WO2023083351A1 - 多播广播业务传输方法及装置 - Google Patents

多播广播业务传输方法及装置 Download PDF

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Publication number
WO2023083351A1
WO2023083351A1 PCT/CN2022/131739 CN2022131739W WO2023083351A1 WO 2023083351 A1 WO2023083351 A1 WO 2023083351A1 CN 2022131739 W CN2022131739 W CN 2022131739W WO 2023083351 A1 WO2023083351 A1 WO 2023083351A1
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Prior art keywords
mbs
tmgi
information
network element
access network
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PCT/CN2022/131739
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English (en)
French (fr)
Inventor
刘潇蔓
柴丽
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China Mobile Communications Group Co Ltd
Research Institute of China Mobile Communication Co Ltd
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China Mobile Communications Group Co Ltd
Research Institute of China 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
    • 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
    • H04W4/08—User group management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/20—Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel

Definitions

  • the present disclosure relates to the field of wireless technologies, in particular to a method and device for transmitting multicast broadcast services.
  • Multicast broadcasting is a technology for transmitting data from one data source to multiple target mobile terminals, which realizes the sharing of network (including core network and access network) resources and improves the utilization of network resources, especially air interface resources.
  • the core network will provide the third generation partnership project (Third Generation Partnership Projects, 3GPP) network identifier (temporary mobile group identity (Temporary Mobile Group Identity, TMGI)) in the core for the multicast broadcast service according to the information provided by the application layer.
  • 3GPP Third Generation Partnership Projects
  • TMGI Temporary mobile group identity
  • Relevant communication technologies support network sharing, including wireless side sharing and core network sharing. Through network sharing, redundant construction of network infrastructure can be avoided as much as possible, and overall network investment can be saved.
  • Radio Access Network sharing (RAN sharing) core network Core Network, CN
  • RAN sharing Radio Access Network sharing
  • CN Core Network
  • the technical problem to be solved in the present disclosure is to provide a multicast broadcast service transmission method and device, which can identify the same multicast broadcast service, avoid repeated transmission of the same multicast broadcast service, and reduce waste of resources.
  • a multicast broadcast service transmission method is provided, which is executed by core network elements, including:
  • the TMGI allocation information includes the mapping relationship between the TMGI and the MBS.
  • the method further includes:
  • the method further includes:
  • the network element of the access network After the network element of the access network establishes an MBS session with a core network, save the user plane tunnel information tunnel 1 corresponding to the MBS session, and reconfigure the MBS session established with other core networks after the network element of the access network Use tunnel 1;
  • the method further includes:
  • the MBS session CP information is configured according to the core network corresponding to the terminal, and the user plane of the terminal is configured according to the tunnel first established in the cell where the terminal is located.
  • the method further includes:
  • the MBS session information includes UP tunnel information, and the UP tunnel information includes at least one of the following: TMGI , tunnel identifier, IP multicast address;
  • adopting the same TMGI allocation rule under different core networks for the same multicast broadcast service MBS includes:
  • the second TMGI allocated by one core network for an MBS does not conflict with the third TMGI allocated by itself for the MBS, configure the third TMGI for the MBS;
  • the second TMGI conflicts with the third TMGI allocated by itself for the MBS, and negotiates with other core network elements for TMGI reallocation;
  • the method further includes:
  • the TMGI, IP address and corresponding cell identifier assigned to the MBS are broadcast among corresponding network elements of multiple different core networks.
  • the method further includes:
  • first user plane information is user plane information and associated control plane information of an MBS session established between the access network element and the core network element.
  • the method further includes:
  • first user plane information is user plane information and associated control plane information of an MBS session established between the access network element and another core network element;
  • the network element of the core network is a session management function SMF or a multicast broadcast service function MBSF.
  • the network element of the core network is MBSF, and judging whether there is radio access network sharing includes:
  • the network element of the core network is an SMF, and before judging that there is sharing of network elements of the access network, the method further includes:
  • An embodiment of the present disclosure also provides a method for transmitting a multicast broadcast service, which is executed by a network element of an access network, including:
  • TMGI allocation information sent by a network element of the core network, where the TMGI allocation information includes a mapping relationship between the TMGI and the multicast broadcast service MBS;
  • the method before receiving the TMGI allocation information sent by the core network element, the method further includes:
  • the method also includes:
  • Reserving a plurality of UP channels dynamically selecting one or more of the UP channels as the UP channel for the terminal under the network element of the access network to receive the MBS, and sending the UP information corresponding to the UP channel to the terminal.
  • the information on which the UP channel is selected includes at least one of the following:
  • the priority information of the channel tunnel provided by the core network element
  • the network element of the core network is a session management function SMF or MBSF.
  • An embodiment of the present disclosure also provides a multicast broadcast service transmission device, which is applied to a core network element, including a transceiver and a processor,
  • the processor is used to interact with other network elements of the core network on the distribution of the temporary mobile group identifier TMGI if it is judged that there is sharing of network elements in the access network, and use the same TMGI distribution for the same multicast broadcast service MBS under different core networks. rule;
  • the transceiver is used to send TMGI allocation information to network elements of the access network, and the TMGI allocation information includes the mapping relationship between TMGI and MBS.
  • the processor is further configured to allocate the same multicast IP address to the same MBS under different core networks.
  • the processor is further configured to store user plane tunnel information corresponding to the MBS session after the access network element establishes an MBS session with a core network Tunnel 1, for the MBS sessions established with other core networks after the access network element, reconfigure and use tunnel 1;
  • the transceiver is further configured to send first indication information to the application function entity AF, indicating that the first multicast data packet is generated only based on the IP multicast address corresponding to tunnel 1; or, analyze the data packet of the application function entity, and send Other data packets except the first multicast data packet are discarded.
  • the processor is further configured to configure the MBS session CP information according to the core network corresponding to the terminal when the terminal joins the multicast group, and configure the CP information according to the core network where the terminal is located.
  • the first established tunnel in the cell configures the user plane of the terminal.
  • the processor is further configured to retain the MBS session information associated with the first TMGI established between the access network element and the core network element , the MBS session information includes UP tunnel information, and the UP tunnel information includes at least one of the following: TMGI, tunnel identifier, IP multicast address;
  • the transceiver is also used to send the UP tunnel information to the terminal.
  • the processor is specifically used for
  • the interactive TMGI allocation of other core network elements associated with the access network element if the corresponding network elements of other core networks have already allocated TMGI, the second TMGI allocated by one core network for an MBS is the same as the second TMGI allocated by itself for the MBS There is no conflict with the third TMGI of the MBS, and the third TMGI is configured for the MBS; the second TMGI allocated for the MBS conflicts with the third TMGI allocated by itself for the MBS, and the TMGI redistribution is negotiated with other core network elements; if other core The network element does not perform TMGI allocation, and directly allocates the third TMGI to the MBS.
  • the transceiver is also used to broadcast the TMGI, IP address and corresponding cell identity allocated for the MBS among corresponding network elements of multiple different core networks.
  • the processor is further configured to store and broadcast first user plane information, where the first user plane information is the network element of the access network and the User plane information and associated control plane information of MBS sessions established between core network elements.
  • the transceiver is further configured to receive first user plane information, and the first user plane information is a combination of the access network element and other core network elements.
  • the network element of the core network is a session management function SMF or MBSF.
  • the network element of the core network is an MBSF
  • the processor is specifically configured to determine whether there is radio access network sharing based on whether the MBSF is a shared network element;
  • the core network element is an SMF
  • the transceiver is further configured to receive second indication information sent by the access and mobility function AMF, indicating that the access network element is a shared access network Yuan and supports MBS;
  • the processor is specifically configured to select, based on the second indication information, an MBSF that has established interfaces with other core network elements, or an MBSF that supports sharing.
  • An embodiment of the present disclosure also provides a multicast broadcast service transmission device, which is applied to an access network element, including a transceiver and a processor,
  • the transceiver is configured to receive TMGI allocation information sent by a core network element, and the TMGI allocation information includes a mapping relationship between TMGI and a multicast broadcast service MBS;
  • the processor is configured to judge whether the same MBS is transmitted from different core network elements according to the TMGI allocation information, and if so, select the first user plane tunnel of one or more MBS sessions as the basic transmission channel;
  • the transceiver is further configured to send notification information to the application function entity AF, instructing AF to stop sending multicast or broadcast data packets to the core network where the second user plane tunnel except the first user plane tunnel is located, or to discard Multicast or broadcast packets for the second user plane tunnel.
  • the transceiver is further configured to send third indication information to the access and mobility function AMF, indicating that the access network element is a shared access network element and supports MBS.
  • the transceiver is further configured to send a reconfiguration message to the terminal, reconfiguring the user plane UP channel of the terminal to a selected UP channel;
  • Reserving a plurality of UP channels dynamically selecting one or more of the UP channels as the UP channel for the terminal under the network element of the access network to receive the MBS, and sending the UP information corresponding to the UP channel to the terminal.
  • the information on which the UP channel is selected includes at least one of the following:
  • the priority information of the channel tunnel provided by the core network element
  • the network element of the core network is a session management function SMF or MBSF.
  • An embodiment of the present disclosure also provides a multicast broadcast service transmission device, including a memory, a processor, and a computer program stored in the memory and operable on the processor; when the processor executes the program
  • a multicast broadcast service transmission device including a memory, a processor, and a computer program stored in the memory and operable on the processor; when the processor executes the program
  • the multicast broadcast service transmission device is applied to a network element of the core network, and the processor is configured to interact with other network elements of the core network on the distribution of the temporary mobile group identifier TMGI if it is judged that there is sharing of network elements of the access network, Adopting the same TMGI allocation rule under different core networks for the same multicast broadcast service MBS; sending TMGI allocation information to network elements of the access network, the TMGI allocation information including the mapping relationship between TMGI and MBS.
  • the processor is further configured to allocate the same multicast IP address to the same MBS under different core networks.
  • the processor is further configured to store user plane tunnel information corresponding to the MBS session after the access network element establishes an MBS session with a core network Tunnel 1, for the MBS session established with other core networks after the access network element, reconfigure and use tunnel 1; send the first indication information to the application function entity AF, indicating that it is only generated based on the IP multicast address corresponding to tunnel 1 The first multicast data packet; or, analyze the data packet of the application function entity, and discard other data packets except the first multicast data packet.
  • the processor is further configured to configure the MBS session CP information according to the core network corresponding to the terminal when the terminal joins the multicast group, and configure the CP information according to the core network where the terminal is located.
  • the first established tunnel in the cell configures the user plane of the terminal.
  • the processor is further configured to retain the MBS session information associated with the first TMGI established between the access network element and the core network element , the MBS session information includes UP tunnel information, and the UP tunnel information includes at least one of the following: TMGI, tunnel identifier, and IP multicast address; sending the UP tunnel information to the terminal.
