIM card of the electronic device belongs and the second operator jointly deploy network equipment, and the PLMN of the second operator is the EPLMN of the electronic device The processor is configured to execute the instruction, so that the electronic device also performs the following actions: under the HPLMN, the frequency point is not searched, and when the frequency point of the EPLMN is searched, the electronic device sends the registration to the network device corresponding to the frequency point of the EPLMN. information.

In another possible design manner of the fifth aspect, the processor is configured to execute the instruction, so that the electronic device specifically performs the following actions: the electronic device searches for the historical resident frequency point of the first standard of the HPLMN; If no frequency is found under the historical dwell frequency of the first standard, the electronic device searches for the historical dwell frequency of the second standard of HPLMN, and the network device of the second standard allows the electronic device to access in roaming mode. , the first standard is different from the second standard; if no frequency is found under the historical resident frequency of the second standard of HPLMN, and no frequency of EPLMN is found, the electronic device will not detect the frequency of the first standard of HPLMN. Search in the whole frequency band; if no frequency point is found in the whole frequency band of the first system of HPLMN, the electronic device searches in the whole frequency band of the second system of HPLMN.

In another possible design manner of the fifth aspect, the processor is configured to execute the instruction, so that the electronic device specifically performs the following actions: no frequency point is searched under the historical resident frequency point of the second standard of the HPLMN, and When the frequency point of EPLMN is searched, the electronic device sends registration information to the network device corresponding to the frequency point of EPLMN; or, no frequency point is searched under the full frequency band of the second standard of HPLMN, and the frequency point of EPLMN is searched In the case of , the electronic device sends registration information to the network device corresponding to the frequency point of the EPLMN.

In another possible design manner of the fifth aspect, the first operator and the second operator to which the subscriber identity module SIM card used by the electronic device belongs to jointly deploy network equipment whose network standard is the first standard, and the second operator The PLMN of the provider is the FPLMN of the electronic device in the first mode, the network device of the second mode allows the UE to access in roaming mode, the first mode is different from the second mode; the processor is configured to execute the instruction, so that the electronic device also executes The following actions: in the case that no frequency point is searched under the HPLMN, the electronic device skips the process of searching for the frequency point of the first system of the EPLMN, and searches the frequency point of the second system of the EPLMN; wherein, the first system The frequency points of the 1 system include the historical dwell frequency points under the first standard and the frequencies in the whole frequency band, and the frequency points of the second standard include the historical dwell frequency points under the second standard and the frequency points in the whole frequency band.

In another possible design manner of the fifth aspect, the processor is configured to execute the instruction, so that the electronic device specifically performs the following actions: in the case of searching for a frequency point under the historical resident frequency point of the second standard, the electronic device The device sends the registration information to the network device corresponding to the frequency point; or, when the frequency point is searched in the full frequency band of the second standard, the electronic device sends the registration information to the network device corresponding to the frequency point.

In another possible design manner of the fifth aspect, the processor is configured to execute the instructions, so that the electronic device specifically performs the following actions: search for the historical resident frequency points of each standard of the HPLMN; In the case where no frequency is found under the historical resident frequency of the standard, the electronic device searches for the historical resident frequency of the PLMN found when searching for the HPLMN; If no frequency point is found under the reserved frequency point, the electronic device searches the full frequency band of each standard of HPLMN; The search is performed in the full frequency band of the PLMN found when the HPLMN searches.

In another possible design manner of the fifth aspect, the predefined PLMN is 46015, the first standard is 5G, and the second standard is 4G.

In another possible design manner of the fifth aspect, the processor is configured to execute the instruction, so that the electronic device specifically performs the following actions: the electronic device acquires the current coordinates of the electronic device; wherein the coordinates are used to indicate the current location of the electronic device geographical location.

In another possible design manner of the fifth aspect, the processor is configured to execute the instruction, so that the electronic device specifically performs the following actions: the electronic device performs emergency camping on the currently searched cell that can access the network; wherein, The accessible network corresponds to one PLMN; the electronic device determines the location information of the electronic device according to the PLMN of the accessible network.

In a sixth aspect, embodiments of the present application provide an electronic device, including: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to execute the instructions, so that the electronic device performs the following actions: In the case of successfully camping on the cell of the network device, the service of the electronic device is interrupted, and when requesting to restore the service, the electronic device searches for the historical camping frequency point of the first mode of HPLMN; in the history of the first mode of HPLMN In the case where no frequency is found under the dwell frequency, the electronic device searches for the historical dwell frequency of the second system of the EPLMN; no frequency is found under the historical dwell frequency of the second standard of the EPLMN. Under the circumstance, the electronic device searches the full frequency band of the first standard of HPLMN; if no frequency point is searched in the full frequency band of the first standard of HPLMN, the electronic device searches the full frequency band of the second standard of EPLMN; In the case where no frequency point is found in the full frequency band of the second system of EPLMN, the electronic device searches the PLMN searched when the HPLMN searches; The corresponding network device sends the registration information.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, when an instruction in the storage medium is executed by a processor of an electronic device, the electronic device can execute the multi-operator as provided in the first aspect Cell search method below.

In an eighth aspect, an embodiment of the present application provides a computer program product, including, when the computer program product runs on a computer, causing the computer to execute the cell search method under multiple operators provided in the first aspect.

It can be understood that the system described in the third aspect and any possible design manner thereof, the electronic device described in the fifth aspect, the computer storage medium described in the seventh aspect, and the system described in the eighth aspect The computer program products are all used to execute the corresponding methods provided above. Therefore, for the beneficial effects that can be achieved, reference may be made to the beneficial effects of the cell search method under multiple operators provided in the first aspect provided above. , and will not be repeated here.

In a ninth aspect, an embodiment of the present application provides a computer-readable storage medium, when an instruction in the storage medium is executed by a processor of an electronic device, the electronic device can execute the multi-operator as provided in the second aspect Cell search method below.

In a tenth aspect, an embodiment of the present application provides a computer program product, including, when the computer program product runs on a computer, causing the computer to execute the cell search method under multiple operators provided in the second aspect.

It can be understood that the system described in the fourth aspect and any possible design manner thereof, the electronic device described in the sixth aspect, the computer storage medium described in the ninth aspect, and the system described in the tenth aspect The computer program products are all used to execute the corresponding methods provided above. Therefore, for the beneficial effects that can be achieved, reference may be made to the beneficial effects of the cell search method under multiple operators provided in the second aspect provided above. , and will not be repeated here.

Description of drawings

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

2 is a schematic flowchart of a UE performing cell search in the prior art;

FIG. 3 is one of the schematic diagrams that a UE can access a cell according to an embodiment of the present application;

FIG. 4 is one of the schematic diagrams of a scenario of a cell search method under a multi-operator provided by an embodiment of the present application;

FIG. 5 is the second schematic diagram of a cell search method under a multi-operator provided by an embodiment of the present application;

FIG. 6 is a third schematic diagram of a scenario of a cell search method under a multi-operator provided by an embodiment of the present application;

FIG. 7 is a fourth schematic diagram of a scenario of a cell search method under a multi-operator provided by an embodiment of the present application;

FIG. 8 is a fifth schematic diagram of a scenario of a cell search method under a multi-operator provided by an embodiment of the present application;

FIG. 9 is one of the schematic flowcharts of a cell search method under multiple operators provided by an embodiment of the present application;

FIG. 10 is the second schematic flowchart of a cell search method under multiple operators provided by an embodiment of the present application;

FIG. 11 is a third schematic flowchart of a cell search method under multiple operators provided by an embodiment of the present application;

FIG. 12 is a fourth schematic flowchart of a cell search method under a multi-operator provided by an embodiment of the present application;

FIG. 13 is a fifth schematic flowchart of a cell search method under multiple operators provided by an embodiment of the present application;

FIG. 14 is a sixth schematic flowchart of a cell search method under multiple operators provided by an embodiment of the present application;

FIG. 15 is a seventh schematic flowchart of a cell search method under multiple operators provided by an embodiment of the present application;

FIG. 16 is the eighth schematic flowchart of a cell search method under multiple operators provided by an embodiment of the present application;

17 is a ninth schematic flowchart of a cell search method under multiple operators provided by an embodiment of the present application;

Fig. 18 is the second schematic flow chart of UE performing cell search in the prior art;

FIG. 19 is a tenth schematic flowchart of a cell search method under multiple operators provided by an embodiment of the present application;

FIG. 20 is a sixth schematic diagram of a scenario of a cell search method under a multi-operator provided by an embodiment of the present application;

21 is a schematic structural diagram of a cell search apparatus under a multi-operator provided by an embodiment of the present application;

FIG. 22 is a schematic structural diagram of an electronic device under a multi-operator provided by an embodiment of the present application.

Detailed ways

Below, some terms in this application are explained:

1) The UE may be a terminal, or a device located in the terminal (for example, a chip in the terminal). The terminal is also called user equipment, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), etc., and is a device that provides voice/data connectivity to users. For example, a handheld device with a wireless connection function, or a vehicle-mounted device, etc. At present, some examples of terminals are: mobile phone (mobile phone), tablet computer, notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR) device, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart grids wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc.

2) A network device is a device in a wireless network, for example, a radio access network (radio access network, RAN) node that accesses a terminal to the wireless network. At present, some examples of RAN nodes are: gNB, transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B) B, NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, homeevolved NodeB, or home Node B, HNB), base band unit (BBU) ), or wireless fidelity (wireless fidelity, Wifi) access point (access point, AP), etc. In a network structure, the network device may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a RAN device including a CU node and a DU node.

3), "multiple" refers to two or more, and other quantifiers are similar. "And/or" describes the association relationship between associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone. Furthermore, occurrences of the singular forms "a", "an" and "the" do not mean "one or only one" unless the context clearly dictates otherwise, but rather "one or more" in one". For example, "a device" means to one or more of such devices. Furthermore, at least one (at least one of)......." means one or any combination of subsequent associated objects, eg "at least one of A, B and C" includes A, B, C, AB , AC, BC, or ABC. Determining Y from X does not mean determining Y from X alone, but also from X and other information.

4), PLMN refers to the network established and operated by the government or its approved operators for the purpose of providing land mobile communication services to the public. The PLMNs of different operators are different, and different network codes can be used to distinguish the PLMNs of different operators. For example, the network code of the PLMN of operator A is 46015, the network code of the PLMN of operator B is 46000, and the network code of the PLMN of operator C is 46001.

5) The HPLMN is the PLMN of the operator to which the SIM card of the UE belongs. If the operator to which the SIM card of the UE belongs is operator A, the HPLMN of the UE is the PLMN of operator A. The UE may read the HPLMNAct from the corresponding card file of the SIM card issued by the operator. HPLMNAct includes HPLMN information, such as HPLMN's network code, to determine its HPLMN. The HPLMNAct may further include: a radio access technology corresponding to the HPLMN.

6) The RPLMN refers to the PLMN that the UE registered (it can be understood as successfully registered) before the last shutdown or disconnection of the network. For example, the PLMN registered before the last shutdown of the UE is the PLMN of the operator B, then the RPLMN of the UE is the PLMN of the operator B. The RPLMN and the HPLMN of the UE may be the same or different. For example, if the HPLMN of the UE is the PLMN of the operator A, and the PLMN registered before the last shutdown of the UE is also the PLMN of the operator A, the RPLMN of the UE is also the PLMN of the operator A, that is, the RPLMN of the UE is the same as the HPLMN.

Before the UE is shut down or disconnected from the network, the information of the registered PLMN, such as a network code, may be temporarily saved in the corresponding card file of the SIM card, which is used to indicate that the PLMN corresponding to the information is the RPLMN of the UE. Wherein, under different modes, the UE may store the information of the PLMN registered before it is powered off or disconnected from the network in the loci file of the corresponding mode in the SIM card, so as to indicate the RPLMN of the UE in the corresponding mode. Afterwards, the UE may determine the RPLMN of the UE under the standard according to the LOCI file of the corresponding standard. For example, when the UE needs to determine the RPLMN under the first standard (such as the fifth generation mobile communication technology (5G)), the UE can read the corresponding RPLMN from the 5G-LOCI of the SIM card file issued by the operator information to determine the RPLMN in the first mode. Or, when the UE needs to determine the RPLMN under the second standard (such as the 4th generation mobile communication technology (4G)), the UE can read the corresponding SIM card file eps-LOCI issued by the operator. information to determine the RPLMN in the second mode.

7) Forbidden PLMN (Forbidden PLMN, FPLMN) is a PLMN whose access is forbidden. For example, operator A and operator C do not co-build network equipment, nor lease operator C's network equipment. If the operator to which the UE's SIM card belongs is operator A, the UE's FPLMN is operator C's PLMN. When the UE needs to determine the FPLMN, the UE can read the corresponding information from the corresponding card file of the SIM card issued by the operator to determine the FPLMN of the UE.

8) The equivalent PLMN (Equivalent PLMN, EPLMN) is a PLMN in the same status as the HPLMN of the UE. For example, the operator to which the SIM card of the UE belongs is operator A, the HPLMN of the UE is the PLMN of operator A, and operator A leases the network equipment of operator B, then the EPLMN of the UE is the PLMN of operator B. The UE may read the corresponding information from the corresponding card file of the SIM card issued by the operator to determine the EPLMN of the UE.

Please refer to FIG. 1 , which is a schematic diagram of a communication system according to an embodiment of the present application. As shown in FIG. 1 , in the communication system, the UE 110 communicates with other devices through a wireless network including a radio access network (RAN) and a core network (CN). The RAN is used to access the UE 110 to the wireless network, and the CN is used to manage the UE 110 and provide a gateway for communicating with the external network.

Take the wireless network as a 5G system (or 5G NR system, or NR system) as an example. The wireless network may include a network device 120, which is, for example, a RAN device (eg, a gNB), responsible for data transmission over the wireless interface. The core network may include signaling plane network elements, such as an access and mobility management function (AMF) 140 and a session management function (SMF) 150, responsible for building a data transmission channel. Among them, the SMF 150 is mainly responsible for session management, and the AMF 140 is mainly responsible for user management. The core network may also include data plane network elements, such as a user plane function (UPF) 160, which is mainly responsible for data forwarding.

At present, after the UE is powered on, it first needs to perform a cell search on the PLMN. After the UE finds an available cell, it accesses the cell, and after successful access, it can initiate registration in the cell. After successfully registering with the cell, the UE can enjoy network services in the cell. The UE usually performs cell search based on a cell search strategy. The cell search strategy is mainly to perform cell search under which PLMN first, and then under which PLMN to perform cell search. For example, in the case where the network code of the RPLMN is stored in the card file of the SIM card of the UE, the cell search is first performed under the RPLMN. If no cell is searched under the RPLMN, the priority order of each PLMN currently searched will be determined, and the search will be performed in sequence. If the currently searched PLMN includes a local public land mobile network (Home PLMN, HPLMN, such as the network of operator B), and the HPLMN has the highest priority, the UE switches to continue cell search under the HPLMN. After that, if no cell is searched under the HPLMN, the UE continues to search under other PLMNs according to the priority order. This results in a longer time for the UE to perform cell search.

In addition, the UE may be a multi-mode device that supports multiple standards. Therefore, the cell search strategy may also be included in a PLMN, which standard is used to perform cell search first, and then which standard is used to perform cell search. For example, if the UE supports the first standard and the second standard, the cell search under one PLMN may specifically include: the UE firstly performs a cell search under the first standard under the PLMN. If no cell is searched in the first mode, the cell search is performed in the second mode. If no cell is searched in the first mode and the second mode, the cell search will be performed in other PLMNs. This will undoubtedly increase the time for the UE to perform cell search.

In addition, one operator (or one PLMN) corresponds to one frequency band, each frequency band corresponds to multiple frequency points, and different frequency points can be understood as corresponding to different cells. In this embodiment, the UE performs a cell search. For example, the cell search performed under a certain PLMN network standard may specifically include: the UE searches for a frequency point in a frequency band corresponding to the PLMN under the PLMN network standard. Therefore, the cell search strategy may also be included in a PLMN, firstly searching the historical resident frequency points of each standard, and then searching the full frequency band (Full Band) of each standard. For example, if the UE supports the first mode and the second mode, the cell search under one PLMN may specifically include: the UE firstly searches the historical camping frequency points under the first mode under the PLMN. If no historical dwell frequency in the first mode is found, then search for the historical dwell frequency in the second mode. If the historical dwell frequency point of the second mode is not found, search the Full Band of the first mode again. If no frequency point of the first mode is found, search for the Full Band of the second mode. This will further increase the time used by the UE to perform cell search.

For example, as shown in FIG. 2 , based on the above cell search strategy, the UE supports the first and second standards, and performs cell search in the high standard first. For example, if the first standard is higher than the second standard, the related The cell search process provided by the technology can specifically include:

After the UE is powered on, restarted, or disconnected from the network, perform S11: the UE determines that the information of the RPLMN is stored. If this information is used to indicate that the RPLMN is PLMN-A.

Exemplarily, the information of the RPLMN is stored in the card file of the SIM card, or the information of the RPLMN is stored in the memory of the UE, which is not limited here.

