CN115567999B - Mobile communication network selection method and device - Google Patents

Abstract

The application provides a mobile communication network selection method and a device, which maintain a heterogeneous network roaming area list and a non-heterogeneous network roaming area list at a terminal side, when the position information of the terminal changes, the current area of the terminal is queried based on the list, and if the current area reaches the non-heterogeneous network roaming area, the frequency band of a home network is selected for network searching and accessing. And if the network currently reaches the heterogeneous network roaming area, selecting a frequency band of the visiting network to perform network searching and accessing. Therefore, the scheme can identify the type of the current area of the terminal based on the position information of the terminal, and further, the network frequency band matched with the current area is selected for network searching and accessing, so that the terminal is quickly accessed into the network matched with the current area, the time consumption of the whole network searching process is reduced, the power consumption is reduced, the network access speed is improved, and the user experience is improved.

Description

Mobile communication network selection method and device

This application claims priority to the Chinese patent application submitted to the State Intellectual Property Office of China on January 7, 2022, with application number 202210015669.2 and the invention title "Mobile Communication Network Selection Method and Device", the entire content of which is incorporated herein by reference. Applying.

Technical field

The present application relates to the field of mobile communication technology, and in particular, to a mobile communication network selection method and device.

Background technique

The same type of mobile communication networks built by different operators have different frequency bands. For example, the frequency band of the 5th Generation Mobile Communication Technology (5G) network of China's domestic telecom operators is different from the frequency band of the 5G network of mobile operators. The frequency bands are different.

In order to avoid the problems of repeated investment and non-sharing of resources by different network operators (hereinafter referred to as operators) in the construction of mobile communication networks, starting from the 5G network, mobile communication networks have realized network resource sharing. For example, only one operator A has deployed a 5G mobile communication network (or a network above 5G) in a certain area (usually a remote area or an economically underdeveloped area). The terminals of other operators in this area can use the shared public network. The Public LandMobile Network (PLMN) is connected to Operator A's 5G network (i.e., the visited network). This process is called inter-network roaming.

When the terminal moves from a different network roaming area to a non-different network roaming area, it will try to access the visited network, that is, it will initiate a search for the frequency band of the visited network, which will increase the time and power consumption of the mobile communication network search. In the same way, when the terminal moves from a non-foreign network roaming area to a different network roaming area, if it still selects the network in the non-foreign network roaming area (i.e., the home network), that is, initiates a search for the frequency band of the home network, it will also cause the network search process to be time-consuming. In time, power consumption increases.

Contents of the invention

In view of this, this application provides a mobile communication network selection method and device to solve the problems of time-consuming and high power consumption in the traditional network search process. The disclosed technical solutions are as follows:

In a first aspect, this application provides a mobile communication network selection method, which is applied to a terminal device. The method includes: when a change in the location information of the terminal device is detected, querying a preset list of location information corresponding to different types of areas. , determine the type of area where the terminal device is located. The type of area includes a different network roaming area and a non-different network roaming area; if the terminal device moves from a different network roaming area to a non-different network roaming area, the frequency band of the home network of the terminal device is used. Network search: If the terminal device moves from a non-different network roaming area to a different network roaming area, network search is performed based on the frequency band of the terminal's visited network, which is the non-home network of the terminal device. It can be seen that this solution can identify the type of area where the terminal is currently located based on the location information of the terminal. Furthermore, it can select the network frequency band that matches the current area for network search and access, thereby realizing rapid access of the terminal to the area where it is currently located. In a network that matches the region, the time-consuming process of the entire network search process is reduced, power consumption is reduced, network access speed is increased, and user experience is improved.

In a possible implementation of the first aspect, the type of area also includes a border area located in the adjacent range of a foreign network roaming area and a non-foreign network roaming area; the method also includes: if the terminal device moves from the border area to the non-internet roaming area, In a different network roaming area, network search is performed based on the frequency band of the terminal device's home network; if the terminal device moves from a non-different network roaming area to a border area, a network search is performed based on the frequency band of the terminal's visited network. In this way, the boundary area is further divided, thereby realizing the search strategy when the terminal is in the boundary area, and improving the user experience in this scenario.

In another possible implementation of the first aspect, the location information is the tracking area code TAC of the cell where the terminal equipment resides, and the location information lists corresponding to different types of areas include a foreign network roaming area TAC list and a non-different network roaming area TAC list.

and border area TAC list; when it is detected that the location information of the terminal device changes, query the different preset area types.

The corresponding location information list to determine the type of area where the terminal device is located includes: when the TAC of the cell where the terminal device currently resides changes, query the foreign network roaming area TAC list, non-different network roaming area TAC list and border area TAC list respectively. Whether the TAC of the current resident cell is included in TAC determines that the terminal device is in a non-different network roaming area; if the border area TAC list contains the TAC of the current resident cell, it determines that the terminal device is in a border area. It can be seen that this solution searches for TAC lists in different areas to determine the area where the terminal is located based on the TAC where the terminal resides. A TAC corresponds to a larger geographical range, so the amount of data in the TAC list is small, thus saving the storage space of the terminal.

In yet another possible implementation of the first aspect, the process of obtaining TAC lists corresponding to different types of areas includes: if the terminal device receives the shared PLMN sent by the mobile communication network, recording the TAC of the current resident cell in a different network roaming area TAC list; if the terminal device receives the non-shared PLMN sent by the mobile communication network, the TAC of the current resident cell is recorded in the non-different network roaming area TAC list; if the terminal device receives the shared PLMN and the non-shared PLMN If the PLMN changes alternately, the TAC of the current resident cell is recorded in the border area TAC list.

In yet another possible implementation of the first aspect, the location information is positioning data set by the terminal device, and the location information lists corresponding to different types of areas include a foreign network roaming area location list, a non-foreign network roaming area location list, and a border area location. list; when it is detected that the location information of the terminal device changes, query the preset location information list corresponding to different area types to determine the type of area where the terminal device is located, including: when the positioning data of the terminal device changes, query the abnormality list Whether the current positioning data of the terminal device is included in the network roaming area location list, non-different network roaming area location list and border area location list; if the current positioning data is included in the foreign network roaming area location list, it is determined that the terminal device is in the foreign network roaming area; If the non-extra-network roaming area location list contains current positioning data, it is determined that the terminal device is in a non-extra-network roaming area; if the border area location list contains current positioning data, it is determined that the terminal device is in a border area.

In another possible implementation of the first aspect, the process of obtaining location lists corresponding to different types of areas includes: obtaining a location list of non-extra-network roaming areas, a location list of inter-network roaming areas, and a location list of border areas from the server; Wherein, the non-foreign network roaming area location list includes areas covered by the home network, the foreign network roaming area location list includes areas covered by the visited network and not covered by the home network, and the boundary The area location list includes areas that are at the boundary of the home network coverage area and are at the boundary of the visited network coverage area.

