Cell reselection method, terminal, network device, communication device, and storage medium

Abstract

The present disclosure relates to the technical field of communications, in particular to a cell reselection method, a terminal, a network device, a communication device, and a storage medium. The cell reselection method comprises: on the basis of cell reselection information associated with a multicast service, performing cell reselection, the cell reselection information associated with the multicast service being sent to a terminal by a network device. According to the present disclosure, a network device can send cell reselection information associated with a multicast service to a terminal, and the terminal can perform cell reselection on the basis of the cell reselection information associated with the multicast service. Since the cell reselection information is associated with a multicast service, the terminal performs cell reselection on the basis of the cell reselection information associated with the multicast service, such that reselection of a cell supporting the multicast service is facilitated, thereby helping the multicast service to be smoothly performed in the reselected cell.

Description

Cell reselection method, terminal, network device, communication device and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a cell reselection method, a terminal, a network device, a communication device, and a storage medium. Background Art

[0002] When a terminal is communicating in a mobile network, it can perform cell reselection, for example, reselecting from one cell to another so that the reselected cell can meet the terminal's communication needs. However, the current cell reselection operation has some technical problems.

[0003] Summary of the Invention

[0004] The embodiments of the present disclosure provide a cell reselection method, a terminal, a network device, a communication device, and a storage medium to solve technical problems in related technologies.

[0005] 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 based on cell reselection information associated with a multicast service, wherein the cell reselection information associated with the multicast service is sent by a network device to the terminal.

[0006] 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 cell reselection information associated with a multicast service to a terminal, wherein the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection.

[0007] According to a third aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: one or more processors; wherein the terminal is used to execute the cell reselection method described in the first aspect.

[0008] According to a fourth aspect of an embodiment of the present disclosure, a network device is proposed, comprising: one or more processors; wherein the network device is used to execute the cell reselection method described in the second aspect.

[0009] According to a fifth aspect of an embodiment of the present disclosure, a cell reselection device is proposed, comprising: a processing module for performing cell reselection based on cell reselection information associated with a multicast service, wherein the cell reselection information associated with the multicast service is sent by a network device to a terminal.

[0010] According to the sixth aspect of the embodiment of the present disclosure, a cell reselection device is proposed, which includes: a transceiver module for sending cell reselection information associated with a multicast service to a terminal, wherein the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection.

[0011] According to a 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.

[0012] 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.

[0013] According to a ninth aspect of an embodiment of the present disclosure, a storage medium is proposed, wherein the storage medium stores instructions. When the instructions are executed on a communication device, the communication device executes the cell reselection method as described in any one of the first and second aspects.

[0014] According to embodiments of the present disclosure, a network device can transmit cell reselection information associated with a multicast service to a terminal, and the terminal can perform cell reselection based on the cell reselection information associated with the multicast service. Because the cell reselection information is associated with the multicast service, the terminal can perform cell reselection based on the cell reselection information associated with the multicast service, facilitating reselection to a cell that supports the multicast service and facilitating smooth multicast service delivery in the reselected cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. 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 any creative work.

[0016] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0017] FIG2 is an interactive schematic diagram showing a cell reselection method according to an embodiment of the present disclosure.

[0018] FIG3 is a schematic flowchart showing a cell reselection method according to an embodiment of the present disclosure.

[0019] FIG4 is a schematic flowchart showing a cell reselection method according to an embodiment of the present disclosure.

[0020] FIG5 is a schematic block diagram of a terminal according to an embodiment of the present disclosure.

[0021] FIG6 is a schematic block diagram showing a network device according to an embodiment of the present disclosure.

[0022] FIG7 is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure.

[0023] FIG8 is a schematic diagram of the structure of a chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0024] Embodiments of the present disclosure provide a cell reselection method, a terminal, a network device, a communication device, and a storage medium.

[0025] In a first aspect, an embodiment of the present disclosure proposes a cell reselection method, comprising: performing cell reselection according to cell reselection information associated with a multicast service, wherein the cell reselection information associated with the multicast service is sent by a network device to a terminal.

[0026] In the above-described embodiment, when performing cell reselection, the terminal can perform the cell reselection based on the cell reselection information. In this embodiment, the cell reselection information can be associated with a multicast service. The network device can transmit the cell reselection information associated with the multicast service to the terminal, and the terminal can perform the cell reselection based on the cell reselection information associated with the multicast service. Because the cell reselection information is associated with the multicast service, the terminal can perform the cell reselection based on the cell reselection information associated with the multicast service, facilitating reselection to a cell that supports the multicast service and facilitating smooth multicast service delivery in the reselected cell.

[0027] In combination with some embodiments of the first aspect, in some embodiments, the cell reselection information associated with the multicast service is used by the terminal to preferentially reselect to a cell that supports the activated multicast service.

[0028] In combination with some embodiments of the first aspect, in some embodiments, the cell reselection information associated with the multicast service includes at least one of the following: identification information of the multicast service; frequency information associated with the multicast service; and frequency priority information associated with the multicast service.

[0029] In combination with some embodiments of the first aspect, in some embodiments, the multicast service includes at least one of the following: a first multicast service, wherein the first multicast service is activated; and a second multicast service, wherein the second multicast service is not activated.

[0030] In combination with some embodiments of the first aspect, in some embodiments, the cell reselection information associated with the multicast service includes at least one of the following: cell reselection information associated with the multicast service of the current serving node; and cell reselection information associated with the multicast service of a neighboring node.

[0031] In combination with some embodiments of the first aspect, in some embodiments, performing cell reselection according to cell reselection information associated with a multicast service includes: performing cell reselection according to cell reselection information associated with an activated multicast service.

[0032] In combination with some embodiments of the first aspect, in some embodiments, performing cell reselection based on cell reselection information associated with a multicast service includes: performing cell reselection based on cell reselection information associated with an activated multicast service and cell reselection information associated with an inactivated multicast service, wherein the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service.

[0033] In combination with some embodiments of the first aspect, in some embodiments, when the terminal meets a first condition, the cell reselection information associated with the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the cell reselection information associated with the multicast service; or a change in the session state of the multicast service.

[0034] 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: being in a non-connected state; joining a session of a multicast service; supporting reception of non-connected multicast services; and supporting cell reselection based on cell reselection information associated with the multicast service.

[0035] In combination with some embodiments of the first aspect, in some embodiments, the cell reselection method further includes: sending capability information to the network device, wherein the capability information is used to indicate whether the terminal supports cell reselection according to the cell reselection information associated with the multicast service.

[0036] In conjunction with some embodiments of the first aspect, in some embodiments, the capability information is used to indicate at least one of the following:

[0037] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the broadcast signaling;

[0038] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the dedicated signaling.

[0039] In combination with some embodiments of the first aspect, in some embodiments, the cell reselection information associated with the multicast service is sent via at least one of the following: broadcast signaling; or dedicated signaling.

[0040] In combination with some embodiments of the first aspect, in some embodiments, the terminal preferentially performs cell reselection according to cell reselection information associated with the multicast service carried in the broadcast signaling.

[0041] In a second aspect, an embodiment of the present disclosure proposes a cell reselection method, the method comprising: sending cell reselection information associated with a multicast service to a terminal, wherein the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection.

[0042] In the above embodiment, the network device can transmit cell reselection information associated with the multicast service to the terminal, and the terminal can perform cell reselection based on the cell reselection information associated with the multicast service. Because the cell reselection information is associated with the multicast service, the terminal can perform cell reselection based on the cell reselection information associated with the multicast service, thereby facilitating reselection to a cell that supports the multicast service and facilitating smooth multicast service delivery in the reselected cell.

[0043] In combination with some embodiments of the second aspect, in some embodiments, the cell reselection information associated with the multicast service is used by the terminal to preferentially reselect to a cell that supports the activated multicast service.

[0044] In conjunction with some embodiments of the second aspect, in some embodiments, the cell reselection information associated with the multicast service includes at least one of the following: identification information of the multicast service; frequency information associated with the multicast service; and frequency priority information associated with the multicast service.

[0045] In combination with some embodiments of the second aspect, in some embodiments, the multicast service includes at least one of the following: a first multicast service, wherein the first multicast service is activated; and a second multicast service, wherein the second multicast service is not activated.

[0046] In conjunction with some embodiments of the second aspect, in some embodiments, the cell reselection information associated with the multicast service includes at least one of the following: cell reselection information associated with the multicast service of the current serving node; and cell reselection information associated with the multicast service of a neighboring node.

[0047] In combination with some embodiments of the second aspect, in some embodiments, the cell reselection information associated with the multicast service of the neighboring node is sent to the network device based on at least one of the following methods: sent by the neighboring node to the network device through an inter-node interface; sent by an operation, maintenance and management device to the network device.

[0048] In combination with some embodiments of the second aspect, in some embodiments, the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection according to the cell reselection information associated with the activated multicast service.

[0049] In combination with some embodiments of the second aspect. In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection based on the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service, wherein the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service.

[0050] In combination with some embodiments of the second aspect, in some embodiments, when the terminal meets a first condition, the cell reselection information associated with the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the cell reselection information associated with the multicast service; or a change in the session state of the multicast service.

[0051] In conjunction with some embodiments of the second aspect, in some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following: being in a non-connected state; joining a session of a multicast service; supporting reception of non-connected multicast services; and supporting cell reselection based on cell reselection information associated with the multicast service.

[0052] In combination with some embodiments of the second aspect, 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 cell reselection according to the cell reselection information associated with the multicast service.

[0053] In conjunction with some embodiments of the second aspect, in some embodiments, the capability information is used to indicate at least one of the following:

[0054] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the broadcast signaling;

[0055] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the dedicated signaling.

[0056] In combination with some embodiments of the second aspect, in some embodiments, the cell reselection information associated with the multicast service is sent via at least one of the following: broadcast signaling; or dedicated signaling.

[0057] In combination with some embodiments of the second aspect, in some embodiments, the cell reselection information associated with the multicast service is used by the terminal to preferentially perform cell reselection according to the cell reselection information associated with the multicast service carried in broadcast signaling.

[0058] In a third aspect, an embodiment of the present disclosure proposes a terminal, comprising: one or more processors; wherein the terminal is used to execute the cell reselection method described in the first aspect and the optional embodiment of the first aspect.

[0059] In a fourth aspect, an embodiment of the present disclosure proposes a network device, comprising: one or more processors; wherein the network device is used to execute the cell reselection method described in the second aspect and the optional embodiment of the second aspect.

[0060] In a fifth aspect, an embodiment of the present disclosure proposes a cell reselection device, which includes: a processing module for performing cell reselection based on cell reselection information associated with a multicast service, wherein the cell reselection information associated with the multicast service is sent by a network device to a terminal.

[0061] In a sixth aspect, an embodiment of the present disclosure proposes a cell reselection device, which includes: a transceiver module for sending cell reselection information associated with a multicast service to a terminal, wherein the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection.

[0062] 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 xx method described in the first and second aspects, and the optional embodiments of the first and second aspects.

[0063] In the 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.

[0064] 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 and second aspects, and the optional embodiments of the first and second aspects.

[0065] In a 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 and second aspects, and the optional embodiments of the first and second aspects.

[0066] In an eleventh aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the methods described in the first and second aspects, and the optional embodiments of the first and second aspects.

[0067] It is understandable that the above-mentioned terminals, network devices, communication devices, communication systems, storage media, program products, and computer programs are all used to execute the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0068] The present disclosure provides a cell reselection method, terminal, network device, communication device, and storage medium. In some embodiments, the terms "cell reselection method," "information processing method," and "communication method" are interchangeable; the terms "cell reselection device," "terminal," and "network device" are interchangeable with "information processing device," and "communication device"; and the terms "information processing system," and "communication system" are interchangeable.