S12 , the UE searches for the historical dwell frequency point (for example, referred to as the historical dwell frequency point 1 ) under the first mode of the RPLMN. If a frequency point is searched under the historical residence frequency point 1 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device a.

After the network device a receives the registration information from the UE, it accesses the UE to the cell according to the registration information. After the UE successfully accesses the cell, the network device a can provide network services for the UE. It should be noted that, the network device a in this embodiment refers to a type of network device deployed by an operator that can provide the network standard of the first standard, and does not specifically refer to a certain network device. For example, the UE determines that the information of the RPLMN is stored, and the information is used to indicate that the RPLMN is PLMN-A.

It should be noted that the network device a in this embodiment may refer to a type of network device deployed by operator A whose PLMN is PLMN-A and capable of providing the network standard of the first standard, rather than a specific network device. In addition, unless otherwise specified, the explanations of other network devices (eg, network device b, network device 1, network device 2, etc.) in the embodiments of the present application are similar to those of network device a, and will not be repeated. For example, the network device b may refer to a type of network device that is deployed by the PLMN for the operator B of the PLMN-B and can provide the network standard of the first standard, rather than a specific network device.

If no frequency is found under the historical resident frequency 1 of the RPLMN, perform S13.

In some embodiments, the frequency point of historical camping may be the frequency point information corresponding to the cell where the UE was camped on before the last time the UE was powered on, or restarted, or dropped from the network; in still other embodiments, the frequency point of historical camping may also be Frequency point information corresponding to the cell in which the terminal equipment once resided in the history.

S13, the UE searches for the historical dwell frequency point of the second standard in the RPLMN (for example, referred to as the historical dwell frequency point 2). If a frequency point is searched under the historical residence frequency point 2 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device b. Similarly, after the UE successfully registers with the cell, the network device b can provide network services for the UE.

Specifically, the description of the network device b is similar to the description of the foregoing network device a, and details are not repeated here.

If no frequency point is searched under the historical residence frequency point 2 of the RPLMN, perform S14.

S14. The UE searches for the Full Band (for example, called Full Band1) of the first standard under the RPLMN.

If a frequency point is searched under Full Band1 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device a. Similarly, after the UE successfully registers with the cell, the network device a can provide network services for the UE. If the frequency point is not searched under Full Band1 of RPLMN, then search the Full Band of the second standard of RPLMN (for example, called Full Band2). If a frequency point is found in the Full Band2 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device b. Similarly, after the UE successfully registers with the cell, the network device b can provide the UE with network services.

If no frequency point is searched under Full Band 2 of the RPLMN, the currently searched PLMNs will be sorted according to the pre-configured PLMN priority search order to determine the priority order of each PLMN currently searched for, and according to this priority The level order is searched under each PLMN in turn. For example, it is determined that PLMN-B is the PLMN with the highest priority among the currently searched PLMNs, and then switches to PLMN-B for searching. If no frequency is found in the historical resident frequency of the PLMN-B, and no frequency is found in the Full Band of the PLMN-B, continue to search the remaining PLMNs according to the priority order . If no frequency is searched in the remaining PLMN's historical resident frequency, and no frequency is searched in the Full Band of each remaining PLMN, it will enter Out Of Synchronization (OOS) .

It should be noted that the process of the UE searching under a PLMN (eg, HPLMN, RPLMN or other PLMNs) is similar to the process (S12-S14) of the UE searching under the RPLMN. For example, when it is determined that the HPLMN is PLMN-B, the UE firstly makes the historical camping frequency point (eg, becomes the historical camping frequency point 3) in the first mode of the UE to PLMN-B. If it is determined that no frequency is found in the historical dwell frequency 3 of PLMN-B, the UE searches for the historical dwell frequency of the second standard (eg, historical dwell frequency 4) in PLMN-B. It is determined that no frequency point is searched under the historical resident frequency point 4 of the PLMN-B, and the UE searches for the Full Band (for example, called Full Band 1) of the first standard under the PLMN-B. It is determined that no frequency point is searched under the Full Band1 of the PLMN-B, and the UE searches for the Full Band of the second standard (for example, called Full Band2) under the PLMN-B. If it is determined that no frequency points are found under Full Band 2 of PLMN-B, switch to other PLMNs to search.

As shown in FIG. 3 , for a UE, accessible cells can be divided into three types, namely: home cell, co-constructed cell, and other cells. The home cell may refer to a cell of a network device deployed by an operator to which the SIM card of the UE belongs. The co-constructed cell may refer to a cell of network equipment jointly deployed by the operator to which the SIM card of the UE belongs and other operators. The remaining cells are other cells. Take the UE's SIM card belonging to operator A as an example. As shown in FIG. 3 , the cell of the network device deployed by operator A is the home cell 101 shown in FIG. 3 . The cell of the network equipment jointly deployed by the operator A and the operator B, such as the co-constructed cell 103 shown in FIG. 3 . The remaining cells are other cells, such as other cells 102 shown in FIG. 3 . The other cells 102 may include other operators, such as cells of network devices deployed by operator C, and may also include cells of network devices deployed by operator B independently.

As shown in FIG. 3 , if the UE moves in the above-mentioned accessible cell and is powered on and off during the movement, various scenarios will be formed due to the difference in the cell where the UE is powered off and powered on. And in each scenario, the UE performs cell search according to the process shown in FIG. 1 .

These various scenarios are described below with examples.

Among them, in the following example, the SIM card of the UE belongs to operator A (such as China Radio and Television Network Co., Ltd., referred to as: radio and television), the PLMN of radio and television is PLMN-A (such as: 46015), and the home cell 101 is radio and television independent The cell where the network device is deployed, that is, the home cell 101 is the home cell of the UE. The other cells 102 are cells where operator B (eg, China Mobile Communications Corporation, China Mobile for short) independently deploys network equipment, and the mobile PLMN is PLMN-B (eg, 46000), that is, the other cells 102 are other cells of the UE. The co-constructed cell 103 is a cell of network equipment jointly deployed by the radio, television and mobile, that is, the co-constructed cell 103 is a co-constructed cell of the UE. Among them, the network provided by the network equipment jointly deployed by radio, television and mobile is called the co-construction network.

The network standard of the network equipment jointly deployed by radio, television and mobile is the first standard. The network standard of the network equipment independently deployed by the radio and television is the second standard. The radio and television leased network equipment independently deployed by mobile, the network standard of the network equipment is the second standard, and the network equipment allows the above-mentioned UE to access in a roaming manner. The network equipment of the radio and television department has no other standards except the first standard and the second standard, and the first standard is higher than the second standard. The first standard is 5G and the second standard is 4G as an example to illustrate the above scenarios. The following scenarios 1-5 can be included.

Scenario 1. Referring to FIG. 3 , as shown in FIG. 4 , the UE normally accesses the co-constructed cell 103 and then powers off, and moves to another cell 102 and then powers on. Wherein, the co-constructed cell 103 in the scenario 1 is the first cell in the embodiment of the application, and the other cells 102 are the second cell in the embodiment of the application.

Scenario 2, in conjunction with FIG. 3 , as shown in FIG. 5 , the UE normally accesses the home cell 101 and then powers off, and moves to another cell 102 and then powers on. The home cell 101 in the scenario 2 is the first cell in the embodiment of the application, and the other cells 102 are the second cell in the embodiment of the application.

Scenario 3, with reference to FIG. 3 , as shown in FIG. 6 , the UE normally accesses other cells 102 and then powers off, and moves to the co-constructed cell 103 and then powers on. The other cell 102 in the scenario 3 is the first cell in the embodiment of the application, and the co-constructed cell 103 is the second cell in the embodiment of the application.

Scenario 4, in conjunction with FIG. 3 , as shown in FIG. 7 , the UE normally accesses other cells 102 and then powers off, and moves to the home cell 101 and then powers on. The other cell 102 in the scenario 4 is the first cell in the embodiment of the application, and the home cell 101 is the second cell in the embodiment of the application.

Scenario 5, with reference to FIG. 3 , as shown in FIG. 8 , after the UE normally accesses other cells 102 , it shuts down, and restarts in the other cells 102 .

The embodiments of the present application provide a cell search method, which can solve the problem of a long time for the UE to perform cell search in the above scenarios 1 to 5.

FIG. 9 is a schematic flowchart of a cell search method provided by an embodiment of the present application. The cell search method is used to solve the problem that the UE takes a long time to perform cell search in the above scenarios 1, 2, 3 and 4. As shown in Figure 9, the method may include:

S901, the UE determines that the HPLMN is a predefined PLMN.

Wherein, the region or country corresponding to the predefined PLMN has a co-constructed network, and the network device providing the co-constructed network corresponds to multiple PLMNs. For example, in China, radio and television and China Mobile have jointly deployed network equipment with a network standard of 5G, which is used to provide co-construction networks. The UE can parse the PLMN of 46000 and the PLMN of 46015 from the broadcast message (eg, master information block (MIB) signaling) of the network device. When the carrier of the SIM card used by the UE belongs to the radio and television and moves to the coverage of the network equipment, although the UE can search for the network with PLMN 46000 and the network with PLMN 46015 at the same time, because the UE belongs to the optoelectronics UE, so UE needs to search for 46015, so as to join the network provided by Optoelectronics in this network device.

Specifically, the preset conditions include scenarios in which the UE needs to search for the RPLMN, such as when the UE is powered on or the UE performs cell reselection.

Exemplarily, in this embodiment of the present application, after the UE is powered on, the location information of the UE needs to be determined. For example, the UE can obtain any PLMN (such as 46015) by means of Emergency Camp On, and determine the country where the UE is located according to the mobile country code (Mobile country code, MCC) in the PLMN, such as in 46015 The MCC of the UE is 460, which means that the country where the UE is located is China. In addition, the UE can also obtain the current coordinates and determine the country where it is currently located according to the coordinates. (For example, each country corresponds to a coordinate set, and if the coordinate is determined to be in the coordinate set, it can be determined that the country where the UE is located is the country corresponding to the coordinate set). Exemplarily, the UE may obtain the current coordinates through any positioning system, and the positioning system at least includes a Global Positioning System (Global Positioning System, GPS) and a BeiDou Navigation Satellite System (BeiDou Navigation Satellite System, BDS).

When it is determined that the current country is a predefined country, the ordinary roaming network search is performed. When it is determined that the current country is a predefined country, the UE may determine whether the HPLMN of the UE is 46015. If it is determined that the HPLMN is 46015, execute S11. When the UE determines that the HPLMN of the UE is 46000, the cell search may be performed according to the process shown in FIG. 2 .

S11. The UE determines that the information of the RPLMN is stored.

Wherein, as described in the foregoing embodiments, the RPLMN refers to the PLMN registered by the UE before the last shutdown or disconnection of the UE. In scenario 1 to scenario 4 corresponding to Figure 4 to Figure 7, the PLMN registered before the UE is powered off or disconnected from the network is the PLMN of the cell that the UE accessed for the last time, and the UE moves, and the location where the UE is after the movement is moved. The cell and the last accessed cell belong to different operators, so that the PLMN corresponding to the RPLMN information saved by the UE is different from the PLMN of the operator to which the cell where the UE is currently located belongs. At this time, as stipulated in 4.4.3.1 of 23.122 of the 3rd Generation Partnership Project (3rd Generation Partnership Project, 3GPP), when the UE determines that the information of the RPLMN is stored, the UE needs to store the history of each standard supported by the UE of the RPLMN. However, at this time, the UE searches at the historical resident frequency points of each standard supported by the UE of the RPLMN, and cannot search for a cell under the RPLMN; or, if the UE starts from the highest standard (such as 5G) corresponding RPLMN searches, but cannot search for cells under this RPLMN; or, UE searches from the RPLMN corresponding to the last registered network standard (such as 4G), but cannot search for cells under this RPLMN. Therefore, in the embodiment of the present application, in the above scenarios 1 to 4, after determining that the HPLMN is a predefined PLMN, and the card file of the SIM card stores RPLMN information, the UE directly executes S902-S904. That is to say, the UE does not need to search under the RPLMN (for example, it does not need to perform S12-S14 shown in FIG. 2 ), thereby saving the cell search time occupied by the search under the RPLMN.

Exemplarily, taking the first cell as the co-constructed cell 103 and the second cell as the other cell 102 as an example, in combination with the scenario 1 shown in FIG. 3 and FIG. 4 , the carrier to which the SIM card used by the UE belongs is radio and television, The HPLMN stored by the UE is 46015. Since the co-constructed cell 103 is a 5G network device jointly deployed by radio, television and China Mobile, when the UE is in the co-constructed cell 103, the broadcast message (such as MIB signaling) acquired by the network device will be parsed as 46000 PLMN and 46015 PLMN. Since the co-deployed network device does not support roaming access, when the UE requests to access the co-established cell 103, it needs to search for 46015, so that when it searches for a frequency point under the 46015, it can pass the frequency point. The registration information is sent to the network device corresponding to the co-established cell 103 . When the UE turns off after successfully camping in the co-constructed cell 103 and moves to another cell 102 to power on, the UE determines that the stored RPLMN information is 46015, and the other cells 102 are owned by the network equipment with the 4G network standard independently deployed by the mobile. the corresponding district. At this time, when the UE is powered on in the other cell 102, the UE determines that the RPLMN is stored (46015), so the UE needs to search for the historical camping frequency points of each standard of 46015 in other cells 102, or to each Standard Full Band to search. Since the PLMN of the corresponding network equipment in other cells 102 is 46000, that is, other cells 102 only provide 4G frequencies (eg, frequency B) whose PLMN is 46000, so the UE cannot stay on the historical frequency of any standard of 46015. The frequency point (such as frequency point A) is searched in the point, and the frequency point (such as frequency point A) cannot be searched in the Full Band of any standard of 46015.

It should be noted that, in the scenarios 2, 3 and 4 shown in FIG. 5 to FIG. 7 , when the UE determines that the information of the RPLMN is stored, the UE skips the search for the RPLMN and directly searches for the HPLMN. The process of the above-mentioned UE in scenario 1 is similar, and will not be repeated here.

S902, the UE searches for the historical dwell frequency point (eg, referred to as the historical dwell frequency point 5) under the first standard of the HPLMN. If a frequency point is searched under the historical residence frequency point 5 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency is found under the historical resident frequency 5 of the RPLMN, perform S903.

S903, the UE searches for the historical dwell frequency point of the second standard of the HPLMN (for example, referred to as the historical dwell frequency point 6). If a frequency point is searched under the historical resident frequency point 6 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 .

If no frequency point is found under the historical dwell frequency point 6 of the HPLMN, perform S904.

S904, the UE searches for the Full Band (for example, called Full Band 5) of the first standard under the HPLMN. If a frequency point is searched under Full Band 5 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 . If the frequency point is not searched under the Full Band 5 of the HPLMN, the UE searches again in the Full Band (for example, called Full Band 6) of the second standard of the HPLMN. If a frequency point is searched under Full Band 6 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 . If no frequency point is found under Full Band 6 of HPLMN, perform S15.

It should be noted that the implementation manner of S902-S904 is similar to the corresponding implementation process in the foregoing S12-S14, and details are not repeated here.

If no frequency point is searched under Full Band 6 of HPLMN, the UE will sort the currently searched PLMNs according to the pre-configured PLMN priority search order to determine the priority order of each currently searched PLMN, and according to this The priority order is searched under each PLMN in turn. For example, if PLMN-B is the PLMN with the highest priority among the currently searched PLMNs, the frequency point is not searched under Full Band6 of HPLMN, and the UE switches to PLMN-B. A search is performed, ie, S15-S17 shown in FIG. 2 are performed.

If no frequency point is found in Full Band 6 of PLMN-B, the UE continues to search for the remaining PLMNs according to the priority order determined in S904 above. When it is determined that no frequency is found in the remaining PLMN's historically resident frequency, and no frequency is found in the Full Band 6 of the remaining PLMN, the UE enters OOS.

The above example is that when performing cell search on a PLMN, the UE first searches at the historical camping frequency points of each system of the PLMN. When no frequency is searched under the historical resident frequency point of each system of the PLMN, the UE searches again under the Full Band of each system of the PLMN. When no frequency point is searched under the Full Band of each standard of the PLMN, the search is performed by switching to the searched PLMN as an example to illustrate. Since the UE searches on the FullBand of each standard of the PLMN, this process will take up a large amount of time for cell search. Therefore, in some other embodiments of the present application, when the UE performs a cell search, the UE first searches for the historical camping frequency points of each standard of each PLMN. When no frequency is found under the historical resident frequency of each system of each PLMN, the UE searches again under the Full Band of each system of each PLMN, thereby shortening the time used by the UE for cell search. duration.

For example, with reference to FIG. 9 , after performing S901-S903 shown in FIG. 9 in the foregoing embodiment, the UE determines that no frequency point has been searched under the historical resident frequency point 6 of the HPLMN, and executes the operation shown in the foregoing embodiment as shown in FIG. 9 . 2 shown in S15 and S16. Therefore, the UE does not need to perform S15 and S16 as shown in FIG. 2 in the foregoing embodiment only after performing S904 shown in FIG. 9 in the foregoing embodiment and determining that no frequency point is found under Full Band 6 of the HPLMN. The process of searching in the Full Band of each standard of HPLMN, which takes up a lot of time for cell search, can be skipped, which shortens the time for the UE to switch PLMN during cell search. When no frequency is searched under the historical resident frequency of PLMN-B, execute S904 shown in the preceding embodiment as shown in FIG. 9 , and when no frequency is searched under Full Band 6 of HPLMN, execute the preceding embodiment as shown in FIG. 9 . S17 shown in 2, so that the time used by the UE to perform cell search can be shortened.