In yet another possible implementation of the first aspect, the process of obtaining location lists corresponding to different types of areas includes: obtaining a non-extra-network roaming area location list, a different-network roaming area location list, and a border area location list from the server; Wherein, the non-different network roaming area location list includes densely populated areas, the different network roaming area location list includes sparsely populated areas, and the boundary area location list includes the boundary area between the densely populated area and the sparsely populated area. .

In yet another possible implementation of the first aspect, after determining that the terminal device moves from a foreign network roaming area to a non-foreign network roaming area, the method further includes: setting a network frequency band supported by the terminal device as a frequency band of the home network; After determining that the terminal device moves from a non-different network roaming area to a different network roaming area, the method further includes: setting a network frequency band supported by the terminal device including a frequency band of the visited network. It can be seen that when the terminal device moves from a different network roaming area to a non-different network roaming area, the frequency band for network search is dynamically set to the frequency band of the home network, and the frequency band of the home network is directly used for network search, avoiding the use of the frequency band of the visited network for network search. The time-consuming process of the network search process is shortened and the power consumption of the network search process is reduced. And, when the terminal device moves from a non-different network roaming area to a different network roaming area, the network search frequency band is dynamically set to include the frequency band of the visited network, so that the terminal device can use the frequency band of the visited network to search for the network, thereby shortening the network search process. At the same time, the power consumption of the network search process is reduced.

In yet another possible implementation of the first aspect, the method further includes: if the terminal device moves from a border area to a non-different network roaming area, setting the network frequency band supported by the terminal device to the frequency band of the home network; if the terminal device moves from Move the non-different network roaming area to the border area, and set the network frequency bands supported by the terminal device to include the frequency band of the visited network.

In yet another possible implementation of the first aspect, after determining that the terminal device moves from a foreign network roaming area to a non-foreign network roaming area, the method further includes: setting a frequency band of the home network to have a higher priority than a frequency band of the visited network; After it is determined that the terminal device moves from a non-different network roaming area to a different network roaming area, the method further includes: setting the priority of the frequency band of the visited network to be higher than the frequency band of the home network. In this way, when the terminal device moves from one area to another, the priority of network search is dynamically set, and the frequency band with the highest priority is used first for network search, so as to avoid still using the frequency band corresponding to the previous area for network search, shortening the network The search process is time-consuming and the power consumption of the network access process is reduced.

In another possible implementation of the first aspect, the method further includes: if the terminal device moves from a border area to a non-different network roaming area, setting the priority of the frequency band of the home network to be higher than that of the visited network; if the terminal device moves from The non-different network roaming area is moved to the border area, and the frequency band of the visited network is set to have a higher priority than the frequency band of the home network.

In a second aspect, this application also provides a terminal device. The electronic device includes: one or more processors, memories and touch screens; the memory is used to store program codes; the processor is used to run the program codes, so that the terminal device implements the first The mobile communication network selection method described in any possible implementation manner.

In a third aspect, the present application also provides a computer-readable storage medium on which instructions are stored. When the instructions are run on a terminal device, the terminal device is executed to cause the terminal device to implement any one of the first aspects. The mobile communication network selection method described in the possible implementation manner.

In a fourth aspect, the present application also provides a computer program product on which execution is stored. When the computer program product is run on a terminal device, the terminal device implements any one of the aspects of the first aspect. The mobile communication network selection method described in the possible implementation manner.

In a fifth aspect, this application also provides a chip system, including: at least one processor and an interface, the interface is used to receive code instructions and transmit them to the at least one processor; the at least one processor runs the The above code instructions are used to implement the mobile communication network selection method described in any possible implementation manner of the first aspect.

It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be achieved in any single embodiment. On the contrary, it can be understood that the description of features or beneficial effects means that specific technical features, technical solutions or beneficial effects are included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions or beneficial effects in this specification do not necessarily refer to the same embodiments. Furthermore, the technical features, technical solutions and beneficial effects described in this embodiment can also be combined in any appropriate manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects may also be identified in specific embodiments that do not embody all embodiments.

Description of the drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are: For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of mobile communication network signal coverage in different scenarios provided by an embodiment of the present application;

Figure 2a is a schematic diagram of a terminal moving from a different network roaming area to a non-different network roaming area according to an embodiment of the present application;

Figure 2b is a schematic diagram of another terminal moving from a different network roaming area to a non-different network roaming area according to an embodiment of the present application;

Figure 3a is a schematic diagram of another terminal moving from a non-different network roaming area to a different network roaming area provided by an embodiment of the present application;

Figure 3b is a schematic diagram of a scenario in which another terminal moves from a non-different network roaming area to a different network roaming area according to an embodiment of the present application;

Figure 4 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

Figure 5 is a flow chart of a mobile communication network selection method provided by an embodiment of the present application;

Figure 6 is a flow chart of another mobile communication network selection method provided by an embodiment of the present application;

Figure 7 is a flow chart of yet another mobile communication network selection method provided by an embodiment of the present application;

Figure 8 is a flow chart of another mobile communication network selection method provided by an embodiment of the present application;

Figure 9 is a flow chart of yet another mobile communication network selection method provided by an embodiment of the present application;

Figure 10 is a flow chart of yet another mobile communication network selection method provided by an embodiment of the present application.

Detailed ways

The terms “first”, “second”, “third”, etc. in the description, claims and drawings of this application are used to distinguish different objects, rather than to limit a specific order.

In the embodiments of this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "such as" in the embodiments of the present application is not to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words "exemplary" or "such as" is intended to present the concept in a concrete manner.

In order to describe the following embodiments clearly and concisely, a brief introduction to related technologies is first given:

PLMN (Public Land Mobile Network) is interconnected with the Public Switched Telephone Network (PSTN) to form a regional or national-scale communication network.

RPLMN (Registered PLMN, registered PLMN) is the PLMN registered by the terminal before the last shutdown or disconnection, and is stored in the memory of the terminal.

EPLMN (Equivalent PLMN, equivalent PLMN) is a PLMN with the same status as the PLMN currently selected by the terminal.

EHPLMN (Equivalent Home PLMN, equivalent home PLMN) is a home PLMN with the same status as the PLMN currently selected by the terminal.

Home network (HPLMN), the operator's network signed by the user's SIM card is collectively called the home network.

Visited network (VPLMN), the terminal roams outside the home network. Through the roaming contract relationship, other operator networks related to the home network are called visited networks.

Shared network is a networking method formed by sharing base stations or core networks between two operators. For example, telecom operators and China Unicom operators jointly build and share 4G and 5G networks.

TAC (Tracking Area Code, tracking area code) is assigned by the operator itself and mainly serves as a unique identifier for mobile user positioning.

NV, the abbreviation of NVM (Non-Volatile Memory, non-erasable memory).

The following uses an example to illustrate the specific usage scenario of inter-network roaming. As shown in Figure 1, a schematic diagram showing cellular network signal coverage examples in different scenarios is shown.

In scenario 1, there is no signal coverage of the first network, only the 5G network signal coverage of the second network.

In scenario 2, there is 4G network signal coverage of the first network, but there is no 5G network signal of the first network, but there is 5G network signal coverage of the second network.