  • the processor is specifically used to interact with the corresponding network elements of other core networks associated with the network elements of the access network for TMGI allocation; if the corresponding network elements of other core networks have performed TMGI allocation, one of the core networks is The second TMGI allocated by an MBS does not conflict with the third TMGI allocated by itself for the MBS, and the third TMGI is configured for the MBS; the allocated second TMGI conflicts with the third TMGI allocated by itself for the MBS, The core network elements negotiate to perform TMGI reallocation; if other core network elements do not perform TMGI allocation, directly allocate a third TMGI to the MBS.
  • the processor is further configured to broadcast the TMGI, IP address and corresponding cell identifier assigned to the MBS among corresponding network elements of multiple different core networks.
  • the processor is further configured to store and broadcast first user plane information, where the first user plane information is the network element of the access network and the User plane information and associated control plane information of MBS sessions established between core network elements.
  • the processor is further configured to receive first user plane information, where the first user plane information is the network element of the access network and other core network The user plane information and associated control plane information of the MBS session established between the elements; notify the AF to stop sending multicast or broadcast data packets to the MBS, or discard the data packets of the MBS by itself.
  • the network element of the core network is a session management function SMF or MBSF.
  • the network element of the core network is an MBSF
  • the processor is specifically configured to determine whether there is radio access network sharing based on whether the MBSF is a shared network element;
  • the core network element is an SMF
  • the processor is further configured to receive second indication information sent by an access and mobility function AMF, indicating that the access network element is a shared access network and support MBS; select an MBSF that has established interfaces with other core network elements based on the second indication information, or support a shared MBSF.
  • the device for transmitting a multicast broadcast service is applied to a network element of an access network
  • the processor is configured to receive TMGI allocation information sent by a core network element, and the TMGI allocation information includes a relationship between TMGI and a multicast broadcast service MBS According to the TMGI allocation information, it is judged whether the same MBS is transmitted from different core network elements, and if so, select the first user plane tunnel of one or more MBS sessions as the basic transmission channel;
  • the functional entity AF sends notification information, notifying the AF to stop sending multicast or broadcast data packets to the core network where the second user plane tunnel other than the first user plane tunnel is located, or discard the multicast or broadcast data packets of the second user plane tunnel Broadcast packets.
  • the processor is further configured to send third indication information to the access and mobility function AMF, indicating that the access network element is a shared access network element and supports MBS.
  • the processor is further configured to send a reconfiguration message to the terminal, reconfiguring the UP channel of the terminal to the selected UP channel;
  • Reserving a plurality of UP channels dynamically selecting one or more of the UP channels as the UP channel for the terminal under the network element of the access network to receive the MBS, and sending the UP information corresponding to the UP channel to the terminal.
  • the information on which the UP channel is selected includes at least one of the following:
  • the priority information of the channel tunnel provided by the core network element
  • the network element of the core network is a session management function SMF or MBSF.
  • An embodiment of the present disclosure also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps in the above-mentioned method for transmitting a multicast broadcast service are implemented.
  • the core network element judges that there is RAN sharing between the access network elements, it will interact with other core network elements for TMGI allocation, and use the same TMGI allocation rule for the same MBS under different core networks, which can avoid Under RAN sharing deployment, from the core network to the access network, the repeated transmission of multicast broadcast services.
  • FIG. 1 is a schematic diagram of the architecture of a multicast broadcast network
  • Figure 2 is a schematic diagram of RAN sharing
  • FIG. 3 and FIG. 4 are schematic flowcharts of a method for transmitting a multicast broadcast service according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of a multicast broadcast service transmission device according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic diagram of the composition of a multicast broadcast service transmission device according to an embodiment of the present disclosure.
  • FIG. 1 is a schematic diagram of a multicast broadcast network architecture, wherein MBSF is responsible for temporary mobile group identity (TMGI) allocation and service management (service management), and multicast broadcast (Multicast Broadcast, MB) session management function (Session Management Function, SMF) interacts with Application Function (AF).
  • TMGI temporary mobile group identity
  • MB multicast broadcast
  • Session Management Function, SMF Session Management Function
  • AF Application Function
  • N2 is the N2 interface, which is the signaling plane interface between the access network and AMF
  • N3 is the N3 interface, which is the interface between the access network and UPF, and can carry the user plane from the access network to the UPF.
  • the MB-N3 interface can be understood as the interface between the access network and the multicast-user plane function
  • N4 is the N4 interface, which is the interface between the SMF and the UPF
  • N6 is the N6 interface
  • the user plane Functions such as multicast-user plane functions in Figure 1 and users (such as single frequency multicast-users in Figure 1)
  • MB2-U is the MB2-U interface
  • the user plane functions
  • the multicast-user plane function in Figure 1 can communicate with the application function through the N6/MB2-U interface
  • N7 is the N7 interface, which is the interface between the SMF and the policy control function (Policy Control Function, PCF)
  • N9 is the N9
  • the interface is the interface between UPFs.
  • MB-N9 can be understood as the interface between the multicast-user plane function and the user plane function.
  • N11 is the N11 interface, which is the interface between AMF and SMF.
  • N15 is N15 The interface is the interface between AMF and PCF
  • N16a is the N16a interface, which is the interface between SMFs
  • N33 is the N33 interface, which is the interface between the Network Exposure Function (NEF) and AF
  • Npcf is the Npcf interface
  • Nmbsmf is the Nmbsmf interface.
  • the multicast-session management function (MB-SMF) and the network opening function and the single frequency multicast-center can communicate through the Nmbsmf interface.
  • Nmbsu is the Nmbsu interface.
  • Single frequency multicast-center and single frequency multicast-users can communicate through Nmbsu interface
  • xMB-C means xMB-C interface
  • MB2-C means MB2-C interface
  • single frequency multicast-center can communicate through xMB-C /MB2-C
  • xMB-U means xMB-U interface
  • MB2-U means MB2-U interface
  • single frequency multicast - users can communicate with application functions through xMB-U/MB2-U communication.
  • Figure 2 shows a schematic diagram of RAN sharing (radio access network sharing).
  • Network sharing can avoid redundant construction of network infrastructure as much as possible, saving the overall network head investment.
  • CN radio access network sharing, core network not sharing
  • CN radio access network sharing
  • TMGIs different operators
  • Embodiments of the present disclosure provide a multicast broadcast service transmission method and device, which can identify the same multicast broadcast service, avoid repeated transmission of the same multicast broadcast service, and reduce waste of resources.
  • An embodiment of the present disclosure provides a multicast broadcast service transmission method, which is executed by a core network element, as shown in FIG. 3 , including:
  • Step 101 If it is judged that there is access network element sharing, interact with other core network elements on the allocation of temporary mobile group identifier TMGI, and adopt the same TMGI allocation rule for the same multicast broadcast service MBS under different core networks;
  • Step 102 Send TMGI allocation information to an access network element, where the TMGI allocation information includes the mapping relationship between TMGI and MBS.
  • the core network element judges that there is RAN sharing between the access network elements, it will interact with other core network elements for the TMGI allocation, so that the same multicast broadcast service (Multicast Broadcast Service, MBS) in different Using the same TMGI allocation rules under the core network can avoid repeated transmission of multicast broadcast services from the core network to the access network under RAN sharing deployment.
  • MBS Multicast Broadcast Service
  • the method further includes:
  • IP Internet Protocol
  • the method further includes:
  • tunnel 1 After the network element of the access network establishes an MBS session with a core network, save the user plane tunnel information (tunnel 1) corresponding to the MBS session, and for the MBS sessions established with other core networks after the network element of the access network, Reconfiguration uses tunnel 1;
  • the method further includes:
  • a terminal joins a multicast group, configure the MBS session control plane (Control Plane, CP) information according to the core network corresponding to the terminal, and configure the user of the terminal according to the tunnel (tunnel) first established in the cell where the terminal is located noodle.
  • MBS session control plane Control Plane, CP
  • tunnel tunnel
  • the method further includes:
  • the MBS session information includes user plane (User Plane, UP) tunnel information, and the UP tunnel information Including at least one of the following: TMGI, tunnel identifier, IP multicast address;
  • adopting the same TMGI allocation rule under different core networks for the same multicast broadcast service MBS includes:
  • the second TMGI allocated by one core network for an MBS does not conflict with the third TMGI allocated by itself for the MBS, configure the third TMGI for the MBS;
  • the second TMGI conflicts with the third TMGI allocated by itself for the MBS, and negotiates with other core network elements for TMGI reallocation;
  • the method further includes:
  • the TMGI, IP address and corresponding cell identifier assigned to the MBS are broadcast among corresponding network elements of multiple different core networks.
  • the method further includes:
  • first user plane information is user plane information and associated control plane information of an MBS session established between the access network element and the core network element.
  • the method further includes:
  • first user plane information is user plane information and associated control plane information of an MBS session established between the access network element and another core network element;
  • the core network element is a Session Management Function (SMF) or a Multicast Broadcast Service Function (Multicast Broadcast Service Function, MBSF).
  • SMF Session Management Function
  • MBSF Multicast Broadcast Service Function
  • the network element of the core network is MBSF, and judging whether there is radio access network sharing includes:
  • the network element of the core network is an SMF, and before judging that there is sharing of network elements of the access network, the method further includes:
  • AMF Access and Mobility Management Function
  • an access network element such as a base station performs AMF selection
  • it indicates to the core network that it is a shared base station, and indicates that it supports MBS features, and may also indicate other shared operator information.
  • the AMF provides the above information to the (MB)SMF.
  • the network element of the core network is MBSF.
  • (MB)SMF selects MBSF based on the information received by AMF, and (MB)SMF preferentially selects MBSF that has established interfaces with other core network (MB)SMFs, or supports shared MBSF (that is, MBSF shared between multiple core networks) , and then the MBSF sends a successful establishment feedback and carries the allocated TMGI.
  • the MBSF When performing TMGI allocation, if the MBSF finds that there is RAN sharing based on whether the MBSF is a shared network element or based on the information provided by the (MB)SMF, that is, the same cell is connected to different core networks, then the MBSF for the same multicast broadcast service in The same TMGI allocation/mapping rules and multicast IP address allocation rules are used under different core networks.
  • the base station After the base station establishes an MBS session with one of the core networks (corresponding to the first MBS session established by TMGI), the corresponding MBS session UP tunnel is marked with tunnel 1, and the MBSF saves the U-plane tunnel information (tunnel 1) corresponding to the session.
  • the U plane will reconfigure to use tunnel 1, and MBSF will notify the AF layer to generate multicast data packets only based on the IP multicast address corresponding to tunnel 1; or MBSF can parse the AF layer packets, Discard the data packets not corresponding to the IP multicast address of tunnel 1.
  • UE User Equipment
  • MBSF can retain the MBS session information associated with a TMGI established between the base station and all core networks, especially UP tunnel information, such as TMGI, tunnel ID, IP multicast address, etc. and send the UP information to the UE.
  • the base station can choose whether to use one or more UP tunnels to send MBS data for UEs under different core networks.