[0069] The embodiments of the present disclosure are not exhaustive and are merely 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 embodiments in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional embodiments of other embodiments.

[0070] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0071] 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.

[0072] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", etc., may mean "one and only one", or "one or more", "at least one", etc.

[0073] For example, when using articles such as “a”, “an”, and “the” in English in translation, the noun following the article can be understood as a singular expression or a plural expression.

[0074] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0075] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0076] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on 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); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0077] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on 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). The above is also applicable when there are more branches such as A, B, C, etc.

[0078] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish 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.

[0079] For example, if the description object is "field," the ordinal number preceding "field" in "first field" and "second field" does not restrict the position or order of the "fields." "First" and "second" do not restrict whether the modified "fields" are in the same message, nor do they restrict the order of the "first field" and "second field." For another example, if the description object is "level," the ordinal number preceding "level" in "first level" and "second level" does not restrict the priority of the "levels." For another example, the number of description objects is not restricted by the ordinal number and can be one or more. For example, in the case of "first device," the number of "devices" can be one or more. Furthermore, 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 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 or different information, and their content can be the same or different.

[0080] 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.

[0081] 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.

[0082] 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 less 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", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0083] 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.

[0084] The recorded names, "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject" and other terms can be used interchangeably.

[0085] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0086] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0087] 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, etc. can be used interchangeably.

[0088] 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 communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the 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.

[0089] 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 have a structure that has all or part of the functions of the terminal.

[0090] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0091] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0092] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0093] FIG1 is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0094] 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.

[0095] 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, 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 thereto.

[0096] 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 NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (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.

[0097] In some embodiments, a 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 an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0098] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0099] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0100] 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. Ordinary technicians in this field 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.

[0101] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1 , or a portion thereof, but are not limited thereto. The entities shown in FIG1 are illustrative only. The communication system may include all or part of the entities shown in FIG1 , or may include other entities outside of FIG1 . The number and form of the entities are arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0102] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), 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) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0103] FIG2 is an interactive schematic diagram showing a cell reselection method according to an embodiment of the present disclosure.

[0104] As shown in FIG2 , the cell reselection method may include the following steps:

[0105] Step S201: The network device sends first information to the terminal.

[0106] In some embodiments, the terminal receives first information.

[0107] In some embodiments, the first information includes cell reselection information.

[0108] In some embodiments, the first information is used by the terminal to perform cell reselection.

[0109] In some embodiments, the first information includes cell reselection information associated with the multicast service.

[0110] In some embodiments, the first information is used by the terminal to preferentially reselect to a cell that supports an activated multicast service.

[0111] In some embodiments, the cell reselection information associated with the multicast service includes at least one of the following: identification information of the multicast service; frequency information associated with the multicast service; and frequency priority information associated with the multicast service.

[0112] In some embodiments, the cell reselection information associated with the multicast service is sent via at least one of the following: broadcast signaling; proprietary signaling.

[0113] In some embodiments, the broadcast signaling includes at least one of the following:

[0114] System Information (SI), such as System Information Block (SIB);

[0115] Multicast service control channel (MBS Control Channel, MCCH) information.

[0116] In some embodiments, the dedicated signaling includes RRC signaling, such as radio resource control release (RRCRelease) signaling.

[0117] In some embodiments, the first information is used by the terminal to preferentially perform cell reselection according to cell reselection information associated with the multicast service carried in the broadcast signaling.

[0118] In some embodiments, the multicast service includes at least one of the following: a first multicast service, wherein the first multicast service is activated; and a second multicast service, wherein the second multicast service is not activated.

[0119] In some embodiments, the cell reselection information associated with the multicast service includes at least one of the following:

[0120] Cell reselection information associated with the multicast service of the current serving node;

[0121] Cell reselection information associated with the multicast service of the neighboring node.

[0122] In some embodiments, the cell reselection information associated with the multicast service of the neighboring node is sent to the network device based on at least one of the following methods: sent by the neighboring node to the network device through the inter-node interface; sent by the operation and maintenance management device to the network device.

[0123] In some embodiments, when the terminal meets a first condition, the cell reselection information associated with the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the cell reselection information associated with the multicast service; a change in the session status of the multicast service.

[0124] In some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following: being in a non-connected state; joining a session of a multicast service; supporting reception of non-connected multicast services; and supporting cell reselection based on cell reselection information associated with the multicast service.

[0125] In some embodiments, the unconnected state includes at least one of the following: an idle state and an inactive state.

[0126] In some embodiments, the network device receives second information sent by the terminal.

[0127] In some embodiments, the second information includes capability information.

[0128] In some embodiments, the capability information is used to indicate whether the terminal supports cell reselection according to cell reselection information associated with the multicast service.

[0129] In some embodiments, the capability information is used to indicate at least one of the following:

[0130] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the broadcast signaling;

[0131] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the dedicated signaling.

[0132] Step S201: The terminal reselects a cell according to the first information.

[0133] In some embodiments, the terminal preferentially reselects to a cell that supports an activated multicast service.

[0134] In some embodiments, the terminal performs cell reselection according to the cell reselection information associated with the activated multicast service.

[0135] In some embodiments, the terminal preferentially performs cell reselection based on cell reselection information associated with the multicast service carried in the broadcast signaling.

[0136] In some embodiments, the terminal performs cell reselection based on cell reselection information associated with an activated multicast service and cell reselection information associated with an inactivated multicast service, wherein the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service.

[0137] The communication method involved in the embodiments of the present disclosure may include at least one of steps S201 and S202. For example, step S201 may be implemented as an independent embodiment, step S202 may be implemented as an independent embodiment, and steps S201+S202 may be implemented as independent embodiments, but are not limited thereto.

[0138] 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.

[0139] In some embodiments, step S201 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0140] In some embodiments, step S202 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0141] In some embodiments, reference may be made to other optional embodiments described before or after the description corresponding to FIG. 2 .

[0142] In some embodiments, a terminal can perform multicast service communications. In some embodiments, the multicast service can be marked by a multicast service identifier, for example, the multicast service identifier includes at least one of the following: a temporary mobile group identity (TMGI), a multicast broadcast service session (MBS) session identifier, and a multicast broadcast service quality of service (MBS QoS) flow identifier.

[0143] 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.

[0144] 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.

[0145] 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 multicast service reception configuration to the terminal via broadcast signaling. The terminal may receive the multicast service according to the multicast service reception configuration.

[0146] It should be noted that the connected state and the non-connected state refer to the Radio Resource Control (RRC) state of the terminal. In some embodiments, the non-connected state includes at least one of the following: idle state and inactive state.

[0147] In some embodiments, the broadcast signaling includes at least one of the following:

[0148] System information (SI), such as system information blocks (SIBs);

[0149] Multicast traffic control channel (MCCH) information.

[0150] In some embodiments, the dedicated signaling includes RRC signaling, such as radio resource control release (RRCRelease) signaling.

[0151] In some embodiments, taking a non-connected multicast service as an example, a non-connected multicast service refers to a multicast service that can be performed in a non-connected state. To support the continuity of the non-connected multicast service, when a terminal performs cell reselection and reselects to a cell that does not support inactive multicast services or cannot send a multicast service reception configuration via the MCCH, the terminal can trigger a radio resource control resumption (RRCResume) to enter a connected state, and then obtain the multicast service reception configuration in the connected state.

[0152] The reason why terminals need to perform multicast services in the non-connected state is generally because network resources are limited, making it difficult for terminals to perform multicast services in the connected state. Therefore, in the above situation, after entering the connected state, the terminal is likely to enter the non-connected state again due to limited network resources. In order to maintain the continuity of the non-connected multicast service, it must enter the connected state again. Therefore, in this case, the terminal may frequently enter the connected state, resulting in a waste of resources.

[0153] In a first aspect, embodiments of the present disclosure provide a cell reselection method. Figure 3 is a schematic flow chart illustrating a cell reselection method according to an embodiment of the present disclosure. The cell reselection method illustrated in this embodiment may be executed by a terminal.

[0154] As shown in FIG3 , the information sending method may include the following steps:

[0155] In step S301, cell reselection is performed according to cell reselection information associated with the multicast service, wherein the cell reselection information associated with the multicast service is sent by a network device to a terminal.

[0156] It should be noted that the embodiment shown in FIG. 3 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 does not limit it.

[0157] In some embodiments, when performing cell reselection, a terminal may perform cell reselection based on cell reselection information. In this embodiment, the cell reselection information may be associated with a multicast service. The network device may transmit the cell reselection information associated with the multicast service to the terminal, and the terminal may perform cell reselection based on the cell reselection information associated with the multicast service. Because the cell reselection information is associated with the multicast service, the terminal can perform cell reselection based on the cell reselection information associated with the multicast service, facilitating reselection to a cell that supports the multicast service and facilitating smooth multicast service delivery in the reselected cell.

[0158] For example, taking the inactive multicast service as an example, the terminal performs cell reselection based on the cell reselection information associated with the inactive multicast service, facilitating reselection to a cell that supports the inactive multicast service. This allows the terminal to smoothly perform the inactive multicast service in the reselected cell without triggering radio resource control to resume the connected state, thus avoiding the aforementioned technical issue of the terminal frequently entering the connected state.

[0159] In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to preferentially reselect to a cell that supports the activated multicast service.

[0160] The terminal performs cell reselection based on the cell reselection information associated with the multicast service, and can preferentially reselect to a cell that supports the activated multicast service rather than preferentially reselect to a cell that supports the inactivated multicast service. This is beneficial for the terminal to be able to perform the activated multicast service in the reselected cell.

[0161] In some embodiments, the cell reselection information associated with the multicast service includes at least one of the following:

[0162] Identification information of the multicast service, such as at least one of the following: TMGI, MBS Session ID, MBS QoS flow ID;

[0163] Frequency information associated with multicast services;

[0164] Frequency priority information associated with multicast services.

[0165] In the embodiment of the present disclosure, the cell reselection information associated with the multicast service may include identification information of the multicast service, and may also include frequency information associated with the multicast service and frequency priority information associated with the multicast service.

[0166] Based on the cell reselection information associated with the multicast service, the terminal can determine the frequency information associated with the multicast service and the frequency priority information associated with the multicast service, and then can select the frequency information associated with the multicast service and / or the frequency priority information associated with the multicast service based on which the cell reselection is based according to the network device configuration, the terminal needs, or the protocol agreement.

[0167] In some embodiments, the frequency information associated with a multicast service may include information about frequencies that support the multicast service, and cells corresponding to frequencies that support the multicast service may also support the multicast service. For example, the frequency information associated with multicast service TMGI#1 is f1, and f1 may support inactive multicast service TMGI#1. The cell corresponding to f1 supports inactive multicast service TMGI#1.

[0168] In some embodiments, the frequencies in the frequency priority information associated with a multicast service may include frequencies that support the multicast service, and the cells corresponding to the frequencies that support the multicast service may also support the multicast service. For example, if the frequency priority information associated with multicast service TMGI#1 is f1>f2 (i.e., the priority of frequency f1 is higher than the priority of frequency f2), both 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.

[0169] For example, the terminal needs to perform inactive multicast service with TMGI#1 as its identifier. The terminal can perform cell reselection based on the frequency information and / or frequency priority information of the multicast service associated with TMGI#1 in the cell reselection information associated with the multicast service.