With the above technical solution, in the prior art, when the UE is in any of the above scenarios 1, 2, 3 and 4, when the UE searches under the RPLMN, it cannot search for a cell under the RPLMN. Therefore, in the cell search method provided by the embodiments of the present application, it is determined that the HPLMN is a predefined PLMN, and when it is determined that the information of the RPLMN is stored in the card file of the SIM card, the search is performed directly under the HPLMN, which saves the time required for searching under the RPLMN. The occupied duration of the cell search can further shorten the total duration of the occupied cell search by the UE.

FIG. 10 is a schematic flowchart of a cell search method provided by an embodiment of the present application. The cell search method is used to solve the problem that the UE takes a long time to perform cell search in the above scenarios 1, 2, 3 and 4. As shown in Figure 10, the method may include:

S1001. The UE determines that the HPLMN is a predefined PLMN.

S1002, the UE adds an EPLMN under the second standard.

S11. The UE determines that the information of the RPLMN is stored.

S12 , the UE searches for the historical dwell frequency point (for example, referred to as the historical dwell frequency point 1 ) under the first mode of the RPLMN. If a frequency point is searched under the historical residence frequency point 1 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 . If no frequency is found under the historical resident frequency 1 of the RPLMN, S1003 is executed.

S1003, the UE searches for the historical dwell frequency point of the second standard in the RPLMN (for example, referred to as the historical dwell frequency point 2). If a frequency point is searched under the historical resident frequency point 2 of the RPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. Or, if a frequency point is searched under frequency point 2 of the EPLMN's historical residence, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 .

Wherein, as described in the foregoing embodiments, the EPLMN is a PLMN on the same level as the HPLMN of the UE. In the scenarios 1 to 4 corresponding to Figure 4 to Figure 7, when the UE searches under a PLMN, even if the frequency points in the historically resident frequency points of the EPLMN are searched, the UE cannot immediately initiate registration with the network device , but it is determined that when no frequency is found in the historical resident frequency of any system of the PLMN, and the search is performed after switching to the EPLMN, when the frequency in the historical resident frequency of the EPLMN is searched again, Only then can you initiate registration with the network device. Therefore, in the cell search method provided by the embodiments of the present application, by adding the EPLMN of the second standard, for example, when the UE searches under the RPLMN, and searches for the frequency points in the historically resident frequency points of the EPLMN, the UE can immediately report to the network When the device initiates registration, it is not necessary for the UE to determine that no frequency has been searched in the historical resident frequency of any standard of the RPLMN, and after switching to the EPLMN, it will search again for the frequency in the historical resident frequency of the EPLMN. Only then can the registration be initiated with the network device, so that the cell search time occupied by the RPLMN search can be shortened. If no frequency point is searched under the historical dwell frequency point 2 of the RPLMN, and no frequency point is searched under the historical dwell frequency point 2 of the EPLMN, perform S1004.

Exemplarily, taking the first cell as the home cell 101 and the second cell as the other cell 102 as an example, in combination with the scenario 2 shown in FIG. 3 and FIG. 5 , the carrier to which the SIM card used by the UE belongs is the radio and television, then the The HPLMN stored by the UE is 46015. And because the network equipment of 5G is jointly deployed by the radio and television and the mobile, and the network equipment of the mobile is rented by the radio and television with the network standard of 4G, so that the users of the radio and television are not covered by the network equipment deployed by the radio and television, but are independently deployed in the mobile. When the coverage of the network equipment is within the coverage area, the users of the radio and television can access the network equipment independently deployed by the mobile through roaming. Therefore, in this embodiment of the present application, it is determined that the mobile 46000 is the EPLMN of 46015 under 4G. Since the home cell 101 is a 4G network device independently deployed by radio and television, when the UE is in the home cell 101, it will resolve the broadcast message (such as MIB signaling) obtained from the network device to a PLMN of 46015. At this time, when the UE requests to access the home cell 101, it needs to search for 46015, so when a frequency point is searched under the 46015, it can send registration information to the network device corresponding to the home cell 101 through the frequency point. When the UE turns off after successfully camping on the home cell 101 and moves to another cell 102 to power on, the RPLMN information stored by the UE at this time is 46015, and the other cell 102 moves to the cell corresponding to the network equipment whose network standard is 4G independently deployed. . The UE determines that the RPLMN is stored (46015), so the UE needs to search for the historical camping frequency points of each standard of 46015 in other cells 102, or to search for the Full Band of each standard of 46015. Since the PLMN of the corresponding network equipment in other cells 102 is 46000, that is, other cells 102 only provide 4G frequencies (eg, frequency B) whose PLMN is 46000, so the UE cannot stay on the historical frequency of any standard of 46015. The frequency point (such as frequency point A) is searched in the point, even if the 46000 4G frequency point (such as frequency point B) is searched. The UE also cannot initiate registration with the network device immediately. Alternatively, the UE cannot search for a frequency point (such as frequency point A) in the Full Band of any standard of 46015, even if it searches for a 4G frequency point (such as frequency point B) of 46000. The UE also cannot initiate registration with the network device immediately. Instead, it is determined that the frequency point (such as frequency point A) is searched in the historical resident frequency point of any standard of 46015, and the frequency point (such as frequency point A) cannot be searched in the Full Band of any standard of 46015. Afterwards, the UE searches for 46000. When a frequency point is found in the historical resident frequency points of 46000 4G, a registration message can be sent to the network device corresponding to the frequency point at this time.

It should be noted that in scenario 1, scenario 3 and scenario 4 shown in FIG. 4 , FIG. 6 and FIG. 7 , when the UE determines that the information of the RPLMN is stored, the UE searches under the historical residence frequency of any PLMN. , and the process of the UE searching under the Full Band of any PLMN is similar to the process of the UE in the scenario 2 above, and will not be repeated here.

S1004, the UE searches for the Full Band (for example, called Full Band1) of the first standard under the RPLMN.

If a frequency point is found under Full Band1 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 . For example, the UE sends registration information to the network device 3 .

If no frequency point is found in the Full Band 1 of the RPLMN, then search the Full Band of the second standard of the RPLMN (for example, called Full Band 2). If a frequency point is searched under Full Band2 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 . Or, if a frequency point is searched under FullBand2 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 . If no frequency point is searched under Full Band2 of RPLMN, and no frequency point is searched under Full Band2 of EPLMN, perform S15.

If no frequency point is searched under Full Band2 of RPLMN, and no frequency point is searched under Full Band2 of EPLMN, the UE searches in sequence according to the priority order of each PLMN currently searched, such as determining PLMN-B If it is the PLMN with the highest priority among the currently searched PLMNs, the UE does not search for a frequency point in the Full Band 2 of the RPLMN, and switches to the PLMN-B to search, that is, S15 in FIG. 2 is performed.

S15: The UE searches for the historical dwell frequency point of the first system of the PLMN-B (for example, it becomes the historical dwell frequency point 3). If the frequency point is searched under the historical resident frequency point 3 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency point is searched under the historical resident frequency point 3 of the PLMN-B, perform S1005.

It should be noted that the RPLMN stored in the card file of the SIM card in S11 is different from the PLMN-B.

S1005 , the UE searches for the historical resident frequency point of the second standard of the PLMN-B (for example, it becomes the historical resident frequency point 4 ). If a frequency point is searched in the historical resident frequency point 4 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. Or, if a frequency point is searched under the historical residence frequency point 4 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency point is searched in the historical dwell frequency point 4 of the PLMN-B, and no frequency point is searched under the historical dwell frequency point 4 of the EPLMN, perform S1006.

S1006, the UE searches for the Full Band (for example, called Full Band 3) of the first standard of the PLMN-B.

If a frequency point is found in Full Band 3 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If the frequency point is not searched in the Full Band 3 of PLMN-B, then search in the Full Band (for example, called Full Band 4) of the second standard of PLMN-B.

If a frequency point is found in Full Band 4 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 . Or, if a frequency point is searched under Full Band 4 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency is found in Full Band 4 of PLMN-B, and no frequency is found in Full Band 4 of EPLMN, continue to search for the remaining PLMNs according to the priority order determined in S1004 above. It is determined that no frequencies are found in the remaining PLMN's historical resident frequencies, and when no frequencies are found in the Full Band of the remaining PLMNs, OOS is entered.

The above example is that when a PLMN is searched for cells, even if the frequency points in the historical resident frequency points of the EPLMN are searched, the UE cannot immediately initiate registration with the network device, but determines the history of any standard in the PLMN. When no frequency is found in the camping frequency, the UE searches again under the Full Band of each standard of the PLMN. When no frequency point is searched under the Full Band of each standard of the PLMN, it is only switched to the searched PLMN for searching as an example to illustrate. Because when the UE searches in the Full Band of each standard of the PLMN, the process will take up a lot of time for cell search, and when the UE searches in a PLMN, even if it searches for the frequency in the historically resident frequency points of the EPLMN At this point, the UE cannot immediately initiate registration with the network device. Therefore, in some other embodiments of the present application, by adding the EPLMN of the second standard, for example, when the UE searches under one PLMN, it first searches the historical residence frequency points of each standard of each PLMN. If the frequency points in the historical resident frequency points of the second standard of the EPLMN are searched, the UE can immediately initiate registration with the network device. If no frequency is searched under the historical resident frequency point of each system of each PLMN, the UE searches again under the Full Band of each system of each PLMN. When the frequency point is not searched under the Full Band of each standard of each PLMN, it switches to the searched PLMN for searching, so that the time used by the UE to perform cell search can be shortened.

For example, referring to FIG. 10 , after performing S1001-S1003 shown in FIG. 10 in the foregoing embodiment, the UE determines that no frequency point is found in the historical dwell frequency point 2 of the RPLMN, and the UE determines that no frequency point is found in the historical dwell frequency point 2 of the EPLMN. If no frequency point is found under point 2, S15 shown in FIG. 2 in the foregoing embodiment and S1005 shown in FIG. 10 in the foregoing embodiment are performed. Therefore, the UE does not need to perform the above-mentioned procedure after performing S1004 as shown in FIG. 10 in the foregoing embodiment and determining that no frequency points are found under Full Band 2 of the RPLMN, and no frequency points are found under the Full Band 2 of the EPLMN. In the embodiment, S15 shown in FIG. 2 and S1005 shown in FIG. 10 in the foregoing embodiment are performed. Therefore, the process of searching in the Full Band of each standard of the PLMN, which takes up a large amount of time for cell search, can be skipped, and the time for the UE to switch PLMNs during cell search is shortened. When no frequency point is searched in the historical dwell frequency point 4 of the PLMN-B, and no frequency point is searched under the historical dwell frequency point 4 of the EPLMN, perform S1004 and S1004 as shown in FIG. 10 in the foregoing embodiment. In the foregoing embodiment, as shown in S17 in FIG. 2 , the time period for the UE to perform cell search can be shortened.

Using the above technical solution, in the prior art, when the UE is in any of the above scenarios 1, 2, 3 and 4, since the UE searches under one PLMN, even if the historical resident frequency of the EPLMN is searched The UE cannot immediately initiate registration with the network device, that is, the UE must determine that no frequency has been searched in the historical resident frequency of any standard of the PLMN, and after switching to the EPLMN, the EPLMN is searched again. Only when the frequency points in the frequency points in the history of resident frequency points can be registered with the network device at this time. For this reason, the cell search method provided by the embodiments of the present application adds the EPLMN of the second standard. frequency, the UE immediately initiates registration with the network device, and does not need to search for the history of the EPLMN again after switching to the EPLMN when the UE determines that no frequency is found in the historically resident frequency of any standard of the RPLMN. Only when the frequency points in the frequency points are camped on, the registration can be initiated with the network device, thereby saving the time for cell search occupied by the handover PLMN.

FIG. 11 is a schematic flowchart of a cell search method provided by an embodiment of the present application. The cell search method is used to solve the problem that the UE takes a long time to perform cell search in the above scenarios 1, 2, 3 and 4. As shown in Figure 10, the method may include:

S1101. The UE determines that the HPLMN is a predefined PLMN.

S1102. The UE adds an EPLMN in the second system.

S11. The UE determines that the information of the RPLMN is stored.

It should be noted that the specific implementation that the UE does not need to search under the RPLMN is similar to the specific implementation that the UE does not need to search under the RPLMN in the foregoing embodiment, and will not be repeated here.

S1103 , the UE searches for the historical dwell frequency point (for example, referred to as the historical dwell frequency point 5 ) under the first standard of the HPLMN. If a frequency point is searched under the historical residence frequency point 5 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency is found under the historical resident frequency 5 of the HPLMN, S1104 is executed.

S1104, the UE searches for the historical dwell frequency point of the second standard of the HPLMN (for example, referred to as the historical dwell frequency point 6). If a frequency point is searched under the historical resident frequency point 6 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point.

Alternatively, if a frequency point is searched under the historical residence frequency point 6 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 .

Wherein, as described in the foregoing embodiments, the EPLMN is a PLMN on the same level as the HPLMN of the UE. In the scenarios 1 to 4 corresponding to Figure 4 to Figure 7, when the UE searches under a PLMN, even if the frequency points in the historically resident frequency points of the EPLMN are searched, the UE cannot immediately initiate registration with the network device , but it is determined that when no frequency is found in the historical resident frequency of any system of the PLMN, and the search is performed after switching to the EPLMN, when the frequency in the historical resident frequency of the EPLMN is searched again, Only then can you initiate registration with the network device. Therefore, in the cell search method provided by the embodiment of the present application, by adding the EPLMN of the second standard, for example, when the UE searches under the HPLMN, and searches for the frequency points in the historically resident frequency points of the EPLMN, the UE can immediately report to the network When the device initiates registration, it is not necessary for the UE to determine that no frequency has been searched in the historical resident frequency of any standard of the HPLMN, and after switching to the EPLMN, it will search again for the frequency in the historical resident frequency of the EPLMN. Only then can the registration be initiated with the network device, so that the cell search time occupied by the HPLMN search can be shortened. If no frequency is searched under the historical dwell frequency 2 of the HPLMN, and no frequency is searched under the historical dwell frequency 2 of the EPLMN, perform S1104.

Exemplarily, taking the first cell as another cell 102 and the second cell as the home cell 101 as an example, in conjunction with scenario 4 shown in FIG. 3 and FIG. 7 , the carrier to which the SIM card used by the UE belongs is a radio and television, then the The HPLMN stored by the UE is 46015. Since the 5G network equipment jointly deployed by the radio and television and the mobile network equipment is rented by the radio and television network, the radio and television users have the coverage of the network equipment not deployed by the radio and television, while the network equipment deployed independently by the radio and television When the coverage of the network equipment is within the coverage area, the users of the radio and television can access the network equipment independently deployed by the mobile through roaming. At this time, when the UE is in another cell 102, it will be parsed from the broadcast message (such as MIB signaling) obtained by the network device to a PLMN of 46000, and 46000 needs to be searched. The frequency point can be accessed by roaming and the registration information can be sent to the network device corresponding to the other cell 102 . However, when the UE turns off after successfully camping in other cells 102 and moves to the home cell 101 to turn on, it will resolve the broadcast message (eg MIB signaling) obtained from the network device to the PLMN of 46015. At this time, the UE determines that the RPLMN (46000) is stored, so the UE needs to search for the historical dwell frequency points of each standard of 46000 in the home cell 101, or to search for the Full Band of each standard of 46000, even if In any of the above stages, the 4G frequency point of 46015 (such as frequency point A) is searched, and the UE cannot immediately initiate registration with the network device. Instead, no frequency point is searched in the historical resident frequency points of any standard of 46000. , and when no frequency is found in the historical resident frequency of Full Band of any standard of 46000, the UE searches for 46000 at this time, and when the frequency is searched in the historical resident frequency of 46000 4G , the registration information can be sent to the network device corresponding to the frequency point only at this time.

It should be noted that in scenario 1, scenario 2 and scenario 3 shown in FIG. 4 , FIG. 5 and FIG. 6 , when the UE determines that the information of the RPLMN is stored, the UE searches under the historical residency frequency of any PLMN. The process is similar to the process of the above-mentioned UE in scenario 4, and will not be repeated here.

If no frequency point is searched under the historical dwell frequency point 6 of the HPLMN, and no frequency point is searched under the historical dwell frequency point 6 of the EPLMN, perform S1105.

S1105, the UE searches for the Full Band (for example, called Full Band 5) of the first standard under the HPLMN. If a frequency point is searched under Full Band 5 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 . If the frequency point is not searched under the Full Band 5 of the HPLMN, the UE searches again in the Full Band (for example, called Full Band 6) of the second standard of the HPLMN. If a frequency point is searched under Full Band 6 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 . Or, if a frequency point is searched under Full Band 6 of the EPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 . If no frequency point is searched under Full Band 6 of HPLMN, and no frequency point is searched under Full Band 6 of EPLMN, perform S15.

