WO2025035340A1 - Cell reselection method and apparatus, communication device and storage medium - Google Patents

Abstract

The present disclosure relates to the technical field of communications, and in particular, to a cell reselection method and apparatus, a communication device, and a storage medium. The cell reselection method comprises: performing cell reselection on the basis of priority information of a multicast service. According to the present disclosure, when performing cell reselection, a terminal can perform cell reselection on the basis of priority information of a multicast service, to facilitate reselection to a cell supporting a multicast service having relatively high priority, so as to meet the communication requirements of the terminal.

Description

Cell reselection method, device, communication equipment and storage medium Technical Field

The present disclosure relates to the field of communication technology, and in particular, to an XX method, a terminal, a network device, a communication device, and a storage medium.

Background Art

When a terminal communicates in a mobile network, it can perform cell reselection, for example, reselect from one cell to another cell so that the reselected cell can meet the communication needs of the terminal. However, there are some technical problems in the current cell reselection operation.

Summary of the invention

The embodiments of the present disclosure provide a cell reselection method, apparatus, communication device, and storage medium to solve technical problems in related technologies.

According to a first aspect of an embodiment of the present disclosure, a cell reselection method is proposed, which is executed by a terminal. The method includes: performing cell reselection according to priority information of a multicast service.

According to a second aspect of an embodiment of the present disclosure, a cell reselection method is proposed, which is executed by a network device. The method includes: sending priority information of a multicast service to a terminal, wherein the priority information of the multicast service is used by the terminal to perform cell reselection.

According to a third aspect of an embodiment of the present disclosure, a cell reselection device is proposed, which is arranged in a terminal, and the device includes: a processing module, which is used to perform cell reselection according to priority information of a multicast service.

According to the fourth aspect of an embodiment of the present disclosure, a cell reselection device is proposed, which is arranged in a network device, and the device includes: a transceiver module, which is used to send priority information of a multicast service to a terminal, wherein the priority information of the multicast service is used by the terminal to perform cell reselection.

According to the fifth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: one or more processors; a memory coupled to the one or more processors, wherein executable instructions are stored on the memory, and when the executable instructions are executed by the one or more processors, the terminal executes the cell reselection method described in the first aspect.

According to the sixth aspect of an embodiment of the present disclosure, a network device is proposed, comprising: one or more processors coupled to a memory of the one or more processors, the memory storing executable instructions, and when the executable instructions are executed by the one or more processors, the network device executes the cell reselection method described in the second aspect.

According to the seventh aspect of an embodiment of the present disclosure, a communication device is proposed, comprising: one or more processors; wherein the processor is used to call instructions so that the communication device executes the cell reselection method described in any one of the first aspect and the second aspect.

According to an eighth aspect of an embodiment of the present disclosure, a communication system is proposed, comprising a terminal and a network device, wherein the terminal is configured to implement the cell reselection method described in the first aspect, and the network device is configured to implement the cell reselection method described in the second aspect.

According to a ninth aspect of an embodiment of the present disclosure, a storage medium is proposed, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the cell reselection method described in any one of the first aspect and the second aspect.

According to the embodiments of the present disclosure, when a terminal performs cell reselection, the cell reselection can be performed according to the priority information of the multicast service. The priority information of the multicast service not only includes the cell reselection information such as the reselection priority, but also the reselection priority is associated with the multicast service, and the priority information of the multicast service can also include the priority of the multicast service. Accordingly, the terminal performs cell reselection according to the priority information of the multicast service, so as to facilitate reselection to a cell supporting a relatively high priority multicast service, so as to meet the communication needs of the terminal.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

FIG2 is an interactive schematic diagram showing a cell reselection method according to an embodiment of the present disclosure.

FIG3 is a schematic flow chart of a cell reselection method according to an embodiment of the present disclosure.

FIG4 is a schematic flowchart of a cell reselection method according to an embodiment of the present disclosure.

FIG5 is a schematic block diagram of a cell reselection device according to an embodiment of the present disclosure.

FIG6 is a schematic block diagram of a cell reselection device according to an embodiment of the present disclosure.

FIG. 7 is a schematic diagram of the structure of a communication device proposed in an embodiment of the present disclosure.

FIG. 8 is a schematic diagram of the structure of a chip proposed in an embodiment of the present disclosure.

DETAILED DESCRIPTION

Embodiments of the present disclosure provide a cell reselection method, apparatus, communication device, and storage medium.

In a first aspect, an embodiment of the present disclosure proposes a cell reselection method, which is executed by a terminal. The method includes: performing cell reselection according to priority information of a multicast service.

In the above embodiment, when the terminal performs cell reselection, the cell reselection can be performed according to the priority information of the multicast service. The priority information of the multicast service not only includes the cell reselection information such as the reselection priority, but also the reselection priority is associated with the multicast service, and the priority information of the multicast service can also include the priority of the multicast service. Accordingly, the terminal performs cell reselection according to the priority information of the multicast service, so as to facilitate reselection to a cell supporting a relatively high priority multicast service, so as to meet the communication needs of the terminal.

In combination with some embodiments of the first aspect, in some embodiments, the priority information of the multicast service is used by the terminal to preferentially reselect a cell supporting a high-priority multicast service.

In combination with some embodiments of the first aspect, in some embodiments, the priority information of the multicast service includes at least one of the following: the priority of the multicast service; and the reselection priority associated with the multicast service.

In combination with some embodiments of the first aspect, in some embodiments, the reselection priority associated with the multicast service is configured for each multicast service respectively, or the reselection priority associated with the multicast service is configured for all multicast services.

In combination with some embodiments of the first aspect, in some embodiments, the reselection priority includes at least one of the following: frequency priority; cell priority.

In combination with some embodiments of the first aspect, in some embodiments, the priority information of the multicast service is determined by at least one of the following: the terminal; or a network device.

In combination with some embodiments of the first aspect, in some embodiments, the method further comprises: indicating to the network device at least one of the following: information about a service being executed by the terminal; and information about a service of interest to the terminal.

In combination with some embodiments of the first aspect, in some embodiments, the service information includes at least one of the following: identification information of the service; and cell reselection information associated with the service.

In combination with some embodiments of the first aspect, in some embodiments, the information indicated to the network device is used to assist the network device in determining priority information of the multicast service.

In combination with some embodiments of the first aspect, in some embodiments, the network device includes at least one of the following: access network equipment; core network equipment; operation, maintenance and management equipment.

In combination with some embodiments of the first aspect, in some embodiments, the priority information of the multicast service is carried in at least one of the following: a broadcast message; a paging message; a proprietary signaling; or a non-access layer message.

In combination with some embodiments of the first aspect, in some embodiments, the priority information of the multicast service is carried in a non-access layer message, and the method further includes: sending the priority information of the multicast service to the access layer through the non-access layer.

In combination with some embodiments of the first aspect, in some embodiments, the multicast service includes at least one of the following: an activated multicast service; or an inactivated multicast service.

In combination with some embodiments of the first aspect, in some embodiments, the method further includes: determining multicast service information of a neighboring cell.

In combination with some embodiments of the first aspect. In some embodiments, when the terminal meets a first condition, the priority information of the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the priority information of the multicast service; a change in the session state of the multicast service.

In combination with some embodiments of the first aspect, in some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following: joining a session of a multicast service; supporting receiving a multicast service in a non-connected state; and supporting performing cell reselection according to priority information of the multicast service.

In combination with some embodiments of the first aspect, in some embodiments, the method further comprises: sending capability information to a network device, wherein the capability information is used to indicate whether the terminal supports performing cell reselection according to priority information of the multicast service.

In a second aspect, an embodiment of the present disclosure proposes a cell reselection method, which is executed by a network device, and the method includes: sending priority information of a multicast service to a terminal, wherein the priority information of the multicast service is used by the terminal to perform cell reselection.

In the above embodiment, when the network device performs cell reselection with the terminal, the priority information of the multicast service can be sent to the terminal. The priority information of the multicast service not only includes the cell reselection information such as the reselection priority, but also the reselection priority is associated with the multicast service, and the priority information of the multicast service can also include the priority of the multicast service. Accordingly, the terminal performs cell reselection according to the priority information of the multicast service, which is conducive to the terminal reselecting to a cell supporting a relatively high priority multicast service, so as to meet the communication needs of the terminal.

In combination with some embodiments of the second aspect, in some embodiments, the priority information of the multicast service is used by the network device to preferentially reselect a cell supporting a high-priority multicast service.

In combination with some embodiments of the second aspect, in some embodiments, the priority information of the multicast service includes at least one of the following: the priority of the multicast service; and the reselection priority associated with the multicast service.

In combination with some embodiments of the second aspect, in some embodiments, the reselection priority associated with the multicast service is configured for each multicast service respectively, or the reselection priority associated with the multicast service is configured for all multicast services.

In combination with some embodiments of the second aspect, in some embodiments, the reselection priority includes at least one of the following: frequency priority; cell priority.

In combination with some embodiments of the second aspect, in some embodiments, the priority information of the multicast service is determined by at least one of the following: the terminal; or a network device.

In combination with some embodiments of the second aspect, in some embodiments, the method further comprises: determining at least one of the following according to the terminal indication: information about a service being executed by the terminal; and information about a service of interest to the terminal.

In combination with some embodiments of the second aspect, in some embodiments, the service information includes at least one of the following: identification information of the service; and cell reselection information associated with the service.

In combination with some embodiments of the second aspect, in some embodiments, the information indicated by the terminal to the network device is used to assist the network device in determining priority information of the multicast service.

In combination with some embodiments of the second aspect, in some embodiments, the network device includes at least one of the following: access network equipment; core network equipment; operation, maintenance and management equipment.

In combination with some embodiments of the second aspect, in some embodiments, the priority information of the multicast service is carried in at least one of the following: a broadcast message; a paging message; a proprietary signaling; or a non-access layer message.

In combination with some embodiments of the second aspect, in some embodiments, the priority information of the multicast service is sent from the non-access layer to the access layer.

In combination with some embodiments of the second aspect, in some embodiments, the multicast service includes at least one of the following: an activated multicast service; or an inactivated multicast service.

In combination with some embodiments of the second aspect, in some embodiments, the method further includes: determining multicast service information of a neighboring cell.

In combination with some embodiments of the second aspect. In some embodiments, when the terminal meets a first condition, the priority information of the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the priority information of the multicast service; a change in the session state of the multicast service.

In combination with some embodiments of the second aspect, in some embodiments, the terminal satisfies the second condition, wherein the second condition includes at least one of the following: joining a session of a multicast service; supporting receiving a multicast service in a non-connected state; and supporting performing cell reselection according to priority information of the multicast service.

In combination with some embodiments of the second aspect, in some embodiments, the method further comprises: receiving capability information sent by the terminal, wherein the capability information is used to indicate whether the terminal supports performing cell reselection according to priority information of the multicast service.

In a third aspect, an embodiment of the present disclosure proposes a cell reselection device, which is arranged in a terminal, and the device includes: a processing module, which is used to perform cell reselection according to priority information of a multicast service.

In a fourth aspect, an embodiment of the present disclosure proposes a cell reselection device, which is arranged in a network device, and the device includes: a transceiver module, which is used to send priority information of a multicast service to a terminal, wherein the priority information of the multicast service is used by the terminal to perform cell reselection.