[0170] For example, if the frequency information associated with the multicast service associated with TMGI#1 is f1, and frequency f1 can support the inactive multicast service TMGI#1, then when the terminal reselects a cell, it can preferentially reselect the cell corresponding to frequency f1. The cell corresponding to f1 can also support the inactive multicast service TMGI#1. This ensures that the terminal can perform the inactive multicast service TMGI#1 in the reselected cell.

[0171] For example, the frequency information associated with the multicast service associated with TMGI#1 includes multiple frequencies, such as f1 and f2. Frequencies f1 and f2 can support the inactive multicast service TMGI#1. Therefore, when the terminal performs cell reselection, frequencies f1 and f2 can be considered the highest priority and the cell corresponding to frequencies f1 and f2 can be preferentially reselected. Cells corresponding to frequencies f1 and f2 can also support the inactive multicast service TMGI#1. This ensures that the terminal can perform the inactive multicast service TMGI#1 in the reselected cell. The priority between f1 and f2 may be determined by the terminal implementation.

[0172] For example, if the frequency priority information associated with the multicast service associated with TMGI#1 is f1>f2, frequency f1 can support the inactive multicast service TMGI#1, and the cell corresponding to f1 can also support the inactive multicast service TMGI#1. Frequency f2 can support the inactive multicast service TMGI#1, and the cell corresponding to f2 can also support the inactive multicast service TMGI#1. Therefore, when a terminal performs cell reselection, it can first determine whether the cell corresponding to frequency f1 meets the cell reselection conditions. If none of the cells corresponding to f1 meet the cell reselection conditions, it can then determine whether the cell corresponding to frequency f2 meets the cell reselection conditions. This helps ensure that the terminal preferentially reselects to the cell corresponding to the relatively higher-priority frequency f1 and that the terminal performs the inactive multicast service TMGI#1 in the reselected cell.

[0173] It should be noted that the cell reselection condition may include at least one of the following: S criterion and R criterion, which is not limited in the present disclosure.

[0174] In some embodiments, the multicast service includes at least one of the following:

[0175] A first multicast service, wherein the first multicast service has been activated;

[0176] The second multicast service is not activated.

[0177] For example, the cell reselection information associated with a multicast service may include cell reselection information associated with a first multicast service, may include cell reselection information associated with a second multicast service, or may include cell reselection information associated with the first multicast service and cell reselection information associated with the second multicast service. In some embodiments, the first multicast service may be a multicast service that allows service reception in a non-connected state; in some embodiments, the second multicast service may be a multicast service that allows service reception in a non-connected state.

[0178] It should be noted that the multicast service being inactive means that the multicast service is in a state other than the active state. For example, the state other than the active state includes at least one of the following: deactivation, release, and suspension.

[0179] In some embodiments, the cell reselection information associated with the multicast service sent by the network device includes at least one of the following:

[0180] Cell reselection information associated with the multicast service of the current serving node;

[0181] Cell reselection information associated with the multicast service of the neighboring node.

[0182] In some embodiments, the network device may send cell reselection information associated with the multicast service of the current serving node to the terminal, and may also send cell reselection information associated with the multicast service of the neighboring node to the terminal.

[0183] In some embodiments, when the network device is the current service node of the terminal, the cell reselection information associated with the multicast service sent by the current service node to the terminal may only include the cell reselection information associated with the multicast service of the current service frequency and / or the current service frequency cell, and does not include the cell reselection information associated with the multicast service of other frequencies and / or other cells.

[0184] For example, the network device can obtain the cell reselection information associated with the multicast service of the neighboring node from the neighboring node through the inter-node interface (such as the Xn interface), or the network device can obtain the cell reselection information associated with the multicast service of the neighboring node from the operation administration and maintenance (OAM) device.

[0185] For example, the current serving node includes at least one of the following: a current serving base station, a current serving cell. For example, the neighboring node includes at least one of the following: a neighboring base station, a neighboring cell.

[0186] In some embodiments, performing cell reselection according to cell reselection information associated with a multicast service includes: performing cell reselection according to cell reselection information associated with an activated multicast service.

[0187] The terminal performs cell reselection based on the cell reselection information associated with the multicast service. Specifically, the terminal may perform cell reselection based on the cell reselection information associated with the activated multicast service. For example, the terminal may determine the activated multicast service and then, from the cell reselection information associated with the multicast service, determine the cell reselection information associated with the activated multicast service. The terminal may then preferentially perform cell reselection based on the cell reselection information associated with the activated multicast service. This helps ensure that the terminal preferentially reselects to a cell that supports the activated multicast service, and helps the terminal be able to perform the activated multicast service in the reselected cell.

[0188] For example, if the terminal determines that the identifier of the activated multicast service is TMGI#1, the terminal may preferentially perform cell reselection based on the frequency information and / or frequency priority information associated with the multicast service associated with TMGI#1 in the cell reselection information associated with the multicast service.

[0189] For example, the frequency information associated with the multicast service associated with TMGI#1 is f1. Frequency f1 can support the activated multicast service TMGI#1. Therefore, when the terminal reselects a cell, it can preferably reselect the cell corresponding to frequency f1. The cell corresponding to f1 can also support the activated multicast service TMGI#1. Based on this, it can be ensured that the terminal can perform the activated multicast service TMGI#1 in the reselected cell.

[0190] For example, the frequency information associated with the multicast service associated with TMGI#1 includes multiple frequencies, such as f1 and f2. Frequencies f1 and f2 can support the activated multicast service TMGI#1. Therefore, when the terminal performs cell reselection, f1 and f2 can be considered the highest priority and can be preferentially reselected to the cell corresponding to frequencies f1 and f2. Cells corresponding to f1 and f2 can also support the activated multicast service TMGI#1. This ensures that the terminal can perform the activated multicast service TMGI#1 in the reselected cell. The priority between f1 and f2 may be determined by the terminal implementation.

[0191] For example, if the frequency priority information associated with the multicast service associated with TMGI#1 is f1>f2, frequency f1 can support the activated multicast service TMGI#1, and the cell corresponding to f1 can also support the activated multicast service TMGI#1. Frequency f2 can support the activated multicast service TMGI#1, and the cell corresponding to f2 can also support the activated multicast service TMGI#1. Therefore, when a terminal performs cell reselection, it can first determine whether the cell corresponding to frequency f1 meets the cell reselection conditions. If none of the cells corresponding to f1 meet the cell reselection conditions, it can then determine whether the cell corresponding to frequency f2 meets the cell reselection conditions. This helps ensure that the terminal preferentially reselects to the cell corresponding to the relatively higher-priority frequency f1, and helps ensure that the terminal performs the activated multicast service TMGI#1 in the reselected cell.

[0192] In some embodiments, cell reselection is performed based on cell reselection information associated with a multicast service, including: performing cell reselection based on cell reselection information associated with an activated multicast service and cell reselection information associated with an inactivated multicast service, wherein the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service.

[0193] The terminal performs cell reselection based on the cell reselection information associated with the multicast service, and specifically, performs cell reselection based on the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service. For example, the terminal can determine the activated multicast service and the inactivated multicast service, and then determine the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service in the cell reselection information associated with the multicast service. Since the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service, the terminal can preferentially perform cell reselection based on the cell reselection information associated with the multicast service. This helps ensure that the terminal preferentially reselects to a cell that supports the activated multicast service, and helps the terminal to perform the activated multicast service in the reselected cell.

[0194] For example, the terminal determines that the identifier of the activated multicast service is TMGI#1 and the identifier of the inactivated multicast service is TMGI#2. The terminal can determine the cell reselection information associated with the multicast service associated with TMGI#1 and the cell reselection information associated with the multicast service associated with TMGI#2 in the cell reselection information associated with the multicast service.

[0195] For example, the frequency information associated with the multicast service associated with TMGI#1 is f1. Frequency f1 can support the activated multicast service TMGI#1, and the cell corresponding to f1 can also support the activated multicast service TMGI#1. The frequency information associated with the multicast service associated with TMGI#2 is f2. Frequency f2 can support the inactivated multicast service TMGI#2, and the cell corresponding to f2 can also support the inactivated multicast service TMGI#2. Because the priority of frequency information f1 associated with the multicast service associated with TMGI#1 is higher than the priority of frequency information f2 associated with the multicast service associated with TMGI#2, when performing cell reselection, the terminal can prioritize cell reselection based on frequency information f1 associated with the multicast service associated with TMGI#1. For example, the terminal first determines whether the cell corresponding to frequency f1 meets the cell reselection conditions. If none of the cells corresponding to f1 meet the cell reselection conditions, the terminal then determines whether the cell corresponding to frequency f2 meets the cell reselection conditions. Accordingly, it can be ensured that the terminal preferentially reselects the cell corresponding to the frequency f1, thereby facilitating ensuring that the terminal performs the activated multicast service TMGI#1 in the reselected cell.

[0196] For example, the frequency information associated with the multicast service associated with TMGI#1 is f1 and f2. Frequencies f1 and f2 can support the activated multicast service TMGI#1. The frequency information associated with the multicast service associated with TMGI#2 is f3 and f4. Frequencies f3 and f4 can support the inactivated multicast service TMGI#2. Because the priority of frequency information f1 and f2 associated with the multicast service associated with TMGI#1 is higher than the priority of frequency information f3 and f4 associated with the multicast service associated with TMGI#2, when a terminal performs cell reselection, it can prioritize frequency information f1 and f2 associated with the multicast service associated with TMGI#1. For example, considering frequency information f1 and f2 as the highest priority, it can preferentially reselect to the cell corresponding to frequency information f1 and f2. The cell corresponding to frequency information f1 and f2 can also support the activated multicast service TMGI#1. This ensures that the terminal can perform the activated multicast service TMGI#1 in the reselected cell. The priority between frequency information f1 and f2 may be determined by the terminal implementation.

[0197] For example, the frequency priority information associated with the multicast service associated with TMGI#1 is f1>f2, and the frequency priority information associated with the multicast service associated with TMGI#2 is f2>f1. Frequency f1 can support the activated multicast service TMGI#1, and the cell corresponding to frequency f1 can also support the activated multicast service TMGI#1. Frequency f2 can support the activated multicast service TMGI#1, and the cell corresponding to frequency f2 can also support the activated multicast service TMGI#1. Because the frequency priority information f1>f2 associated with the multicast service associated with TMGI#1 is higher than the frequency priority information f2>f1 associated with the multicast service associated with TMGI#2, when performing cell reselection, the terminal can perform cell reselection based on the frequency priority information f1>f2. That is, it first determines whether the cell corresponding to frequency f1 meets the cell reselection condition. If none of the cells corresponding to frequency f1 meet the cell reselection condition, it then determines whether the cell corresponding to frequency f2 meets the cell reselection condition. This helps ensure that the terminal preferentially reselects the cell corresponding to the frequency f1 with a relatively higher priority, and helps ensure that the terminal performs the activated multicast service TMGI#1 in the reselected cell.

[0198] In some embodiments, the network device may determine the relative priority relationship between the priority of the cell reselection information associated with the multicast service and the priority of the traditional cell reselection information sent by the network device to the terminal based on the implementation (e.g., the specific network environment, the requirements of the network device), for example. The network device may determine that the priority of the cell reselection information associated with the multicast service is higher than the priority of the traditional cell reselection information, or the network device may determine that the priority of the cell reselection information associated with the multicast service is lower than the priority of the traditional cell reselection information, or the network device may determine that the priority of the cell reselection information associated with the multicast service is equal to the priority of the traditional cell reselection information. The traditional cell reselection information may be determined autonomously by the terminal, or may be sent to the terminal by the network device through broadcast signaling and / or proprietary signaling. In some embodiments, the traditional cell reselection information may include at least one of the following: cell reselection information not associated with any service characteristic; cell reselection information associated with any other service characteristic.