In scenario 3, the 5G and 4G network signals of the first network and the 5G network signal of the second network are covered.

For example, the first network may be a network jointly built and shared by telecom operators and China Unicom operators, referred to as China Telecom Network; the second network may be a mobile communication network built by mobile operators. Alternatively, the first network may be a mobile communication network built by a mobile operator; the second network may be a telecommunications network. This application does not limit the operators to which the first network and the second network belong.

If the terminal of the first network is in scenario 3, the terminal is in a non-different network roaming area and enjoys the coverage of the home network signal.

If the terminal of the first network is in scenario 2 and the terminal wants to use the 5G network signal, it needs to use the 5G network signal of the second network. In this case, the terminal is in a different network roaming area.

If the terminal of the first network is in scenario 1 and needs to use the 5G network signal of the second network, the terminal is in a different network roaming area.

The inventor of the present application has discovered through research that when a terminal moves from a different network roaming area to a non-different network roaming area, or moves from a non-different network roaming area to a different network roaming area, according to the traditional network selection method, it still selects the last time. Attempting to access a successfully registered network will increase the time and power consumption of the network search process.

For example, in one scenario, as shown in Figure 2a, terminal 2 moves from the coverage area of base station 1 corresponding to the visited network (i.e., the foreign network roaming area) to the coverage area of base station 3 corresponding to the home network (i.e., non-foreign network roaming area). network roaming area), in this case, according to the traditional network selection method, the terminal still tries to access the visited network, that is, it initiates a search for the frequency band of the visited network, attempts to access the visited network after failing, and then initiates access to the home network. This will As a result, the entire process of terminal accessing the network takes a long time and consumes high power, which reduces the speed of accessing the network and results in poor user experience.

As shown in Figure 2b, users of the Telecom network take transportation (such as airplanes) from the roaming area cells of different networks (the cells filled with gray in Figure 2) to the cells in the non-different network roaming areas (the cells filled with white in Figure 2). ). When the user is in a different network roaming area, the terminal device preferentially selects the N28 frequency band to access the visited network. When the user moves to a non-different network roaming area, the terminal device will still search for N28 and try to access the network, resulting in a time-consuming network search process. time and power consumption increase.

For another example, in another scenario, as shown in Figure 3a, the terminal moves from the coverage area of base station 3 corresponding to the home network (i.e., non-internet roaming area) to the coverage area of base station 1 corresponding to the visited network (i.e., inter-network roaming area). area), if the terminal still selects the frequency band of the home network and tries to access the home network, it cannot find the home network and then tries to access the visited network, resulting in increased time and power consumption in the network search process.

As shown in Figure 3b, mobile network users take transportation (such as airplanes) from the non-internet roaming area (the white-filled cell in Figure 3) to the inter-network roaming area (the gray-filled cell in Figure 3). When the terminal device is in a cell in a non-different network roaming area, the N28 frequency band is preferred to access the home network. When the terminal device moves to a cell in a different network roaming area, the terminal device will still give priority to searching for the N28 frequency band to try to access the network, but the search Not using the N28 frequency band will increase the time and power consumption of the network search process.

Figures 2b and 3b are only illustrations of a specific example, and the types of mobile communication networks and types of vehicles here are illustrative illustrations. For terminals using other operator's networks, when they move from the operator's inter-network roaming area to a non-extra-network roaming area, or from a non-extra-network roaming area to an inter-network roaming area, the above problems also exist, which are not discussed here. Again.

In order to solve the above problem, the inventor of the present application provides a mobile communication network selection method. This method maintains a foreign network roaming area list and a non-foreign network roaming area list on the terminal side. The records in the foreign network roaming area list belong to the foreign network roaming area. In the same way, the location information belonging to non-different network roaming areas is recorded in the non-different network roaming area list. When the location information of the terminal changes, the area where the terminal is currently located is queried based on the above list. If it currently reaches a non-different network roaming area, the frequency band of the home network is selected for network search and access. If you currently reach a different network roaming area, select the frequency band of the visited network to search for the network and access it. It can be seen that this solution can identify the type of area where the terminal is currently located based on the location information of the terminal. Furthermore, it can select the network frequency band that matches the current area for network search and access, thereby realizing rapid access of the terminal to the area where it is currently located. In a network that matches the region, the time-consuming process of the entire network search process is reduced, power consumption is reduced, network access speed is increased, and user experience is improved.

The structure of a terminal device applying the mobile communication network selection method provided by this application may be the schematic structural diagram of the terminal device shown in FIG. 4 .

As shown in Figure 4, the terminal device may include a processor, a memory, a display screen, a SIM card interface, an audio module, a mobile communication module and a wireless communication module, where the audio module includes a speaker, receiver, microphone, and headphone interface.

Memory may be used to store computer executable program code, which includes instructions.

The processor can execute instructions stored in the memory to perform various functional applications and data processing of the terminal device. For example, in the embodiment of the present application, the processor can perform the mobile communication network selection method provided by the embodiment of the present application by executing instructions stored in the memory.

Mobile communication modules can provide wireless communication solutions including 2G/3G/4G/5G applied to terminal equipment.

The wireless communication module can provide applications on terminal devices including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) network), Bluetooth (bluetooth, BT), global navigation satellite system (global navigation satellite system) navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (infrared, IR) and other wireless communication solutions.

The GNSS may include global positioning system (GPS), global navigation satellite system (GLONASS), Beidou navigation satellite system (BDS), quasi-zenith satellite system (quasi -zenith satellite system (QZSS) and/or satellite based augmentation systems (SBAS).

The SIM card interface is used to connect the SIM card. The SIM card can be connected and separated from the terminal device by inserting it into the SIM card interface or pulling it out from the SIM card interface. The terminal device can support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface can support Nano SIM card, Micro SIM card, SIM card, etc. Multiple cards can be inserted into the same SIM card interface at the same time. The types of the plurality of cards may be the same or different. The SIM card interface is also compatible with different types of SIM cards. The SIM card interface is also compatible with external memory cards. The terminal device interacts with the network through the SIM card to implement functions such as calls and data communications.

In some embodiments, the terminal device uses an eSIM, that is, an embedded SIM card. The eSIM card can be embedded in the terminal device and cannot be separated from the terminal device.

The implementation process of the mobile communication network selection method applied to the above terminal equipment will be introduced in detail below with reference to the accompanying drawings:

(1) The terminal is located in different areas and the network search frequency bands supported by the terminal are different.

Example 1:

Please refer to Figure 5, which shows a flow chart of a mobile communication network selection method provided by an embodiment of the present application. The method is applied to the terminal shown in Figure 4. As shown in Figure 5, the method includes the following steps:

S110: When a change in the terminal's location information is detected, the type of area to which the terminal's current location belongs is determined based on a preset location information list corresponding to different types of areas.

In an exemplary embodiment of the present application, the type of area may include a foreign network roaming area and a border area, where the border area is a non-foreign network roaming area and the boundary between the foreign network roaming area and the non-foreign network roaming area.