In a fifth aspect, an embodiment of the present disclosure provides a terminal, comprising: one or more processors; a memory coupled to the one or more processors, the memory storing executable instructions, the executable instructions being When the one or more processors are executed, the terminal executes the cell reselection method described in the first aspect and the optional embodiment of the first aspect.

In the sixth aspect, an embodiment of the present disclosure proposes a network device, comprising: one or more processors; a memory coupled to the one or more processors, the memory storing executable instructions, and when the executable instructions are executed by the one or more processors, the network device executes the cell reselection method described in the second aspect and the optional embodiment of the second aspect.

In the seventh aspect, an embodiment of the present disclosure proposes a communication device, which includes: one or more processors; one or more memories for storing instructions; wherein the processor is used to call the instructions so that the communication device executes the cell reselection method described in the first and second aspects, and the optional implementation methods of the first and second aspects.

In an eighth aspect, an embodiment of the present disclosure proposes a communication system, which includes: a terminal and a network device; wherein the terminal is configured to execute the method described in the first aspect and the optional embodiment of the first aspect, and the network device is configured to execute the method described in the second aspect and the optional embodiment of the second aspect.

In the ninth aspect, an embodiment of the present disclosure proposes a storage medium, which stores instructions. When the instructions are executed on a communication device, the communication device executes the method described in the first aspect, the second aspect, the optional embodiment of the first aspect, and the optional embodiment of the second aspect.

In the tenth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the first aspect, the second aspect, the optional embodiment of the first aspect, and the optional embodiment of the second aspect.

In the eleventh aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the first aspect, the second aspect, the optional embodiment of the first aspect, and the optional embodiment of the second aspect.

It is understandable that the above-mentioned terminal, network device, cell reselection device, communication device, communication system, storage medium, program product, and computer program are all used to execute the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method, which will not be repeated here.

The embodiments of the present disclosure provide a cell reselection method, apparatus, communication device, and storage medium. In some embodiments, the cell reselection method, information processing method, communication method, and other terms can be replaced with each other, the terminal, network device, cell reselection device, information processing device, communication device, and other terms can be replaced with each other, and the information processing system, communication system, and other terms can be replaced with each other.

The embodiments of the present disclosure are not exhaustive, but are only illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and/or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "one", "an", "the", "above", "said", "foregoing", "this", etc., may mean "one and only one", or may mean "one or more", "at least one", etc.

For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article can be understood as a singular expression or a plural expression.

In the embodiments of the present disclosure, “plurality” refers to two or more.

In some embodiments, the terms "at least one of", "one or more", "a plurality of", "multiple", etc. can be used interchangeably.

In some embodiments, "at least one of A and B", "A and/or B", "A in one case, B in another case", "in response to one case A, in response to another case B", etc., may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.

In some embodiments, the recording method of "A or B" may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). When there are more branches such as A, B, C, etc., the above is also similar.

The prefixes such as "first" and "second" in the embodiments of the present disclosure are only for distinguishing different description objects and do not constitute any restrictions on the position, order, priority, quantity or content of the description objects. For the statement of the description objects, please refer to the description in the context of the claims or embodiments, and no unnecessary restrictions should be constituted due to the use of prefixes.

For example, if the description object is "field", the ordinal number before "field" in "first field" and "second field" does not limit the position or order between "fields", "first" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of "first field" and "second field". For another example, if the description object is "level", the ordinal number before "level" in "first level" and "second level" does not limit the priority between "levels". For another example, the number of description objects is not limited by ordinal numbers and can be one or more. For example, "first device" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", "first device" and "second device" can be the same device or different devices, and their types can be the same or different. For another example, if the description object is "information", "first information" and "second information" can be the same information or different information, and their contents can be the same or different.

In some embodiments, “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

In some embodiments, terms such as "in response to ...", "in response to determining ...", "in the case of ...", "at the time of ...", "when ...", "if ...", "if ...", etc. can be used interchangeably.

In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

In some embodiments, devices and the like can be interpreted as physical or virtual, and their names are not limited to those in the embodiments.

The recorded names, terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

In some embodiments, "network" may be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

In some embodiments, the terms "access network device (AN device), "radio access network device (RAN device)", "base station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", "node", "access point (access point)", "transmission point (TP)", "reception point (RP)", "transmission/reception point (TRP)", "panel", "antenna panel (antenna panel)", "antenna array (antenna array)", "cell", "macro cell", "small cell (small cell)", "femto cell (femto cell)", "pico cell (pico cell)", "sector (sector)", "cell group (cell)", "serving cell", "carrier (carrier)", "component carrier (component carrier)", "bandwidth part (bandwidth part (BWP))" and so on can be used interchangeably.

In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal" "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client and the like can be used interchangeably.

In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the access network device, the core network device, or the network device and the communication between the terminals is replaced by the communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may also be configured to have a structure that has all or part of the functions of the terminal.

In some embodiments, acquisition of data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

In some embodiments, data, information, etc. may be obtained with the user's consent.

In addition, each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns may also be implemented as an independent embodiment.

FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

As shown in FIG1 , a communication system 100 includes a terminal 101 and a network device 102 , wherein the network device includes at least one of the following: an access network device and a core network device.

In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited to these.

In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved Node B (eNB), a next generation evolved Node B (ng-eNB), a next generation Node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

In some embodiments, the core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of the Evolved Packet Core (EPC), the 5G Core Network (5GCN), and the Next Generation Core (NGC).

In some embodiments, the technical solution of the present disclosure may be applicable to the Open RAN architecture. In this case, the interfaces between access network devices or within access network devices involved in the embodiments of the present disclosure may become internal interfaces of Open RAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.

In some embodiments, the access network device may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be called a control unit (control unit). The CU-DU structure may be used to split the protocol layer of the access network device, with some functions of the protocol layer being centrally controlled by the CU, and the remaining part or all of the functions of the protocol layer being distributed in the DU, and the DU being centrally controlled by the CU, but not limited to this.

It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. A person of ordinary skill in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or part of the subject, but are not limited thereto. The subjects shown in FIG1 are examples, and the communication system may include all or part of the subjects in FIG1 , or may include other subjects other than FIG1 , and the number and form of the subjects are arbitrary, and the subjects may be physical or virtual, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be in any manner, and may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection.

The embodiments of the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, the fourth generation mobile communication system (4G), the fifth generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (New-Radio Access Technology, RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark)), Public Land Mobile Network (PLMN) network, Device-to-Device (D2D) system, Machine to Machine (M2M) system, Internet of Things (IoT) system, Vehicle-to-Everything (V2X), systems using other communication methods, and next-generation systems expanded based on them, etc. In addition, multiple systems can also be combined (for example, a combination of LTE or LTE-A and 5G, etc.) for application.

FIG2 is an interactive schematic diagram showing a cell reselection method according to an embodiment of the present disclosure.

As shown in FIG2 , the cell reselection method includes the following steps:

Step S201: The network device sends first information to the terminal.

In some embodiments, the terminal receives first information.

In some embodiments, the first information includes priority information of the multicast service.

In some embodiments, priority information of the multicast service is used by the terminal for cell reselection.

In some embodiments, the priority information of the multicast service is used by the terminal to preferentially reselect to a cell supporting a high-priority multicast service.

In some embodiments, the priority information of the multicast service includes at least one of the following: the priority of the multicast service; and the reselection priority associated with the multicast service.

In some embodiments, the reselection priority associated with the multicast service is configured separately for each multicast service.

In some embodiments, the reselection priority associated with the multicast service is configured for all multicast services.

In some embodiments, the reselection priority includes at least one of the following: frequency priority; cell priority.

In some embodiments, the priority information of the multicast service is determined by at least one of: the terminal; a network device.

In some embodiments, the priority information of the multicast service is carried in at least one of the following: a broadcast message; a paging message; a proprietary signaling; a non-access layer message.

In some embodiments, the multicast service includes at least one of the following: an activated multicast service; an inactivated multicast service.

In some embodiments, the network device determines multicast service information of a neighboring cell.

In some embodiments, when the terminal satisfies a first condition, the priority information of the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the priority information of the multicast service; a change in the session state of the multicast service.

In some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following: joining a session of a multicast service; supporting reception of a multicast service in a non-connected state; and supporting cell reselection based on priority information of the multicast service.

Step S202: The terminal reselects a cell according to the first information.

In some embodiments, the first information includes priority information of the multicast service.

In some embodiments, the terminal indicates to the network device at least one of the following: information about a service being executed by the terminal; and information about a service in which the terminal is interested.

In some embodiments, the service information includes at least one of the following: identification information of the service; and cell reselection information associated with the service.

In some embodiments, the information indicated by the terminal to the network device is used to assist the network device in determining the priority information of the multicast service.

In some embodiments, the network equipment includes at least one of the following: access network equipment; core network equipment; operation, maintenance and management equipment.

In some embodiments, the terminal sends the priority information of the multicast service to the access layer via the non-access layer. In some embodiments, the terminal determines the multicast service information of the neighboring cell.

In some embodiments, the terminal sends capability information to the network device.

In some embodiments, the capability information is used to indicate whether the terminal supports performing cell reselection according to priority information of the multicast service.

The communication method involved in the embodiment of the present disclosure may include at least one of step S201 to step S202. For example, step S201 may be implemented as an independent embodiment, step S202 may be implemented as an independent embodiment, and step S201+S202 may be implemented as an independent embodiment, but is not limited thereto.

In some embodiments, steps S201 and S202 may be executed in an exchanged order or simultaneously. Steps S201 and S202 may be executed in an exchanged order or simultaneously.

In some embodiments, step S201 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, step S202 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

In some embodiments, reference may be made to other optional implementations recorded before or after the description corresponding to FIG. 2 .

In some embodiments, the terminal may perform multicast service communication. In some embodiments, the multicast service may be marked by a multicast service identifier, for example, the multicast service identifier includes at least one of the following: a temporary mobile group identifier (TMGI), a multicast broadcast service session (MBS (Multicast Broadcast Service) Session) identifier, and a multicast broadcast service quality of service (MBS QoS (Quality of Service) flow) identifier.

In some embodiments, the sending mode of the multicast service may include at least one of the following: sending in a multicast mode and sending in a broadcast mode.

For example, when a multicast service is sent via multicast, the terminal may be in a connected state, and the network device may send a multicast service reception configuration to the terminal via terminal-specific signaling, and the terminal may receive the multicast service according to the multicast service reception configuration.

For example, when a multicast service is sent via broadcast, the terminal may be in a non-connected state, and the network device may send a broadcast signaling carrying a multicast service reception configuration to the terminal, and the terminal may receive the multicast service according to the multicast service reception configuration.

It should be noted that the connection state and the non-connection state refer to the radio resource control (Radio Resource In some embodiments, the non-connected state includes at least one of the following: an idle state and an inactive state.

In some embodiments, the broadcast signaling includes at least one of the following:

System information (SI), such as a system information block (SIB), which may be, for example, an existing SIB21, or a newly defined system information block;

MBS Control Channel (MCCH) message. For example, MBS Control Channel message for multicast service.

In some embodiments, the dedicated signaling includes RRC signaling, such as radio resource control release (RRCRelease) signaling with suspension configuration or RRCRelease signaling without suspension configuration or RRC reconfiguration (RRCReconfiguration) signaling.