It should be noted that the implementation manner of S1103-S1105 is similar to the corresponding implementation process in the foregoing S12-S14, and details are not repeated here.

If no frequency point is searched under Full Band 6 of HPLMN, the UE will sort the currently searched PLMNs according to the pre-configured PLMN priority search order to determine the priority order of each currently searched PLMN, and according to this The priority order is searched under each PLMN in turn. For example, if PLMN-B is the PLMN with the highest priority among the currently searched PLMNs, the frequency point is not searched under Full Band6 of HPLMN, and the UE switches to PLMN-B. A search is performed, that is, S15 shown in FIG. 2 is performed.

S15: The UE searches for the historical dwell frequency point of the first system of the PLMN-B (for example, it becomes the historical dwell frequency point 3). If the frequency point is searched under the historical resident frequency point 3 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency point is searched under the historical resident frequency point 3 of the PLMN-B, perform S1106.

It should be noted that the RPLMN stored in the card file of the SIM card in S11 is different from the PLMN-B.

S1106: The UE searches for the historical dwell frequency point of the second standard of the PLMN-B (for example, it becomes the historical dwell frequency point 4). If a frequency point is searched in the historical resident frequency point 4 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. Or, if a frequency point is searched under the historical residence frequency point 4 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency is found in the historical dwell frequency 4 of the PLMN-B, and no frequency is found in the historical dwell frequency 4 of the EPLMN, then execute S1107.

S1107: The UE searches for the Full Band (for example, called Full Band 3) of the first standard of the PLMN-B.

If a frequency point is found in Full Band 3 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If the frequency point is not searched in the Full Band 3 of PLMN-B, then search in the Full Band (for example, called Full Band 4) of the second standard of PLMN-B.

If a frequency point is found in Full Band 4 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 . Or, if a frequency point is searched under Full Band 4 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency is found in Full Band 4 of PLMN-B, and no frequency is found in Full Band 4 of EPLMN, continue to search for the remaining PLMNs according to the priority order determined in S1105 above. It is determined that no frequencies are found in the remaining PLMN's historical resident frequencies, and when no frequencies are found in the Full Band of the remaining PLMNs, OOS is entered.

The above example is that when a PLMN is searched for cells, even if the frequency points in the historical resident frequency points of the EPLMN are searched, the UE cannot immediately initiate registration with the network device, but determines the history of any standard in the PLMN. When no frequency is found in the camping frequency, the UE searches again under the Full Band of each standard of the PLMN. When no frequency point is searched under the Full Band of each standard of the PLMN, it is only switched to the searched PLMN for searching as an example to illustrate. Because when the UE searches in the Full Band of each standard of the PLMN, the process will take up a lot of time for cell search, and when the UE searches in a PLMN, even if it searches for the frequency in the historically resident frequency points of the EPLMN At this point, the UE cannot immediately initiate registration with the network device. Therefore, in some other embodiments of the present application, by adding the EPLMN of the second standard, for example, when the UE searches under one PLMN, it first searches the historical residence frequency points of each standard of each PLMN. If the frequency points in the historical resident frequency points of the second standard of the EPLMN are searched, the UE can immediately initiate registration with the network device. If no frequency is searched under the historical resident frequency point of each system of each PLMN, the UE searches again under the Full Band of each system of each PLMN. When the frequency point is not searched under the Full Band of each standard of each PLMN, it switches to the searched PLMN for searching, so that the time used by the UE to perform cell search can be shortened.

For example, with reference to FIG. 11 , after performing S1101-S1104 shown in FIG. 11 in the foregoing embodiment, the UE determines that no frequency has been searched under the historical dwell frequency point 6 of the HPLMN, and the historical dwell frequency point of the EPLMN is not found. If no frequency point is found under point 6, S15 shown in FIG. 2 in the foregoing embodiment and S1106 shown in FIG. 11 in the foregoing embodiment are performed. Therefore, the UE does not need to determine that no frequency point is searched under the Full Band 6 of the HPLMN, and no frequency point is searched under the Full Band 6 of the EPLMN, after performing S1105 as shown in FIG. For example, S15 shown in FIG. 2 and S1106 shown in FIG. 11 in the foregoing embodiment are executed, so that the process of searching in the Full Band of each standard of the PLMN, which takes up a large number of cell searches, can be skipped, shortening the time. Indicates the duration for the UE to switch PLMNs during cell search. When no frequency point is searched in the historical dwell frequency point 4 of the PLMN-B, and no frequency point is searched under the historical dwell frequency point 4 of the EPLMN, perform S1005 and S1005 as shown in FIG. 11 in the foregoing embodiment. In the foregoing embodiment, as shown in S17 in FIG. 2 , the time period for the UE to perform cell search can be shortened.

With the above technical solution, in the prior art, when the UE is in any of the above scenarios 1, 2, 3 and 4, when the UE searches under the RPLMN, it cannot search for a cell under the RPLMN, and because When the UE searches in a PLMN, even if it finds the frequency points in the historical resident frequency points of the EPLMN, the UE cannot immediately initiate registration with the network device, that is, the UE must determine the historical resident frequency points of any standard in the PLMN. When no frequency is found in the points, and after switching to the EPLMN, the registration can be initiated to the network device only when the frequency in the historically resident frequency points of the EPLMN is searched again. For this reason, in the cell search method provided by the embodiment of the present application, when the UE determines that the HPLMN is a predefined PLMN, and determines that the information of the RPLMN is stored in the card file of the SIM card, the UE searches directly under the HPLMN, which saves the need for searching under the RPLMN. The duration of the occupied cell search. Further, by adding the EPLMN of the second standard, if the UE searches for the historical dwelling frequency of the second standard of the HPLMN, if the frequency in the historical dwelling frequency of the EPLMN is searched, the UE immediately reports to the network device. Initiating registration, it is not necessary for the UE to search for a frequency point in the historical residence frequency point of the EPLMN again after switching to the EPLMN after determining that the frequency point has not been searched in the historical residence frequency point of any standard of the HPLMN. Only then can the registration be initiated with the network device, thereby saving the time for cell search occupied by the handover PLMN.

FIG. 12 is a schematic flowchart of a cell search method provided by an embodiment of the present application. The cell search method is used to solve the problem that the UE takes a long time to perform cell search in the above scenarios 1, 2, 3 and 4. As shown in Figure 12, the method may include:

S1201. The UE determines that the HPLMN is a predefined PLMN.

S1202. The UE determines that the information of the RPLMN is not stored.

Wherein, as described in the foregoing embodiments, the RPLMN refers to the PLMN registered by the UE before the last shutdown or disconnection of the UE. In the scenarios 1 to 4 corresponding to FIG. 4 to FIG. 7 , the PLMN registered before the UE is powered off or disconnected from the network is the PLMN of the cell that the UE accessed for the last time. Since the RPLMN is stored in the card file of the SIM card, when the UE is abnormal, the RPLMN may not be stored in the card file of the SIM card, so that after the UE is powered on again, it is determined that no RPLMN information is stored.

S1203, the UE searches for the historical dwell frequency point (for example, referred to as the historical dwell frequency point 5) under the first standard of the HPLMN. If a frequency point is searched under the historical residence frequency point 5 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency is found under the historical resident frequency 5 of the RPLMN, S1204 is executed.

S1204, the UE searches for the historical dwell frequency point of the second standard of the HPLMN (for example, referred to as the historical dwell frequency point 6). If a frequency point is searched under the historical resident frequency point 6 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 . If no frequency point is searched under the historical resident frequency point 6 of the HPLMN, perform S15 and S16.

Among them, in the scenario 1-scenario 4 corresponding to FIG. 4-FIG. 7, when the UE performs a search in the Full Band of each standard of a PLMN, the process will occupy a large amount of cell search time. Therefore, in the embodiment of the present application, in the above scenarios 1 to 4, when the UE performs cell search, it first searches for the historical residency frequency points of each system of each PLMN. When no frequency is searched under the historical resident frequency point of each system of each PLMN, the UE searches again under the Full Band of each system of each PLMN. When no frequency point is searched under the Full Band of each standard of each PLMN, it switches to the searched PLMN for search, thereby shortening the time used by the UE to perform cell search.

Exemplarily, taking the first cell as the co-constructed cell 103 and the second cell as the other cell 102 as an example, in combination with the scenario 1 shown in FIG. 3 and FIG. 4 , the carrier to which the SIM card used by the UE belongs is radio and television, The HPLMN stored by the UE is 46015. Since the co-constructed cell 103 is a 5G network device jointly deployed by radio, television and China Mobile, when the UE is in the co-constructed cell 103, the broadcast message (such as MIB signaling) acquired by the network device will be parsed as 46000 PLMN and 46015 PLMN. Since the co-deployed network device does not support roaming access, when the UE requests to access the co-established cell 103, it needs to search for 46015, so that when it searches for a frequency point under the 46015, it can pass the frequency point. The registration information is sent to the network device corresponding to the co-established cell 103 . When the UE turns off after successfully camping on the co-established cell 103 and moves to another cell 102 to turn on, the UE determines that no RPLMN is stored (46015). At this time, the UE needs to search for the historical dwelling frequency points of each standard of HPLMN (46015) in other cells 102. If no frequency is found in the historical dwelling frequency points of each standard of HPLMN (46015), then The UE searches under the historical dwell frequency of each standard of the searched PLMN. If the historical resident frequency points of each system of the searched PLMN are the searched frequency points (such as frequency point B), the UE searches in the Full Band of each system of the HPLMN (46015). If it is determined that no frequency points are searched under the Full Band of each standard of HPLMN (46015), the UE searches under the Full Band of each standard of the PLMN that has been searched.

It should be noted that the implementation manner of S1202-S1204 is similar to the corresponding implementation process in the foregoing S12-S14, and details are not repeated here.

If no frequency point is searched under the historical resident frequency point 6 of the HPLMN, the UE will sort the currently searched PLMNs according to the pre-configured PLMN priority search order to determine the priority order of each currently searched PLMN , and search under each PLMN in turn according to the priority order. For example, if PLMN-B is the PLMN with the highest priority among the currently searched PLMNs, no frequency point is searched under the historical resident frequency point 6 of the HPLMN. , the UE switches to the PLMN-B for searching, that is, executes S15 and S16 shown in FIG. 2 .

S15: The UE searches for the historical dwell frequency point of the first system of the PLMN-B (for example, it becomes the historical dwell frequency point 3). If the frequency point is searched under the historical resident frequency point 3 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency point is searched under the historical resident frequency point 3 of the PLMN-B, perform S16.

It should be noted that the RPLMN stored in the card file of the SIM card in S11 is different from the PLMN-B.

S16. The UE searches for the historical dwell frequency point of the second standard of PLMN-B (for example, it becomes the historical dwell frequency point 4). If a frequency point is searched in the historical resident frequency point 4 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency point is found in the historical resident frequency point 4 of the PLMN-B, perform S1205.

S1205, the UE searches for the Full Band (for example, called Full Band 5) of the first standard under the HPLMN. If a frequency point is searched under Full Band 5 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 . If the frequency point is not searched under the Full Band 5 of the HPLMN, the UE searches again in the Full Band (for example, called Full Band 6) of the second standard of the HPLMN. If a frequency point is searched under Full Band 6 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 . If no frequency point is found under Full Band 6 of HPLMN, perform S17.

S17: The UE searches for the Full Band (for example, called Full Band 3) of the first standard of the PLMN-B.

If a frequency point is found in Full Band 3 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If the frequency point is not searched in the Full Band 3 of PLMN-B, then search in the Full Band (for example, called Full Band 4) of the second standard of PLMN-B.

If a frequency point is found in Full Band 4 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency point is found in the Full Band 4 of PLMN-B, continue to search for the remaining PLMNs according to the priority order determined in S1204 above. It is determined that no frequencies are found in the remaining PLMN's historical resident frequencies, and when no frequencies are found in the Full Band of the remaining PLMNs, OOS is entered.

Using the above technical solution, in the prior art, when the UE is in the above scenarios 1, 2, 3 and 4, when the UE performs a search in the Full Band of each standard of the PLMN, the process will occupy a large amount of cell search time. For this reason, in the cell search method provided in the embodiment of the present application, when it is determined that the HPLMN is a predefined PLMN, and it is determined that the information of the RPLMN is not stored, after the UE searches the historical dwell frequency points of each mode of a PLMN, if it is determined When no frequency is found in the historical resident frequency points of each system of the PLMN, there is no need to search in the Full Band of each system of the PLMN, but directly switch to the searched PLMN for search. When it is determined that no frequency points are searched in the historical resident frequency points of each standard of each other PLMN, the search is performed on the Full Band of each standard of each PLMN, thereby saving the cell search occupied by handover PLMNs length of time.

FIG. 13 is a schematic flowchart of a cell search method provided by an embodiment of the present application. The cell search method is used to solve the problem that the UE takes a long time to perform cell search in the above scenarios 1, 2, 3 and 4. As shown in Figure 13, the method may include:

S1301. The UE determines that the HPLMN is a predefined PLMN.

S11. The UE determines that the information of the RPLMN is stored, and executes S12.

S12 , the UE searches for the historical dwell frequency point (for example, referred to as the historical dwell frequency point 1 ) under the first mode of the RPLMN. If a frequency point is searched under the historical residence frequency point 1 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency is found under the historical resident frequency 1 of the RPLMN, perform S13.

S13, the UE searches for the historical dwell frequency point of the second standard in the RPLMN (for example, referred to as the historical dwell frequency point 2). If a frequency point is searched under the historical residence frequency point 2 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 .

Among them, in the scenario 1-scenario 4 corresponding to FIG. 4-FIG. 7, when the UE performs a search in the Full Band of each standard of a PLMN, the process will occupy a large amount of cell search time. Therefore, in the embodiment of the present application, in the above scenarios 1 to 4, when the UE performs cell search, it first searches for the historical residency frequency points of each system of each PLMN. When no frequency is searched under the historical resident frequency point of each system of each PLMN, the UE searches again under the Full Band of each system of each PLMN. When no frequency point is searched under the Full Band of each standard of each PLMN, it switches to the searched PLMN for search, thereby shortening the time used by the UE to perform cell search.

Exemplarily, taking the first cell as the co-constructed cell 103 and the second cell as the other cell 102 as an example, in combination with the scenario 1 shown in FIG. 3 and FIG. 4 , the carrier to which the SIM card used by the UE belongs is radio and television, The HPLMN stored by the UE is 46015. Since the co-constructed cell 103 is a 5G network device jointly deployed by radio, television and China Mobile, when the UE is in the co-constructed cell 103, the broadcast message (such as MIB signaling) acquired by the network device will be parsed as 46000 PLMN and 46015 PLMN. Since the co-deployed network device does not support roaming access, when the UE requests to access the co-established cell 103, it needs to search for 46015, so that when it searches for a frequency point under the 46015, it can pass the frequency point. The registration information is sent to the network device corresponding to the co-established cell 103 . When the UE turns off after successfully camping on the co-established cell 103 and moves to another cell 102 to turn on, the UE determines that the RPLMN is stored (46015). At this time, the UE needs to search for the historical camping frequency points of each standard of 46015 in other cells 102. If no frequency is found in the historical camping frequency points of each standard of 46015, the UE is in the searched PLMN. Search at the historical dwell frequency of each system. If the historical resident frequency points of each system of the searched PLMN are the searched frequency points (such as frequency point B), the UE searches the Full Band of each system of the RPLMN. If it is determined that no frequency points are searched under the Full Band of each standard of the RPLMN, the UE searches under the Full Band of each standard of the searched PLMN.

If no frequency is found under the historical resident frequency 2 of the RPLMN, perform S15.

If no frequency point is searched under the historical residence frequency point 2 of the RPLMN, the UE will sort the currently searched PLMNs according to the pre-configured PLMN priority search order to determine the priority order of each currently searched PLMN , and search under each PLMN in turn according to the priority order. For example, if PLMN-B is the PLMN with the highest priority among the currently searched PLMNs, then no frequency point is searched under the historical residence frequency point 2 of the RPLMN. , the UE switches to the PLMN-B for searching, that is, executes S15 and S16 shown in FIG. 2 .

S15: The UE searches for the historical dwell frequency point of the first system of the PLMN-B (for example, it becomes the historical dwell frequency point 3). If the frequency point is searched under the historical resident frequency point 3 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency point is searched under the historical resident frequency point 3 of the PLMN-B, perform S16.

It should be noted that the RPLMN stored in the card file of the SIM card in S1301 is different from the PLMN-B.

S16. The UE searches for the historical dwell frequency point of the second standard of PLMN-B (for example, it becomes the historical dwell frequency point 4). If a frequency point is searched in the historical resident frequency point 4 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency is found in the historical dwell frequency 4 of the PLMN-B, and no frequency is found in the historical dwell frequency 4 of the EPLMN, then perform S14.

S14. The UE searches for the Full Band (for example, called Full Band1) of the first standard under the RPLMN.

If a frequency point is found under Full Band1 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 . If no frequency point is found in the Full Band 1 of the RPLMN, then the Full Band of the second standard of the RPLMN (for example, called Full Band 2) is searched. If a frequency point is searched under Full Band2 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 . If no frequency point is found in the Full Band2 of the RPLMN, perform S17.