Of course, in other embodiments, the area type is only divided into a foreign network roaming area and a non-foreign network roaming area, and no boundary area is divided, which will not be described again here.

In a possible implementation manner of this application, the location information may be the TAC where the terminal resides.

In this scenario, the terminal can record the area type to which the terminal's resident TAC belongs, thereby obtaining the TAC list corresponding to the foreign network roaming area, non-different network roaming area, and border area.

When the terminal switches from one TAC to another, it obtains the currently accessed TAC and queries the foreign network roaming area TAC list and non-different network roaming area TAC list to determine the type of area to which the currently accessed TAC belongs.

In another possible implementation, the location information may also be positioning data of the terminal, and the positioning data may be location data obtained through the navigation module of the terminal.

In this scenario, the terminal can be preset with a list of locations for roaming areas in different networks and a list of locations for non-extra-network roaming areas. When a change in the positioning data of the terminal is detected, the foreign network roaming area location list and the non-different network roaming area location list are queried to determine the type of area where the terminal is currently located.

S120, determine whether the type of the area where the terminal is currently located is the same as the area where it was last located; if the terminal moves from a non-extra-network roaming area to an ex-extra-network roaming area (or border area), execute S130; if the terminal moves from an ex-extra-network roaming area (or border area) moves to a non-different network roaming area, then execute S140.

For example, if the terminal is currently in a non-different network roaming area and the last area it was in was a different network roaming area (or border area), or if it is currently in a different network roaming area and the last area it was in was a non-different network roaming area, Then it is determined that the area type where the terminal is located has changed.

S130: Set the network search frequency band of the terminal including the frequency point or frequency band of the accessed network.

If it is determined that the terminal arrives in a different network roaming area from a non-different network roaming area (or border area), the network search frequency band of the terminal is set to include the frequency point or frequency band of the visited network. For example, the terminal may support frequency bands of both the home network and the visited network, or may only support the frequency bands of the visited network, as long as the network frequency bands supported by the terminal include the frequency bands of the visited network.

For example, if an end user of a telecom operator travels from an area covered by China Telecom 5G network signal to an area not covered by China Telecom 5G network signal but with mobile 5G network signal, that is, from a non-internet roaming area to an inter-network roaming area, this In this case, the network frequency band set for the terminal includes the frequency point or frequency band of the mobile network, such as the N28 and N41 frequency bands.

S140: Set the network search frequency band to a frequency point or frequency band that supports the home network.

For example, if a terminal user of a telecom operator travels from a different network roaming area to a non-different network roaming area, the network frequency band of the terminal is set to only support the frequency points or frequency bands of the telecommunications network, such as N78, N1, N8, N5, etc. In this scenario, the terminal does not support mobile network frequency bands such as N28 and N41.

In an exemplary embodiment, the network search frequency band supported by the terminal can be set by dynamically setting NV. The NV dynamic configuration method is a commonly used modem configuration method and will not be described again here.

In another exemplary embodiment, the network search frequency band supported by the terminal can be set by calling an API (Application Programming Interface) interface.

S150, according to the supported frequency points or frequency bands, perform network search and access.

Based on the movement trajectory of the terminal, the network frequency band supported by the terminal is dynamically set, so that the terminal searches the network according to the set network frequency band, which shortens the time-consuming process of the network search process. At the same time, it reduces the power consumption of the network search process and improves the user experience.

Example 2:

Please refer to FIG. 6 , which shows a flow chart of another mobile communication network selection method provided by an embodiment of the present application. This embodiment determines the type of area where the terminal is located based on changes in the TAC where the terminal resides.

As shown in Figure 6, the terminal includes a scene recognition module, a NAS module and an NR RRC module.

The scene recognition module is used to determine the type of area where the terminal is currently located based on the TAC resident during the movement of the terminal, such as a different network roaming area and a non-different network roaming area.

The NAS (Non Access Stratum, non-access layer) module is used to obtain the TAC resident during the movement of the terminal. Among them, NAS exists in the wireless communication protocol stack of UMTS (Universal Mobile Telecommunications System) as a functional layer between the core network and user equipment. This layer supports signaling and data transfer between the two.

NR RRC module, used to set the frequency bands supported by network search.

As shown in Figure 6, the method may include the following steps:

S210. The NR RRC module sends a cell selection search message to the base station on the mobile communication network side.

S220: The base station returns a system message to the NR RRC module. The system message includes the TAC and cell ID of the cell where the terminal currently resides.

In the LTE network, TAC defines the tracking area code to which the cell belongs. A tracking area can cover one or more cells. The core network pages cells through TAC.

S230: The NR RRC module parses the system message and obtains the cell ID and TAC of the current resident cell.

S240, the NR RRC module sends the TAC and cell ID to the NAS module.

S250, the NAS module sends TAC to the scene recognition module.

S260: The scene recognition module queries the preset foreign network roaming area TAC list, non-different network roaming area TAC list and border area TAC list to determine the target network to which the current resident cell belongs.

In an exemplary embodiment, the terminal maintains three lists, which are a foreign network roaming area TAC list, a non-foreign network roaming area TAC list, and a border area TAC list.

When the terminal accesses a new TAC, it will determine whether the network to which the TAC belongs is the visited network or the home network, and then record the TAC into the corresponding list, thereby updating the list.

For example, if the terminal receives the shared PLMN delivered by the base station, the TAC is recorded in the TAC list of the different network roaming area. If the terminal does not receive the shared PLMN delivered by the base station, the TAC is recorded in the TAC list of the non-different network roaming area. If the terminal receives the change back and forth between the shared PLMN and the non-shared PLMN, the TAC is recorded in the border area TAC list.

When the scene recognition module receives the TAC sent by the NAS module, it queries the above three TAC lists in sequence to determine the type of network to which the current resident cell belongs.

For example, if the TAC of the cell where the terminal currently resides is included in the TAC list of the foreign network roaming area, it is determined that the terminal is currently in the foreign network roaming area. If the SIM card currently used by the terminal is a registered user of China Telecom (or China Unicom), it is determined that the cell where the terminal currently resides is a network operated by China Mobile. In the same way, if the SIM currently used by the terminal is a registered mobile user, it is determined that the cell where the terminal currently resides belongs to the Telecom Network.

S270: When it is determined that the network where the terminal is located has changed, the scene recognition module delivers a frequency band setting message that matches the target network to the NR RRC module.

In the embodiment of the present application, when the scene recognition module identifies that the target network to which the current resident TAC belongs is different from the last determined network (that is, when it is determined that the network where the terminal is located has changed), it issues the same message to the NR RRC module. The frequency band setting message matches the determined target network. For example, the network where the terminal is currently located is the China Telecom Network, and the network it was in last time was the mobile operator's network. Or, the network it is currently in is the mobile operator's network, and the network it was in last time was the China Telecom Network. Then determine the network where the terminal is. network changes.

In an exemplary embodiment, the NR RRC module calls an API related to frequency band setting to set the supported network frequency band based on the frequency band setting message sent by the scene module.

