WO2023125211A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2023125211A1
WO2023125211A1 PCT/CN2022/140808 CN2022140808W WO2023125211A1 WO 2023125211 A1 WO2023125211 A1 WO 2023125211A1 CN 2022140808 W CN2022140808 W CN 2022140808W WO 2023125211 A1 WO2023125211 A1 WO 2023125211A1
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Prior art keywords
mbs session
receiving end
session
mbs
reference information
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PCT/CN2022/140808
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English (en)
French (fr)
Inventor
许胜锋
李濛
杨艳梅
Original Assignee
华为技术有限公司
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Priority claimed from CN202210239509.6A external-priority patent/CN116437301A/zh
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2023125211A1 publication Critical patent/WO2023125211A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and device.
  • mobile communication networks for example, the 5th generation (the 5th generation) , 5G) mobile communication network
  • multicast/broadcast service multicast broadcast service, MBS
  • the multicast/broadcast service can be transmitted in two ways: a protocol data unit (protocol data unit, PDU) session or an MBS session.
  • PDU protocol data unit
  • MBS MBS session
  • PDU session method different resources are established for different user equipment (UE) to transmit multicast/broadcast services, which seriously wastes network resources
  • UE user equipment
  • MBS session method the same resources are established for different UEs to transmit multicast/broadcast services , although the waste of network resources can be reduced, the problem of waste of network resources still exists. Therefore, how to reduce the waste of network resources of MBS becomes an urgent problem to be solved.
  • the present application provides a communication method and device to save network resources.
  • the present application provides a communication method, including:
  • the multicast/broadcast session management network element obtains the reference information of the first MBS session, and the reference information of the first MBS session is used to represent the characteristics of the first MBS session; sends the first MBS session to the session management network element or the access and mobility management network element Reference information of the MBS session: the session management network element or the access and mobility management network element sends the reference information of the first MBS session to the access network device, and accordingly, the access network device receives the first MBS session from the session management network element the reference information of the first MBS session; the access network device triggers the first receiver corresponding to the first MBS session to enter an idle state or a radio resource control (radio resource control, RRC) inactive state according to the reference information of the first MBS session.
  • RRC radio resource control
  • the characteristics of the first MBS session may be understood as performance, demand information, priority information, etc. of the first MBS session, which are not specifically limited in this application.
  • the first receiving end corresponding to the first MBS session can be understood as a terminal receiving service data through the first MBS session, that is, a terminal receiving service data of the first MBS session, and can also be understood as a terminal accessing the first MBS session.
  • the first receiving end may be one or more terminals, which is not specifically limited in this application.
  • the service data of the MBS session refers to the service data supported by the MBS session, or the service data transmitted through the MBS session, and the service data is MBS data.
  • the access network device triggers the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state according to the reference information of the first MBS session.
  • it may directly pass the reference information of the first MBS session , triggering the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state, or to perform data processing on the reference information of the first MBS session (for example, based on artificial intelligence (artificial intelligence, AI) for the first
  • AI artificial intelligence
  • the reference information of the MBS session is used for data analysis, etc.
  • the receiving end corresponding to the MBS session usually receives the service data of the MBS session in the RRC connection state.
  • Network access devices have a lot of processing resources. However, due to the limited capabilities of access network devices and limited processing resources (for example, limited processing power or limited storage space), access network devices cannot support the reception of a large number of MBS sessions.
  • the end is in the RRC connection state.
  • the access network device can trigger the receiving end corresponding to each MBS session to enter the idle state or the RRC inactive state according to the reference information of each MBS session, so as to avoid long-term occupation of the access network device.
  • the processing resources used to maintain the receiving end of the MBS session in the RRC connection state can further save the processing resources of the access network device.
  • the reference information of the first MBS session includes one or more of the following: the priority of the first MBS session, the reliability requirement of the first MBS session, the delay of the first MBS session, the The allocation and retention priority (ARP) of an MBS session is used to indicate that the receiver in the idle state or the RRC inactive state is allowed to receive the first indication information of the business data of the first MBS session, and is used to indicate the permission Second indication information that does not meet the quality of service (quality of service, QoS) requirement of the first MBS session.
  • ARP allocation and retention priority
  • the reliability requirement of the first MBS session can be the reliability requirement with the highest reliability requirement in the 5G QoS indicator (the 5th generation quality of service identifier, 5QI) of the QoS flow of the first MBS session;
  • the delay may be the lowest delay among the 5QIs of the QoS flow of the first MBS session;
  • the ARP of the first MBS session may be the lowest ARP among the ARPs of the QoS flow of the first MBS session.
  • the access network device can trigger the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state, which prevents the access network device from maintaining the receiving end in the RRC connection for a long time
  • the processing resource consumption of the state can further save the processing resources of the access network equipment.
  • the multicast/broadcast session management network element receives the MBS session establishment request, and the MBS session establishment request includes the reference information of the first MBS session; or, receives the first MBS session policy from the policy management network element Information, the first MBS session policy information includes the reference information of the first MBS session; or, receive the QoS information of the first MBS session from the application function or policy management network element, and determine the first MBS session according to the QoS information of the first MBS session Reference information for the session.
  • the way to obtain the reference information of the first MBS session can reuse the existing solution process (such as MBS session establishment request, MBS policy management, etc.) Reference information for an MBS session.
  • existing solution process such as MBS session establishment request, MBS policy management, etc.
  • the access network device when the reference information of the first MBS session includes the priority of the first MBS session, if the priority of the first MBS session is lower than the first preset priority, the access network device triggers The first receiver corresponding to the first MBS session enters the idle state or the RRC inactive state; or, if the priority of the first MBS session is the lowest among all MBS sessions of the access network device, the access network device triggers the first MBS session The first receiving end corresponding to an MBS session enters an idle state or an RRC inactive state.
  • all MBS sessions of the access network device involved in this application can be understood as: all MBS sessions currently provided by the access network device, or all MBS sessions established through the access network device.
  • the priority may be the priority of performance requirements, and/or the priority of quality requirements, etc., and the lower the priority, it may indicate that the business requirements of the MBS session are not high or less important. Therefore, this application accepts
  • the network access device triggers the first receiver corresponding to the MBS session with the lowest priority or a priority lower than the first preset priority among all MBS sessions of the access network device (that is, the first MBS session) to enter the idle state or RRC is inactive state, on the premise of guaranteeing the service data transmission of the high-priority MBS session first, and saving the processing resources of the access network equipment.
  • the first MBS session corresponding or, if the reliability requirement of the first MBS session is the lowest among all MBS sessions of the access network device trigger the first MBS session corresponding to the first MBS session.
  • the receiving end enters the idle state or the RRC inactive state.
  • the reliability requirement of the first MBS session is the lowest among all MBS sessions of the access network device (for example, all MBS sessions of the access network device include MBS session 1 and MBS session 2, and MBS session 1 corresponds to
  • the service of MBS1 is MBS1
  • the reliability requirement of MBS session 1 is 0.9
  • the corresponding service of MBS session 2 is MBS2, and the reliability requirement of MBS session 2 is 0.99.
  • the reliability requirement of MBS session 1 is low Reliability requirements of MBS session 2) or lower than the first threshold, indicating that the service demand of the first MBS session is not high or not very important, so this application triggers all MBS sessions of the access network device through the access network device.
  • the first receiving end corresponding to the MBS session whose reliability requirement is the lowest or whose reliability requirement is lower than the first threshold enters an idle state or an RRC inactive state. This mode not only ensures normal transmission of services requiring high reliability, but also saves processing resources of access network equipment.
  • the first MBS session corresponding to the first MBS session is triggered.
  • a receiving end enters an idle state or an RRC inactive state; or, if the delay of the first MBS session is the highest among all MBS sessions of the access network device, triggering the first receiving end corresponding to the first MBS session to enter the idle state state or RRC inactive state.
  • the delay of the first MBS session is the highest among all MBS sessions of the access network device (for example, all MBS sessions of the access network device include MBS session 1 and MBS session 2, and the service corresponding to MBS session 1 MBS1, and the delay of MBS session 1 is 5 milliseconds, the service corresponding to MBS session 2 is MBS2, and the delay of MBS session 2 is 10 milliseconds, since 5 ⁇ 10, the delay of MBS session 2 is higher than that of MBS session 1) or higher than the second threshold, which indicates that the service demand of the first MBS session is not high or not very important.
  • all MBS sessions of the access network device include MBS session 1 and MBS session 2, and the service corresponding to MBS session 1 MBS1, and the delay of MBS session 1 is 5 milliseconds, the service corresponding to MBS session 2 is MBS2, and the delay of MBS session 2 is 10 milliseconds, since 5 ⁇ 10, the delay of MBS session 2 is higher than that of MBS session 1) or higher than the second threshold, which
  • the present application triggers the delay of all MBS sessions of the access network device through the access network device with the highest or The first receiving end corresponding to the MBS session whose delay is higher than the second threshold enters the idle state or the RRC inactive state, which not only ensures the normal transmission of services with high delay requirements, but also saves the processing resources of the access network equipment.
  • the reference information of the first MBS session includes the ARP of the first MBS session
  • the ARP of the first MBS session is higher than the third threshold
  • the first reception corresponding to the first MBS session is triggered. or, if the ARP of the first MBS session is the highest among all MBS sessions of the access network device, triggering the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state. active state.
  • the ARP of the first MBS session is the lowest among all MBS sessions of the access network device (for example, all MBS sessions of the access network device include MBS session 1 and MBS session 2, and the service corresponding to MBS session 1 is MBS1 , and the ARP of MBS session 1 is 12, the service corresponding to MBS session 2 is MBS2, and the APR of MBS session 2 is 3.
  • the network access device triggers the first receiving end corresponding to the MBS session with the highest ARP or ARP higher than the third threshold among all MBS sessions of the access network device to enter the idle state or the RRC inactive state, which will not affect the execution of other services, and
  • the processing resource of the access network device can also be saved.
  • the first receiving end is one or more receiving ends corresponding to the first MBS session.
  • the above method further includes: the access network device determines that the first receiving end is not There is service data transmission other than the service data of the first MBS session, or the access network device determines that there is no service other than the service data of the first MBS session at the first receiving end. This can avoid affecting the normal transmission of other service data at the first receiving end.
  • the foregoing method further includes: the access network device receiving the reference information from the first receiving end of the session management network element.
  • the reference information of the first receiving end of the session management network element may come from the multicast/broadcast session management network element, and may also come from the unified data management network element.
  • the reference information of the first receiving end may include one or more of the following: the priority of the first receiving end in the first MBS session, used to indicate that the first receiving end is allowed to receive the first The third indication information of the business data of the MBS session; the above-mentioned access network device triggers the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state, including: the access network device triggers according to the reference information of the first receiving end The first receiving end enters an idle state or an RRC inactive state.
  • this application further triggers the first receiving terminal based on the reference information of the first receiving terminal. Once the receiving end enters the idle state or the RRC inactive state, it can ensure that the high-priority receiving end normally receives the service data of the first MBS session.
  • the MBS session establishment request carries reference information of the first receiving end, or, the first MBS session policy information includes reference information of the first receiving end.
  • the access network device when the reference information of the first receiving end includes the priority of the first receiving end in the first MBS session, if the priority of the first receiving end in the first MBS session is lower than that of the second Preset priority, then the access network device triggers the first receiving end to enter the idle state or RRC inactive state; or, if the priority of the first receiving end in the first MBS session is higher than that of all receiving ends corresponding to the first MBS session is the lowest, the access network device triggers the first receiving end to enter the idle state or the RRC inactive state.
  • all receiving terminals corresponding to the first MBS session can be understood as: all terminals receiving service data through the first MBS session of the access network device, that is, receiving service data of the first MBS session of the access network device. All terminals can also be understood as all terminals accessing the first MBS session through the access network device, and the all terminals can refer to all terminals currently receiving service data through the first MBS session of the access network device.
  • the priority of the first MBS session triggered by the access network device is the lowest or the priority is lower than the second preset priority.
  • the first receiving end of the level enters the idle state or the RRC inactive state, which will not only not affect the service execution of other terminals in the receiving end corresponding to the first MBS session, but also save the processing resources of the access network equipment.
  • the multicast/broadcast session management network element may receive the identification information of the first receiver from the session management network element; the multicast/broadcast The session management network element sends the reference information of the first receiving end to the session management network element according to the identification information. In this way, the reference information of the actually participating receivers is sent on demand, avoiding sending the reference information of all the receivers of the first MBS session to the session management network element, which can save processing and transmission resources.
  • the access network device determines that it is in the RRC The number of terminals in the connected state and receiving the service data of the MBS session is higher than a preset value; or, the access network device determines that the number of terminals in the RRC connected state is higher than the preset value.
  • the receiving end will be triggered to enter the idle state or the RRC inactive state; when the access network device is not congested or under light load (access When the number of terminals is small), all receivers can be supported to receive service data of the MBS session in the RRC connection state, so as to better meet the service transmission performance of the MBS session.
  • the access network device does not receive To the fourth indication information, the fourth indication information is used to indicate that the first receiving end is not allowed to receive the service data of the first MBS session in the idle state or the RRC inactive state, or indicates that the first receiving end provides a relay for the first MBS session Serve. In this manner, priority is given to ensuring that the relay terminal normally receives the service data of the first MBS session, so that the relay terminal can normally send the service data of the first MBS session to the remote terminal.
  • the present application provides a communication method, including: a multicast/broadcast session management network element acquires reference information of a first receiving end of a first MBS session, and the reference information of the first receiving end is used to indicate characteristics of the first receiving end; Send the reference information of the first receiving end to the session management network element. Further, the session management network element sends the reference information of the first receiving end to the access network device, and the reference information of the first receiving end is used by the access network device to trigger the first receiving end to enter an idle state or an RRC inactive state.
  • this application further triggers the first receiving terminal based on the reference information of the first receiving terminal. Once the receiving end enters the idle state or the RRC inactive state, it can ensure that the high-priority receiving end normally receives the service data of the first MBS session.
  • the reference information of the first receiving end includes one or more of the following: the priority of the first receiving end in the first MBS session, indicating that the first receiving end is allowed to be in an idle state or RRC
  • the third indication information of the service data of the first MBS session is received in an inactive state.
  • the multicast/broadcast session management network element receives the MBS session establishment request, and the MBS session establishment request includes the reference information of the first receiving end of the first MBS session; or, receives the first MBS session establishment request from the policy management network element - MBS session policy information, the first MBS session policy information includes reference information of the first receiving end.
  • the above method further includes: the multicast/broadcast session management network element receives the The identification information of the first receiving end; the multicast/broadcast session management network element sends the reference information of the first receiving end to the session management network element according to the identification information.
  • the access network device when the reference information of the first receiving end includes the priority of the first receiving end in the first MBS session, if the priority of the first receiving end in the first MBS session is lower than that of the second Preset priority, then the access network device triggers the first receiving end to enter the idle state or RRC inactive state; or, if the priority of the first receiving end in the first MBS session is among all receiving ends in the first MBS session If the priority is the lowest, the access network device triggers the first receiving end to enter an idle state or an RRC inactive state.
  • the access network device determines that there is no service other than the service data of the first MBS session at the first receiving end. data transmission.
  • the access network device determines that it is in the RRC connected state and receives The number of terminals for service data of the MBS session is higher than a preset value; or, the access network device determines that the number of terminals in an RRC connection state is higher than a preset value.
  • the present application provides a communication method, including:
  • the session management network element determines that the terminal provides relay services for the first MBS session; the session management network element sends indication information to the access network device, and the indication information is used to indicate that the terminal is not allowed to receive the first MBS session in the idle state or the RRC inactive state service data, or indicates that the terminal provides a relay service for the first MBS session.
  • the access network device receives the indication information from the session management network element; the access network device can determine that the terminal is not in the idle state or the RRC inactive state to receive the service data of the MBS session according to the indication information.
  • the reliability of receiving the MBS session by the relay terminal is given priority, so that the relay terminal can send correct MBS session service data to the remote terminal, and avoid the relay terminal from sending wrong MBS session service data to the remote terminal.
  • the session management network element may receive service indication information, and the service indication information indicates that the terminal provides relay services for the first MBS session; or, according to the received terminal report, determine that the terminal is the first MBS session Sessions provide relay services.
  • the session management network element can reuse the existing solution flow and learn that the terminal provides the relay service for the first MBS session.
  • the embodiment of the present application provides a communication device
  • the communication device may be an access network device (such as the access network device in the first aspect, the access network device in the second aspect, or the access network device in the third aspect) access network device) or a chip set inside the access network device, and can also manage network elements for multicast/broadcast sessions (such as the multicast/broadcast session management network element in the first aspect, and the multicast/broadcast session management network element in the second aspect) broadcast/broadcast session management network element, the multicast/broadcast session management network element in the third aspect) or a chip arranged inside the multicast/broadcast session management network element, can also be a session management network element (such as in the first aspect session management network element, session management network element in the second aspect, session management network element in the third aspect) or a chip arranged inside the session management network element.
  • the communication device may be an access network device (such as the access network device in the first aspect, the access network device in the second aspect, or the access network device in the
  • the communication device has the function of realizing any one of the first to third aspects above, for example, the communication device includes a module or unit corresponding to the steps involved in any one of the first to third aspects above or Means, the function or unit or means may be implemented by software, or by hardware, or by executing corresponding software by hardware.
  • the communication device includes a processing unit and a transceiver unit, wherein the transceiver unit can be used to send and receive signals to realize communication between the communication device and other devices, for example, the transceiver unit is used to receive signals from Configuration information of the terminal device; the processing unit can be used to perform some internal operations of the communication device.
  • the transceiver unit may be called an input-output unit, a communication unit, etc., and the transceiver unit may be a transceiver; the processing unit may be a processor.
  • the transceiver unit may be an input-output interface, an input-output circuit, or an input-output pin, etc., and may also be called an interface, a communication interface, or an interface circuit;
  • the processing unit may be a processor, a processing circuit, or a logic circuit.
  • the communication device includes a processor, and may further include a transceiver, the transceiver is used to send and receive signals, and the processor executes program instructions to complete the first aspect to the third aspect above.
  • the communication device may further include one or more memories, the memories are used to be coupled with the processor, and the memories may store necessary computer programs for realizing the functions involved in any one of the first to third aspects above or instructions.
  • the processor may execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device may implement any of the possible designs or implementations of the first aspect to the third aspect above. method.
  • the communication device includes a processor, and the processor can be used to be coupled with the memory.
  • the memory may store necessary computer programs or instructions for realizing the functions involved in any one of the first to third aspects above.
  • the processor may execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device may realize any of the possible designs or implementations of the first aspect to the third aspect above. method.
  • the communication device includes a processor and an interface circuit, where the processor is used to communicate with other devices through the interface circuit, and execute any possible design or method in the implementation.
  • the processor can be implemented by hardware or by software.
  • the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • there may be one or more processors, and one or more memories.
  • the memory can be integrated with the processor, or the memory can be separated from the processor.
  • the memory and the processor can be integrated on the same chip, or they can be respectively arranged on different chips.
  • the embodiment of the present application does not limit the type of the memory and the arrangement of the memory and the processor.
  • an embodiment of the present application provides a communication system, which includes the access network device, the multicast/broadcast session management network element, and the session management network element in the above first to third aspects.
  • the present application provides a system-on-a-chip, which includes a processor and may further include a memory, configured to implement the method described in any one of the possible designs from the first aspect to the third aspect above.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the present application also provides a computer-readable storage medium, in which computer-readable instructions are stored, and when the computer-readable instructions are run on a computer, the computer executes the first to second aspects. Any one of three possible design methods.
  • the present application provides a computer program product including instructions, which, when run on a computer, cause the computer to execute the methods of the above-mentioned embodiments from the first aspect to the third aspect.
  • Fig. 1 shows a schematic diagram of a communication system
  • FIG. 2 shows a schematic flowchart of a communication method provided by an embodiment of the present application
  • FIG. 3 shows a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 4 shows a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 5 shows a schematic flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 6 shows a schematic flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 7 shows a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 8 shows a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 9 shows a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • Figure 1 shows a schematic diagram of a mobile communication network architecture, which includes terminals, access network equipment, access and mobility management functions, session management functions, user plane functions, policy control functions, network slice selection functions, Network slice-specific authentication and authorization functions, network warehouse functions, network data analysis functions, unified data management functions, unified data storage functions, authentication service functions, network capability exposure functions, terminal wireless capability management functions, binding support functions, and application functions , and the data network (data network, DN) connected to the operator network.
  • the terminal can access the wireless network through the access node at the current location.
  • the terminal can send service data to the data network and receive service data from the data network through access network equipment and user plane functions.
  • Access and mobility management functions are mainly used for terminal attachment, mobility management, and tracking area update procedures in the mobile network.
  • the access and mobility management function can be the access and mobility management function (access and mobility management function, AMF).
  • AMF access and mobility management function
  • the access and mobility management function It may still be AMF, or may have another name, which is not limited by the present application.
  • the session management function is mainly used for session management in mobile networks. Specific functions include assigning Internet protocol addresses to terminals, selecting user plane functions that provide message forwarding functions, and so on.
  • the session management function may be a session management function network element (session management function, SMF).
  • SMF session management function network element
  • the session management function may still be an SMF, or may have other functions.
  • the name is not limited in this application.
  • the SMF can be used to create a unicast session or a PDU session, and is mainly used for establishing, modifying, and releasing a unicast session or a PDU session.
  • This application also involves a multicast/broadcast session management network element, which can be a multicast/broadcast-session management function (MB-SMF), mainly used for mobile MBS session management in the network, such as the establishment, modification and release of MBS sessions.
  • M-SMF multicast/broadcast-session management function
  • the user plane function is mainly used to process user packets, such as forwarding and charging.
  • the user plane function may be a user plane function (UPF), and in a future communication system (such as a 6G communication system), the user plane function may still be UPF, or may have other names, This application is not limiting.
  • Policy control function including policy control function, charging policy control function, QoS control, etc.
  • the policy control function may be a policy control function (policy control function, PCF), and in a future communication system (such as a 6G communication system), the policy control function may still be a PCF, or may have other names, This application is not limiting.
  • the network slice selection function is mainly used to select an appropriate network slice for terminal services.
  • the network slice selection function can be a network slice selection function (network slice selection function, NSSF).
  • NSSF network slice selection function
  • the network slice selection function can still be NSSF, or it can also be There are other names, which are not limited by this application.
  • the network slice-specific authentication and authorization function (network slice-specific authentication and authorization function, NSSAAF) is mainly used for the verification and authorization of terminal access to a specific network slice.
  • the network warehouse function is mainly used to provide registration and discovery of network functions or services provided by network functions.
  • the network repository function may be a network repository function (network repository function, NRF).
  • NRF network repository function
  • the network repository function may still be NRF, or may have other names, This application is not limiting.
  • the network data analysis function can collect data from various network functions, such as policy control functions, session management functions, user plane functions, access management functions, and application functions (through the network capability exposure function), and perform analysis and prediction.
  • the network data analysis function can be a network data analysis function (network data analytics function, NWDAF).
  • NWDAF network data analytics function
  • the network data analysis function can still be NWDAF, or it can also be There are other names, which are not limited by this application.
  • the unified data management function is mainly used to manage the contract information of the terminal.
  • the unified data management function may be a unified data management (unified data management, UDM) function.
  • UDM unified data management
  • the unified data management function may still be a UDM function, or it may also be There are other names, which are not limited by this application.
  • the unified data storage function is mainly used to store structured data information, including contract information, policy information, and network data or business data defined in a standard format.
  • the unified data storage function may be a unified data repository (UDR) function, and in a future communication system (such as a 6G communication system), the unified data storage function may still be a UDR function, or may also be There are other names, which are not limited by this application.
  • the authentication service function is mainly used to perform security authentication on the terminal.
  • the authentication service function may be an authentication server function (authentication server function, AUSF), and in a future communication system (such as a 6G communication system), the authentication service function may still be AUSF, or may have other names , this application is not limited.
  • the network capability exposure function can expose some functions of the network to applications in a controlled manner.
  • the network capability exposure function may be a network exposure function (network exposure function, NEF).
  • NEF network exposure function
  • the network capability exposure function may still be a NEF, or may also have Other titles are not limited in this application.
  • the terminal wireless capability management function is used to store and manage the wireless capabilities of terminals in the network.
  • the terminal radio capability management function can be the terminal radio capability management function (user equipment radio capability management function, UCMF).
  • UCMF user equipment radio capability management function
  • future communication systems such as 6G communication systems
  • the terminal radio capability management function can still be UCMF, or may have other names, is not limited by this application.
  • the binding support function is used to maintain the correspondence between the protocol (internet protocol, IP) addresses and service functions interconnected between user networks.
  • the binding support function may be a binding support function (binding support function, BSF).
  • BSF binding support function
  • the binding support function may still be a BSF, or may also have Other titles are not limited in this application.
  • the application function can provide service data of various applications to the control plane function of the operator's communication network, or obtain network data information and control information from the control plane function of the communication network.
  • the application function may be an application function (Application Function, AF).
  • AF Application Function
  • the application function may still be AF, or may have other names. This application does not limited.
  • the data network is mainly used to provide data transmission services for terminals.
  • the data network can be a private network, such as a local area network, or a public data network (PDN), such as the Internet (Internet), or a private network deployed by operators, such as a configured IP multimedia network subsystem (internet protocol multimedia core network subsystem, IMS) service.
  • PDN public data network
  • Internet Internet
  • IMS IP multimedia core network subsystem
  • the functions in this embodiment of the application may also be referred to as network elements, network functions or functional entities, devices, etc.
  • the access and mobility management functions may also be referred to as access and mobility management network elements, or access and mobility management network functions, or access and mobility management functional entities, etc.
  • the names of the functions are not limited in this application, and those skilled in the art can replace the names of the above functions with other names to perform the same function, which all belong to the protection scope of the present application.
  • CM connection management
  • NAS non-access stratum
  • the NAS signaling connection includes two parts: the connection between the UE and the access network (AN), and the N2 connection between the AN and the AMF.
  • the NAS signaling connection between UE and AMF has two states: CM-IDLE state (ie, idle state), and CM-CONNECTED state (ie, RRC connected state).
  • the radio resource control inactive (RRC Inactive) state is referred to as the RRC Inactive state for short.
  • multicast/broadcast services can be transmitted in two ways: PDU session or multicast session, but there is a problem of waste of network resources.