  • the cell If the MBSF does not find the RAN sharing situation, for example, the cell establishes a transmission channel for a certain service with the core network for the first time, but based on the information provided by the SMF, it is known that the cell is a RAN sharing cell, then interact with the MBSF of other core networks corresponding to the cell to allocate TMGI In other cases, if other MBSFs have already allocated TMGI and there is no conflict with the allocation (the TMGI is not occupied by other services), the existing configuration will be used. If there is a conflict, the TMGI re-allocation will be negotiated; if there is no other MBSF allocation, Then the MBSF can directly perform TMGI allocation. Or, by broadcasting, the first MBSF that performs TMGI allocation broadcasts the TMGI, IP address, and corresponding cell ID assigned to a certain service for use by other MBSFs that need to support RAN sharing.
  • the MBSF will save and broadcast it to other MBSFs for subsequent service transmission.
  • the AF can be notified to stop sending multicast/broadcast data packets to it, or the MBSF can discard the data packets by itself.
  • the SMF finds that there is a RAN sharing situation based on whether the SMF is a shared network element or based on the information provided by the AMF, that is, the same cell is connected to a different core network, and the SMF broadcasts the same multicast
  • the business uses the same TMGI allocation/mapping rules and multicast IP address allocation rules under different core networks. After the base station establishes an MBS session with one of the core networks (corresponding to the first MBS session established by TMGI), the corresponding MBS session UP tunnel is marked with tunnel 1, and the SMF saves the U-plane tunnel information (tunnel1) corresponding to the session.
  • the U plane will reconfigure to use tunnel 1, and at the same time, the SMF will notify the AF layer to generate multicast data packets only based on the IP multicast address corresponding to tunnel 1; or the SMF can parse the packets of the AF layer, Discard the data packets not corresponding to the IP multicast address of tunnel 1.
  • the MBS session CP information is configured according to its corresponding core network
  • the U plane is configured according to the first tunnel established in the cell where it is located.
  • the SMF can retain the MBS session information associated with a TMGI established between the base station and all core networks, especially the UP tunnel information, such as TMGI, tunnel ID, IP multicast address, etc.; and send the UP information to the UE .
  • the base station can choose whether to use one or more UP tunnels to send MBS data for UEs under different core networks.
  • the SMF does not find the RAN sharing situation, for example, the cell establishes a transmission channel for a certain service with the core network for the first time, but based on the information provided by the AMF, it is known that the cell is a RAN sharing cell, then interact with the MBSF of other core networks corresponding to the cell to allocate TMGI In this case, if other SMFs have already allocated TMGIs and there is no conflict with their allocations (the TMGIs are not occupied by other services), the existing configuration will be used. If there is a conflict, TMGI re-allocation will be negotiated; if there is no other SMF allocations, Then the SMF can directly perform TMGI allocation. Or, by broadcasting, the first SMF that performs TMGI allocation broadcasts the TMGI, IP address, and corresponding cell ID assigned to a certain service for use by other SMFs that need to support RAN sharing.
  • the SMF For the U-plane information corresponding to the MBS session established between the base station and the core network, the SMF will save and broadcast it to other SMFs for subsequent service transmission. After establishing the SMF of the core network of the MBS session, it can notify the AF to stop sending multicast/broadcast data packets to it, or the SMF can discard the data packets by itself.
  • the embodiment of the present disclosure also provides a method for transmitting a multicast broadcast service, which is executed by an access network element, as shown in FIG. 4 , this embodiment includes:
  • Step 201 receiving TMGI allocation information sent by a network element of the core network, the TMGI allocation information including the mapping relationship between TMGI and multicast broadcast service MBS;
  • Step 202 Determine whether the same MBS is sent from different core network elements according to the TMGI allocation information, and if so, select the first user plane tunnel of one or more MBS sessions as the basic transmission channel;
  • Step 203 Send notification information to the application function entity AF, informing AF to stop sending multicast or broadcast data packets to the core network where the second user plane tunnel except the first user plane tunnel is located, or discard the second user plane tunnel Tunneled multicast or broadcast packets.
  • the method before receiving the TMGI allocation information sent by the core network element, the method further includes:
  • the method also includes:
  • Reserving a plurality of UP channels dynamically selecting one or more of the UP channels as the UP channel for the terminal under the network element of the access network to receive the MBS, and sending the UP information corresponding to the UP channel to the terminal.
  • the information on which the UP channel is selected includes at least one of the following:
  • the priority information of the channel tunnel provided by the network element of the core network such as the tunnel corresponding to a certain service provided by MBSF, and provided to UE in descending order;
  • the network element of the core network is a session management function SMF or MBSF.
  • the access network element when the base station establishes an interface with the core network, it provides information indicating that it is a RAN sharing node and supports MBS information.
  • the core network sends the TMGI/MBS session and MBS service mapping information (list) to the base station according to the information. Possibly, the mapping (list) may be provided when the interface is established, or may be provided when the MBS session is established. It may be MBSF or SMF that provides this information (list).
  • the base station Based on the TMGI/MBS session and MBS service mapping information (list) provided by multiple core networks, the base station checks whether the same multicast broadcast service is sent from multiple different core networks. If so, the base station selects one of them or Multiple MBS session U-side tunnels are used as the basic transmission channel, and the AF can be notified through the core network SMF/MBSF where other MBS sessions are located to stop sending multicast service packets to the core network where the unselected tunnels are located, or the AF is not notified, but in the base station Do discard everywhere. The base station sends a reconfiguration message to the terminal to reconfigure the UP channel of the UE to a newly selected UP channel.
  • the base station reserves multiple UP channels, dynamically selects one or more of them as the UP channel for the UE under the node to receive the multicast service, and provides corresponding UP information to the UE. For multiple selections, all UP tunnel information will be provided to UE.
  • An embodiment of the present disclosure also provides a multicast broadcast service transmission device, which is applied to a core network element, as shown in FIG. 5 , including a transceiver 11 and a processor 12,
  • the processor 12 is used to interact with other network elements of the core network on the allocation of the temporary mobile group identifier TMGI if it is judged that there is a sharing of network elements in the access network, and use the same TMGI for the same multicast broadcast service MBS under different core networks.
  • TMGI distribution rules
  • the transceiver 11 is used to send TMGI allocation information to an access network element, and the TMGI allocation information includes the mapping relationship between TMGI and MBS.
  • the processor 12 is further configured to allocate the same multicast IP address to the same MBS under different core networks.
  • the processor 12 is further configured to save the user plane tunnel corresponding to the MBS session after the access network element establishes an MBS session with a core network Information tunnel 1, for MBS sessions established with other core networks after the access network element, reconfigure and use tunnel 1;
  • the transceiver 11 is further configured to send first indication information to the application function entity AF, indicating that the first multicast data packet is generated only based on the IP multicast address corresponding to tunnel 1; or, analyzing the data packet of the application function entity, Discarding other data packets except the first multicast data packet.
  • the processor 12 is further configured to configure the MBS session CP information according to the core network corresponding to the terminal when the terminal joins the multicast group, and configure the CP information according to the terminal
  • the tunnel first established in the cell where the cell resides configures the user plane of the terminal.
  • the processor 12 is further configured to reserve the MBS session associated with the first TMGI established between the access network element and the core network element information, the MBS session information includes UP tunnel information, and the UP tunnel information includes at least one of the following: TMGI, tunnel identifier, IP multicast address;
  • the transceiver 11 is also used to send the UP tunnel information to the terminal.
  • the processor 12 is specifically used for interacting TMGI allocation with corresponding network elements of other core networks associated with network elements of the access network; if the corresponding network elements of other core networks have performed TMGI allocation, one of the core networks is The second TMGI allocated by an MBS does not conflict with the third TMGI allocated by itself for the MBS, and the third TMGI is configured for the MBS; the allocated second TMGI conflicts with the third TMGI allocated by itself for the MBS, The core network elements negotiate to perform TMGI reallocation; if other core network elements do not perform TMGI allocation, directly allocate a third TMGI to the MBS.
  • the transceiver 11 is further configured to broadcast the TMGI, the IP address and the corresponding cell identifier assigned to the MBS among corresponding network elements of multiple different core networks.
  • the processor 12 is further configured to store and broadcast first user plane information, where the first user plane information is the network element of the access network and the network element of the access network.
  • first user plane information is the network element of the access network and the network element of the access network.
  • the transceiver 11 is further configured to receive first user plane information, the first user plane information is the network element of the access network and other core network The user plane information and associated control plane information of the MBS session established between network elements; notify the AF to stop sending multicast or broadcast data packets to the MBS, or discard the data packets of the MBS by itself.
  • the network element of the core network is a session management function SMF or MBSF.
  • the network element of the core network is an MBSF
  • the processor 12 is specifically configured to determine whether there is radio access network sharing based on whether the MBSF is a shared network element;
  • the core network element is an SMF
  • the transceiver 11 is further configured to receive second indication information sent by the access and mobility function AMF, indicating that the access network element is a shared access network network element and supports MBS;
  • the processor 12 is specifically configured to select, based on the second indication information, an MBSF that has established interfaces with other core network elements, or an MBSF that supports sharing.
  • An embodiment of the present disclosure also provides a multicast broadcast service transmission device, which is applied to an access network element, as shown in FIG. 5 , including a transceiver 11 and a processor 12,
  • the transceiver 11 is configured to receive TMGI allocation information sent by a core network element, and the TMGI allocation information includes a mapping relationship between TMGI and a multicast broadcast service MBS;
  • the processor 12 is configured to determine whether the same MBS is sent from different core network elements according to the TMGI allocation information, and if so, select the first user plane tunnel of one or more MBS sessions as the basic transmission channel;
  • the transceiver 11 is further configured to send notification information to the application function entity AF, instructing the AF to stop sending multicast or broadcast data packets to the core network where the second user plane tunnel other than the first user plane tunnel is located, or, Discard multicast or broadcast packets for the second user plane tunnel.
  • the transceiver 11 is further configured to send third indication information to the access and mobility function AMF, indicating that the access network element is a shared access network element and supports MBS.
  • the transceiver 11 is further configured to send a reconfiguration message to the terminal, reconfiguring the UP channel of the terminal to the selected UP channel;
  • Reserving a plurality of UP channels dynamically selecting one or more of the UP channels as the UP channel for the terminal under the network element of the access network to receive the MBS, and sending the UP information corresponding to the UP channel to the terminal.
  • the information on which the UP channel is selected includes at least one of the following:
  • the priority information of the channel tunnel provided by the core network element
  • the network element of the core network is a session management function SMF or MBSF.
  • An embodiment of the present disclosure also provides a multicast broadcast service transmission device, as shown in FIG. ; When the processor 22 executes the program, the above multicast broadcast service transmission method is realized.
  • the multicast broadcast service transmission device is applied to a network element of the core network, and the processor 22 is configured to interact with other network elements of the core network to allocate a temporary mobile group identifier TMGI if it is judged that there is sharing of network elements of the access network
  • TMGI allocation rule is adopted under different core networks for the same multicast broadcast service MBS; the TMGI allocation information is sent to the network element of the access network, and the TMGI allocation information includes the mapping relationship between TMGI and MBS.
  • the processor 22 is further configured to allocate the same multicast IP address to the same MBS under different core networks.
