WO2021136465A1 - Appareil et procédé de notification d'opération d'utilisateur de multidiffusion, et dispositif de communication - Google Patents

Appareil et procédé de notification d'opération d'utilisateur de multidiffusion, et dispositif de communication Download PDF

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Publication number
WO2021136465A1
WO2021136465A1 PCT/CN2020/141887 CN2020141887W WO2021136465A1 WO 2021136465 A1 WO2021136465 A1 WO 2021136465A1 CN 2020141887 W CN2020141887 W CN 2020141887W WO 2021136465 A1 WO2021136465 A1 WO 2021136465A1
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Prior art keywords
multicast
user
multicast service
deactivating
information
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PCT/CN2020/141887
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English (en)
Chinese (zh)
Inventor
谢振华
王文
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks

Definitions

  • the present invention relates to the field of communication technology, and in particular to a method, device and communication equipment for notifying a multicast user operation.
  • multicast services are provided in the form of network elements.
  • the core network of the fifth-generation mobile communication technology (5th-Generation, 5G) network adopts a service-based architecture based on network functions, and the core network will no longer be provided based on network elements with complete software and hardware. Services, but provide services based on network functions in the form of software. Therefore, under the service-oriented architecture based on network functions, it has not yet been determined how to notify multicast users of operations.
  • the embodiments of the present invention provide a method, a device, and a communication device for notifying a multicast user operation, so as to solve the problem of how to notify the multicast user of the operation under a service-oriented architecture based on network functions.
  • an embodiment of the present invention provides a method for notifying a multicast user operation, which is applied to the first network function of a communication device, including:
  • the call parameter is used to call the multicast context user delete service operation of the second network function.
  • an embodiment of the present invention provides a method for notifying a multicast user operation, which is applied to the second network function of a communication device, including:
  • the notification information of deactivating the multicast service is sent to the terminal through the broadcast-multicast user plane function.
  • an embodiment of the present invention provides a method for notifying a multicast user operation, which is applied to a terminal, and includes:
  • the first operation includes at least one of the following:
  • an embodiment of the present invention provides a notification device for multicast user operations, which is applied to the first network function of a communication device, and includes:
  • the first sending module is configured to send call parameters to the second network function; the call parameters are used to call the multicast context user delete service operation of the second network function.
  • an embodiment of the present invention provides a notification device for multicast user operations, which is applied to the second network function of a communication device, including:
  • the second sending module is used to send notification information of deactivating the multicast service to the terminal through the broadcast-multicast user plane function
  • an embodiment of the present invention provides a notification device for multicast user operations, which is applied to a terminal, and includes:
  • the second receiving module is used to receive broadcast notification information of deactivating the multicast service
  • the execution module is configured to execute the first operation according to the notification information of deactivating the multicast service
  • the first operation includes at least one of the following:
  • an embodiment of the present invention provides a communication device, including a memory, a processor, and a computer program stored on the memory and running on the processor, wherein the computer program is processed by the processor.
  • the device When the device is executed, the steps of the notification method for the above-mentioned multicast user operation are realized.
  • an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the steps of the method for notifying a multicast user operation described above.
  • the first network function can call the user delete service operation of the multicast context of the second network function, thereby sending notification information for deactivating the multicast service to the terminal, so that the terminal stops receiving the multicast service data And/or initiate a unicast session establishment process to realize notification of multicast user operations.
  • FIG. 1 is a schematic diagram of the functional architecture of a multicast service according to an embodiment of the present invention
  • FIG. 2 is one of the flowcharts of the method for notifying a multicast user operation according to an embodiment of the present invention
  • FIG. 3 is the second flowchart of the method for notifying a multicast user operation according to an embodiment of the present invention
  • FIG. 4 is the third flowchart of the method for notifying a multicast user operation according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a notification process of a multicast user operation in application scenario 1 of an embodiment of the present invention
  • FIG. 6 is a flowchart of a notification process of a multicast user operation in application scenario 2 of an embodiment of the present invention
  • FIG. 7 is one of the schematic structural diagrams of a notification device operated by a multicast user according to an embodiment of the present invention.