S17: The UE searches for the Full Band (for example, called Full Band 3) of the first standard of the PLMN-B.

If a frequency point is found in Full Band 3 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If the frequency point is not searched in the Full Band 3 of PLMN-B, then search in the Full Band (for example, called Full Band 4) of the second standard of PLMN-B.

If a frequency point is found in Full Band 4 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency point is found in the Full Band 4 of PLMN-B, continue to search for the remaining PLMNs according to the priority order determined in S13 above. It is determined that no frequencies are found in the remaining PLMN's historical resident frequencies, and when no frequencies are found in the Full Band of the remaining PLMNs, OOS is entered.

Using the above technical solution, in the prior art, when the UE is in the above scenarios 1, 2, 3 and 4, when the UE performs a search in the Full Band of each standard of the PLMN, the process will occupy a large amount of cell search time. For this reason, in the cell search method provided in the embodiments of the present application, when it is determined that the HPLMN is a predefined PLMN, and when it is determined that the information of the RPLMN is stored in the card file of the SIM card, the UE performs the search at the historical resident frequency of each system of a PLMN. After the search, if it is determined that no frequency points are found in the historical resident frequency points of each system of the PLMN, there is no need to search on the FullBand of each system of the PLMN, but directly switch to the searched PLMN. search. When it is determined that no frequency points are searched in the historical resident frequency points of each system of each other PLMN, the search is performed again in the Full Band of each system of each PLMN, so as to save the cell search occupied by handover PLMNs length of time.

FIG. 14 is a schematic flowchart of a cell search method provided by an embodiment of the present application. The cell search method is used to solve the problem that the UE takes a long time to perform cell search in the above scenarios 1, 2, 3 and 4. As shown in Figure 14, the method may include:

S1401. The UE determines that the HPLMN is a predefined PLMN.

S1402. The UE adds the EPLMN in the second system.

S1403. The UE determines that the information of the RPLMN is not stored.

It should be noted that the implementation principle of the foregoing S1403 is similar to the implementation principle of the S1202 shown in FIG. 12 in the foregoing embodiment, and details are not described herein again.

S1404, the UE searches for the historical dwell frequency point (for example, referred to as the historical dwell frequency point 5) under the first standard of the HPLMN. If a frequency point is searched under the historical residence frequency point 5 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency is found under the historical resident frequency 5 of the RPLMN, S1405 is executed.

S1405 , the UE searches for the historical dwell frequency point of the second standard of the HPLMN (for example, referred to as the historical dwell frequency point 6 ). If a frequency point is searched under the historical resident frequency point 6 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. Alternatively, if a frequency point is searched under the historical residence frequency point 6 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 . If no frequency point is found under the historical resident frequency point 6 of the HPLMN, perform S1406.

S1406, the UE searches for the Full Band (for example, called Full Band 5) of the first standard under the HPLMN. If a frequency point is searched under Full Band 5 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 . If no frequency point is found in the Full Band 5 of the HPLMN, the UE searches the Full Band of the second standard of the HPLMN (for example, called Full Band 6). If a frequency point is searched under Full Band 6 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 . Or, if a frequency point is searched under Full Band 6 of the EPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 . If no frequency point is searched under Full Band6 of HPLMN, and no frequency point is searched under Full Band6 of EPLMN, perform S15 as shown in FIG. 2 .

It should be noted that the implementation manner of S1404-S1406 is similar to the corresponding implementation process in the above-mentioned S12-S14, and details are not repeated here.

If no frequency point is searched under the historical resident frequency point 6 of the HPLMN, the UE will sort the currently searched PLMNs according to the pre-configured PLMN priority search order to determine the priority order of each currently searched PLMN , and search under each PLMN in turn according to the priority order. For example, if PLMN-B is the PLMN with the highest priority among the currently searched PLMNs, no frequency point is searched under the historical resident frequency point 6 of the HPLMN. , the UE switches to PLMN-B for searching, that is, performs S15 shown in FIG. 2 .

S15: The UE searches for the historical dwell frequency point of the first system of the PLMN-B (for example, it becomes the historical dwell frequency point 3). If the frequency point is searched under the historical resident frequency point 3 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency point is searched under the historical resident frequency point 3 of the PLMN-B, perform S1407.

It should be noted that the RPLMN stored in the card file of the SIM card in S1301 is different from the PLMN-B.

S1407, the UE searches for the historical dwell frequency point of the second standard of the PLMN-B (for example, it becomes the historical dwell frequency point 4). If a frequency point is searched in the historical resident frequency point 4 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 . Alternatively, if a frequency point is found in the historical residence frequency point 4 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency is found in the historical dwelling frequency 4 of the PLMN-B, and no frequency is found in the historical dwelling frequency 4 of the EPLMN, perform S1408.

S1408, the UE searches for the Full Band (for example, called Full Band 3) of the first standard of the PLMN-B.

If a frequency point is found in Full Band 3 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency point is found in Full Band 3 of PLMN-B, then search the Full Band of the second standard of PLMN-B (for example, called Full Band 4).

If a frequency point is found in Full Band 4 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 . Alternatively, if a frequency point is found in Full Band 4 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point, for example, the UE sends the registration information to the network device 2 .

If no frequency is found in Full Band 4 of PLMN-B, and no frequency is found in Full Band 4 of EPLMN, the search for the remaining PLMNs is continued according to the priority order determined in S1406 above. It is determined that no frequency points are found in the remaining PLMN's historical resident frequency points, and when no frequency points are searched in the Full Band of the remaining PLMNs, enter OOS.

Specifically, the predefined PLMN, EPLMN and PLMN-B are all different.

The above example is that when a PLMN is searched for cells, even if the frequency points in the historical resident frequency points of the EPLMN are searched, the UE cannot immediately initiate registration with the network device, but determines the history of any standard in the PLMN. When no frequency is found in the camping frequency, the UE searches again under the Full Band of each standard of the PLMN. When no frequency point is searched under the Full Band of each standard of the PLMN, it is only switched to the searched PLMN for searching as an example to illustrate. Because when the UE searches in the Full Band of each standard of the PLMN, the process will take up a lot of time for cell search, and when the UE searches in a PLMN, even if it searches for the frequency in the historically resident frequency points of the EPLMN At this point, the UE cannot immediately initiate registration with the network device. Therefore, in some other embodiments of the present application, by adding the EPLMN of the second standard, for example, when the UE searches under one PLMN, it first searches the historical residence frequency points of each standard of each PLMN. If the frequency points in the historical resident frequency points of the second standard of the EPLMN are searched, the UE can immediately initiate registration with the network device. If no frequency is searched under the historical resident frequency point of each system of each PLMN, the UE searches again under the Full Band of each system of each PLMN. When the frequency point is not searched under the Full Band of each standard of each PLMN, it switches to the searched PLMN for searching, so that the time used by the UE to perform cell search can be shortened.

For example, with reference to FIG. 14 , after performing S1401-S1405 shown in FIG. 14 in the foregoing embodiment, the UE determines that no frequency has been searched under the historical dwell frequency 6 of the HPLMN, and the historical dwell frequency of the EPLMN is not found. If no frequency point is found under point 6, S15 and S16 shown in FIG. 2 in the foregoing embodiment are performed. Therefore, the UE does not need to perform the aforementioned procedure without having to perform S1406 as shown in FIG. 14 in the foregoing embodiment and determine that no frequency point has been searched under the Full Band 6 of the HPLMN, and no frequency point has been searched under the Full Band 6 of the EPLMN. In the embodiment, S15 and S16 are shown in FIG. 2 . Therefore, the process of searching in the Full Band of each standard of the PLMN, which takes up a large amount of cell search time, can be skipped, and the time for the UE to switch PLMNs during cell search is shortened. When no frequency point is searched in the historical dwell frequency point 4 of the PLMN-B, and no frequency point is searched under the historical dwell frequency point 4 of the EPLMN, perform S1406 and S1406 shown in FIG. 14 in the foregoing embodiment and In the foregoing embodiment, as shown in S17 in FIG. 2 , the time period for the UE to perform cell search can be shortened.

Using the above technical solution, in the prior art, when the UE is in any one of the above scenarios 1, 2, 3 and 4, when the UE searches under a PLMN, even if it searches for the historical residency frequency of the EPLMN The UE cannot immediately initiate registration with the network device, that is, the UE must determine that when no frequency is found in the historical resident frequency of any standard of the PLMN, and after switching to the EPLMN, it searches for the EPLMN again. Only when the frequency points in the frequency points in the history reside, the registration to the network device can be initiated at this time. For this reason, in the cell search method provided by the embodiments of the present application, when the UE determines that the HPLMN is a predefined PLMN, and determines that the information of the RPLMN is not stored, the UE adds the EPLMN of the second standard, such as the UE's historical registration of the second standard of the HPLMN. When searching for a reserved frequency point, if a frequency point in the historical resident frequency point of the EPLMN is searched, the UE immediately initiates registration with the network device, and it is not necessary for the UE to determine that it is not in the historical resident frequency point of any standard of the HPLMN. When the frequency point is searched and switched to the EPLMN, the registration can be initiated to the network device only when the frequency point in the historical resident frequency points of the EPLMN is searched again, which can save the time for cell search occupied by the handover PLMN.

FIG. 15 is a schematic flowchart of a cell search method provided by an embodiment of the present application. The cell search method is used to solve the problem that the UE performs a cell search in the above scenarios 1, 2, 3, 4 and 5 in a relatively long time.

As shown in Figure 15, the method may include:

S1501. The UE determines that the HPLMN is a predefined PLMN.

S1502. The UE determines that the EPLMN is the FPLMN of the first standard.

S11. The UE determines that the information of the RPLMN is stored.

S12 , the UE searches for the historical dwell frequency point (for example, referred to as the historical dwell frequency point 1 ) under the first mode of the RPLMN. If a frequency point is searched under the historical residence frequency point 1 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency is found under the historical resident frequency 1 of the RPLMN, perform S13.

S13, the UE searches for the historical dwell frequency point of the second standard in the RPLMN (for example, referred to as the historical dwell frequency point 2). If a frequency point is searched under the historical residence frequency point 2 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 .

If no frequency point is searched under the historical residence frequency point 2 of the RPLMN, perform S14.

S14. The UE searches for the Full Band (for example, called Full Band1) of the first standard under the RPLMN.

If a frequency point is found under Full Band1 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency point is found in the Full Band 1 of the RPLMN, then search the Full Band of the second standard of the RPLMN (for example, called Full Band 2). If a frequency point is searched under Full Band2 of the RPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 .

Wherein, when the EPLMN of the UE is PLMN-B, the UE determines that the EPLMN is the FPLMN of the first standard. Therefore, when the UE searches under the historical dwelling frequency of each PLMN-B system, it does not need to search for the frequency under the historical dwelling frequency of the first system of PLMN-B, that is, it does not need to perform the steps as in the foregoing embodiment. In S15 shown in FIG. 2, S16 is directly executed. Therefore, the cell search time occupied by the UE searching for the frequency points under the historical camping frequency points of the first standard of the PLMN-B can be saved.

Exemplarily, taking the first cell as the co-constructed cell 103 and the second cell as the other cell 102 as an example, in combination with the scenario 1 shown in FIG. 3 and FIG. 4 , the carrier to which the SIM card used by the UE belongs is radio and television, The HPLMN stored by the UE is 46015. And because the network equipment of 5G is jointly deployed by the radio and television and the mobile, and the network equipment of the mobile is rented by the radio and television with the network standard of 4G, so that the users of the radio and television are not covered by the network equipment deployed by the radio and television, but are independently deployed in the mobile. When the coverage of the network equipment is within the coverage area, the users of the radio and television can access the network equipment independently deployed by the mobile through roaming. Therefore, in this embodiment of the present application, it is determined that the mobile 46000 is the EPLMN of 46015 under 4G. At the same time, because the network devices of other cell 102 pairs only provide the 4G frequency of 46000, but do not provide the 5G frequency of 46000. Therefore, in the embodiment of the present application, it is determined that the mobile 46000 is the FPLMN of 46015 under 5G. Since the co-constructed cell 103 is a 5G network device jointly deployed by radio, television and China Mobile, when the UE is in the co-constructed cell 103, the broadcast message (such as MIB signaling) acquired by the network device will be parsed as 46015 PLMN, and 46000 PLMN. At this time, when the UE requests to access the co-constructed cell 103, it needs to search for 46015, so when a frequency point is searched under the 46015, it can send registration information to the network device corresponding to the co-constructed cell 103 through the frequency point. When the UE is powered off after successfully camping in the co-constructed cell 103 and moves to another cell 102 to power on, the RPLMN information stored by the UE at this time is 46015, and the network standard of the other cell 102 is corresponding to the 4G network equipment deployed independently. community. The UE determines that the RPLMN is stored (46015), so the UE needs to search for the historical camping frequency points of each standard of 46015 in other cells 102, or to search for the FullBand of each standard of 46015. Since the PLMN of the corresponding network equipment in other cells 102 is 46000, that is, other cells 102 only provide 4G frequencies (eg, frequency B) whose PLMN is 46000, so the UE cannot stay on the historical frequency of any standard of 46015. The frequency point (such as frequency point A) is searched in the point, and the UE cannot search for the frequency point (such as frequency point A) in the Full Band of any standard of 46015. At this time, when the UE searches for 46000, it does not need to search the historical resident frequency of 46000 5G, but directly searches for the historical resident frequency of 46000 4G. When a frequency point is found in the search, the registration information is sent to the network device corresponding to the frequency point. Therefore, the time for cell search occupied by the UE in the 46000 5G historical camping frequency points can be saved.

It should be noted that, in the scenarios 2, 3 and 4 shown in Figure 5 to Figure 7, when the UE searches under the EPLMN, it is not necessary to search at the historical resident frequency points of the first system of the EPLMN. The process of the above-mentioned UE in scenario 1 is similar, and details are not repeated here.

If no frequency point is found in the Full Band2 of the RPLMN, perform S16.

If no frequency point is searched under Full Band 2 of RPLMN, the UE will search in sequence according to the priority order of each PLMN currently searched. If it is determined that PLMN-B has the highest priority, it will switch to PLMN-B. search.

It should be noted that the PLMN indicated by the information of the RPLMN stored in the card file of the SIM card in S11 is different from the PLMN-B.

S16. The UE searches for the historical dwell frequency point of the second standard of PLMN-B (for example, it becomes the historical dwell frequency point 4). If a frequency point is searched in the historical resident frequency point 4 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency point is searched in the historical resident frequency point 4 of the PLMN-B, perform S17.

S17: The UE searches for the Full Band (for example, called Full Band 3) of the first standard of the PLMN-B.

If a frequency point is found in Full Band 3 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If the frequency point is not searched in the Full Band 3 of PLMN-B, then search in the Full Band (for example, called Full Band 4) of the second standard of PLMN-B.

If a frequency point is found in Full Band 4 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency point is found in the Full Band 4 of PLMN-B, continue to search for the remaining PLMNs according to the priority order determined in S1004 above. It is determined that in the remaining PLMN, when no frequency point is found, enter OOS.

The above example is that when a PLMN is searched for a cell, the search is first performed under the historical dwelling frequency of any standard of the PLMN, and no frequency is found in the historical dwelling frequency of any standard of the PLMN. When , the UE searches again under the Full Band of each standard of the PLMN. When no frequency point is searched under the Full Band of each standard of the PLMN, the search is performed by switching to the searched PLMN as an example to illustrate. Since the UE searches in the Full Band of each standard of the PLMN, this process will occupy a large amount of time for cell search. Therefore, in some other embodiments of the present application, when the UE searches under one PLMN, it first searches under the historical residence frequency points of each system of each PLMN. If no frequency is searched under the historically resident frequency of each PLMN of each system, the UE searches again under the Full Band of each system of each PLMN. When no frequency point is searched under the Full Band of each standard of each PLMN, it switches to the searched PLMN for searching, thereby shortening the time for the UE to perform cell search.

For example, referring to FIG. 15 , after performing S1501-S13 shown in FIG. 15 in the foregoing embodiment, the UE determines that no frequency point is searched under the historical residency frequency point 2 of the RPLMN, and then executes the operation shown in FIG. 2 in the foregoing embodiment. shown in S16. Therefore, after performing S14 shown in FIG. 2 in the foregoing embodiment, the UE does not need to determine that no frequency point has been searched under Full Band 2 of the RPLMN, and then executes S16 shown in FIG. 2 in the foregoing embodiment, so that it can occupy The process of searching in the Full Band of each standard of the PLMN for the duration of a large number of cell searches shortens the duration for the UE to switch PLMNs during cell search. At the same time, since it is unnecessary to perform S15 shown in FIG. 2 in the foregoing embodiment, the duration of cell search occupied by S15 can be further omitted. When no frequency point is searched in the historical resident frequency point 4 of the PLMN-B, S17 as shown in FIG. 2 in the foregoing embodiment is performed, thereby shortening the time for the UE to perform cell search.