  • the processor 22 is further configured to save the user plane tunnel corresponding to the MBS session after the access network element establishes an MBS session with a core network Information tunnel 1, for the MBS session established between the access network element and other core networks, use tunnel 1 for reconfiguration; send the first indication information to the application function entity AF, indicating that it is only based on the IP multicast address corresponding to tunnel 1 generating a first multicast data packet; or, parsing the data packet of the application function entity, and discarding other data packets except the first multicast data packet.
  • the processor 22 is further configured to configure the MBS session CP information according to the core network corresponding to the terminal when the terminal joins the multicast group, and configure the CP information according to the terminal
  • the tunnel first established in the cell where the cell resides configures the user plane of the terminal.
  • the processor 22 is further configured to reserve the MBS session associated with the first TMGI established between the access network element and the core network element information, the MBS session information includes UP tunnel information, and the UP tunnel information includes at least one of the following: TMGI, tunnel identifier, and IP multicast address; and sends the UP tunnel information to the terminal.
  • the processor 22 is specifically used for interacting TMGI allocation with corresponding network elements of other core networks associated with network elements of the access network; if the corresponding network elements of other core networks have performed TMGI allocation, one of the core networks is The second TMGI allocated by an MBS does not conflict with the third TMGI allocated by itself for the MBS, and the third TMGI is configured for the MBS; the allocated second TMGI conflicts with the third TMGI allocated by itself for the MBS, The core network elements negotiate to perform TMGI reallocation; if other core network elements do not perform TMGI allocation, directly allocate a third TMGI to the MBS.
  • the processor 22 is further configured to broadcast the TMGI, the IP address and the corresponding cell identifier assigned to the MBS among corresponding network elements of multiple different core networks.
  • the processor 22 is further configured to store and broadcast first user plane information, where the first user plane information is the network element of the access network and the network element of the access network.
  • first user plane information is the network element of the access network and the network element of the access network.
  • the processor 22 is further configured to receive first user plane information, and the first user plane information is a combination of the access network element and other core network information.
  • the user plane information and associated control plane information of the MBS session established between network elements; notify the AF to stop sending multicast or broadcast data packets to the MBS, or discard the data packets of the MBS by itself.
  • the core network element is a session management function SMF or MBSF.
  • the network element of the core network is an MBSF
  • the processor is specifically configured to determine whether there is radio access network sharing based on whether the MBSF is a shared network element;
  • the core network element is an SMF
  • the processor 22 is further configured to receive second indication information sent by the access and mobility function AMF, indicating that the access network element is a shared access network
  • the network element also supports MBS; and based on the second indication information, selects an MBSF that has established an interface with other core network elements, or supports a shared MBSF.
  • the multicast broadcast service transmission device is applied to an access network element, and the processor 22 is configured to receive TMGI allocation information sent by a core network element, and the TMGI allocation information includes TMGI and multicast broadcast service A mapping relationship between MBSs; judging whether the same MBS is sent from different core network elements according to the TMGI allocation information, and if so, selecting the first user plane tunnel of one or more MBS sessions as the basic transmission channel; Send notification information to the application function entity AF, informing AF to stop sending multicast or broadcast data packets to the core network where the second user plane tunnel except the first user plane tunnel is located, or discard the multicast or broadcast data packets of the second user plane tunnel. broadcast or broadcast packets.
  • the processor 22 is further configured to send third indication information to the access and mobility function AMF, indicating that the access network element is a shared access network element and supports MBS.
  • the processor 22 is further configured to send a reconfiguration message to the terminal, reconfiguring the UP channel of the terminal to the selected UP channel;
  • Reserving a plurality of UP channels dynamically selecting one or more of the UP channels as the UP channel for the terminal under the network element of the access network to receive the MBS, and sending the UP information corresponding to the UP channel to the terminal.
  • the information on which the UP channel is selected includes at least one of the following:
  • the priority information of the channel tunnel provided by the core network element