  • FIG. 8 is the second structural diagram of a notification device operated by a multicast user according to an embodiment of the present invention.
  • FIG. 9 is the third structural diagram of a notification device operated by a multicast user according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
  • the communication device may be a terminal or a core network device.
  • the terminal can also be called a terminal device or a user terminal (User Equipment, UE), and the terminal can be a mobile phone, a tablet (Personal Computer), a laptop (Laptop Computer), a personal digital assistant (Personal Digital Assistant, PDA). ), Mobile Internet Device (MID), Wearable Device (Wearable Device), or in-vehicle device and other terminal-side devices.
  • UE User Equipment
  • PDA Personal Digital Assistant
  • MID Mobile Internet Device
  • Wearable Device Wearable Device
  • in-vehicle device and other terminal-side devices.
  • the specific types of terminals are not limited in the embodiments of the present invention.
  • the aforementioned core network equipment includes network functions (Network Function, NF), which include but are not limited to: Access Management Function (AMF), Session Management Function (SMF), User Plane Function (User Plan Function (UPF), Broadcast Multicast Policy Control Function (MBPCF), Broadcast Multicast Session Management (MBSF), Multicast Broadcast User Plan Function (MBUF) )Wait.
  • AMF Access Management Function
  • SMF Session Management Function
  • UPF User Plane Function
  • MPCF Broadcast Multicast Policy Control Function
  • MBSF Broadcast Multicast Session Management
  • MBUF Multicast Broadcast User Plan Function
  • the terminal and the user are different concepts.
  • the user can be understood as the owner of the terminal and the user of the terminal.
  • the multicast function can be decomposed into 3 NFs: 1) MBSF, responsible for multicast session user context management; 2) MBUF, responsible for multi-copy forwarding of multicast data; 3) MBPCF, responsible for multicast Authorized users and service quality.
  • the network functions involved in the multicast service are described as follows with reference to FIG. 1.
  • the interfaces and service calls corresponding to the network functions can include:
  • Interface R101 signaling interaction between UE and AMF.
  • Interface R102 UE and radio access system (Radio Access Network, RAN), that is, signaling and data exchange between base station systems.
  • Radio Access Network RAN
  • Interface R103 signaling interaction between RAN and AMF.
  • Interface R104 Control signaling interaction between UPF and SMF.
  • Interface R105 Control signaling interaction between MBUF and MBSF.
  • AMF opens various access management-related services for other NFs to invoke.
  • Service-based invocation S107 SMF opens up various session management-related services for other NFs to invoke.
  • MBPCF opens up various broadcast and multicast policy control related services for other NFs to invoke.
  • Service-based invocation S109 MBSF opens up various broadcast-multicast session management-related services for other NFs to invoke.
  • FIG. 2 is a flowchart of a method for notifying a multicast user operation according to an embodiment of the present invention.
  • the method is applied to a first network function of a communication device, and the first network function may optionally be MBPCF.
  • the method includes the following steps:
  • Step 201 Send the calling parameter to the second network function.
  • the second network function may be MBSF.
  • the call parameter is, for example, Nmbsf_MBContext_UserDelete, which can be used to call the multicast context user delete service operation of the second network function.
  • MBPCF can determine whether to delete a user from the multicast group (for example, due to arrears, or because the number of users needs to change the data transmission method), or receive other network functions (such as unified data management) After (unified data manager, UDM), or Network Exposure Function (NEF)) or network element (such as Content Provider) notifies the user to delete the message, the MBSF multicast context user delete service operation is invoked.