  • PDU session In order to carry multicast services and ensure channel quality and data reliability, the UE remains in the RRC connection state, and the UE being in the RRC connection state for a long time will waste the scheduling resources of the base station.
  • public safety Public safety
  • this application provides a communication method as shown in Figure 2.
  • This method can be implemented by access network equipment, or by multicast/broadcast session management network elements, or by access It is performed through the interaction of network devices, session management network elements, and multicast/broadcast session management network elements.
  • the access network device can be a transmission reception point (transmission reception point, TRP), a 5G base station (gNodeB, gNB), or a chip, etc.
  • the session management network element can be an SMF, a chip of an SMF, etc.
  • the multicast/ The broadcast session management network element may be an MB-SMF or an MB-SMF chip, which is not specifically limited in this application.
  • the access network device is RAN
  • the session management network element is SMF
  • the multicast/broadcast session management network element is MB-SMF as an example, as follows:
  • the MB-SMF obtains reference information of a first MBS session.
  • the reference information of the first MBS session may be used to represent the characteristics of the first MBS session.
  • the characteristics of the first MBS session can be understood as at least one of the following information: the performance of the first MBS session (for example, the transmission performance of the first MBS session, the reliability guarantee performance, etc.), the demand information of the first MBS session (for example, The application does not specifically limit the rate requirements, delay requirements, reliability requirements, etc.) of the first MBS session, or the priority information of the first MBS session (for example, the importance of the first MBS session, etc.).
  • the reference information of the first MBS session may include one or more of the following: the priority of the first MBS session, the reliability requirement of the first MBS session, the delay of the first MBS session, the ARP of the first MBS session , the first indication information used to indicate that the receiving end in the idle state or the RRC inactive state is allowed to receive the service data on the first MBS session, the second indication information used to indicate that the service quality QoS of the first MBS session does not meet the QoS requirement Instructions.
  • the reference information of the first MBS session may further include the identifier of the first MBS session.
  • the reference information of the first MBS session may also include other information, such as the service information or service type carried by the first MBS session, for example, the video service or voice or short message service carried by the first MBS session, which is not limited in this application .
  • one MBS session may serve multiple terminals, that is, terminals can receive multicast/broadcast service data by accessing the MBS session.
  • terminals can receive multicast/broadcast service data by accessing the MBS session.
  • a terminal can also receive service data of different multicast/broadcast services by accessing different MBS sessions.
  • MB-SMF may also obtain reference information of other MBS sessions, and here only the reference information of the first MBS session is used as an example for illustration, and it is not limited here that MB-SMF only obtains the first MBS session Reference information for the session.
  • the MB-SMF may pre-configure the reference information of the first MBS session, may also obtain the reference information of the first MBS session from other network elements, or may pre-configure part of the reference information of the first MBS session, and obtain the reference information of the first MBS session from other network elements.
  • the network element acquires part of the reference information of the first MBS session, which is not specifically limited in this application.
  • the reference information of the first MBS session can be acquired in the following manner, specifically as follows:
  • the MB-SMF may receive an MBS session establishment request, and the MBS session establishment request includes reference information of the first MBS session.
  • MB-SMF can receive MBS session establishment request (MBS session create) from application function (such as AF); MB-SMF can also receive MBS from NEF or multicast broadcast service function (multicast/broadcast service function, MBSF) Session establishment request; MB-SMF can also receive MBS session establishment request from AF through NEF or MBSF.
  • application function such as AF
  • MB-SMF can also receive MBS from NEF or multicast broadcast service function (multicast/broadcast service function, MBSF) Session establishment request
  • MB-SMF can also receive MBS session establishment request from AF through NEF or MBSF.
  • the present application does not specifically limit the specific source of the MBS session establishment request here.
  • the MB-SMF receives the first MBS session policy information from the policy management network element (such as PCF), and the first MBS session policy information includes the reference information of the first MBS session.
  • the policy management network element such as PCF
  • the MB-SMF receives the QoS information of the first MBS session from the application function or the policy management network element, and determines the reference information of the first MBS session according to the QoS information of the first MBS session.
  • the QoS information of the first MBS session includes reliability requirements, ARP and so on. For example, there is a corresponding relationship between the QoS information and the priority of the first MBS session, whether the receiver in the idle state or the RRC inactive state is allowed to receive service data on the first MBS session, and whether it is allowed to fail to meet the QoS requirements of the first MBS session , so acquiring the QoS information can indirectly determine the reference information of the first MBS session.
  • a low ARP value in the QoS information of the first MBS session corresponds to a high priority of the first MBS session
  • a high reliability requirement in the QoS information of the first MBS session corresponds to the fact that the first MBS session cannot be received in idle state etc.
  • the way to obtain the reference information of the first MBS session can reuse the existing solution process (such as MBS session establishment request, MBS policy management, etc.) Reference information for an MBS session.
  • existing solution process such as MBS session establishment request, MBS policy management, etc.
  • Step 202 the MB-SMF sends the reference information of the first MBS session to the SMF.
  • the SMF receives the reference information of the first MBS session.
  • the MB-SMF may receive an MBS session subscription request message from the SMF, and the MB-SMF may reply to the SMF with an MBS session subscription response message, where the MBS session subscription response message includes the reference information of the first MBS session.
  • Step 203 the SMF sends the reference information of the first MBS session to the RAN.
  • the RAN receives the reference information of the first MBS session.
  • the SMF may put the reference information of the first MBS session in an N2 information (N2info) container, and send the reference information of the first MBS session to the RAN through the AMF.
  • N2info N2 information
  • step 202 can be replaced by the MB-SMF sending the reference information of the first MBS session to the AMF, which will not be described here, but can be understood with reference to the example in Figure 6 below, correspondingly , in step 203, the AMF sends the reference information of the first MBS session to the RAN.
  • the MB-SMF sends the reference information of the first MBS session to the RAN through the AMF, and the shared tunnel is established between the RAN and the UPF for transmitting the data of the first MBS session.
  • the shared tunnel may be shared by two or more receiving ends, for example, two or more receiving ends may simultaneously use the shared tunnel to receive data of the first MBS session.
  • Step 204 the RAN triggers the first receiving end corresponding to the first MBS session to enter an idle state or an RRC inactive state according to the reference information of the first MBS session.
  • the "trigger" action involved in this application can be implemented by sending a trigger message or trigger information from the RAN to the first receiving end.
  • the trigger message or trigger information can be existing or newly added.
  • the trigger information may be carried in an existing message without limitation.
  • the RAN may send a notification message to the first receiving end, and the notification message is used to notify or instruct the first receiving end to enter an idle state or an RRC inactive state; for another example, the RAN may send an RRC configuration message or an RRC configuration message to the first receiving end.
  • the reconfiguration message is used to trigger the first receiving end to enter an idle state or an RRC inactive state. Further, the first receiving end may enter an idle state or an RRC inactive state according to the trigger message or trigger information.
  • the first receiving end corresponding to the first MBS session enters the idle state or the RRC inactive state.
  • the receiving end receives service data of the first MBS session in an idle state or an RRC inactive state.
  • the access network device triggers the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state according to the reference information of the first MBS session.
  • the reference information of the first MBS session triggers the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state, and may also perform data processing on the reference information of the first MBS session (for example, based on AI, the reference information lower than the MBS session information for data analysis, etc.), triggering the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state, which is not specifically limited here.
  • the first receiving end corresponding to the first MBS session can be understood as a terminal receiving service data through the first MBS session, that is, a terminal receiving service data of the first MBS session, and can also be understood as a terminal accessing the first MBS session , the first receiving end may be one or more terminals, which is not limited here. Subsequently, the first receiving end corresponding to the first MBS session may be referred to as the first receiving end of the first MBS for short.
  • the service data of the MBS session may refer to the service data supported by the MBS session, or the service data transmitted through the MBS session.
  • the receiving end corresponding to the MBS session usually receives the service data of the MBS session in the RRC connection state.
  • Network access devices have a lot of processing resources.
  • access network devices cannot support the reception of a large number of MBS sessions. end is in the RRC connection state.
  • the access network device can respectively trigger the receiving end corresponding to each MBS session to enter the idle state or the RRC inactive state according to the reference information of each MBS session, so as to avoid long-term occupation of the access network device for maintaining the MBS session
  • the processing resources of the receiving end in the RRC connection state can further save the processing resources of the access network equipment.
  • the RAN in step 204, according to the reference information of the first MBS session, the RAN triggers the receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state, which can be divided into the following cases :
  • Case 1 The reference information of the first MBS session includes the priority of the first MBS session.
  • the priority of the first MBS session in the above reference information of the first MBS session may be understood as the priority of the performance requirement and/or the priority of the quality requirement of the first MBS session.
  • step 204 can be implemented in the following two optional ways:
  • the RAN triggers the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state.
  • the protocol stipulates that the greater the value of the priority, the lower the priority.
  • the first preset priority is 3, and the priority of the first MBS session is 4. Since 4 is greater than 3, that is, the priority of the first MBS session is lower than that of the first MBS session.
  • a preset priority will trigger the receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state.
  • Mode 2 if the priority of the first MBS session is the lowest among all MBS sessions of the RAN, the RAN triggers the first receiving end corresponding to the first MBS session to enter an idle state or an RRC inactive state.
  • all MBS sessions of the RAN involved in this application can be understood as: all MBS sessions currently provided by the RAN, or all MBS sessions established through the RAN. All the MBS sessions related to the RAN below can be understood by referring to this.
  • the number of MBS sessions in the RAN is 3, that is, there are 3 MBS sessions established on the RAN, and the MBS session identifiers are respectively MBS session 1, MBS session 2, and MBS session 3, wherein the priority of MBS session 1 is 1.
  • the priority of MBS session 2 is 2, and the priority of MBS session 3 is 5. From this, it can be seen that the priority of MBS session 3 is the lowest, and the corresponding reception of MBS session 3 (that is, MBS session 3 is the first MBS session)
  • the RAN will not trigger the receiving end corresponding to MBS session 1 or MBS session 2 to enter the idle state or RRC inactive state.
  • this application triggers all MBS sessions of the access network device through the access network device.
  • the priority is the lowest or the priority is lower than the first.
  • the first receiving end corresponding to a preset priority MBS session (that is, the first MBS session) enters the idle state or the RRC inactive state, and under the premise of guaranteeing the business data transmission of the high priority MBS session, saving The processing resources of the access network equipment are reduced.
  • Case 2 The reference information of the first MBS session includes the reliability requirement of the first MBS session.
  • step 204 can specifically be implemented in the following two optional ways:
  • the RAN triggers the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state;
  • the reliability requirement of the first threshold corresponds to a packet error rate (packet error rate, PER) of 10 -6
  • the reliability requirement of the first MBS session corresponds to a packet error rate of 10 -3 . If the reliability requirement is lower than the first threshold, then the receiving end corresponding to the first MBS session is triggered to enter an idle state or an RRC inactive state.
  • the RAN triggers the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state.
  • the MBS session identifiers are respectively MBS session 1, MBS session 2, and MBS session 3, wherein the reliability of MBS session 1
  • the packet error rate corresponding to the requirement is 10 -3
  • the packet error rate corresponding to the reliability requirement of MBS session 2 is 10 -6
  • the packet error rate corresponding to the reliability requirement of MBS session 3 is 10 -7
  • the MBS session 1 has the lowest reliability requirement
  • the receiving end corresponding to MBS session 1 that is, MBS session 1 is the first MBS session
  • enters the idle state or the RRC inactive state at the same time, the receiving end corresponding to MBS session 2 or MBS session 3 is maintained at
  • the RRC connection state does not trigger the receiving end corresponding to the MBS session 2 or MBS session 3 to enter the idle state or the RRC inactive state.
  • the reliability requirement of the first MBS session may be the highest reliability requirement among the 5QI reliability requirements of the QoS flow of the first MBS session.
  • the first MBS session may include multiple QoS flows, and the 5QI values of different QoS flows may be different, and the reliability requirement with the highest reliability requirement among the 5QIs of the QoS flows is selected as the reliability requirement of the first MBS session Reliable reception of QoS flow data with higher reliability requirements can be guaranteed as much as possible.
  • the first MBS session includes 3 QoS flows, namely QoS flow1, QoS flow2, and QoS flow3.
  • the reliability requirement of the first MBS session is determined according to the reliability requirement of the 5QI association of the QoS flow of the first MBS session.
  • the reliability requirements associated with the 5QIs of all QoS flows in the first MBS session can be weighted and calculated to determine the reliability requirements of the first MBS session, for example, the reliability requirements associated with the 5QIs of QoS flow1 to QoS flow3 correspond to After the packet error rates are summed, an average determined value ((10 ⁇ 3 +10 ⁇ 6 +10 ⁇ 9 )/3) is taken as the reliability requirement of the first MBS session.
  • the reliability requirement of the first MBS session is determined by multiplying the packet error rate corresponding to the reliability requirement of the 5QI association of each QoS flow by different weight values according to the characteristics of different QoS flows, which is not specifically limited in this application.
  • the reliability requirement of the first MBS session is the lowest among all MBS sessions of the access network device or lower than the first threshold, which indicates that the service demand of the first MBS session is not high or not very important, so
  • This application uses the access network device to trigger the first receiving end corresponding to the MBS session with the lowest reliability requirement or the reliability requirement lower than the first threshold (that is, the first MBS session) among all MBS sessions of the access network device to enter the idle state or RRC inactive state. This mode not only ensures normal transmission of services requiring high reliability, but also saves processing resources of access network equipment.
  • Case 3 The reference information of the first MBS session includes the delay of the first MBS session.
  • step 204 can specifically be implemented in the following two optional ways:
  • the RAN triggers the first receiving end corresponding to the first MBS session to enter an idle state or an RRC inactive state.
  • the delay corresponding to the second threshold is 10 milliseconds (ms), and the delay of the first MBS session is 15 ms. Since the delay of the first MBS session is higher than the second threshold, the access network device triggers the first MBS session The corresponding receiving end enters an idle state or an RRC inactive state.
  • the RAN triggers the first receiver corresponding to the first MBS session to enter the idle state or the RRC inactive state.
  • the MBS session identifiers are MBS session 1, MBS session 2, and MBS session 3 respectively, wherein the delay of MBS session 1 is 20ms, and the delay of MBS session 2 is 15ms.
  • the delay of MBS session 3 is 5ms, so it can be seen that the delay of MBS session 1 is the highest, then the receiving end corresponding to MBS session 1 enters the idle state or RRC inactive state; The end is in the RRC connection state, that is, the receiving end corresponding to the MBS session 2 or MBS session 3 is not triggered to enter the idle state or the RRC inactive state.
  • the delay of the first MBS session may be the delay with the lowest delay among the 5QIs of the QoS flows of the first MBS session.
  • the first MBS session may include multiple QoS streams, and the 5QI values of different QoS streams may be different. Selecting the 5QI of the QoS stream with the lowest delay as the delay of the first MBS session can guarantee as much as possible Reliable reception of low-latency QoS flow data. It is assumed that the first MBS session includes two QoS flows, and the identifiers of the QoS flows are QoS flow1 and QoS flow2 respectively.
  • the delay of the first MBS session is determined according to the delay associated with the 5QI of the QoS flow of the first MBS session.
  • the time delay associated with 5QI of all QoS flows of the first MBS session can be weighted and calculated to determine the time delay of the first MBS session.
  • the average determined value ((15+10)/2) is used as the delay of the first MBS session.
  • the time delay associated with the 5QI of each QoS flow is multiplied by different weight values to determine the time delay of the first MBS session, which is not specifically limited in this application.
  • the delay of the first MBS session is the highest among all MBS sessions of the access network device or higher than the second threshold, which indicates that the service demand of the first MBS session is not high or not very important, so this application
  • the access network device triggers the first receiver corresponding to the MBS session with the highest delay or a delay higher than the second threshold among all MBS sessions of the access network device to enter the idle state or the RRC inactive state, which not only guarantees the delay requirement
  • the normal transmission of high-volume services also saves the processing resources of the access network equipment.
  • Case 4 The reference information of the first MBS session includes the ARP of the first MBS session.
  • step 204 can specifically be implemented in the following two optional ways:
  • the access network device triggers the first receiving end corresponding to the first MBS session to enter an idle state or an RRC inactive state.
  • the ARP value ranges from 1 to 15, 1 has the highest priority, and 15 has the lowest priority.
  • the ARP value corresponding to the third threshold is 5, and the ARP value of the first MBS session is 2. Because If the ARP of the first MBS session is higher than the third threshold, then the receiving end corresponding to the first MBS session is triggered to enter an idle state or an RRC inactive state.
  • Mode 2 if the ARP of the first MBS session is the highest among all MBS sessions prepared by the RAN, the RAN triggers the first receiving end corresponding to the first MBS session to enter an idle state or an RRC inactive state.
  • the MBS session identifiers are MBS session 1, MBS session 2, and MBS session 3 respectively, where the ARP value of MBS session 1 is 12, and the ARP value of MBS session 2 is 10.
  • the ARP value of MBS session 3 is 5, so it can be seen that the ARP of MBS session 1 is the lowest, then the receiving end corresponding to MBS session 1 enters the idle state or the RRC inactive state; at the same time, maintain the correspondence between MBS session 2 or MBS session 3
  • the receiver is in the RRC connection state, that is, the receiver corresponding to the MBS session 2 or MBS session 3 is not triggered to enter the idle state or the RRC inactive state.
  • the ARP of the first MBS session may be the ARP with the lowest ARP of the QoS flow of the first MBS session.
  • the first MBS session may include multiple QoS flows, and the ARP values of different QoS flows may be different. Selecting the ARP with the lowest ARP among the ARPs of the QoS flows as the ARP of the first MBS session can ensure a low ARP as much as possible. Reliable reception of QoS flow data. It is assumed that the first MBS session includes two QoS flows, and the identifiers of the QoS flows are QoS flow1 and QoS flow2 respectively.
  • the ARP of the first MBS session is determined according to the ARP of the QoS flow of the first MBS session.
  • the ARPs of all QoS flows of the first MBS session can be weighted and calculated to determine the ARP of the first MBS session, for example, the ARPs of QoS flow1 to QoS flow2 are summed and the average value determined ((4+3 )/2) as ARP for the first MBS session.
  • the ARP of each QoS flow is multiplied by different weight values to determine the ARP of the first MBS session, which is not specifically limited in this application.
  • the ARP of the first MBS session is the lowest or higher than the third threshold among all MBS sessions of the access network device, which indicates that the service demand of the first MBS session is not high or not very important, so this application passes the access
  • the network device triggers the first receiving end corresponding to the MBS session with the highest ARP or ARP higher than the third threshold among all MBS sessions of the access network device to enter the idle state or the RRC inactive state, which will not affect the execution of other services, and also The processing resource of the access network device can be saved.
  • the reference information of the first MBS session includes first indication information for indicating that the receiving end in the idle state or the RRC inactive state is allowed to receive service data on the first MBS session.
  • step 204 may specifically include: when the reference information of the first MBS session includes first indication information for indicating that the receiving end in the idle state or the RRC inactive state is allowed to receive service data on the first MBS session , the RAN triggers the first receiving end corresponding to the first MBS session to enter an idle state or an RRC inactive state.
  • the first indication letter may include the identifier of the first MBS session, which is used to identify the first MBS session.
  • the reference information of the first MBS session includes second indication information for indicating that the QoS requirement of the first MBS session is not satisfied.
  • step 204 may specifically include: when the reference information of the first MBS session includes second indication information for indicating that the QoS of the first MBS session does not meet the QoS requirements, then the RAN triggers the The first receiving end enters an idle state or an RRC inactive state.
  • the second instruction letter may include the identifier of the first MBS session, which is used to identify the first MBS session.
  • the reference information of the first MBS session may also be a combination of the above six kinds of reference information.
  • the RAN may trigger the corresponding The first receiving end enters the idle state or the RRC inactive state;
  • the reference information of the first MBS session is the priority of the first MBS session and the reliability requirement of the first MBS session, then the RAN can trigger the priority to be lower than the first preset
  • the first receiver corresponding to the first MBS session whose priority and reliability requirement is lower than the first threshold enters an idle state or an RRC inactive state.
  • the reference information of the first MBS session is the priority of the first MBS session, the reliability requirements of the first MBS session, and the first indication information, then the RAN can trigger The first receiving end corresponding to the first MBS session with the first threshold and meeting the first indication information requirement enters an idle state or an RRC inactive state. This is only described as an example, and it may also involve various combinations of reference information in actual application, which are not illustrated here.
  • the above step 204 can also be replaced by: the RAN maintains the first receiving end corresponding to the first MBS session in the RRC connection state according to the reference information of the first MBS session, that is, the first receiving end is in the RRC connection state.
  • the service data of the first MBS session is received in an active state.
  • how the RAN maintains the first receiving end corresponding to the first MBS session in the RRC connection state can refer to the above-mentioned opposite implementations of specific methods in the six situations where the access network device uses the reference information of the first MBS session, for example, in When the reference information of an MBS session includes the priority of the first MBS session, the priority of the first MBS session is higher than the first preset priority, or the priority is not the lowest among all MBS sessions of the access network device, or In all MBS sessions of the access network device, the priority is the highest, then maintain the first receiving end corresponding to the first MBS session in the RRC connection state, which is only described as an example here, and other methods can refer to the above-mentioned first MBS session The opposite implementation manners of the reference information are not described here.
  • the RAN determines to maintain the first receiving end corresponding to the first MBS session (MBS session 1) in the RRC connected state, it may trigger the receiving ends corresponding to the MBS session 2 and MBS session 3 to enter the idle state or the RRC inactive state.
  • the above method may also include: determining the resource usage of the RAN (whether There are remaining resources, etc.), or the attribute of the receiving end of the MBS session (whether it is a relay device), etc.
  • This application is introduced through the following two situations, but in actual application, it may be other situations, or a combination of the following two situations, or a combination of the following two situations and other situations, and this application does not specifically limit it here.
  • the RAN determines that the number of terminals that are in the RRC connection state and receive service data of the MBS session is higher than a preset value.
  • the RAN determines that the number of terminals in the RRC connected state is higher than a preset value.
  • the RAN can pre-configure the preset value locally or obtain the preset value from the network device, and the RAN can record the number of terminals in the RRC connection state or record the number of terminals receiving MBS sessions in the RRC connection state , the present application does not specifically limit it here.
  • the receiving end will be triggered to enter the idle state or the RRC inactive state; when the access network device is not congested or under light load (access When the number of terminals is small), all receivers can be supported to receive service data of the MBS session in the RRC connection state, so as to better meet the service transmission performance of the MBS session.
  • the RAN does not receive the fourth indication information from the SMF.
  • the fourth indication information may be used to indicate that the first receiving end is not allowed to receive service data of the first MBS session in idle state or RRC inactive state, or indicate that the first receiving end provides relay service for the first MBS session, etc.
  • the SMF may determine the fourth indication information by receiving service indication information from the first receiving end or a report from the first receiving end.
  • the service instruction information may indicate that the first receiving end provides relay service for the first MBS session;
  • the report of the first receiving end is a remote terminal (ie, non-relaying terminal) report (Remote UE Report) served by the relay terminal, and the remote UE Report
  • the terminal report includes the identification (Remote User ID) of the remote terminal and the information (Remote UE info) of the remote terminal, and the SMF can determine that the first receiving end provides relay services for the first MBS session according to the report of the first receiving end.
  • the SMF may send fourth indication information to the RAN. If the RAN receives the fourth indication information, it does not trigger the first receiving end corresponding to the first MBS session to enter an idle state or an RRC inactive state. If the RAN does not receive the fourth indication information, it may trigger the first receiving end corresponding to the first MBS session to enter an idle state or an RRC inactive state according to the reference information of the first MBS session. For example, if the number of first receivers of the first MBS session in the RAN is 3, the identifiers of the first receivers are UE1, UE2, and UE3 respectively, where UE1 provides relay services for the first MBS session, and UE2 and UE3 do not provide relay services for the first MBS session.
  • the receiving ends corresponding to UE2 and UE3 enter the idle state or the RRC inactive state, and the receiving end corresponding to UE1 is kept in the RRC connection state to receive the service data of the first MBS session.
  • the access network device may not trigger the receiving end of the first MBS session to enter The idle state or the RRC inactive state can maintain the RRC connected state of the receiving end of the first MBS session.
  • the access network device may not trigger the receiving end of the first MBS session Entering the idle state or the RRC inactive state can maintain the RRC connected state of the receiving end of the first MBS session. In this way, the performance such as the reliability of the relay terminal receiving the MBS session is given priority, so that the relay terminal can send the correct MBS session service data to the remote terminal, and prevent the relay terminal from sending wrong MBS session service data to the remote terminal .
  • the method may further include: the RAN determines that the first receiving end There is no service data transmission other than the service data of the first MBS session, or the access network device determines that there is no service other than the service data of the first MBS session at the first receiving end.
  • the RAN may set a timer for the transmission of service data other than the service data of the first MBS session by the first receiving end, and the timer records that the first receiving end does not transmit service data other than the service data of the first MBS session The time length, when the timer expires, the RAN determines that there is no service data transmission other than the service data of the first MBS session at the first receiving end.
  • the access network device determines that there is no service data transmission at the first receiving end except for the service data of the first MBS session, which can avoid affecting the normal transmission of other service data at the first receiving end.
  • triggering the receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state may include: triggering the first receiving end according to the reference information of the first receiving end.
  • a receiving end enters an idle state or an RRC inactive state.
  • the RAN may also receive reference information from the first receiving end of the SMF, the reference information of the first receiving end may indicate the characteristics of the first receiving end, and further, may also indicate the characteristics of the first receiving end in the first MBS, specifically Specifically, the reference information of the first receiving end may be the reference information of the first receiving end in the first MBS session.
  • the RAN may trigger the first receiving end to enter an idle state or an RRC inactive state according to the reference information of the first receiving end.
  • the reference information of the first receiving end includes one or more of the following: the priority of the first receiving end in the first MBS session, indicating that the first receiving end is allowed to receive the first MBS in an idle state or an RRC inactive state
  • the third indication information of the service data on the session includes one or more of the following: the priority of the first receiving end in the first MBS session, indicating that the first receiving end is allowed to receive the first MBS in an idle state or an RRC inactive state.
  • the reference information of the first receiving end may further include session identification information, and the session identification information may indicate the MBS session to which the reference information belongs or corresponds.
  • the reference information of the first MBS session may also include other information, such as service information or service type carried by the first MBS session, which is not limited in this application.