In another exemplary embodiment, the NR RRC module can also set the supported network frequency band based on dynamically setting NV, which will not be described again here.

In one scenario, if the scene recognition module identifies that the cell where the terminal currently resides belongs to the network corresponding to the roaming area (or border area) of a different network, and the last mainstream cell belongs to a roaming area of a non-different network, it is recognized that the terminal has never been in a roaming area of a different network. If the network roaming area moves to a different network roaming area, a setting message containing the frequency point or frequency band of the visited network is sent to the NR RRC module to set the network frequency band. The NR RRC module sets the frequency band capabilities supported by the NR RRC module based on the received frequency band setting message.

For example, if the terminal is currently using a SIM card to be a registered user of China Telecom (or China Unicom), the visited network is the mobile operator's network. When the terminal moves from an area covered by China Telecom's 5G signal to an area that is not covered by China Telecom's 5G signal and has China Mobile's 5G When the signal covers the area, the NR RRC module sets the network frequency band to include the frequency band of the mobile operator's 5G network signal, such as the N28 and N41 frequency bands.

In an exemplary embodiment, the terminal can support both the China Telecom 5G frequency band and the mobile 5G frequency band, or can also be set to support only the mobile 5G frequency band. In this way, the terminal can use the mobile 5G frequency band to conduct network searches, thereby shortening the network search process. time consuming and reduce power consumption.

For another example, if the terminal currently uses a SIM card to register as a mobile registered user, the visited network is the Telecom Network. In this scenario, the frequency bands supported by the NRRRC module need to include the frequency bands of the Telecom 5G network, such as N78, N1, N8, N5 and other frequency bands. . In this way, the terminal can use the China Telecom 5G frequency band to conduct network searches, shortening the time-consuming network search process and reducing power consumption.

In another scenario, if the cell where the terminal currently resides belongs to the network corresponding to the non-foreign network roaming area, and the last cell where the terminal resides belongs to the foreign network roaming area, it is determined that the terminal moves from the foreign network roaming area to the non-foreign network roaming area. area. In this scenario, a network band setting message is sent to the NR RRC module. The network band setting message is used to set the network search band of the terminal to only support the frequency band of the home network and does not support the frequency band of the visited network. This prevents the terminal from still using the frequency band of the visited network for network search after moving from a different network roaming area to a non-different network roaming area.

For example, if the end user is a registered user of China Telecom (or China Unicom), the home network is the China Telecom Network. In this scenario, the NR RRC module is set to only support the frequency band of the China Telecom Network.

For another example, if the end user is a registered mobile user, the home network is the mobile operator's network. In this scenario, the NR RRC module is set to only support the frequency band of the mobile operator's network.

The above is explained using the 5G network as an example. In scenarios where other types of mobile communication networks are used, the frequency bands that NR RRC needs to be set to support are determined based on the frequency bands allocated to different operators, which will not be described again here.

S280, the NR RRC module updates the network frequency bands supported by the NR RRC module based on the frequency band setting message.

In an exemplary embodiment, the frequency band setting message carries information of the target frequency band. The NR RRC module parses the frequency band setting message, obtains relevant information about the target frequency band, and further updates the network frequency band supported by the NR RRC module to the target frequency band.

For example, the home network of the terminal is the Telecommunications Union network. If the terminal moves from a non-different network roaming area to a different network roaming area (or border area), the network frequency bands supported by the NR RRC module include the frequency bands of the mobile operator network. In this scenario, for mobile network terminals, the network frequency bands supported by the NR RRC module need to be increased by the frequency bands of the telecommunications network.

S290, the NR RRC module sends the supported frequency point or frequency band information to the base station, so that the base station can synchronously update the terminal to support frequency band capability changes.

S2100: The NR RRC module searches for the cell corresponding to the target frequency band and accesses it.

After the NR RRC module updates the supported network frequency band, it selects a cell according to the new frequency band and accesses the cell.

In the mobile communication network selection method provided by this embodiment, the terminal device maintains and updates the foreign network roaming area TAC list, the non-different network roaming area TAC list, and the border area TAC list. When it is detected that the terminal's current resident TAC changes, the type of network to which the terminal currently resides in the cell is queried based on the above three lists. If the terminal moves from a non-different network roaming area to a different network roaming area, or if the terminal moves from a non-different network roaming area to a border area, set the network frequency bands supported by the terminal to include the frequency band of the visited network. If the terminal travels from a different network roaming area to a non-different network roaming area, set the network frequency band supported by the terminal to the frequency band of the home network. It can be seen that this solution can identify the type of area where the terminal currently resides based on the cell where the terminal resides, and further, prioritize the network frequency band that matches the current area for network search and access, thereby achieving rapid access of the terminal to the current location. In a network that matches the area, it reduces the time-consuming process of the entire network access process, while reducing power consumption, improving network access speed and access speed, and improving user experience.

Embodiment three:

Please refer to FIG. 7 , which shows a flow chart of yet another mobile communication network selection method provided by an embodiment of the present application. This embodiment determines the type of area where the terminal is located based on changes in positioning data of the terminal. The terminal module involved in this embodiment includes a positioning module, a scene recognition module and an NR RRC module.

The positioning module is used to obtain the geographical location information of the terminal device, such as the longitude and latitude information of the current location of the terminal device.

In addition, the scene recognition module and the NR RRC module have the same functions as the corresponding modules in the embodiment shown in Figure 6, and will not be described again here.

As shown in Figure 7, the method may include the following steps:

S300: The cloud server sends a different network roaming area location list, a non-different network roaming area location list and a border area location list to the terminal.

The terminal can obtain a location list corresponding to different areas from a server (such as a cloud server), and the cloud server obtains a list of three areas corresponding to each operator based on the base station distribution of each operator.

For example, the cloud server can obtain the location list of the different network roaming areas, non-different network roaming areas and border areas of the China Telecom Network based on the distribution of 5G communication base stations of the China Telecom Network and the 5G communication base stations of mobile operators.

For example, you can record the area covered only by the 5G network signal of the mobile operator into the location list of the different network roaming areas of the China Telecom Network; record the area covered by the 5G network signal of the China Telecom Network into the non-differential roaming area list of the China Telecom Network. In the network roaming area location list; record the boundary area between the 5G network signal coverage area of the Telecom Network and the boundary area of the mobile operator's 5G signal coverage area into the boundary area location list.

In addition, the three lists corresponding to mobile operators are obtained in similar ways and will not be described again here.

In another exemplary embodiment of the present application, the area type to which the geographical location belongs can be determined based on the Hu Huanyong Line of population geographical distribution. For example, densely populated areas can be directly recorded into the non-different network roaming area list, and sparsely populated areas can be directly recorded in the list of non-different network roaming areas. Recorded as a foreign network roaming area list. In this way, the amount of data in the three lists can be reduced, saving the storage space of the terminal, and at the same time, improving the speed of list query.

