WO2020078342A1 - 发送组播数据的方法和装置 - Google Patents

发送组播数据的方法和装置 Download PDF

Info

Publication number
WO2020078342A1
WO2020078342A1 PCT/CN2019/111154 CN2019111154W WO2020078342A1 WO 2020078342 A1 WO2020078342 A1 WO 2020078342A1 CN 2019111154 W CN2019111154 W CN 2019111154W WO 2020078342 A1 WO2020078342 A1 WO 2020078342A1
Authority
WO
WIPO (PCT)
Prior art keywords
network element
information
data
user plane
core network
Prior art date
Application number
PCT/CN2019/111154
Other languages
English (en)
French (fr)
Inventor
诸华林
靳维生
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP19872948.5A priority Critical patent/EP3840426B1/en
Publication of WO2020078342A1 publication Critical patent/WO2020078342A1/zh
Priority to US17/223,866 priority patent/US20210227608A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • 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
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers

Definitions

  • the present application relates to the field of communications, and in particular to a method and device for sending multicast data.
  • Multicast communication is a communication technology that can save bandwidth.
  • a multicast source device transmits data to multiple target devices located in a multicast group, only one copy of the data is transmitted, and the transmission device (such as a router) near the target device receives it. After the data is reached, the data is copied and distributed to multiple terminals respectively. Since only one piece of data is transmitted between the multicast source device and the transmission device, multicast communication can save transmission bandwidth.
  • the fixed network is usually used as a communication network between a multicast source device and a transmission device
  • the mobile network is usually used as a communication network between a transmission device and a terminal.
  • Multicast data is still transmitted in a single copy in the fixed network, and is transmitted to the terminal through the communication device (ie, connection device) at the connection between the mobile network and the fixed network.
  • the connection device is, for example, a user plane function (UPF) .
  • the difference between the data transmission in the mobile network and the data transmission in the fixed network is that the transmission equipment in the fixed network is usually sent hop by hop according to the destination address of the data. After the data reaches the transmission equipment closest to the terminal, the transmission equipment It is directly forwarded to the terminal; the transmission mechanism of the mobile network becomes more complicated due to the terminal's mobility. After the data reaches the connecting device, it needs to pass through a data connection carried on multiple intermediate devices to reach the terminal.
  • the data connection is the terminal Dedicated data channel, therefore, a piece of multicast data needs to be copied into multiple copies at the connecting device, and sent to multiple terminals through the data connection of each terminal, so that the intermediate equipment of the mobile network transmits a large amount of repeated multicast data, It causes a waste of transmission resources of the mobile network.
  • the present application provides a method and device for sending multicast data, which can reduce redundant multicast data transmitted in the mobile network and avoid waste of transmission resources of the mobile network.
  • a method for sending multicast data including: a core network user plane network element establishing multiple data connections with a terminal; a core network user plane network element determining a first data connection, the multiple data connections including the first A data connection; the core network user plane network element receives the multicast data sent to the terminal; the core network user plane network element sends the multicast data to the access network network element through the first data connection.
  • the core network user plane network element establishes multiple data connections with multiple terminals through one access network device.
  • the first data connection is a partial data connection among multiple data connections.
  • the core network user plane network element sends multicast data to the terminal through the partial data connection among multiple data connections, reducing redundant multicast data transmitted in the core network. , Thereby avoiding the waste of transmission resources.
  • the determining of the first data connection by the core network user plane network element includes: the core network user plane network element determining at least one data created by the access network network element according to the identification information of the access network network element Connection; the core network user plane network element determines the first data connection from at least one data connection.
  • the core network user plane network element may determine at least one data connection established through one access network element according to the identification information of the access network element, and select a first data connection from the at least one data connection to transmit multicast data, No other network element (eg, core network control plane network element) is required to select the first data connection, thereby reducing the burden on other network elements.
  • No other network element eg, core network control plane network element
  • the core network user plane network element determining the first data connection from at least one data connection includes: the core network user plane network element determining the first request to receive multicast data from the at least one data connection Is the first data connection.
  • the method further includes: when the first data connection is deleted or deactivated, the core network user plane network element re-determines the data connection for transmitting multicast data from the at least one data connection .
  • the above solution can avoid the interruption of the transmission of multicast data and improve the reliability of the core network.