  • the session identification information may be MBS session ID, without limitation.
  • the access network device can trigger the receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state according to the reference information of the first MBS session, which can be divided into the following situations:
  • Case 1 The reference information of the first receiving end includes the priority of the first receiving end in the first MBS session.
  • the reference information of the first receiving end may be used to represent the characteristics of the first receiving end.
  • the characteristics of the first receiving end can be understood as at least one of the following information: the performance of the first receiving end (for example, the transmission performance of the first receiving end, reliability guarantee performance, etc.), the demand information of the first receiving end (for example, the first receiving end’s rate requirements, delay requirements, reliability requirements, etc.), or the priority information of the first receiving end (for example, the importance of the first receiving end, etc.), etc., are not specifically limited in this application.
  • Mode 1 If the priority of the first receiving end is lower than the second preset priority, the RAN triggers the first receiving end to enter an idle state or an RRC inactive state.
  • the protocol stipulates that the greater the value of the priority, the lower the priority.
  • the second preset priority is 3, and the priority of the first receiving end in the first MBS session is 4. Since 4 is greater than 3, that is, the priority of the first receiving end is If the priority is less than the second preset priority, then trigger the first receiving end to enter the idle state or the RRC inactive state.
  • it can also be stipulated that the smaller the value of the priority, the smaller the priority. This application does not specify here It is limited and can be flexibly set according to actual needs.
  • Mode 2 If the priority of the first receiving end is the lowest among receiving ends corresponding to the first MBS session of the RAN, the RAN triggers the first receiving end to enter an idle state or an RRC inactive state.
  • All receiving ends corresponding to the first MBS session can be understood as: all terminals receiving service data through the first MBS session of the access network device, that is, all terminals receiving service data of the first MBS session of the access network device, It can also be understood as all terminals accessing the first MBS session through the access network device, and the all terminals may refer to all terminals currently receiving service data through the first MBS session of the access network device.
  • the identifiers of the first receivers are UE1, UE2, and UE3 respectively, wherein the priority of UE1 is 1, the priority of UE2 is 2, and the priority of UE3 is UE1.
  • the priority is 5, so it can be seen that UE3 has the lowest priority.
  • the receiving end corresponding to UE3 will enter the idle state or the RRC inactive state (because UE3 has the lowest priority); if If the reference information of the first UE session is not UE3's (UE1 or UE2's), then the receiving end corresponding to the first UE session is not put into an idle state or an RRC inactive state.
  • all receiving terminals corresponding to the first MBS session can be understood as: all terminals receiving service data through the first MBS session of the access network device, that is, receiving service data of the first MBS session of the access network device. All terminals can also be understood as all terminals accessing the first MBS session through the access network device, and the all terminals can refer to all terminals currently receiving service data through the first MBS session of the access network device.
  • the priority of the first MBS session triggered by the access network device is the lowest or the priority is lower than the second preset priority.
  • the first receiving end of the level enters the idle state or the RRC inactive state, which will not only not affect the service execution of other terminals in the receiving end corresponding to the first MBS session, but also save the processing resources of the access network equipment.
  • the reference information of the first receiving end includes the third indication information used to indicate that the first receiving end is allowed to receive service data on the first MBS session in the idle state or the RRC inactive state, and the first receiving end is triggered to enter the idle state or RRC inactive state.
  • the third indication letter may further include the identification of the first receiving end.
  • the reference information of the first receiving end may also be a combination of the above two types of information, for example, the reference information of the first receiving end is the priority of the first receiving end in the first MBS session and the third indication information, Then the RAN may trigger the first receiving end whose priority is lower than the first preset priority and meets the requirements of the third indication information to enter the idle state or the RRC inactive state.
  • the situation of combination of information is not illustrated here one by one.
  • the reference information of the first receiving end may be carried by the above-mentioned MBS session establishment request, and may also be carried by the above-mentioned first MBS session policy information, which is not specifically limited in this application.
  • MB-SMF can also send part of the reference information of the first receiving end to SMF. For example, before sending the reference information of the first receiving end to SMF, MB-SMF can receive the first The identification information of the receiving end; the MB-SMF sends the reference information of the first receiving end to the SMF according to the identification information.
  • SMF sends to MB-SMF the identifiers UE1 and UE2 of the first receiving end (actually the first receiving end of the first MBS session includes UE1, UE2, UE3 and UE4), then MB-SMF sends reference information of UE1 and UE2 to SMF That's it.
  • processing resources can be saved, and it is avoided to send all the reference information of the receiving end of the first MBS session to the session management network element.
  • the reference information of the first receiving end may also be obtained from the UDM.
  • the SMF obtains the MBS session subscription data (MBS subscription data) of the first receiving end from the UDM.
  • the MBS session subscription data includes the reference information of the first receiving end, and the SMF can store the MBS session subscription data.
  • the SMF sends the reference information of the first receiving end to the RAN through the AMF.
  • the UDM acquires the reference information of the first receiving end.
  • the UDM may obtain the reference information of the first receiving end from the AF through the NEF, or the UDM may obtain the reference information of the first receiving end from the UDR.
  • the reference information of the first receiving end can be realized by adding a new field in the MBS subscription data, for example, the field is Reference info (reference information) in the MBS subscription data shown in Table 1.
  • the specific content of MBS subscription data is shown in Table 1 below.
  • MBS allowed indicates that the UE is authorized to use the multicast MBS service
  • MBS Session ID(s) indicates the MBS session that the UE is allowed to join, wherein the MBS session identification may include the identification of the first MBS session .
  • Reference info can be specifically understood as the reference information of the UE in each MBS session, and the reference information of the UE in each MBS session may include the reference information of the first receiving end, that is, the first receiving end in the first MBS Reference information in the session.
  • the reference information of the first receiving end may include the identifier of the first MBS session, for example, MBS session ID.
  • the RAN may also determine, according to the reference information of the first receiving end of the first MBS session, that the first receiving end maintains the RRC connection state.
  • the RAN uses the reference information of the first receiving end of the first MBS session can refer to the above method, for example, when the reference information of the first receiving end includes the priority of the first receiving end in the first MBS session, the priority of the first receiving end higher than the second preset priority, or the priority of the receiving end corresponding to the first MBS session of the access network device is not the lowest, or the priority of the receiving end corresponding to the first MBS session of the access network device is the highest , then maintain the first receiving end corresponding to the first MBS session in the RRC connection state.
  • the identifiers of the first receiving ends are UE1, UE2 and UE3 respectively. If the RAN determines to maintain the first receiving end (UE1) in the RRC connected state, it may trigger the corresponding receiving ends of UE2 and UE3 to enter the idle state or the RRC inactive state.
  • the RAN may also determine whether to trigger the first receiving end to enter the idle state or enter the RRC inactive state.
  • the RAN may receive RRC inactive assistance information (RRC inactive assistance information) from the AMF, and the RRC inactive assistance information is used to assist the RAN Determine whether the UE can enter the RRC inactive state.
  • RRC inactive assistance information RRC inactive assistance information
  • the RAN if the RAN receives the RRC inactive assistance information from the AMF or determines that the RRC inactive assistance information is included in the UE context, the RAN triggers the UE to enter the RRC inactive state, otherwise the RAN triggers the UE to enter the idle state.
  • the RAN keeps the first receiving end in the RRC connected state, that is, the UE receives the RRC in the RRC connected state Service data of the first MBS session.
  • the RAN receives indication information from the AMF whether the UE is allowed to enter the RRC inactive state to receive data (such as MBS service data) or whether the UE is capable of entering the RRC inactive state to receive data (such as MBS service data), If the UE is allowed to enter the RRC inactive state to receive data or the UE is capable of entering the RRC inactive state to receive data, the RAN determines to trigger the UE to enter the RRC inactive state, otherwise the RAN determines to trigger the UE to enter the idle state.
  • data such as MBS service data
  • MBS service data data
  • the RAN determines to trigger the UE to enter the RRC inactive state, otherwise the RAN determines to trigger the UE to enter the idle state.
  • the AMF can obtain the indication information whether the UE is allowed to enter the RRC inactive state to receive data from the UDM or the SMF, or the AMF can obtain the indication information from the UE whether the UE is capable of entering the RRC inactive state to receive data.
  • FIG. 3 is a schematic diagram of interaction among UE1, RAN, SMF, MB-SMF, PCF and AF, as follows:
  • step 301 the AF sends an MBS session establishment request message to the MB-SMF.
  • the MBS session establishment request information may include the reference information of the first MBS session and the identifier of the first MBS session.
  • the identifier of the first MBS session is used to identify the MBS session, for example, a temporary mobile group identifier (TMGI).
  • TMGI temporary mobile group identifier
  • step 302 the PCF sends the first MBS session policy information to the MB-SMF.
  • the first MBS session policy information includes reference information of the first MBS session and an identifier of the first MBS session.
  • step 301 and step 302 are optional steps, for example, both may be executed, and there is no distinction in execution sequence, and one may be selected for execution without limitation.
  • MB-SMF may determine the reference information of the first MBS session according to the MBS session establishment request message and the QoS information of the first MBS session in the first MBS session policy information, for example, if the MB-SMF The reference information 1 of the first MBS session determined by the SMF according to the QoS information of the first MBS session in the MBS session establishment request message, and the first MBS session determined by the MB-SMF according to the QoS information of the first MBS session in the first MBS session policy information.
  • the reference information 2 of the MBS session wherein the reference information 1 of the first MBS session is inconsistent with the reference information 2 of the first MBS session, and the MB-SMF may use the reference information 2 of the first MBS session as the reference information of the first MBS session.
  • Step 303 UE1 sends a request message for requesting to join the first MBS session to the SMF.
  • the request message carries the identifier of the first MBS session and indication information of joining the first MBS session.
  • the request message may be a session modification request message.
  • UE1 may send a request message for requesting to join the first MBS session to the SMF through the AMF.
  • step 304 the SMF sends a request message for acquiring context information of the first MBS session to the MB-SMF.
  • the request message may be a first MBS session context acquisition request message.
  • Step 305 the MB-SMF sends the context information of the first MBS session to the SMF, where the context information of the first MBS session includes the reference information of the first MBS session.
  • the SMF can acquire the reference information of the first MBS session from the context information of the first MBS session.
  • Step 306 the SMF sends the reference information of the first MBS session to the RAN.
  • the reference information in step 306 can be sent through N2info or other messages, which is not limited here.
  • Step 307 RAN triggers UE1 to enter idle state or RRC inactive state according to the reference information of the first MBS session.
  • step 307 may refer to the relevant description of step 204 in FIG. 2 above, and trigger UE1 to enter the idle state or the RRC inactive state, and details are not described here.
  • the above step 307 may be replaced by: the RAN maintains UE1 in the RRC connected state according to the reference information of the first MBS session, that is, UE1 receives the first MBS session in the RRC connected state business data.
  • how the RAN maintains the first receiving end in the RRC connected state can refer to the relevant description of step 204 in FIG. Let me repeat.
  • Step 308 UE1 enters idle state or RRC inactive state.
  • UE1 enters the idle state or the RRC inactive state, and receives the service data of the first MBS session in the idle state or the RRC inactive state.
  • the UE1 may enter the idle state or the RRC inactive state according to the trigger of the RAN in step 307, for details, please refer to the relevant description above, and will not repeat them here.
  • the RAN can trigger the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state according to the reference information of the first MBS session, so as to avoid long-term occupation of the RAN for maintaining the reception of the first MBS session
  • the processing resources of the terminal in the RRC connection state can further save the processing resources of the RAN.
  • FIG. 4 is a schematic diagram of interaction among UE1, RAN, SMF, MB-SMF, PCF and AF, as follows:
  • step 401 the AF sends an MBS session establishment request message to the MB-SMF.
  • the MBS session establishment request information may include reference information of the receiving end of the first MBS session and an identifier of the receiving end of the first MBS session.
  • the identifier of the receiving end is used to identify the receiving end, for example, a temporary mobile subscriber identity (TMSI).
  • TMSI temporary mobile subscriber identity
  • step 402 the PCF sends the first MBS session policy information to the MB-SMF.
  • the first MBS session policy information includes the reference information of the receiving end of the first MBS session and the identifier of the receiving end of the first MBS session.
  • the SMF may also acquire reference information of the receiving end of the first MBS session from the UDM, and the reference information may be provided by the AF to the UDM.
  • step 401 and step 402 are optional steps, for example, both may be executed, and there is no distinction in the execution order, and one may be selected for execution without limitation.
  • Step 403 UE1 sends a request message for requesting to join the first MBS session to the SMF.
  • the request message includes the identifier of the first MBS session and indication information of joining the first MBS session.
  • the request message may be a session modification request message.
  • Step 404 the SMF sends to the MB-SMF a request message for acquiring the context information of the first MBS session.
  • the context information of the first MBS session includes reference information of the receiving end of the first MBS session.
  • the request message may specifically be a context request message of the first MBS session.
  • the request message may carry the identity of the receiving end of the first MBS session, such as the identity of UE1, then the MB-SMF may send the reference information of UE1 to the SMF, if the request message does not carry the identity of the receiving end of the first MBS session, then The MB-SMF sends the reference information of all receiving ends of the first MBS session to the SMF.
  • Step 405 the MB-SMF sends the context information of the first MBS session to the SMF, wherein the context information of the first MBS session includes reference information of the receiving end of the first MBS session.
  • the SMF may obtain the reference information of the receiving end of the first MBS session from the context information of the first MBS session.
  • Step 406 the SMF sends the reference information of the receiving end of the first MBS session to the RAN.
  • the reference information can be sent through N2info or other messages, which is not limited here.
  • Step 407 RAN triggers UE1 to enter idle state or RRC inactive state according to the reference information of the receiving end of the first MBS session.
  • step 407 may refer to the related description of step 204 in FIG. 2 above, and trigger UE1 to enter the idle state or the RRC inactive state, which will not be described in detail here.
  • the above step 407 may also be replaced by: the RAN determines that UE1 maintains the RRC connection state according to the reference information of UE1 in the first MBS session.
  • the RAN determines that UE1 maintains the RRC connection state according to the reference information of UE1 in the first MBS session.
  • Step 408 UE1 enters idle state or RRC inactive state.
  • UE1 enters the idle state or the RRC inactive state, and receives the service data of the first MBS session in the idle state or the RRC inactive state.
  • the UE1 may enter the idle state or the RRC inactive state according to the trigger of the RAN in step 407, for details, please refer to the relevant description above, and will not repeat them here.
  • This application triggers the receiving end of the first MBS session to enter the idle state or RRC inactive state, which can ensure that the high priority receiving end normally receives the service data of the first MBS session.
  • Fig. 5 shows another communication method in this application.
  • the first receiving end is UE, and the UE provides relay service for the first MBS session as an example.
  • Fig. 5 shows the communication between UE, RAN and SMF Interaction diagram, as described below:
  • Step 501 UE sends service indication information to SMF.
  • the service indication information may be sent when the UE requests to join the first MBS session, for example, the service indication information is carried in the request message for requesting to join the first MBS session, or may be sent through other messages or processes, for example, the UE Send the service indication information to the SMF through the MBS session modification procedure.
  • the service indication information may be used to instruct the UE to provide the relay service for the first MBS session.
  • the UE providing the relay service for the first MBS session may refer to that the remote UE can receive service data of the first MBS session through the UE.
  • step 502 the UE sends a remote UE report (for example, Remote UE Report) to the SMF.
  • a remote UE report for example, Remote UE Report
  • the remote UE report may include the identity of the remote UE (for example, Remote User ID) and the information of the remote UE (for example, Remote UE info), and the information of the remote UE may be the network-side communication information allocated by the UE for the remote UE. Address information.
  • step 501 and step 502 are optional steps, for example, both may be executed, and there is no distinction in execution sequence, and one may be selected for execution without limitation.
  • Step 503 the SMF determines that the UE provides the relay service for the first MBS session.
  • step 503 can be implemented in the following manner:
  • the SMF determines according to the service indication information in step 501 that the UE provides the relay service for the first MBS session.
  • the service indication information is information that the UE provides the relay service
  • the SMF determines that the UE provides the relay service for the first MBS session according to the service indication information.
  • Mode 2 The SMF determines according to the remote UE report in step 502 that the UE provides the relay service for the first MBS session.
  • the remote UE report includes the identity of the remote UE and the information of the remote UE, and the SMF determines that the UE provides the relay service for the first MBS session according to the remote UE report.
  • step 504 the SMF notifies the RAN: the UE is not allowed to receive service data of the first MBS session in idle state, or the UE provides relay service for the first MBS session.
  • the SMF may notify the RAN through the N2 information.
  • the N2 information includes notification information or a notification message to notify the RAN: the UE is not allowed to receive the service data of the first MBS session in the idle state, or the UE is not allowed to receive the service data of the first MBS session.
  • the N2 information includes notification information or a notification message to notify the RAN: the UE is not allowed to receive the service data of the first MBS session in the idle state, or the UE is not allowed to receive the service data of the first MBS session.
  • the UE provides relay services for the business data of the first MBS session by performing steps 501-503, and notify the RAN through step 504; for layer 2 relay
  • steps 501-504 may not be performed, but step 505 is performed to determine that the UE provides relay service for the service data of the first MBS session by the RAN.
  • the steps to be executed are indicated by solid lines
  • the steps to be executed are indicated by dotted lines.
  • All executable steps are indicated by thick solid lines.
  • Step 505 the RAN determines that the UE provides the relay service for the first MBS session through the transmission of the service data of the first MBS session.
  • the transmission of the service data of the first MBS session can be understood as the service data of the first MBS session is sent to the remote UE through the UE.
  • the RAN sends the service data of the first MBS session to the remote UE through the UE according to the connection information between the remote UE and the UE.
  • the connection information between the remote UE and the UE can be understood as the connection information for the remote UE to access the RAN through the UE, and the connection information can be determined by sending an RRC request message from the remote UE.
  • the remote UE sends an RRC request message to the RAN through the UE, and the RAN may know that the UE provides a relay service for the remote UE.
  • the RAN knows that the UE provides the relay service for the remote UE, and transmits the service data of the first MBS session to the remote UE, so the RAN may know that the UE provides the relay service for the first MBS session.
  • step 506 the RAN determines that the UE remains in the RRC connected state.
  • the RAN determines that the UE remains in the RRC connected state according to the N2 information that the UE is not allowed to receive the service data of the first MBS session in the idle state or the UE is providing a relay service.
  • the RAN determines according to step 505 that the UE provides relay service for the first MBS session, and then determines that the UE remains in the RRC connected state.
  • the UE is still in the RRC connected state.
  • the identities of the first receivers are UE1, UE2, and UE3 respectively, wherein UE1 (as a layer 3 relay or a layer 2 relay) is the first
  • the MBS session provides the relay service. If UE2 and UE3 do not provide the relay service for the first MBS session, the RAN triggers the receiving end corresponding to UE2 and UE3 to enter the idle state or the RRC inactive state, and maintains the receiving end corresponding to UE1 in the RRC connection state. Service data of the first MBS session is received.
  • the above-mentioned embodiment described in FIG. 5 can be executed before step 204, step 307, and step 407 of the embodiments shown in FIGS. 2 to 3.
  • the embodiment described in FIG. The further judging condition that the receiving end is in the idle state or the RRC inactive state is used to trigger the first receiving end of the first MBS session to enter an appropriate state to ensure the reliability of communication transmission.
  • the performance such as the reliability of the relay UE receiving the MBS session can be guaranteed first, so that the relay terminal can send the correct MBS session service data to the remote UE, and prevent the relay UE from sending the wrong MBS session service to the remote UE data.
  • FIG. 6 another communication method is shown, which is applied to the process of establishing a shared tunnel, and the shared tunnel is established between the RAN and the UPF for transmitting data of the first MBS session.
  • the UPF may be a multicast UPF.
  • the RAN triggers the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state according to the reference information of the first MBS session.
  • the first receiving end is UE1 as an example.
  • the interaction diagram of UE1, RAN, SMF, AMF, NRF and MB-SMF is as follows:
  • Step 601 UE1 sends a request message for requesting to join the first MBS session to the SMF through the AMF.
  • the request message includes the identifier of the first MBS session and indication information of joining the first MBS session.
  • the request message may be a session modification request message, such as a PDU session modification request.
  • step 602 the SMF obtains the information of the MB-SMF serving the first MBS session from the NRF.
  • a plurality of MB-SMF information may be stored in the NRF, and the MB-SMF information may be an identifier of the MB-SMF, for example, name, ID, or address, without limitation.
  • Step 603 the SMF sends to the MB-SMF a request message for acquiring the context information of the first MBS session.
  • the context information of the first MBS session includes reference information of the first MBS session.
  • reference information reference may be made to relevant descriptions in the foregoing embodiments, and details are not repeated here.
  • the request message may specifically be a context request message of the first MBS session.
  • the request message may carry the identifier of the receiving end of the first MBS session, such as the identifier of UE1, then the MB-SMF may send the reference information of UE1 to the SMF, if the request message does not carry the first MBS session reception end, then the MB-SMF sends the reference information of all receiving ends of the first MBS session to the SMF.
  • Step 604 the MB-SMF sends the context information of the first MBS session to the SMF.
  • the context information of the first MBS session may include reference information of the receiving end of the first MBS session.
  • the SMF may obtain the reference information of the receiving end of the first MBS session from the context information of the first MBS session.
  • Step 605 the SMF determines whether UE1 is authorized to use the first MBS service.
  • step 605 may be replaced by the SMF determining whether UE1 is authorized to receive the first MBS service. If UE1 is authorized to use the first MBS service, step 606 can be performed. If UE1 is not authorized to use the first MBS service, SMF sends a response message through AMF to reject UE1 to join the first MBS session, which is not shown in FIG. 6 .
  • the SMF may determine whether UE1 is authorized to use the first MBS service according to the subscription data of the MBS session stored in the UDM.
  • the information included in the subscription data of the MBS session may be as shown in the above Table 1, MBS allowed, MBS Session ID(s) and Reference info.
  • the SMF can determine whether UE1 is authorized to use the MBS service according to MBS allowed.
  • the identifier of the MBS session that UE1 is authorized to join can be learned according to the MBS Session ID(s).
  • MBS Session ID(s) usually UE1 is authorized to join There may be multiple MBS session identifiers. If the MBS session identifier includes the first MBS session identifier, the SMF determines that UE1 is authorized to use the first MBS service.
  • steps 602 to 605 are optional steps.
  • Step 606 If the SMF receives the UE1's request to join the first MBS session, it sends N2 session management information (n2 session management information, N2 SM info) to the AMF.
  • N2 session management information n2 session management information, N2 SM info
  • the N2 SM info message includes the identifier of the first MBS session, and the identifier of the first MBS session can be used by the RAN to determine the context information of the first MBS session.
  • Step 607 AMF sends N2 SM info to RAN.
  • the above method may further include the following steps 608 to 611 for establishing the shared tunnel of the first MBS session.
  • the MB-SMF may send the reference information of the first MBS session to the RAN through the AMF.
  • Step 608 RAN sends N2 MBS Session request (N2 MBS session request) message to AMF.
  • the N2 MBS Session request message may include: the identifier of the first MBS session and the downlink tunnel information (DL tunnel Info) allocated by the RAN for the first MBS session.
  • the DL tunnel Info can be understood as the downlink of the shared tunnel of the first MBS session. Tunnel information.
  • step 609 the AMF sends a context update request message of the first MBS session to the MB-SMF.
  • the context update request message of the first MBS session may include: the identifier of the first MBS session and the above-mentioned DL tunnel Info.
  • Step 610 MB-SMF sends a first MBS session context update response message to AMF.
  • the first MBS session context update response message includes the reference information of the first MBS session, and reference may be made to the aforementioned related descriptions, and details are not repeated here.
  • the first MBS session context update response message includes N2 SM info
  • the N2 SM info may include reference information of the first MBS session.
  • the MB-SMF may refer to step 301 or step 302 in FIG. 3 to acquire the reference information of the first MBS session.
  • step 611 the AMF sends the reference information of the first MBS session to the RAN.
  • the AMF first determines whether the RRC inactive assistance information has been sent to the RAN, and if the RRC inactive assistance information has been sent, then The AMF sends the reference information of the first MBS session to the RAN; if the RRC inactive assistance information is not sent, the AMF does not send the reference information of the first MBS session to the RAN.
  • the RRC inactive state assistance information is used to assist the RAN in determining whether the UE can enter the RRC inactive state.
  • the AMF may also send indication information to the MB-SMF whether the AMF has sent RRC inactive state assistance information, and the MB-SMF determines whether to send the reference information of the first MBS session in step 610 according to the indication information. information. If the indication information indicates that AMF has sent RRC inactive state assistance information, MB-SMF sends the reference information of the first MBS session to AMF; if the indication information indicates that AMF has not sent RRC inactive state assistance information, MB-SMF does not send AMF The reference information of the first MBS session is sent. That is, the UE1 can only enter the RRC inactive state when the RAN obtains the RRC inactive state assistance information. Therefore, when the AMF/MB-SMF knows that the RAN has not obtained the assistance information of the RRC inactive state, there is no need to send the reference information of the first MBS session.
  • Step 612 RAN triggers UE1 to enter idle state or RRC inactive state according to the reference information of the first MBS session.
  • the trigger may be by sending a notification message to UE1, so that UE1 enters an idle state or an RRC inactive state.
  • Step 613 UE1 enters idle state or RRC inactive state.
  • step 612 may refer to the relevant description of step 204 in FIG. 2 above, and trigger UE1 to enter the idle state or the RRC inactive state, and details are not described here.
  • the MB-SMF sends the reference information of the first MBS session to the RAN through the AMF, wherein the reference information of the first MBS session only needs to be sent once, and the RAN only stores one copy of the first MBS session.
  • the reference information of an MBS session avoids the situation that when each UE joins the first MBS session, the SMF needs to send the reference information of the first MBS session to the RAN through the AMF, thereby reducing signaling overhead.
  • the RAN does not need to store the reference information of the first MBS session in the context of each UE joining the first MBS session, which reduces the storage space occupied by the RAN.
  • the reference information of the first MBS session triggers the first receiving end to enter the idle state or the RRC inactive state, which can ensure that the receiving end with high priority receives the information of the first MBS session normally.
  • the service data of the first MBS session is transmitted through the shared tunnel, which saves transmission resources.
  • each device may include a corresponding hardware structure and/or software module for performing each function.
  • the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.