In some embodiments, a terminal may be interested in multiple multicast services, for example, it may desire to perform multiple multicast services. In this case, when reselecting a cell, the reselected cell may not support the services that the terminal is interested in, which may easily affect the communication effect of the terminal.

In a first aspect, an embodiment of the present disclosure proposes a cell reselection method. Figure 3 is a schematic flow chart of a cell reselection method according to an embodiment of the present disclosure. The cell reselection method shown in this embodiment can be executed by a terminal.

As shown in FIG3 , the cell reselection method may include the following steps:

In step S301, cell reselection is performed according to priority information of the multicast service.

It should be noted that the embodiment shown in FIG. 3 may be implemented independently or in combination with at least one other embodiment in the present disclosure. The specific implementation may be selected as needed and the present disclosure is not limited thereto.

In some embodiments, the priority information of the multicast service includes at least one of the following: priority of the multicast service; reselection priority associated with the multicast service. Further, in some embodiments, the reselection priority includes at least one of the following: frequency priority; cell priority.

It should be noted that the frequency point may refer to frequency domain information, for example, may include Absolute Radio Frequency Channel Number (ARFCN).

In this embodiment, when the terminal performs cell reselection, the cell reselection can be performed according to the priority information of the multicast service. The priority information of the multicast service not only includes the cell reselection information such as the reselection priority, but also the reselection priority is associated with the multicast service, and the priority information of the multicast service can also include the priority of the multicast service. Accordingly, the terminal performs cell reselection according to the priority information of the multicast service, so as to facilitate reselection to a cell supporting a relatively high priority multicast service, so as to meet the communication needs of the terminal.

In some embodiments, at least one frequency point in the frequency point priority associated with the first multicast service can support the first multicast service. For example, each frequency point in the frequency point priority associated with the first multicast service supports the first multicast service.

In some embodiments, at least one cell in the cell priority associated with the first multicast service may support the first multicast service. For example, each cell in the cell priority associated with the first multicast service supports the first multicast service.

In some embodiments, the priority information of the multicast service is used by the terminal to preferentially reselect a cell supporting a high-priority multicast service.

For example, a multicast service with a higher priority can be considered as a task that the terminal needs more. Therefore, the terminal preferentially reselects to a cell that supports a high-priority multicast service based on the priority information of the multicast service. This helps to ensure that after reselecting the cell, relatively high-priority services can be performed in the cell to meet the needs of the terminal.

In some embodiments, the priority reselection to the cell supporting the high priority multicast service may include the following two methods: One of the ways:

Method 1: performing cell reselection only according to the reselection priority associated with one or more multicast services with a high priority, for example, performing cell reselection only according to the retransmission priority associated with the multicast service with the highest priority;

Method 2: According to the priority of multicast services from high to low, cell reselection is performed according to the retransmission priority associated with multicast.

As to whether the terminal performs cell reselection based on method 1 or cell retransmission based on method 2, it can be determined by the terminal autonomously, or can be determined according to the configuration of the network device, or can be determined based on the protocol agreement.

Take two multicast services TMGI#1 and TMGI#2, where the priority information of the multicast services includes the priority of the multicast services as an example. According to the priority information of the multicast services, the terminal can determine that the priorities of the two multicast services are TMGI#2 and TMGI#1 from high to low.

For example, according to the above-mentioned method 1, the terminal performs cell reselection according to the priority information of the multicast service, and can only determine whether there is a cell that meets the cell reselection condition among the cells supporting the highest priority multicast service TMGI#2. When there is a cell that meets the cell reselection condition, the terminal can reselect to the cell without having to determine whether there is a cell that meets the cell reselection condition among the cells supporting TMGI#1.

For example, according to the above-mentioned method 2, the terminal performs cell reselection according to the priority information of the multicast service, and can only support whether there is a cell that meets the cell reselection condition among the cells supporting TMGI#2. When there is a cell that meets the cell reselection condition, the terminal can reselect to the cell. When there is a cell that meets the cell reselection condition among the cells supporting TMGI#2, it is determined whether there is a cell that meets the cell reselection condition among the cells supporting TMGI#1. When there is a cell that meets the cell reselection condition, the terminal can reselect to the cell. When there is a cell that meets the cell reselection condition among the cells supporting TMGI#1, the terminal can perform cell reselection based on the rules of legacy cell reselection, which will not be described in detail in this disclosure.

It should be noted that the cell reselection condition may include at least one of the following: S criterion, R criterion, and may also include other conditions, which are not limited in the present disclosure.

Furthermore, the method of preferentially reselecting to a cell supporting a high-priority multicast service is not limited to the above two methods. For example, in addition to considering the reselection priority associated with the multicast service in the above two methods, the reselection priority not associated with the multicast service may also be considered for cell reselection. For example, the terminal first reselects according to the reselection priority associated with one or more high-priority multicast services, and then reselects the cell according to the reselection priority not associated with the multicast service.

Among them, the reselection priority not associated with the multicast service includes at least one of the following: a reselection priority not associated with a specific multicast service (for example, a service being executed by the terminal, for example, a multicast service in which the terminal is interested); a reselection priority not associated with any multicast service, such as a traditional reselection priority.

In some embodiments, the reselection priority associated with the multicast service is configured for each multicast service respectively, or the reselection priority associated with the multicast service is configured for all multicast services.

Taking two multicast services TMGI#1 and TMGI#2, where the reselection priority includes the frequency priority, as an example, two configuration methods of the reselection priority associated with the multicast services are exemplified.

For example, the reselection priority associated with a multicast service is configured for each multicast service.

In some embodiments, the terminal may determine a final reselection priority (eg, called a multicast service-based reselection priority) according to the priority of the multicast service and a reselection priority configured for each multicast service (also referred to as an associated reselection priority).

In some embodiments, the reselection priority of a service association with a relatively higher priority is higher than the reselection priority of a service association with a relatively lower priority.

In some embodiments, when the reselection priority of a service association with a relatively high priority is higher than that of a service association with a relatively low priority When the reselection priorities of the service associations with relatively higher priorities conflict, the cell reselection can be performed based on the reselection priorities of the service associations with relatively higher priorities. When the reselection priorities of the service associations with relatively higher priorities do not conflict with the reselection priorities of the service associations with relatively lower priorities, the cell reselection can be performed based on the reselection priorities of each service association in descending order of the priority of the multicast service.

For example, the frequency priority configured for TMGI#2 is f1＞f2 (the priority of frequency f1 is higher than the priority of frequency f2), and the frequency priority configured for TMGI#1 is f2＞f1. Although the frequency priority associated with TMGI#2 conflicts with the frequency priority associated with TMGI#1, the priority of TMGI#2 is higher than the priority of TMGI#1, so the cell reselection is performed based on the frequency priority associated with TMGI#2, that is, the cell reselection is performed according to the frequency priority f1＞f2. Based on this, the terminal can first determine whether there is a cell that meets the cell reselection condition among the cells corresponding to frequency f1. If there is a cell that meets the cell reselection condition, the terminal can reselect to the cell. If there is no cell that meets the cell reselection condition among the cells corresponding to f1, the terminal can then determine whether there is a cell that meets the cell reselection condition among the cells corresponding to frequency f2.

For example, the frequency priority configured for TMGI#2 is f1>f2, and the frequency priority configured for TMGI#1 is f2>f3. The priority of TMGI#2 is higher than that of TMGI#1. The frequency priorities associated with TMGI#2 and TMGI#1 do not conflict. The terminal performs cell reselection based on the reselection priorities associated with TMGI#2 and TMGI#1 from high to low. When determining the final reselection priority, the terminal gives priority to f1>f2, and then considers f2>f3. Based on this, the terminal first determines whether there is a cell that meets the cell reselection condition among the cells corresponding to the frequency point f1. If there is a cell that meets the cell reselection condition, the terminal can reselect to the cell. If there is no cell that meets the cell reselection condition among the cells corresponding to f1, the terminal determines whether there is a cell that meets the cell reselection condition among the cells corresponding to the frequency point f2.

When there is no cell meeting the cell reselection condition among the cells corresponding to f2, the terminal performs cell reselection according to the reselection priority f2>f3 associated with TMGI#1. Since f2 has been considered, it is only necessary to determine whether there is a cell meeting the cell reselection condition among the cells corresponding to frequency point f3.

For example, the reselection priority associated with a multicast service is configured for all multicast services.

For example, if the frequency priority configured for TMGI#1 and TMGI#2 is f1>f2, the terminal can perform cell reselection according to the frequency priority f1>f2. For example, first determine whether there is a cell that meets the cell reselection condition among the cells corresponding to frequency f1. If there is a cell that meets the cell reselection condition, the terminal can reselect the cell. If there is no cell that meets the cell reselection condition among the cells corresponding to f1, then determine whether there is a cell that meets the cell reselection condition among the cells corresponding to frequency f2.

In some embodiments, the priority information of the multicast service is determined by at least one of: the terminal; a network device.

In some embodiments, the network device may determine the priority information of the multicast service, and then indicate the priority information of the multicast service to the terminal, and the terminal may reselect a cell according to the received priority information of the multicast service.

For example, the network device can determine the reselection priority of each multicast service respectively, and then indicate the reselection priority of each multicast service to the terminal. The terminal can reselect the cell according to the reselection priority associated with each service according to the priority of the multicast service from high to low.

For example, the network device may determine a reselection priority based on the multicast service according to the multicast service priority, and then send the reselection priority based on the multicast service to the terminal, and the terminal may reselect a cell according to the reselection priority based on the multicast service.

In some embodiments, the reselection priority based on the multicast service can be regarded as the reselection priority configured for all multicast services. The reselection priority based on the multicast service determined according to the priority of the multicast service can satisfy at least one of the following conditions because the priority of the multicast service is taken into consideration: the priority of the frequency point supporting the multicast service with a relatively high priority is relatively high, and the priority of the frequency point supporting the multicast service with a relatively low priority is relatively low.

In some embodiments, the terminal may autonomously determine priority information of the multicast service.

For example, the network device may determine the reselection priority of each multicast service respectively for each multicast service, and then indicate the reselection priority of each multicast service to the terminal, and the priority of the multicast service may be determined by the terminal. Then, the terminal may reselect a cell according to the priority of the multicast service determined by the terminal and the reselection priority of each multicast service.

For example, the network device may send the reselection priority based on the multicast service to the terminal, and the terminal may adjust the reselection priority based on the multicast service according to the priority of the multicast service, and then reselect the cell according to the adjusted reselection priority based on the multicast service.

For example, the network device can send the reselection priority based on the multicast service to the terminal. The terminal can adjust the reselection priority based on the multicast service according to its own capabilities (such as the ability to receive multicast services at a specific frequency), and then reselect the cell according to the adjusted reselection priority based on the multicast service.

Among them, the reselection priority based on multicast service adjusted according to the priority of multicast service can meet at least one of the following requirements because the priority of multicast service is taken into consideration: the priority of frequency points supporting multicast services with relatively higher priorities is relatively high, and the priority of frequency points supporting multicast services with relatively lower priorities is relatively low.