  • the method further includes: the core network user plane network The element receives the first control plane information from the core network control plane network element.
  • the first control plane information includes at least one of the identification information of the access network network element and the following terminal information: the terminal's identification ID, the terminal's Internet protocol IP address, The ID of multiple data connections and the TEID of the tunnel endpoint identification of multiple data connections.
  • the method further includes: the core network user plane network element sends to the core network control plane network element
  • the first request information is used to request to obtain the identification information of the data connection associated with the access network element, or the first request information is used to request the acquisition of the access network element associated with multiple data connections Identification information.
  • the method before the core network user plane network element receives the first control plane information from the core network control plane network element, the method further includes: the core network user plane network element sends to the core network control plane network element The first user plane information.
  • the first user plane information is used to request reception of multicast data.
  • the method further includes: the core network user plane network The element receives second user plane information from the access network element through multiple data connections, and the second user plane information includes identification information of the access network element.
  • the core network user plane network element determining the first data connection includes: the core network user plane network element receives second control plane information from the core network control plane network element, and the second control plane information is used to Indicates the first data connection.
  • the above solution does not require the core network user plane network element to select the first data connection, which reduces the burden on the core network user plane network element.
  • the method before the core network user plane network element receives the second control plane information from the core network control plane network element, the method further includes: the core network user plane network element sends to the core network control plane network element
  • the second request information is used to request to obtain the identification information of the data connection transmitting the multicast data.
  • the method before the core network user plane network element receives the second control plane information from the core network control plane network element, the method further includes: the core network user plane network element sends to the core network control plane network element The first user plane information.
  • the first user plane information is used to request reception of multicast data.
  • the second control plane information includes at least one of indication information and the following terminal information: terminal ID, terminal IP address, multiple data connection IDs, multiple data connection TEIDs, and indications Information, wherein the instruction information is used to indicate whether to transmit the multicast data through the data connection transmitting the above terminal information.
  • the method further includes: the core network user plane network element receives first user plane information, and the first user plane information is used to request to receive multicast data; the core network user plane network element is based on the first User plane information counts the amount of multicast data.
  • the core network user plane network element Although the core network user plane network element only sends multicast data through some of the multiple data connections, the core network user plane network element can still determine the amount of multicast data received by each terminal based on the above solution.
  • the charging network element of the system can be charged according to the data volume counted by the core network user plane network element, so that the redundant multicast data transmitted in the core network can be reduced while avoiding the impact on the charging function of the communication system.
  • the present application provides a communication method, including: a core network control plane network element determines a plurality of data connections, the multiple data connections being used by a core network user plane network element and a terminal to transmit multicast data Connection; the core network control plane network element determines at least one data connection from multiple data connections according to the identification information of the access network network element, the at least one data connection corresponds to the same access network network element; the core network control plane network element direction
  • the core network user plane network element sends second control plane information, where the second control plane information is used to indicate the first data connection among the at least one data connection.
  • the core network control plane network element instructs the core network user plane network element (for example, UPF) to send multicast data to the terminal through some of the multiple data connections according to the above scheme, reducing redundant multicast data transmitted in the core network , Thereby avoiding the waste of transmission resources.
  • the core network user plane network element for example, UPF
  • the core network control plane network element sends second control plane information to the core network user plane network element, including: the core network control plane network element receives second request information from the core network user plane, and the second The request information is used to request to obtain the identification information of the data connection transmitting the multicast data; the core network control plane network element sends the second control plane information to the core network user plane network element according to the second request information.
  • the core network control plane network element sends second control plane information to the core network user plane network element, including: the core network control plane network element receives the first user plane information from the core network user plane network element The first user plane information is used to request to receive multicast data; the core network control plane network element sends the second control plane information to the core network user plane network element according to the first user plane information.
  • the core network control plane network element determines at least one data connection from multiple data connections according to the identification information of the access network network element, including: the core network control plane network element accesses the management network element Receive at least one of the identification information of the access network element and the following terminal information: terminal ID, terminal IP address, multiple data connection ID, multiple data connection TEID; core network control plane network element according to access At least one of the identification information of the network element and the terminal information determines at least one data connection.
  • the method further includes: the core network control plane network element from The access management network element or the core network user plane network element receives second user plane information, and the second user plane information includes identification information of the access network network element.