  • each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • FIG. 7 shows a possible exemplary block diagram of the communication device involved in the embodiment of the present application.
  • a communication device 700 may include: a processing unit 701 and a transceiver unit 702 .
  • the processing unit 701 is used to control and manage the actions of the communication device 700 .
  • the transceiver unit 702 is used to support communication between the communication device 700 and other devices.
  • the transceiving unit 702 may include a receiving unit and/or a sending unit, configured to perform receiving and sending operations respectively.
  • the communication device 700 may further include a storage unit, configured to store program codes and/or data of the communication device 700 .
  • the transceiver unit may be called an input-output unit, a communication unit, etc., and the transceiver unit may be a transceiver; the processing unit may be a processor.
  • the communication device is a module (such as a chip) in a communication device
  • the transceiver unit may be an input-output interface, an input-output circuit, or an input-output pin, etc., and may also be called an interface, a communication interface, or an interface circuit;
  • the processing unit may be a processor, a processing circuit, or a logic circuit.
  • the apparatus may be the above-mentioned access network equipment, multicast/broadcast session management network element, session management network element, and the like.
  • the transceiver unit 702 may be configured to receive reference information of a first MBS session from a session management network element or an access and mobility management network element, where the reference information of the first MBS session is used to represent the characteristics of the first MBS session
  • the processing unit 701 is configured to trigger the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state according to the reference information of the first MBS session.
  • the reference information of the first MBS session includes one or more of the following: the priority of the first MBS session, the reliability requirement of the first MBS session, the delay of the first MBS session, the The ARP of an MBS session, the first indication information used to indicate that the receiving end in the idle state or the RRC inactive state is allowed to receive the service data of the first MBS session, the first indication information used to indicate that the QoS requirements of the first MBS session are not satisfied Two indication information; wherein, the reliability requirement of the first MBS session is the highest reliability requirement in the 5QI of the QoS flow of the first MBS session; the delay of the first MBS session is the reliability requirement of the QoS flow of the first MBS session The lowest delay in 5QI; the ARP of the first MBS session is the lowest ARP of the ARP of the QoS flow of the first MBS session.
  • the processing unit 701 is specifically configured to perform the following operations:
  • the priority of the first MBS session is lower than the first preset priority, trigger the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state; or, if the priority of the first MBS session is in the receiving end
  • the lowest priority among all MBS sessions of the network access device triggers the first receiving end corresponding to the first MBS session to enter an idle state or an RRC inactive state.
  • the processing unit 701 is specifically configured to perform the following operations:
  • the reliability requirement of the first MBS session is lower than the first threshold, trigger the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state; or, if the reliability requirement of the first MBS session is in the access If the reliability requirement is the lowest among all the MBS sessions of the network equipment, trigger the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state.
  • the processing unit 701 is specifically configured to perform the following operations:
  • the time delay of the first MBS session is higher than the second threshold, trigger the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state; or, if the time delay of the first MBS session is in the access network device The time delay among all the MBS sessions is the highest, triggering the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state.
  • the processing unit 701 is specifically configured to perform the following operations:
  • the ARP of the first MBS session is higher than the third threshold, trigger the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state; or, if the ARP of the first MBS session is in all access network devices
  • the highest ARP in the MBS triggers the first receiving end corresponding to the first MBS session to enter an idle state or an RRC inactive state.
  • the first receiving end is one or more receiving ends corresponding to the first MBS session.
  • the processing unit 701 is specifically configured to determine that there is no service data transmission at the first receiving end except the service data of the first MBS session.
  • the transceiver unit 702 is further configured to receive reference information from a first receiving end of a session management network element or a unified data management network element, where the reference information of the first receiving end includes one or more of the following: The priority of a receiving end in the first MBS session, the third indication information used to indicate that the first receiving end is allowed to receive service data of the first MBS session in an idle state or an RRC inactive state; the processing unit 701 is also used to The reference information of the first receiving end triggers the first receiving end to enter an idle state or an RRC inactive state.
  • the processing unit 701 is further configured to perform the following operations:
  • the first receiving end in the first MBS session is lower than the second preset priority, trigger the first receiving end to enter the idle state or the RRC inactive state; or, if the first receiving end is in the first MBS session If the priority in the first MBS session is the lowest among all receiving ends corresponding to the first MBS session, the first receiving end is triggered to enter an idle state or an RRC inactive state.
  • the processing unit 701 is configured to trigger the first receiving end corresponding to the first MBS session to enter the idle state or the RRC inactive state according to the reference information of the first MBS session, and the processing unit 701 is further configured to: It is determined that the number of terminals in the RRC connection state and receiving service data of the MBS session is higher than a preset value; or, the access network device determines that the number of terminals in the RRC connection state is higher than a preset value.
  • the processing unit 701 is also used to determine that the fourth indication information has not been received, and the fourth indication information is used to indicate that the first receiving end is not allowed to receive the service data of the first MBS session in the idle state or the RRC inactive state, or that the first receiving end is The first MBS session provides the relay service.
  • the processing unit 701 can be used to obtain the reference information of the first MBS session, and the reference information of the first MBS session is used to represent the characteristics of the first MBS session; Send the reference information of the first MBS session with the mobility management network element.
  • the reference information of the first MBS session includes one or more of the following: the priority of the first MBS session, the reliability requirement of the first MBS session, the delay of the first MBS session, the The ARP of an MBS session, the first indication information used to indicate that the receiver in the idle state or the RRC inactive state is allowed to receive the service data of the first MBS session, the second indication information used to indicate that the QoS of the first MBS session is not satisfied Indication information; wherein, the reliability requirement of the first MBS session is the highest reliability requirement in the 5QI of the QoS flow of the first MBS session; the delay of the first MBS session is the 5QI of the QoS flow of the first MBS session The delay with the lowest medium delay; the ARP of the first MBS session is the lowest ARP among the ARPs of the QoS flow of the first MBS session.
  • the transceiver unit 702 is further configured to receive an MBS session establishment request, where the MBS session establishment request includes reference information of the first MBS session; or, receive the first MBS session policy information from the policy management network element , the first MBS session policy information includes reference information of the first MBS session; or, receiving QoS information of the first MBS session from an application function or a policy management network element, so that the processing unit 701 determines according to the QoS information of the first MBS session Reference information for the first MBS session.
  • the MBS session establishment request carries the reference information of the first receiving end, or the first MBS session policy information includes the reference information of the first receiving end; wherein, the first receiving end is the first receiving end corresponding to the One or more of the receivers.
  • the reference information of the first receiving end includes one or more of the following: the priority of the first receiving end in the first MBS session, indicating that the first receiving end is allowed to be in an idle state or RRC The third indication information of the service data on the first MBS session is received in an inactive state.
  • the transceiving unit 702 is further configured to receive identification information from the first receiving end of the session management network element; the processing unit 701 is further configured to send the first receiving end to the session management network element according to the identification information. terminal reference information.
  • the transceiving unit 702 may be configured to receive reference information of a first receiving end of a first MBS session from a session management network element, where the reference information of the first receiving end is used to represent the characteristics of the first receiving end; the processing unit 701 may be The first receiving end is triggered to enter an idle state or an RRC inactive state according to the reference information of the first receiving end.
  • the reference information of the first receiving end includes one or more of the following: the priority of the first receiving end in the first MBS session, indicating that the first receiving end is allowed to be in an idle state or RRC The third indication information of the service data on the first MBS session is received in an inactive state.
  • the processing unit 701 is further configured to perform the following operations:
  • the first receiving end in the first MBS session is lower than the second preset priority, trigger the first receiving end to enter the idle state or the RRC inactive state; or, if the first receiving end is in the first MBS session If the priority in the first MBS session is the lowest among all receiving ends corresponding to the first MBS session, the first receiving end is triggered to enter an idle state or an RRC inactive state.
  • the processing unit 701 before the processing unit 701 triggers the first receiving end to enter the idle state or the RRC inactive state, the processing unit 701 is also configured to determine that the first receiving end does not have service data other than the first MBS session Business data transfer.
  • the processing unit 701 is further configured to determine that the first receiving end is in the RRC connected state and The number of terminals receiving service data of the MBS session is higher than a preset value; or, it is determined that the number of terminals in an RRC connection state is higher than a preset value.
  • the processing unit 701 may be configured to acquire reference information of the first receiving end of the first MBS session, the reference information of the first receiving end is used to represent the characteristics of the first receiving end; the transceiver unit 702 is configured to send the session management network element Reference information of the first receiving end of the first MBS session.
  • the reference information of the first receiving end includes one or more of the following: the priority of the first receiving end in the first MBS session, indicating that the first receiving end is allowed to be in an idle state or RRC The third indication information of the service data on the first MBS session is received in an inactive state.
  • the transceiver unit 702 is further configured to receive an MBS session establishment request, where the MBS session establishment request includes reference information of the first receiving end of the first MBS session; or, receive the first MBS session from the policy management network element Session policy information, the first MBS session policy information includes reference information of the first receiving end of the first MBS session.
  • the transceiver unit 702 is further configured to receive the identification information of the first receiving end from the session management network element; the processing unit 701 is also configured to send the reference of the first receiving end to the session management network element according to the identification information information.
  • the communication device 800 may be a chip or a chip system.
  • the communication device may be located in the device involved in any of the foregoing method embodiments, such as an access network device, or an SMF, to execute actions corresponding to the device.
  • system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the communication device 800 includes a processor 810 .
  • the processor 810 is configured to execute the computer program stored in the memory 820, so as to realize the actions of each device in any of the above method embodiments.
  • the communication device 800 may also include a memory 820 for storing computer programs.
  • the memory 820 and the processor 810 are coupled. Coupling is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the memory 820 is integrated with the processor 810 .
  • processors 810 and memory 820 there may be one or more processors 810 and memory 820, which are not limited.