[0199] In some embodiments, the network device may determine the relative priority relationship between the priority of the cell reselection information associated with the multicast service sent by the network device to the terminal and the priority of the cell reselection information associated with other multicast services based on the implementation (e.g., the specific network environment, the requirements of the network device, etc.). For example, the network device may determine that the priority of the cell reselection information associated with the multicast service sent to the terminal is higher than the priority of the cell reselection information associated with other multicast services, or the network device may determine that the priority of the cell reselection information associated with the multicast service sent to the terminal is lower than the priority of the cell reselection information associated with other multicast services, or the network device may determine that the priority of the cell reselection information associated with the multicast service sent to the terminal is equal to the priority of the cell reselection information associated with other multicast services. The cell reselection information associated with other multicast services may be determined autonomously by the terminal, or may be sent to the terminal by the network device through broadcast signaling and / or proprietary signaling.

[0200] In some embodiments, when cell reselection information with equal priority exists, for example, cell reselection information associated with multicast services sent to a terminal has equal priority, or cell reselection information associated with other multicast services has equal priority, or cell reselection information associated with multicast services sent to a terminal has equal priority and cell reselection information associated with other multicast services has equal priority, or cell reselection information associated with multicast services sent to a terminal and traditional cell reselection information has equal priority, or cell reselection information associated with other multicast services and traditional cell reselection information has equal priority, the terminal may determine the priority of each cell reselection information with equal priority based on implementation (e.g., specific network environment, terminal requirements, etc.), network instructions, or protocol agreement. For example, when the priority of cell reselection information associated with a first multicast service sent to a terminal by a network device is equal to the priority of traditional cell reselection information, the terminal may determine, based on implementation, that the priority of the cell reselection information associated with the first multicast service is higher than the priority of the traditional cell reselection information.

[0201] In some embodiments, when the terminal satisfies a first condition, the cell reselection information associated with the multicast service becomes invalid (that is, when the terminal does not satisfy the first condition, the cell reselection information associated with the multicast service is valid), wherein the first condition includes at least one of the following:

[0202] First time out;

[0203] Changes in cell reselection information associated with multicast services;

[0204] The session status of a multicast service changes, such as releasing or deactivating a multicast service session.

[0205] In some embodiments, when the first time expires, the terminal may determine that the cell reselection information associated with the multicast service is invalid.

[0206] For example, the first time may be agreed upon by a protocol, or the first time may be sent by a network device to the terminal (e.g., carried by broadcast signaling or proprietary signaling), or the first time may be limited by a timer. For example, when the timer expires, the terminal may determine that the cell reselection information associated with 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, such as RRC signaling including RRCRelease signaling.

[0207] In some embodiments, the network device sends cell reselection information associated with the multicast service to the terminal via proprietary signaling. The timer may be a newly introduced timer, or timer T320 may be reused. It should be noted that the timer duration may be set to a finite value or to infinity.

[0208] In some embodiments, the cell reselection information associated with the multicast service changes, and the terminal may determine that the cell reselection information associated with the multicast service is invalid.

[0209] For example, the cell reselection information associated with 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 any of these three pieces of information changes, the terminal may determine that the cell reselection information associated with the multicast service is invalid.

[0210] In some embodiments, if the session state of a multicast service changes, the terminal may determine that the cell reselection information associated with the multicast service is invalid. For example, if the multicast service session is released, the terminal may determine that the cell reselection information associated with the multicast service is invalid; for example, if the multicast service session is deactivated, the terminal may determine that the cell reselection information associated with the multicast service is invalid.

[0211] In some embodiments, when the cell reselection information associated with the multicast service fails, the network device can resend the cell reselection information associated with the multicast service to the terminal through proprietary signaling, or the terminal can receive broadcast signaling and obtain the cell reselection information associated with the multicast service from the broadcast signaling, or the terminal can perform cell reselection based on traditional cell reselection information.

[0212] In some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following:

[0213] In a non-connected state, for example, the non-connected state includes at least one of the following: an inactive state, an idle state;

[0214] Joining a multicast service session;

[0215] Support receiving non-connection multicast services;

[0216] Supports cell reselection based on cell reselection information associated with multicast services.

[0217] In some embodiments, the cell reselection method further includes: sending capability information to the network device, wherein the capability information is used to indicate whether the terminal supports cell reselection according to the cell reselection information associated with the multicast service.

[0218] 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 cell reselection information associated with the multicast service. For example, if the network device determines based on the capability information that the terminal supports cell reselection based on the cell reselection information associated with the multicast service, the network device may send the cell reselection information associated with the multicast service to the terminal. For example, if the network device determines based on the capability information that the terminal does not support cell reselection based on the cell reselection information associated with the multicast service, the network device may not send the cell reselection information associated with the multicast service to the terminal.

[0219] In some embodiments, the capability information is used to indicate at least one of the following:

[0220] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the broadcast signaling;

[0221] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the dedicated signaling.

[0222] In some embodiments, a terminal may send capability information to a network device, and the capability information may indicate to the network device whether the terminal supports cell reselection based on cell reselection information associated with a multicast service carried in broadcast signaling. For example, if the network device determines based on the capability information that the terminal supports cell reselection based on cell reselection information associated with a multicast service carried in broadcast signaling, the multicast service-associated cell reselection information may be sent to the terminal via broadcast signaling. For example, if the network device determines based on the capability information that the terminal does not support cell reselection based on cell reselection information associated with a multicast service carried in broadcast signaling, the multicast service-associated cell reselection information may be sent to the terminal via proprietary signaling, or the multicast service-associated cell reselection information may not be sent to the terminal.

[0223] In some embodiments, a terminal may send capability information to a network device, and the capability information may indicate to the network device whether the terminal supports cell reselection based on cell reselection information associated with a multicast service carried in broadcast signaling. For example, if the network device determines based on the capability information that the terminal supports cell reselection based on cell reselection information associated with a multicast service carried in proprietary signaling, the multicast service-associated cell reselection information may be sent to the terminal via proprietary signaling. For example, if the network device determines based on the capability information that the terminal does not support cell reselection based on cell reselection information associated with a multicast service carried in proprietary signaling, the multicast service-associated cell reselection information may be sent to the terminal via broadcast signaling, or the multicast service-associated cell reselection information may not be sent to the terminal.

[0224] In some embodiments, the cell reselection information associated with the multicast service is sent via at least one of the following: broadcast signaling; dedicated signaling.

[0225] In some embodiments, the network device may send cell reselection information associated with the multicast service to the terminal via broadcast signaling. The terminal may receive and store the cell reselection information associated with the multicast service, and may perform cell reselection based on the cell reselection information associated with the activated multicast service carried in the broadcast signaling.

[0226] For example, the broadcast signaling sends cell reselection information associated with the multicast service to the terminal, which may include cell reselection information associated with the inactivated multicast service, and may also include cell reselection information associated with the unactivated multicast service. In the embodiment of the present disclosure, the terminal may preferentially perform cell reselection based on the cell reselection information associated with the activated multicast service.

[0227] In some embodiments, the network device may send cell reselection information associated with the multicast service to the terminal via dedicated signaling. The terminal may receive and store the cell reselection information associated with the multicast service, and may perform cell reselection based on the activated cell reselection information associated with the multicast service carried in the dedicated signaling.

[0228] For example, dedicated signaling sends cell reselection information associated with multicast services to the terminal, which may include cell reselection information associated with inactive multicast services, and may also include cell reselection information associated with inactivated multicast services. In an embodiment of the present disclosure, the terminal may preferentially perform cell reselection based on the cell reselection information associated with the activated multicast service.

[0229] In some embodiments, the network device may send cell reselection information associated with the multicast service to the terminal through broadcast signaling and proprietary signaling. For example, the network device may send identification information of the multicast service to the terminal through broadcast signaling, and send frequency information associated with the multicast service and frequency priority information associated with the multicast service to the terminal through proprietary signaling. For example, the network device may send frequency information associated with the multicast service and frequency priority information associated with the multicast service to the terminal through broadcast signaling, and send identification information of the multicast service to the terminal through proprietary signaling. The terminal may receive and store the cell reselection information associated with the multicast service, and when the multicast service session is activated, the terminal may perform cell reselection based on the cell reselection information associated with the activated multicast service carried in the broadcast signaling and proprietary signaling.

[0230] For example, broadcast signaling and proprietary signaling send cell reselection information associated with multicast services to the terminal, which may include cell reselection information associated with inactivated multicast services and cell reselection information associated with unactivated multicast services. In an embodiment of the present disclosure, the terminal may preferentially perform cell reselection based on the cell reselection information associated with the activated multicast service.

[0231] It should be noted that, after the terminal receives the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service, the terminal prioritizes cell reselection based on the cell reselection information associated with the activated multicast service, which means that the terminal may first perform cell reselection based on the cell reselection information associated with the activated multicast service when performing cell reselection, but if a cell meeting the cell reselection conditions cannot be determined, then perform cell reselection based on the cell reselection information associated with the inactivated multicast service; or, the terminal prioritizes cell reselection based on the cell reselection information associated with the activated multicast service, which means that when performing cell reselection, the terminal only performs cell reselection based on the cell reselection information associated with the activated multicast service, and does not perform cell reselection based on the cell reselection information associated with the inactivated multicast service.

[0232] In some embodiments, the terminal performs cell reselection according to the cell reselection information associated with the multicast service, and specifically, may preferentially perform cell reselection according to the cell reselection information associated with the multicast service carried in the broadcast signaling.

[0233] For example, the network device only sends the cell reselection information associated with the multicast service to the terminal through broadcast signaling, and the terminal can perform cell reselection according to the cell reselection information associated with the multicast service carried in the broadcast signaling.

[0234] For example, the network device only sends the cell reselection information associated with the multicast service to the terminal through dedicated signaling, and the terminal can perform cell reselection according to the cell reselection information associated with the multicast service carried in the dedicated signaling.

[0235] For example, the network device sends cell reselection information associated with the multicast service to the terminal through broadcast signaling, and sends cell reselection information associated with the multicast service to the terminal through proprietary signaling. The terminal can preferentially reselect the cell based on the cell reselection information associated with the multicast service carried in the broadcast signaling.

[0236] For example, the terminal preferentially performs cell reselection based on the cell reselection information associated with the multicast service carried in the broadcast signaling. For example, the cell reselection information associated with the multicast service carried in the broadcast signaling has a higher priority than the cell reselection information associated with the multicast service carried in the proprietary signaling.

[0237] For example, the cell reselection information associated with the multicast service carried by the broadcast signaling is the cell reselection information associated with the multicast service TMGI#1, and the cell reselection information associated with the multicast service carried by the dedicated signaling is the cell reselection information associated with the multicast service TMGI#2. The terminal can preferentially perform cell reselection based on the cell reselection information associated with TMGI#1 carried by the broadcast signaling.

[0238] It should be noted that, when the network device sends the cell reselection information associated with the multicast service to the terminal through broadcast signaling, and sends the cell reselection information associated with the multicast service to the terminal through proprietary signaling, the terminal prioritizes cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling, which means that the terminal may first perform cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling when performing cell reselection, but if a cell meeting the cell reselection conditions is not determined, then perform cell reselection based on the cell reselection information associated with the multicast service carried by the proprietary signaling; or, the terminal prioritizes cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling, which means that when performing cell reselection, the terminal only performs cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling, and does not perform cell reselection based on the cell reselection information associated with the multicast service carried by the proprietary signaling.

[0239] In some embodiments, the network device sends cell reselection information associated with the multicast service to the terminal through broadcast signaling, and sends cell reselection information associated with the multicast service to the terminal through proprietary signaling. The terminal can perform cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling and the cell reselection information associated with the multicast service sent to the terminal by proprietary signaling.