  • the method further includes: when the first data connection is deleted or deactivated, the core network control plane network element re-determines the data connection for transmitting multicast data from the at least one data connection .
  • the above solution can avoid the interruption of the transmission of multicast data and improve the reliability of the core network.
  • the method further includes: the core network control plane network element receives first user plane information, and the first user plane information is used to request reception of multicast data; the core network control plane network element according to the first The user plane information counts the amount of multicast data sent to each terminal.
  • the core network control plane network element can determine the amount of multicast data received by each terminal.
  • the communication system The charging network element can be charged according to the data volume counted by the core network control plane network element, so that the redundant multicast data transmitted in the core network can be reduced while avoiding the impact on the charging function of the communication system.
  • the present application also provides another communication method.
  • the method includes: a core network control plane network element determines a first data connection, and the first data connection belongs to a plurality of core network user plane network elements and terminals established Data connection, the first data connection is used to send the multicast data of the terminal to an access network device; the core network control plane network element sends the first data connection to the core network user plane network element information.
  • the present application provides an apparatus for sending multicast data, which can implement the functions corresponding to the steps in the method related to the first aspect described above.
  • the functions can be implemented by hardware or can be executed by hardware
  • the corresponding software implementation The hardware or software includes one or more units or modules corresponding to the above functions.
  • the device includes a processor, and the processor is configured to support the device to implement the corresponding function in the method according to the first aspect.
  • the device may also include a memory for coupling with the processor, which stores necessary program instructions and data of the device.
  • the device also includes a communication interface for supporting communication between the device and other network elements.
  • the present application provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed by a processing unit of a core network device, causing the core network device to perform the first aspect Described method.
  • the present application provides a computer-readable storage medium in which computer program code is stored.
  • the computer program code When the computer program code is executed by a processing unit or a processor, the computer program code can be implemented as described in the first aspect method.
  • the present application provides a communication device that can implement the functions corresponding to the various steps in the method related to the second aspect above, and the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software .
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the device includes a processor, and the processor is configured to support the device to implement the corresponding function in the method according to the second aspect.
  • the device may also include a memory for coupling with the processor, which stores necessary program instructions and data of the device.
  • the device also includes a communication interface for supporting communication between the device and other network elements.
  • the foregoing device includes a processing unit and a sending unit,
  • the processing unit is used to: determine a plurality of data connections, the plurality of data connections is a connection established by the core network user plane network element and the terminal for transmitting multicast data; according to the identification information of the access network element Determining at least one data connection among the plurality of data connections, the at least one data connection corresponding to the same access network element;
  • the sending unit is configured to send second control plane information to the core network user plane network element, where the second control plane information is used to indicate a first data connection among the at least one data connection.
  • the device further includes a receiving unit,
  • the receiving unit is configured to: receive second request information from the user plane of the core network, where the second request information is used to request to obtain identification information of a data connection transmitting the multicast data;
  • the sending unit is specifically configured to send the second control plane information to the core network user plane network element according to the second request information.
  • the device further includes a receiving unit,
  • the receiving unit is configured to: receive first user plane information from the core network user plane network element, and the first user plane information is used to request reception of the multicast data;
  • the sending unit is specifically configured to send the second control plane information to the core network user plane network element according to the first user plane information.
  • the device further includes a receiving unit,
  • the receiving unit is configured to receive at least one of the identification information of the access network element and the following terminal information from the access management network element:
  • the identification ID of the terminal the Internet protocol IP address of the terminal, the IDs of the multiple data connections, and the tunnel endpoint identification TEID of the multiple data connections;
  • the processing unit is specifically configured to determine the at least one data connection according to at least one of the identification information of the access network element and the terminal information.
  • the device further includes a receiving unit, configured to:
  • Second user plane information from an access management network element or the core network user plane network element, where the second user plane information includes identification information of the access network network element.
  • processing unit is further used to:
  • the data connection used to transmit the multicast data is re-determined from the at least one data connection.
  • the device further includes a receiving unit,
  • the receiving unit is configured to: receive first user plane information, and the first user plane information is used to request reception of the multicast data;
  • the processing unit is further configured to: count the data volume of the multicast data according to the first user plane information.
  • the present application provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed by a processing unit of a core network device, causing the core network device to perform the second aspect Described method.