In an exemplary embodiment, when the terminal leaves the factory, the above three lists corresponding to each operator are stored in the terminal. Alternatively, after the SIM card is installed in the terminal, a list matching the registered networks of the currently used SIM card can be obtained from the cloud server. For example, if a telecom SIM card is installed in the terminal, the list of three areas corresponding to the telecom network is obtained from the cloud server.

In addition, the terminal can actively download the latest list from the server, or the server can also actively push the latest list to the terminal. This application does not limit the update method of the terminal list.

S310: When the positioning module detects that the position change of the terminal is greater than the distance threshold, it reports the current geographical location to the scene recognition module.

In an exemplary embodiment, the distance threshold may be determined according to the base station coverage. For example, the distance threshold may be equal to N times the base station coverage distance, where N may be greater than or equal to 1.

The positioning module can obtain the positioning data (such as longitude and latitude) of the terminal's current location at specified time intervals, and compare the distance between the currently obtained positioning data and the last obtained positioning data. If the distance is greater than the distance threshold, it will report to the scene recognition module Report the positioning data of the current location of the terminal.

For example, the terminal can obtain positioning data through the GNSS communication solution supported by the wireless communication module, which will not be described in detail here.

S320: The scene recognition module queries the above three location lists to obtain the target area to which the current geographical location belongs.

For example, if the current geographical location is included in the foreign network roaming area location list, it is determined that the terminal is currently in the foreign network roaming area. If the location list of non-different network roaming areas contains the current geographical location, it is determined that the terminal is currently in a non-different network roaming area. If the border area location list contains the current geographical location, it is determined that the terminal is currently in the border area.

S330: When it is determined that the type of the area where the terminal is located has changed, the scene recognition module determines the target frequency band that matches the target area, and sends the frequency band setting message to the NR RRC module.

In an exemplary embodiment, when the scene recognition module identifies that the type of the area where the terminal is currently located is different from the type of the area where the terminal was last located, it sends a frequency band setting message to the NR RRC module. For example, if the terminal is currently in a non-different network roaming area and was in a different network roaming area (or border area) last time, or if it is currently in a different network roaming area (or border area) and was in a non-different network roaming area last time, then determine that the terminal The type of area changes.

After the scene recognition module identifies the target area to which the current geographical location belongs, it determines the network corresponding to the terminal when it is in a different area according to the registered network of the terminal's SIM card, that is, the visited network or the home network. Further, determine the frequency band that matches the target area, that is, the target frequency band.

For terminals whose home network is the China Telecom (or China Unicom) operator's network, the visited network is the mobile operator's network. Therefore, the target frequency band corresponding to the different network roaming area includes the frequency band of the mobile operator's network, such as the N28 and N41 frequency bands. The target frequency band corresponding to the non-different network roaming area is the frequency band of the China Telecom Network, such as N78, N1, N8, N5 and other frequency bands. The target frequency band corresponding to the border area is the same as the roaming area of the different network.

Similarly, for a terminal whose home network is a mobile operator's network, the frequency band corresponding to the roaming area of a different network includes the frequency band of the China Telecom Network; the frequency band corresponding to the roaming area of a non-different network is the frequency band of the mobile operator's network.

S340, the NR RRC module updates the network frequency bands supported by the NR RRC module based on the frequency band setting message.

The process of setting the supported network frequency bands by the NR RRC module in this embodiment is the same as the frequency band setting process in the embodiment shown in Figure 6, and will not be described again here.

S350, the NR RRC module sends the supported frequency point or frequency band information to the base station, so that the base station can synchronously update the terminal's supported frequency band capabilities.

S360, the NR RRC module searches for the cell corresponding to the target frequency band and accesses it.

In the mobile communication network selection method provided by this embodiment, the terminal maintains a location list corresponding to a different network roaming area, a non-different network roaming area, and a border area. When it is detected that the location change of the terminal exceeds the distance threshold, the type of area where the terminal is currently located is queried based on the above list. If the terminal moves from a non-different network roaming area to a different network roaming area, or if the terminal moves from a non-different network roaming area to a border area, set the network frequency band supported by the terminal to the frequency band of the visited network. If the terminal travels from a different network roaming area to a non-different network roaming area, set the network frequency band supported by the terminal to the frequency band of the home network. It can be seen that this solution can identify the type of area where the terminal is currently located based on the cell where the terminal resides. Furthermore, it can select the network frequency band that matches the current area for network search and access, thereby realizing rapid access of the terminal to the area where it is currently located. In a network that matches the region, the time-consuming process of the entire network search process is reduced, power consumption is reduced, network access speed is increased, and user experience is improved.

(2) The terminal is located in different areas and has different network frequency band priorities.

Embodiment 4:

Please refer to FIG. 8 , which shows a flow chart of another mobile communication network selection method provided by an embodiment of the present application.

The difference between this embodiment and the embodiment shown in Figure 5 is that in this embodiment, based on the fact that the terminals are in different areas and the set priorities of the network frequency bands are different, the network frequency band with a higher priority is searched first. This embodiment is applicable to a scenario where the network frequency bands supported by the terminal device include the frequency band of the home network and the frequency band of the visited network.

As shown in Figure 8, the method may include the following steps:

S410: When it is detected that the terminal's location information changes, determine the type of area to which the terminal's current location belongs based on a preset location information list corresponding to different types of areas.

S420, determine whether the type of the area where the terminal is currently located has changed from the area where it was last located; if the terminal moves from a non-different network roaming area to a different network roaming area (or the terminal is currently in a border area), execute S430; if the terminal moves from a different network to a different network roaming area When the roaming area reaches the non-different network roaming area, perform S440.

S430: Set the priority of the frequency band of the visited network to be higher than the frequency band of the home network.

For example, for a terminal whose home network is a telecommunications operator's network, the visited network is a mobile operator's network. In this scenario, if the terminal goes from a non-different network roaming area to a different network roaming area, or from a non-different network roaming area to a border area, it is necessary to set the priority of the frequency band of the mobile operator network to be higher than that of the China Telecom Network. frequency band.

For another example, for a terminal whose home network is a mobile operator's network and the visited network is a China Telecom network, if the terminal is in a different network roaming area or a border area, set the frequency band priority of the China Telecom network to be higher than that of the mobile operator's network. frequency band.

S440: Set the frequency band of the home network to have a higher priority than the frequency band of the visited network.

For example, for a terminal whose home network is a telecommunications operator's network, the visited network is a mobile operator's network. In this scenario, if the terminal moves from a different network roaming area to a non-different network roaming area, the frequency band of the China Telecom Network is set to have a higher priority than the frequency band of the mobile operator network. That is, priority is given to using the frequency band of the telecommunications network for network searches.

For another example, for a terminal whose home network is a mobile operator network and the visited network is a China Telecom network, if the terminal moves from a different network roaming area or a border area to a non-different network roaming area, the frequency band of the mobile operator network is set. The frequency band has a higher priority than the telecommunications network. That is, priority is given to using the frequency band of the mobile operator's network for network searches.

S450 performs network search and access in order of frequency band priority from high to low.