For example, the reselection priority based on the multicast service sent by the network device to the terminal includes f1>f2, where f1 supports TMGI#1 but does not support TMGI#2, while f2 supports TMGI#2. The terminal determines that the priority of TMGI#2 is higher than the priority of TMGI#1 according to the priority of the multicast service. Then, in order to ensure that the cell supporting TMGI#2 is reselected first, the terminal can adjust the reselection priority based on the multicast service to f2>f1, so that it can first determine whether there is a cell that meets the cell reselection condition in the cell corresponding to the frequency point f2. When there is a cell that meets the cell reselection condition, it can reselect to the cell. When there is no cell that meets the cell reselection condition in the cell corresponding to f2, it is then determined whether there is a cell that meets the cell reselection condition in the cell corresponding to the frequency point f1. Accordingly, it is beneficial to preferentially reselect to the cell corresponding to the frequency point supporting TMGI#2 (the cell also supports TMGI#2) so as to meet the communication needs of the terminal.

In some embodiments, priority information of the multicast service may be determined by the network device and the terminal.

For example, the network device can send the priority of the multicast service and the reselection priority corresponding to each multicast service to the terminal, and the terminal can independently determine the priority of the multicast service, and then adjust the priority of the multicast service sent by the network device according to the autonomously determined priority of the multicast service, and then reselect the cell according to the adjusted priority of the multicast service and the reselection priority corresponding to each multicast service.

For example, the network device can send the reselection priority based on the multicast service to the terminal, and the terminal can independently determine the priority of the multicast service, and then adjust the received reselection priority based on the multicast service according to the autonomously determined multicast service priority, and then reselect the cell according to the adjusted reselection priority based on the multicast service.

In some embodiments, the cell reselection method further includes: indicating to the network device at least one of the following:

Information about the service being executed by the terminal;

Information about services of interest to the terminal.

Of course, the content indicated by the terminal to the network device is not limited to the above two types of information, and other content may also be indicated, such as the priority information of the multicast service when the terminal receives the multicast service, that is, the priority information of the multicast service being used when the terminal receives the multicast service.

In some embodiments, the terminal may indicate to the network device information about the service being executed by the terminal, or information about the service the terminal is interested in. Thus, the network device may learn information about the service being executed by the terminal (also called activated service) and information about the service the terminal is interested in.

The indication may be made in an explicit manner or in an implicit manner, and the present disclosure does not limit this. For example, when the priority information indicating the multicast service includes the priority of the multicast service, the terminal may The priority relationship between multicast services is explicitly indicated to the network device, or the terminal can indicate the information of the multicast services to the terminal in order, and the priority relationship between the multicast services is implicitly indicated through the order, for example, the priority of the multicast services at the front in the order is higher.

It should be noted that the network device indicates the priority information of the multicast service to the terminal, and the terminal can also indicate the priority information of the multicast service to the network device. Any implementation method of indicating priority in the present disclosure includes but is not limited to at least one of the following: explicit indication and implicit indication.

In some embodiments, the information indicated to the network device is used to assist the network device in determining priority information of the multicast service.

For example, when determining the priority of a multicast service, the network device and/or the terminal may set the priority of the service being executed by the terminal to be relatively high, for example, higher than the priority of the service not being executed by the terminal. This helps to ensure that when the terminal reselects a cell based on the priority of the multicast service, it can preferentially reselect a cell that supports the service being executed by the terminal, so that the terminal can continue to execute the service being executed in the reselected cell, which helps to ensure service continuity.

For example, when determining the priority of a multicast service, the network device and/or the terminal may set the priority of the service of interest to the terminal to be relatively high, for example, higher than the priority of the service in which the terminal is not interested. This helps to ensure that when the terminal reselects a cell based on the priority of the multicast service, it can preferentially reselect a cell that supports the service of interest to the terminal, so that the terminal can perform the service of interest in the reselected cell, which helps to meet the needs of the terminal.

It should be noted that, for the network device, the first indication information is only used to assist the network device in determining the priority information of the multicast service, but cannot determine the network device to determine the priority information of the multicast service, that is, the network device may not determine the priority information of the multicast service based on the content indicated by the first indication information.

In some embodiments, the service information includes at least one of the following:

Service identification information, such as at least one of the following: TMGI, MBS Session ID, MBS QoS flow ID;

Service-related cell reselection information.

In some embodiments, the service-associated cell reselection information includes at least one of the following: service-associated frequency information; service-associated frequency priority information.

In some embodiments, the frequency information associated with the multicast service may include information about the frequency supporting the multicast service, and the cell corresponding to the frequency supporting the multicast service may also support the multicast service. For example, the frequency information associated with the multicast service TMGI#1 is f1, f1 may support the inactive multicast service TMGI#1, and the cell corresponding to f1 supports the inactive multicast service TMGI#1.

In some embodiments, the frequency in the frequency priority information associated with the multicast service may include a frequency that supports the multicast service, and the cell corresponding to the frequency that supports the multicast service may also support the multicast service. For example, the frequency priority information associated with the multicast service associated with the multicast service TMGI#1 is f1>f2 (that is, the priority of frequency f1 is higher than the priority of frequency f2), f1 and f2 may support the inactive multicast service TMGI#1, the cell corresponding to f1 supports the inactive multicast service TMGI#1, and the cell corresponding to f2 supports the inactive multicast service TMGI#1.

In some embodiments, when determining the priority of a multicast service, the network device and/or the terminal may set the priority of the cell reselection information associated with the service being performed by the terminal to be relatively high, for example, setting the priority higher than the cell reselection information associated with the service not being performed by the terminal. Accordingly, it is beneficial to ensure that when the terminal performs cell reselection based on the cell reselection information associated with the multicast service, it can preferentially reselect the cell that supports the service being performed by the terminal, so that the terminal can continue to perform the service being performed in the reselected cell, which is beneficial to ensure service continuity.

For example, the network device determines, according to the first indication information, that the frequency point supporting the terminal to execute service TMGI#2 is f2, and frequency f1 does not support the terminal executing service TMGI#2. The network device can determine that the reselection priority based on the multicast service is f2>f1, and then indicate the reselection priority based on the multicast service to the terminal. The terminal reselects the cell based on this, so as to preferentially reselect to the cell that supports the terminal executing service TMGI#2.

For example, the network device determines, based on the first indication information, that the cell reselection information associated with the terminal executing service TMGI#2 is f2>f1, and the cell reselection information associated with the terminal not executing service TMGI#1 is f1>f2, wherein f2>f1 has a higher priority than f1>f2, and the reselection priority based on the multicast service can be determined preferentially based on the cell reselection information with a relatively high priority, for example, the reselection priority based on the multicast service is determined to be f2>f1, and then the reselection priority based on the multicast service can be indicated to the terminal. The terminal performs cell reselection based on this, so as to preferentially reselect to the cell that supports the service TMGI#2 that the terminal is executing.

In some embodiments, when determining the priority of a multicast service, the network device and/or the terminal may set the priority of the cell reselection information associated with the service of interest to the terminal to be relatively high, for example, setting the priority higher than the cell reselection information associated with the service of no interest to the terminal. Accordingly, it is beneficial to ensure that when the terminal performs cell reselection based on the cell reselection information associated with the multicast service, it can preferentially reselect the cell that supports the service of interest to the terminal, so that the terminal can perform the service of interest in the reselected cell, which is beneficial to meeting the needs of the terminal.

For example, the network device determines that the frequency point supporting the terminal's service of interest TMGI#2 is f2 according to the first indication information, and the frequency point f1 does not support the terminal's service of interest TMGI#2. The network device can determine that the reselection priority based on the multicast service is f2>f1, and then the reselection priority based on the multicast service can be indicated to the terminal. The terminal performs cell reselection based on this, so as to preferentially reselect to the cell supporting the terminal's service of interest TMGI#2.

For example, the network device determines, based on the first indication information, that the cell reselection information associated with the terminal's service of interest TMGI#2 is f2>f1, and the cell reselection information associated with the terminal's service TMGI#1 that is not executed is f1>f2, where f2>f1 has a higher priority than f1>f2, and can preferentially determine the reselection priority based on the multicast service based on the cell reselection information with a relatively high priority, for example, determining that the reselection priority based on the multicast service is f2>f1, and then indicating the reselection priority based on the multicast service to the terminal. The terminal performs cell reselection based on this, so as to preferentially reselect to the cell that supports the service of interest TMGI#2 of the terminal.

In some embodiments, the network equipment includes at least one of the following: access network equipment (such as a base station); core network equipment (also referred to as core network functions); operation and maintenance management (Operation Administration and Maintenance, OAM) equipment.

In some embodiments, the priority information of the multicast service is carried in at least one of the following: a broadcast message; a paging message; a proprietary signaling; a non-access stratum (NAS) message.

For example, the broadcast signaling includes at least one of the following: SIBx, MCCH message; for example, the dedicated signaling includes RRC signaling, for example, the RRC signaling includes RRC Release signaling.

For example, the network device includes an access network device, and the access network device may carry priority information of the multicast service and send it to the terminal via proprietary signaling and/or broadcast signaling.

For example, the network device includes a core network device, and the access network device may carry the priority information of the multicast service via a non-access layer message and send it to the terminal.

In some embodiments, the priority information of the multicast service is carried in a non-access layer message, and the method further includes: sending the priority information of the multicast service to an access layer (Access Stratum, AS) through the non-access layer. Since the operations in the cell reselection process are mainly implemented by the access layer, the non-access layer sends the priority information of the multicast service to the access layer, so that the access layer can perform cell reselection according to the priority information of the multicast service.

In some embodiments, the multicast service includes at least one of the following:

Activated multicast services;

Inactive multicast service.

For example, the priority information of the multicast service may include the priority information of the activated multicast service, may include the priority information of the inactivated multicast service, or may include the priority information of the activated multicast service and the priority information of the inactivated multicast service. In some embodiments, the activated multicast service may include the multicast service that allows the service reception to be performed in a non-connected state; in some embodiments, the inactivated multicast service may include the multicast service that allows the service reception to be performed in a non-connected state.

It should be noted that the multicast service is not activated, which means that the multicast service is in a state other than the activated state. For example, the state other than the activated state includes at least one of the following: deactivation, release, and suspension.

In some embodiments, the method further includes: determining multicast service information of a neighboring cell.

For example, the terminal may determine the multicast service information of the neighboring cell by receiving the neighboring cell list in the MCCH message. The neighboring cell list includes cells that provide the same service as the current serving cell.

For example, the network device may indicate the neighboring cell and the multicast service supported by the neighboring cell through at least one of the following: dedicated signaling, broadcast message, or paging message. The multicast service supported by the neighboring cell may be the same as or different from the multicast service provided by the current serving cell, which is not limited in this embodiment.

In some embodiments, when the terminal performs cell reselection, the candidate cells may include the current serving cell and the neighboring cells. The terminal may determine whether the candidate cell supports the multicast service based on the multicast service information of the neighboring cells, wherein the multicast service may be, for example, the multicast service being executed by the terminal or the multicast service of interest to the terminal. If the candidate cell supports the multicast service, the candidate cell may be reselected; if the candidate cell does not support the multicast service, it may be determined whether other cells at the same frequency point support the multicast service, or it may be determined whether the cell at the frequency point of the next priority point supports the multicast service.

It should be noted that the candidate cells that have not been reselected and the frequencies where the candidate cells are located may not be allowed to be reselected within the first time period. This is helpful to avoid considering cells and frequencies that do not meet the conditions during the cell reselection process, and is helpful to improve the efficiency of cell reselection.