With the above technical solution, in the prior art, when the UE is in any of the above scenarios 1, 2, 3, 4 and 5, the UE needs to perform cell search according to the process shown in FIG. 1 . For this reason, in the cell search method provided by the embodiments of the present application, the UE determines that the EPLMN is the FPLMN of the first standard, so when searching under the EPLMN, it does not need to search under the historical residence frequency of the first standard of the EPLMN, so as to The cell search time occupied by the UE searching for the frequency points under the historical camping frequency points of the first standard of PLMN-B can be saved, and the total time occupied by the UE for cell search can be shortened.

FIG. 16 is a schematic flowchart of a cell search method provided by an embodiment of the present application. The cell search method is used to solve the problem that the UE performs a cell search in the above scenarios 1, 2, 3, 4 and 5 in a relatively long time.

As shown in Figure 16, the method may include:

S1601. The UE determines that the HPLMN is a predefined PLMN.

S1602. The UE determines that the EPLMN is the FPLMN of the first standard.

S1603. The UE determines that the information of the RPLMN is not stored.

S1604, the UE searches for the historical dwell frequency point (for example, referred to as the historical dwell frequency point 5) under the first system of the HPLMN. If a frequency point is searched under the historical residence frequency point 5 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency is found under the historical resident frequency 5 of the RPLMN, perform S1605.

S1605, the UE searches for the historical dwell frequency point of the second standard of the HPLMN (for example, referred to as the historical dwell frequency point 6). If a frequency point is searched under the historical resident frequency point 6 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 .

If no frequency is found under the historical resident frequency 6 of the HPLMN, S1606 is executed.

S1606, the UE searches for the Full Band (for example, called Full Band 5) of the first standard under the HPLMN. If a frequency point is searched under Full Band 5 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 . If no frequency point is found in the Full Band 5 of the HPLMN, the UE searches the Full Band of the second standard of the HPLMN (for example, called Full Band 6). If a frequency point is searched under Full Band 6 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 .

Wherein, when the EPLMN of the UE is PLMN-B, the UE determines that the EPLMN is the FPLMN of the first standard. Therefore, when the UE searches under the historical dwelling frequency of each PLMN-B system, it does not need to search for the frequency under the historical dwelling frequency of the first system of PLMN-B, that is, it does not need to perform the steps as in the foregoing embodiment. In S15 shown in FIG. 2, S16 is directly executed. Therefore, the cell search time occupied by the UE searching for the frequency points under the historical camping frequency points of the first standard of the PLMN-B can be saved.

Exemplarily, taking the first cell as the co-constructed cell 103 and the second cell as the other cell 102 as an example, in combination with the scenario 1 shown in FIG. 3 and FIG. 4 , the carrier to which the SIM card used by the UE belongs is radio and television, The HPLMN stored by the UE is 46015. And because the network equipment of 5G is jointly deployed by the radio and television and the mobile, and the network equipment of the mobile is rented by the radio and television with the network standard of 4G, so that the users of the radio and television are not covered by the network equipment deployed by the radio and television, but are independently deployed in the mobile. When the coverage of the network equipment is within the coverage area, the users of the radio and television can access the network equipment independently deployed by the mobile through roaming. Therefore, in this embodiment of the present application, it is determined that the mobile 46000 is the EPLMN of 46015 under 4G. At the same time, because the network devices of other cell 102 pairs only provide the 4G frequency of 46000, but do not provide the 5G frequency of 46000. Therefore, in the embodiment of the present application, it is determined that the mobile 46000 is the FPLMN of 46015 under 5G. Since the co-constructed cell 103 is a 5G network device jointly deployed by radio, television and China Mobile, when the UE is in the co-constructed cell 103, the broadcast message (such as MIB signaling) acquired by the network device will be parsed as 46015 PLMN, and 46000 PLMN. At this time, when the UE requests to access the co-constructed cell 103, it needs to search for 46015, so when a frequency point is searched under the 46015, it can send registration information to the network device corresponding to the co-constructed cell 103 through the frequency point. When the UE is powered off after successfully camping in the co-constructed cell 103 and moves to another cell 102 to power on, the RPLMN information stored by the UE at this time is 46015, and the network standard of the other cell 102 is corresponding to the 4G network equipment deployed independently. community. The UE determines that the RPLMN is stored (46015), so the UE needs to search for the historical camping frequency points of each standard of 46015 in other cells 102, or to search for the FullBand of each standard of 46015. Since the PLMN of the corresponding network equipment in other cells 102 is 46000, that is, other cells 102 only provide 4G frequencies (eg, frequency B) whose PLMN is 46000, so the UE cannot stay on the historical frequency of any standard of 46015. The frequency point (such as frequency point A) is searched in the point, and the UE cannot search for the frequency point (such as frequency point A) in the Full Band of any standard of 46015. At this time, when the UE searches for 46000, it does not need to search the historical resident frequency of 46000 5G, but directly searches for the historical resident frequency of 46000 4G. When a frequency point is found in the search, the registration information is sent to the network device corresponding to the frequency point. Therefore, the time for cell search occupied by the UE in the 46000 5G historical camping frequency points can be saved.

It should be noted that, in the scenarios 2, 3 and 4 shown in Figure 5 to Figure 7, when the UE searches under the EPLMN, it is not necessary to search at the historical resident frequency points of the first system of the EPLMN. The process of the above-mentioned UE in scenario 1 is similar, and details are not repeated here.

If no frequency point is found under Full Band 6 of HPLMN, perform S16.

If no frequency point is searched under Full Band 6 of HPLMN, the UE will sort the currently searched PLMNs according to the pre-configured PLMN priority search order to determine the priority order of each currently searched PLMN, and according to this The priority order is searched under each PLMN in turn. For example, if PLMN-B is the PLMN with the highest priority among the currently searched PLMNs, the frequency point is not searched under Full Band6 of HPLMN, and the UE switches to PLMN-B. A search is performed, that is, S16 shown in FIG. 2 is performed.

S16. The UE searches for the historical dwell frequency point of the second standard of PLMN-B (for example, it becomes the historical dwell frequency point 4). If a frequency point is searched in the historical resident frequency point 4 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency point is searched in the historical resident frequency point 4 of the PLMN-B, perform S17.

S17: The UE searches for the Full Band (for example, called Full Band 3) of the first standard of the PLMN-B.

If a frequency point is found in Full Band 3 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If the frequency point is not searched in the Full Band 3 of PLMN-B, then search in the Full Band (for example, called Full Band 4) of the second standard of PLMN-B.

If a frequency point is found in Full Band 4 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency point is found in the Full Band 4 of PLMN-B, the search for the remaining PLMNs is continued according to the priority order determined in S1606. It is determined that in the remaining PLMN, when no frequency point is found, enter OOS.

The above example is that when a PLMN is searched for a cell, the search is first performed under the historical dwelling frequency of any standard of the PLMN, and no frequency is found in the historical dwelling frequency of any standard of the PLMN. When , the UE searches again under the Full Band of each standard of the PLMN. When no frequency point is searched under the Full Band of each standard of the PLMN, the search is performed by switching to the searched PLMN as an example to illustrate. Since the UE searches in the Full Band of each standard of the PLMN, this process will occupy a large amount of time for cell search. Therefore, in some other embodiments of the present application, when the UE searches under one PLMN, it first searches under the historical residence frequency points of each system of each PLMN. If no frequency is searched under the historically resident frequency of each PLMN of each system, the UE searches again under the Full Band of each system of each PLMN. When no frequency point is searched under the Full Band of each standard of each PLMN, it switches to the searched PLMN for searching, thereby shortening the time for the UE to perform cell search.

For example, with reference to FIG. 16 , after performing S1601-S1604 shown in FIG. 16 in the foregoing embodiment, the UE determines that no frequency point has been searched under the historical resident frequency point 6 of the HPLMN, and executes the operation shown in the foregoing embodiment as shown in FIG. 16 . 2 shown in S16. Therefore, the UE does not need to perform S16 in the foregoing embodiment as shown in FIG. 2 after determining that no frequency point has been searched under the Full Band 6 of the HPLMN after performing S1605 shown in FIG. 2 in the foregoing embodiment, so that a large amount of The process of searching in the Full Band of each standard of the PLMN according to the duration of the cell search shortens the duration for the UE to switch the PLMN during the cell search. At the same time, since it is unnecessary to perform S15 shown in FIG. 2 in the foregoing embodiment, the duration of cell search occupied by S15 can be further omitted. When no frequency point is searched in the historical resident frequency point 4 of the PLMN-B, S17 as shown in FIG. 2 in the foregoing embodiment is performed, thereby shortening the time for the UE to perform cell search.

With the above technical solution, in the prior art, when the UE is in any of the above scenarios 1, 2, 3, 4 and 5, the UE needs to perform cell search according to the process shown in FIG. 1 . For this reason, in the cell search method provided by the embodiments of the present application, the UE determines that the EPLMN is the FPLMN of the first standard, so when searching under the EPLMN, it does not need to search under the historical residence frequency of the first standard of the EPLMN, so as to The cell search time occupied by the UE searching for the frequency points under the historical camping frequency points of the first standard of PLMN-B can be saved, and the total time occupied by the UE for cell search can be shortened.

FIG. 17 is a schematic flowchart of a cell search method provided by an embodiment of the present application. The cell search method is used to solve the problem that the UE performs a cell search in the above scenarios 1, 2, 3, 4 and 5 in a relatively long time.

As shown in Figure 17, the method may include:

S1701. The UE determines that the HPLMN is a predefined PLMN.

S1702. The UE determines that the EPLMN is the FPLMN of the first standard, and adds the EPLMN of the second standard.

S11. The UE determines that the information of the RPLMN is stored.

S1703 , the UE searches for the historical dwell frequency point (for example, referred to as the historical dwell frequency point 5 ) under the first standard of the HPLMN. If a frequency point is searched under the historical residence frequency point 5 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency is found under the historical resident frequency 5 of the RPLMN, perform S1704.

S1704 , the UE searches for the historical dwell frequency point of the second standard of the HPLMN (for example, referred to as the historical dwell frequency point 6 ). If a frequency point is searched under the historical resident frequency point 6 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 . Alternatively, if a frequency point is searched under the historical residence frequency point 6 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency point is searched under the historical dwell frequency point 6 of the HPLMN, and no frequency point is searched under the historical dwell frequency point 6 of the EPLMN, perform S16.

If no frequency is searched under the historical dwelling frequency 6 of the HPLMN, and no frequency is found under the historical dwelling frequency 6 of the EPLMN, the UE will search the currently searched PLMN according to the pre-configured PLMN first. Sort by order to determine the priority order of each PLMN currently searched, and search under each PLMN in turn according to the priority order. For example, PLMN-B is the PLMN with the highest priority among the currently searched PLMNs , then no frequency point is searched under the historical residence frequency point 6 of HPLMN, and no frequency point is searched under the historical residence frequency point 6 of EPLMN, and the UE switches to PLMN-B to search, that is, execute the process in FIG. 2 . shown in S16.

S16. The UE searches for the historical dwell frequency point of the second standard of PLMN-B (for example, it becomes the historical dwell frequency point 4). If a frequency point is searched in the historical resident frequency point 4 of the PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 . Or, if a frequency point is searched in the historical residence frequency point 4 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency is found in the historical resident frequency 4 of the PLMN-B, S1705 is executed.

S1705, the UE searches for the Full Band (for example, called Full Band 5) of the first standard under the HPLMN. If a frequency point is searched under Full Band 5 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 . If the frequency point is not searched under the Full Band 5 of the HPLMN, the UE searches again in the Full Band (for example, called Full Band 6) of the second standard of the HPLMN. If a frequency point is searched under Full Band 6 of the HPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. Or, if a frequency point is searched under Full Band 6 of the EPLMN, the UE sends registration information to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 1 . If no frequency point is searched under Full Band 6 of HPLMN, and no frequency point is searched under Full Band 6 of EPLMN, perform S1706.

S1706, the UE searches for the Full Band (for example, called Full Band 3) of the first standard of the PLMN-B.

If a frequency point is found in Full Band 3 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If the frequency point is not searched in the Full Band 3 of PLMN-B, then search in the Full Band (for example, called Full Band 4) of the second standard of PLMN-B.

If a frequency point is found in Full Band 4 of PLMN-B, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 . Or if a frequency point is found in Full Band 4 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency is found in Full Band 4 of PLMN-B, and no frequency is found in Full Band 4 of EPLMN, continue to search for the remaining PLMNs according to the priority order determined in 1704 above. It is determined that no frequency points are found in the remaining PLMN's historical resident frequency points, and when no frequency points are searched in the Full Band of the remaining PLMNs, enter OOS.

It should be noted that, after the UE determines that the HPLMN is the predefined PLMN, the UE determines that the EPLMN is the FPLMN of the first standard, and adds the EPLMN of the second standard. At this time, if the UE determines that the information of the RPLMN is not stored, the UE continues to perform the processes from S1703 to S1706 as shown in FIG. 17 , which will not be repeated here.

Because the UE cannot determine which scene the current scene is in is the above scene 1, scene 2, scene 3, scene 4 and scene 5. Therefore, in the cell search method provided by the embodiments of the present application, when it is determined that the HPLMN is a predefined PLMN, and the information of the RPLMN is stored in the card file of the SIM card, the search is performed directly under the HPLMN, which saves the time occupied by the search under the RPLMN. The duration of the cell search. Further, by adding the EPLMN under the second system, when the UE searches under the historical residence frequency point of each system of each PLMN, if the frequency in the historical residence frequency point of any system of the EPLMN is searched, point, the UE can directly send the registration information to the network device corresponding to the frequency point. And the UE determines that the EPLMN is the FPLMN of the first standard, so that the UE does not need to search under the historical dwelling frequency of the first standard of EPLMN, thereby saving the UE from searching under the historical dwelling frequency of the first standard of PLMN-B The duration of cell search occupied by the frequency point shortens the total duration of cell search occupied by the UE. Finally, since the UE searches in the Full Band of each standard of a PLMN, this process will take up a large amount of time for cell search. Therefore, in some other embodiments of the present application, when the UE searches under one PLMN, it first searches under the historical residence frequency points of each system of each PLMN. If no frequency is searched under the historical resident frequency point of each system of each PLMN, the UE searches again under the Full Band of each system of each PLMN. When no frequency point is searched under the Full Band of each standard of each PLMN, it switches to the searched PLMN for search, thereby shortening the time used by the UE to perform cell search.

In some other embodiments of the present application, when the UE successfully camps on the cell of the network device, a service interruption fault will occur. Attempt to restore service. To this end, the cell search process provided by the related art, as shown in Figure 18, may specifically include:

S1801. The UE performs the first operation N times in a loop, where N is an integer greater than or equal to 0.

Wherein, the first operation is to search under the historical dwell frequency of the first system of the HPLMN.

If a frequency point is searched under the historical resident frequency point of the first system of the HPLMN, the registration information is sent to the network device corresponding to the frequency point. For example, the registration information is sent to the network device 3 .

If after performing the first operation N times in a loop, no frequency is found under the historical dwell frequency of the first system of the HPLMN, then execute S1802.

S1802, the UE performs the second operation M times in a loop, where M is an integer greater than or equal to 0.

Wherein, the second operation is to search under the Full Band of the first standard of HPLMN.

If a frequency point is searched under the Full Band of the first standard of HPLMN, the registration information is sent to the network device corresponding to the frequency point. For example, the registration information is sent to the network device 3 .

If no frequency point is found under the Full Band of the first system of the HPLMN after the second operation is performed in a loop M times, S1803 is performed.

S1803. The UE searches under the historical dwell frequency points of each mode of other PLMNs. If no frequency is searched under the historical dwell frequency points of each mode of other PLMNs, the UE searches for each mode in other PLMNs. Search under a standard Full Band. If no frequency is found under the Full Band of each standard of the other PLMN, S1801 is executed.

If a frequency point is found under the historical resident frequency point of each standard of other PLMNs, or when a frequency point is searched under the Full Band of each standard of other PLMN, S1804 is performed.

S1804. Determine the network selection list according to the frequency points searched under the historical resident frequency points of each system of other PLMNs, and the frequency points searched under the Full Band of each system of other PLMNs.

It should be noted that, in the cell search process provided in this embodiment of the present application, the above-mentioned technical solutions shown in Figs. For the PLMN searched during the RPLHN or HPLNM search, the technical solution shown in Figure 13 or Figure 14 can be implemented.

FIG. 19 is a schematic flowchart of a cell search method provided by an embodiment of the present application. The cell search method is used to solve the situation as shown in FIG. 20 (for example, in FIG. 20 when the UE restores service in other cells 102, that is, the UE accesses other cells to restore service), the time required for the UE to perform cell search is relatively long. The problem. As shown in Figure 19, the method may include:

S1901, the UE repeats the third operation n times. Wherein, n is an integer greater than or equal to 0.

Wherein, the third operation includes: searching under the historical resident frequency point of the first system of the HPLMN (such as called the historical resident frequency point 5), if the frequency point is searched under the historical resident frequency point 5 of the HPLMN, Then, the registration information is sent to the network device of the cell corresponding to the frequency point.

If a frequency point is searched under the historical residence frequency point 5 of the HPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 3 .

If no frequency is found in the historical dwell frequency 5 of the HPLMN, the UE searches for the historical dwell frequency (eg, called the historical dwell frequency 7 ) under the second standard of the EPLMN.