  • the communication device 800 may or may not include the transceiver 830 , which is indicated by a dashed box in the figure, and the communication device 800 may perform information exchange with other devices through the transceiver 830 .
  • the transceiver 830 may be a circuit, a bus, a transceiver or any other device that can be used for information exchange.
  • the communication apparatus 800 may be an access network device, a session management network element, or a multicast/broadcast session management network element in the implementation of the foregoing methods.
  • a specific connection medium among the transceiver 830, the processor 810, and the memory 820 is not limited.
  • the memory 820, the processor 810, and the transceiver 830 are connected through a bus.
  • the bus is represented by a thick line in FIG. 8, and the connection mode between other components is only for schematic illustration. It is not limited.
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 8 , but it does not mean that there is only one bus or one type of bus.
  • the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or Execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application.
  • a general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.
  • the memory may be a non-volatile memory, such as a hard disk (hard disk drive, HDD) or a solid-state drive (solid-state drive, SSD), etc., and may also be a volatile memory (volatile memory), such as Random-access memory (RAM).
  • the memory may also be, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
  • the memory in the embodiments of the present application may also be a circuit or any other device capable of implementing a storage function, for storing computer programs, program instructions and/or data.
  • the embodiment of the present application also provides another communication device 900, including: an interface circuit 910 and a logic circuit 920; the interface circuit 910, which can be understood as an input and output interface, can be used to perform any of the above methods
  • the sending and receiving steps of each device in the embodiment such as the above step 203, the sending step in which the SMF sends the reference information of the first MBS session to the RAN; the logic circuit 920 can be used to run codes or instructions to execute the execution of each device in any of the above embodiments method, which will not be repeated here.
  • the embodiments of the present application also provide a computer-readable storage medium, the computer-readable storage medium stores instructions, and when the instructions are executed, each device in any of the above method embodiments executes the method It is implemented, for example, so that the method performed by the RAN or the MB-SMF or the SMF in the embodiment shown in FIG. 2 is implemented.
  • the computer-readable storage medium may include: a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk, and other media capable of storing program codes.
  • this embodiment of the present application provides a communication system, which includes the access network device (such as RAN), session management network element (such as SMF) and multicast/
  • the broadcast session management network element such as MB-SMF
  • RAN access network device
  • SMF session management network element
  • MB-SMF broadcast session management network element
  • the communication system above may further include a terminal device (such as a UE, or a first receiving end), and the terminal device may perform data interaction with an access network device and a session management network element to perform any of the above method embodiments. related methods.
  • a terminal device such as a UE, or a first receiving end
  • the terminal device may perform data interaction with an access network device and a session management network element to perform any of the above method embodiments. related methods.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising the instruction device, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

Abstract

本申请实施例提供一种通信方法及装置，涉及通信技术领域。接入网设备接收来自会话管理网元或接入与移动管理网元的第一多播/广播业务MBS会话的参考信息，第一MBS会话的参考信息用于表示第一MBS会话的特征；接入网设备根据第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或无线资源控制RRC非激活态。本申请中MBS会话对应的接收端并非一直处于RRC连接态，接入网设备可根据MBS会话的参考信息触发MBS会话对应的接收端进入空闲态或RRC非激活态，可避免长期维护MBS会话对应的大量接收端处于RRC连接态，进一步地，可节约接入网设备的处理资源。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2021年12月31日提交中国专利局、申请号为202111672790.4、申请名称为“一种通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中；本申请要求在2022年03月11日提交中国专利局、申请号为202210239509.6、申请名称为“一种通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
针对视频等多播/广播业务(多播也可理解为组播，或替换为组播)对移动通信网络的冲击愈发强烈这一问题，移动通信网络(例如，第5代(the 5th generation，5G)移动通信网络)通过支持多播/广播业务(multicast broadcast service，MBS)的传输来有效解决上述问题。
目前，多播/广播业务可以采用协议数据单元(protocol data unit，PDU)会话或MBS会话两种方式来传输。采用PDU会话方式，为不同用户设备(user equipment，UE)分别建立不同资源来传输多播/广播业务，网络资源浪费严重；采用MBS会话方式，为不同UE建立相同资源来传输多播/广播业务，虽然能够减少网络资源浪费，但仍然存在网络资源浪费的问题。因此，如何减少MBS的网络资源浪费成为亟待解决的问题。
发明内容
本申请提供一种通信方法及装置，以节约网络资源。
第一方面，本申请提供一种通信方法，包括：
多播/广播会话管理网元获取第一MBS会话的参考信息，第一MBS会话的参考信息用于表示第一MBS会话的特征；向会话管理网元或接入与移动管理网元发送第一MBS会话的参考信息；会话管理网元或接入与移动管理网元向接入网设备发送第一MBS会话的参考信息，相应地，接入网设备接收来自会话管理网元的第一MBS会话的参考信息；接入网设备根据第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或无线资源控制(radio resource control，RRC)非激活态。
需要说明的是，第一MBS会话的特征可以理解为第一MBS会话的性能、需求信息、优先级信息等，本申请在此不具体限定。第一MBS会话对应的第一接收端可以理解为通过第一MBS会话接收业务数据的终端，即接收第一MBS会话的业务数据的终端，也可理解为接入第一MBS会话的终端，该第一接收端可以是一个或多个终端，本申请在此不具体限定。其中，MBS会话的业务数据指的是MBS会话支持的业务数据，或者通过MBS会话传输的业务数据，该业务数据为MBS数据。
另外，接入网设备根据第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，在实际应用时，可能直接通过第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，也可能是对第一MBS会话的参考信息进行数据处理(例如，基于人工智能(artificial intelligence，AI)对第一MBS会话的参考信息进行数据分析等)，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，在此不具体限定。
通常，接入网设备可以存在多个MBS会话，MBS会话对应的接收端通常在RRC连接态接收MBS会话的业务数据，接入网设备要维护MBS会话对应的接收端处于RRC连接态会耗费接入网设备大量的处理资源，但是，由于接入网设备的设备能力有限，以及处理资源有限(例如，处理能力有限，或存储空间有限)，接入网设备不能支持大量的MBS会话对应的接收端处于RRC连接态，采用本申请提供的方法，接入网设备可根据各MBS会话的参考信息分别触发各MBS会话对应的接收端进入空闲态或RRC非激活态，避免接入网设备长期占用用于维护MBS会话的接收端处于RRC连接态的处理资源，进一步地可节约接入网设备的处理资源。
在一种可选的方式中，第一MBS会话的参考信息包括以下一种或多种：第一MBS会话的优先级、第一MBS会话的可靠性要求、第一MBS会话的时延、第一MBS会话的分配保持优先级(allocation and retention priority，ARP)、用于指示允许处于空闲态或RRC非激活态的接收端接收第一MBS会话的业务数据的第一指示信息、用于指示允许不满足第一MBS会话的服务质量(quality of service，QoS)需求的第二指示信息。
其中，第一MBS会话的可靠性要求可以为第一MBS会话的QoS流的5G QoS指示符(the 5th generation quality of service identifier，5QI)中可靠性要求最高的可靠性要求；第一MBS会话的时延可以为第一MBS会话的QoS流的5QI中时延最低的时延；第一MBS会话的ARP可以为第一MBS会话的QoS流的ARP中最低的ARP。
通过参考上述第一MBS会话的参考信息，接入网设备可以触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，该方式避免接入网设备长期维护接收端处于RRC连接态的处理资源消耗，进一步地可以节约接入网设备的处理资源。
在一种可选的方式中，多播/广播会话管理网元接收MBS会话建立请求，MBS会话建立请求包括第一MBS会话的参考信息；或，接收来自策略管理网元的第一MBS会话策略信息，第一MBS会话策略信息包括第一MBS会话的参考信息；或，接收来自应用功能或策略管理网元的第一MBS会话的QoS信息，并根据第一MBS会话的QoS信息确定第一MBS会话的参考信息。
通过该方式，第一MBS会话的参考信息的获取方式可尽可能复用现有方案流程(如MBS会话建立请求、MBS的策略管理等)，以实现在不增加流程复杂性的同时获取到第一MBS会话的参考信息。
在一种可选的方式中，当第一MBS会话的参考信息包括第一MBS会话的优先级时，若第一MBS会话的优先级低于第一预设优先级，则接入网设备触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，若第一MBS会话的优先级在接入网设备的所有MBS会话中优先级最低，则接入网设备触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
需要指出的是，本申请中涉及的接入网设备的所有MBS会话可以理解为：该接入网 设备当前提供服务的所有MBS会话，或通过该接入网设备建立的所有MBS会话。
本申请中，优先级可以为性能要求的优先级，和/或质量要求的优先级等，该优先级越低可以表征该MBS会话的业务需求不高或不太重要，因此，本申请通过接入网设备触发接入网设备的所有MBS会话中优先级最低或优先级低于第一预设优先级的MBS会话(即第一MBS会话)对应的第一接收端进入空闲态或RRC非激活态，在保证了在优先保障高优先级MBS会话的业务数据传输的前提下，节约了接入网设备的处理资源。
在一种可选的方式中，当第一MBS会话的参考信息包括第一MBS会话的可靠性要求时，若第一MBS会话的可靠性要求低于第一阈值，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，若第一MBS会话的可靠性要求在接入网设备的所有MBS会话中可靠性要求最低，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
本申请中，第一MBS会话的可靠性要求在接入网设备的所有MBS会话中可靠性要求最低(例如，接入网设备的所有MBS会话包括MBS会话1和MBS会话2，MBS会话1对应的业务为MBS1，且MBS会话1的可靠性要求为0.9，MBS会话2对应的业务为MBS2，且MBS会话2的可靠性要求为0.99，由于0.9<0.99，因此MBS会话1的可靠性要求低于MBS会话2的可靠性要求)或低于第一阈值，表征该第一MBS会话的业务需求不高或不太重要，因此本申请通过接入网设备触发接入网设备的所有MBS会话中可靠性要求最低或可靠性要求低于第一阈值的MBS会话(即第一MBS会话)对应的第一接收端进入空闲态或RRC非激活态。该方式不但保证了可靠性要求高的业务的正常传输，还节约了接入网设备的处理资源。
在一种可选的方式中，当第一MBS会话的参考信息包括第一MBS会话的时延时，若第一MBS会话的时延高于第二阈值，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，若第一MBS会话的时延在接入网设备的所有MBS会话中时延最高，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
本申请中，第一MBS会话的时延在接入网设备的所有MBS会话中时延最高(例如，接入网设备的所有MBS会话包括MBS会话1和MBS会话2，MBS会话1对应的业务为MBS1，且MBS会话1的时延为5毫秒，MBS会话2对应的业务为MBS2，且MBS会话2的时延为10毫秒，由于5<10，因此MBS会话2的时延高于MBS会话1的时延)或高于第二阈值，表征该第一MBS会话的业务需求不高或不太重要，因此本申请通过接入网设备触发接入网设备的所有MBS会话中时延最高或时延高于第二阈值的MBS会话对应的第一接收端进入空闲态或RRC非激活态，不但保证了时延要求高的业务的正常传输，还节约了接入网设备的处理资源。
在一种可选的方式中，当第一MBS会话的参考信息包括第一MBS会话的ARP时，若第一MBS会话的ARP高于第三阈值，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，若第一MBS会话的ARP在接入网设备的所有MBS会话中ARP最高，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
本申请中，第一MBS会话的ARP在接入网设备的所有MBS会话中APR最低(例如，接入网设备的所有MBS会话包括MBS会话1和MBS会话2，MBS会话1对应的业务为MBS1，且MBS会话1的ARP为12，MBS会话2对应的业务为MBS2，且MBS会话2的APR为3，由于12>3(其中，ARR的取值范围为1～15，ARP的取值越大对应的优先级 越低)，因此MBS会话1的APR低于MBS会话2的APR)或高于第三阈值，表征第一MBS会话的业务需求不高或不太重要，因此本申请通过接入网设备触发接入网设备的所有MBS会话中ARP最高或ARP高于第三阈值的MBS会话对应的第一接收端进入空闲态或RRC非激活态，并不会影响其他业务的执行，且还可节约接入网设备的处理资源。
在一种可选的方式中，第一接收端为第一MBS会话对应的接收端中的一个或多个。
在一种可选的方式中，在接入网设备触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态之前，上述方法还包括：接入网设备确定第一接收端不存在除第一MBS会话的业务数据以外的业务数据传输，或者接入网设备确定第一接收端不存在除第一MBS会话的业务数据以外的其他业务。这样能够避免影响第一接收端的其他业务数据的正常传输。
在一种可选的方式中，上述方法还包括：接入网设备接收来自会话管理网元的第一接收端的参考信息。该会话管理网元的第一接收端的参考信息可能来自于多播/广播会话管理网元，还可能来自于统一数据管理网元。其中，第一接收端的参考信息可以包括以下一种或多种：第一接收端在第一MBS会话中的优先级、用于指示允许第一接收端处于空闲态或RRC非激活态接收第一MBS会话的业务数据的第三指示信息；上述接入网设备触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，包括：接入网设备根据第一接收端的参考信息触发第一接收端进入空闲态或RRC非激活态。
需要说明的是，由于第一MBS对应的不同接收端之间存在差异(如不同终端的签约差异)，为了保障金牌终端用户的MBS业务传输性能，本申请进一步基于第一接收端的参考信息触发第一接收端进入空闲态或RRC非激活态，能够保证高优先级的接收端正常接收第一MBS会话的业务数据。
在一种可选的方式中，MBS会话建立请求携带第一接收端的参考信息，或，第一MBS会话策略信息包括第一接收端的参考信息。
在一种可选的方式中，当第一接收端的参考信息包括第一接收端在第一MBS会话中的优先级时，若第一接收端在第一MBS会话中的优先级低于第二预设优先级，则接入网设备触发第一接收端进入空闲态或RRC非激活态；或，若第一接收端在第一MBS会话中的优先级在第一MBS会话对应的所有接收端中最低，则接入网设备触发第一接收端进入空闲态或RRC非激活态。
本申请中，第一MBS会话对应的所有接收端可以理解为：通过该接入网设备的第一MBS会话接收业务数据的所有终端，即接收该接入网设备的第一MBS会话的业务数据的所有终端，也可理解为通过该接入网设备接入第一MBS会话的所有终端，该所有终端可以指的是当前通过该接入网设备的第一MBS会话接收业务数据的所有终端。
本申请中，优先级越低表征该接收端的业务需求不高或不太重要，因此接入网设备触发接入网设备的第一MBS会话中优先级最低或优先级低于第二预设优先级的第一接收端进入空闲态或RRC非激活态，不但不会影响第一MBS会话对应的接收端中其他终端的业务执行，还能够节约接入网设备的处理资源。
在一种可选的方式中，多播/广播会话管理网元向会话管理网元发送第一接收端的参考信息之前，可接收来自会话管理网元的第一接收端的标识信息；多播/广播会话管理网元根据标识信息，向会话管理网元发送第一接收端的参考信息。通过该方式，按需发送实际参与的接收端的参考信息，避免将所有第一MBS会话的接收端的参考信息均发送至会话管 理网元，可节约处理和传输资源。
在一种可选的方式中，接入网设备根据第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态之前，接入网设备确定处于RRC连接态且接收MBS会话的业务数据的终端的数量高于预设值；或者，接入网设备确定处于RRC连接态的终端的数量高于预设值。通过该方式，仅当接入网设备处于拥塞时或处理能力不足时，才会触发接收端进入空闲态或RRC非激活态；在接入网设备未处于拥塞时或处于轻载(接入的终端数量较少)时，可以支持所有接收端在RRC连接态下来接收MBS会话的业务数据，更好地满足MBS会话的业务传输性能。
在一种可选的方式中，在接入网设备根据第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态之前，接入网设备未接收到第四指示信息，第四指示信息用于表示第一接收端不允许在空闲态或RRC非激活态接收第一MBS会话的业务数据，或表示第一接收端为第一MBS会话提供中继服务。通过该方式，优先保障中继终端正常接收第一MBS会话的业务数据，使得中继终端能够正常向远程终端发送第一MBS会话的业务数据。
第二方面，本申请提供一种通信方法，包括：多播/广播会话管理网元获取第一MBS会话的第一接收端的参考信息，第一接收端的参考信息用于表示第一接收端的特征；向会话管理网元发送第一接收端的参考信息。进一步地，会话管理网元向接入网设备发送第一接收端的参考信息，第一接收端的参考信息用于接入网设备触发第一接收端进入空闲态或RRC非激活态。
需要说明的是，由于第一MBS对应的不同接收端之间存在差异(如不同终端的签约差异)，为了保障金牌终端用户的MBS业务传输性能，本申请进一步基于第一接收端的参考信息触发第一接收端进入空闲态或RRC非激活态，能够保证高优先级的接收端正常接收第一MBS会话的业务数据。
在一种可选的方式中，第一接收端的参考信息包括以下一种或多种：第一接收端在第一MBS会话中的优先级、用于指示允许第一接收端处于空闲态或RRC非激活态接收第一MBS会话的业务数据的第三指示信息。
在一种可选的方式中，多播/广播会话管理网元接收MBS会话建立请求，MBS会话建立请求包括第一MBS会话的第一接收端的参考信息；或，接收来自策略管理网元的第一MBS会话策略信息，第一MBS会话策略信息包括第一接收端的参考信息。
在一种可选的方式中，多播/广播会话管理网元向会话管理网元发送第一接收端的参考信息之前，上述方法还包括：多播/广播会话管理网元接收来自会话管理网元的第一接收端的标识信息；多播/广播会话管理网元根据该标识信息，向会话管理网元发送第一接收端的参考信息。
在一种可选的方式中，当第一接收端的参考信息包括第一接收端在第一MBS会话中的优先级时，若第一接收端在第一MBS会话中的优先级低于第二预设优先级，则接入网设备触发第一接收端进入空闲态或RRC非激活态；或，若第一接收端在第一MBS会话中的优先级在第一MBS会话的所有接收端中优先级最低，则接入网设备触发第一接收端进入空闲态或RRC非激活态。
在一种可选的方式中，接入网设备触发第一接收端进入空闲态或RRC非激活态之前，接入网设备确定第一接收端不存在除第一MBS会话的业务数据以外的业务数据传输。
在一种可选的方式中，接入网设备根据第一接收端的参考信息，触发第一接收端进入空闲态或无线资源控制RRC非激活态之前，接入网设备确定处于RRC连接态且接收MBS会话的业务数据的终端的数量高于预设值；或者，接入网设备确定处于RRC连接态的终端的数量高于预设值。
第三方面，本申请提供一种通信方法，包括：
会话管理网元确定终端为第一MBS会话提供中继服务；会话管理网元向接入网设备发送指示信息，指示信息用于表示终端不允许在空闲态或RRC非激活态接收第一MBS会话的业务数据，或表示终端为第一MBS会话提供中继服务。相应地，接入网设备接收来自会话管理网元的指示信息；接入网设备可根据指示信息，确定终端不在空闲态或RRC非激活态接收MBS会话的业务数据。
通过该方式，优先保障中继终端接收MBS会话的可靠性，使得中继终端能够向远程终端发送正确的MBS会话的业务数据，避免中继终端向远程终端发送错误的MBS会话的业务数据。
在一种可选的方式中，会话管理网元可接收服务指示信息，服务指示信息表示终端为第一MBS会话提供中继服务；或，根据接收到的终端的报告，确定终端为第一MBS会话提供中继服务。
通过该方式，会话管理网元可复用现有方案流程，获知终端为第一MBS会话提供中继服务。
第四方面，本申请实施例提供一种通信装置，所述通信装置可以为接入网设备(比如第一方面中的接入网设备、第二方面中的接入网设备、第三方面中的接入网设备)或者设置在接入网设备内部的芯片，还可以为多播/广播会话管理网元(比如第一方面中的多播/广播会话管理网元、第二方面中的多播/广播会话管理网元、第三方面中的多播/广播会话管理网元)或者设置在多播/广播会话管理网元内部的芯片，还可以为会话管理网元(比如第一方面中的会话管理网元、第二方面中的会话管理网元、第三方面中的会话管理网元)或者设置在会话管理网元内部的芯片。所述通信装置具备实现上述第一方面至第三方面中任一方面的功能，比如，所述通信装置包括执行上述第一方面至第三方面中任一方面涉及步骤所对应的模块或单元或手段(means)，所述功能或单元或手段可以通过软件实现，或者通过硬件实现，也可以通过硬件执行相应的软件实现。
在一种可能的设计中，所述通信装置包括处理单元、收发单元，其中，收发单元可以用于收发信号，以实现该通信装置和其它装置之间的通信，比如，收发单元用于接收来自终端设备的配置信息；处理单元可以用于执行该通信装置的一些内部操作。所述收发单元可以称为输入输出单元、通信单元等，所述收发单元可以是收发器；所述处理单元可以是处理器。当通信装置是通信设备中的模块(如，芯片)时，所述收发单元可以是输入输出接口、输入输出电路或输入输出管脚等，也可以称为接口、通信接口或接口电路等；所述处理单元可以是处理器、处理电路或逻辑电路等。
在又一种可能的设计中，所述通信装置包括处理器，还可以包括收发器，所述收发器用于收发信号，所述处理器执行程序指令，以完成上述第一方面至第三方面中任意可能的设计或实现方式中的方法。其中，所述通信装置还可以包括一个或多个存储器，所述存储器用于与处理器耦合，所述存储器可以保存实现上述第一方面至第三方面中任一方面涉及的功能的必要计算机程序或指令。所述处理器可执行所述存储器存储的计算机程序或指令， 当所述计算机程序或指令被执行时，使得所述通信装置实现上述第一方面至第三方面任意可能的设计或实现方式中的方法。
在又一种可能的设计中，所述通信装置包括处理器，处理器可以用于与存储器耦合。所述存储器可以保存实现上述第一方面至第三方面中任一方面涉及的功能的必要计算机程序或指令。所述处理器可执行所述存储器存储的计算机程序或指令，当所述计算机程序或指令被执行时，使得所述通信装置实现上述第一方面至第三方面任意可能的设计或实现方式中的方法。
在又一种可能的设计中，所述通信装置包括处理器和接口电路，其中，处理器用于通过所述接口电路与其它装置通信，并执行上述第一方面至第三方面任意可能的设计或实现方式中的方法。
可以理解地，上述第四方面中，处理器可以通过硬件来实现也可以通过软件来实现，当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件来实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。此外，以上处理器可以为一个或多个，存储器可以为一个或多个。存储器可以与处理器集成在一起，或者存储器与处理器分离设置。在具体实现过程中，存储器可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请实施例对存储器的类型以及存储器与处理器的设置方式不做限定。
第五方面，本申请实施例提供一种通信系统，该通信系统包括上述第一方面到第三方面中的接入网设备、多播/广播会话管理网元以及会话管理网元。
第六方面，本申请提供了一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于实现上述第一方面到第三方面中任一种可能的设计中所述的方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第七方面，本申请还提供一种计算机可读存储介质，计算机可读存储介质中存储有计算机可读指令，当计算机可读指令在计算机上运行时，以使得计算机执行如第一方面到第三方面中任一种可能的设计中的方法。
第八方面，本申请提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述第一方面到第三方面的各实施例的方法。
上述第二方面至第八方面可以达到的技术效果，请参照上述第一方面中相应可能设计方案可以达到的技术效果说明，本申请这里不再重复赘述。
附图说明
图1示出了一种通信系统的示意图；
图2示出了本申请实施例提供的一种通信方法的流程示意图；
图3示出了本申请实施例提供的另一种通信方法的流程示意图；
图4示出了本申请实施例提供的另一种通信方法的流程示意图；
图5示出了本申请实施例提供的再一种通信方法的流程示意图；
图6示出了本申请实施例提供的再一种通信方法的流程示意图；
图7示出了本申请实施例提供的一种通信装置的结构示意图；
图8示出了本申请实施例提供的另一种通信装置的结构示意图；
图9示出了本申请实施例提供的另一种通信装置的结构示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。方法实施例中的具体操作方法也可以应用于装置实施例或系统实施例中。其中，在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。因此装置与方法的实施可以相互参见，重复之处不再赘述。
图1示出了一种移动通信网络架构的示意图，该网络架构中包括终端、接入网设备、接入和移动管理功能、会话管理功能、用户面功能、策略控制功能、网络切片选择功能、网络切片特定身份验证和授权功能、网络仓库功能、网络数据分析功能、统一数据管理功能、统一数据存储功能、认证服务功能、网络能力开放功能、终端无线能力管理功能、绑定支撑功能、应用功能，以及连接运营商网络的数据网络(data network，DN)。终端可通过当前位置的接入节点来接入无线网络。终端可通过接入网设备、用户面功能向数据网络发送业务数据，以及从数据网络接收业务数据。
接入和移动管理功能，主要用于移动网络中的终端的附着、移动性管理、跟踪区更新流程等。在5G通信系统中，接入和移动管理功能可以是接入与移动性管理功能(access and mobility management function，AMF)，在未来的通信系统(如6G通信系统)中，接入和移动管理功能可以仍是AMF，或者也可以具有其它名称，本申请并不限定。