  • unified data management unified data management
  • NEF Network Exposure Function
  • the aforementioned call parameters may include but are not limited to at least one of the following:
  • Reason information where the reason information is used to indicate to stop the multicast service or change the service mode
  • the foregoing multicast service information may include but is not limited to at least one of the following:
  • Multicast IP Multicast service address
  • TMGI Temporal Mobile Group Identifier
  • the foregoing notification information for deactivating the multicast service may include but not limited to at least one of the following:
  • the first network function can call the multicast context user delete service operation of the second network function, thereby sending notification information to deactivate the multicast service to the terminal, so that the terminal stops receiving the multicast service data and / Or initiate a unicast session establishment process to realize notification of multicast user operations.
  • FIG. 3 is a flowchart of another method for notifying a multicast user operation according to an embodiment of the present invention.
  • the method is applied to the second network function of the communication device, and the second network function may be selected as: MBSF , Or NF jointly established by MBPCF and MBSF.
  • the method includes the following steps:
  • Step 301 Send notification information of deactivating the multicast service to the terminal through MBUF.
  • the notification information for deactivating the multicast service may include but is not limited to at least one of the following: multicast service information; user ID or user group ID; reason information, the reason information is used to indicate the stop of the multicast service Or change the service mode.
  • the method may further include: receiving the call parameter sent by the first network function.
  • the call parameter is used to call the MBSF multicast context user delete service operation, and the first network function is MBPCF.
  • the invocation parameter may include, but is not limited to, at least one of the following: multicast service information; user ID or user group ID; reason information, where the reason information is used to instruct to stop the multicast service or change the service mode; The received notification information of deactivating the multicast service.
  • the above step 301 may include: sending a signaling forwarding message to MBUF; wherein the signaling forwarding message includes notification information of deactivating the multicast service received by the terminal, so that the MBUF can deactivate the multicast service.
  • the notification information of the service is sent to the terminal.
  • the MBUF used to forward the notification information of deactivating the multicast service may be selected according to the multicast service information.
  • the notification information for deactivating the multicast service received by the terminal may be generated by MBSF in addition to being sent by MBPCF to MBSF by calling parameters.
  • the method may further include: generating notification information for deactivating the multicast service.
  • the second network function is formed by the combination of MBPCF and MBSF, the second network function can realize both the function of MBPCF and the function of MBSF.
  • the second network function can send the notification information of deactivating the multicast service to the terminal through MBUF, so that the terminal stops receiving the multicast service data and/or initiates the unicast session establishment process, and realizes the operation of the multicast user. Notice.
  • FIG. 4 is a flowchart of another method for notifying a multicast user operation according to an embodiment of the present invention, and the method is applied to a terminal. As shown in Figure 4, the method includes the following steps:
  • Step 401 Receive broadcast notification information of deactivating the multicast service.
  • the notification information for deactivating the multicast service may be sent by the RAN in the form of broadcast data, and may include, but is not limited to, at least one of the following: multicast service information; user ID or user group ID; reason information, said The reason information is used to indicate to stop the multicast service or change the service mode.
  • Step 402 Perform a first operation according to the notification information of deactivating the multicast service.
  • the first operation includes at least one of the following:
  • the terminal may determine whether the notification information for deactivating the multicast service is sent to itself according to the user ID, or according to the user ID.
  • the user group identifier determines that the notification information for deactivating the multicast service is sent to the group where the user belongs, the first operation is performed.
  • the terminal may perform the first operation according to the content indicated by the cause information.
  • the terminal can receive broadcast notification information of deactivating the multicast service, and based on the notification information of deactivating the multicast service, can stop receiving multicast service data and/or initiate a unicast session establishment process, thereby Achieve notification of multicast user operations.
  • the multicast user operation notification process in Application Scenario 1 of the embodiment of the present invention may include the following steps:
  • Step 501 MBPCF determines that the user is to be deleted from the multicast group (for example, due to arrears, or the data transmission method needs to be changed due to too few users), or other network functions (such as UDM, or NEF) or network elements are received (For example, the content provider) informs the user to delete the message.
  • the MBPCF may search for all MBSFs participating in the multicast service according to the multicast service information, and perform step 502 one by one; or, perform step 502 one by one for all MBSFs participating in the multicast service.