  • the network element of the core network is a session management function SMF or MBSF.
  • An embodiment of the present disclosure also provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps in the above-mentioned multicast broadcast service transmission method are implemented.
  • Computer-readable media including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information.
  • Information may be computer readable instructions, data structures, modules of a program, or other data.
  • Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Flash memory or other memory technology, Compact Disc Read-Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage terminal devices or any other non-transmission medium that may be used to store information that can be accessed by a computing terminal device.
  • computer readable media does not include transitory media, such as modulated data signals and carrier waves.

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Abstract

本公开提供了一种多播广播业务传输方法及装置，属于无线技术领域。多播广播业务传输方法，由核心网网元执行，包括：若判断存在接入网网元共享情况，与其他核心网网元交互临时移动群组标识TMGI分配情况，为同一多播广播业务MBS在不同核心网下采用相同的TMGI分配规则；将TMGI分配信息发送给接入网网元，所述TMGI分配信息包括TMGI与MBS之间的映射关系。

Description

多播广播业务传输方法及装置
相关申请的交叉引用
本申请主张在2021年11月12日在中国提交的中国专利申请号No.202111340499.7的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及无线技术领域，特别是指一种多播广播业务传输方法及装置。
背景技术
多播广播是一种从一个数据源向多个目标移动终端传输数据的技术，实现了网络(包括核心网和接入网)资源的共享，提高了网络资源，尤其是空口资源的利用率。核心网会根据应用层提供的信息，为多播广播业务提供第三代伙伴组织计划(Third Generation Partnership Projects，3GPP)网络中标识(临时移动群组标识(Temporary Mobile Group Identity，TMGI))于核心网侧与无线侧建立多播广播业务传输所用的通道，并进行相关调度。
相关通信技术支持网络共享，包含无线侧共享和核心网共享，通过网络共享可以尽量避免网络基础设施的重复建设，节约网络整体投资。
在无线接入网共享(Radio Access Network sharing，RAN sharing)核心网(Core Network，CN)不共享的情况下，不同运营商对于同一个多播业务可能分配不同的TMGI，因此在无线侧相同的覆盖范围内，基站可能对该业务重复传输，造成资源的浪费
发明内容
本公开要解决的技术问题是提供一种多播广播业务传输方法及装置，能够识别相同的多播广播业务，不重复传输同一多播广播业务，减少资源浪费。
为解决上述技术问题，本公开的实施例提供技术方案如下：
一方面，提供一种多播广播业务传输方法，由核心网网元执行，包括：
若判断存在接入网网元共享情况，与其他核心网网元交互临时移动群组标识TMGI分配情况，为同一多播广播业务MBS在不同核心网下采用相同的TMGI分配规则；
将TMGI分配信息发送给接入网网元，所述TMGI分配信息包括TMGI与MBS之间的映射关系。
一些实施例中，若判断存在无线接入网共享情况，所述方法还包括：
为同一MBS在不同核心网下分配相同的多播IP地址。
一些实施例中，若判断存在接入网网元共享情况，所述方法还包括：
在所述接入网网元与一核心网建立MBS会话后，保存该MBS会话对应的用户面隧道信息tunnel 1，对于所述接入网网元之后与其他核心网建立的MBS会话，重配使用tunnel 1；
向应用功能实体AF发送第一指示信息，指示仅基于tunnel 1对应的IP多播地址生成第一多播数据包；或，解析所述应用功能实体的数据包，将除所述第一多播数据包之外的其他数据包丢弃。
一些实施例中，若判断存在接入网网元共享情况，所述方法还包括：
在终端加入多播组时，按照所述终端对应的核心网配置MBS会话CP信息，按照所述终端所在小区第一个建立的tunnel配置所述终端的用户面。
一些实施例中，若判断存在接入网网元共享情况，所述方法还包括：
保留所述接入网网元与所述核心网网元间建立的与第一TMGI关联的MBS会话信息，所述MBS会话信息包括UP隧道信息，所述UP隧道信息包括以下至少一项：TMGI，tunnel标识，IP多播地址；
将所述UP隧道信息发送给终端。
一些实施例中，为同一多播广播业务MBS在不同核心网下采用相同的TMGI分配规则包括：
与接入网网元关联的其他核心网对应网元交互TMGI分配情况；
若其他核心网的对应网元已进行TMGI分配，其中一核心网为一MBS分配的第二TMGI与自身为该MBS分配的第三TMGI没有冲突，为所述MBS配置所述第三TMGI；分配的第二TMGI与自身为该MBS分配的第三TMGI 冲突，与其他核心网网元协商进行TMGI重分配；
若其他核心网网元未进行TMGI分配，直接为MBS分配第三TMGI。
一些实施例中，直接为MBS分配第三TMGI之后，所述方法还包括：
在多个不同核心网的对应网元间广播为MBS分配的TMGI、IP地址及对应的小区标识。
一些实施例中，若判断存在接入网网元共享情况，所述方法还包括：
保存并广播第一用户面信息，所述第一用户面信息为所述接入网网元与所述核心网网元间建立的MBS会话的用户面信息及关联的控制面信息。
一些实施例中，若判断存在接入网网元共享情况，所述方法还包括：
接收第一用户面信息，所述第一用户面信息为所述接入网网元与其他核心网网元间建立的MBS会话的用户面信息及关联的控制面信息；
通知AF停止对所述MBS发送多播或广播数据包，或，自行丢弃所述MBS的数据包。
一些实施例中，所述核心网网元为会话管理功能SMF或多播广播服务功能MBSF。
一些实施例中，所述核心网网元为MBSF，判断是否存在无线接入网共享情况包括：
基于MBSF是否为共享网元判断是否存在无线接入网共享情况；或
基于SMF提供的信息判断是否存在无线接入网共享情况。
一些实施例中，所述核心网网元为SMF，判断存在接入网网元共享情况之前，所述方法还包括：
接收接入和移动性功能AMF发送的第二指示信息，指示所述接入网网元为共享接入网网元并且支持MBS；
基于所述第二指示信息选择已与其他核心网网元建立接口的MBSF，或，支持共享的MBSF。
本公开实施例还提供了一种多播广播业务传输方法，由接入网网元执行，包括：
接收核心网网元发送的TMGI分配信息，所述TMGI分配信息包括TMGI 与多播广播业务MBS之间的映射关系；
根据所述TMGI分配信息判断是否存在同一MBS从不同核心网网元发送的情况，若存在，选择其中一个或多个MBS会话的第一用户面隧道作为基本传输通道；
向应用功能实体AF发送通知信息，通知AF停止对除所述第一用户面隧道之外的第二用户面隧道所在核心网发送多播或广播数据包，或，丢弃第二用户面隧道的多播或广播数据包。
一些实施例中，接收核心网网元发送的TMGI分配信息之前，所述方法还包括：
向接入和移动性功能AMF发送第三指示信息，指示所述接入网网元为共享接入网网元并且支持MBS。
一些实施例中，所述方法还包括：
向终端发送重配消息，将终端的用户面UP通道重配为选择的UP通道；或
保留多个UP通道，动态选择其中一个或多个UP通道作为该接入网网元下终端接收MBS的UP通道，并将所述UP通道对应的UP信息发送给所述终端。
一些实施例中，选择UP通道依据的信息包括以下至少一项：
核心网网元提供的通道tunnel的优先级信息；
tunnel建立的时间；
是否为特定业务专用tunnel；
tunnel的传输速率；
不同核心网网元对MBS的优先级。
一些实施例中，所述核心网网元为会话管理功能SMF或MBSF。
本公开实施例还提供了一种多播广播业务传输装置，应用于核心网网元，包括收发机和处理器，
所述处理器用于若判断存在接入网网元共享情况，与其他核心网网元交互临时移动群组标识TMGI分配情况，为同一多播广播业务MBS在不同核心 网下采用相同的TMGI分配规则；
所述收发机用于将TMGI分配信息发送给接入网网元，所述TMGI分配信息包括TMGI与MBS之间的映射关系。
一些实施例中，若判断存在无线接入网共享情况，所述处理器还用于为同一MBS在不同核心网下分配相同的多播IP地址。
一些实施例中，若判断存在接入网网元共享情况，所述处理器还用于在所述接入网网元与一核心网建立MBS会话后，保存该MBS会话对应的用户面隧道信息tunnel 1，对于所述接入网网元之后与其他核心网建立的MBS会话，重配使用tunnel 1；
所述收发机还用于向应用功能实体AF发送第一指示信息，指示仅基于tunnel 1对应的IP多播地址生成第一多播数据包；或，解析所述应用功能实体的数据包，将除所述第一多播数据包之外的其他数据包丢弃。
一些实施例中，若判断存在接入网网元共享情况，所述处理器还用于在终端加入多播组时，按照所述终端对应的核心网配置MBS会话CP信息，按照所述终端所在小区第一个建立的tunnel配置所述终端的用户面。
一些实施例中，若判断存在接入网网元共享情况，所述处理器还用于保留所述接入网网元与所述核心网网元间建立的与第一TMGI关联的MBS会话信息，所述MBS会话信息包括UP隧道信息，所述UP隧道信息包括以下至少一项：TMGI，tunnel标识，IP多播地址；
所述收发机还用于将所述UP隧道信息发送给终端。
一些实施例中，所述处理器具体用于
与接入网网元关联的其他核心网对应网元交互TMGI分配情况；若其他核心网的对应网元已进行TMGI分配，其中一核心网为一MBS分配的第二TMGI与自身为该MBS分配的第三TMGI没有冲突，为所述MBS配置所述第三TMGI；分配的第二TMGI与自身为该MBS分配的第三TMGI冲突，与其他核心网网元协商进行TMGI重分配；若其他核心网网元未进行TMGI分配，直接为MBS分配第三TMGI。
一些实施例中，所述收发机还用于在多个不同核心网的对应网元间广播 为MBS分配的TMGI、IP地址及对应的小区标识。
一些实施例中，若判断存在接入网网元共享情况，所述处理器还用于保存并广播第一用户面信息，所述第一用户面信息为所述接入网网元与所述核心网网元间建立的MBS会话的用户面信息及关联的控制面信息。
一些实施例中，若判断存在接入网网元共享情况，所述收发机还用于接收第一用户面信息，所述第一用户面信息为所述接入网网元与其他核心网网元间建立的MBS会话的用户面信息及关联的控制面信息；通知AF停止对所述MBS发送多播或广播数据包，或，自行丢弃所述MBS的数据包。
一些实施例中，所述核心网网元为会话管理功能SMF或MBSF。
一些实施例中，所述核心网网元为MBSF，所述处理器具体用于基于MBSF是否为共享网元判断是否存在无线接入网共享情况；或
基于SMF提供的信息判断是否存在无线接入网共享情况。
一些实施例中，所述核心网网元为SMF，所述收发机还用于接收接入和移动性功能AMF发送的第二指示信息，指示所述接入网网元为共享接入网网元并且支持MBS；
所述处理器具体用于基于所述第二指示信息选择已与其他核心网网元建立接口的MBSF，或，支持共享的MBSF。
本公开实施例还提供了一种多播广播业务传输装置，应用于接入网网元，包括收发机和处理器，
所述收发机用于接收核心网网元发送的TMGI分配信息，所述TMGI分配信息包括TMGI与多播广播业务MBS之间的映射关系；
所述处理器用于根据所述TMGI分配信息判断是否存在同一MBS从不同核心网网元发送的情况，若存在，选择其中一个或多个MBS会话的第一用户面隧道作为基本传输通道；
所述收发机还用于向应用功能实体AF发送通知信息，通知AF停止对除所述第一用户面隧道之外的第二用户面隧道所在核心网发送多播或广播数据包，或，丢弃第二用户面隧道的多播或广播数据包。