In some embodiments, when a terminal performs cell reselection, it may first determine a candidate cell that supports a multicast service, and then select a cell from the candidate cells, where the multicast service may be, for example, a multicast service that the terminal is executing or a multicast service that the terminal is interested in. Then, the cell with the best signal quality is determined among the candidate cells, and it is determined whether the cell is a suitable cell. If it is not a suitable cell, it is determined whether other cells at the same frequency point are suitable cells, or it may be determined whether a cell at a frequency point with the next priority level is a suitable cell. For the method of determining a suitable cell, reference may be made to the relevant technology, and this disclosure will not be repeated here.

In some embodiments, when the terminal satisfies a first condition, the priority information of the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the priority information of the multicast service; a change in the session state of the multicast service.

In some embodiments, when the first time expires, the terminal may determine that the priority information of the multicast service is invalid.

For example, the first time may be agreed upon by a protocol, or the first time may be sent by a network device to a terminal (for example, carried by broadcast signaling or proprietary signaling), or the first time may be limited by a timer, for example, when the timer times out, the terminal may determine that the priority information of the multicast service is invalid. For example, the broadcast signaling includes at least one of the following: SIBx, MCCH message; for example, the proprietary signaling includes RRC signaling, for example, the RRC signaling includes RRCRelease signaling.

In some embodiments, the network device fails to send priority information of the multicast service to the terminal through the dedicated signaling, and the timer can be a newly introduced timer, or the timer T320 can be reused. It should be noted that the duration of the timer can be set to a finite value or to infinity.

In some embodiments, the priority information of the multicast service is changed, and the terminal may determine that the priority information of the multicast service is invalid.

For example, the priority information of the multicast service includes at least one of the following three information: identification information of the multicast service; frequency information associated with the multicast service; and frequency priority information associated with the multicast service. When any of the three information changes, the terminal can determine that the priority information of the multicast service is invalid.

In some embodiments, the terminal may determine that the priority information of the multicast service is invalid when the session state of the multicast service changes. For example, the terminal may determine that the priority information of the multicast service is invalid when the session of the multicast service is released; for example, the terminal may determine that the priority information of the multicast service is invalid when the session of the multicast service is deactivated.

In some embodiments, when the priority information of the multicast service becomes invalid, the network device may resend the priority information of the multicast service to the terminal via proprietary signaling, or the terminal may receive broadcast signaling and obtain the priority information of the multicast service from the broadcast signaling, or the terminal may reselect a cell based on traditional cell reselection information.

In some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following:

A session that has joined the multicast service;

Support receiving multicast services in a non-connected state;

Supports cell reselection based on multicast service priority information.

In some embodiments, the cell reselection method further includes: sending capability information to a network device, wherein the capability information is used to indicate whether the terminal supports performing cell reselection according to priority information of a multicast service.

The terminal may send capability information to the network device, and through the capability information, the terminal may indicate to the network device whether the terminal supports cell reselection based on the priority information of the multicast service. For example, if the network device determines based on the capability information that the terminal supports cell reselection based on the priority information of the multicast service, the priority information of the multicast service may be sent to the terminal; if the network device determines based on the capability information that the terminal does not support cell reselection based on the priority information of the multicast service, the priority information of the multicast service may not be sent to the terminal to avoid wasting communication resources.

In a second aspect, an embodiment of the present disclosure proposes a cell reselection method. Figure 4 is a schematic flow chart of a cell reselection method according to an embodiment of the present disclosure. The cell reselection method shown in this embodiment can be executed by a network device.

As shown in FIG4 , the cell reselection method may include the following steps:

In step S401, priority information of a multicast service is sent to a terminal, wherein the priority information of the multicast service is used by the terminal to perform cell reselection.

It should be noted that the embodiment shown in FIG. 4 can be implemented independently or in combination with at least one other embodiment in the present disclosure. The specific selection can be made as needed, and the present disclosure is not limited thereto.

In some embodiments, the priority information of the multicast service includes at least one of the following: priority of the multicast service; reselection priority associated with the multicast service. Further, in some embodiments, the reselection priority includes at least one of the following: frequency priority; cell priority.

It should be noted that the frequency point may refer to frequency domain information, for example, may include an absolute radio frequency channel number (ARFCN).

In this embodiment, the network device can send the priority information of the multicast service to the terminal for cell reselection. The priority information of the multicast service includes not only the cell reselection information such as the reselection priority, but also the Priority is associated with multicast services, and the priority information of multicast services may also include the priority of multicast services. Accordingly, the terminal performs cell reselection according to the priority information of multicast services, which is conducive to the terminal reselecting to a cell supporting multicast services with relatively higher priority, so as to meet the communication needs of the terminal.

In some embodiments, at least one frequency point in the frequency point priority associated with the first multicast service can support the first multicast service. For example, each frequency point in the frequency point priority associated with the first multicast service supports the first multicast service.

In some embodiments, at least one cell in the cell priority associated with the first multicast service may support the first multicast service. For example, each cell in the cell priority associated with the first multicast service supports the first multicast service.

In some embodiments, the priority information of the multicast service is used by the network device to preferentially reselect a cell that supports a high-priority multicast service.

For example, a multicast service with a higher priority can be considered as a task that the terminal needs more. Therefore, the network device preferentially reselects to a cell that supports a high-priority multicast service based on the priority information of the multicast service. This helps to ensure that after reselecting the cell, relatively high-priority services can be performed with the terminal in the cell to meet the needs of the terminal.

In some embodiments, preferentially reselecting to a cell supporting a high-priority multicast service may include one of the following two methods:

Method 1: performing cell reselection only according to the reselection priority associated with one or more multicast services with a high priority, for example, performing cell reselection only according to the retransmission priority associated with the multicast service with the highest priority;

Method 2: According to the priority of multicast services from high to low, cell reselection is performed according to the retransmission priority associated with multicast.

As for whether the network device performs cell reselection based on method one or cell retransmission based on method two, it can be determined autonomously by the network device, or it can be determined according to terminal requirements, or it can be determined based on protocol agreements.

Take two multicast services TMGI#1 and TMGI#2, where the priority information of the multicast services includes the priority of the multicast services as an example. The network device can determine that the priorities of the two multicast services are TMGI#2 and TMGI#1 from high to low according to the priority information of the multicast services.

For example, according to the first method described above, the terminal performs cell reselection based on the priority information of the multicast service, and can only determine whether there is a cell that meets the cell reselection condition among the cells that support the highest priority multicast service TMGI#2. When there is a cell that meets the cell reselection condition, the terminal can reselect to the cell without having to determine whether there is a cell that meets the cell reselection condition among the cells that support TMGI#1.

For example, according to the above-mentioned method 2, the terminal performs cell reselection according to the priority information of the multicast service, and can only support whether there is a cell that meets the cell reselection condition among the cells supporting TMGI#2. When there is a cell that meets the cell reselection condition, the terminal can reselect to the cell. When there is no cell that meets the cell reselection condition among the cells supporting TMGI#2, it is determined whether there is a cell that meets the cell reselection condition among the cells supporting TMGI#1. When there is a cell that meets the cell reselection condition, the terminal can reselect to the cell. When there is no cell that meets the cell reselection condition among the cells supporting TMGI#1, the cell reselection can be performed based on the traditional (legacy) cell reselection rule, which will not be described in detail in this disclosure.

It should be noted that the cell reselection condition may include at least one of the following: S criterion, R criterion, and may also include other conditions, which are not limited in the present disclosure.

Furthermore, the method of preferentially reselecting to a cell supporting a high-priority multicast service is not limited to the above two methods. For example, in addition to considering the reselection priority associated with the multicast service in the above two methods, the reselection priority not associated with the multicast service may also be considered for cell reselection. For example, the terminal first reselects according to the reselection priority associated with one or more high-priority multicast services, and then reselects the cell according to the reselection priority not associated with the multicast service.

Among them, the reselection priority not associated with the multicast service includes at least one of the following: a reselection priority not associated with a specific multicast service (for example, a service being executed by the terminal, for example, a multicast service in which the terminal is interested); a reselection priority not associated with any multicast service, such as a traditional reselection priority.

In some embodiments, the reselection priority associated with the multicast service is configured for each multicast service respectively, or the reselection priority associated with the multicast service is configured for all multicast services.

Taking two multicast services TMGI#1 and TMGI#2, where the reselection priority includes the frequency priority, as an example, two configuration methods of the reselection priority associated with the multicast services are exemplified.

For example, the reselection priority associated with a multicast service is configured for each multicast service.

In some embodiments, the terminal may determine a final reselection priority (eg, called a multicast service-based reselection priority) according to the priority of the multicast service and a reselection priority configured for each multicast service (also referred to as an associated reselection priority).

In some embodiments, the reselection priority of a service association with a relatively higher priority is higher than the reselection priority of a service association with a relatively lower priority.

In some embodiments, when the reselection priority of a service association with a relatively higher priority conflicts with the reselection priority of a service association with a relatively lower priority, the cell reselection can be performed based on the reselection priority of the service association with a relatively higher priority. When the reselection priority of a service association with a relatively higher priority does not conflict with the reselection priority of a service association with a relatively lower priority, the cell reselection can be performed according to the reselection priority of each service association in descending order of priority of the multicast service.

For example, the frequency priority configured for TMGI#2 is f1＞f2 (the priority of frequency f1 is higher than the priority of frequency f2), and the frequency priority configured for TMGI#1 is f2＞f1. Although the frequency priority associated with TMGI#2 conflicts with the frequency priority associated with TMGI#1, the priority of TMGI#2 is higher than the priority of TMGI#1, so the cell reselection is performed based on the frequency priority associated with TMGI#2, that is, the cell reselection is performed according to the frequency priority f1＞f2. Based on this, the terminal can first determine whether there is a cell that meets the cell reselection condition among the cells corresponding to frequency f1. When there is a cell that meets the cell reselection condition, the terminal can reselect to the cell. When there is no cell that meets the cell reselection condition among the cells corresponding to f1, it is then determined whether there is a cell that meets the cell reselection condition among the cells corresponding to frequency f2.

For example, the frequency priority configured for TMGI#2 is f1>f2, and the frequency priority configured for TMGI#1 is f2>f3. The priority of TMGI#2 is higher than that of TMGI#1. The frequency priorities associated with TMGI#2 and TMGI#1 do not conflict. The network device performs cell reselection based on the reselection priorities associated with TMGI#2 and TMGI#1 from high to low. When determining the final reselection priority, the terminal gives priority to f1>f2, and then considers f2>f3. Accordingly, the terminal first determines whether there is a cell that meets the cell reselection condition in the cell corresponding to the frequency point f1. When there is a cell that meets the cell reselection condition, the terminal can reselect to the cell. When there is no cell that meets the cell reselection condition in the cell corresponding to f1, it is determined whether there is a cell that meets the cell reselection condition in the cell corresponding to the frequency point f2.

When there is no cell meeting the cell reselection condition among the cells corresponding to f2, the terminal performs cell reselection according to the reselection priority f2>f3 associated with TMGI#1. Since f2 has been considered, it is only necessary to determine whether there is a cell meeting the cell reselection condition among the cells corresponding to frequency point f3.