  • Step 502 MBPCF sends call parameters to MBSF, and calls MBSF's multicast context user to delete the service operation.
  • the call parameter is, for example, Nmbsf_MBContext_UserDelete.
  • the invocation parameter may include multicast service information (such as multicast address Multicast IP, or multicast group identifier TMGI); if it does not include multicast service information, all users participating in the multicast service are notified.
  • the call parameter may also contain reason information, which is used to indicate to stop the multicast service or change the service mode.
  • the call parameter may also include a user ID or a user group ID; if the user ID or user group ID is not included, all users participating in the multicast service are notified.
  • the MBSF may search for all MBUFs participating in the multicast service according to the multicast service information, and perform step 503 one by one; or, perform step 503 one by one for all MBUFs participating in the multicast service.
  • Step 503 MBSF sends a signaling forwarding message to MBUF.
  • the signaling forwarding message is, for example, an MB Session Message Transfer message.
  • the signaling forwarding message includes notification information for deactivating the multicast service sent to the UE.
  • the signaling forwarding message can include reason information (received from MBPCF, used to instruct to stop the multicast service or change the service mode), it can also include user identification or user group identification (received from MBPCF), and it can also include multicast service. Information (received from MBPCF).
  • Step 504 MBUF returns a response message to MBSF.
  • Step 505 MBUF sends notification information for deactivating the multicast service to all RANs participating in the multicast service; or, according to the multicast service information, sends notification information for deactivating the multicast service to the RAN participating in the designated multicast service.
  • the notification information for deactivating the multicast service may include multicast service information, user identification or user group identification, and reason information for instructing to stop the multicast service or change the service mode.
  • Step 506 The RAN sends the notification information of deactivating the multicast service through broadcast data.
  • Step 507 After receiving the broadcast notification information of deactivating the multicast service, the UE stops receiving the multicast service data, and/or initiates a unicast session establishment process.
  • the notification information received by the UE can first determine whether the notification information is sent to itself or its own group, and perform corresponding operations according to the determination result. Or, if the notification information received by the UE includes cause information, corresponding operations can be performed according to the cause information.
  • the multicast user operation notification process in application scenario 2 of the embodiment of the present invention may include the following steps:
  • Step 601 MBPCF determines that the user is to be deleted from the multicast group (for example, due to arrears, or the data transmission method needs to be changed due to too few users), or other network functions (such as UDM, or NEF) or network elements are received (For example, the content provider) informs the user to delete the message.
  • network functions such as UDM, or NEF
  • network elements are received (For example, the content provider) informs the user to delete the message.
  • the message notified by the content provider includes multicast service information, may also include notification information for deactivating the multicast service to be sent to the UE, may also include user identification or user group identification, and may also include reason information. Used to instruct to stop the multicast service or change the service mode.
  • the notification information for deactivating the multicast service to be sent to the UE may include a user identifier or a user group identifier, and may also include reason information, which is used to instruct to stop the multicast service or change the service mode.
  • the MBPCF may search for all MBSFs participating in the multicast service according to the multicast service information, and perform step 602 one by one; or, perform step 602 one by one for all MBSFs participating in the multicast service.
  • Step 602 MBPCF sends call parameters to MBSF, and calls MBSF's multicast context user delete service operation.
  • the call parameter is, for example, Nmbsf_MBContext_UserDelete.
  • the invocation parameter may include multicast service information (such as multicast address Multicast IP, or multicast group identifier TMGI); if it does not include multicast service information, all users participating in the multicast service are notified.
  • the call parameter may also contain reason information, which is used to indicate to stop the multicast service or change the service mode.
  • the call parameter may also include a user ID or a user group ID; if the user ID or user group ID is not included, all users participating in the multicast service are notified.
  • the invocation parameter may also include the notification information to be sent to the UE to deactivate the multicast service.
  • the MBSF may search for all MBUFs participating in the multicast service according to the multicast service information, and perform step 603 one by one; or, perform step 603 one by one for all MBUFs participating in the multicast service.