  • the present application provides a computer-readable storage medium in which computer program code is stored.
  • the computer program code When the computer program code is executed by a processing unit or processor, the computer program code can be implemented as described in the second aspect method.
  • the present application provides another communication device that can implement the functions corresponding to the steps in the method related to the third aspect above, and the functions can be implemented by hardware, or the corresponding software can be executed by hardware achieve.
  • the hardware or software includes one or more units or modules corresponding to the above functions.
  • the device includes a processor, and the processor is configured to support the device to implement the corresponding function in the method according to the third aspect.
  • the device may also include a memory for coupling with the processor, which stores necessary program instructions and data of the device.
  • the device also includes a communication interface for supporting communication between the device and other network elements.
  • the present application provides a computer program product, the computer program product comprising: computer program code, which causes the core network device to perform the third aspect when the computer program code is executed by a processing unit of the core network device The method.
  • the present application provides a computer-readable storage medium in which computer program code is stored.
  • the computer program code When the computer program code is executed by a processing unit or processor, the computer program code can be implemented as described in the third aspect Methods.
  • FIG. 1 is a schematic diagram of a communication system suitable for this application.
  • FIG. 2 is a schematic diagram of a method for sending multicast data provided by this application
  • FIG. 3 is a schematic diagram of a method for establishing a session provided by this application.
  • FIG. 4 is a schematic diagram of a method for obtaining identification information of an access network provided by this application.
  • FIG. 5 is a schematic diagram of another method for obtaining identification information of an access network provided by this application.
  • FIG. 6 is a schematic diagram of yet another method for obtaining identification information of an access network provided by this application.
  • FIG. 7 is a schematic diagram of yet another method for obtaining identification information of an access network provided by this application.
  • FIG. 8 is a schematic diagram of a method for updating a session provided by this application.
  • FIG. 9 is a schematic diagram of another method for sending multicast data provided by this application.
  • FIG. 10 is a schematic diagram of an apparatus for sending multicast data provided by this application.
  • FIG. 11 is a schematic diagram of another apparatus for sending multicast data provided by this application.
  • FIG. 12 is a schematic diagram of another apparatus for sending multicast data provided by this application.
  • FIG. 13 is a schematic diagram of yet another apparatus for sending multicast data provided by this application.
  • Terminal It can include various handheld devices with wireless communication function, in-vehicle devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of terminals, mobile stations , MS), user equipment (UE), soft terminals, home gateways, set-top boxes, etc.
  • (Wireless) access network ((radio) access network ((R) AN) network element: used to provide network access functions for authorized terminals in a specific area, and can use different quality transmissions according to the terminal level and business requirements, etc. Channel to communicate.
  • (R) AN NE to manage access network resources, provide access to Terminal Services, and then complete the transfer of data between the terminal and the core network
  • (R) AN NE may be a third generation partnership project (3 rd
  • the base station defined by the generation partnership project (3GPP) can also be a non-3GPP (non-3GPP) access network or an access network with a fixed-mobile convergence architecture, such as an access gateway (AGF) or fixed-mobile interworking function (fixed mobile interworking function, FMIF). Any access network that accesses the core network of the mobile network belongs to the AN of this application.
  • AMF access gateway
  • FMIF fixed-mobile interworking function
  • User plane network element used for packet routing and forwarding and quality of service (QoS) processing of user plane data, etc.
  • the user plane network element In a fifth-generation (5 th -generation, 5G) communication system, the user plane network element is called UPF. In the future communication system, the user plane network element may still be called UPF, or may have another name, which is not limited in this application.
  • the user plane network element may also be a packet data network gateway (PDN-GW).
  • PDN-GW packet data network gateway
  • Data network element used to provide a network for transmitting data, for example, to forward multicast data received from a fixed network to a terminal.
  • the data network element In a 5G communication system, the data network element is called a data network (DN). In the future communication system, the data network network element may still be called DN, or may have another name, which is not limited in this application.
  • DN data network
  • Access management network element mainly used for mobility management and access management, etc., and can be used to implement other functions besides session management in mobility management entity (mobility management entity, MME) functions, for example, lawful interception And functions such as access authorization / authentication.
  • mobility management entity mobility management entity, MME
  • functions for example, lawful interception And functions such as access authorization / authentication.