一些实施例中，所述收发机还用于向接入和移动性功能AMF发送第三指 示信息，指示所述接入网网元为共享接入网网元并且支持MBS。
一些实施例中，所述收发机还用于向终端发送重配消息，将终端的用户面UP通道重配为选择的UP通道；或
保留多个UP通道，动态选择其中一个或多个UP通道作为该接入网网元下终端接收MBS的UP通道，并将所述UP通道对应的UP信息发送给所述终端。
一些实施例中，选择UP通道依据的信息包括以下至少一项：
核心网网元提供的通道tunnel的优先级信息；
tunnel建立的时间；
是否为特定业务专用tunnel；
tunnel的传输速率；
不同核心网网元对MBS的优先级。
一些实施例中，所述核心网网元为会话管理功能SMF或MBSF。
本公开实施例还提供了一种多播广播业务传输装置，包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序；所述处理器执行所述程序时实现如上所述的多播广播业务传输方法。
一些实施例中，多播广播业务传输装置应用于核心网网元，所述处理器用于若判断存在接入网网元共享情况，与其他核心网网元交互临时移动群组标识TMGI分配情况，为同一多播广播业务MBS在不同核心网下采用相同的TMGI分配规则；将TMGI分配信息发送给接入网网元，所述TMGI分配信息包括TMGI与MBS之间的映射关系。
一些实施例中，若判断存在无线接入网共享情况，所述处理器还用于为同一MBS在不同核心网下分配相同的多播IP地址。
一些实施例中，若判断存在接入网网元共享情况，所述处理器还用于在所述接入网网元与一核心网建立MBS会话后，保存该MBS会话对应的用户面隧道信息tunnel 1，对于所述接入网网元之后与其他核心网建立的MBS会话，重配使用tunnel 1；向应用功能实体AF发送第一指示信息，指示仅基于tunnel 1对应的IP多播地址生成第一多播数据包；或，解析所述应用功能实 体的数据包，将除所述第一多播数据包之外的其他数据包丢弃。
一些实施例中，若判断存在接入网网元共享情况，所述处理器还用于在终端加入多播组时，按照所述终端对应的核心网配置MBS会话CP信息，按照所述终端所在小区第一个建立的tunnel配置所述终端的用户面。
一些实施例中，若判断存在接入网网元共享情况，所述处理器还用于保留所述接入网网元与所述核心网网元间建立的与第一TMGI关联的MBS会话信息，所述MBS会话信息包括UP隧道信息，所述UP隧道信息包括以下至少一项：TMGI，tunnel标识，IP多播地址；将所述UP隧道信息发送给终端。
一些实施例中，所述处理器具体用于与与接入网网元关联的其他核心网对应网元交互TMGI分配情况；若其他核心网的对应网元已进行TMGI分配，其中一核心网为一MBS分配的第二TMGI与自身为该MBS分配的第三TMGI没有冲突，为所述MBS配置所述第三TMGI；分配的第二TMGI与自身为该MBS分配的第三TMGI冲突，与其他核心网网元协商进行TMGI重分配；若其他核心网网元未进行TMGI分配，直接为MBS分配第三TMGI。
一些实施例中，所述处理器还用于在多个不同核心网的对应网元间广播为MBS分配的TMGI、IP地址及对应的小区标识。
一些实施例中，若判断存在接入网网元共享情况，所述处理器还用于保存并广播第一用户面信息，所述第一用户面信息为所述接入网网元与所述核心网网元间建立的MBS会话的用户面信息及关联的控制面信息。
一些实施例中，若判断存在接入网网元共享情况，所述处理器还用于接收第一用户面信息，所述第一用户面信息为所述接入网网元与其他核心网网元间建立的MBS会话的用户面信息及关联的控制面信息；通知AF停止对所述MBS发送多播或广播数据包，或，自行丢弃所述MBS的数据包。
一些实施例中，所述核心网网元为会话管理功能SMF或MBSF。
一些实施例中，所述核心网网元为MBSF，所述处理器具体用于基于MBSF是否为共享网元判断是否存在无线接入网共享情况；或
基于SMF提供的信息判断是否存在无线接入网共享情况。
一些实施例中，所述核心网网元为SMF，所述处理器还用于接收接入和 移动性功能AMF发送的第二指示信息，指示所述接入网网元为共享接入网网元并且支持MBS；基于所述第二指示信息选择已与其他核心网网元建立接口的MBSF，或，支持共享的MBSF。
一些实施例中，多播广播业务传输装置，应用于接入网网元，所述处理器用于接收核心网网元发送的TMGI分配信息，所述TMGI分配信息包括TMGI与多播广播业务MBS之间的映射关系；根据所述TMGI分配信息判断是否存在同一MBS从不同核心网网元发送的情况，若存在，选择其中一个或多个MBS会话的第一用户面隧道作为基本传输通道；向应用功能实体AF发送通知信息，通知AF停止对除所述第一用户面隧道之外的第二用户面隧道所在核心网发送多播或广播数据包，或，丢弃第二用户面隧道的多播或广播数据包。
一些实施例中，所述处理器还用于向接入和移动性功能AMF发送第三指示信息，指示所述接入网网元为共享接入网网元并且支持MBS。
一些实施例中，所述处理器还用于向终端发送重配消息，将终端的UP通道重配为选择的UP通道；或
保留多个UP通道，动态选择其中一个或多个UP通道作为该接入网网元下终端接收MBS的UP通道，并将所述UP通道对应的UP信息发送给所述终端。
一些实施例中，选择UP通道依据的信息包括以下至少一项：
核心网网元提供的通道tunnel的优先级信息；
tunnel建立的时间；
是否为特定业务专用tunnel；
tunnel的传输速率；
不同核心网网元对MBS的优先级。
一些实施例中，所述核心网网元为会话管理功能SMF或MBSF。
本公开实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现如上所述的多播广播业务传输方法中的步骤。
本公开的实施例具有以下有益效果：
上述方案中，若核心网网元判断存在接入网网元共享RAN sharing情况，将与其他核心网网元交互TMGI分配情况，为同一MBS在不同核心网下采用相同的TMGI分配规则，可以避免在RAN sharing部署下，从核心网到接入网，对多播广播业务的重复传输。
附图说明
图1为多播广播网络的架构示意图；
图2为RAN sharing的示意图；
图3和图4为本公开实施例多播广播业务传输方法的流程示意图；
图5为本公开实施例多播广播业务传输装置的结构示意图；
图6为本公开实施例多播广播业务传输装置的组成示意图。
具体实施方式
为使本公开的实施例要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
图1为多播广播网络架构的示意图，其中，MBSF负责临时移动群组标识(TMGI)分配和业务管理(service management)，与多播广播(Multicast Broadcast，MB)会话管理功能(Session Management Function，SMF)和应用功能(Application Function，AF)交互。其中，N2为N2接口，为接入网与AMF间的信令面接口，N3为N3接口，为接入网与UPF之间的接口，可承载用户面从接入网到UPF之间的用户面数据传递，图1中MB-N3接口可以理解是接入网与多播-用户平面功能之间的接口，N4为N4接口，是SMF与UPF之间的接口，N6为N6接口，用户面功能(例如图1中多播-用户平面功能)与用户(例如图1中单频多播-用户)之间可通过N6接口进行通信，，MB2-U为MB2-U接口，用户面功能(例如图1中多播-用户平面功能)可通过N6/MB2-U接口与应用功能通信，N7为N7接口，为SMF与策略控制功能(Policy Control Function，PCF)之间的接口，N9为N9接口，是UPF之间的接口，图1中MB-N9可以理解是多播-用户平面功能与用户平面功能之 间的接口，N11为N11接口，是AMF与SMF之间的接口，N15为N15接口，是AMF与PCF之间的接口，N16a为N16a接口，是SMF之间的接口，N33为N33接口，是网络开放功能(Network Exposure Function，NEF)与AF之间的接口，Npcf为Npcf接口，是PCF提供的服务化接口，Nmbsmf即Nmbsmf接口，多播-会话管理功能(MB-SMF)与网络开放功能以及单频多播-中心之间可通过Nmbsmf接口进行通信，Nmbsu即Nmbsu接口，单频多播-中心与单频多播-用户之间可通过Nmbsu接口通信，xMB-C即xMB-C接口，MB2-C即MB2-C接口，单频多播-中心可通过xMB-C/MB2-C，与网络开放功能以及应用功能通信，xMB-U即xMB-U接口，MB2-U即MB2-U接口，单频多播-用户可通过xMB-U/MB2-U与应用功能通信。
相关通信技术支持网络共享，包含无线侧共享和核心网共享，如图2所示为RAN sharing(无线接入网共享)的示意图，通过网络共享可以尽量避免网络基础设施的重复建设，节约网络整体头投资。
在RAN sharing(无线接入网共享，核心网不共享)的情况下，不同运营商(CN)对于同一个多播业务可能分配不同的TMGI，因此在无线侧相同的覆盖范围内，基站可能对该业务重复传输，造成资源的浪费。
本公开实施例提供一种多播广播业务传输方法及装置，能够识别相同的多播广播业务，不重复传输同一多播广播业务，减少资源浪费。
本公开的实施例提供一种多播广播业务传输方法，由核心网网元执行，如图3所示，包括：
步骤101：若判断存在接入网网元共享情况，与其他核心网网元交互临时移动群组标识TMGI分配情况，为同一多播广播业务MBS在不同核心网下采用相同的TMGI分配规则；
步骤102：将TMGI分配信息发送给接入网网元，所述TMGI分配信息包括TMGI与MBS之间的映射关系。
本实施例中，若核心网网元判断存在接入网网元共享RAN sharing情况，将与其他核心网网元交互TMGI分配情况，为同一多播广播业务(Multicast Broadcast Service，MBS)在不同核心网下采用相同的TMGI分配规则，可以 避免在RAN sharing部署下，从核心网到接入网，对多播广播业务的重复传输。
一些实施例中，若判断存在无线接入网共享情况，所述方法还包括：
为同一MBS在不同核心网下分配相同的多播互联网协议(Internet Protocol，IP)地址。
一些实施例中，若判断存在接入网网元共享情况，所述方法还包括：
在所述接入网网元与一核心网建立MBS会话后，保存该MBS会话对应的用户面隧道信息(tunnel 1)，对于所述接入网网元之后与其他核心网建立的MBS会话，重配使用tunnel 1；
向应用功能实体AF发送第一指示信息，指示仅基于tunnel 1对应的IP多播地址生成第一多播数据包；或，解析所述应用功能实体的数据包，将除所述第一多播数据包之外的其他数据包丢弃。
一些实施例中，若判断存在接入网网元共享情况，所述方法还包括：
在终端加入多播组时，按照所述终端对应的核心网配置MBS会话控制面(Control Plane，CP)信息，按照所述终端所在小区第一个建立的隧道(tunnel)配置所述终端的用户面。
一些实施例中，若判断存在接入网网元共享情况，所述方法还包括：
保留所述接入网网元与所述核心网网元间建立的与第一TMGI关联的MBS会话信息，所述MBS会话信息包括用户面(User Plane，UP)隧道信息，所述UP隧道信息包括以下至少一项：TMGI，tunnel标识，IP多播地址；
将所述UP隧道信息发送给终端。
一些实施例中，为同一多播广播业务MBS在不同核心网下采用相同的TMGI分配规则包括：
与接入网网元关联的其他核心网对应网元交互TMGI分配情况；
若其他核心网的对应网元已进行TMGI分配，其中一核心网为一MBS分配的第二TMGI与自身为该MBS分配的第三TMGI没有冲突，为所述MBS配置所述第三TMGI；分配的第二TMGI与自身为该MBS分配的第三TMGI冲突，与其他核心网网元协商进行TMGI重分配；
若其他核心网网元未进行TMGI分配，直接为MBS分配第三TMGI。
一些实施例中，直接为MBS分配第三TMGI之后，所述方法还包括：
在多个不同核心网的对应网元间广播为MBS分配的TMGI、IP地址及对应的小区标识。
一些实施例中，若判断存在接入网网元共享情况，所述方法还包括：
保存并广播第一用户面信息，所述第一用户面信息为所述接入网网元与所述核心网网元间建立的MBS会话的用户面信息及关联的控制面信息。
一些实施例中，若判断存在接入网网元共享情况，所述方法还包括：
接收第一用户面信息，所述第一用户面信息为所述接入网网元与其他核心网网元间建立的MBS会话的用户面信息及关联的控制面信息；
通知AF停止对所述MBS发送多播或广播数据包，或，自行丢弃所述MBS的数据包。
一些实施例中，所述核心网网元为会话管理功能(SMF)或多播广播服务功能(Multicast Broadcast Service Function，MBSF)。
一些实施例中，所述核心网网元为MBSF，判断是否存在无线接入网共享情况包括：
基于MBSF是否为共享网元判断是否存在无线接入网共享情况；或
基于SMF提供的信息判断是否存在无线接入网共享情况。
一些实施例中，所述核心网网元为SMF，判断存在接入网网元共享情况之前，所述方法还包括：
接收接入和移动性功能(Access and Mobility Management Function，AMF)发送的第二指示信息，指示所述接入网网元为共享接入网网元并且支持MBS；