  • Step 603 MBSF sends a signaling forwarding message to MBUF.
  • the signaling forwarding message is, for example, an MB Session Message Transfer message.
  • the signaling forwarding message includes notification information for deactivating the multicast service sent to the UE.
  • the signaling forwarding message can include reason information (received from MBPCF, used to instruct to stop the multicast service or change the service mode), it can also include user identification or user group identification (received from MBPCF), and it can also include multicast service.
  • Information (received from MBPCF), or notification information received from MBPCF to deactivate the multicast service.
  • Step 604 MBUF returns a response message to MBSF.
  • Step 605 MBUF sends notification information of deactivating the multicast service to all RANs participating in the multicast service; or, according to the multicast service information, sending notification information of deactivating the multicast service to the RAN participating in the designated multicast service.
  • the notification information for deactivating the multicast service may include a user identifier or a user group identifier, and may also include reason information, which is used to instruct to stop the multicast service or change the service mode.
  • Step 606 The RAN sends the notification information of deactivating the multicast service through broadcast data.
  • Step 607 After receiving the broadcast notification information of deactivating the multicast service, the UE stops receiving the multicast service data, and/or initiates a unicast session establishment process.
  • the notification information received by the UE can first determine whether the notification information is sent to itself or its own group, and perform corresponding operations according to the determination result. Or, if the notification information received by the UE includes cause information, corresponding operations can be performed according to the cause information.
  • MBPCF and MBSF can also be co-located, and the network function of the co-located network can realize MBPCF.
  • the function can also realize the function of MBSF, without the interaction process between MBPCF and MBSF, and other processes are similar, so I will not repeat them here.
  • FIG. 7 is a schematic structural diagram of a notification device operated by a multicast user according to an embodiment of the present invention.
  • the notification device is applied to a first network function of a communication device.
  • the first network function may be selected as: MBPCF .
  • the notification device 70 includes:
  • the first sending module 71 is configured to send invocation parameters to the second network function
  • the call parameter is used to call the multicast context user delete service operation of the second network function.
  • the invocation parameter may include at least one of the following:
  • Reason information where the reason information is used to indicate to stop the multicast service or change the service mode
  • the multicast service information may include at least one of the following:
  • the notification information for deactivating the multicast service may include at least one of the following:
  • notification device 70 of this embodiment can implement each process implemented in the method embodiment shown in FIG. 2 and achieve the same beneficial effects. In order to avoid repetition, details are not described herein again.
  • FIG. 8 is a schematic structural diagram of another notification device operated by a multicast user according to an embodiment of the present invention.
  • the notification device is applied to a second network function of a communication device, and the second network function may be selected as: MBSF, or NF jointly established by MBPCF and MBSF, etc.
  • the notification device 80 includes:
  • the second sending module 81 is configured to send notification information for deactivating the multicast service to the terminal through MBUF.
  • the notification device 80 may further include:
  • the first receiving module is configured to receive the calling parameter sent by the first network function; wherein the calling parameter is used to call the multicast context user deletion service operation of the second network function.
  • the invocation parameter may include at least one of the following:
  • Reason information where the reason information is used to indicate to stop the multicast service or change the service mode
  • the second sending module 81 is specifically configured to:
  • the signaling forwarding message includes the notification information of the deactivation of the multicast service, so that the MBUF sends the notification information of the deactivation of the multicast service to the terminal.
  • the invocation parameter includes multicast service information, and the MBUF is selected according to the multicast service information.
  • the notification device 80 may further include:
  • the generating module is used to generate the notification information for deactivating the multicast service.
  • the notification information for deactivating the multicast service may include at least one of the following:
  • notification device 80 of this embodiment can implement each process implemented in the method embodiment shown in FIG. 3 and achieve the same beneficial effects. In order to avoid repetition, details are not described herein again.