  • the access management network element is called an access management function (access and mobility management function, AMF).
  • AMF access management function
  • the access management network element may still be called AMF, or may have another name, which is not limited in this application.
  • Session management network element mainly used for session management, terminal equipment Internet protocol (IP) address allocation and management, selection of endpoints that can manage user plane functions, policy control and charging function interfaces, and downstream data notification, etc. .
  • IP Internet protocol
  • the session management network element is called a session management function (session management function, SMF).
  • SMF session management function
  • the session management network element may still be called SMF, or may have another name, which is not limited in this application.
  • network element or function may be a network element in a hardware device, or may be a software function running on dedicated hardware, or a virtualized function instantiated on a platform (for example, a cloud platform).
  • control plane control plane
  • AMF and SMF may both be called control plane network elements.
  • control plane information the information generated by the control plane network element may be referred to as control plane information.
  • FIG. 1 is a schematic diagram of a communication system suitable for this application.
  • the communication system includes fixed and mobile networks.
  • An optional definition of a fixed network is a network that transmits data through fixed media such as metal wires or optical fibers.
  • fixed media such as metal wires or optical fibers.
  • traditional Ethernet that communicates through cables
  • flexible Ethernet FlexE
  • An optional definition of a mobile network is: a network that transmits data through electromagnetic waves.
  • 5G communication system private network
  • long term evolution (LTE) communication system Wi-Fi communication system
  • Wi-Fi wireless fidelity
  • Bluetooth Bluetooth communication system
  • the mobile network is a 5G communication system
  • DN serves as a connection device between the fixed network and the mobile network, receives data from the fixed network, and sends the data to the UPF.
  • the UPF establishes a data connection with each UE through the AN and sends data to each UE through the data connection.
  • the data connection is, for example, a protocol data unit (PDU) session.
  • PDU protocol data unit
  • UE1 when UE1 needs to receive multicast data, UE1 can send an Internet Group Management Protocol (IGMP) join message (IGMP) join message to AN1.
  • IGMP Internet Group Management Protocol
  • the IGMP join message is simply referred to as an IGMP message .
  • the IGMP message carries the identifier of the multicast group.
  • the identifier of the multicast group is, for example, a multicast address.
  • AN1 forwards the IGMP message to UPF.
  • UPF can determine that UE1 has joined the multicast group corresponding to the multicast address.
  • the UPF may send the multicast message corresponding to the multicast address to UE1 through the data connection with UE1.
  • AMF and SMF are used to maintain the data connection between AN1 and UPF.
  • the network between AN and DN can be called the core network.
  • the above communication system is only an example, and the communication system applicable to the present application is not limited to this.
  • the method for sending multicast data provided by the present application will be described below based on the communication system shown in FIG. 1 as an example.
  • FIG. 2 shows a schematic diagram of a method for sending multicast data provided by this application.
  • the method 200 includes:
  • the UPF establishes multiple data connections with the terminal.
  • the terminal may be one UE or multiple UEs.
  • the UPF can establish multiple data connections with the UE through two or more ANs; when the above terminal is multiple UEs, the UPF can establish with the multiple UEs through one or multiple ANs Multiple data connections.
  • the specific method for establishing a data connection between the UPF and the terminal can refer to the method for establishing a data connection in the prior art.
  • the UPF determines a first data connection, and the foregoing multiple data connections include the first data connection.
  • the first data connection is one or more of the above multiple data connections, and the number of the first data connection is smaller than the number of multiple data connections in S210.
  • UPF establishes a PDU session with UE1 and UE2 respectively
  • the first data connection may be a PDU session between UPF and UE1, or a PDU between UPF and UE2 Conversation.
  • UPF establishes a PDU session with UE1, UE2, and UE3, respectively.
  • the first data connection may be a PDU session between UPF and UE1, and between UPF and UE3.
  • the PDU session may also be a PDU session between UPF and UE2 and a PDU session between UPF and UE3.
  • UPF establishes two flows with UE1 and UE2, and the first data connection may be two flows between UPF and UE1, or UPF and UE1. Two streams between UE2.
  • the UPF receives the multicast data sent to the terminal.
  • UPF can determine the multicast data sent to the terminal based on the IGMP message received from the terminal. If the multicast address of the multicast data received by UPF from the DN is the same as the multicast address carried in the IGMP message, UPF determines the multicast data Multicast data sent to the terminal.