This embodiment is applied in a scenario where the terminal supports both the frequency band of the home network and the frequency band of the visited network. Depending on the area where the terminal is located, set the frequency band matching the area to have a higher priority than the frequency bands of other networks. If the terminal moves from a non-different network roaming area to a different network roaming area, set the frequency band priority of the visited network to be higher than the home network. The frequency band of the network; if the terminal moves from a different network roaming area to a non-different network roaming area, set the frequency band of the home network to be higher than the frequency band of the visited network. When accessing the network, the network search is performed in order of priority from high to low. If the high-priority frequency band cannot be successfully accessed, the search continues for the low-priority frequency band.

Embodiment five:

In an exemplary embodiment of the present application, as shown in Figure 9, the type of area where the terminal is located can be determined based on changes in the TAC where the terminal currently resides.

As shown in Figure 9, the method may include the following steps:

S510: The NR RRC module sends a cell selection search message to the base station on the mobile communication network side.

S520: The base station returns a system message to the NR RRC module. The system message includes the TAC and cell ID of the cell where the terminal currently resides.

S530: The NR RRC module parses the system message and obtains the cell ID and TAC of the current resident cell.

S540, the NR RRC module sends the TAC and cell ID to the NAS module.

S550: The NAS module sends TAC to the scene recognition module.

S560: The scene recognition module queries the preset foreign network roaming area TAC list, non-different network roaming area TAC list and border area TAC list to determine the target network to which the resident cell belongs.

S570: When the network where the terminal is located changes, the scene recognition module sends a frequency band priority setting message to the NR RRC module.

Among them, the frequency band priority setting message is used to cause the NR RRC module to set the priority of the frequency band corresponding to the target network to be higher than the frequency bands of other networks.

In the embodiment of the present application, when the scene recognition module identifies that the target network to which the currently resident TAC belongs is different from the last determined network, it sends a frequency band priority setting message to the NR RRC module.

In an exemplary embodiment, the NR RRC module can call an API related to frequency band setting to set the priorities of different network frequency bands based on the frequency band priority setting message sent by the scene module.

In another exemplary embodiment, the NR RRC module can also set priorities corresponding to frequency bands of different networks based on dynamically setting NV, which will not be described again here.

If the scene recognition module identifies the change trajectory of the cell where the terminal resides and determines that the terminal has moved from a non-different network roaming area to a different network roaming area (or border area), it instructs the NR RRC module to set the frequency band of the visited network to have a higher priority than the home network. Network frequency band.

If it is determined that the terminal moves from a different network roaming area (or a border area) to a non-different network roaming area, the NRRRC module is instructed to set the priority of the frequency band of the home network to be higher than the frequency band of the visited network.

S580, the NR RRC module updates the priority of the network band in the NR RRC module based on the frequency band priority setting message.

In an exemplary embodiment, the frequency band priority setting message carries the frequency band priorities of the home network and the visited network. The NR RRC module sets the priorities of frequency bands of different networks supported by the NR RRC module based on the frequency band priority setting message.

S590, the NR RRC module performs network search and access in order of priority from high to low.

After the NR RRC module updates the priorities of the frequency bands of different networks, it will first search for the network corresponding to the frequency band with the highest priority in order of priority from high to low. If the network in this frequency band cannot be successfully accessed, it will continue to search for the next priority. The network corresponding to the frequency band.

In the mobile communication network selection method provided by this embodiment, the terminal maintains TAC lists corresponding to the different network roaming areas, non-extra network roaming areas, and border areas. When it is detected that the TAC where the terminal currently resides changes, the type of the area to which the cell where the terminal currently resides is determined based on the TAC lists of the above three areas. If the area type changes, the priority of the target frequency band corresponding to the changed area is set higher than the frequency bands of other networks. It can be seen that this solution can identify the type of area where the terminal is currently located based on the cell where the terminal resides, and preferentially select the network frequency band that matches the current area for network search and access, thereby realizing rapid access of the terminal to the area where it is currently located. In a network that matches the region, the time-consuming and power consumption of the entire network search process is reduced, the network access speed is improved, and the user experience is improved.

Embodiment 6:

As shown in Figure 10, in another exemplary embodiment, the terminal can also determine the type of area where the terminal is located based on changes in the terminal's positioning data. The method may include the following steps:

S600: The cloud server sends the foreign network roaming area location list, the non-different network roaming area location list and the border area location list to the terminal.

S610: When the positioning module detects that the position change of the terminal is greater than the distance threshold, it reports the current geographical location to the scene recognition module.

S620: The scene recognition module queries the above three location lists to obtain the target area to which the current geographical location belongs.

For the specific implementation process of S600-S620 in this embodiment, please refer to the specific implementation process of S300-S320 in the corresponding embodiment in Figure 7, which will not be described again here.

S630: When it is determined that the type of the area where the terminal is located changes, the scene recognition module determines the target frequency band that matches the target area, and sends the frequency band priority setting message to the NR RRC module.

In this embodiment, when the scene recognition module identifies that the area type where the terminal is currently located is different from the last area type, it sends a frequency band priority setting message to the NR RRC module.

The process of determining the target frequency band in this step is the same as the process of determining the target frequency band in S330 in the corresponding embodiment of FIG. 7 , and will not be described again here.

S640: The NR RRC module updates the priority of the network frequency band in the NR RRC module based on the frequency band priority setting message.

S650, the NR RRC module performs network search and access in order of priority from high to low.

The specific implementation process of S630-S650 can be referred to the implementation process of S580-S5100 in the embodiment shown in FIG. 9, which will not be described again here.

In the mobile communication network selection method provided by this embodiment, the terminal maintains a location list corresponding to a different network roaming area, a non-different network roaming area, and a border area. When it is detected that the location change of the terminal exceeds the distance threshold, the type of area where the terminal is currently located is queried based on the above list. If the terminal moves from a non-different network roaming area to a different network roaming area, or if the terminal moves from a non-different network roaming area to a border area, the frequency band of the visited network is set to have a higher priority than the frequency band of the home network. If the terminal travels from a different network roaming area to a non-different network roaming area, the frequency band of the home network is set to have a higher priority than the frequency band of the visited network. It can be seen that this solution can identify the type of area where the terminal currently resides based on the cell where the terminal resides, and further, prioritize the network frequency band that matches the current area for network search and access, thereby achieving rapid access of the terminal to the current location. In a network that matches the area, it reduces the time and power consumption of the entire network search process, increases network access speed, and improves user experience.

Through the above description of the embodiments, those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be allocated as needed. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working processes of the systems, devices and units described above, reference can be made to the corresponding processes in the foregoing method embodiments, which will not be described again here.