会话管理功能，主要用于移动网络中的会话管理。具体功能如为终端分配互联网协议地址、选择提供报文转发功能的用户面功能等。在5G通信系统中，会话管理功能可以是会话管理功能网元(session management function，SMF)，在未来的通信系统(如6G通信系统)中，会话管理功能可以仍是SMF，或者也可以具有其它名称，本申请并不限定，其中，SMF可用于创建单播会话或PDU会话，主要用于单播会话或PDU会话的建立、修改、释放。在本申请中还涉及多播/广播会话管理网元，该多播/广播会话管理网元可以为多播会话管理网元(multicast/broadcast-session management function，MB-SMF)，主要用于移动网络中的MBS会话管理，如MBS会话的建立、修改、释放。
用户面功能，主要用于对用户报文进行处理，如转发和计费等。在5G通信系统中，用户面功能可以是用户面功能(user plane function，UPF)，在未来的通信系统(如6G通信系统)中，用户面功能可以仍是UPF，或者也可以具有其它名称，本申请并不限定。
策略控制功能，包含策略控制功能、计费策略控制功能、QoS控制等。在5G通信系统中，策略控制功能可以是策略控制功能(policy control function，PCF)，在未来的通信系统(如6G通信系统)中，策略控制功能可以仍是PCF，或者也可以具有其它名称，本申请并不限定。
网络切片选择功能，主要用于为终端的业务选择合适的网络切片。在5G通信系统中，网络切片选择功能可以是网络切片选择功能(network slice selection function，NSSF)，在未来的通信系统(如6G通信系统)中，网络切片选择功能可以仍是NSSF，或者也可以具有其它名称，本申请并不限定。
网络切片特定身份验证和授权功能(network slice-specific authentication and authorization function，NSSAAF)主要用于针对终端接入特定网络切片的验证和授权。
网络仓库功能，主要用于提供网络功能或网络功能所提供服务的注册和发现。在5G通信系统中，网络仓库功能可以是网络仓库功能(network repository function，NRF)，在未来的通信系统(如6G通信系统)中，网络仓库功能可以仍是NRF，或者也可以具有其 它名称，本申请并不限定。
网络数据分析功能，可以从各个网络功能，例如策略控制功能、会话管理功能、用户面功能、接入管理功能、应用功能(通过网络能力开放功能)收集数据，并进行分析和预测。在5G通信系统中，网络数据分析功能可以是网络数据分析功能(network data analytics function，NWDAF)，在未来的通信系统(如6G通信系统)中，网络数据分析功能可以仍是NWDAF，或者也可以具有其它名称，本申请并不限定。
统一数据管理功能，主要用于管理终端的签约信息。在5G通信系统中，统一数据管理功能可以是统一数据管理(unified data management，UDM)功能，在未来的通信系统(如6G通信系统)中，统一数据管理功能可以仍是UDM功能，或者也可以具有其它名称，本申请并不限定。
统一数据存储功能，主要用于存储结构化的数据信息，其中包括签约信息、策略信息，以及有标准格式定义的网络数据或业务数据。在5G通信系统中，统一数据存储功能可以是统一数据存储(unified data repository，UDR)功能，在未来的通信系统(如6G通信系统)中，统一数据存储功能可以仍是UDR功能，或者也可以具有其它名称，本申请并不限定。
认证服务功能，主要用于对终端进行安全认证。在5G通信系统中，认证服务功能可以是认证服务端功能(authentication server function，AUSF)，在未来的通信系统(如6G通信系统)中，认证服务功能可以仍是AUSF，或者也可以具有其它名称，本申请并不限定。
网络能力开放功能，可以将网络的部分功能有控制地暴露给应用。在5G通信系统中，网络能力开放功能可以是网络能力开放功能(network exposure function，NEF)，在未来的通信系统(如6G通信系统)中，网络能力开放功能可以仍是NEF，或者也可以具有其它名称，本申请并不限定。
终端无线能力管理功能，用于存储和管理网络内终端的无线能力。在5G通信系统中，终端无线能力管理功能可以是终端无线能力管理功能(user equipment radio capability management function，UCMF)，在未来的通信系统(如6G通信系统)中，终端无线能力管理功能可以仍是UCMF，或者也可以具有其它名称，本申请并不限定。
绑定支撑功能，用于维护用户网络之间互连的协议(internet protocol，IP)地址和服务功能的对应关系。在5G通信系统中，绑定支撑功能可以是绑定支撑功能(binding support function，BSF)，在未来的通信系统(如6G通信系统)中，绑定支撑功能可以仍是BSF，或者也可以具有其它名称，本申请并不限定。
应用功能，可以向运营商的通信网络的控制面功能提供各类应用的服务数据，或者从通信网络的控制面功能获得网络的数据信息和控制信息。在5G通信系统中，应用功能可以是应用功能(application function，AF)，在未来的通信系统(如6G通信系统)中，应用功能可以仍是AF，或者也可以具有其它名称，本申请并不限定。
数据网络，主要用于为终端提供数据传输服务。数据网络可以是私有网络，如局域网，也可以是公用数据网(public data network，PDN)，如因特网(Internet)，还可以是运营商合并部署的专有网络，如配置的IP多媒体网络子系统(internet protocol multimedia core network subsystem，IMS)服务。
需要说明的是，本申请实施例中功能还可以称为网元、网络功能或功能实体、设备等， 例如，接入和移动管理功能还可以称为接入和移动管理网元、或接入和移动管理网络功能、或接入和移动管理功能实体等。各个功能的名称在本申请中不做限定，本领域技术人员可以将上述功能的名称更换为其它名称而执行相同的功能，均属于本申请保护的范围。
当UE注册到网络后，对UE进行连接管理(connection management，CM)，主要包括管理UE与AMF之间的非接入层(non-access stratum，NAS)信令连接的建立和释放。NAS信令连接包括两部分：UE与接入网络(access network，AN)间的连接，以及AN与AMF间的N2连接。UE与AMF之间的NAS信令连接有两种状态：CM-IDLE状态(即空闲态)，以及CM-CONNECTED状态(即RRC连接态)。为了能按需释放空口资源同时又避免复杂的流程，在5G系统中，针对第三代移动通信伙伴项目(3rd generation partnership project，3GPP)接入的UE新引入一种RRC连接态的子状态：无线资源控制非激活(RRC Inactive)状态，简称为RRC Inactive状态。
目前，多播/广播业务可以采用PDU会话或多播会话两种方式来传输，但存在网络资源浪费的问题。为了承载多播的业务，保证信道的质量以及数据的可靠性，UE维持为RRC连接态，UE长期处于RRC连接态会浪费基站的调度资源。此外，公共安全(Public safety)要求一个RAN支持800个终端的广播，由于当前RAN能力受限，可能无法支持同时支持800个用户的RRC连接态接收多播数据。因此，如何减少多播/广播业务的网络资源浪费称为亟待解决的问题。
为了减少调度资源的浪费，本申请提供一种通信方法如图2所示，该方法可通过接入网设备来执行，也可通过多播/广播会话管理网元来执行，还可通过接入网设备、会话管理网元以及多播/广播会话管理网元的交互来执行。该接入网设备可以为传输接收点(transmission reception point，TRP)、5G基站(gNodeB，gNB)，也可以为芯片等，该会话管理网元可以为SMF、SMF的芯片等，该多播/广播会话管理网元可以为MB-SMF、MB-SMF的芯片，本申请在此不作具体限定。接下以接入网设备、会话管理网元以及多播/广播会话管理网元的交互来执行来说明。图2中以接入网设备为RAN，会话管理网元为SMF，多播/广播会话管理网元为MB-SMF为例，如下所述：
步骤201，MB-SMF获取第一MBS会话的参考信息。
其中，第一MBS会话的参考信息可以用于表示第一MBS会话的特征。第一MBS会话的特征可以理解为以下信息中的至少一种：第一MBS会话的性能(例如，第一MBS会话的传输性能、可靠保障性能等)、第一MBS会话的需求信息(例如，第一MBS会话的速率需求、时延需求、可靠性需求等)、或第一MBS会话的优先级信息(例如，第一MBS会话的重要性等)等，本申请在此不具体限定。
具体地，第一MBS会话的参考信息可包括以下一种或多种：第一MBS会话的优先级、第一MBS会话的可靠性要求、第一MBS会话的时延、第一MBS会话的ARP、用于指示允许处于空闲态或RRC非激活态的接收端接收第一MBS会话上的业务数据的第一指示信息、用于指示允许第一MBS会话的服务质量QoS不满足QoS需求的第二指示信息。
需要说明的是，第一MBS会话的参考信息中还可包括第一MBS会话的标识。第一MBS会话的参考信息中还可包括其他信息，如第一MBS会话所承载的业务信息或业务类型，例如，第一MBS会话承载的视频业务或语音或短信业务，本申请在此不限定。
需要说明的是，一个MBS会话可能服务多个终端，也即终端可通过接入MBS会话来接收多播/广播业务的业务数据。此外，一个终端也可通过接入不同的MBS会话来接收不 同的多播/广播业务的业务数据。此外，在实际应用时，MB-SMF可能还会获取其他MBS会话的参考信息，在此仅以第一MBS会话的参考信息为例来说明，在此并不限定MB-SMF仅获取第一MBS会话的参考信息。
另外，MB-SMF可预配置第一MBS会话的参考信息，也可从其他网元获取第一MBS会话的参考信息，也可以预配置第一MBS会话的参考信息中的部分信息，并且从其他网元获取第一MBS会话的参考信息中的部分信息，本申请在此不具体限定。为了更好地说明本申请的方案，可通过下述方式来获取第一MBS会话的参考信息，具体如下：
方式1：MB-SMF可接收MBS会话建立请求，该MBS会话建立请求包括第一MBS会话的参考信息。
其中，MB-SMF可以接收来自应用功能(如AF)的MBS会话建立请求(MBS session create)；MB-SMF也可以接收来自NEF或多播广播业务功能(multicast/broadcast service function，MBSF)的MBS会话建立请求；MB-SMF还可以通过NEF或MBSF接收来自AF的MBS会话建立请求。本申请在此不具体限定MBS会话建立请求的具体来源。
方式2：MB-SMF接收来自策略管理网元(如PCF)的第一MBS会话策略信息，在第一MBS会话策略信息包括第一MBS会话的参考信息。
方式3：MB-SMF接收来自应用功能或策略管理网元的第一MBS会话的QoS信息，并根据第一MBS会话的QoS信息确定第一MBS会话的参考信息。
其中，第一MBS会话的QoS信息包括可靠性要求、ARP等。例如，QoS信息与第一MBS会话的优先级、是否允许处于空闲态或RRC非激活态的接收端接收第一MBS会话上的业务数据以及是否允许不满足第一MBS会话的QoS需求存在对应关系，因此获取QoS信息可以间接确定第一MBS会话的参考信息。例如，第一MBS会话的QoS信息中ARP值低对应于第一MBS会话的优先级高，如第一MBS会话的QoS信息中可靠性要求高对应于该第一MBS会话不可以进行空闲态接收等，在此仅示例性描述，并不具体限定。
通过该方式，第一MBS会话的参考信息的获取方式可尽可能复用现有方案流程(如MBS会话建立请求、MBS的策略管理等)，以实现在不增加流程复杂性的同时获取到第一MBS会话的参考信息。
步骤202，MB-SMF向SMF发送第一MBS会话的参考信息。
相应地，SMF接收第一MBS会话的参考信息。
具体地，MB-SMF可从SMF接收MBS会话订阅请求消息，MB-SMF向SMF回复MBS会话订阅响应消息，MBS会话订阅响应消息中包括第一MBS会话的参考信息。
步骤203，SMF向RAN发送第一MBS会话的参考信息。
相应地，RAN接收第一MBS会话的参考信息。
具体地，SMF可将第一MBS会话的参考信息放在N2信息(N2info)容器中，通过AMF向RAN发送第一MBS会话的参考信息。
在共享隧道(shared tunnel)建立流程中，上述步骤202可替换为MB-SMF向AMF发送第一MBS会话的参考信息，在此不展开说明，可参照下述图6的示例来理解，相应地，在步骤203中，AMF向RAN发送第一MBS会话的参考信息。应理解的是，在共享隧道建立流程中，MB-SMF通过AMF向RAN发送第一MBS会话的参考信息，该共享隧道建立在RAN与UPF之间，用于传输第一MBS会话的数据。具体地，该共享隧道可以由两个或两个以上的接收端共享，例如，两个或两个以上的接收端可以同时使用该共享隧 道来接收第一MBS会话的数据。
步骤204，RAN根据第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
需要指出的是，本申请中涉及的“触发”动作可以通过RAN向第一接收端发送触发消息或触发信息来实现，该触发消息或触发信息可以是现有的，也可以是新增的，具体地，触发信息可以携带在现有消息中，不予限制。例如，RAN可以向第一接收端发送通知消息，该通知消息用于通知或指示第一接收端进入空闲态或RRC非激活态；再例如，RAN可向第一接收端发送RRC配置消息或RRC重新配置消息，以触发第一接收端进入空闲态或RRC非激活态。进一步地，第一接收端可以根据触发消息或触发信息，进入空闲态或RRC非激活态。
此外，上述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，可以理解为第一接收端从RRC连接态转变为空闲态或RRC非激活态，还可以进一步理解为第一接收端在空闲态或RRC非激活态接收第一MBS会话的业务数据。
上述步骤204中，接入网设备根据第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，在实际应用时，可能直接通过第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，也可能是对第一MBS会话的参考信息进行数据处理(例如，基于AI对低于MBS会话的参考信息进行数据分析等)，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，在此不具体限定。
此外，第一MBS会话对应的第一接收端可以理解为通过第一MBS会话接收业务数据的终端，即接收第一MBS会话的业务数据的终端，也可理解为接入第一MBS会话的终端，该第一接收端可以是一个或多个终端，在此不予限定。后续，可以将第一MBS会话对应的第一接收端简称为第一MBS的第一接收端。
其中，MBS会话的业务数据可以指的是MBS会话支持的业务数据，或者通过MBS会话传输的业务数据。
通常，接入网设备可以存在多个MBS会话，MBS会话对应的接收端通常在RRC连接态接收MBS会话的业务数据，接入网设备要维护MBS会话对应的接收端处于RRC连接态会耗费接入网设备大量的处理资源，但是，由于接入网设备的设备能力有限，以及处理资源有限(例如，处理能力有限，或存储空间有限)，接入网设备不能支持大量的MBS会话对应的接收端处于RRC连接态。采用上述实施例提供的方法，接入网设备可根据各MBS会话的参考信息分别触发各MBS会话对应的接收端进入空闲态或RRC非激活态，避免接入网设备长期占用用于维护MBS会话的接收端处于RRC连接态的处理资源，进一步地可节约接入网设备的处理资源。
可选地，在上述实施例的一种实施场景下，步骤204中RAN根据第一MBS会话的参考信息，触发第一MBS会话对应的接收端进入空闲态或RRC非激活态，可分如下情况：
情况1：第一MBS会话的参考信息包括第一MBS会话的优先级。
其中，上述第一MBS会话的参考信息中的第一MBS会话的优先级可以理解为第一MBS会话的性能要求的优先级，和/或质量要求的优先级等。
在情况1下，步骤204具体可通过如下两种可选的方式实现：
方式1，若第一MBS会话的优先级低于第一预设优先级，则RAN触发第一MBS会 话对应的第一接收端进入空闲态或RRC非激活态。
例如，协议规定优先级的数值越大优先级越小，第一预设优先级为3，第一MBS会话的优先级为4，由于4大于3，也即第一MBS会话的优先级小于第一预设优先级，那么触发第一MBS会话对应的接收端进入空闲态或RRC非激活态，在实际应用时，还可规定优先级的数值越小优先级越小，本申请在此不具体限定，可根据实际需求灵活设置。
方式2，若第一MBS会话的优先级在RAN的所有MBS会话中优先级最低，则RAN触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
需要指出的是，本申请中涉及的RAN的所有MBS会话可以理解为：该RAN当前提供服务的所有MBS会话，或通过该RAN建立的所有MBS会话。下文涉及到RAN的所有MBS会话的地方可参照此处理解。
例如，RAN的MBS会话的数目为3，即有3个MBS会话建立在该RAN上，MBS的会话标识分别为MBS会话1、MBS会话2以及MBS会话3，其中，MBS会话1的优先级为1，MBS会话2的优先级为2，MBS会话3的优先级为5，由此可知MBS会话3的优先级最低，则将MBS会话3(即MBS会话3为第一MBS会话)对应的接收端进入空闲态或RRC非激活态；同时，RAN不会触发MBS会话1或MBS会话2对应的接收端进入空闲态或RRC非激活态。
本申请中，优先级越低可以表征该MBS会话的业务需求不高或不太重要，因此本申请通过接入网设备触发接入网设备的所有MBS会话中优先级最低或优先级低于第一预设优先级的MBS会话(即第一MBS会话)对应的第一接收端进入空闲态或RRC非激活态，在保证了在优先保障高优先级MBS会话的业务数据传输的前提下，节约了接入网设备的处理资源。
情况2：第一MBS会话的参考信息包括第一MBS会话的可靠性要求。
在情况2下，步骤204具体可通过如下两种可选的方式实现：
方式1，若第一MBS会话的可靠性要求低于第一阈值，则RAN触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；
例如，第一阈值的可靠性要求对应的误包率(packet error rate，PER)为10 -6，第一MBS会话的可靠性要求对应的误包率为10 -3，由于第一MBS会话的可靠性要求低于第一阈值，那么触发第一MBS会话对应的接收端进入空闲态或RRC非激活态。
方式2，若第一MBS会话的可靠性要求在RAN的所有MBS会话中可靠性要求最低，则RAN触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
例如，若RAN的MBS会话的数目为3，即有3个MBS会话建立在该RAN上，MBS的会话标识分别为MBS会话1、MBS会话2以及MBS会话3，其中，MBS会话1的可靠性要求对应的误包率为10 -3，MBS会话2的可靠性要求对应的误包率为10 -6，MBS会话3的可靠性要求对应的误包率为10 -7，由此可知MBS会话1的可靠性要求最低，则将MBS会话1(即MBS会话1为第一MBS会话)对应的接收端进入空闲态或RRC非激活态；同时维持MBS会话2或MBS会话3对应的接收端在RRC连接态，即不触发MBS会话2或MBS会话3对应的接收端进入空闲态或RRC非激活态。
可选地，第一MBS会话的可靠性要求可以为第一MBS会话的QoS流的5QI中可靠性要求最高的可靠性要求。例如，第一MBS会话可能包括多个QoS流，不同的QoS流的5QI的取值可能是不同的，选择QoS流的5QI中可靠性要求最高的可靠性要求作为第一 MBS会话的可靠性要求可以尽可能地保障可靠性要求更高的QoS流数据可靠接收。假定，第一MBS会话包括3个QoS流，分别为QoS flow1、QoS flow2、QoS flow3。其中，QoS flow1的5QI值为1，5QI＝1关联的可靠性要求对应的误包率为10 -3；QoS flow2的5QI值为3，5QI＝3关联的可靠性要求对应的误包率为10 -6；QoS flow3的5QI值为5，5QI＝5关联的可靠性要求对应的误包率为10 -9。由于QoS flow3的5QI关联的可靠性要求最高，因此可将5QI＝5关联的可靠性要求10 -9作为第一MBS会话的可靠性要求。
可选地，第一MBS会话的可靠性要求是根据第一MBS会话的QoS流的5QI关联的可靠性要求确定的。例如，可将第一MBS会话的所有QoS流的5QI关联的可靠性要求进行加权计算，确定第一MBS会话的可靠性要求，如，将QoS flow1～QoS flow3的5QI关联的可靠性要求对应的误包率进行加和后取平均确定的值((10 -3+10 -6+10 -9)/3)作为第一MBS会话的可靠性要求。再例如，根据不同QoS流的特征确定各QoS流的5QI关联的可靠性要求对应的误包率乘上不同的权重值，确定第一MBS会话的可靠性要求，本申请在此不具体限定。
本申请中，第一MBS会话的可靠性要求在接入网设备的所有MBS会话中可靠性要求最低或低于第一阈值，表征该第一MBS会话的业务需求不高或不太重要，因此本申请通过接入网设备触发接入网设备的所有MBS会话中可靠性要求最低或可靠性要求低于第一阈值的MBS会话(即第一MBS会话)对应的第一接收端进入空闲态或RRC非激活态。该方式不但保证了可靠性要求高的业务的正常传输，还节约了接入网设备的处理资源。
情况3：第一MBS会话的参考信息包括第一MBS会话的时延。
在情况3下，步骤204具体可通过如下两种可选的方式实现：
方式1，若第一MBS会话的时延高于第二阈值，则RAN触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
例如，第二阈值对应的时延为10毫秒(ms)，第一MBS会话的时延为15ms，由于第一MBS会话的时延高于第二阈值，那么接入网设备触发第一MBS会话对应的接收端进入空闲态或RRC非激活态。
方式2，若第一MBS会话的时延在RAN的所有MBS会话中时延最高，则RAN触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
例如，若RAN的MBS会话的数目为3，MBS的会话标识分别为MBS会话1、MBS会话2以及MBS会话3，其中，MBS会话1的时延为20ms，MBS会话2的时延为15ms，MBS会话3的时延为5ms，由此可知MBS会话1的时延最高，则将MBS会话1对应的接收端进入空闲态或RRC非激活态；同时维持MBS会话2或MBS会话3对应的接收端在RRC连接态，即不触发MBS会话2或MBS会话3对应的接收端进入空闲态或RRC非激活态。
可选地，第一MBS会话的时延可以为第一MBS会话的QoS流的5QI中时延最低的时延。例如，第一MBS会话可能包括多个QoS流，不同的QoS流的5QI的取值可能是不同的，选择QoS流的5QI中时延最低的作为第一MBS会话的时延可以尽可能地保障低时延的QoS流数据可靠接收。假定，第一MBS会话包括2个QoS流，QoS流的标识分别为QoS flow1、QoS flow2。其中，针对时延，QoS flow1的5QI值为4，5QI＝4关联的时延为15ms，QoS flow2的5QI值为3，5QI＝3关联的时延为10ms，由于QoS flow2关联的时延最低，因此可将5QI＝3关联的时延作为第一MBS会话的时延。
可选地，第一MBS会话的时延是根据第一MBS会话的QoS流的5QI关联的时延确定的。例如，可将第一MBS会话的所有QoS流的5QI关联的时延进行加权计算，确定第一MBS会话的时延，如，将QoS flow1～QoS flow2的5QI关联的时延进行加和后取平均确定的值((15+10)/2)作为第一MBS会话的时延。再例如，根据不同QoS流的特征确定各QoS流的5QI关联的时延乘上不同的权重值，确定第一MBS会话的时延，本申请在此不具体限定。
本申请中，第一MBS会话的时延在接入网设备的所有MBS会话中时延最高或高于第二阈值，表征该第一MBS会话的业务需求不高或不太重要，因此本申请通过接入网设备触发接入网设备的所有MBS会话中时延最高或时延高于第二阈值的MBS会话对应的第一接收端进入空闲态或RRC非激活态，不但保证了时延要求高的业务的正常传输，还节约了接入网设备的处理资源。
情况4：第一MBS会话的参考信息包括第一MBS会话的ARP。
在情况4下，步骤204具体可通过如下两种可选的方式实现：
方式1，若第一MBS会话的ARP高于第三阈值，则接入网设备触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
例如，ARP的取值范围为1～15，1的优先级最高，15的优先级最低，例如，第三阈值的对应的ARP取值为5，第一MBS会话的ARP取值为2，由于第一MBS会话的ARP高于第三阈值，那么触发第一MBS会话对应的接收端进入空闲态或RRC非激活态。
方式2，若第一MBS会话的ARP在RAN备的所有MBS会话中ARP最高，则RAN触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
例如，若RAN的MBS会话的数目为3，MBS的会话标识分别为MBS会话1、MBS会话2以及MBS会话3，其中，MBS会话1的ARP取值为12，MBS会话2的ARP取值为10，MBS会话3的ARP取值为5，由此可知MBS会话1的ARP最低，则将MBS会话1对应的接收端进入空闲态或RRC非激活态；同时维持MBS会话2或MBS会话3对应的接收端在RRC连接态，即不触发MBS会话2或MBS会话3对应的接收端进入空闲态或RRC非激活态。
可选地，第一MBS会话的ARP可以为第一MBS会话的QoS流的ARP最低的ARP。例如，第一MBS会话可能包括多个QoS流，不同的QoS流的ARP的取值可能是不同的，选择QoS流的ARP中ARP最低的作为第一MBS会话的ARP可以尽可能地保障低ARP的QoS流数据可靠接收。假定，第一MBS会话包括2个QoS流，QoS流的标识分别为QoS flow1、QoS flow2。其中，针对ARP，QoS flow1的ARP值为4，QoS flow2的ARP值为3，由于QoS flow1的ARP最低，因此可将ARP＝4作为第一MBS会话的ARP。
可选地，第一MBS会话的ARP是根据第一MBS会话的QoS流的ARP确定的。例如，可将第一MBS会话的所有QoS流的ARP进行加权计算，确定第一MBS会话的ARP，如，将QoS flow1～QoS flow2的ARP进行加和后取平均确定的值((4+3)/2)作为第一MBS会话的ARP。再例如，根据不同QoS流的特征确定各QoS流的ARP乘上不同的权重值，确定第一MBS会话的ARP，本申请在此不具体限定。
本申请中，第一MBS会话的ARP在接入网设备的所有MBS会话中APR最低或高于第三阈值，表征第一MBS会话的业务需求不高或不太重要，因此本申请通过接入网设备触发接入网设备的所有MBS会话中ARP最高或ARP高于第三阈值的MBS会话对应的第 一接收端进入空闲态或RRC非激活态，并不会影响其他业务的执行，且还可节约接入网设备的处理资源。
情况5：第一MBS会话的参考信息包括用于指示允许处于空闲态或RRC非激活态的接收端接收第一MBS会话上的业务数据的第一指示信息。
在情况5下，步骤204具体可以包括：当第一MBS会话的参考信息包括用于指示允许处于空闲态或RRC非激活态的接收端接收第一MBS会话上的业务数据的第一指示信息时，则RAN触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
其中，该第一指示信中可包括第一MBS会话的标识，用于标识第一MBS会话。
情况6：第一MBS会话的参考信息包括用于指示允许不满足第一MBS会话的QoS需求的第二指示信息。
在情况6下，步骤204具体可以包括：当第一MBS会话的参考信息包括用于指示允许第一MBS会话的QoS不满足QoS需求的第二指示信息时，则RAN触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
其中，该第二指示信中可包括第一MBS会话的标识，用于标识第一MBS会话。
当然，在实际应用时还存在其他情况，如第一MBS会话的参考信息也可是上述6种参考信息的结合。例如，第一MBS会话的参考信息为第一MBS会话的优先级以及第一指示信息，那么RAN可触发优先级低于第一预设优先级且满足第一指示信息的第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；第一MBS会话的参考信息为第一MBS会话的优先级以及第一MBS会话的可靠性要求，那么RAN可触发优先级低于第一预设优先级且可靠性要求低于第一阈值的第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。第一MBS会话的参考信息为第一MBS会话的优先级、第一MBS会话的可靠性要以及第一指示信息，那么RAN可触发优先级低于第一预设优先级、可靠性要求低于第一阈值且满足第一指示信息需求的第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。在此仅作示例性描述，在实际应用时可能还涉及多种参考信息组合的情况，在此不一一示意。
在另一种实现方式中，上述步骤204还可以替换为：RAN根据第一MBS会话的参考信息，维持第一MBS会话对应的第一接收端处于RRC连接态，即第一接收端在RRC连接态接收第一MBS会话的业务数据。
具体地，RAN如何维持第一MBS会话对应的第一接收端处于RRC连接态可参考上述接入网设备根据第一MBS会话的参考信息6种情况中具体方式的对立实施方式，例如，在第一MBS会话的参考信息包括第一MBS会话的优先级时，第一MBS会话的优先级高于第一预设优先级，或者在接入网设备的所有MBS会话中优先级不是最低的，或者在接入网设备的所有MBS会话中优先级是最高的，则维持第一MBS会话对应的第一接收端处于RRC连接态，在此仅作示例性描述，其他方式可参考上述第一MBS会话的参考信息的对立实施方式，在此不展开说明。此外，若RAN中MBS的会话数目为3，即有3个MBS会话建立在同一个RAN上，MBS的会话标识分别为MBS会话1、MBS会话2以及MBS会话3。RAN确定维持第一MBS会话(MBS会话1)对应的第一接收端在RRC连接态，则可触发MBS会话2和MBS会话3对应的接收端进入空闲态或RRC非激活态。
需要说明的是，RAN在获取第一MBS会话的参考信息后，确定触发第一MBS会话的接收端进入空闲态或RRC非激活态之前，上述方法还可以包括：确定RAN的资源使用 情况(是否有资源剩余等)，或者MBS会话的接收端属性(是否为中继设备)等。本申请通过如下两种情况来介绍，但是实际应用时，可能是其他情况，或者下述两种情况的组合，或者是下述两种情况与其他情况的组合，本申请在此不具体限定。
情况1、RAN的资源情况
在情况1下，具体可通过如下两种可选的方式实现：
方式1、RAN确定处于RRC连接态且接收MBS会话的业务数据的终端的数量高于预设值。
方式2、RAN确定处于RRC连接态的终端的数量高于预设值。
具体地，上述两种方式中，RAN可本地预配置预设值或从网络设备获取预设值，RAN可以记录处于RRC连接态的终端的数量或者记录处于RRC连接态接收MBS会话的终端的数量，本申请在此不具体限定。
通过该方式，仅当接入网设备处于拥塞时或处理能力不足时，才会触发接收端进入空闲态或RRC非激活态；在接入网设备未处于拥塞时或处于轻载(接入的终端数量较少)时，可以支持所有接收端在RRC连接态下来接收MBS会话的业务数据，更好地满足MBS会话的业务传输性能。
情况2、第一MBS会话的接收端属性
在情况2下，具体可通过如下可选的方式实现：在步骤204之前，RAN未接收到来自SMF的第四指示信息。其中，第四指示信息可用于表示第一接收端不允许在空闲态或RRC非激活态接收第一MBS会话的业务数据，或表示第一接收端为第一MBS会话提供中继服务等。
通常，SMF可通过接收来自第一接收端的服务指示信息或第一接收端的报告，确定第四指示信息。其中，服务指示信息可指示第一接收端为第一MBS会话提供中继服务；第一接收端的报告为中继终端服务的远程终端(也即非中继终端)报告(Remote UE Report)，远程终端报告中包括远程终端的标识(Remote User ID)和远程终端的信息(Remote UE info)，SMF根据第一接收端的报告，可确定第一接收端为第一MBS会话提供中继服务。
进一步地，SMF可向RAN发送第四指示信息。若RAN接收到第四指示信息，则不触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。若RAN未接收到第四指示信息，可根据第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。例如，若RAN中第一MBS的会话的第一接收端数目为3，第一接收端的标识分别为UE1、UE2以及UE3，其中，UE1为第一MBS会话提供中继服务，UE2和UE3没有为第一MBS会话提供中继服务，则将UE2和UE3对应的接收端进入空闲态或RRC非激活态，维持UE1对应的接收端在RRC连接态接收第一MBS会话的业务数据。
若RAN的资源情况和MBS会话的接收端属性不满足上述的需求，但是第一MBS会话的参考信息符合上述6种情况的需求，接入网设备也可以不触发第一MBS会话的接收端进入空闲态或RRC非激活态，可维持第一MBS会话的接收端的RRC连接态。相应地，若第一MBS会话的参考信息不符合上述6种情况的需求，且RAN的资源情况和MBS会话的接收端属性无论是否满足，接入网设备也可不触发第一MBS会话的接收端进入空闲态或RRC非激活态，可维持第一MBS会话的接收端的RRC连接态。通过该方式，优先保障中继终端接收MBS会话的可靠性等性能，使得中继终端能够向远程终端发送正确的 MBS会话的业务数据，避免中继终端向远程终端发送错误的MBS会话的业务数据。
可选地，在上述实施例的另一种实施场景下，在步骤204中触发第一MBS会话对应的接收端进入空闲态或RRC非激活态之前，方法还可以包括：RAN确定第一接收端不存在除第一MBS会话的业务数据以外的业务数据传输，或者接入网设备确定第一接收端不存在除第一MBS会话的业务数据以外的其他业务。
具体地，RAN可以为第一接收端除第一MBS会话的业务数据以外的业务数据传输设置定时器，该定时器记录第一接收端没有除第一MBS会话的业务数据以外的业务数据传输的时间长度，当定时器到期时，RAN确定第一接收端不存在除第一MBS会话的业务数据以外的业务数据传输。
本申请中，接入网设备确定第一接收端不存在除第一MBS会话的业务数据以外的业务数据传输，能够避免影响第一接收端的其他业务数据的正常传输。
可选地，在上述实施例的另一种实施场景下，步骤204中触发第一MBS会话对应的接收端进入空闲态或RRC非激活态可以包括：根据所述第一接收端的参考信息触发第一接收端进入空闲态或RRC非激活态。