[0240] For example, broadcast signaling and proprietary signaling send cell reselection information associated with a multicast service to the terminal, wherein, if the broadcast signaling and proprietary signaling both carry associated cell reselection information for the same multicast service, the terminal performs cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling. If the cell reselection information associated with the multicast service provided in the proprietary signaling is not carried by the broadcast signaling, the terminal may perform cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling and the cell reselection information associated with the multicast service carried by the proprietary signaling. The cell reselection information associated with the multicast service may include cell reselection information associated with an activated multicast service and / or cell reselection information associated with an inactivated multicast service.

[0241] For example, the network device sends identification information of the multicast service to the terminal through broadcast signaling, and sends frequency information and frequency priority information associated with the multicast service to the terminal through proprietary signaling. The terminal can reselect the cell based on the cell reselection information associated with the multicast service carried by the broadcast signaling and the cell reselection information associated with the multicast service sent to the terminal by proprietary signaling.

[0242] For example, the network device may send frequency information and frequency priority information associated with the multicast service to the terminal through broadcast signaling, and send identification information of the multicast service to the terminal through proprietary signaling. The terminal may reselect a cell based on the cell reselection information associated with the multicast service carried in the broadcast signaling and the cell reselection information associated with the multicast service sent to the terminal through proprietary signaling.

[0243] In some embodiments, the terminal may also preferentially reselect a cell based on cell reselection information associated with a multicast service carried in broadcast signaling, and preferentially reselect a cell based on cell reselection information associated with an activated multicast service.

[0244] For example, the cell reselection information associated with the multicast service carried by the broadcast signaling includes the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service. Since the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service, the terminal can give priority to the cell reselection information associated with the activated multicast service carried by the broadcast signaling.

[0245] For example, the cell reselection information associated with multicast services carried in broadcast signaling includes cell reselection information associated with inactivated multicast services, while the cell reselection information associated with multicast services carried in proprietary signaling includes cell reselection information associated with activated multicast services. Because the priority of cell reselection information associated with activated multicast services is higher than the priority of cell reselection information associated with inactivated multicast services, the priority of cell reselection information associated with multicast services carried in broadcast signaling is higher than the priority of cell reselection information associated with multicast services carried in proprietary signaling.

[0246] In this case, the terminal may determine, based on implementation, the priority relationship between the cell reselection information associated with the inactivated multicast service carried in the broadcast signaling and the cell reselection information associated with the activated multicast service carried in the dedicated signaling.

[0247] For example, it can be determined that the priority of the cell reselection information associated with the activated multicast service carried by the proprietary signaling is higher than the priority of the cell reselection information associated with the inactivated multicast service carried by the broadcast signaling. The terminal can prioritize cell reselection based on the cell reselection information associated with the activated multicast service carried by the proprietary signaling.

[0248] For example, it can be determined that the priority of the cell reselection information associated with the inactivated multicast service carried by the broadcast signaling is higher than the priority of the cell reselection information associated with the activated multicast service carried by the proprietary signaling. The terminal can perform cell reselection based on the cell reselection information associated with the inactivated multicast service carried by the broadcast signaling.

[0249] In a second aspect, embodiments of the present disclosure provide a cell reselection method. Figure 4 is a schematic flow chart illustrating a cell reselection method according to an embodiment of the present disclosure. The cell reselection method illustrated in this embodiment can be executed by a terminal.

[0250] As shown in FIG4 , the information sending method may include the following steps:

[0251] In step S401, cell reselection information associated with a multicast service is sent to a terminal, wherein the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection.

[0252] 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 does not limit it.

[0253] In some embodiments, when performing cell reselection, a terminal may perform cell reselection based on cell reselection information. In this embodiment, a network device may transmit cell reselection information associated with a multicast service to the terminal, and the terminal may perform cell reselection based on the cell reselection information associated with the multicast service. Because the cell reselection information is associated with the multicast service, the terminal performs cell reselection based on the cell reselection information associated with the multicast service, facilitating reselection to a cell that supports the multicast service and facilitating smooth multicast service delivery in the reselected cell.

[0254] For example, taking the inactive multicast service as an example, the terminal performs cell reselection based on the cell reselection information associated with the inactive multicast service, facilitating reselection to a cell that supports the inactive multicast service. This allows the terminal to smoothly perform the inactive multicast service in the reselected cell without triggering radio resource control to resume the connected state, thus avoiding the aforementioned technical issue of the terminal frequently entering the connected state.

[0255] In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to preferentially reselect to a cell that supports the activated multicast service.

[0256] The terminal performs cell reselection based on the cell reselection information associated with the multicast service, and can preferentially reselect to a cell that supports the activated multicast service rather than preferentially reselect to a cell that supports the inactivated multicast service. This is beneficial for the terminal to be able to perform the activated multicast service in the reselected cell.

[0257] In some embodiments, the cell reselection information associated with the multicast service includes at least one of the following:

[0258] Identification information of the multicast service, such as at least one of the following: TMGI, MBS Session ID, MBS QoS flow ID;

[0259] Frequency information associated with multicast services;

[0260] Frequency priority information associated with multicast services.

[0261] In the embodiment of the present disclosure, the cell reselection information associated with the multicast service may include identification information of the multicast service, and may also include frequency information associated with the multicast service and frequency priority information associated with the multicast service.

[0262] Based on the cell reselection information associated with the multicast service, the terminal can determine the frequency information associated with the multicast service and the frequency priority information associated with the multicast service, and then can select the frequency information associated with the multicast service and / or the frequency priority information associated with the multicast service based on which the cell reselection is based according to the network device configuration, the terminal needs, or the protocol agreement.

[0263] In some embodiments, the frequency information associated with a multicast service may include information about frequencies that support the multicast service, and cells corresponding to frequencies that support the multicast service may also support the multicast service. For example, the frequency information associated with multicast service TMGI#1 is f1. f1 may support inactive multicast service TMGI#1, and the cell corresponding to f1 also supports inactive multicast service TMGI#1.

[0264] In some embodiments, the frequencies in the frequency priority information associated with a multicast service may include frequencies that support the multicast service, and the cells corresponding to the frequencies that support the multicast service may also support the multicast service. For example, if the frequency priority information associated with multicast service TMGI#1 is f1>f2 (i.e., the priority of frequency f1 is higher than the priority of frequency f2), both 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.

[0265] For example, the terminal needs to perform inactive multicast service with TMGI#1 as its identifier. The terminal can perform cell reselection based on the frequency information and / or frequency priority information of the multicast service associated with TMGI#1 in the cell reselection information associated with the multicast service.

[0266] For example, if the frequency information associated with the multicast service associated with TMGI#1 is f1, and frequency f1 can support the inactive multicast service TMGI#1, then when the terminal reselects a cell, it can preferentially reselect the cell corresponding to frequency f1. The cell corresponding to f1 can also support the inactive multicast service TMGI#1. This ensures that the terminal can perform the inactive multicast service TMGI#1 in the reselected cell.

[0267] For example, the frequency information associated with the multicast service associated with TMGI#1 includes multiple frequencies, such as f1 and f2. Frequencies f1 and f2 can support the inactive multicast service TMGI#1. Therefore, when the terminal performs cell reselection, frequencies f1 and f2 can be considered the highest priority and the cell corresponding to frequencies f1 and f2 can be preferentially reselected. Cells corresponding to frequencies f1 and f2 can also support the inactive multicast service TMGI#1. This ensures that the terminal can perform the inactive multicast service TMGI#1 in the reselected cell. The priority between f1 and f2 may be determined by the terminal implementation.

[0268] For example, if the frequency priority information associated with the multicast service associated with TMGI#1 is f1>f2, frequency f1 can support the inactive multicast service TMGI#1, and the cell corresponding to f1 can also support the inactive multicast service TMGI#1. Frequency f2 can support the inactive multicast service TMGI#1, and the cell corresponding to f2 can also support the inactive multicast service TMGI#1. Therefore, when a terminal performs cell reselection, it can first determine whether the cell corresponding to frequency f1 meets the cell reselection conditions. If none of the cells corresponding to f1 meet the cell reselection conditions, it can then determine whether the cell corresponding to frequency f2 meets the cell reselection conditions. This helps ensure that the terminal preferentially reselects to the cell corresponding to the relatively higher-priority frequency f1 and that the terminal performs the inactive multicast service TMGI#1 in the reselected cell.

[0269] It should be noted that the cell reselection condition may include at least one of the following: S criterion and R criterion, which is not limited in the present disclosure.

[0270] In some embodiments, the multicast service includes at least one of the following:

[0271] A first multicast service, wherein the first multicast service has been activated;

[0272] The second multicast service is not activated.

[0273] For example, the cell reselection information associated with a multicast service may include cell reselection information associated with a first multicast service, may include cell reselection information associated with a second multicast service, or may include cell reselection information associated with the first multicast service and cell reselection information associated with the second multicast service. In some embodiments, the first multicast service may be a multicast service that allows service reception in a non-connected state; in some embodiments, the second multicast service may be a multicast service that allows service reception in a non-connected state.

[0274] It should be noted that the multicast service being inactive means that the multicast service is in a state other than the active state. For example, the state other than the active state includes at least one of the following: deactivation, release, and suspension.

[0275] In some embodiments, the cell reselection information associated with the multicast service includes at least one of the following:

[0276] Cell reselection information associated with the multicast service of the current serving node;

[0277] Cell reselection information associated with the multicast service of the neighboring node.

[0278] In some embodiments, the network device may send cell reselection information associated with the multicast service of the current serving node to the terminal, and may also send cell reselection information associated with the multicast service of the neighboring node to the terminal.

[0279] In some embodiments, when the network device is the current service node of the terminal, the cell reselection information associated with the multicast service sent by the current service node to the terminal may only include the cell reselection information associated with the multicast service of the current service frequency and / or the current service frequency cell, and does not include the cell reselection information associated with the multicast service of other frequencies and / or other cells.

[0280] In some embodiments, the cell reselection information associated with the multicast service of the neighboring node is sent to the network device based on at least one of the following methods:

[0281] Sent by neighboring nodes to network devices through inter-node interfaces;

[0282] Sent by the operation, maintenance and management equipment to the network equipment.

[0283] For example, the network device can obtain the cell reselection information associated with the multicast service of the neighboring node from the neighboring node through the inter-node interface (such as the Xn interface), or the network device can obtain the cell reselection information associated with the multicast service of the neighboring node from the operation administration and maintenance (OAM) device.

[0284] For example, the current serving node includes at least one of the following: a current serving base station, a current serving cell. For example, the neighboring node includes at least one of the following: a neighboring base station, a neighboring cell.

[0285] In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection according to the cell reselection information associated with the activated multicast service.

[0286] The terminal performs cell reselection based on the cell reselection information associated with the multicast service. Specifically, the terminal may perform cell reselection based on the cell reselection information associated with the activated multicast service. For example, the terminal may determine the activated multicast service and then, from the cell reselection information associated with the multicast service, determine the cell reselection information associated with the activated multicast service. The terminal may then preferentially perform cell reselection based on the cell reselection information associated with the activated multicast service. This helps ensure that the terminal preferentially reselects to a cell that supports the activated multicast service, and helps the terminal be able to perform the activated multicast service in the reselected cell.

[0287] For example, if the terminal determines that the identifier of the activated multicast service is TMGI#1, the terminal may preferentially perform cell reselection based on the frequency information and / or frequency priority information associated with the multicast service associated with TMGI#1 in the cell reselection information associated with the multicast service.