For example, the reselection priority associated with a multicast service is configured for all multicast services.

For example, if the frequency priority configured for TMGI#1 and TMGI#2 is f1>f2, the terminal can perform cell reselection according to the frequency priority f1>f2. For example, first determine whether there is a cell that meets the cell reselection condition among the cells corresponding to frequency f1. If there is a cell that meets the cell reselection condition, the terminal can reselect to the cell. If there is no cell that meets the cell reselection condition among the cells corresponding to f1, then determine whether there is a cell that meets the cell reselection condition among the cells corresponding to frequency f2.

In some embodiments, the priority information of the multicast service is determined by at least one of: the terminal; a network device.

In some embodiments, the network device may determine the priority information of the multicast service, and then indicate the priority information of the multicast service to the terminal, and the terminal may reselect a cell according to the priority information of the multicast service.

For example, the network device can determine the reselection priority of each multicast service respectively, and then indicate the reselection priority of each multicast service to the terminal. The terminal can reselect the cell according to the reselection priority associated with each service according to the priority of the multicast service from high to low.

For example, the network device may determine a reselection priority based on the multicast service according to the multicast service priority, and then send the reselection priority based on the multicast service to the terminal, and the terminal may reselect a cell according to the reselection priority based on the multicast service.

In some embodiments, the reselection priority based on the multicast service can be regarded as the reselection priority configured for all multicast services. The reselection priority based on the multicast service determined according to the priority of the multicast service can satisfy at least one of the following conditions because the priority of the multicast service is taken into consideration: the priority of the frequency point supporting the multicast service with a relatively high priority is relatively high, and the priority of the frequency point supporting the multicast service with a relatively low priority is relatively low.

In some embodiments, the terminal may autonomously determine priority information of the multicast service.

For example, the network device may determine the reselection priority of the multicast service for each multicast service, and then indicate the reselection priority of each multicast service to the terminal, while the priority of the multicast service may be determined by the terminal and indicated to the network device. Then, the terminal may reselect the cell according to the priority of the multicast service determined by the terminal and the reselection priority of each multicast service.

For example, the network device can send the reselection priority based on the multicast service to the terminal. The terminal can adjust the reselection priority based on the multicast service according to the priority of the multicast service, and indicate the adjusted reselection priority based on the multicast service to the network device. Then, the terminal can reselect the cell according to the adjusted reselection priority based on the multicast service.

For example, the network device can send the reselection priority based on the multicast service to the terminal. The terminal can adjust the reselection priority based on the multicast service according to its own capabilities (such as the ability to receive multicast services at a specific frequency), and indicate the adjusted reselection priority based on the multicast service to the network device. The terminal can then reselect the cell according to the adjusted reselection priority based on the multicast service.

Among them, the reselection priority based on multicast service adjusted according to the priority of multicast service can meet at least one of the following requirements because the priority of multicast service is taken into consideration: the priority of frequency points supporting multicast services with relatively higher priorities is relatively high, and the priority of frequency points supporting multicast services with relatively lower priorities is relatively low.

For example, the reselection priority based on the multicast service sent by the network device to the terminal includes f1>f2, wherein f1 supports TMGI#1 but does not support TMGI#2, while f2 supports TMGI#2. The terminal determines that the priority of TMGI#2 is higher than the priority of TMGI#1 according to the priority of the multicast service. Then, in order to ensure that the cell supporting TMGI#2 is reselected first, the terminal can adjust the reselection priority based on the multicast service to f2>f1, and indicate f2>f1 to the network device. Thus, the terminal can first determine whether there is a cell that meets the cell reselection condition in the cell corresponding to the frequency point f2. When there is a cell that meets the cell reselection condition, the terminal can reselect to the cell. When there is no cell that meets the cell reselection condition in the cell corresponding to f2, it is determined whether there is a cell that meets the cell reselection condition in the cell corresponding to the frequency point f1. Accordingly, it is beneficial to preferentially reselect to the cell corresponding to the frequency point supporting TMGI#2 (the cell also supports TMGI#2) to communicate with the terminal, so as to meet the communication needs of the terminal.

In some embodiments, priority information of the multicast service may be determined by the network device and the terminal.

For example, the network device can set the priority of the multicast service and the reselection priority corresponding to each multicast service. The terminal can then independently determine the priority of the multicast service, and then adjust the priority of the multicast service sent by the network device according to the independently determined priority of the multicast service. The adjusted priority of the multicast service can also be indicated to the network device, and then the terminal reselects the cell according to the adjusted priority of the multicast service and the reselection priority corresponding to each multicast service.

For example, the network device can send the reselection priority based on the multicast service to the terminal, and the terminal can independently determine the priority of the multicast service, and then adjust the received reselection priority based on the multicast service according to the autonomously determined priority of the multicast service, and indicate the adjusted reselection priority based on the multicast service to the network device, and then the terminal can reselect the cell according to the adjusted reselection priority based on the multicast service.

In some embodiments, the cell reselection method further includes: determining at least one of the following according to the terminal indication:

Information about the service being executed by the terminal;

Information about services of interest to the terminal.

Of course, the content indicated by the terminal to the network device is not limited to the above two types of information, and other content may also be indicated, such as the priority information of the multicast service when the terminal receives the multicast service, that is, the priority information of the multicast service being used when the terminal receives the multicast service.

In some embodiments, the terminal may indicate to the network device information about the service being executed by the terminal, or information about the service the terminal is interested in. Thus, the network device may learn information about the service being executed by the terminal (also called activated service) and information about the service the terminal is interested in.

In some embodiments, the service information includes at least one of the following:

Service identification information, such as at least one of the following: TMGI, MBS Session ID, MBS QoS flow ID;

Service-related cell reselection information.

In some embodiments, the service-associated cell reselection information includes at least one of the following: service-associated frequency information; service-associated frequency priority information.

In some embodiments, the frequency information associated with the multicast service may include information about the frequency supporting the multicast service, and the cell corresponding to the frequency supporting the multicast service may also support the multicast service. For example, the frequency information associated with the multicast service TMGI#1 is f1, f1 may support the inactive multicast service TMGI#1, and the cell corresponding to f1 supports the inactive multicast service TMGI#1.

In some embodiments, the frequency in the frequency priority information associated with the multicast service may include a frequency that supports the multicast service, and the cell corresponding to the frequency that supports the multicast service may also support the multicast service. For example, the frequency priority information associated with the multicast service associated with the multicast service TMGI#1 is f1>f2 (that is, the priority of frequency f1 is higher than the priority of frequency f2), f1 and f2 may support the inactive multicast service TMGI#1, the cell corresponding to f1 supports the inactive multicast service TMGI#1, and the cell corresponding to f2 supports the inactive multicast service TMGI#1.

In some embodiments, when determining the priority of a multicast service, the terminal may set the priority of the cell reselection information associated with the service being performed by the terminal to be relatively high, for example, setting the priority higher than the cell reselection information associated with the service not being performed by the terminal. Accordingly, it is beneficial to ensure that when the terminal performs cell reselection based on the cell reselection information associated with the multicast service, it can preferentially reselect the cell that supports the service being performed by the terminal, so that the terminal can continue to perform the service being performed in the reselected cell, which is beneficial to ensure service continuity.

For example, the network device determines that the frequency point that supports the terminal executing service TMGI#2 is f2 according to the first indication information, and the frequency point f1 does not support the terminal executing service TMGI#2. The terminal can determine that the reselection priority based on the multicast service is f2>f1, and then the reselection priority based on the multicast service can be indicated to the terminal. The terminal performs cell reselection based on this, so as to preferentially reselect to the cell that supports the terminal executing service TMGI#2.

For example, the terminal determines, based on the first indication information, that the cell reselection information associated with the terminal executing service TMGI#2 is f2>f1, and the cell reselection information associated with the terminal not executing service TMGI#1 is f1>f2, wherein f2>f1 has a higher priority than f1>f2, and the reselection priority based on the multicast service can be determined preferentially based on the cell reselection information with a relatively high priority, for example, the reselection priority based on the multicast service is determined to be f2>f1, and then the reselection priority based on the multicast service can be indicated to the terminal. The terminal performs cell reselection based on this, so as to preferentially reselect to the cell supporting the service TMGI#2 that the terminal is executing.

In some embodiments, when determining the priority of a multicast service, the terminal may set the priority of the cell reselection information associated with the service of interest to the terminal to be relatively high, for example, higher than the priority of the cell reselection information associated with the service of no interest to the terminal. Accordingly, it is beneficial to ensure that when the terminal performs cell reselection based on the cell reselection information associated with the multicast service, it can preferentially reselect the cell that supports the service of interest to the terminal, so that the terminal can perform the service of interest in the reselected cell, which is beneficial to meeting the needs of the terminal.

For example, the network device determines that the frequency point supporting the terminal's service of interest TMGI#2 is f2 according to the first indication information, and the frequency point f1 does not support the terminal's service of interest TMGI#2. The terminal can determine that the reselection priority based on the multicast service is f2>f1, and then the reselection priority based on the multicast service can be indicated to the terminal. The terminal performs cell reselection based on this, so as to preferentially reselect to the cell supporting the terminal's service of interest TMGI#2.

For example, according to the first indication information, it is determined that the cell reselection information associated with the terminal's service of interest TMGI#2 is f2>f1, and the cell reselection information associated with the terminal's service TMGI#1 is f1>f2, wherein f2>f1 has a higher priority than f1>f2, and the reselection priority based on the multicast service can be determined preferentially according to the cell reselection information with a relatively high priority, for example, the reselection priority based on the multicast service is determined to be f2>f1, and then the reselection priority based on the multicast service can be indicated to the terminal. The terminal performs cell reselection accordingly, so as to preferentially reselect to the cell supporting the service of interest TMGI#2 of the terminal.

In some embodiments, the network device includes at least one of the following: access network equipment (eg, base station); core network equipment (also referred to as core network function); operation, maintenance and management (OAM) equipment.

In some embodiments, the priority information of the multicast service is carried in at least one of the following: a broadcast message; a paging message; a proprietary signaling; a non-access stratum (NAS) message.

For example, the broadcast signaling includes at least one of the following: SIBx, MCCH message; for example, the dedicated signaling includes RRC signaling, for example, the RRC signaling includes RRC Release signaling.

For example, the network device includes an access network device, and the access network device may carry priority information of the multicast service and send it to the terminal via proprietary signaling and/or broadcast signaling.

For example, the network device includes a core network device, and the access network device may carry the priority information of the multicast service via a non-access layer message and send it to the terminal.

In some embodiments, the priority information of the multicast service is sent from the non-access layer to the access layer. Since the operations in the cell reselection process are mainly implemented by the access layer, the non-access layer sends the priority information of the multicast service to the access layer, so that the access layer can perform cell reselection according to the priority information of the multicast service.

In some embodiments, the multicast service includes at least one of the following: an activated multicast service; an inactivated multicast service.

For example, the priority information of the multicast service may include the priority information of the activated multicast service, may include the priority information of the inactivated multicast service, or may include the priority information of the activated multicast service and the priority information of the inactivated multicast service. In some embodiments, the activated multicast service may include the multicast service that allows the service reception to be performed in a non-connected state; in some embodiments, the inactivated multicast service may include the multicast service that allows the service reception to be performed in a non-connected state.