基于所述第二指示信息选择已与其他核心网网元建立接口的MBSF，或，支持共享的MBSF。
本实施例中，接入网网元比如基站在进行AMF选择时，向核心网指示其为共享基站，并指示其支持MBS特性，还可以指示共享的其他运营商信息。AMF提供上述信息给(MB)SMF。
一具体示例中，核心网网元为MBSF。(MB)SMF基于AMF接收的信 息选择MBSF，(MB)SMF优先选择已与其他核心网(MB)SMF建立接口的MBSF，或支持共享的MBSF(也即在多个核心网间共享的MBSF)，之后MBSF进行建立成功反馈，并携带分配的TMGI。
在进行TMGI分配时，若MBSF基于MBSF是否为共享网元或基于(MB)SMF提供的信息发现存在RAN sharing情况，也即相同小区连接了不同核心网，则MBSF对于同一多播广播业务在不同核心网下采用相同的TMGI分配/映射规则，以及多播IP地址分配规则。在基站与其中某个核心网建立MBS session后(对应TMGI首次建立MBS session)，对应的MBS session UP tunnel用tunnel 1标识，MBSF保存该session对应的U面隧道信息(tunnel 1)。对于后续与该基站建立的MBS session，U面将重配使用tunnel 1，同时MBSF通知AF层，仅基于tunnel 1对应的IP多播地址生成多播数据包；或者MBSF可以解析AF层的包，将非与tunnel 1对应的IP多播地址的数据包丢弃。在用户设备(User Equipment，UE)加入多播组时，MBS session CP信息按其对应的核心网配置，U面按照其所在小区第一个建立的tunnel配置。
另外，MBSF可以保留该基站与所有核心网间建立的与某TMGI关联的MBS session信息，特别是UP隧道信息，如TMGI，tunnel ID，IP多播地址等。并将所述UP信息发给UE。基站可选择是否对使用一个或多个UP tunnel为不同核心网下UE发送MBS数据。
若MBSF未发现RAN sharing情况，比如小区首次与核心网建立某业务的传输通道，但基于SMF提供信息，得知该小区为RAN sharing小区，则与该小区对应的其他核心网的MBSF交互TMGI分配情况，若已有其他MBSF进行了TMGI分配，且与其分配没有冲突(该TMGI未被其他业务占用)，则沿用已有配置，若冲突，则协商进行TMGI重分配；若暂无其他MBSF分配，则该MBSF可直接进行TMGI分配。或者，采用广播方式，首个进行TMGI分配的MBSF广播某业务分配的TMGI、IP地址及对应的小区ID等，供其他需要支持RAN sharing的MBSF使用。
对于基站与核心网间建立的某业务对应MBS session的U面信息，MBSF将保存并广播给其他MBSF，用于后续业务传输。后建立MBS session的核心 网的MBSF，可通知AF停止对其发送多播/广播数据包，或MBSF自行丢弃数据包。
一些实施例中，网络中不存在MBSF，则SMF基于SMF是否为共享网元或基于AMF提供的信息发现存在RAN sharing情况，也即相同小区连接了不同核心网，则SMF对于同一多播广播业务在不同核心网下采用相同的TMGI分配/映射规则，以及多播IP地址分配规则。在基站与其中某个核心网建立MBS session后(对应TMGI首次建立MBS session)，对应的MBS session UP tunnel用tunnel 1标识，SMF保存该session对应的U面隧道信息(tunnel1)。对于后续与该基站建立的MBS session，U面将重配使用tunnel 1，同时SMF通知AF层，仅基于tunnel 1对应的IP多播地址生成多播数据包；或者SMF可以解析AF层的包，将非与tunnel 1对应的IP多播地址的数据包丢弃。在UE加入多播组时，MBS session CP信息按其对应的核心网配置，U面按照其所在小区第一个建立的tunnel配置。
另外，SMF可以保留该基站与所有核心网间建立的与某TMGI关联的MBS session信息，特别是UP隧道信息，如TMGI，tunnel ID，IP多播地址等；并将所述UP信息发给UE。基站可选择是否对使用一个或多个UP tunnel为不同核心网下UE发送MBS数据。
若SMF未发现RAN sharing情况，比如小区首次与核心网建立某业务的传输通道，但基于AMF提供信息，得知该小区为RAN sharing小区，则与该小区对应的其他核心网的MBSF交互TMGI分配情况，若已有其他SMF进行了TMGI分配，且与其分配没有冲突(该TMGI未被其他业务占用)，则沿用已有配置，若冲突，则协商进行TMGI重分配；若暂无其他SMF分配，则该SMF可直接进行TMGI分配。或者，采用广播方式，首个进行TMGI分配的SMF广播某业务分配的TMGI、IP地址及对应的小区ID等，供其他需要支持RAN sharing的SMF使用。
对于基站与核心网间建立的某业务对应MBS session的U面信息，SMF将保存并广播给其他SMF，用于后续业务传输。后建立MBS session的核心网的SMF，可通知AF停止对其发送多播/广播数据包，或SMF自行丢弃数 据包。
本公开实施例还提供了一种多播广播业务传输方法，由接入网网元执行，如图4所示，本实施例包括：
步骤201：接收核心网网元发送的TMGI分配信息，所述TMGI分配信息包括TMGI与多播广播业务MBS之间的映射关系；
步骤202：根据所述TMGI分配信息判断是否存在同一MBS从不同核心网网元发送的情况，若存在，选择其中一个或多个MBS会话的第一用户面隧道作为基本传输通道；
步骤203：向应用功能实体AF发送通知信息，通知AF停止对除所述第一用户面隧道之外的第二用户面隧道所在核心网发送多播或广播数据包，或，丢弃第二用户面隧道的多播或广播数据包。
一些实施例中，接收核心网网元发送的TMGI分配信息之前，所述方法还包括：
向接入和移动性功能AMF发送第三指示信息，指示所述接入网网元为共享接入网网元并且支持MBS。
一些实施例中，所述方法还包括：
向终端发送重配消息，将终端的用户面UP通道重配为选择的UP通道；或
保留多个UP通道，动态选择其中一个或多个UP通道作为该接入网网元下终端接收MBS的UP通道，并将所述UP通道对应的UP信息发送给所述终端。
一些实施例中，选择UP通道依据的信息包括以下至少一项：
核心网网元提供的通道tunnel的优先级信息，如MBSF提供某业务对应的tunnel，按降序排列提供UE；
tunnel建立的时间；
是否为特定业务专用tunnel；
tunnel的传输速率；
不同核心网网元对MBS的优先级。
一些实施例中，所述核心网网元为会话管理功能SMF或MBSF。
本实施例中，以接入网网元为基站为例，基站在与核心网接口建立时，提供信息指示其为RAN sharing node及支持MBS信息。核心网根据该信息将TMGI/MBS session与MBS业务映射信息(列表)发送给基站，可能地，该映射(列表)可以是在接口建立时提供的，也可能是在MBS session建立时提供的。提供该信息(列表)的可能是MBSF或SMF。
基站基于多个核心网提供的TMGI/MBS session与MBS业务映射信息(列表)，核对是否存在同一个多播广播业务从多个不同核心网发来的情况，若存在，则基站选择其中一个或者多个MBS session U面tunnel作为基本传输通道，并可通过其他MBS session所在核心网SMF/MBSF通知AF停止对未被选择的tunnel所在核心网发送多播业务包，或不通知AF，但在基站处做丢弃。基站向终端发送重配消息，将UE的UP通道重配为新选择的UP通道。或者，基站保留多个UP通道，动态选择其中一个或多个作为该node下UE接收多播业务的UP通道，并提供相应的UP信息给UE。对于选择多个的情况，所有UP tunnel信息将提供给UE。
本公开实施例还提供了一种多播广播业务传输装置，应用于核心网网元，如图5所示，包括收发机11和处理器12，
所述处理器12用于若判断存在接入网网元共享情况，与其他核心网网元交互临时移动群组标识TMGI分配情况，为同一多播广播业务MBS在不同核心网下采用相同的TMGI分配规则；
所述收发机11用于将TMGI分配信息发送给接入网网元，所述TMGI分配信息包括TMGI与MBS之间的映射关系。
一些实施例中，若判断存在无线接入网共享情况，所述处理器12还用于为同一MBS在不同核心网下分配相同的多播IP地址。
一些实施例中，若判断存在接入网网元共享情况，所述处理器12还用于在所述接入网网元与一核心网建立MBS会话后，保存该MBS会话对应的用户面隧道信息tunnel 1，对于所述接入网网元之后与其他核心网建立的MBS会话，重配使用tunnel 1；
所述收发机11还用于向应用功能实体AF发送第一指示信息，指示仅基于tunnel 1对应的IP多播地址生成第一多播数据包；或，解析所述应用功能实体的数据包，将除所述第一多播数据包之外的其他数据包丢弃。
一些实施例中，若判断存在接入网网元共享情况，所述处理器12还用于在终端加入多播组时，按照所述终端对应的核心网配置MBS会话CP信息，按照所述终端所在小区第一个建立的tunnel配置所述终端的用户面。
一些实施例中，若判断存在接入网网元共享情况，所述处理器12还用于保留所述接入网网元与所述核心网网元间建立的与第一TMGI关联的MBS会话信息，所述MBS会话信息包括UP隧道信息，所述UP隧道信息包括以下至少一项：TMGI，tunnel标识，IP多播地址；
所述收发机11还用于将所述UP隧道信息发送给终端。
一些实施例中，所述处理器12具体用于与接入网网元关联的其他核心网对应网元交互TMGI分配情况；若其他核心网的对应网元已进行TMGI分配，其中一核心网为一MBS分配的第二TMGI与自身为该MBS分配的第三TMGI没有冲突，为所述MBS配置所述第三TMGI；分配的第二TMGI与自身为该MBS分配的第三TMGI冲突，与其他核心网网元协商进行TMGI重分配；若其他核心网网元未进行TMGI分配，直接为MBS分配第三TMGI。
一些实施例中，所述收发机11还用于在多个不同核心网的对应网元间广播为MBS分配的TMGI、IP地址及对应的小区标识。
一些实施例中，若判断存在接入网网元共享情况，所述处理器12还用于保存并广播第一用户面信息，所述第一用户面信息为所述接入网网元与所述核心网网元间建立的MBS会话的用户面信息及关联的控制面信息。
一些实施例中，若判断存在接入网网元共享情况，所述收发机11还用于接收第一用户面信息，所述第一用户面信息为所述接入网网元与其他核心网网元间建立的MBS会话的用户面信息及关联的控制面信息；通知AF停止对所述MBS发送多播或广播数据包，或，自行丢弃所述MBS的数据包。
一些实施例中，所述核心网网元为会话管理功能SMF或MBSF。
一些实施例中，所述核心网网元为MBSF，所述处理器12具体用于基于 MBSF是否为共享网元判断是否存在无线接入网共享情况；或
基于SMF提供的信息判断是否存在无线接入网共享情况。
一些实施例中，所述核心网网元为SMF，所述收发机11还用于接收接入和移动性功能AMF发送的第二指示信息，指示所述接入网网元为共享接入网网元并且支持MBS；
所述处理器12具体用于基于所述第二指示信息选择已与其他核心网网元建立接口的MBSF，或，支持共享的MBSF。
本公开实施例还提供了一种多播广播业务传输装置，应用于接入网网元，如图5所示，包括收发机11和处理器12，
所述收发机11用于接收核心网网元发送的TMGI分配信息，所述TMGI分配信息包括TMGI与多播广播业务MBS之间的映射关系；
所述处理器12用于根据所述TMGI分配信息判断是否存在同一MBS从不同核心网网元发送的情况，若存在，选择其中一个或多个MBS会话的第一用户面隧道作为基本传输通道；
所述收发机11还用于向应用功能实体AF发送通知信息，通知AF停止对除所述第一用户面隧道之外的第二用户面隧道所在核心网发送多播或广播数据包，或，丢弃第二用户面隧道的多播或广播数据包。
一些实施例中，所述收发机11还用于向接入和移动性功能AMF发送第三指示信息，指示所述接入网网元为共享接入网网元并且支持MBS。
一些实施例中，所述收发机11还用于向终端发送重配消息，将终端的UP通道重配为选择的UP通道；或
保留多个UP通道，动态选择其中一个或多个UP通道作为该接入网网元下终端接收MBS的UP通道，并将所述UP通道对应的UP信息发送给所述终端。
一些实施例中，选择UP通道依据的信息包括以下至少一项：
核心网网元提供的通道tunnel的优先级信息；
tunnel建立的时间；
是否为特定业务专用tunnel；
tunnel的传输速率；
不同核心网网元对MBS的优先级。
一些实施例中，所述核心网网元为会话管理功能SMF或MBSF。
本公开实施例还提供了一种多播广播业务传输装置，如图6所示，包括存储器21、处理器22及存储在所述存储器21上并可在所述处理器22上运行的计算机程序；所述处理器22执行所述程序时实现如上所述的多播广播业务传输方法。
一些实施例中，多播广播业务传输装置应用于核心网网元，所述处理器22用于若判断存在接入网网元共享情况，与其他核心网网元交互临时移动群组标识TMGI分配情况，为同一多播广播业务MBS在不同核心网下采用相同的TMGI分配规则；将TMGI分配信息发送给接入网网元，所述TMGI分配信息包括TMGI与MBS之间的映射关系。