[0288] For example, the frequency information associated with the multicast service associated with TMGI#1 is f1. Frequency f1 can support the activated multicast service TMGI#1. Therefore, when the terminal reselects a cell, it can preferably reselect the cell corresponding to frequency f1. The cell corresponding to f1 can also support the activated multicast service TMGI#1. Based on this, it can be ensured that the terminal can perform the activated multicast service TMGI#1 in the reselected cell.

[0289] For example, the frequency information associated with the multicast service associated with TMGI#1 includes multiple frequencies, such as f1 and f2. Frequencies f1 and f2 can support the activated multicast service TMGI#1. Therefore, when the terminal performs cell reselection, f1 and f2 can be considered the highest priority and can be preferentially reselected to the cell corresponding to frequencies f1 and f2. Cells corresponding to f1 and f2 can also support the activated multicast service TMGI#1. This ensures that the terminal can perform the activated multicast service TMGI#1 in the reselected cell. The priority between f1 and f2 may be determined by the terminal implementation.

[0290] For example, if the frequency priority information associated with the multicast service associated with TMGI#1 is f1>f2, frequency f1 can support the activated multicast service TMGI#1, and the cell corresponding to f1 can also support the activated multicast service TMGI#1. Frequency f2 can support the activated multicast service TMGI#1, and the cell corresponding to f2 can also support the activated multicast service TMGI#1. Therefore, when a terminal performs cell reselection, it can first determine whether the cell corresponding to frequency f1 meets the cell reselection conditions. If none of the cells corresponding to f1 meet the cell reselection conditions, it can then determine whether the cell corresponding to frequency f2 meets the cell reselection conditions. This helps ensure that the terminal preferentially reselects to the cell corresponding to the relatively higher-priority frequency f1, and helps ensure that the terminal performs the activated multicast service TMGI#1 in the reselected cell.

[0291] In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection based on the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service, wherein the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service.

[0292] The terminal performs cell reselection based on the cell reselection information associated with the multicast service, and specifically, performs cell reselection based on the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service. For example, the terminal can determine the activated multicast service and the inactivated multicast service, and then determine the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service in the cell reselection information associated with the multicast service. Since the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service, the terminal can preferentially perform cell reselection based on the cell reselection information associated with the multicast service. This helps ensure that the terminal preferentially reselects to a cell that supports the activated multicast service, and helps the terminal to perform the activated multicast service in the reselected cell.

[0293] For example, the terminal determines that the identifier of the activated multicast service is TMGI#1 and the identifier of the inactivated multicast service is TMGI#2. The terminal can determine the cell reselection information associated with the multicast service associated with TMGI#1 and the cell reselection information associated with the multicast service associated with TMGI#2 in the cell reselection information associated with the multicast service.

[0294] For example, the frequency information associated with the multicast service associated with TMGI#1 is f1. Frequency f1 can support the activated multicast service TMGI#1, and the cell corresponding to f1 can also support the activated multicast service TMGI#1. The frequency information associated with the multicast service associated with TMGI#2 is f2. Frequency f2 can support the inactivated multicast service TMGI#2, and the cell corresponding to f2 can also support the inactivated multicast service TMGI#2. Because the priority of frequency information f1 associated with the multicast service associated with TMGI#1 is higher than the priority of frequency information f2 associated with the multicast service associated with TMGI#2, when performing cell reselection, the terminal can prioritize cell reselection based on frequency information f1 associated with the multicast service associated with TMGI#1. For example, the terminal first determines whether the cell corresponding to frequency f1 meets the cell reselection conditions. If none of the cells corresponding to f1 meet the cell reselection conditions, the terminal then determines whether the cell corresponding to frequency f2 meets the cell reselection conditions. This helps ensure that the terminal preferentially reselects the cell corresponding to the frequency f1, and further helps ensure that the terminal performs the activated multicast service TMGI#1 in the reselected cell.

[0295] For example, the frequency information associated with the multicast service associated with TMGI#1 is f1 and f2. Frequencies f1 and f2 can support the activated multicast service TMGI#1. The frequency information associated with the multicast service associated with TMGI#2 is f3 and f4. Frequencies f3 and f4 can support the inactivated multicast service TMGI#2. Because the priority of frequency information f1 and f2 associated with the multicast service associated with TMGI#1 is higher than the priority of frequency information f3 and f4 associated with the multicast service associated with TMGI#2, when a terminal performs cell reselection, it can prioritize frequency information f1 and f2 associated with the multicast service associated with TMGI#1. For example, considering frequency information f1 and f2 as the highest priority, it can preferentially reselect to the cell corresponding to frequency information f1 and f2. The cell corresponding to frequency information f1 and f2 can also support the activated multicast service TMGI#1. This ensures that the terminal can perform the activated multicast service TMGI#1 in the reselected cell. The priority between frequency information f1 and f2 may be determined by the terminal implementation.

[0296] For example, the frequency priority information associated with the multicast service associated with TMGI#1 is f1>f2, and the frequency priority information associated with the multicast service associated with TMGI#2 is f2>f1. Frequency f1 can support the activated multicast service TMGI#1, and the cell corresponding to frequency f1 can also support the activated multicast service TMGI#1. Frequency f2 can support the activated multicast service TMGI#1, and the cell corresponding to frequency f2 can also support the activated multicast service TMGI#1. Because the frequency priority information f1>f2 associated with the multicast service associated with TMGI#1 is higher than the frequency priority information f2>f1 associated with the multicast service associated with TMGI#2, when performing cell reselection, the terminal can perform cell reselection based on the frequency priority information f1>f2. That is, it first determines whether the cell corresponding to frequency f1 meets the cell reselection condition. If none of the cells corresponding to frequency f1 meet the cell reselection condition, it then determines whether the cell corresponding to frequency f2 meets the cell reselection condition. This helps ensure that the terminal preferentially reselects the cell corresponding to f1 with a relatively higher priority, and helps ensure that the terminal performs the activated multicast service TMGI#1 in the reselected cell.

[0297] In some embodiments, when the terminal satisfies a first condition, the cell reselection information associated with the multicast service becomes invalid, wherein the first condition includes at least one of the following:

[0298] First time out;

[0299] Changes in cell reselection information associated with multicast services;

[0300] The session status of the multicast service changes.

[0301] In some embodiments, when the first time expires, the terminal may determine that the cell reselection information associated with the multicast service is invalid.

[0302] For example, the first time may be agreed upon by a protocol, or the first time may be sent by a network device to the terminal (e.g., carried by broadcast signaling or proprietary signaling), or the first time may be limited by a timer. For example, when the timer expires, the terminal may determine that the cell reselection information associated with 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, such as RRC signaling including RRCRelease signaling.

[0303] In some embodiments, the network device sends cell reselection information associated with the multicast service to the terminal via proprietary signaling. The timer may be a newly introduced timer, or timer T320 may be reused. It should be noted that the timer duration may be set to a finite value or to infinity.

[0304] In some embodiments, the cell reselection information associated with the multicast service changes, and the terminal may determine that the cell reselection information associated with the multicast service is invalid.

[0305] For example, the cell reselection information associated with 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 any of these three pieces of information changes, the terminal may determine that the cell reselection information associated with the multicast service is invalid.

[0306] In some embodiments, if the session state of a multicast service changes, the terminal may determine that the cell reselection information associated with the multicast service is invalid. For example, if the multicast service session is released, the terminal may determine that the cell reselection information associated with the multicast service is invalid; for example, if the multicast service session is deactivated, the terminal may determine that the cell reselection information associated with the multicast service is invalid.

[0307] In some embodiments, when the cell reselection information associated with the multicast service fails, the network device can resend the cell reselection information associated with the multicast service to the terminal through proprietary signaling, or the terminal can receive broadcast signaling and obtain the cell reselection information associated with the multicast service from the broadcast signaling, or the terminal can perform cell reselection based on traditional cell reselection information.

[0308] In some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following:

[0309] In a non-connected state, for example, the non-connected state includes at least one of the following: an inactive state, an idle state;

[0310] Joining a multicast service session;

[0311] Support receiving non-connection multicast services;

[0312] Supports cell reselection based on cell reselection information associated with multicast services.

[0313] 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 cell reselection according to cell reselection information associated with the multicast service.

[0314] A network device may receive capability information sent by a terminal and, based on the capability information, determine whether the terminal supports cell reselection based on cell reselection information associated with a multicast service. For example, if the network device determines, based on the capability information, that the terminal supports cell reselection based on cell reselection information associated with a multicast service, the network device may send the cell reselection information associated with the multicast service to the terminal. For example, if the network device determines, based on the capability information, that the terminal does not support cell reselection based on cell reselection information associated with a multicast service, the network device may not send the cell reselection information associated with the multicast service to the terminal.

[0315] In some embodiments, the capability information is used to indicate at least one of the following:

[0316] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the broadcast signaling;

[0317] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the dedicated signaling.

[0318] In some embodiments, a network device may receive capability information sent by a terminal, and the network device may determine, based on the capability information, whether the terminal supports cell reselection based on cell reselection information associated with a multicast service carried in broadcast signaling. For example, if the network device determines, based on the capability information, that the terminal supports cell reselection based on cell reselection information associated with a multicast service carried in broadcast signaling, the network device may send the cell reselection information associated with the multicast service to the terminal via broadcast signaling. For example, if the network device determines, based on the capability information, that the terminal does not support cell reselection based on cell reselection information associated with a multicast service carried in broadcast signaling, the network device may send the cell reselection information associated with the multicast service to the terminal via proprietary signaling, or may not send the cell reselection information associated with the multicast service to the terminal.

[0319] In some embodiments, a network device may receive capability information sent by a terminal, and the network device may determine, based on the capability information, whether the terminal supports cell reselection based on cell reselection information associated with a multicast service carried in broadcast signaling. For example, if the network device determines, based on the capability information, that the terminal supports cell reselection based on cell reselection information associated with a multicast service carried in proprietary signaling, the network device may send the cell reselection information associated with the multicast service to the terminal via proprietary signaling. For example, if the network device determines, based on the capability information, that the terminal does not support cell reselection based on cell reselection information associated with a multicast service carried in proprietary signaling, the network device may send the cell reselection information associated with the multicast service to the terminal via broadcast signaling, or may not send the cell reselection information associated with the multicast service to the terminal.

[0320] In some embodiments, the cell reselection information associated with the multicast service is sent via at least one of the following: broadcast signaling; dedicated signaling.

[0321] In some embodiments, the network device may send cell reselection information associated with the multicast service to the terminal via broadcast signaling. The terminal may receive and store the cell reselection information associated with the multicast service, and may perform cell reselection based on the cell reselection information associated with the activated multicast service carried in the broadcast signaling.

[0322] For example, the broadcast signaling sends cell reselection information associated with the multicast service to the terminal, which may include cell reselection information associated with the inactivated multicast service, and may also include cell reselection information associated with the unactivated multicast service. In the embodiment of the present disclosure, the terminal may preferentially perform cell reselection based on the cell reselection information associated with the activated multicast service.

[0323] In some embodiments, the network device may send cell reselection information associated with the multicast service to the terminal via dedicated signaling. The terminal may receive and store the cell reselection information associated with the multicast service, and may perform cell reselection based on the activated cell reselection information associated with the multicast service carried in the dedicated signaling.

[0324] For example, dedicated signaling sends cell reselection information associated with multicast services to the terminal, which may include cell reselection information associated with inactive multicast services, and may also include cell reselection information associated with inactivated multicast services. In an embodiment of the present disclosure, the terminal may preferentially perform cell reselection based on the cell reselection information associated with the activated multicast service.