  • the UPF sends the multicast data to the AN through the first data connection.
  • the UPF needs to send multicast data to the AN so that the AN can forward the multicast data to the terminal. For example, after receiving multicast data through the PDU session of UE1, AN1 may copy a copy of the multicast data and send the copied multicast data to UE2.
  • the UPF sends multicast data to the terminal through some of the multiple data connections, reducing redundant multicast data transmitted in the core network, thereby avoiding waste of transmission resources.
  • the execution order of S220 and S230 may be exchanged, that is, the UPF may receive multicast data first, and then determine the first data connection.
  • the present application does not limit the specific manner in which the UPF determines the first data connection.
  • the UPF may determine the first data connection from multiple data connections based on information acquired from other network elements (ie, actively select a scheme), or may determine the first data connection from multiple data connections according to instructions from other network elements (Ie, passively accept the plan).
  • the method for the UPF to determine the first data connection will be described from these two aspects respectively.
  • S220 includes:
  • UPF determines at least one data connection established through the AN according to the identification information of the AN;
  • the UPF determines the first data connection from at least one data connection.
  • the UPF groups at least one data connection corresponding to the identification information of the same AN into a group, and selects one or a few data connections from the at least one data connection as the first data connection. Since the AN can copy the multicast data and send the multicast data to the terminals within the coverage of the AN, the above solution can meet the needs of multicast transmission, and at the same time reduce the redundant multicast data transmitted in the core network.
  • the UPF may determine the first data connection from at least one data connection according to the following rules:
  • UPF establishes a PDU session with UE1 and UE2, that is, UPF establishes session 1 with UE1, and UPF establishes session 2 with UE2.
  • the UPF may randomly select one session from session 1 and session 2 as the first data connection.
  • the UPF may also determine the first data connection according to a preset policy, for example, select a session with a smaller identification value (that is, session 1) as the first data connection.
  • the UPF can also select a session with better QoS from session 1 and session 2 as the first data connection.
  • the UPF may also select the first connection requesting to receive multicast data as the first data connection. For example, the UPF first receives the IGMP message containing the multicast address A through session 2 and then receives the multicast connection A through session 1 IGMP message, UPF can use session 2 as the first data connection, send multicast data corresponding to multicast address A to AN1 through session 2, instead of sending multicast data to UE1 through session 1, AN1 will pass the session 2 The received multicast data is copied and forwarded to UE1.
  • the identification information of the AN may be an equipment identifier (ID) of the AN, an equipment IP address of the AN, or other information used to identify the AN.
  • ID Equipment identifier
  • AN1 corresponds to three virtual local area networks (Virtual Local Area Networks, VLANs), namely VLAN1, VLAN2, and VLAN3, and AN2 corresponds to two VLANs, VLAN4 and VLAN5, respectively.
  • VLANs Virtual Local Area Networks
  • VLAN1 Virtual Local Area Networks
  • AN2 corresponds to two VLANs, VLAN4 and VLAN5, respectively.
  • This application does not limit the method for UPF to obtain the identification information of AN.
  • the following methods for obtaining the identification information of the AN by the UPF are only examples.
  • Method 1 UPF obtains the identification information of AN through the control plane information.
  • the method 200 further includes:
  • the UPF receives the first control plane information from the SMF, and the first control plane information includes at least one of the identification information of the AN and the following terminal information:
  • the ID of the terminal The ID of the terminal, the IP address of the terminal, the IDs of the multiple data connections described in S210, and the tunnel endpoint ID (TEID) of the multiple data connections.
  • the SMF is a data connection manager, and it stores the correspondence between AN and each data connection.
  • the SMF may send the identification information of the AN and the above-mentioned terminal information to the UPF, and indicate the association relationship between the AN and the data connection to the UPF.
  • the association relationship between the AN and the data connection refers to the data connection established by the terminal through the AN.
  • the first control plane information includes the identification information of the AN as AN1, and the terminal IDs as UE1 and UE2, where the data connection of UE1 is PDU session 1 and the data connection of UE2 is PDU session 2.
  • the UPF determines that the data connection corresponding to AN1 is PDU session 1 and PDU session 2.