If a frequency point is searched under the historical resident frequency point 7 of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the UE sends registration information to the network device 2 .

If no frequency is found under the historical dwell frequency 7 of the EPLMN, the search continues under the historical dwell frequency of the first system of the HPLMN.

If after performing the third operation n times in a loop, no frequency is found under the historical dwell frequency 5 of the HPLMN, and no frequency is found under the historical dwell frequency 7 of the EPLMN, then execute S1902.

S1902, the UE repeats the fourth operation m times. Among them, m is an integer greater than or equal to 0.

Wherein, the fourth operation includes: searching under the Full Band (for example, called Full Band 5) of the first standard of HPLMN, and if a frequency point is searched under Full Band 5 of HPLMN, sending the frequency point to the network device of the cell corresponding to the frequency point registration message. For example, the registration information is sent to the network device 3 .

If no frequency point is found in the Full Band 5 of the HPLMN, the search is performed in the Full Band of the second standard of the EPLMN (for example, called Full Band 7).

If a frequency point is searched under the Full Band7 of the first standard of the EPLMN, the registration information is sent to the network device of the cell corresponding to the frequency point. For example, the registration information is sent to the network device 2 .

If no frequency is found under Full Band 7 of EPLMN's network standard 7, continue to search under Full Band 5 of the first standard of HPLMN.

If no frequency is found in Full Band 5 of HPLMN and no frequency is found in Full Band 7 of EPLMN after performing the fourth operation m times in a loop, then perform S1803 and S1804 as shown in FIG. 18 .

Wherein, as described in the foregoing embodiments, in the scenario corresponding to FIG. 20 , when the UE attempts to restore the service, it needs to search N times at the historical dwell frequency points of the first standard of the HPLMN. If no frequency is found on the historical resident frequency of the first system of HPLMN in N times of searching, it is necessary to search M times on the Full Band of the first system of HPLMN at this time. If no frequency is found on the Full Band of the first system of HPLMN in M searches, it will switch to the searched PLMN for search. Since the network standard of the network equipment corresponding to the other cell where the UE is currently located is the second standard, and the PLMN of the other cell is different from the PLMN corresponding to the HPLMN information stored by the UE in the SIM card file, the UE is in the HPLMN at this time. When searching for the historical resident frequency of the first standard, or when searching in the Full Band of the first standard of HPLMN, the frequency of the first standard of HPLMN cannot be found, so that the UE cannot resume service. Therefore, in the embodiment of the present application, in the scenario corresponding to FIG. 20 , when the UE attempts to restore the service, it needs to search at the historical residence frequency of the first system of HPLMN, and the historical residence frequency of the first system of EPLMN. point to search for N times, so that when the UE tries the service in the scenario corresponding to FIG. 20, the service can be resumed. If the search is performed at the historical dwell frequency of the first system of HPLMN, and after searching N times of the historical dwell frequency of the first system of EPLMN, the search is not performed on the historical dwell frequency of the first system of HPLMN The frequency point is reached, and no frequency point is searched on the historical resident frequency point of the second system of the EPLMN. Then, the search is performed in the Full Band of the first standard of HPLMN, and the search is performed M times in the Full Band of the first standard of EPLMN, so as to ensure that the UE can resume the service.

Exemplarily, in conjunction with the scenario shown in Figure 20, the carrier to which the SIM card used by the UE belongs is Radio and Television, then the HPLMN stored by the UE is 46015, and because the network standard jointly deployed by Radio, Television and Mobile is 5G network equipment, At the same time, the radio and television leased the mobile network equipment with the 4G network standard, so that the radio and television users are within the coverage of the network equipment not deployed by the radio and television, but within the coverage of the network equipment independently deployed by the mobile, the radio and television users can roaming Access to mobile independently deployed network devices. Therefore, in this embodiment of the present application, it is determined that the mobile 46000 is the EPLMN of 46015 under 4G. The other cells 102 are cells corresponding to network equipment whose network standard is 4G independently deployed by the mobile phone, that is, the other cells 102 only provide 4G frequency points (eg, frequency point B) with a PLMN of 46000. When the UE requests restoration of service in other cells 102. Since 46000 is different from 46015, when the UE searches for the 5G historical resident frequency of 46015 in other cells 102, it cannot search for a frequency in the 5G historical resident frequency of 46015 (eg, frequency A). ). At this time, the UE will continue to search the 46015 4G historical resident frequency. Since the 46015 is the 46000 EPLMN under 4G, the UE can search for the frequency in the 46015 4G historical resident frequency (such as Frequency point B), so that the UE can resume service.

Using the above technical solution, in the prior art, when the UE is in the scenario corresponding to the above-mentioned FIG. 20, the UE searches at the historical resident frequency of the first standard of HPLMN, and when the UE searches in the Full Band of the first standard of HPLMN , the cell under the HPLMN cannot be searched. For this reason, in the cell search method provided by the embodiments of the present application, when the UE attempts to restore the service, it needs to search at the historical dwelling frequency of the first standard of HPLMN and the historical dwelling frequency of the first standard of EPLMN. N times, so that the UE can resume the service when trying the service in the scenario corresponding to FIG. 20 . If the search is performed at the historical dwell frequency of the first system of HPLMN, and after searching N times of the historical dwell frequency of the first system of EPLMN, there is no search on the historical dwell frequency of the first system of HPLMN The frequency point is reached, and no frequency point is searched on the historical resident frequency point of the second system of the EPLMN. Then, the search is performed in the Full Band of the first standard of HPLMN, and the search is carried out M times in the Full Band of the first standard of EPLMN, so that the UE can be guaranteed to resume the service.

It should be noted that, the above technical solution can optimize the cell search process shown in FIG. 18 , and can also optimize the cell search process shown in FIG. limit.

The solutions provided by the embodiments of the present application have been introduced above mainly from the perspective of methods. In order to realize the above-mentioned functions, it includes corresponding hardware structures and/or software modules for executing each function. Those skilled in the art should easily realize that the present application can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In this embodiment of the present application, the electronic device may be divided into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation.

As shown in FIG. 21 , a schematic structural diagram of a cell search apparatus 10 under a multi-operator provided by an embodiment of the present application may include a transceiver unit 101 and a processing unit 102 .

The cell search apparatus 10 under the multi-operator can be applied to user equipment UE. In the case that the UE meets the preset conditions, the UE performs a network search operation; wherein, the UE saves the information of the registered public land mobile network RPLMN, and the preset conditions include power-on or cell reselection; the network search operation includes: the processing unit 102 , which is used to skip the process of searching under the RPLMN and search for the HPLMN when the HPLMN of the UE is a predefined PLMN. The processing unit 102 is further configured to control the transceiver unit 101 to send registration information to the network device corresponding to the frequency point for requesting access to the network device when the frequency point is searched under the HPLMN. Wherein, the region or country corresponding to the predefined PLMN has a co-constructed network, and the network device providing the co-constructed network corresponds to multiple PLMNs.

In an implementable manner, the transceiver unit 101 is used to obtain the location information of the UE. The processing unit 102 is further configured to determine, according to the location information obtained by the transceiver unit 101, that the country where the UE is located is a predefined country.

In an implementable manner, the first operator to which the user identity module SIM card of the UE belongs and the second operator jointly deploy network equipment, and the PLMN of the second operator is the EPLMN of the UE; the processing unit 102 is further configured to: In the case that no frequency point is searched under the HPLMN, and the frequency point of the EPLMN is searched, the UE sends registration information to the network device corresponding to the frequency point of the EPLMN.

In an implementable manner, the processing unit 102 is specifically configured to search for the historical dwell frequency points of the first standard of the HPLMN. The processing unit 102 is specifically configured to search the historical resident frequency points of the second format of the HPLMN under the condition that no frequency points are searched under the historical resident frequency points of the first format of the HPLMN, and the network equipment of the second format The UE is allowed to access in roaming mode, and the first mode is different from the second mode. The processing unit 102 is specifically configured to search the full frequency band of the first HPLMN standard when no frequency is found under the historical resident frequency of the second HPLMN standard, and no frequency of the EPLMN is found. The processing unit 102 is specifically configured to search for the UE in the full frequency band of the second standard of the HPLMN when no frequency point is found in the full frequency band of the first standard of the HPLMN.

In an implementable manner, the processing unit 102 is specifically configured to control the transceiver unit 101 to send an EPLMN frequency when no frequency is searched under the historical resident frequency of the second standard of the HPLMN, and the frequency of the EPLMN is searched. The network device corresponding to the frequency point of the EPLMN sends the registration information. Alternatively, the processing unit 102 is specifically configured to send the registration information to the network device corresponding to the frequency of the EPLMN when no frequency is found in the full frequency band of the second standard of the HPLMN, and the frequency of the EPLMN is found.

In an implementable manner, the first operator to which the subscriber identity module SIM card used by the UE belongs and the second operator jointly deploy network equipment whose network standard is the first standard, and the PLMN of the second operator is in the first standard. The following is the FPLMN of the UE, the network equipment of the second standard allows the UE to access in a roaming manner, and the first standard is different from the second standard; the processing unit 102 is specifically configured to skip the frequency point when no frequency point is searched under the HPLMN. The process of searching the frequency points of the first system of the EPLMN is to search the frequency points of the second system of the EPLMN. Among them, the frequency points of the first standard include the historical dwell frequency points under the first standard, and the frequency points in the whole frequency band, and the frequency points of the second standard include the historical dwell frequency points under the second standard, and the frequency points in the whole frequency band. frequency point.

In an implementable manner, the processing unit 102 is specifically configured to control the transceiver unit 101 to send registration information to the network device corresponding to the frequency when a frequency is found under the historical resident frequency of the second standard. Alternatively, the processing unit 102 is specifically configured to control the transceiver unit 101 to send the registration information to the network device corresponding to the frequency point when the frequency point is searched in the full frequency band of the second standard.

In an implementable manner, the processing unit 102 is specifically configured to search the historical dwell frequency points of each standard of the HPLMN. The processing unit 102 is specifically configured to search the historical resident frequency of the PLMN searched when the HPLMN is searched when no frequency is found under the historical resident frequency of each standard of the HPLMN. The processing unit 102 is specifically configured to search the full frequency band of each standard of the HPLMN under the condition that no frequency point is found under the historical resident frequency points of the PLMN searched during the search for the HPLMN. The processing unit 102 is specifically configured to search for the full frequency band of the PLMN that is searched when the HPLMN is searched when no frequency point is found in the full frequency band of each standard of the HPLMN.

In an implementable manner, the predefined PLMN is 46015, the first standard is 5G, and the second standard is 4G.

In an implementable manner, the transceiver unit 101 is specifically configured to acquire the current coordinates of the UE, wherein the coordinates are used to indicate the current geographic location of the UE.

In an implementable manner, the processing unit 102 is specifically configured to perform emergency camping on the currently searched cell that can access the network. The accessible network corresponds to one PLMN; the processing unit is specifically configured to determine the location information of the UE according to the PLMN of the accessible network.

In an implementable manner, the processing unit 102 is configured to, in the case that the UE successfully camps on the cell of the network device, the service of the UE is interrupted, and when the service is requested to be restored, the history of the first standard of the HPLMN is camped on. frequency to search. The processing unit 102 is further configured to search for the historical dwell frequency of the second standard of the EPLMN of the UE in the case that no frequency is searched under the historical dwell frequency of the first standard of the HPLMN. The processing unit 102 is further configured to search the full frequency band of the first standard of the HPLMN under the condition that no frequency is searched under the historical resident frequency of the second standard of the EPLMN; If no frequency point is found in the full frequency band of the first standard of the EPLMN, search the full frequency band of the second standard of the EPLMN. The processing unit 102 is further configured to search the PLMN searched when the HPLMN is searched when no frequency is found in the full frequency band of the second standard of the EPLMN; the processing unit 102 is further configured to search for the frequency In the case of , control the transceiver unit 101 to send the registration information to the network device corresponding to the searched frequency point.

Wherein, all relevant contents of the steps involved in the above method embodiments can be cited in the functional descriptions of the corresponding functional modules, and the functions thereof will not be repeated here.

Certainly, the cell search apparatus 10 under the multi-operator provided in the embodiment of the present application includes but is not limited to the above-mentioned modules. For example, the cell search apparatus 10 under the multi-operator may further include the storage unit 103 . The storage unit 103 can be used to store the program code of the cell search apparatus 10 under the write multi-operator, and can also be used to store the data generated during the operation of the cell search apparatus 10 under the write multi-operator, such as in the write request. data etc.

The cell search apparatus 10 under the multi-operator in the embodiment of the present application may be the UE 110 shown in FIG. 1 , or may be a part of the apparatus in the UE 110 . For example, a system-on-a-chip in UE 110 . The chip system is used to support the UE 110 to implement the functions involved in the first aspect, the second aspect and any possible implementation manners thereof. For example, in the case where the HPLMN of the UE 110 is a predefined PLMN, the UE 110 skips the process of searching under the RPLMN, and searches the HPLMN; in the case where the frequency point is searched under the HPLMN, the UE 110 sends the frequency point corresponding to the frequency point. The network device sends the registration information. The chip system includes chips, and may also include other discrete devices or circuit structures.

Take the above-mentioned electronic device being a mobile phone as an example. Please refer to FIG. 22, which shows a schematic structural diagram of an electronic device 100 provided by an embodiment of the present application.

The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charge management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2 , mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, headphone jack 170D, sensor module 180, buttons 190, motor 191, indicator 192, camera 193, display screen 194, and Subscriber identification module (SIM) card interface 195 and the like. The sensor module 180 may include a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, and the like.

It can be understood that the structures illustrated in the embodiments of the present application do not constitute a specific limitation on the electronic device 100 . In other embodiments of the present application, the electronic device 100 may include more or less components than shown, or combine some components, or separate some components, or arrange different components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 110 may include one or more processing units, for example, the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor ( image signal processor, ISP), controller, memory, video codec, digital signal processor (DSP), baseband processor, and/or neural-network processing unit (NPU), etc. . Wherein, different processing units may be independent devices, or may be integrated in one or more processors.

The controller may be the nerve center and command center of the electronic device 100 . The controller can generate an operation control signal according to the instruction operation code and timing signal, and complete the control of fetching and executing instructions.

A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. This memory may hold instructions or data that have just been used or recycled by the processor 110 . If the processor 110 needs to use the instruction or data again, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 110 is reduced, thereby increasing the efficiency of the system.

The charging management module 140 is used to receive charging input from the charger.

The power management module 141 is used for connecting the battery 142 , the charging management module 140 and the processor 110 . The power management module 141 receives input from the battery 142 and/or the charge management module 140, and supplies power to the processor 110, the internal memory 121, the external memory, the display screen 194, the camera 193, and the wireless communication module 160. The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle times, battery health status (leakage, impedance).

The wireless communication function of the electronic device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modulation and demodulation processor, the baseband processor, and the like.

Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 100 may be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example, the antenna 1 can be multiplexed as a diversity antenna of the wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 may provide wireless communication solutions including 2G/3G/4G/5G etc. applied on the electronic device 100 . The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA) and the like. The mobile communication module 150 can receive electromagnetic waves from the antenna 1, filter and amplify the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modulation and demodulation processor, and then turn it into an electromagnetic wave for radiation through the antenna 1 . In some embodiments, at least part of the functional modules of the mobile communication module 150 may be provided in the processor 110 . In some embodiments, at least part of the functional modules of the mobile communication module 150 may be provided in the same device as at least part of the modules of the processor 110 .

The modem processor may include a modulator and a demodulator. Wherein, the modulator is used to modulate the low frequency baseband signal to be sent into a medium and high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. Then the demodulator transmits the demodulated low-frequency baseband signal to the baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and passed to the application processor. The application processor outputs sound signals through audio devices (not limited to the speaker 170A, the receiver 170B, etc.), or displays images or videos through the display screen 194 . In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be independent of the processor 110, and may be provided in the same device as the mobile communication module 150 or other functional modules.

The wireless communication module 160 can provide wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), and global navigation satellite systems applied on the electronic device 100 . (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2 , frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 110 . The wireless communication module 160 can also receive the signal to be sent from the processor 110 , perform frequency modulation on it, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2 .

In some embodiments, the antenna 1 of the electronic device 100 is coupled with the mobile communication module 150, and the antenna 2 is coupled with the wireless communication module 160, so that the electronic device 100 can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code Wideband code division multiple access (WCDMA), time-division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM , and/or IR technology, etc. The GNSS may include a global positioning system (GPS), a global navigation satellite system (GLONASS), a Beidou satellite navigation system (BDS), a quasi-zenith satellite system (quasi- zenith satellite system, QZSS) and/or satellite based augmentation systems (SBAS).

The electronic device 100 implements a display function through a GPU, a display screen 194, an application processor, and the like. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.

Display screen 194 is used to display images, videos, and the like. Display screen 194 includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode). , AMOLED), flexible light-emitting diodes (flex light-emitting diodes, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light-emitting diodes (quantum dot light emitting diodes, QLED) and so on. In some embodiments, the electronic device 100 may include one or N display screens 194 , where N is a positive integer greater than one.