[0325] In some embodiments, the network device may send cell reselection information associated with the multicast service to the terminal through broadcast signaling and proprietary signaling. For example, the network device may send identification information of the multicast service to the terminal through broadcast signaling, and send frequency information associated with the multicast service and frequency priority information associated with the multicast service to the terminal through proprietary signaling. For example, the network device may send frequency information associated with the multicast service and frequency priority information associated with the multicast service to the terminal through broadcast signaling, and send identification information of the multicast service to the terminal through proprietary signaling. The terminal may receive and store the cell reselection information associated with the multicast service, and when the multicast service session is activated, the terminal may perform cell reselection based on the cell reselection information associated with the activated multicast service carried in the broadcast signaling and proprietary signaling.

[0326] For example, broadcast signaling and proprietary signaling send cell reselection information associated with multicast services to the terminal, which may include cell reselection information associated with inactivated multicast services and cell reselection information associated with unactivated multicast services. In an embodiment of the present disclosure, the terminal may preferentially perform cell reselection based on the cell reselection information associated with the activated multicast service.

[0327] It should be noted that, after the terminal receives the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service, the terminal prioritizes cell reselection based on the cell reselection information associated with the activated multicast service, which means that the terminal may first perform cell reselection based on the cell reselection information associated with the activated multicast service when performing cell reselection, but if a cell meeting the cell reselection conditions cannot be determined, then perform cell reselection based on the cell reselection information associated with the inactivated multicast service; or, the terminal prioritizes cell reselection based on the cell reselection information associated with the activated multicast service, which means that when performing cell reselection, the terminal only performs cell reselection based on the cell reselection information associated with the activated multicast service, and does not perform cell reselection based on the cell reselection information associated with the inactivated multicast service.

[0328] In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to preferentially perform cell reselection according to the cell reselection information associated with the multicast service carried in the broadcast signaling.

[0329] For example, the network device only sends the cell reselection information associated with the multicast service to the terminal through broadcast signaling, and the terminal can perform cell reselection according to the cell reselection information associated with the multicast service carried in the broadcast signaling.

[0330] For example, the network device only sends the cell reselection information associated with the multicast service to the terminal through dedicated signaling, and the terminal can perform cell reselection according to the cell reselection information associated with the multicast service carried in the dedicated signaling.

[0331] For example, the network device sends cell reselection information associated with the multicast service to the terminal through broadcast signaling, and sends cell reselection information associated with the multicast service to the terminal through proprietary signaling. The terminal can preferentially reselect the cell based on the cell reselection information associated with the multicast service carried in the broadcast signaling.

[0332] For example, the terminal preferentially performs cell reselection based on the cell reselection information associated with the multicast service carried in the broadcast signaling. For example, the cell reselection information associated with the multicast service carried in the broadcast signaling has a higher priority than the cell reselection information associated with the multicast service carried in the proprietary signaling.

[0333] For example, the cell reselection information associated with the multicast service carried by the broadcast signaling is the cell reselection information associated with the multicast service TMGI#1, and the cell reselection information associated with the multicast service carried by the dedicated signaling is the cell reselection information associated with the multicast service TMGI#2. The terminal can preferentially perform cell reselection based on the cell reselection information associated with TMGI#1 carried by the broadcast signaling.

[0334] It should be noted that, when the network device sends the cell reselection information associated with the multicast service to the terminal through broadcast signaling, and sends the cell reselection information associated with the multicast service to the terminal through proprietary signaling, the terminal prioritizes cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling, which means that the terminal may first perform cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling when performing cell reselection, but if a cell meeting the cell reselection conditions is not determined, then perform cell reselection based on the cell reselection information associated with the multicast service carried by the proprietary signaling; or, the terminal prioritizes cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling, which means that when performing cell reselection, the terminal only performs cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling, and does not perform cell reselection based on the cell reselection information associated with the multicast service carried by the proprietary signaling.

[0335] In some embodiments, the network device sends cell reselection information associated with the multicast service to the terminal through broadcast signaling, and sends cell reselection information associated with the multicast service to the terminal through proprietary signaling. The terminal can perform cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling and the cell reselection information associated with the multicast service sent to the terminal by proprietary signaling.

[0336] For example, broadcast signaling and proprietary signaling send cell reselection information associated with a multicast service to the terminal, wherein, if the broadcast signaling and proprietary signaling both carry associated cell reselection information for the same multicast service, the terminal performs cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling. If the cell reselection information associated with the multicast service provided in the proprietary signaling is not carried by the broadcast signaling, the terminal may perform cell reselection based on the cell reselection information associated with the multicast service carried by the broadcast signaling and the cell reselection information associated with the multicast service carried by the proprietary signaling. The cell reselection information associated with the multicast service may include cell reselection information associated with an activated multicast service and / or cell reselection information associated with an inactivated multicast service.

[0337] For example, the network device sends identification information of the multicast service to the terminal through broadcast signaling, and sends frequency information and frequency priority information associated with the multicast service to the terminal through proprietary signaling. The terminal can reselect the cell based on the cell reselection information associated with the multicast service carried by the broadcast signaling and the cell reselection information associated with the multicast service sent to the terminal by proprietary signaling.

[0338] For example, the network device may send frequency information and frequency priority information associated with the multicast service to the terminal through broadcast signaling, and send identification information of the multicast service to the terminal through proprietary signaling. The terminal may reselect a cell based on the cell reselection information associated with the multicast service carried in the broadcast signaling and the cell reselection information associated with the multicast service sent to the terminal through proprietary signaling.

[0339] In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to preferentially reselect the cell according to the cell reselection information associated with the multicast service carried in the broadcast signaling, and preferentially reselect the cell according to the cell reselection information associated with the activated multicast service.

[0340] For example, the cell reselection information associated with the multicast service carried by the broadcast signaling includes the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service. Since the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service, the terminal can give priority to the cell reselection information associated with the activated multicast service carried by the broadcast signaling.

[0341] For example, the cell reselection information associated with multicast services carried in broadcast signaling includes cell reselection information associated with inactivated multicast services, while the cell reselection information associated with multicast services carried in proprietary signaling includes cell reselection information associated with activated multicast services. Because the priority of cell reselection information associated with activated multicast services is higher than the priority of cell reselection information associated with inactivated multicast services, the priority of cell reselection information associated with multicast services carried in broadcast signaling is higher than the priority of cell reselection information associated with multicast services carried in proprietary signaling.

[0342] In this case, the terminal may determine, based on implementation, the priority relationship between the cell reselection information associated with the inactivated multicast service carried in the broadcast signaling and the cell reselection information associated with the activated multicast service carried in the dedicated signaling.

[0343] For example, it can be determined that the priority of the cell reselection information associated with the activated multicast service carried by the proprietary signaling is higher than the priority of the cell reselection information associated with the inactivated multicast service carried by the broadcast signaling. The terminal can prioritize cell reselection based on the cell reselection information associated with the activated multicast service carried by the proprietary signaling.

[0344] For example, it can be determined that the priority of the cell reselection information associated with the inactivated multicast service carried by the broadcast signaling is higher than the priority of the cell reselection information associated with the activated multicast service carried by the proprietary signaling. The terminal can perform cell reselection based on the cell reselection information associated with the inactivated multicast service carried by the broadcast signaling.

[0345] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0346] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0347] In some embodiments, the terms "component carrier (CC)", "cell", "frequency carrier", "carrier frequency" and the like can be used interchangeably.

[0348] In some embodiments, "obtain", "get", "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 higher layers, obtaining by self-processing, autonomous implementation, etc.

[0349] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0350] An embodiment of the present disclosure also proposes a terminal, comprising: one or more processors; a memory coupled to the processor, wherein the memory stores executable instructions, and when the executable instructions are executed by the processor, the terminal executes the cell reselection method described in the first aspect and the optional embodiment of the first aspect.

[0351] FIG5 is a schematic block diagram of a cell reselection device according to an embodiment of the present disclosure. For example, the cell reselection device may be provided in a terminal. As shown in FIG5 , the cell reselection device includes a processing module 501.

[0352] In some embodiments, the processing module is configured to perform cell reselection according to cell reselection information associated with the multicast service, wherein the cell reselection information associated with the multicast service is sent by the network device to the terminal.

[0353] In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to preferentially reselect to a cell that supports the activated multicast service.

[0354] In some embodiments, the cell reselection information associated with the multicast service includes at least one of the following: identification information of the multicast service; frequency information associated with the multicast service; and frequency priority information associated with the multicast service.

[0355] In some embodiments, the multicast service includes at least one of the following:

[0356] a first multicast service, wherein the first multicast service has been activated;

[0357] A second multicast service, wherein the second multicast service is not activated.

[0358] In some embodiments, the cell reselection information associated with the multicast service includes at least one of the following:

[0359] Cell reselection information associated with the multicast service of the current serving node;

[0360] Cell reselection information associated with the multicast service of the neighboring node.

[0361] In some embodiments, the processing module is configured to perform cell reselection according to cell reselection information associated with the activated multicast service.

[0362] In some embodiments, the processing module is used to perform cell reselection based on cell reselection information associated with an activated multicast service and cell reselection information associated with an inactivated multicast service, wherein the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service.

[0363] In some embodiments, when the terminal meets a first condition, the cell reselection information associated with the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the cell reselection information associated with the multicast service; a change in the session status of the multicast service.

[0364] In some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following: being in a non-connected state; joining a session of a multicast service; supporting reception of non-connected multicast services; and supporting cell reselection based on cell reselection information associated with the multicast service.

[0365] In some embodiments, the cell reselection apparatus further includes: a transceiver module configured to send capability information to the network device, wherein the capability information is used to indicate whether the terminal supports cell reselection according to the cell reselection information associated with the multicast service.

[0366] In some embodiments, the capability information is used to indicate at least one of the following:

[0367] whether the terminal supports cell reselection based on cell reselection information associated with the multicast service carried in the broadcast signaling;

[0368] Whether the terminal supports cell reselection according to cell reselection information associated with the multicast service carried in the dedicated signaling.

[0369] In some embodiments, the cell reselection information associated with the multicast service is sent via at least one of the following: broadcast signaling; proprietary signaling.

[0370] In some embodiments, the terminal preferentially performs cell reselection based on cell reselection information associated with the multicast service carried in the broadcast signaling.

[0371] It should be noted that the modules included in the terminal may not be limited to the processing module and the sending module exemplified in the above embodiments, and may also include other modules such as a storage module and a display module.

[0372] An embodiment of the present disclosure also proposes a network device, comprising: one or more processors; a memory coupled to the processor, wherein the memory stores executable instructions, and when the executable instructions are executed by the processor, the network device executes the cell reselection method described in the above-mentioned second aspect and the optional embodiment of the second aspect.

[0373] FIG6 is a schematic block diagram of a cell reselection device according to an embodiment of the present disclosure. For example, the cell reselection device can be provided in a network device. As shown in FIG6 , the network device includes a transceiver module 601.

[0374] In some embodiments, the transceiver module is used to send cell reselection information associated with a multicast service to the terminal, wherein the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection.

[0375] In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to preferentially reselect to a cell that supports the activated multicast service.

[0376] In some embodiments, the cell reselection information associated with the multicast service includes at least one of the following: identification information of the multicast service; frequency information associated with the multicast service; and frequency priority information associated with the multicast service.

[0377] In some embodiments, the multicast service includes at least one of the following:

[0378] a first multicast service, wherein the first multicast service has been activated;

[0379] A second multicast service, wherein the second multicast service is not activated.

[0380] In some embodiments, the cell reselection information associated with the multicast service includes at least one of the following:

[0381] Cell reselection information associated with the multicast service of the current serving node;

[0382] Cell reselection information associated with the multicast service of the neighboring node.