  • the UPF determines that the AN corresponding to PDU session 1 and PDU session 2 is AN1. That is, the UPF determines the association relationship between AN1 and PDU session 1 and PDU session 2 according to the first control plane information.
  • terminal information is only an example, and any other information that can identify the data connection of the terminal may be referred to as terminal information.
  • the present application does not limit the specific form of the first control plane information.
  • the first control plane information may be carried in a message establishing a PDU session, or may be sent separately after the PDU session is established.
  • FIG. 3 shows a schematic diagram of a method for sending first control plane information provided by this application.
  • the method includes:
  • the UE sends a PDU session establishment request (PDU session establishment request) to the AMF, requesting to establish a PDU session.
  • PDU session establishment request PDU session establishment request
  • the AMF sends a create session management context request (create SM context request) to the SMF, which is carried in the request.
  • create SM context request create SM context request
  • AMF sends a create session management context response (create SM context response) to SMF.
  • the SMF sends a session establishment / modification request (session establishment / modification request) to the UPF.
  • the UPF sends a session establishment / modification response (session establishment / modification response) to the SMF.
  • SMF determines the correspondence between AN and PDU session through "Create Session Management Context Request", and then, in S340, a "session establishment / modification request" carrying terminal information and AN's identification information can be sent to UPF in order to The UPF determines the association relationship between the AN and the PDU session, where “session establishment / modification request” is the first control plane information.
  • the SMF may actively send the first control plane information to the UPF, or may send the first control plane information to the UPF according to the request information or the user plane information sent by the UPF.
  • the method 200 before the UPF receives the first control plane information from the SMF, the method 200 further includes:
  • the UPF sends first request information to the SMF.
  • the first request information is used to request identification information of a data connection associated with the AN, or the first request information is used to request identification information of an AN associated with multiple data connections.
  • the UPF may send the first request information after receiving the multicast data, and the UPF may also send the first request information after receiving the IGMP message.
  • the identification information of the data connection is, for example, the terminal information mentioned above.
  • UPF has established PDU sessions with UE1, UE2, and UE3, that is, session 1, session 2, and session 3, after receiving IGMP messages through session 1, session 2, and session 3, UPF can request The identification information of the AN associated with session 1, session 2 and session 3 is obtained, thereby determining the association relationship between the AN and the session.
  • the UPF may request to obtain the PDU session associated with each of AN1 and AN2, thereby determining the association relationship between the AN and the session.
  • the UPF may not send the first request information, but determine the association relationship between the AN and the session by forwarding specific user plane information to the SMF. That is, before the UPF receives the first control plane information from the SMF, the method 200 further includes:
  • the UPF sends the first user plane information to the SMF, and the first user plane information is used to request to receive the multicast data.
  • the first user plane information is, for example, an IGMP message.
  • the UPF After receiving the IGMP message, the UPF forwards the IGMP message to the SMF, which triggers the SMF to send the first control plane information (ie, terminal information and AN identification information) to the UPF.
  • the first control plane information ie, terminal information and AN identification information
  • UPF has established PDU sessions with UE1, UE2, and UE3, that is, session 1, session 2 and session 3, after receiving the IGMP messages through session 1, session 2 and session 3, UPF sends the IGMP messages The message is forwarded to the SMF, and the SMF determines that the UPF needs to forward the multicast data according to the IGMP message, and sends the first control plane information (ie, terminal information and AN identification information) to the UPF.
  • the first control plane information ie, terminal information and AN identification information
  • FIG. 5 only shows that the SMF receives the first user plane information from the UPF.
  • the SMF may also receive the first user plane information through the AMF, and according to the received from the AMF The first user plane information sends the first control plane information to the UPF. This application does not limit how the SMF obtains the first user plane information.
  • the first control plane information includes terminal information and AN identification information.
  • the first control plane information may include only the AN identification information.
  • the UPF is determined according to any user plane information received from the AN Association relationship between AN and data connection.
  • the UPF connected to UE1, UE2, and UE3 and the UPF receiving multicast data are the same UPF.
  • the UPF first obtains the identification information of AN1 through the "session establishment / modification request" in S340. Subsequently, the When UPF receives the second user plane information from AN1 through session 1, UPF can determine the association relationship between session 1 and AN1, where the second user plane information is any user plane information, and the second user plane information can be an IGMP message, Other messages are also possible.