具体地，RAN还可接收来自SMF的第一接收端的参考信息，第一接收端的参考信息可指示第一接收端的特征，进一步的，还可以表示第一接收端在第一MBS中的特征，具体地，第一接收端的参考信息可以为第一接收端在第一MBS会话中的参考信息。RAN可根据第一接收端的参考信息触发第一接收端进入空闲态或RRC非激活态。
其中，第一接收端的参考信息包括以下一种或多种：第一接收端在第一MBS会话中的优先级、用于指示允许第一接收端处于空闲态或RRC非激活态接收第一MBS会话上的业务数据的第三指示信息。
需要说明的是，在实际应用时，第一接收端的参考信息中还可包括会话标识信息，该会话标识信息可指示参考信息所属或所对应的MBS会话。第一MBS会话的参考信息中还可包括其他信息，如第一MBS会话所承载的业务信息或业务类型，本申请在此不限定。该会话标识信息可以是MBS session ID，不予限制。
接入网设备可根据第一MBS会话的参考信息触发第一MBS会话对应的接收端进入空闲态或RRC非激活态，可分如下情况：
情况1：第一接收端的参考信息包括第一接收端在第一MBS会话中的优先级。
其中，第一接收端的参考信息可以用于表示第一接收端的特征。第一接收端的特征可以理解为以下信息中的至少一种：第一接收端的性能(例如，第一接收端的传输性能、可靠保障性能等)、第一接收端的需求信息(例如，第一接收端的速率需求、时延需求、可靠性需求等)、或第一接收端的优先级信息(例如，第一接收端的重要性等)等，本申请在此不具体限定。
方式1、若第一接收端的优先级低于第二预设优先级，则RAN触发第一接收端进入空闲态或RRC非激活态。
例如，协议规定优先级的数值越大优先级越小，第二预设优先级为3，第一接收端在第一MBS会话的优先级为4，由于4大于3，也即第一接收端的优先级小于第二预设优先级，那么触发第一接收端进入空闲态或RRC非激活态，在实际应用时，还可规定优先级的数值越小优先级越小，本申请在此不具体限定，可根据实际需求灵活设置。
方式2、若第一接收端的优先级在RAN的第一MBS会话对应的接收端中优先级最低， 则RAN触发第一接收端进入空闲态或RRC非激活态。第一MBS会话对应的所有接收端可以理解为：通过该接入网设备的第一MBS会话接收业务数据的所有终端，即接收该接入网设备的第一MBS会话的业务数据的所有终端，也可理解为通过该接入网设备接入第一MBS会话的所有终端，该所有终端可以指的是当前通过该接入网设备的第一MBS会话接收业务数据的所有终端。
例如，若RAN中第一MBS的会话的第一接收端数目为3，第一接收端的标识分别为UE1、UE2以及UE3，其中，UE1的优先级为1，UE2的优先级为2，UE3的优先级为5，由此可知UE3的优先级最低，若第一接收端的参考信息为UE3的，则将UE3对应的接收端进入空闲态或RRC非激活态(由于UE3的优先级最低)；若第一UE会话的参考信息不是UE3的(是UE1或UE2的)，则不将第一UE会话对应的接收端进入空闲态或RRC非激活态。
本申请中，第一MBS会话对应的所有接收端可以理解为：通过该接入网设备的第一MBS会话接收业务数据的所有终端，即接收该接入网设备的第一MBS会话的业务数据的所有终端，也可理解为通过该接入网设备接入第一MBS会话的所有终端，该所有终端可以指的是当前通过该接入网设备的第一MBS会话接收业务数据的所有终端。
本申请中，优先级越低表征该接收端的业务需求不高或不太重要，因此接入网设备触发接入网设备的第一MBS会话中优先级最低或优先级低于第二预设优先级的第一接收端进入空闲态或RRC非激活态，不但不会影响第一MBS会话对应的接收端中其他终端的业务执行，还能够节约接入网设备的处理资源。
情况2：第一接收端的参考信息包括用于指示允许第一接收端处于空闲态或RRC非激活态接收第一MBS会话上的业务数据的第三指示信息，则触发第一接收端进入空闲态或RRC非激活态。
其中，该第三指示信中还可包括第一接收端的标识。
当然，在实际应用时，第一接收端的参考信息也可是上述2种信息的结合，例如，第一接收端的参考信息为第一接收端在第一MBS会话中的优先级以及第三指示信息，那么RAN可触发优先级低于第一预设优先级且满足第三指示信息需求的第一接收端进入空闲态或RRC非激活态在此仅作示例性描述，在实际应用时可能还涉及多种信息组合的情况，在此不一一示意。
此外，第一接收端的参考信息可通过上述的MBS会话建立请求携带，还可通过上述的第一MBS会话策略信息携带，本申请在此不具体限定。此外，为了有针对性地发送或节约资源，MB-SMF也可向SMF发送部分第一接收端的参考信息，如MB-SMF向SMF发送第一接收端的参考信息之前，可接收来自SMF的第一接收端的标识信息；MB-SMF根据标识信息，向SMF发送第一接收端的参考信息。例如，SMF向MB-SMF发送第一接收端的标识UE1、UE2(实际第一MBS会话的第一接收端包括UE1、UE2、UE3以及UE4)，那么MB-SMF发送UE1和UE2的参考信息给SMF即可。通过方式可节约处理资源，避免将所有第一MBS会话的接收端的参考信息均发送至会话管理网元。
另外，第一接收端的参考信息还可从UDM获取。在第一接收端建立PDU会话过程中，SMF从UDM获取第一接收端的MBS会话签约数据(MBS subscription data)，MBS会话签约数据中包括第一接收端的参考信息，SMF可存储MBS会话签约数据，当第一接收端请求加入第一MBS会话时，SMF通过AMF向RAN发送第一接收端的参考信息。相应地，UDM获 取第一接收端的参考信息。具体地，UDM可以通过NEF从AF获取第一接收端的参考信息，或UDM从UDR获取第一接收端的参考信息。
需要指出的是，第一接收端的参考信息可以通过在MBS subscription data增加新的字段来实现，例如，该字段为表1所示的MBS subscription data中的Reference info(参考信息)。MBS subscription data具体内容如下表1所示。其中，MBS allowed(允许MBS业务)表示UE授权使用多播MBS业务，MBS Session ID(s)(MBS会话标识)表示UE允许加入的MBS会话，其中，MBS会话标识可以包括第一MBS会话的标识。Reference info(参考信息)具体可以理解为UE在每个MBS会话的参考信息，该UE在每个MBS会话的参考信息可以包括上述第一接收端的参考信息，也即第一接收端在第一MBS会话中的参考信息。该第一接收端的参考信息可以包括第一MBS会话的标识，例如，MBS session ID。
表1
Figure PCTCN2022140808-appb-000001
在另一种实现方式中，RAN还可根据第一MBS会话的第一接收端的参考信息确定第一接收端维持RRC连接态。RAN如何使用第一MBS会话的第一接收端的参考信息可参考上述方式，例如，在第一接收端的参考信息包括第一接收端在第一MBS会话中的优先级时，第一接收端的优先级高于第二预设优先级，或者接入网设备的第一MBS会话对应的接收端中优先级不是最低的，或者接入网设备的第一MBS会话对应的接收端中优先级是最高的，则维持第一MBS会话对应的第一接收端处于RRC连接态，此外，若RAN中第一MBS的会话的第一接收端数目为3，第一接收端的标识分别为UE1、UE2以及UE3。RAN确定维持第一接收端(UE1)在RRC连接态，则可触发UE2和UE3对应的接收端进入空闲态或RRC非激活态。
此外，RAN还可以确定触发第一接收端进入空闲态还是进入RRC非激活态。以第一接收端为UE为例，在为UE建立N2连接的过程中，RAN可从AMF接收到RRC非激活态辅助信息(RRC inactive assistance information)，该RRC非激活态辅助信息用于辅助RAN确定该UE是否可以进入RRC非激活态。可选地，若RAN从AMF接收到RRC非激活态辅助信息或确定在UE上下文中包括RRC非激活态辅助信息，则RAN触发UE进入RRC非激活态，否则RAN触发UE进入空闲态。
可选地，若RAN没有从AMF接收到RRC非激活态辅助信息或确定在UE上下文中不包括RRC非激活态辅助信息，RAN保持第一接收端在RRC连接态，即UE在RRC连接态接收第一MBS会话的业务数据。
可选地，RAN从AMF接收该UE是否允许进入RRC非激活态接收数据(如MBS业务的数据)或该UE是否有能力进入RRC非激活态接收数据(如MBS业务的数据)的指示信息，若该UE被允许进入RRC非激活态接收数据或该UE有能力进入RRC非激活态接收数据，则RAN确定触发UE进入RRC非激活态，否则RAN确定触发UE进入空闲态。其中，AMF可从UDM或SMF获取该UE是否允许进入RRC非激活态接收数据的指示信息，或者，AMF可从UE获取该UE是否有能力进入RRC非激活态接收数据的指示信息。
参阅图3，示出了另一种通信方法，该方法中RAN根据第一MBS会话的参考信息触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，图3以第一MBS会话的第一接收端为UE1为例进行描述，图3为UE1、RAN、SMF、MB-SMF、PCF以及AF的交互示意图，如下所述：
步骤301，AF向MB-SMF发送MBS会话建立请求消息。
其中，该MBS会话建立请求信息中可以包括第一MBS会话的参考信息以及第一MBS会话的标识。第一MBS会话的标识用于标识该MBS会话，例如，临时移动组标识(temporary mobile group identifier，TMGI)。
步骤302，PCF向MB-SMF发送第一MBS会话策略信息。
其中，第一MBS会话策略信息包括第一MBS会话的参考信息以及第一MBS会话的标识。
在此，第一MBS会话的参考信息可参照上文第一MBS会话的参考信息的描述，在此不赘述。
需要指出的是，上述步骤301和步骤302为可选步骤，例如，可都执行，且在执行顺序上不区分先后，也可择一执行不予限制。
在步骤301和步骤302都执行时，MB-SMF可根据MBS会话建立请求消息以及第一MBS会话策略信息中的第一MBS会话的QoS信息确定第一MBS会话的参考信息，例如，若MB-SMF根据MBS会话建立请求消息中的第一MBS会话的QoS信息确定的第一MBS会话的参考信息1，MB-SMF根据第一MBS会话策略信息中的第一MBS会话的QoS信息确定的第一MBS会话的参考信息2，其中，第一MBS会话的参考信息1与第一MBS会话的参考信息2不一致，MB-SMF可将第一MBS会话的参考信息2作为第一MBS会话的参考信息。
步骤303，UE1向SMF发送用于请求加入第一MBS会话的请求消息。
其中，该请求消息携带第一MBS会话的标识和加入第一MBS会话指示信息，具体地，该请求消息可以为会话修改请求消息。
具体地，UE1可通过AMF向SMF发送用于请求加入第一MBS会话的请求消息。
步骤304，SMF向MB-SMF发送用于获取第一MBS会话的上下文信息的请求消息。
其中，具体地，该请求消息可以为第一MBS会话上下文获取请求消息。
步骤305，MB-SMF向SMF发送第一MBS会话的上下文信息，其中，该第一MBS会话的上下文信息包括第一MBS会话的参考信息。相应地，SMF可从第一MBS会话的上下文信息获取第一MBS会话的参考信息。
步骤306，SMF向RAN发送第一MBS会话的参考信息。
具体地，步骤306中的参考信息可通过N2info发送，还可通过其他消息发送，在此不限定。
步骤307，RAN根据第一MBS会话的参考信息，触发UE1进入空闲态或RRC非激活态。
具体地，步骤307可参考上述图2的步骤204的相关描述，触发UE1进入空闲态或RRC非激活态，在此不赘述。
可选地，在图3所示实施例的基础上，上述步骤307可以替换为：RAN根据第一MBS会话的参考信息，维持UE1处于RRC连接态，即UE1在RRC连接态接收第一MBS会话的业务数据。
具体地，RAN如何维持第一接收端处于RRC连接态可参考上述图2的步骤204的相关描述，例如，接入网设备根据第一MBS会话的参考信息，触发维持UE1处于RRC连接态，不再赘述。
步骤308，UE1进入空闲态或RRC非激活态。
进一步地，UE1进入空闲态或RRC非激活态，并在空闲态或RRC非激活态下接收第一MBS会话的业务数据。
其中，UE1可以根据步骤307中RAN的触发进入空闲态或RRC非激活态，具体可以参考上文中的相关描述，不再赘述。
采用图3提供的方法，RAN可根据第一MBS会话的参考信息触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，避免RAN长期占用用于维护第一MBS会话的接收端处于RRC连接态的处理资源，进一步地可节约RAN的处理资源。
参阅图4，示出了另一种通信方法，该方法中RAN根据第一MBS会话的接收端的参考信息触发某个接收端进入空闲态或RRC非激活态，具体可参阅图4，图4以第一接收端为UE1为例，图4为UE1、RAN、SMF、MB-SMF、PCF以及AF的交互示意图，如下所述：
步骤401，AF向MB-SMF发送MBS会话建立请求消息。
其中，该MBS会话建立请求信息可以包括第一MBS会话的接收端的参考信息以及第一MBS会话的接收端的标识。接收端的标识用于标识该接收端，例如，临时移动用户识别码(temporary mobile subscriber identity，TMSI)。
步骤402，PCF向MB-SMF发送第一MBS会话策略信息。
其中，第一MBS会话策略信息包括第一MBS会话的接收端的参考信息以及第一MBS会话的接收端的标识。
可选的，SMF还可以从UDM获取第一MBS会话的接收端的参考信息，该参考信息可以是由AF向UDM提供的。
在此，接收端的参考信息可参照上文第一接收端的参考信息的描述，在此不赘述。
需要指出的是，上述步骤401和步骤402为可选步骤，例如，可都执行，且在执行顺序上不区分先后，也可择一执行不予限制。
步骤403，UE1向SMF发送用于请求加入第一MBS会话的请求消息。
其中，该请求消息包括第一MBS会话的标识和加入第一MBS会话指示信息，具体地， 该请求消息可以为会话修改请求消息。
步骤404，SMF向MB-SMF发送用于获取第一MBS会话的上下文信息的请求消息。
其中，第一MBS会话的上下文信息包括第一MBS会话的接收端的参考信息。
其中，该请求消息具体可以为第一MBS会话的上下文请求消息。该请求消息可携带第一MBS会话的接收端的标识，如UE1的标识，那么MB-SMF可将UE1的参考信息发送给SMF，若该请求消息中不携带第一MBS会话的接收端的标识，那么MB-SMF将第一MBS会话的所有接收端的参考信息发送给SMF。
步骤405，MB-SMF向SMF发送第一MBS会话的上下文信息，其中，该第一MBS会话的上下文信息包括第一MBS会话的接收端的参考信息。相应地，SMF可从第一MBS会话的上下文信息获取第一MBS会话的接收端的参考信息。
步骤406，SMF向RAN发送第一MBS会话的接收端的参考信息。
例如，该参考信息可通过N2info发送，还可通过其他消息发送，在此不限定。
步骤407，RAN根据第一MBS会话的接收端的参考信息，触发UE1进入空闲态或RRC非激活态。
具体地，步骤407可参考上述图2的步骤204的相关描述，触发UE1进入空闲态或RRC非激活态，在此不赘述。
可选地，在图4所示实施例的基础上，上述步骤407还可以替换为：RAN根据第一MBS会话的UE1的参考信息，确定UE1维持RRC连接态。具体可参照上文描述，在此不赘述。
步骤408，UE1进入空闲态或RRC非激活态。
具体地，UE1进入空闲态或RRC非激活态，并在空闲态或RRC非激活态下接收第一MBS会话的业务数据。
其中，UE1可以根据步骤407中RAN的触发进入空闲态或RRC非激活态，具体可以参考上文中的相关描述，不再赘述。
本申请基于第一MBS会话的接收端的触发第一接收端进入空闲态或RRC非激活态，能够保证高优先级的接收端正常接收第一MBS会话的业务数据。
图5示出了本申请中另一种通信方法，该方法以第一接收端为UE，且该UE为第一MBS会话提供中继服务为例，图5为UE、RAN、SMF之间的交互示意图，如下所述：
步骤501，UE向SMF发送服务指示信息。
其中，该服务指示信息可以在UE请求加入第一MBS会话时发送，例如，服务指示信息携带在用于请求加入第一MBS会话的请求消息中，也可以通过其它消息或流程发送，例如，UE通过MBS会话修改流程向SMF发送该服务指示信息。
具体地，该服务指示信息可以用于指示该UE为第一MBS会话提供中继服务。
其中，该UE为第一MBS会话提供中继服务可以指的是远程UE可以通过该UE接收第一MBS会话的业务数据。
步骤502，UE向SMF发送远程UE报告(例如，Remote UE Report)。
其中，远程UE报告可以包括远程UE的标识(例如，Remote User ID)和远程UE的信息(例如，Remote UE info)，远程UE的信息可以是该UE为远程UE分配的用于网络侧通信的地址信息。
需要指出的是，上述步骤501和步骤502为可选步骤，例如，可都执行，且在执行顺序上不区分先后，也可择一执行不予限制。
步骤503，SMF确定该UE为第一MBS会话提供中继服务。
其中，步骤503可采用如下方式实现：
方式1：SMF根据步骤501中的服务指示信息确定该UE为第一MBS会话提供中继服务。例如，服务指示信息为该UE提供中继服务的信息，SMF根据该服务指示信息确定该UE为第一MBS会话提供中继服务。
方式2：SMF根据步骤502中的远程UE报告确定该UE为第一MBS会话提供中继服务。例如，远程UE报告中包括远程UE的标识和远程UE的信息，SMF根据远程UE报告确定该UE为第一MBS会话提供中继服务。
步骤504，SMF通知RAN：不允许该UE在空闲态接收第一MBS会话的业务数据，或该UE为第一MBS会话提供中继服务。
步骤504中SMF可以通过N2信息通知RAN，例如，N2信息包括通知信息或通知消息，以通知RAN：不允许该UE在空闲态接收第一MBS会话的业务数据，或该UE为第一MBS会话提供中继服务。
进一步地，针对层3中继的场景，可以通过执行步骤501-503，来确定该UE为第一MBS会话的业务数据提供中继服务，并通过步骤504来通知RAN；针对层2中继的场景，可以不执行步骤501-504，而是通过执行步骤505由RAN来确定该UE为第一MBS会话的业务数据提供中继服务。在图5中，针对层2中继的场景，执行的步骤通过实线示意，针对层3中继的场景，执行的步骤通过虚线示意，针对层2中继和层3中继的场景中，均可执行的步骤通过粗实线示意。
步骤505，RAN通过第一MBS会话的业务数据的传输情况，确定该UE为第一MBS会话提供中继服务。
对于层2中继的场景，第一MBS会话的业务数据的传输情况可理解为第一MBS会话的业务数据通过该UE发送给远程UE。具体地，RAN根据远程UE与该UE之间的连接信息将第一MBS会话的业务数据通过该UE发送给远程UE。远程UE与该UE之间的连接信息可以理解为远程UE通过该UE接入RAN的连接信息，该连接信息可通过远程UE发送RRC请求消息确定。具体地，在步骤505之前，远程UE通过该UE向RAN发送RRC请求消息，RAN可以知晓该UE是为远程UE提供中继服务。RAN知晓该UE为远程UE提供中继服务，且向远程UE传输第一MBS会话的业务数据，因此RAN可知晓该UE为第一MBS会话提供中继服务。
步骤506，RAN确定该UE维持为RRC连接态。
具体地，对于层3中继，RAN根据N2信息中不允许该UE在空闲态接收第一MBS会话的业务数据或该UE正在提供中继服务，确定该UE维持为RRC连接态。对于层2中继，RAN根据步骤505确定该UE为第一MBS会话提供中继服务，进而确定该UE维持为RRC连接态。此外，对于层2中继，即使RAN确定该UE服务的所有远程UE均进入空闲态后，UE仍然处于RRC连接态。
例如，若RAN中第一MBS的会话的第一接收端数目为3，第一接收端的标识分别为UE1、UE2以及UE3，其中，UE1(作为层3中继或层2中继)为第一MBS会话提供中继服务，UE2和UE3没有为第一MBS会话提供中继服务，则RAN触发UE2和UE3对应的 接收端进入空闲态或RRC非激活态，维持UE1对应的接收端在RRC连接态接收第一MBS会话的业务数据。
上述的图5所述的实施例可以在图2～图3的实施例的步骤204、步骤307以及步骤407之前执行，图5所述的实施例可以理解为RAN触发第一MBS会话的第一接收端为空闲态或RRC非激活态的进一步判别条件，以触发第一MBS会话的第一接收端进入合适的状态，保证通信传输的可靠性。
通过该方法，可优先保障中继UE接收MBS会话的可靠性等性能，使得中继终端能够向远程UE发送正确的MBS会话的业务数据，避免中继UE向远程UE发送错误的MBS会话的业务数据。
参阅图6，示出了另一种通信方法，该方法应用于共享隧道的建立流程，该共享隧道建立在RAN与UPF之间，用于传输第一MBS会话的数据。该UPF可以为多播UPF。RAN根据第一MBS会话的参考信息触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，具体可参阅图6，图6以第一接收端为UE1为例，图6为UE1、RAN、SMF、AMF、NRF以及MB-SMF的交互示意图，如下所述：
步骤601，UE1通过AMF向SMF发送用于请求加入第一MBS会话的请求消息。
其中，该请求消息包括第一MBS会话的标识和加入第一MBS会话指示信息，具体地，该请求消息可以为会话修改请求消息，例如PDU会话修改请求。
步骤602，SMF从NRF获取为第一MBS会话提供服务的MB-SMF信息。
其中，NRF中可以存储多个MB-SMF信息，该MB-SMF信息可以是MB-SMF的标识，例如，name，ID，或地址，不予限制。
步骤603，SMF向MB-SMF发送用于获取第一MBS会话的上下文信息的请求消息。
其中，第一MBS会话的上下文信息包括第一MBS会话的参考信息。其中，参考信息可以参考前述实施例中的相关描述，不再赘述。
其中，该请求消息具体可以为第一MBS会话的上下文请求消息。
示例性的，该请求消息可携带第一MBS会话的接收端的标识，如UE1的标识，那么MB-SMF可将UE1的参考信息发送给SMF，若该请求消息中不携带第一MBS会话的接收端的标识，那么MB-SMF将第一MBS会话的所有接收端的参考信息发送给SMF。
步骤604，MB-SMF向SMF发送第一MBS会话的上下文信息。
其中，该第一MBS会话的上下文信息可以包括第一MBS会话的接收端的参考信息。
相应地，SMF可从第一MBS会话的上下文信息获取第一MBS会话的接收端的参考信息。
步骤605，SMF确定UE1是否被授权使用第一MBS业务。
具体地，上述步骤605可以替换为SMF确定UE1是否被授权接收第一MBS业务。若UE1被授权使用第一MBS业务可执行步骤606，若UE1未被授权使用第一MBS业务，SMF则通过AMF发送拒绝UE1加入第一MBS会话的响应消息，图6中不作示意。
其中，SMF可根据UDM存储的MBS会话的签约数据，确定UE1是否被授权使用第一MBS业务。MBS会话的签约数据包括的信息可如上述表1所示，MBS allowed、MBS Session ID(s)以及Reference info。SMF根据MBS allowed可以确定UE1是否被授权使用MBS业务，在UE1被授权使用MBS业务的情况下，根据MBS Session ID(s)可以获悉UE1被授权加入的MBS会话的标识，通常UE1被授权加入的MBS会话的标识可能包括多个， 若该MBS会话的标识中包括第一MBS会话的标识，SMF则确定UE1被授权使用第一MBS业务。
需要说明的是，步骤602～步骤605为可选步骤。
步骤606，若SMF接收UE1加入第一MBS会话的请求，则向AMF发送N2会话管理信息(n2 session management information，N2 SM info)。
其中，N2 SM info消息中包括第一MBS会话的标识，该第一MBS会话的标识可以用于RAN确定第一MBS会话的上下文信息。
步骤607，AMF向RAN发送N2 SM info。
若第一MBS会话的共享隧道尚未建立，上述方法还可以包括如下步骤608～步骤611，用于建立第一MBS会话共享隧道。
在建立第一MBS会话的共享隧道的流程中，MB-SMF可以将第一MBS会话的参考信息通过AMF发送给RAN。
步骤608，RAN向AMF发送N2 MBS Session request(N2 MBS会话请求)消息。
其中，N2 MBS Session request消息可以包括：第一MBS会话的标识以及RAN为第一MBS会话分配的下行隧道信息(DL tunnel Info)，该DL tunnel Info可以理解为第一MBS会话的共享隧道的下行隧道信息。
步骤609，AMF向MB-SMF发送第一MBS会话的上下文更新请求消息。
其中，第一MBS会话的上下文更新请求消息可以包括：第一MBS会话的标识和上述DL tunnel Info。
步骤610，MB-SMF向AMF发送第一MBS会话上下文更新响应消息。
其中，第一MBS会话上下文更新响应消息包括第一MBS会话的参考信息，可以参考前述相关描述，不再赘述。
具体地，第一MBS会话上下文更新响应消息中包括N2 SM info，N2 SM info可以包括第一MBS会话的参考信息。
其中，MB-SMF可参考图3中步骤301或步骤302获取第一MBS会话的参考信息。
步骤611，AMF向RAN发送第一MBS会话的参考信息。
可选地，AMF通过步骤610接收第一MBS会话的参考信息后，AMF先判断是否已经向RAN发送RRC非激活态辅助信息(RRC inactive assistance information)，若已经发送RRC非激活态辅助信息，则AMF向RAN发送第一MBS会话的参考信息；若没有发送RRC非激活态辅助信息，则AMF不向RAN发送第一MBS会话的参考信息。其中，RRC非激活态辅助信息用于辅助RAN确定UE是否可以进入RRC非激活态。
可选地，AMF在步骤609中还可向MB-SMF发送AMF是否已发送RRC非激活态辅助信息的指示信息，MB-SMF根据该指示信息确定是否在步骤610中发送第一MBS会话的参考信息。若指示信息指示AMF已发送RRC非激活态辅助信息，则MB-SMF向AMF发送第一MBS会话的参考信息；若指示信息指示AMF未发送RRC非激活态辅助信息，则MB-SMF不向AMF发送第一MBS会话的参考信息。也即，当RAN获取RRC非激活态辅助信息，该UE1才能进入RRC非激活态。因此，当AMF/MB-SMF获知RAN没有获得RRC非激活态辅助信息的情况下，就无需发送第一MBS会话的参考信息。
步骤612，RAN根据第一MBS会话的参考信息，触发UE1进入空闲态或RRC非激活态。
其中，该触发可以通过发送通知消息给UE1，以使得UE1进入空闲态或RRC非激活态。
步骤613，UE1进入空闲态或RRC非激活态。
具体地，步骤612可参考上述图2的步骤204的相关描述，触发UE1进入空闲态或RRC非激活态，在此不赘述。
需要说明的是，在共享隧道的建立流程中，MB-SMF通过AMF向RAN发送第一MBS会话的参考信息，其中，第一MBS会话的参考信息只需要发送一次，并且RAN只存储一份第一MBS会话的参考信息，避免出现在每个UE加入第一MBS会话时，SMF都要通过AMF向RAN发送该第一MBS会话的参考信息的情况，减小信令开销。此外，图6的示例中，RAN也无需在每个加入第一MBS会话的UE的上下文都存储第一MBS会话的参考信息，降低了RAN的存储空间占用。
本申请在第一MBS会话共享隧道建立后，基于第一MBS会话的参考信息的触发第一接收端进入空闲态或RRC非激活态，能够保证高优先级的接收端正常接收第一MBS会话的业务数据，采用共享隧道传输第一MBS会话的业务数据节省了传输资源。
上述主要从设备交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，为了实现上述功能，各个设备可以包括执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请的实施例能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对设备进行功能单元的划分，例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
在采用集成的单元的情况下，图7示出了本申请实施例中所涉及的通信装置的可能的示例性框图。如图7所示，通信装置700可以包括：处理单元701和收发单元702。处理单元701用于对通信装置700的动作进行控制管理。收发单元702用于支持通信装置700与其他设备的通信。可选地，收发单元702可以包括接收单元和/或发送单元，分别用于执行接收和发送操作。可选的，通信装置700还可以包括存储单元，用于存储通信装置700的程序代码和/或数据。所述收发单元可以称为输入输出单元、通信单元等，所述收发单元可以是收发器；所述处理单元可以是处理器。当通信装置是通信设备中的模块(如，芯片)时，所述收发单元可以是输入输出接口、输入输出电路或输入输出管脚等，也可以称为接口、通信接口或接口电路等；所述处理单元可以是处理器、处理电路或逻辑电路等。具体地，该装置可以为上述的接入网设备、多播/广播会话管理网元以及会话管理网元等。
在一个实施例中，收发单元702可用于接收来自会话管理网元或接入与移动管理网元的第一MBS会话的参考信息，第一MBS会话的参考信息用于表示第一MBS会话的特征；处理单元701，可用于根据第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或无线资源控制RRC非激活态。
在一种可选的方式中，第一MBS会话的参考信息包括以下一种或多种：第一MBS会话的优先级、第一MBS会话的可靠性要求、第一MBS会话的时延、第一MBS会话的ARP、 用于指示允许处于空闲态或RRC非激活态的接收端接收第一MBS会话的业务数据的第一指示信息、用于指示允许不满足第一MBS会话的QoS需求的第二指示信息；其中，第一MBS会话的可靠性要求为第一MBS会话的QoS流的5QI中可靠性要求最高的可靠性要求；第一MBS会话的时延为第一MBS会话的QoS流的5QI中时延最低的时延；第一MBS会话的ARP为第一MBS会话的QoS流的ARP最低的ARP。
在一种可选的方式中，当第一MBS会话的参考信息包括第一MBS的优先级时，处理单元701具体用于执行如下操作：
若第一MBS会话的优先级低于第一预设优先级，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，若第一MBS会话的优先级在接入网设备的所有MBS会话中优先级最低，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
在一种可选的方式中，当第一MBS会话的参考信息包括第一MBS会话的可靠性要求时，处理单元701具体用于执行如下操作：
若第一MBS会话的可靠性要求低于第一阈值，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，若第一MBS会话的可靠性要求在接入网设备的所有MBS会话中可靠性要求最低，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
在一种可选的方式中，当第一MBS会话的参考信息包括第一MBS会话的时延时，处理单元701具体用于执行如下操作：
若第一MBS会话的时延高于第二阈值，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，若第一MBS会话的时延在接入网设备的所有MBS会话中时延最高，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
在一种可选的方式中，当第一MBS会话的参考信息包括第一MBS会话的ARP时，处理单元701具体用于执行如下操作：
若第一MBS会话的ARP高于第三阈值，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，若第一MBS会话的ARP在接入网设备的所有MBS中ARP最高，则触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
在一种可选的方式中，第一接收端为第一MBS会话对应的接收端中的一个或多个。
在一种可选的方式中，处理单元701具体用于确定第一接收端不存在除第一MBS会话的业务数据以外的业务数据传输。
在一种可选的方式中，收发单元702还用于接收来自会话管理网元或统一数据管理网元的第一接收端的参考信息，第一接收端的参考信息包括以下一种或多种：第一接收端在第一MBS会话中的优先级、用于指示允许第一接收端处于空闲态或RRC非激活态接收第一MBS会话的业务数据的第三指示信息；处理单元701还用于根据第一接收端的参考信息触发第一接收端进入空闲态或RRC非激活态。
在一种可选的方式中，当第一接收端的参考信息包括第一接收端在第一MBS会话中的优先级时，处理单元701还用于执行如下操作：
若第一接收端在第一MBS会话中的优先级低于第二预设优先级，则触发第一接收端进入空闲态或RRC非激活态；或，若第一接收端在第一MBS会话中的优先级在第一MBS会话对应的所有接收端中优先级最低，则触发第一接收端进入空闲态或RRC非激活态。
在一种可选的方式中，处理单元701用于根据第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态之前，处理单元701还用于确定处于RRC连接态且接收MBS会话的业务数据的终端的数量高于预设值；或者，接入网设备确定处于RRC连接态的终端的数量高于预设值。
在一种可选的方式中，在一种可选的方式中，根据第一MBS会话的参考信息，触发第一MBS会话对应的第一接收端进入空闲态或RRC非激活态之前，处理单元701还用于确定未接收到第四指示信息，第四指示信息用于表示第一接收端不允许在空闲态或RRC非激活态接收第一MBS会话的业务数据，或表示第一接收端为第一MBS会话提供中继服务。
在一个实施例中，处理单元701可用于获取第一MBS会话的参考信息，第一MBS会话的参考信息用于表示第一MBS会话的特征；收发单元702可用于向会话管理网元或接入与移动管理网元发送第一MBS会话的参考信息。
在一种可选的方式中，第一MBS会话的参考信息包括以下一种或多种：第一MBS会话的优先级、第一MBS会话的可靠性要求、第一MBS会话的时延、第一MBS会话的ARP、用于指示允许处于空闲态或RRC非激活态的接收端接收第一MBS会话的业务数据的第一指示信息、用于指示允许不满足第一MBS会话的QoS的第二指示信息；其中，第一MBS会话的可靠性要求为第一MBS会话的QoS流的5QI中可靠性要求最高的可靠性要求；第一MBS会话的时延为第一MBS会话的QoS流的5QI中时延最低的时延；第一MBS会话的ARP为第一MBS会话的QoS流的ARP中最低的ARP。