It should be noted that the multicast service is not activated, which means that the multicast service is in a state other than the activated state. For example, the state other than the activated state includes at least one of the following: deactivation, release, and suspension.

In some embodiments, the method further includes: determining multicast service information of a neighboring cell.

For example, the network device may determine the multicast service information of the neighboring cells from the neighboring cells or OAM, and then indicate the neighboring cell list to the terminal through the MCCH message. The neighboring cell list includes cells that provide the same service as the current serving cell.

For example, the network device may indicate the neighboring cell and the multicast service supported by the neighboring cell through at least one of the following: dedicated signaling, broadcast message, or paging message. The multicast service supported by the neighboring cell may be the same as or different from the multicast service provided by the current serving cell, which is not limited in this embodiment.

In some embodiments, when the terminal performs cell reselection, the candidate cells may include the current serving cell and the neighboring cells. The terminal may determine whether the candidate cell supports the multicast service based on the multicast service information of the neighboring cells, wherein the multicast service may be, for example, the multicast service being executed by the terminal or the multicast service of interest to the terminal. If the candidate cell supports the multicast service, the candidate cell may be reselected; if the candidate cell does not support the multicast service, it may be determined whether other cells at the same frequency point support the multicast service, or it may be determined whether the cell at the frequency point of the next priority point supports the multicast service.

It should be noted that the candidate cells that have not been reselected and the frequencies where the candidate cells are located may not be allowed to be reselected within the first time period. This is helpful to avoid considering cells and frequencies that do not meet the conditions during the cell reselection process, and is helpful to improve the efficiency of cell reselection.

In some embodiments, when a terminal performs cell reselection, it may first determine a candidate cell that supports a multicast service, and then select a cell from the candidate cells, where the multicast service may be, for example, a multicast service that the terminal is executing or a multicast service that the terminal is interested in. Then, the cell with the best signal quality is determined among the candidate cells, and it is determined whether the cell is a suitable cell. If it is not a suitable cell, it is determined whether other cells at the same frequency point are suitable cells, or it may be determined whether a cell at a frequency point with the next priority level is a suitable cell. For the method of determining a suitable cell, reference may be made to the relevant technology, and this disclosure will not be repeated here.

In some embodiments, when the terminal satisfies a first condition, the priority information of the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the priority information of the multicast service; a change in the session state of the multicast service.

In some embodiments, when the first time expires, the network device may determine that the priority information of the multicast service is invalid.

For example, the first time may be agreed upon by a protocol, or the first time may be sent by a network device to a terminal (for example, carried by broadcast signaling or proprietary signaling), or the first time may be limited by a timer, for example, when the timer times out, the terminal may determine that the priority information of the multicast service is invalid. For example, the broadcast signaling includes at least one of the following: SIBx, MCCH message; for example, the proprietary signaling includes RRC signaling, for example, the RRC signaling includes RRCRelease signaling.

In some embodiments, the network device fails to send priority information of the multicast service to the terminal through the dedicated signaling, and the timer can be a newly introduced timer, or the timer T320 can be reused. It should be noted that the duration of the timer can be set to a finite value or to infinity.

In some embodiments, the priority information of the multicast service is changed, and the terminal may determine that the priority information of the multicast service is invalid.

For example, the priority information of the multicast service includes at least one of the following three pieces of information: identification information of the multicast service; frequency information associated with the multicast service; and frequency priority information associated with the multicast service. If the information is changed, the network device can determine that the priority information of the multicast service is invalid.

In some embodiments, the terminal may determine that the priority information of the multicast service is invalid when the session state of the multicast service changes. For example, when the session of the multicast service is released, the terminal may determine that the priority information of the multicast service is invalid; for example, when the session of the multicast service is deactivated, the network device may determine that the priority information of the multicast service is invalid.

In some embodiments, when the priority information of the multicast service becomes invalid, the network device may resend the priority information of the multicast service to the terminal via proprietary signaling, or the terminal may receive broadcast signaling and obtain the priority information of the multicast service from the broadcast signaling, or the terminal may reselect a cell based on traditional cell reselection information.

In some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following:

A session that has joined the multicast service;

Support receiving multicast services in a non-connected state;

Supports cell reselection based on multicast service priority information.

In some embodiments, the cell reselection method further includes: receiving capability information sent by the terminal, wherein the capability information is used to indicate whether the terminal supports performing cell reselection according to priority information of the multicast service.

The terminal may send capability information to the network device, and through the capability information, the terminal may indicate to the network device whether the terminal supports cell reselection based on the priority information of the multicast service. For example, if the network device determines based on the capability information that the terminal supports cell reselection based on the priority information of the multicast service, the priority information of the multicast service may be sent to the terminal; if the network device determines based on the capability information that the terminal does not support cell reselection based on the priority information of the multicast service, the priority information of the multicast service may not be sent to the terminal to avoid wasting communication resources.

In some embodiments, the names of information, etc. are not limited to the names recorded in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "code element", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

In some embodiments, terms such as "moment", "time point", "time", and "time position" can be interchangeable, and terms such as "duration", "period", "time window", "window", and "time" can be interchangeable.

In some embodiments, "obtain", "obtain", "get", "receive", "transmit", "bidirectional transmission", "send and/or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from high levels, obtaining by self-processing, autonomous implementation, etc.

In some embodiments, terms such as "send", "transmit", "report", "send", "transmit", "bidirectional transmission", "send and/or receive" can be used interchangeably.

It should be noted that for other contents involved in this embodiment, please refer to the description of the relevant contents in the previous embodiments, which will not be repeated here.

Corresponding to the aforementioned embodiments of the cell reselection method, the present disclosure also provides embodiments of a cell reselection apparatus, a terminal and a network device.

The embodiment of the present disclosure also provides a terminal, comprising: one or more processors; a processor coupled to the one or more processors; A memory of multiple processors, wherein executable instructions are stored in the memory, and when the executable instructions are executed by the one or more processors, the terminal executes the cell reselection method described in the first aspect and the optional embodiment of the first aspect.

FIG5 is a schematic block diagram of a cell reselection device according to an embodiment of the present disclosure. The device may be arranged in a terminal, as shown in FIG5 , and the device includes: a processing module 501 .

In some embodiments, the processing module is used to perform cell reselection according to priority information of the multicast service.

In some embodiments, the priority information of the multicast service is used by the terminal to preferentially reselect a cell supporting a high-priority multicast service.

In some embodiments, the priority information of the multicast service includes at least one of the following: the priority of the multicast service; and the reselection priority associated with the multicast service.

In some embodiments, the reselection priority associated with the multicast service is configured for each multicast service respectively, or the reselection priority associated with the multicast service is configured for all multicast services.

In some embodiments, the reselection priority includes at least one of the following: frequency priority; cell priority.

In some embodiments, the priority information of the multicast service is determined by at least one of: the terminal; a network device.

In some embodiments, the apparatus further comprises: a transceiver module, configured to indicate to the network device at least one of the following: information about a service being executed by the terminal; and information about a service of interest to the terminal.

In some embodiments, the service information includes at least one of the following: identification information of the service; and cell reselection information associated with the service.

In some embodiments, the information indicated to the network device is used to assist the network device in determining priority information of the multicast service.

In some embodiments, the network equipment includes at least one of the following: access network equipment; core network equipment; operation, maintenance and management equipment.

In some embodiments, the priority information of the multicast service is carried in at least one of the following: a broadcast message; a paging message; a proprietary signaling; a non-access layer message.

In some embodiments, the priority information of the multicast service is carried in a non-access layer message, and the device further includes: a transceiver module, which is used to send the priority information of the multicast service to the access layer through the non-access layer.

In some embodiments, the multicast service includes at least one of the following: an activated multicast service; an inactivated multicast service.

In some embodiments, the processing module is further used to determine multicast service information of a neighboring cell.

In some embodiments, when the terminal satisfies a first condition, the priority information of the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the priority information of the multicast service; a change in the session state of the multicast service.

In some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following: joining a session of a multicast service; supporting reception of a multicast service in a non-connected state; and supporting cell reselection based on priority information of the multicast service.

In some embodiments, the apparatus further comprises: a transceiver module, configured to send capability information to a network device, wherein the capability information is used to indicate whether the terminal supports cell reselection according to priority information of a multicast service.

It should be noted that the modules in the terminal are not limited to the modules in the above embodiments, and may also include other modules, such as a storage module, a display module, etc.

An embodiment of the present disclosure also proposes a network device, comprising: one or more processors; a memory coupled to the one or more processors, the memory storing executable instructions, and when the executable instructions are executed by the one or more processors, the network device executes the cell reselection method described in the second aspect and the optional embodiments of the second aspect.

Fig. 6 is a schematic block diagram of a cell reselection device according to an embodiment of the present disclosure. The device can be set in a network device, as shown in Fig. 6, the device includes: a transceiver module 601, which is used to send priority information of a multicast service to a terminal, wherein the priority information of the multicast service is used by the terminal to perform cell reselection.

In some embodiments, the priority information of the multicast service is used by the network device to preferentially reselect a cell that supports a high-priority multicast service.

In some embodiments, the priority information of the multicast service includes at least one of the following: the priority of the multicast service; and the reselection priority associated with the multicast service.

In some embodiments, the reselection priority associated with the multicast service is configured for each multicast service respectively, or the reselection priority associated with the multicast service is configured for all multicast services.

In some embodiments, the reselection priority includes at least one of the following: frequency priority; cell priority.

In some embodiments, the priority information of the multicast service is determined by at least one of: the terminal; a network device.

In some embodiments, the apparatus further comprises: a processing module, configured to determine at least one of the following according to the terminal indication: information about a service being executed by the terminal; information about a service of interest to the terminal.

In some embodiments, the service information includes at least one of the following: identification information of the service; and cell reselection information associated with the service.

In some embodiments, the information indicated by the terminal to the network device is used to assist the network device in determining priority information of the multicast service.

In some embodiments, the network equipment includes at least one of the following: access network equipment; core network equipment; operation, maintenance and management equipment.

In some embodiments, the priority information of the multicast service is carried in at least one of the following: a broadcast message; a paging message; a proprietary signaling; a non-access layer message.

In some embodiments, the priority information of the multicast service is sent from the non-access layer to the access layer.

In some embodiments, the multicast service includes at least one of the following: an activated multicast service; an inactivated multicast service.

In some embodiments, the device further includes: a processing module, configured to determine multicast service information of a neighboring cell.

In some embodiments, when the terminal satisfies a first condition, the priority information of the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the priority information of the multicast service; a change in the session state of the multicast service.

In some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following: joining a session of a multicast service; supporting reception of a multicast service in a non-connected state; and supporting cell reselection based on priority information of the multicast service.

In some embodiments, the transceiver module is further used to receive capability information sent by the terminal, wherein the capability information is used to indicate whether the terminal supports cell reselection according to priority information of the multicast service.

It should be noted that the modules in the network device are not limited to the modules in the above embodiments, and may also include other modules, such as a storage module.

For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

An embodiment of the present disclosure also proposes a communication device, comprising: one or more processors; wherein the processor is used to call instructions to enable the communication device to execute a cell reselection method described in any one of the first aspect, the second aspect, and the optional embodiments of the first aspect and the second aspect.