  • FIG. 9 is a schematic structural diagram of another notification device operated by a multicast user according to an embodiment of the present invention, and the notification device is applied to a terminal.
  • the notification device 90 includes:
  • the second receiving module 91 is configured to receive broadcast notification information of deactivating the multicast service
  • the execution module 92 is configured to execute the first operation according to the notification information of deactivating the multicast service
  • the first operation includes at least one of the following:
  • the execution module 92 is specifically configured to: determine the notification information for deactivating the multicast service according to the user ID If it is sent to oneself, or when it is determined that the notification information for deactivating the multicast service is sent to one's own group according to the user group identifier, the first operation is performed.
  • the execution module 92 is specifically configured to execute the first operation according to the content indicated by the cause information.
  • notification device 90 of this embodiment can implement the various processes implemented in the method embodiment shown in FIG. 4 and achieve the same beneficial effects. To avoid repetition, details are not described herein again.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the present invention.
  • the communication device 100 includes a processor 1001, a memory 1002, and a processor 1001, a memory 1002, and a processor 1002, which is stored on the memory 1002 and can be stored in all devices.
  • the computer program running on the processor, the various components in the communication device 100 are coupled together through the bus interface 1003, and when the computer program is executed by the processor 1001, each of the implementations in the method embodiment shown in FIG. 2 can be implemented.
  • the embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, each process implemented in the method embodiment shown in FIG. 2 is implemented, Or, implement each process implemented in the method embodiment shown in FIG. 3, or implement each process implemented in the method embodiment shown in FIG. 4, and achieve the same technical effect. To avoid repetition, details are not repeated here.
  • the computer-readable storage medium such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk, or optical disk, etc.
  • the technical solution of the present invention essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, The optical disc) includes several instructions to make a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present invention.
  • a terminal which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.
  • modules, units, sub-modules, sub-units, etc. can be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (Digital Signal Processing, DSP), digital signal processing equipment ( DSP Device, DSPD), Programmable Logic Device (Programmable Logic Device, PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, Other electronic units or combinations thereof that perform the functions described in this application.
  • ASICs application specific integrated circuits
  • DSP Digital Signal Processing
  • DSP Device digital signal processing equipment
  • PLD Programmable Logic Device
  • Field-Programmable Gate Array Field-Programmable Gate Array
  • FPGA Field-Programmable Gate Array
  • the technology described in some embodiments of the present invention can be implemented by modules (for example, procedures, functions, etc.) that execute the functions described in some embodiments of the present invention.
  • the software codes can be stored in the memory and executed by the processor.
  • the memory can be implemented in the processor or external to the processor.
  • the purpose of the present invention can also be achieved by running a program or a group of programs on any computing device.
  • the computing device may be a well-known general-purpose device. Therefore, the purpose of the present invention can also be achieved only by providing a program product containing program code for realizing the method or device.
  • a program product also constitutes the present invention
  • a storage medium storing such a program product also constitutes the present invention.
  • the storage medium may be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that in the device and method of the present disclosure, obviously, each component or each step can be decomposed and/or recombined.

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  • Data Exchanges In Wide-Area Networks (AREA)
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Abstract

Des modes de réalisation de la présente invention concernent un procédé et un appareil de notification d'opération d'utilisateur de multidiffusion, et un dispositif de communication. Le procédé de notification d'opération d'utilisateur de multidiffusion comprend les étapes suivante : une première fonction de réseau envoie un paramètre d'appel à une seconde fonction de réseau, le paramètre d'appel étant utilisé pour appeler une opération de service de suppression d'utilisateur contextuelle de multidiffusion de la seconde fonction de réseau.
PCT/CN2020/141887 2020-01-02 2020-12-31 Appareil et procédé de notification d'opération d'utilisateur de multidiffusion, et dispositif de communication Ceased WO2021136465A1 (fr)

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CN202010001987.4A CN113068132A (zh) 2020-01-02 2020-01-02 多播用户操作的通知方法、装置和通信设备
CN202010001987.4 2020-01-02

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