[0383] In some embodiments, the cell reselection information associated with the multicast service of the neighboring node is sent to the network device based on at least one of the following methods:

[0384] The neighboring node sends the data to the network device through the inter-node interface;

[0385] Sent by the operation, maintenance and management equipment to the network equipment.

[0386] In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection according to the cell reselection information associated with the activated multicast service.

[0387] In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection based on the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service, wherein the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service.

[0388] In some embodiments, when the terminal meets a first condition, the cell reselection information associated with the multicast service becomes invalid, wherein the first condition includes at least one of the following: a first timeout; a change in the cell reselection information associated with the multicast service; a change in the session status of the multicast service.

[0389] In some embodiments, the terminal satisfies a second condition, wherein the second condition includes at least one of the following: being in a non-connected state; joining a session of a multicast service; supporting reception of non-connected multicast services; and supporting cell reselection based on cell reselection information associated with the multicast service.

[0390] In some embodiments, the transceiver module is further configured to receive capability information sent by the terminal, wherein the capability information is used to indicate whether the terminal supports cell reselection according to the cell reselection information associated with the multicast service.

[0391] In some embodiments, the capability information is used to indicate at least one of the following:

[0392] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the broadcast signaling;

[0393] Whether the terminal supports cell reselection based on the cell reselection information associated with the multicast service carried in the dedicated signaling.

[0394] In some embodiments, the cell reselection information associated with the multicast service is sent via at least one of the following: broadcast signaling; proprietary signaling.

[0395] In some embodiments, the cell reselection information associated with the multicast service is used by the terminal to preferentially perform cell reselection according to the cell reselection information associated with the multicast service carried in broadcast signaling.

[0396] It should be noted that the modules included in the network device may not be limited to the sending module and receiving module exemplified in the above embodiments, and may also include other modules such as a processing module and a storage module.

[0397] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can be referred to the partial description of the method embodiment. The device embodiment described above is merely illustrative, 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 can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art can understand and implement it without paying any creative work.

[0398] 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 the cell reselection method described in any one of the first aspect, the second aspect, the optional embodiment of the first aspect, and the optional embodiment of the second aspect.

[0399] 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.

[0400] An embodiment of the present disclosure also proposes a storage medium storing instructions. When the instructions are executed on a communication device, the communication device executes the cell reselection method described in the first aspect, the second aspect, the optional embodiment of the first aspect, and the optional embodiment of the second aspect.

[0401] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0402] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may 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 the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various 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 within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the remaining part by the form of hardware circuits.

[0403] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, 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 a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement 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.

[0404] Figure 7 is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. Communication device 7100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user equipment, etc.), 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. Communication device 7100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0405] As shown in Figure 7, the communication device 7100 includes one or more processors 7101. The processor 7101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can 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 programs, and process program data. The processor 7101 is used to call instructions to enable the communication device 7100 to perform any of the above methods.

[0406] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may be located outside the communication device 7100.

[0407] 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 transmitting and receiving in the above method are performed by the transceiver 7103, and the other steps are performed by the processor 7101.

[0408] In some embodiments, a transceiver may include a receiver and a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0409] Optionally, the communication device 7100 further includes one or more interface circuits 7104, which are connected to the memory 7102. The interface circuits 7104 may be configured to receive signals from the memory 7102 or other devices, and may be configured to send signals to the memory 7102 or other devices. For example, the interface circuits 7104 may read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0410] 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 or 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, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0411] FIG8 is a schematic diagram of the structure of a chip 8200 according to an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 8200 shown in FIG8 , but the present disclosure is not limited thereto.

[0412] 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.

[0413] In some embodiments, the chip 8200 further includes one or more interface circuits 8202, which are connected to the memory 8203. The interface circuit 8202 can be used to receive signals from the memory 8203 or other devices, and can be used to send signals to the memory.

[0414] 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 interface circuit, interface, transceiver pin, transceiver, etc. can be used interchangeably.

[0415] In some embodiments, the chip 8200 further includes one or more memories 8203 for storing instructions. Alternatively, all or part of the memories 8203 may be outside the chip 8200.

[0416] The present disclosure also proposes a storage medium having instructions stored thereon. 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 thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0417] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0418] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A cell reselection method, characterized in that: Executed by a terminal, the method includes: The cell reselection is performed according to the cell reselection information associated with the multicast service, wherein the cell reselection information associated with the multicast service is sent to the terminal by a network device.

2. The method according to claim 1, characterized in that: The cell reselection information associated with the multicast service is used by the terminal to preferentially reselect a cell that supports the activated multicast service.

3. The method according to claim 1 or 2, characterized in that: The cell reselection information associated with the multicast service includes at least one of the following: Identification information of the multicast service; Frequency information associated with multicast services; Frequency priority information associated with multicast services.

4. The method according to any one of claims 1 to 3, characterized in that The multicast service includes at least one of the following: A first multicast service, wherein the first multicast service has been activated; A second multicast service, wherein the second multicast service is not activated.

5. The method according to any one of claims 1 to 4, characterized in that The cell reselection information associated with the multicast service includes at least one of the following: Cell reselection information associated with the multicast service of the current serving node; Cell reselection information associated with the multicast service of the neighboring node.

6. The method according to any one of claims 1 to 5, characterized in that The performing cell reselection according to the cell reselection information associated with the multicast service includes: The cell reselection is performed according to the cell reselection information associated with the activated multicast service.

7. The method according to any one of claims 1 to 5, characterized in that The performing cell reselection according to the cell reselection information associated with the multicast service includes: Cell reselection is performed according to cell reselection information associated with the activated multicast service and cell reselection information associated with the inactivated multicast service, wherein the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service.

8. The method according to any one of claims 1 to 7, characterized in that When the terminal meets a first condition, the cell reselection information associated with the multicast service becomes invalid, wherein the first condition includes at least one of the following: First time out; Change of cell reselection information associated with the multicast service; The session state of the multicast service changes.

9. The method according to any one of claims 1 to 8, characterized in that The terminal satisfies a second condition, wherein the second condition includes at least one of the following: In a disconnected state; A session that has joined the multicast service; Support receiving non-connection multicast services; Supporting cell reselection according to the cell reselection information associated with the multicast service.

10. The method according to any one of claims 1 to 9, characterized in that The method further comprises: Sending capability information to the network device, wherein the capability information is used to indicate whether the terminal supports cell reselection according to the cell reselection information associated with the multicast service.

11. The method according to claim 10, characterized in that The capability information is used to indicate at least one of the following: whether the terminal supports cell reselection according to cell reselection information associated with the multicast service carried in the broadcast signaling; Whether the terminal supports cell reselection according to cell reselection information associated with the multicast service carried in the dedicated signaling.

12. The method according to any one of claims 1 to 11, characterized in that The cell reselection information associated with the multicast service is sent by at least one of the following: Broadcast signaling; Proprietary signaling.

13. The method according to claim 12, characterized in that The terminal preferentially performs cell reselection according to the cell reselection information associated with the multicast service carried in the broadcast signaling.

14. A cell reselection method, characterized in that: Executed by a network device, the method includes: The cell reselection information associated with the multicast service is sent to the terminal, wherein the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection.

15. The method according to claim 14, characterized in that The cell reselection information associated with the multicast service is used by the terminal to preferentially reselect a cell that supports the activated multicast service.

16. The method according to claim 14 or 15, characterized in that The cell reselection information associated with the multicast service includes at least one of the following: Identification information of the multicast service; Frequency information associated with multicast services; Frequency priority information associated with multicast services.

17. The method according to any one of claims 14 to 16, characterized in that The multicast service includes at least one of the following: A first multicast service, wherein the first multicast service has been activated; A second multicast service, wherein the second multicast service is not activated.

18. The method according to any one of claims 14 to 17, characterized in that The cell reselection information associated with the multicast service includes at least one of the following: Cell reselection information associated with the multicast service of the current serving node; Cell reselection information associated with the multicast service of the neighboring node.

19. The method according to claim 18, characterized in that The cell reselection information associated with the multicast service of the neighboring node is sent to the network device based on at least one of the following methods: The neighboring node sends the information to the network device through the inter-node interface; Sent by the operation, maintenance and management device to the network device.

20. The method according to any one of claims 14 to 19, characterized in that The cell reselection information associated with the multicast service is used by the terminal to perform cell reselection according to the cell reselection information associated with the activated multicast service.

21. The method according to any one of claims 14 to 19, characterized in that The cell reselection information associated with the multicast service is used by the terminal to perform cell reselection based on the cell reselection information associated with the activated multicast service and the cell reselection information associated with the inactivated multicast service, wherein the priority of the cell reselection information associated with the activated multicast service is higher than the priority of the cell reselection information associated with the inactivated multicast service.

22. The method according to any one of claims 14 to 21, characterized in that When the terminal meets a first condition, the cell reselection information associated with the multicast service becomes invalid, wherein the first condition includes at least one of the following: First time out; Change of cell reselection information associated with the multicast service; The session state of the multicast service changes.

23. The method according to any one of claims 14 to 22, characterized in that The terminal satisfies a second condition, wherein the second condition includes at least one of the following: In a disconnected state; A session that has joined the multicast service; Support receiving non-connection multicast services; Supporting cell reselection according to the cell reselection information associated with the multicast service.

24. The method according to any one of claims 14 to 23, characterized in that The method further comprises: receiving capability information sent by the terminal, wherein the capability information is used to indicate whether the terminal supports cell reselection according to the cell reselection information associated with the multicast service.

25. The method according to claim 24, characterized in that The capability information is used to indicate at least one of the following: whether the terminal supports cell reselection according to cell reselection information associated with the multicast service carried in the broadcast signaling; Whether the terminal supports cell reselection according to cell reselection information associated with the multicast service carried in the dedicated signaling.

26. The method according to any one of claims 14 to 25, characterized in that The cell reselection information associated with the multicast service is sent by at least one of the following: Broadcast signaling; Proprietary signaling.

27. The method according to claim 26, characterized in that The cell reselection information associated with the multicast service is used by the terminal to preferentially perform cell reselection according to the cell reselection information associated with the multicast service carried in the broadcast signaling.

28. A terminal, characterized in that: include: one or more processors; A memory coupled to the processor, wherein the memory stores executable instructions, and when the executable instructions are executed by the processor, the terminal executes the cell reselection method according to any one of claims 1 to 13.

29. A network device, characterized in that: include: one or more processors; A memory coupled to the processor, wherein executable instructions are stored in the memory, and when the executable instructions are executed by the processor, the network device executes the cell reselection method according to any one of claims 14 to 27.

30. A cell reselection device, characterized in that: The device comprises: The processing module is used to perform cell reselection according to the cell reselection information associated with the multicast service, wherein the cell reselection information associated with the multicast service is sent by the network device to the terminal.

31. A cell reselection device, characterized in that: The device comprises: The transceiver module is used to send cell reselection information associated with the multicast service to the terminal, wherein the cell reselection information associated with the multicast service is used by the terminal to perform cell reselection.

32. A communication device, characterized in that: include: one or more processors; The processor is used to call instructions to enable the communication device to execute the cell reselection method according to any one of claims 1-13 and 14-27.

33. A communication system, characterized in that: The invention comprises a terminal and a network device, wherein the terminal is configured to implement the cell reselection method according to any one of claims 1 to 13, and the network device is configured to implement the cell reselection method according to any one of claims 14 to 27.

34. A storage medium storing instructions, characterized in that: When the instruction is executed on a communication device, the communication device is enabled to execute the cell reselection method according to any one of claims 1-13 and 14-27.

Images