在一种可选的方式中，收发单元702，还用于接收MBS会话建立请求，MBS会话建立请求包括第一MBS会话的参考信息；或，接收来自策略管理网元的第一MBS会话策略信息，第一MBS会话策略信息包括第一MBS会话的参考信息；或，接收来自应用功能或策略管理网元的第一MBS会话的QoS信息，以使处理单元701根据第一MBS会话的QoS信息确定第一MBS会话的参考信息。
在一种可选的方式中，MBS会话建立请求携带第一接收端的参考信息，或，第一MBS会话策略信息包括第一接收端的参考信息；其中，第一接收端为第一MBS会话对应的接收端中的一个或多个。
在一种可选的方式中，第一接收端的参考信息包括以下一种或多种：第一接收端在第一MBS会话中的优先级、用于指示允许第一接收端处于空闲态或RRC非激活态接收第一MBS会话上的业务数据的第三指示信息。
在一种可选的方式中，收发单元702，还用于接收来自会话管理网元的第一接收端的标识信息；处理单元701，还用于根据标识信息，向会话管理网元发送第一接收端的参考信息。
在一个实施例中，收发单元702可用于接收来自会话管理网元的第一MBS会话的第一接收端的参考信息，第一接收端的参考信息用于表示第一接收端的特征；处理单元701，可用于根据第一接收端的参考信息，触发第一接收端进入空闲态或无线资源控制RRC非激活态。
在一种可选的方式中，第一接收端的参考信息包括下一种或多种：第一接收端在第一MBS会话中的优先级、用于指示允许第一接收端处于空闲态或RRC非激活态接收第一MBS会话上的业务数据的第三指示信息。
在一种可选的方式中，当第一接收端的参考信息包括第一接收端在第一MBS会话中的优先级时，处理单元701还用于执行如下操作：
若第一接收端在第一MBS会话中的优先级低于第二预设优先级，则触发第一接收端进入空闲态或RRC非激活态；或，若第一接收端在第一MBS会话中的优先级在第一MBS会话对应的所有接收端中优先级最低，则触发第一接收端进入空闲态或RRC非激活态。
在一种可选的方式中，处理单元701触发第一接收端进入空闲态或RRC非激活态之前，处理单元701还用于确定第一接收端不存在除第一MBS会话的业务数据以外的业务数据传输。
在一种可选的方式中，处理单元701根据第一接收端的参考信息，触发第一接收端进入空闲态或无线资源控制RRC非激活态之前，处理单元701还用于确定处于RRC连接态且接收MBS会话的业务数据的终端的数量高于预设值；或者，确定处于RRC连接态的终端的数量高于预设值。
在一个实施例中，处理单元701可用于获取第一MBS会话的第一接收端的参考信息，第一接收端的参考信息用于表示第一接收端的特征；收发单元702用于向会话管理网元发送第一MBS会话的第一接收端的参考信息。
在一种可选的方式中，第一接收端的参考信息包括下一种或多种：第一接收端在第一MBS会话中的优先级、用于指示允许第一接收端处于空闲态或RRC非激活态接收第一MBS会话上的业务数据的第三指示信息。
在一种可选的方式中，收发单元702还用于接收MBS会话建立请求，MBS会话建立请求包括第一MBS会话的第一接收端的参考信息；或，接收来自策略管理网元的第一MBS会话策略信息，第一MBS会话策略信息包括第一MBS会话的第一接收端的参考信息。
在一种可选的方式中，收发单元702还用于接收来自会话管理网元的第一接收端的标识信息；处理单元701还用于根据标识信息，向会话管理网元发送第一接收端的参考信息。
如图8所示，为本申请还提供的一种通信装置800。通信装置800可以是芯片或芯片系统。该通信装置可以位于上述任一方法实施例所涉及的设备中，例如接入网设备，或SMF等，以执行该设备所对应的动作。
可选的，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
通信装置800包括处理器810。
处理器810，用于执行存储器820中存储的计算机程序，以实现上述任一方法实施例中各个设备的动作。
通信装置800还可以包括存储器820，用于存储计算机程序。
可选地，存储器820和处理器810之间耦合。耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。可选的，存储器820与处理器810集成在一起。
其中，处理器810和存储器820均可以为一个或多个，不予限制。
可选的，在实际应用中，通信装置800中可以包括收发器830，也可不包括收发器830，图中以虚线框来示意，通信装置800可以通过收发器830和其它设备进行信息交互。收发器830可以是电路、总线、收发器或者其它任意可以用于进行信息交互的装置。
在一种可能的实施方式中，该通信装置800可以为上述各方法实施中的接入网设备，或会话管理网元，或多播/广播会话管理网元。
本申请实施例中不限定上述收发器830、处理器810以及存储器820之间的具体连接介质。本申请实施例在图8中以存储器820、处理器810以及收发器830之间通过总线连接，总线在图8中以粗线表示，其它部件之间的连接方式，仅是进行示意性说明，并不引以为限。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图8中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。在本申请实施例中，处理器可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实施或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
在本申请实施例中，存储器可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。存储器还可以是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实施存储功能的装置，用于存储计算机程序、程序指令和/或数据。
基于以上实施例，参见图9，本申请实施例还提供另一种通信装置900，包括：接口电路910和逻辑电路920；接口电路910，可以理解为输入输出接口，可用于执行上述任一方法实施例中各个设备的收发步骤，例如上述步骤203，SMF向RAN发送第一MBS会话的参考信息中的发送步骤；逻辑电路920可用于运行代码或指令以执行上述任一实施例中各个设备执行的方法，不再赘述。
基于以上实施例，本申请实施例还提供一种计算机可读存储介质，该计算机可读存储介质存储有指令，当所述指令被执行时，使上述任一方法实施例中各个设备执行的方法被实施，例如，使得图2所示实施例中RAN或MB-SMF或SMF执行的方法被实施。该计算机可读存储介质可以包括：U盘、移动硬盘、只读存储器、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。
基于以上实施例，本申请实施例提供一种通信系统，该通信系统包括上述任一方法实施例中提及的接入网设备(例如RAN)、会话管理网元(例如SMF)以及多播/广播会话管理网元(例如MB-SMF)，可用于执行上述任一方法实施例中各个设备执行的方法。
此外，上述通信系统还可以包括终端设备(例如UE，或第一接收端)，该终端设备可通过与接入网设备、会话管理网元进行数据交互，以执行上述任一方法实施例中的相关方法。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、装置(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指 令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理装置的处理器以产生一个机器，使得通过计算机或其他可编程数据处理装置的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理装置以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理装置上，使得在计算机或其他可编程装置上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程装置上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。

Claims (62)

  1. 一种通信方法，其特征在于，包括：
    接入网设备接收来自会话管理网元或接入与移动管理网元的第一多播/广播业务MBS会话的参考信息，所述第一MBS会话的参考信息用于表示所述第一MBS会话的特征；
    所述接入网设备根据所述第一MBS会话的参考信息，触发所述第一MBS会话对应的第一接收端进入空闲态或无线资源控制RRC非激活态。
  2. 根据权利要求1所述的方法，其特征在于，所述第一MBS会话的参考信息包括以下一种或多种：所述第一MBS会话的优先级、所述第一MBS会话的可靠性要求、所述第一MBS会话的时延、所述第一MBS会话的分配保持优先级ARP、用于指示允许处于空闲态或RRC非激活态的接收端接收所述第一MBS会话的业务数据的第一指示信息、用于指示允许不满足所述第一MBS会话的服务质量QoS需求的第二指示信息；
    其中，所述第一MBS会话的可靠性要求为所述第一MBS会话的QoS流的第5代5G QoS指示符5QI中可靠性要求最高的可靠性要求；所述第一MBS会话的时延为所述第一MBS会话的QoS流的5QI中时延最低的时延；所述第一MBS会话的ARP为所述第一MBS会话的QoS流的ARP中最低的ARP。
  3. 根据权利要求2所述的方法，其特征在于，当所述第一MBS会话的参考信息包括所述第一MBS的优先级时，所述接入网设备根据所述第一MBS会话的参考信息，触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，包括：
    若所述第一MBS会话的优先级低于第一预设优先级，则所述接入网设备触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，
    若所述第一MBS会话的优先级在所述接入网设备的所有MBS会话中优先级最低，则所述接入网设备触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
  4. 根据权利要求2或3所述的方法，其特征在于，当所述第一MBS会话的参考信息包括所述第一MBS会话的可靠性要求时，所述接入网设备根据所述第一MBS会话的参考信息，触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，包括：
    若所述第一MBS会话的可靠性要求低于第一阈值，则所述接入网设备触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，
    若所述第一MBS会话的可靠性要求在所述接入网设备的所有MBS会话中可靠性要求最低，则所述接入网设备触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
  5. 根据权利要求2-4中任一所述的方法，其特征在于，当所述第一MBS会话的参考信息包括所述第一MBS会话的时延时，所述接入网设备根据所述第一MBS会话的参考信息，触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，包括：
    若所述第一MBS会话的时延高于第二阈值，则所述接入网设备触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，
    若所述第一MBS会话的时延在所述接入网设备的所有MBS会话中时延最高，则所述接入网设备触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
  6. 根据权利要求2-5中任一所述的方法，其特征在于，当所述第一MBS会话的参考信息包括所述第一MBS会话的ARP时，所述接入网设备根据所述第一MBS会话的参考信 息，触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态，包括：
    若所述第一MBS会话的ARP高于第三阈值，则所述接入网设备触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，
    若所述第一MBS会话的ARP在所述接入网设备的所有MBS中ARP最高，则所述接入网设备触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
  7. 根据权利要求1-6中任一所述的方法，其特征在于，所述第一接收端为所述第一MBS会话对应的接收端中的一个或多个。
  8. 根据权利要求1-7中任一所述的方法，其特征在于，所述触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态之前，所述方法还包括：
    所述接入网设备确定所述第一接收端不存在除所述第一MBS会话的业务数据以外的业务数据传输。
  9. 根据权利要求7或8所述的方法，其特征在于，所述方法还包括：
    所述接入网设备接收来自所述会话管理网元的所述第一接收端的参考信息，所述第一接收端的参考信息包括以下一种或多种：所述第一接收端在所述第一MBS会话中的优先级、用于指示允许所述第一接收端处于空闲态或RRC非激活态接收所述第一MBS会话的业务数据的第三指示信息；
    所述触发所述第一MBS会话对应的第一接收端进入空闲态或无线资源控制RRC非激活态，包括：
    所述接入网设备根据所述第一接收端的参考信息触发所述第一接收端进入空闲态或RRC非激活态。
  10. 根据权利要求9所述的方法，其特征在于，当所述第一接收端的参考信息包括所述第一接收端在所述第一MBS会话中的优先级时，所述接入网设备根据所述第一接收端的参考信息触发所述第一接收端进入空闲态或RRC非激活态，包括：
    若所述第一接收端在所述第一MBS会话中的优先级低于第二预设优先级，则所述接入网设备触发所述第一接收端进入空闲态或RRC非激活态；或，
    若所述第一接收端在所述第一MBS会话中的优先级在所述第一MBS会话对应的所有接收端中最低，则所述接入网设备触发所述第一接收端进入空闲态或RRC非激活态。
  11. 根据权利要求1-10中任一所述的方法，其特征在于，所述接入网设备根据所述第一MBS会话的参考信息，触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态之前，所述方法还包括：
    所述接入网设备确定处于RRC连接态且接收MBS会话的业务数据的终端的数量高于预设值；或者，
    所述接入网设备确定处于RRC连接态的终端的数量高于预设值。
  12. 根据权利要求1-11中任一所述的方法，其特征在于，所述接入网设备根据所述第一MBS会话的参考信息，触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态之前，所述方法还包括：
    所述接入网设备未接收到第四指示信息，所述第四指示信息用于表示所述第一接收端不允许在空闲态或RRC非激活态接收所述第一MBS会话的业务数据，或表示所述第一接收端为所述第一MBS会话提供中继服务。
  13. 一种通信方法，其特征在于，包括：
    多播/广播会话管理网元获取第一多播/广播业务MBS会话的参考信息，所述第一MBS会话的参考信息用于表示所述第一MBS会话的特征；
    所述多播/广播会话管理网元向会话管理网元或接入与移动管理网元发送所述第一MBS会话的参考信息。
  14. 根据权利要求13所述的方法，其特征在于，所述第一MBS会话的参考信息包括以下一种或多种：所述第一MBS会话的优先级、所述第一MBS会话的可靠性要求、所述第一MBS会话的时延、所述第一MBS会话的分配保持优先级ARP、用于指示允许处于空闲态或RRC非激活态的接收端接收所述第一MBS会话的业务数据的第一指示信息、用于指示允许不满足所述第一MBS会话的服务质量QoS的第二指示信息；
    其中，所述第一MBS会话的可靠性要求为所述第一MBS会话的QoS流的第5代5G QoS指示符5QI中可靠性要求最高的可靠性要求；所述第一MBS会话的时延为所述第一MBS会话的QoS流的5QI中时延最低的时延；所述第一MBS会话的ARP为所述第一MBS会话的QoS流的ARP中最低的ARP。
  15. 根据权利要求13或14所述的方法，其特征在于，所述多播/广播会话管理网元获取第一MBS会话的参考信息，包括：
    所述多播/广播会话管理网元接收MBS会话建立请求，所述MBS会话建立请求包括所述第一MBS会话的参考信息；或，
    所述多播/广播会话管理网元接收来自策略管理网元的所述第一MBS会话策略信息，所述第一MBS会话策略信息包括所述第一MBS会话的参考信息；或，
    所述多播/广播会话管理网元接收来自应用功能或策略管理网元的所述第一MBS会话的QoS信息，并根据所述第一MBS会话的QoS信息确定所述第一MBS会话的参考信息。
  16. 根据权利要求15所述的方法，其特征在于，所述MBS会话建立请求携带第一接收端的参考信息，或，所述第一MBS会话策略信息包括所述第一接收端的参考信息；
    其中，所述第一接收端为所述第一MBS会话对应的接收端中的一个或多个。
  17. 根据权利要求16所述的方法，其特征在于，所述第一接收端的参考信息包括以下一种或多种：所述第一接收端在所述第一MBS会话中的优先级、用于指示允许所述第一接收端处于空闲态或RRC非激活态接收所述第一MBS会话的业务数据的第三指示信息。
  18. 根据权利要求16或17所述的方法，其特征在于，所述方法还包括：
    所述多播/广播会话管理网元接收来自所述会话管理网元的所述第一接收端的标识信息；
    所述多播/广播会话管理网元向会话管理网元发送所述第一MBS会话的参考信息，包括：
    所述多播/广播会话管理网元根据所述标识信息，向所述会话管理网元发送所述第一接收端的参考信息。
  19. 一种通信方法，其特征在于，包括：
    接入网设备接收来自会话管理网元的第一多播/广播业务MBS会话的第一接收端的参考信息，所述第一接收端的参考信息用于表示所述第一接收端的特征；
    所述接入网设备根据所述第一接收端的参考信息，触发所述第一接收端进入空闲态或无线资源控制RRC非激活态。
  20. 根据权利要求19所述的方法，其特征在于，所述第一接收端的参考信息包括下一 种或多种：所述第一接收端在所述第一MBS会话中的优先级、用于指示允许所述第一接收端处于空闲态或RRC非激活态接收所述第一MBS会话上的业务数据的第三指示信息。
  21. 根据权利要求20所述的方法，其特征在于，当所述第一接收端的参考信息包括所述第一接收端在所述第一MBS会话中的优先级时，所述接入网设备根据所述第一接收端的参考信息，触发所述第一接收端进入空闲态或RRC非激活态，包括：
    若所述第一接收端在所述第一MBS会话中的优先级低于第二预设优先级，则所述接入网设备触发所述第一接收端进入空闲态或RRC非激活态；或，
    若所述第一接收端在所述第一MBS会话中的优先级在所述第一MBS会话对应的所有接收端中优先级最低，则所述接入网设备触发所述第一接收端进入空闲态或RRC非激活态。
  22. 根据权利要求19-21中任一所述的方法，其特征在于，所述触发所述第一接收端进入空闲态或RRC非激活态之前，所述方法还包括：
    所述接入网设备确定所述第一接收端不存在除所述第一MBS会话的业务数据以外的业务数据传输。
  23. 根据权利要求19-22中任一所述的方法，其特征在于，所述接入网设备根据所述第一接收端的参考信息，触发所述第一接收端进入空闲态或无线资源控制RRC非激活态之前，所述方法还包括：
    所述接入网设备确定处于RRC连接态且接收MBS会话的业务数据的终端的数量高于预设值；或者，
    所述接入网设备确定处于RRC连接态的终端的数量高于预设值。
  24. 一种通信方法，其特征在于，包括：
    多播/广播会话管理网元获取第一多播/广播业务MBS会话的第一接收端的参考信息，所述第一接收端的参考信息用于表示第一接收端的特征；
    所述多播/广播会话管理网元向会话管理网元发送所述第一多播/广播业务MBS会话的第一接收端的参考信息。
  25. 根据权利要求24所述的方法，其特征在于，所述第一接收端的参考信息包括下一种或多种：所述第一接收端在所述第一MBS会话中的优先级、用于指示允许所述第一接收端处于空闲态或无线资源控制RRC非激活态接收所述第一MBS会话上的业务数据的第三指示信息。
  26. 根据权利要求24或25所述的方法，其特征在于，所述多播/广播会话管理网元获取第一MBS会话的第一接收端的参考信息，包括：
    所述多播/广播会话管理网元接收MBS会话建立请求，所述MBS会话建立请求包括所述第一MBS会话的第一接收端的参考信息；或，
    所述多播/广播会话管理网元接收来自策略管理网元的所述第一MBS会话策略信息，所述第一MBS会话策略信息包括所述第一MBS会话的第一接收端的参考信息。
  27. 根据权利要求24-26中任一所述的方法，其特征在于，所述方法还包括：
    所述多播/广播会话管理网元接收来自所述会话管理网元的所述第一接收端的标识信息；
    所述多播/广播会话管理网元向会话管理网元发送所述第一MBS会话的第一接收端的参考信息，包括：
    所述多播/广播会话管理网元根据所述标识信息，向所述会话管理网元发送所述第一接收端的参考信息。
  28. 一种通信方法，其特征在于，包括：
    会话管理网元接收来自多播/广播会话管理网元或统一数据管理网元的第一多播/广播业务MBS会话的第一接收端的参考信息，所述第一接收端的参考信息用于表示所述第一接收端的特征；
    所述会话管理网元向接入网设备发送所述第一接收端的参考信息。
  29. 根据权利要求28所述的方法，其特征在于，所述第一接收端的参考信息包括下一种或多种：所述第一接收端在所述第一MBS会话中的优先级、用于指示允许所述第一接收端处于空闲态或无线资源控制RRC非激活态接收所述第一MBS会话上的业务数据的第三指示信息。
  30. 一种通信装置，其特征在于，包括：
    收发单元，用于接收来自会话管理网元或接入与移动管理网元的第一多播/广播业务MBS会话的参考信息，所述第一MBS会话的参考信息用于表示所述第一MBS会话的特征；
    处理单元，用于根据所述第一MBS会话的参考信息，触发所述第一MBS会话对应的第一接收端进入空闲态或无线资源控制RRC非激活态。
  31. 根据权利要求30所述的装置，其特征在于，所述第一MBS会话的参考信息包括以下一种或多种：所述第一MBS会话的优先级、所述第一MBS会话的可靠性要求、所述第一MBS会话的时延、所述第一MBS会话的分配保持优先级ARP、用于指示允许处于空闲态或RRC非激活态的接收端接收所述第一MBS会话的业务数据的第一指示信息、用于指示允许不满足所述第一MBS会话的服务质量QoS需求的第二指示信息；
    其中，所述第一MBS会话的可靠性要求为所述第一MBS会话的QoS流的第5代5G QoS指示符5QI中可靠性要求最高的可靠性要求；所述第一MBS会话的时延为所述第一MBS会话的QoS流的5QI中时延最低的时延；所述第一MBS会话的ARP为所述第一MBS会话的QoS流的ARP中最低的ARP。
  32. 根据权利要求31所述的装置，其特征在于，当所述第一MBS会话的参考信息包括所述第一MBS的优先级时，所述处理单元具体用于：
    若所述第一MBS会话的优先级低于第一预设优先级，则触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，
    若所述第一MBS会话的优先级在所述接入网设备的所有MBS会话中优先级最低，则触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
  33. 根据权利要求31或32所述的装置，其特征在于，当所述第一MBS会话的参考信息包括所述第一MBS会话的可靠性要求时，所述处理单元具体用于：
    若所述第一MBS会话的可靠性要求低于第一阈值，则触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，
    若所述第一MBS会话的可靠性要求在所述接入网设备的所有MBS会话中可靠性要求最低，则触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
  34. 根据权利要求31-33中任一所述的装置，其特征在于，当所述第一MBS会话的参考信息包括所述第一MBS会话的时延时，所述处理单元具体用于：
    若所述第一MBS会话的时延高于第二阈值，则触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，
    若所述第一MBS会话的时延在接入网设备的所有MBS会话中时延最高，则触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
  35. 根据权利要求31-34中任一所述的装置，其特征在于，当所述第一MBS会话的参考信息包括所述第一MBS会话的ARP时，所述处理单元具体用于：
    若所述第一MBS会话的ARP高于第三阈值，则触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态；或，
    若所述第一MBS会话的ARP在所述接入网设备的所有MBS中ARP最高，则触发所述第一MBS会话对应的第一接收端进入空闲态或RRC非激活态。
  36. 根据权利要求30-35中任一所述的装置，其特征在于，所述第一接收端为所述第一MBS会话对应的接收端中的一个或多个。
  37. 根据权利要求30-36中任一所述的装置，其特征在于，所述处理单元还用于：
    确定所述第一接收端不存在除所述第一MBS会话的业务数据以外的业务数据传输。
  38. 根据权利要求36或37所述的装置，其特征在于，所述收发单元还用于：
    接收来自所述会话管理网元的所述第一接收端的参考信息，所述第一接收端的参考信息包括以下一种或多种：所述第一接收端在所述第一MBS会话中的优先级、用于指示允许所述第一接收端处于空闲态或RRC非激活态接收所述第一MBS会话的业务数据的第三指示信息；
    所述处理单元，具体用于：
    根据所述第一接收端的参考信息触发所述第一接收端进入空闲态或RRC非激活态。
  39. 根据权利要求38所述的装置，其特征在于，当所述第一接收端的参考信息包括所述第一接收端在所述第一MBS会话中的优先级时，所述处理单元用于：
    若所述第一接收端在所述第一MBS会话中的优先级低于第二预设优先级，则触发所述第一接收端进入空闲态或RRC非激活态；或，
    若所述第一接收端在所述第一MBS会话中的优先级在所述第一MBS会话对应的所有接收端中最低，则触发所述第一接收端进入空闲态或RRC非激活态。
  40. 根据权利要求30-39中任一所述的装置，其特征在于，所述处理单元还用于：
    确定处于RRC连接态且接收MBS会话的业务数据的终端的数量高于预设值；或者，
    确定处于RRC连接态的终端的数量高于预设值。
  41. 根据权利要求30-40中任一所述的装置，其特征在于，所述处理单元还用于：
    未接收到第四指示信息，所述第四指示信息用于表示所述第一接收端不允许在空闲态或RRC非激活态接收所述第一MBS会话的业务数据，或表示所述第一接收端为所述第一MBS会话提供中继服务。
  42. 一种通信装置，其特征在于，包括：
    处理单元，用于获取第一多播/广播业务MBS会话的参考信息，所述第一MBS会话的参考信息用于表示所述第一MBS会话的特征；
    收发单元，用于向会话管理网元或接入与移动管理网元发送所述第一MBS会话的参考信息。
  43. 根据权利要求42所述的装置，其特征在于，所述第一MBS会话的参考信息包括以 下一种或多种：所述第一MBS会话的优先级、所述第一MBS会话的可靠性要求、所述第一MBS会话的时延、所述第一MBS会话的分配保持优先级ARP、用于指示允许处于空闲态或RRC非激活态的接收端接收所述第一MBS会话的业务数据的第一指示信息、用于指示允许不满足所述第一MBS会话的服务质量QoS的第二指示信息；
    其中，所述第一MBS会话的可靠性要求为所述第一MBS会话的QoS流的第5代5G QoS指示符5QI中可靠性要求最高的可靠性要求；所述第一MBS会话的时延为所述第一MBS会话的QoS流的5QI中时延最低的时延；所述第一MBS会话的ARP为所述第一MBS会话的QoS流的ARP中最低的ARP。
  44. 根据权利要求42或43所述的装置，其特征在于，所述收发单元，具体用于：
    接收MBS会话建立请求，所述MBS会话建立请求包括所述第一MBS会话的参考信息；或，
    接收来自策略管理网元的所述第一MBS会话策略信息，所述第一MBS会话策略信息包括所述第一MBS会话的参考信息；或，
    接收来自应用功能或策略管理网元的所述第一MBS会话的QoS信息，并根据所述第一MBS会话的QoS信息确定所述第一MBS会话的参考信息。
  45. 根据权利要求44所述的装置，其特征在于，所述MBS会话建立请求携带第一接收端的参考信息，或，所述第一MBS会话策略信息包括所述第一接收端的参考信息；
    其中，所述第一接收端为所述第一MBS会话对应的接收端中的一个或多个。
  46. 根据权利要求45所述的装置，其特征在于，所述第一接收端的参考信息包括以下一种或多种：所述第一接收端在所述第一MBS会话中的优先级、用于指示允许所述第一接收端处于空闲态或RRC非激活态接收所述第一MBS会话的业务数据的第三指示信息。
  47. 根据权利要求45或46所述的装置，其特征在于，所述收发单元，还用于：
    接收来自所述会话管理网元的所述第一接收端的标识信息；
    根据所述标识信息，向所述会话管理网元发送所述第一接收端的参考信息。
  48. 一种通信装置，其特征在于，包括：
    收发单元，用于接收来自会话管理网元的第一多播/广播业务MBS会话的第一接收端的参考信息，所述第一接收端的参考信息用于表示所述第一接收端的特征；
    处理单元，用于把根据所述第一接收端的参考信息，触发所述第一接收端进入空闲态或无线资源控制RRC非激活态。
  49. 根据权利要求48所述的装置，其特征在于，所述第一接收端的参考信息包括下一种或多种：所述第一接收端在所述第一MBS会话中的优先级、用于指示允许所述第一接收端处于空闲态或RRC非激活态接收所述第一MBS会话上的业务数据的第三指示信息。
  50. 根据权利要求49所述的装置，其特征在于，当所述第一接收端的参考信息包括所述第一接收端在所述第一MBS会话中的优先级时，所述处理单元，具体用于：
    若所述第一接收端在所述第一MBS会话中的优先级低于第二预设优先级，则触发所述第一接收端进入空闲态或RRC非激活态；或，
    若所述第一接收端在所述第一MBS会话中的优先级在所述第一MBS会话对应的所有接收端中优先级最低，则触发所述第一接收端进入空闲态或RRC非激活态。
  51. 根据权利要求48-50中任一所述的装置，其特征在于，所述处理单元，还用于：
    确定所述第一接收端不存在除所述第一MBS会话的业务数据以外的业务数据传输。
  52. 根据权利要求48-51中任一所述的装置，其特征在于，所述处理单元，还用于：
    确定处于RRC连接态且接收MBS会话的业务数据的终端的数量高于预设值；或者，
    确定处于RRC连接态的终端的数量高于预设值。
  53. 一种通信装置，其特征在于，包括：
    处理单元，用于获取第一多播/广播业务MBS会话的第一接收端的参考信息，所述第一接收端的参考信息用于表示第一接收端的特征；
    收发单元，用于向会话管理网元发送所述第一多播/广播业务MBS会话的第一接收端的参考信息。
  54. 根据权利要求53所述的装置，其特征在于，所述第一接收端的参考信息包括下一种或多种：所述第一接收端在所述第一MBS会话中的优先级、用于指示允许所述第一接收端处于空闲态或无线资源控制RRC非激活态接收所述第一MBS会话上的业务数据的第三指示信息。
  55. 根据权利要求53或54所述的装置，其特征在于，所述收发单元，具体用于：
    接收MBS会话建立请求，所述MBS会话建立请求包括所述第一MBS会话的第一接收端的参考信息；或，
    接收来自策略管理网元的所述第一MBS会话策略信息，所述第一MBS会话策略信息包括所述第一MBS会话的第一接收端的参考信息。
  56. 根据权利要求53-55中任一所述的装置，其特征在于，所述收发单元，还用于：
    接收来自所述会话管理网元的所述第一接收端的标识信息；
    根据所述标识信息，向所述会话管理网元发送所述第一接收端的参考信息。
  57. 一种通信装置，其特征在于，包括：
    收发单元，用于接收来自多播/广播会话管理网元或统一数据管理网元的第一多播/广播业务MBS会话的第一接收端的参考信息，所述第一接收端的参考信息用于表示所述第一接收端的特征；
    向接入网设备发送所述第一接收端的参考信息。
  58. 根据权利要求57所述的装置，其特征在于，所述第一接收端的参考信息包括下一种或多种：所述第一接收端在所述第一MBS会话中的优先级、用于指示允许所述第一接收端处于空闲态或无线资源控制RRC非激活态接收所述第一MBS会话上的业务数据的第三指示信息。
  59. 一种通信装置，其特征在于，包括：至少一个处理器和存储器；
    所述存储器，用于存储计算机程序或指令；
    所述至少一个处理器，用于执行所述计算机程序或指令，以使得如权利要求1-12中任一项或权利要求13-18中任一项或权利要求19-23中任一项或权利要求24-27中任一项或28-29中任一项所述的方法被执行。
  60. 一种芯片系统，其特征在于，所述芯片系统包括：处理电路；所述处理电路与存储介质耦合；
    所述处理电路，用于执行所述存储介质中的部分或者全部计算机程序或指令，当所述部分或者全部计算机程序或指令被执行时，用于实现如权利要求1-12任一项或13-18任一项或19-23任一项或24-27任一项或28-29任一项所述的方法。
  61. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有指令，当 所述指令被计算机执行时，使得如权利要求1-12任一项或13-18任一项或19-23任一项或24-27任一项或28-29任一项所述的方法被执行。
  62. 一种包含计算机程序或指令的计算机程序产品，其特征在于，当其在计算机上运行时，使得上述权利要求1-12任一项或13-18任一项或19-23任一项或24-27任一项或28-29任一项所述的方法被执行。
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