The electronic device 100 may implement a shooting function through an ISP, a camera 193, a video codec, a GPU, a display screen 194, an application processor, and the like.

The ISP is used to process the data fed back by the camera 193 . Camera 193 is used to capture still images or video. A digital signal processor is used to process digital signals, in addition to processing digital image signals, it can also process other digital signals. Video codecs are used to compress or decompress digital video. The NPU is a neural-network (NN) computing processor. By drawing on the structure of biological neural networks, such as the transfer mode between neurons in the human brain, it can quickly process the input information, and can continuously learn by itself. Applications such as intelligent cognition of the electronic device 100 can be implemented through the NPU, such as image recognition, face recognition, speech recognition, text understanding, and the like.

The external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device 100. The external memory card communicates with the processor 110 through the external memory interface 120 to realize the data storage function. For example to save files like music, video etc in external memory card.

Internal memory 121 may be used to store computer executable program code, which includes instructions. The processor 110 executes various functional applications and data processing of the electronic device 100 by executing the instructions stored in the internal memory 121 . The internal memory 121 may include a storage program area and a storage data area. The storage program area can store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), and the like. The storage data area may store data (such as audio data, phone book, etc.) created during the use of the electronic device 100 and the like. In addition, the internal memory 121 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash storage (UFS), and the like.

The electronic device 100 may implement audio functions through an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, an application processor, and the like. Such as music playback, recording, etc.

The audio module 170 is used for converting digital audio information into analog audio signal output, and also for converting analog audio input into digital audio signal. Audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be provided in the processor 110 , or some functional modules of the audio module 170 may be provided in the processor 110 .

Speaker 170A, also referred to as a "speaker", is used to convert audio electrical signals into sound signals. The receiver 170B, also referred to as "earpiece", is used to convert audio electrical signals into sound signals. The microphone 170C, also called "microphone" or "microphone", is used to convert sound signals into electrical signals. The earphone jack 170D is used to connect wired earphones. The earphone interface 170D may be the USB interface 130, or may be a 3.5mm open mobile terminal platform (OMTP) standard interface, a cellular telecommunications industry association of the USA (CTIA) standard interface.

The pressure sensor is used to sense the pressure signal and can convert the pressure signal into an electrical signal. The gyro sensor can be used to determine the motion attitude of the electronic device 100 . Air pressure sensors are used to measure air pressure. Magnetic sensors include Hall sensors. The acceleration sensor can detect the magnitude of the acceleration of the electronic device 100 in various directions (generally three axes). Distance sensor for measuring distance. Proximity light sensors may include, for example, light emitting diodes (LEDs) and light detectors, such as photodiodes. The ambient light sensor is used to sense ambient light brightness. The fingerprint sensor is used to collect fingerprints. A temperature sensor is used to detect temperature. Touch sensor, also known as "touch panel". Bone conduction sensors can acquire vibration signals. The keys 190 include a power-on key, a volume key, and the like. Motor 191 can generate vibrating cues. The indicator 192 can be an indicator light, which can be used to indicate the charging state, the change of the power, and can also be used to indicate a message, a missed call, a notification, and the like.

The SIM card interface 195 is used to connect a SIM card. The SIM card can be contacted and separated from the electronic device 100 by inserting into the SIM card interface 195 or pulling out from the SIM card interface 195 . The electronic device 100 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 195 can support Nano SIM card, Micro SIM card, SIM card and so on. Multiple cards can be inserted into the same SIM card interface 195 at the same time. The types of the plurality of cards may be the same or different. The SIM card interface 195 can also be compatible with different types of SIM cards. The SIM card interface 195 is also compatible with external memory cards. The electronic device 100 interacts with the network through the SIM card to implement functions such as call and data communication. In some embodiments, the electronic device 100 employs an eSIM, ie: an embedded SIM card. The eSIM card can be embedded in the electronic device 100 and cannot be separated from the electronic device 100 .

The methods shown in FIG. 9 to FIG. 17 and FIG. 19 in the above embodiments may be applied to the above electronic device 100 .

Another embodiment of the present application further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on the computer, the computer is made to execute the method shown in the foregoing method embodiment.

In some embodiments, the disclosed methods may be implemented as computer program instructions encoded in a machine-readable format on a computer-readable storage medium or on other non-transitory media or articles of manufacture.

From the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be Incorporation may either be integrated into another device, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place, or may be distributed to multiple different places . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, which are stored in a storage medium , including several instructions to make a device (may be a single chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk and other mediums that can store program codes.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the protection scope of the present application. . Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (23)

1. A cell search method under multiple operators is applied to user equipment, and the cell search method comprises the following steps:

under the condition that the user equipment meets preset conditions, the user equipment executes network searching operation; the UE stores information of a registered public land mobile network, and the preset condition comprises starting up or cell reselection;

the network searching operation comprises the following steps:

in the case that the local public land mobile network of the user equipment is a predefined public land mobile network, the user equipment skips a process of searching under the registered public land mobile network, and searches the local public land mobile network;

under the condition that the frequency point is searched in the local public land mobile network, the user equipment sends registration information to network equipment corresponding to the frequency point, and the registration information is used for requesting to access the network equipment; wherein, a co-established network exists in a region or a country corresponding to the predefined public land mobile network, and network equipment providing the co-established network corresponds to a plurality of public land mobile networks;

under the condition that the user equipment is successfully resided in the cell of the network equipment, the service of the user equipment is interrupted, and when the service is requested to be recovered, the user equipment searches the historical residence frequency point of the first standard of the local public land mobile network;

under the condition that no frequency point is searched under the historical residing frequency point of the first standard of the local public land mobile network, the user equipment searches the historical residing frequency point of the second standard of the equivalent public land mobile network of the user equipment;

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the equivalent public land mobile network, the user equipment searches the full frequency band of the first standard of the local public land mobile network;

under the condition that the frequency point is not searched under the full frequency band of the first standard of the local public land mobile network, the user equipment searches the full frequency band of the second standard of the equivalent public land mobile network;

under the condition that the frequency point is not searched under the full frequency band of the second standard of the equivalent public land mobile network, the user equipment searches the public land mobile network searched when the local public land mobile network is searched;

and under the condition that the frequency point is searched, the user equipment sends registration information to the network equipment corresponding to the searched frequency point.

2. The method of claim 1, wherein if the local public land mobile network of the UE is a predefined public land mobile network, the UE skips a search procedure under the registered public land mobile network, and wherein the method further comprises, before searching the local public land mobile network:

the user equipment acquires the position information of the user equipment and determines the country of the user equipment to be a predefined country according to the position information.

3. The method of claim 1, wherein a first operator to which the subscriber identity module of the ue belongs and a second operator co-deploy network equipment, and a public land mobile network of the second operator is an equivalent public land mobile network of the ue;

the method further comprises the following steps:

and under the condition that the frequency point is not searched in the local public land mobile network and the frequency point of the equivalent public land mobile network is searched, the user equipment sends registration information to network equipment corresponding to the frequency point of the equivalent public land mobile network.

4. The method of claim 3, wherein the searching under the local public land mobile network comprises:

the user equipment searches a historical resident frequency point of a first system of the local public land mobile network;

under the condition that a frequency point is not searched under a historical residing frequency point of a first standard of the local public land mobile network, the user equipment searches a historical residing frequency point of a second standard of the local public land mobile network, the network equipment of the second standard allows the user equipment to be accessed in a roaming mode, and the first standard is different from the second standard;

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the local public land mobile network and no frequency point of the equivalent public land mobile network is searched, the user equipment searches the full frequency band of the first standard of the local public land mobile network;

and under the condition that the frequency point is not searched under the full frequency band of the first standard of the local public land mobile network, the user equipment searches under the full frequency band of the second standard of the local public land mobile network.

5. The method of claim 4, wherein when the frequency point is not searched in the local public land mobile network and the frequency point of the equivalent public land mobile network is searched, the sending, by the UE, the registration information to the network device corresponding to the frequency point of the equivalent public land mobile network comprises:

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the local public land mobile network and the frequency point of the equivalent public land mobile network is searched, the user equipment sends the registration information to network equipment corresponding to the frequency point of the equivalent public land mobile network;

or, the user equipment sends the registration information to network equipment corresponding to the frequency point of the equivalent public land mobile network under the condition that the frequency point is not searched in the full frequency band of the second standard of the local public land mobile network and the frequency point of the equivalent public land mobile network is searched.

6. The method according to claim 3, wherein a first operator and a second operator to which a subscriber identity module used by the ue belongs jointly deploy network devices with a first network standard, the public land mobile network of the second operator is a forbidden public land mobile network of the ue in the first standard, the network devices of the second standard allow the ue to access in a roaming manner, and the first standard is different from the second standard;

the method further comprises the following steps:

under the condition that the frequency point is not searched in the local public land mobile network, the user equipment skips the process of searching the frequency point of the first standard of the equivalent public land mobile network and searches the frequency point of the second standard of the equivalent public land mobile network; the frequency points of the first standard comprise historical residing frequency points under the first standard and frequency points in a full frequency band, and the frequency points of the second standard comprise historical residing frequency points under the second standard and frequency points in the full frequency band.

7. The method of claim 6, further comprising:

under the condition that the frequency point is searched under the historical resident frequency point of the second standard, the user equipment sends the registration information to the network equipment corresponding to the frequency point;

or,

and under the condition that the frequency point is searched under the full frequency band of the second standard, the user equipment sends the registration information to the network equipment corresponding to the frequency point.

8. The method of claim 1, wherein the searching under the local public land mobile network comprises:

searching historical resident frequency points of each system of the local public land mobile network;

under the condition that no frequency point is searched under the historical residing frequency point of each standard of the local public land mobile network, the user equipment searches the historical residing frequency point of the public land mobile network searched when the local public land mobile network is searched;

under the condition that no frequency point is searched under the historical resident frequency point of the public land mobile network searched when the local public land mobile network is searched, the user equipment searches the full frequency band of each system of the local public land mobile network;

and under the condition that the frequency point is not searched under the full frequency band of each system of the local public land mobile network, the user equipment searches the full frequency band of the public land mobile network searched when the local public land mobile network is searched.

9. The method of claim 4, wherein the predefined PLMN is 46015, the first standard is a fifth generation mobile communication technology, and the second standard is a fourth generation mobile communication technology.

10. The method of claim 2, wherein the obtaining the location information of the ue comprises:

the user equipment acquires the current coordinates of the user equipment; wherein the coordinates are used to indicate a geographic location where the user equipment is currently located.

11. The method of claim 2, wherein the obtaining the location information of the ue comprises:

the user equipment carries out emergency residence to the cell which is searched currently and can access the network; wherein the accessible network corresponds to a public land mobile network;

and the user equipment determines the position information of the user equipment according to the public land mobile network of the accessible network.

12. An electronic device, comprising:

a processor;

a memory for storing the processor-executable instructions;

wherein the processor is configured to execute the instructions to cause the electronic device to perform the following:

under the condition that the electronic equipment meets a preset condition, the electronic equipment executes network searching operation; the electronic equipment stores information of a registered public land mobile network and a registered public land mobile network, and the preset condition comprises starting up or cell reselection;

the network searching operation comprises the following steps:

in the case that the local public land mobile network of the electronic device is a predefined public land mobile network, the electronic device skips a process of searching under the registered public land mobile network and searches the local public land mobile network;

under the condition that the frequency point is searched in the local public land mobile network, the electronic equipment sends registration information to network equipment corresponding to the frequency point, and the registration information is used for requesting to access the network equipment; wherein, a co-established network exists in the region or country corresponding to the predefined public land mobile network, and the network equipment providing the co-established network corresponds to a plurality of public land mobile networks;

under the condition that the electronic equipment is successfully resided in the cell of the network equipment, the service of the electronic equipment is interrupted, and when the service is requested to be recovered, the electronic equipment searches the historical residence frequency point of the first standard of the local public land mobile network;

under the condition that the frequency point is not searched under the historical residing frequency point of the first standard of the local public land mobile network, the electronic equipment searches the historical residing frequency point of the second standard of the local public land mobile network;

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the local public land mobile network, the electronic equipment searches the full frequency band of the first standard of the local public land mobile network;

under the condition that the frequency point is not searched under the full frequency band of the first standard of the local public land mobile network, the electronic equipment searches the full frequency band of the second standard of the local public land mobile network;

under the condition that the frequency point is not searched under the full frequency band of the second standard of the local public land mobile network, the electronic equipment searches the public land mobile network searched when the local public land mobile network is searched;

and under the condition that the frequency point is searched, the electronic equipment sends registration information to the network equipment corresponding to the searched frequency point.

13. The electronic device of claim 12, wherein the processor is configured to execute the instructions to cause the electronic device to further perform the following:

the electronic equipment acquires the position information of the electronic equipment and determines that the country where the electronic equipment is located is a predefined country according to the position information.

14. The electronic device of claim 12, wherein a first operator to which a subscriber identity module of the electronic device belongs and a second operator co-deploy network equipment, and a public land mobile network of the second operator is an equivalent public land mobile network of the electronic device;

the processor is configured to execute the instructions such that the electronic device further performs the following:

and under the condition that the frequency point is not searched in the local public land mobile network and the frequency point of the equivalent public land mobile network is searched, the electronic equipment sends registration information to network equipment corresponding to the frequency point of the equivalent public land mobile network.

15. The electronic device of claim 14, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

the electronic equipment searches a historical resident frequency point of a first system of the local public land mobile network;

under the condition that a frequency point is not searched under a historical residing frequency point of a first standard of the local public land mobile network, the electronic equipment searches a historical residing frequency point of a second standard of the local public land mobile network, the network equipment of the second standard allows the electronic equipment to be accessed in a roaming mode, and the first standard is different from the second standard;

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the local public land mobile network and no frequency point of the equivalent public land mobile network is searched, the electronic equipment searches the full frequency band of the first standard of the local public land mobile network;

and under the condition that the frequency point is not searched under the full frequency band of the first standard of the local public land mobile network, the electronic equipment searches under the full frequency band of the second standard of the local public land mobile network.

16. The electronic device of claim 15, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

under the condition that no frequency point is searched under the historical resident frequency point of the second standard of the local public land mobile network and the frequency point of the equivalent public land mobile network is searched, the electronic equipment sends the registration information to network equipment corresponding to the frequency point of the equivalent public land mobile network;

or, the electronic device sends the registration information to a network device corresponding to the frequency point of the equivalent public land mobile network under the condition that the frequency point is not searched in the full frequency band of the second standard of the local public land mobile network and the frequency point of the equivalent public land mobile network is searched.

17. The electronic device according to claim 14, wherein a first operator and a second operator to which a subscriber identity module used by the electronic device belongs jointly deploy network devices with a network standard of a first standard, a public land mobile network of the second operator is a forbidden public land mobile network of the electronic device in the first standard, the network devices of the second standard allow the electronic device to access in a roaming manner, and the first standard is different from the second standard;

the processor is configured to execute the instructions such that the electronic device further performs the following:

under the condition that the frequency point is not searched in the local public land mobile network, the electronic equipment skips the process of searching the frequency point of the first standard of the local public land mobile network and searches the frequency point of the second standard of the equivalent public land mobile network; the frequency points of the first standard comprise historical residing frequency points under the first standard and frequency points in a full frequency band, and the frequency points of the second standard comprise historical residing frequency points under the second standard and frequency points in the full frequency band.

18. The electronic device of claim 17, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

under the condition that the frequency point is searched under the historical resident frequency point of the second standard, the electronic equipment sends the registration information to the network equipment corresponding to the frequency point;

or,

and under the condition that the frequency point is searched under the full frequency band of the second standard, the electronic equipment sends the registration information to the network equipment corresponding to the frequency point.

19. The electronic device of claim 12, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

searching historical resident frequency points of each system of the local public land mobile network;

under the condition that no frequency point is searched under the historical residing frequency point of each standard of the local public land mobile network, the electronic equipment searches the historical residing frequency point of the public land mobile network searched when the local public land mobile network is searched;

under the condition that no frequency point is searched under the historical resident frequency point of the public land mobile network searched when the local public land mobile network is searched, the electronic equipment searches the full frequency band of each system of the local public land mobile network;

and under the condition that the frequency point is not searched under the full frequency band of each system of the local public land mobile network, the electronic equipment searches the full frequency band of the public land mobile network searched when the local public land mobile network is searched.

20. The electronic device of claim 15, wherein the predefined public land mobile network is 46015, the first standard is a fifth generation mobile communication technology, and the second standard is a fourth generation mobile communication technology.

21. The electronic device of claim 13, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

the electronic equipment acquires the current coordinates of the electronic equipment; wherein the coordinates are used for indicating the current geographic position of the electronic equipment.

22. The electronic device of claim 13, wherein the processor is configured to execute the instructions to cause the electronic device to perform the following in particular:

the electronic equipment carries out emergency residence to the cell which is searched currently and can be accessed to the network; wherein the accessible network corresponds to a public land mobile network;

the electronic equipment determines the position information of the electronic equipment according to the public land mobile network of the accessible network.

23. A computer readable storage medium, instructions in which, when executed by a processor of an electronic device, enable the electronic device to perform the method of cell search under multiple operators of any one of claims 1 to 11.

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