An embodiment of the present disclosure also proposes a communication system, including a terminal and a network device, wherein the terminal is configured to implement the cell reselection method described in any one of the first aspect and the optional embodiments of the first aspect, and the network device is configured to implement the cell reselection method described in any one of the second aspect and the optional embodiments of the second aspect.

An embodiment of the present disclosure further proposes a storage medium storing instructions, which, when executed on a communication device, enables the communication device to execute a cell reselection method described in any one of the first aspect, the second aspect, and the optional embodiments of the first aspect and the second aspect.

The embodiments of the present disclosure also propose a device for implementing any of the above methods, for example, a device is proposed, the above device includes a unit or module for implementing each step performed by the terminal in any of the above methods. For another example, another device is also proposed, including a unit or module for implementing each step performed by a network device (such as an access network device, a core network function node, a core network device, etc.) in any of the above methods.

It should be understood that the division of the units or modules in the above device is only a division of logical functions, which can be fully or partially integrated into one physical entity or physically separated in actual implementation. In addition, the units or modules in the device can be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and instructions are stored in the memory. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory inside the device or a memory outside the device. Alternatively, the units or modules in the device may be implemented in the form of hardware circuits, and the functions of some or all of the units or modules may be implemented by designing the hardware circuits. The hardware circuits may be understood as one or more processors; for example, in one implementation, the hardware circuits are application-specific integrated circuits (ASICs), and the functions of some or all of the above units or modules may be implemented by designing the logical relationship of the components in the circuits; for another example, in another implementation, the hardware circuits may be implemented by programmable logic devices (PLDs), and Field Programmable Gate Arrays (FPGAs) may be used as an example, which may include a large number of logic gate circuits, and the connection relationship between the logic gate circuits may be configured by configuring the configuration files, thereby implementing the functions of some or all of the above units or modules. All units or modules of the above devices may be implemented in the form of software called by the processor, or in the form of hardware circuits, or in the form of software called by the processor, and the remaining part may be implemented in the form of hardware circuits.

In the embodiments of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor may be a circuit with instruction reading and execution capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or digital signal processor (DSP), etc.; in another implementation, the processor can realize certain functions through the logical relationship of the hardware circuit, and the logical relationship of the above hardware circuit is fixed or reconfigurable, such as the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading the configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to realize the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

FIG7 is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. The communication device 7100 may be a network device (e.g., an access network device, a core network device, etc.), or a terminal (e.g., a user device, etc.), or a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. The communication device 7100 may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

As shown in FIG. 7 , the communication device 7100 includes one or more processors 7101. The processor 7101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and the communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a program, and process the data of the program. The processor 7101 is used to call instructions so that the communication device 7100 executes any of the above methods.

In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memory 7102 may also be outside the communication device 7100.

In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the communication steps such as sending and receiving in the above method are executed by the transceiver 7103, and the other steps are executed by the processor 7101.

In some embodiments, the transceiver may include a receiver and a transmitter, and the receiver and the transmitter may be separate or integrated. Optionally, the terms such as transceiver, transceiver unit, transceiver, transceiver circuit, etc. may be replaced with each other, the terms such as transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

Optionally, the communication device 7100 further includes one or more interface circuits 7104, which are connected to the memory 7102. The interface circuit 7104 can be used to receive signals from the memory 7102 or other devices, and can be used to send signals to the memory 7102 or other devices. For example, the interface circuit 7104 can read instructions stored in the memory 7102 and send the instructions to the processor 7101.

The communication device 7100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

Fig. 8 is a schematic diagram of the structure of a chip 8200 provided in an embodiment of the present disclosure. In the case where the communication device 7100 may be a chip or a chip system, reference may be made to the schematic diagram of the structure of the chip 8200 shown in Fig. 8, but the present disclosure is not limited thereto.

The chip 8200 includes one or more processors 8201, and the processor 8201 is used to call instructions so that the chip 8200 executes any of the above methods.

In some embodiments, the chip 8200 further includes one or more interface circuits 8202, the interface circuits 8202 are connected to the memory 8203, the interface circuits 8202 can be used to receive signals from the memory 8203 or other devices, and the interface circuits 8202 can be used to send signals to the memory.

8203 or other devices to send signals. For example, the interface circuit 8202 can read the instructions stored in the memory 8203 and send the instructions to the processor 8201. Optionally, the terms such as interface circuit, interface, transceiver pin, transceiver, etc. can be replaced with each other.

In some embodiments, the chip 8200 further includes one or more memories 8203 for storing instructions. Optionally, all or part of the memory 8203 may be outside the chip 8200.

The present disclosure also proposes a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a temporary storage medium.

The present disclosure also proposes a program product, which, when executed by the communication device 7100, enables the communication device 7100 to execute any of the above methods. Optionally, the program product is a computer program product.

The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to execute any one of the above methods.

Claims (41)

A cell reselection method, characterized in that it is performed by a terminal, and the method comprises: Cell reselection is performed based on the priority information of the multicast service. The method according to claim 1 is characterized in that the priority information of the multicast service is used by the terminal to preferentially reselect a cell that supports a high-priority multicast service. The method according to claim 1 or 2, characterized in that the priority information of the multicast service includes at least one of the following: Priority of multicast services; Reselection priority of multicast service association. The method according to claim 3 is characterized in that the reselection priority associated with the multicast service is configured separately for each multicast service, or the reselection priority associated with the multicast service is configured for all multicast services. The method according to claim 3 or 4, characterized in that the reselection priority includes at least one of the following: Frequency priority; Cell priority. The method according to any one of claims 1 to 5, characterized in that the priority information of the multicast service is determined by at least one of the following: the terminal; Network equipment. The method according to claim 1, characterized in that the method further comprises: Indicate to the network device at least one of the following: Information about the service being executed by the terminal; Information about services of interest to the terminal. The method according to claim 7, wherein the service information includes at least one of the following: Business identification information; Service-related cell reselection information. The method according to claim 7 or 8 is characterized in that the information indicated to the network device is used to assist the network device in determining priority information of the multicast service. The method according to any one of claims 6 to 9, characterized in that the network device comprises at least one of the following: Access network equipment; Core network equipment; Operate, maintain and manage equipment. The method according to claim 1, characterized in that the priority information of the multicast service is carried in at least one of the following: Broadcast messages; Paging messages; Proprietary signaling; Non-access stratum message. The method according to claim 11, characterized in that the priority information of the multicast service is carried in a non-access layer message, and the method further comprises: The priority information of the multicast service is sent to the access layer through the non-access layer. The method according to any one of claims 1 to 12, characterized in that the multicast service includes at least one of the following: Activated multicast services; Inactive multicast service. The method according to any one of claims 1 to 13, characterized in that the method further comprises: Determine the multicast service information of the neighboring cell. The method according to any one of claims 1 to 14, characterized in that when the terminal satisfies a first condition, the priority information of the multicast service becomes invalid, wherein the first condition includes at least one of the following: First time out; Change of priority information of the multicast service; The session state of the multicast service changes. The method according to any one of claims 1 to 15, characterized in that the terminal satisfies a second condition, wherein the second condition includes at least one of the following: A session that has joined the multicast service; Support receiving multicast services in a non-connected state; Supports cell reselection based on multicast service priority information. The method according to any one of claims 1 to 16, characterized in that the method further comprises: Sending capability information to a network device, wherein the capability information is used to indicate whether the terminal supports performing cell reselection according to priority information of the multicast service. A cell reselection method, characterized in that it is performed by a network device, and the method comprises: The priority information of the multicast service is sent to the terminal, wherein the priority information of the multicast service is used by the terminal to perform cell reselection. The method according to claim 18 is characterized in that the priority information of the multicast service is used by the network device to preferentially reselect a cell that supports a high-priority multicast service. The method according to claim 18 or 19, characterized in that the priority information of the multicast service includes at least one of the following: Priority of multicast services; Reselection priority of multicast service association. The method according to claim 20 is characterized in that the reselection priority associated with the multicast service is configured separately for each multicast service, or the reselection priority associated with the multicast service is configured for all multicast services. The method according to claim 20 or 21, characterized in that the reselection priority includes at least one of the following: Frequency priority; Cell priority. The method according to any one of claims 18 to 22, characterized in that the priority information of the multicast service is determined by at least one of the following: the terminal; Network equipment. The method according to claim 18, characterized in that the method further comprises: Determine at least one of the following based on the terminal instructions: Information about the service being executed by the terminal; Information about services of interest to the terminal. The method according to claim 24, characterized in that the service information includes at least one of the following: Business identification information; Service-related cell reselection information. The method according to claim 24 or 25, characterized in that the terminal indicates to the network device The information shown is used to assist the network device in determining the priority information of the multicast service. The method according to any one of claims 23 to 26, characterized in that the network device comprises at least one of the following: Access network equipment; Core network equipment; Operate, maintain and manage equipment. The method according to claim 18, characterized in that the priority information of the multicast service is carried in at least one of the following: Broadcast messages; Paging messages; Proprietary signaling; Non-access stratum message. The method according to claim 28 is characterized in that the priority information of the multicast service is sent from the non-access layer to the access layer. The method according to any one of claims 18 to 29, wherein the multicast service comprises at least one of the following: Activated multicast services; Inactive multicast service. The method according to any one of claims 18 to 30, characterized in that the method further comprises: Determine the multicast service information of the neighboring cell. The method according to any one of claims 18 to 31, characterized in that when the terminal satisfies a first condition, the priority information of the multicast service becomes invalid, wherein the first condition includes at least one of the following: First time out; Change of priority information of the multicast service; The session state of the multicast service changes. The method according to any one of claims 18 to 32, characterized in that the terminal satisfies a second condition, wherein the second condition includes at least one of the following: A session that has joined the multicast service; Support receiving multicast services in a non-connected state; Supports cell reselection based on multicast service priority information. The method according to any one of claims 18 to 33, characterized in that the method further comprises: The capability information sent by the terminal is received, wherein the capability information is used to indicate whether the terminal supports performing cell reselection according to priority information of the multicast service. A cell reselection device, characterized in that it is arranged in a terminal, and comprises: The processing module is used to perform cell reselection according to the priority information of the multicast service. A cell reselection device, characterized in that it is arranged in a network device, and comprises: The transceiver module is used to send priority information of the multicast service to the terminal, wherein the priority information of the multicast service is used by the terminal to perform cell reselection. A terminal, characterized by comprising: one or more processors; A memory coupled to the one or more processors, wherein executable instructions are stored in the memory, and when the one or more processors execute the executable instructions, the terminal executes the cell reselection method according to any one of claims 1 to 17. A network device, comprising: one or more processors; A memory coupled to the one or more processors, wherein executable instructions are stored in the memory, and when the executable instructions are executed by the one or more processors, the network device executes the cell reselection method according to any one of claims 18 to 34. A communication device, comprising: one or more processors; The processor is used to call instructions to enable the communication device to execute the cell reselection method described in any one of claims 1-17 and 18-34. A communication system, characterized in that it includes a terminal and a network device, wherein the terminal is configured to implement the cell reselection method described in any one of claims 1-17, and the network device is configured to implement the cell reselection method described in any one of claims 18-34. A storage medium storing instructions, characterized in that when the instructions are executed on a communication device, the communication device executes the cell reselection method as described in any one of claims 1-17 and 18-34.