In the several embodiments provided in this embodiment, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of 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 The combination can either be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units 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 or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of this embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or 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 computer-readable storage medium. Based on this understanding, the technical solution of this embodiment is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to cause a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment. The aforementioned storage media include: flash memory, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk and other media 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 thereto. Any changes or substitutions within the technical scope disclosed in the present application shall be covered by the protection scope of the present application. . Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (13)

1. A mobile communication network selection method, applied to a terminal device, the method comprising:

if the terminal equipment receives the shared public land mobile network PLMN sent by the mobile communication network, recording the TAC of the current resident cell into a TAC list of a roaming area of the different network;

if the terminal equipment receives the non-shared PLMN sent by the mobile communication network, recording the TAC of the current resident cell into a non-heterogeneous roaming area TAC list;

when detecting that the position information of the terminal equipment changes, inquiring a position information list corresponding to different types of areas, and determining the type of the area where the terminal equipment is located, wherein the position information list comprises a heterogeneous roaming area TAC list and a non-heterogeneous roaming area TAC list, and the type of the area comprises a heterogeneous roaming area and a non-heterogeneous roaming area;

If the terminal equipment moves from the heterogeneous network roaming area to the non-heterogeneous network roaming area, performing network searching based on the frequency band of the home network of the terminal equipment;

and if the terminal equipment moves from the non-heterogeneous network roaming area to the heterogeneous network roaming area, performing network searching based on the frequency band of a visiting network of the terminal, wherein the visiting network is a non-home network of the terminal equipment.

2. The method according to claim 1, wherein the method further comprises:

and if the terminal equipment receives the alternate change of the shared PLMN and the non-shared PLMN, recording the TAC of the cell where the terminal equipment currently resides into a boundary area TAC list.

3. The method according to claim 1 or 2, wherein the type of area further comprises a border area in the vicinity of the foreign network roaming area and the non-foreign network roaming area; the method further comprises the steps of:

if the terminal equipment moves from the boundary area to the non-heterogeneous network roaming area, performing network searching based on the frequency band of the home network of the terminal equipment;

and if the terminal equipment moves from the non-heterogeneous network roaming area to the boundary area, performing network searching based on the frequency band of the visiting network of the terminal equipment.

4. The method of claim 2, wherein when detecting that the location information of the terminal device changes, querying a location information list corresponding to different region types, and determining the region type in which the terminal device is located includes:

when the TAC of the current resident cell of the terminal equipment changes, respectively inquiring whether the TAC list of the different network roaming area, the TAC list of the non-different network roaming area and the TAC list of the boundary area comprise the TAC of the current resident cell or not;

if the TAC list of the heterogeneous network roaming area contains the TAC of the current resident cell, determining that the terminal equipment is in the heterogeneous network roaming area;

if the non-heterogeneous network roaming area TAC list contains the TAC of the current resident cell, determining that the terminal equipment is in a non-heterogeneous network roaming area;

and if the boundary area TAC list contains the TAC of the current resident cell, determining that the terminal equipment is in the boundary area.

5. The method of claim 1, wherein after determining that the terminal device has moved from the foreign network roaming region to the non-foreign network roaming region, the method further comprises: setting a network frequency band supported by the terminal equipment as a frequency band of the home network;

After determining that the terminal device moves from the non-foreign network roaming region to the foreign network roaming region, the method further includes: and setting the network frequency band supported by the terminal equipment to comprise the frequency band of the visiting network.

6. The method according to claim 2, wherein the method further comprises:

if the terminal equipment moves from the boundary area to the non-heterogeneous network roaming area, setting a network frequency band supported by the terminal equipment as a frequency band of the home network;

and if the terminal equipment moves from the non-heterogeneous network roaming area to the boundary area, setting the network frequency band supported by the terminal equipment to comprise the frequency band of the visiting network.

7. The method of claim 1, 2, 5 or 6, wherein after determining that the terminal device moves from the foreign network roaming region to the non-foreign network roaming region, the method further comprises: setting the frequency band of the home network to be higher than the frequency band of the visit network;

after determining that the terminal device moves from the non-foreign network roaming region to the foreign network roaming region, the method further includes: setting the frequency band of the visit network to be higher than the frequency band of the home network.

8. The method of claim 7, wherein the method further comprises:

if the terminal equipment moves from the boundary area to the non-heterogeneous network roaming area, setting the frequency band of the home network to have higher priority than the frequency band of the visit network;

and if the terminal equipment moves from the non-heterogeneous network roaming area to the boundary area, setting the frequency band of the visiting network to be higher in priority than the frequency band of the home network.

9. A mobile communication network selection method, applied to a terminal device, the method comprising:

acquiring a non-heterogeneous network roaming area position list, a heterogeneous network roaming area position list and a boundary area position list from a server, wherein the non-heterogeneous network roaming area position list comprises an area covered by a home network, the heterogeneous network roaming area position list comprises an area covered by a visiting network and not covered by the home network, and the boundary area position list comprises an area positioned at the boundary of the coverage area of the home network and positioned at the boundary of the coverage area of the visiting network; or, the non-heterogeneous network roaming area location list comprises a densely populated area, the heterogeneous network roaming area location list comprises a sparsely populated area, and the boundary area location list comprises boundary areas of the densely populated area and the sparsely populated area;

When detecting that the position information of the terminal equipment changes, inquiring a non-heterogeneous network roaming area position list, a heterogeneous network roaming area position list and a boundary area position list, determining the type of the area where the terminal equipment is positioned,

if the terminal equipment moves from the heterogeneous network roaming area to the non-heterogeneous network roaming area, performing network searching based on the frequency band of the home network of the terminal equipment;

if the terminal equipment moves from the non-heterogeneous network roaming area to the heterogeneous network roaming area, performing network searching based on a frequency band of a visiting network of the terminal, wherein the visiting network is a non-home network of the terminal equipment;

if the terminal equipment moves from the boundary area to the non-heterogeneous network roaming area, performing network searching based on the frequency band of the home network of the terminal equipment;

and if the terminal equipment moves from the non-heterogeneous network roaming area to the boundary area, performing network searching based on the frequency band of the visiting network of the terminal equipment.

10. The method of claim 9, wherein when detecting that the location information of the terminal device changes, querying a location information list corresponding to preset different region types, and determining the region type in which the terminal device is located includes:

Inquiring whether the current positioning data of the terminal equipment is included in a different network roaming area position list, a non-different network roaming area position list and a boundary area position list when the positioning data of the terminal equipment is changed;

if the position list of the different network roaming area contains the current positioning data, determining that the terminal equipment is in the different network roaming area;

if the non-heterogeneous network roaming area position list contains the current positioning data, determining that the terminal equipment is in a non-heterogeneous network roaming area;

and if the boundary area position list contains the current positioning data, determining that the terminal equipment is in a boundary area.

11. A terminal device, characterized in that the terminal device comprises: one or more processors, memory, and a touch screen; the memory is used for storing program codes; the processor is configured to execute the program code to cause the terminal device to implement a mobile communication network selection method according to any of claims 1 to 10.

12. A computer readable storage medium having stored thereon instructions which, when run on a terminal device, cause the terminal device to perform the mobile communication network selection method according to any of claims 1 to 10.

13. A chip system, comprising: at least one processor and an interface for receiving code instructions and transmitting to the at least one processor; the at least one processor executing the code instructions to implement the mobile communication network selection method of any one of claims 1 to 10.