一些实施例中，若判断存在无线接入网共享情况，所述处理器22还用于为同一MBS在不同核心网下分配相同的多播IP地址。
一些实施例中，若判断存在接入网网元共享情况，所述处理器22还用于在所述接入网网元与一核心网建立MBS会话后，保存该MBS会话对应的用户面隧道信息tunnel 1，对于所述接入网网元之后与其他核心网建立的MBS会话，重配使用tunnel 1；向应用功能实体AF发送第一指示信息，指示仅基于tunnel 1对应的IP多播地址生成第一多播数据包；或，解析所述应用功能实体的数据包，将除所述第一多播数据包之外的其他数据包丢弃。
一些实施例中，若判断存在接入网网元共享情况，所述处理器22还用于在终端加入多播组时，按照所述终端对应的核心网配置MBS会话CP信息，按照所述终端所在小区第一个建立的tunnel配置所述终端的用户面。
一些实施例中，若判断存在接入网网元共享情况，所述处理器22还用于保留所述接入网网元与所述核心网网元间建立的与第一TMGI关联的MBS会话信息，所述MBS会话信息包括UP隧道信息，所述UP隧道信息包括以下至少一项：TMGI，tunnel标识，IP多播地址；将所述UP隧道信息发送给终端。
一些实施例中，所述处理器22具体用于与接入网网元关联的其他核心网对应网元交互TMGI分配情况；若其他核心网的对应网元已进行TMGI分配，其中一核心网为一MBS分配的第二TMGI与自身为该MBS分配的第三TMGI没有冲突，为所述MBS配置所述第三TMGI；分配的第二TMGI与自身为该MBS分配的第三TMGI冲突，与其他核心网网元协商进行TMGI重分配；若其他核心网网元未进行TMGI分配，直接为MBS分配第三TMGI。
一些实施例中，所述处理器22还用于在多个不同核心网的对应网元间广播为MBS分配的TMGI、IP地址及对应的小区标识。
一些实施例中，若判断存在接入网网元共享情况，所述处理器22还用于保存并广播第一用户面信息，所述第一用户面信息为所述接入网网元与所述核心网网元间建立的MBS会话的用户面信息及关联的控制面信息。
一些实施例中，若判断存在接入网网元共享情况，所述处理器22还用于接收第一用户面信息，所述第一用户面信息为所述接入网网元与其他核心网网元间建立的MBS会话的用户面信息及关联的控制面信息；通知AF停止对所述MBS发送多播或广播数据包，或，自行丢弃所述MBS的数据包。
一些实施例中，所述核心网网元为会话管理功能SMF或MBSF。
一些实施例中，所述核心网网元为MBSF，所述处理器具体用于基于MBSF是否为共享网元判断是否存在无线接入网共享情况；或
基于SMF提供的信息判断是否存在无线接入网共享情况。
一些实施例中，所述核心网网元为SMF，所述处理器22还用于接收接入和移动性功能AMF发送的第二指示信息，指示所述接入网网元为共享接入网网元并且支持MBS；基于所述第二指示信息选择已与其他核心网网元建立接口的MBSF，或，支持共享的MBSF。
一些实施例中，多播广播业务传输装置，应用于接入网网元，所述处理器22用于接收核心网网元发送的TMGI分配信息，所述TMGI分配信息包括TMGI与多播广播业务MBS之间的映射关系；根据所述TMGI分配信息判断是否存在同一MBS从不同核心网网元发送的情况，若存在，选择其中一个或多个MBS会话的第一用户面隧道作为基本传输通道；向应用功能实体AF发 送通知信息，通知AF停止对除所述第一用户面隧道之外的第二用户面隧道所在核心网发送多播或广播数据包，或，丢弃第二用户面隧道的多播或广播数据包。
一些实施例中，所述处理器22还用于向接入和移动性功能AMF发送第三指示信息，指示所述接入网网元为共享接入网网元并且支持MBS。
一些实施例中，所述处理器22还用于向终端发送重配消息，将终端的UP通道重配为选择的UP通道；或
保留多个UP通道，动态选择其中一个或多个UP通道作为该接入网网元下终端接收MBS的UP通道，并将所述UP通道对应的UP信息发送给所述终端。
一些实施例中，选择UP通道依据的信息包括以下至少一项：
核心网网元提供的通道tunnel的优先级信息；
tunnel建立的时间；
是否为特定业务专用tunnel；
tunnel的传输速率；
不同核心网网元对MBS的优先级。
一些实施例中，所述核心网网元为会话管理功能SMF或MBSF。
本公开实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现如上所述的多播广播业务传输方法中的步骤。
计算机可读介质包括永久性和非永久性、可移动和非可移动媒体可以由任何方法或技术来实现信息存储。信息可以是计算机可读指令、数据结构、程序的模块或其他数据。计算机的存储介质的例子包括，但不限于相变内存(PRAM)、静态随机存取存储器(SRAM)、动态随机存取存储器(DRAM)、其他类型的随机存取存储器(RAM)、只读存储器(ROM)、电可擦除可编程只读存储器(EEPROM)、快闪记忆体或其他内存技术、只读光盘只读存储器(CD-ROM)、数字多功能光盘(DVD)或其他光学存储、磁盒式磁带，磁带磁磁盘存储或其他磁性存储待检测终端设备或任何其他非传输介质，可用于存储可以被计算待检测终端设备访问的信息。按照本文中的界定，计算机可读 介质不包括暂存电脑可读媒体(transitory media)，如调制的数据信号和载波。
以上所述是本公开的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (21)

  1. 一种多播广播业务传输方法，由核心网网元执行，包括：
    若判断存在接入网网元共享情况，与其他核心网网元交互临时移动群组标识TMGI分配情况，为同一多播广播业务MBS在不同核心网下采用相同的TMGI分配规则；
    将TMGI分配信息发送给接入网网元，所述TMGI分配信息包括TMGI与MBS之间的映射关系。
  2. 根据权利要求1所述的多播广播业务传输方法，其中，若判断存在无线接入网共享情况，所述方法还包括：
    为同一MBS在不同核心网下分配相同的多播IP地址。
  3. 根据权利要求1所述的多播广播业务传输方法，其中，若判断存在接入网网元共享情况，所述方法还包括：
    在所述接入网网元与一核心网建立MBS会话后，保存该MBS会话对应的用户面隧道信息tunnel 1，对于所述接入网网元之后与其他核心网建立的MBS会话，重配使用tunnel 1；
    向应用功能实体AF发送第一指示信息，指示仅基于tunnel 1对应的IP多播地址生成第一多播数据包；或，解析所述应用功能实体的数据包，将除所述第一多播数据包之外的其他数据包丢弃。
  4. 根据权利要求1所述的多播广播业务传输方法，其中，若判断存在接入网网元共享情况，所述方法还包括：
    在终端加入多播组时，按照所述终端对应的核心网配置MBS会话CP信息，按照所述终端所在小区第一个建立的tunnel配置所述终端的用户面。
  5. 根据权利要求1所述的多播广播业务传输方法，其中，若判断存在接入网网元共享情况，所述方法还包括：
    保留所述接入网网元与所述核心网网元间建立的与第一TMGI关联的MBS会话信息，所述MBS会话信息包括UP隧道信息，所述UP隧道信息包括以下至少一项：TMGI，tunnel标识，IP多播地址；
    将所述UP隧道信息发送给终端。
  6. 根据权利要求1所述的多播广播业务传输方法，其中，为同一多播广播业务MBS在不同核心网下采用相同的TMGI分配规则包括：
    与接入网网元关联的其他核心网对应网元交互TMGI分配情况；
    若其他核心网的对应网元已进行TMGI分配，其中一核心网为一MBS分配的第二TMGI与自身为该MBS分配的第三TMGI没有冲突，为所述MBS配置所述第三TMGI；分配的第二TMGI与自身为该MBS分配的第三TMGI冲突，与其他核心网网元协商进行TMGI重分配；
    若其他核心网网元未进行TMGI分配，直接为MBS分配第三TMGI。
  7. 根据权利要求6所述的多播广播业务传输方法，其中，直接为MBS分配第三TMGI之后，所述方法还包括：
    在多个不同核心网的对应网元间广播为MBS分配的TMGI、IP地址及对应的小区标识。
  8. 根据权利要求1所述的多播广播业务传输方法，其中，若判断存在接入网网元共享情况，所述方法还包括：
    保存并广播第一用户面信息，所述第一用户面信息为所述接入网网元与所述核心网网元间建立的MBS会话的用户面信息及关联的控制面信息。
  9. 根据权利要求1所述的多播广播业务传输方法，其中，若判断存在接入网网元共享情况，所述方法还包括：
    接收第一用户面信息，所述第一用户面信息为所述接入网网元与其他核心网网元间建立的MBS会话的用户面信息及关联的控制面信息；
    通知AF停止对所述MBS发送多播或广播数据包，或，自行丢弃所述MBS的数据包。
  10. 根据权利要求1-9中任一项所述的多播广播业务传输方法，其中，所述核心网网元为会话管理功能SMF或多播广播服务功能MBSF。
  11. 根据权利要求10所述的多播广播业务传输方法，其中，所述核心网网元为MBSF，判断是否存在无线接入网共享情况包括：
    基于MBSF是否为共享网元判断是否存在无线接入网共享情况；或
    基于SMF提供的信息判断是否存在无线接入网共享情况。
  12. 根据权利要求10所述的多播广播业务传输方法，其中，所述核心网网元为SMF，判断存在接入网网元共享情况之前，所述方法还包括：
    接收接入和移动性功能AMF发送的第二指示信息，指示所述接入网网元为共享接入网网元并且支持MBS；
    基于所述第二指示信息选择已与其他核心网网元建立接口的MBSF，或，支持共享的MBSF。
  13. 一种多播广播业务传输方法，由接入网网元执行，包括：
    接收核心网网元发送的TMGI分配信息，所述TMGI分配信息包括TMGI与多播广播业务MBS之间的映射关系；
    根据所述TMGI分配信息判断是否存在同一MBS从不同核心网网元发送的情况，若存在，选择其中一个或多个MBS会话的第一用户面隧道作为基本传输通道；
    向应用功能实体AF发送通知信息，通知AF停止对除所述第一用户面隧道之外的第二用户面隧道所在核心网发送多播或广播数据包，或，丢弃第二用户面隧道的多播或广播数据包。
  14. 根据权利要求13所述的多播广播业务传输方法，其中，接收核心网网元发送的TMGI分配信息之前，所述方法还包括：
    向接入和移动性功能AMF发送第三指示信息，指示所述接入网网元为共享接入网网元并且支持MBS。
  15. 根据权利要求13所述的多播广播业务传输方法，其中，所述方法还包括：
    向终端发送重配消息，将终端的用户面UP通道重配为选择的UP通道；或
    保留多个UP通道，动态选择其中一个或多个UP通道作为该接入网网元下终端接收MBS的UP通道，并将所述UP通道对应的UP信息发送给所述终端。
  16. 根据权利要求15所述的多播广播业务传输方法，其中，选择UP通 道依据的信息包括以下至少一项：
    核心网网元提供的通道tunnel的优先级信息；
    tunnel建立的时间；
    是否为特定业务专用tunnel；
    tunnel的传输速率；
    不同核心网网元对MBS的优先级。
  17. 根据权利要求13所述的多播广播业务传输方法，其中，所述核心网网元为会话管理功能SMF或MBSF。
  18. 一种多播广播业务传输装置，应用于核心网网元，包括收发机和处理器，
    所述处理器用于若判断存在接入网网元共享情况，与其他核心网网元交互临时移动群组标识TMGI分配情况，为同一多播广播业务MBS在不同核心网下采用相同的TMGI分配规则；
    所述收发机用于将TMGI分配信息发送给接入网网元，所述TMGI分配信息包括TMGI与MBS之间的映射关系。
  19. 一种多播广播业务传输装置，应用于接入网网元，包括收发机和处理器，
    所述收发机用于接收核心网网元发送的TMGI分配信息，所述TMGI分配信息包括TMGI与多播广播业务MBS之间的映射关系；
    所述处理器用于根据所述TMGI分配信息判断是否存在同一MBS从不同核心网网元发送的情况，若存在，选择其中一个或多个MBS会话的第一用户面隧道作为基本传输通道；
    所述收发机还用于向应用功能实体AF发送通知信息，通知AF停止对除所述第一用户面隧道之外的第二用户面隧道所在核心网发送多播或广播数据包，或，丢弃第二用户面隧道的多播或广播数据包。
  20. 一种多播广播业务传输装置，包括存储器、处理器及存储在所述存储器上并可在所述处理器上运行的计算机程序；所述处理器执行所述程序时实现如权利要求1-17中任一项所述的多播广播业务传输方法。
  21. 一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现如权利要求1-17中任一项所述的多播广播业务传输方法中的步骤。
PCT/CN2022/131739 2021-11-12 2022-11-14 多播广播业务传输方法及装置 Ceased WO2023083351A1 (zh)

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