  • the above method is only applicable to the scenario where the UPF receiving multicast data is directly connected to the AN. If the UPF receiving the multicast data is not directly connected to the AN, the second user plane information needs to include the identification information of the AN.
  • the above describes the method by which the UPF determines the association relationship between the AN and the session through the control plane information.
  • the UPF may also determine the association relationship between the AN and the session using only the user plane information.
  • Method 2 UPF obtains the identification information of AN through user plane information.
  • the UPF connected to UE1 and UE2 is UPF1
  • the UPF connected to UE3 is UPF2
  • the UPF receiving multicast data is UPF0
  • UPF0 determines at least one data connection established through the AN according to the identification information of the AN Previously, the method 200 also included:
  • UPF0 receives the second user plane information from the AN through the multiple data connections described in S210, and the second user plane information includes the identification information of the AN.
  • UPF0 no longer obtains the identification information of the AN from the “session establishment / modification request”, but obtains the identification information of the AN from the second user plane information.
  • UPF0 receives IGMP message 1 through session 1, IGMP message 1 carries the identification information of AN1; UPF0 receives IGMP message 2 through session 2, and IGMP message 2 carries the identification information of AN1; UPF0 receives IGMP message 3 through session 3, IGMP message 3 carries the identification information of AN2; then UPF0 may determine that at least one data connection established through AN1 is session 1 and session 2, and determine that at least one data connection established through AN2 is session 3.
  • UPF0 can send multicast data to AN1 through Session 1 or Session 2, and send multicast data to AN2 through Session 3.
  • Method 2 is applicable not only to the non-directly connected scenario shown in FIG. 7 but also to the directly connected scenario shown in FIG. 6.
  • S220 includes:
  • the UPF receives second control plane information from the SMF, and the second control plane information is used to indicate the first data connection.
  • the second control plane information includes at least one of instruction information and the following terminal information:
  • the ID of the terminal The ID of the terminal, the IP address of the terminal, the IDs of the multiple data connections described in S210, the TEIDs of the multiple data connections and the indication information, wherein the indication information is used to indicate whether to transmit the group through the data connection transmitting the above terminal information ⁇ ⁇ Broadcast data.
  • the second control plane information may be the session establishment / modification request in FIG. 3, or may be the control plane information after the session establishment is completed.
  • UPF establishes session 1 with UE1, establishes session 2 with UE2, and establishes session 3 with UE3.
  • SMF can send a second instruction indicating session 1 and session 3 to UPF through a session establishment / modification request
  • the control plane information may also send the second control plane information indicating session 2 and session 3 to the UPF through the session establishment / modification request.
  • the UPF After receiving the second control plane information, the UPF sends the multicast data through the session indicated by the second control plane information without having to select the session by itself, thereby reducing the burden on the UPF.
  • the UPF may send request information or user plane information to the SMF before receiving the second control plane information.
  • the method 200 before the UPF receives the second control plane information from the SMF, the method 200 further includes:
  • the UPF sends second request information to the SMF, and the second request information is used to request to obtain identification information of the data connection transmitting the multicast data.
  • the UPF may send the second request information after receiving the multicast data, or may send the second request information after receiving the IGMP message.
  • the identification information of the data connection is, for example, the terminal information mentioned above.
  • UPF has established PDU sessions with UE1, UE2, and UE3, that is, session 1, session 2 and session 3, UPF receives IGMP messages (carrying multicast) through session 1, session 2 and session 3 Address), you can request to obtain the identification information of the session corresponding to the multicast address.
  • IGMP messages carrier multicast
  • the UPF may request to obtain the identification information of the session corresponding to the multicast address.
  • the SMF sends the second control plane information to the UPF according to the second request information.
  • the method 200 before the UPF receives the second control plane information from the SMF, the method 200 further includes:
  • the UPF sends first user plane information to the SMF, and the first user plane information is used to request reception of multicast data.
  • the first user plane information is, for example, an IGMP message.
  • the UPF After receiving the IGMP message, the UPF forwards the IGMP message to the SMF, which triggers the SMF to send the second control plane information (ie, terminal information) to the UPF.
  • the second control plane information ie, terminal information
  • UPF has established PDU sessions with UE1, UE2, and UE3, that is, session 1, session 2, and session 3, after UPF receives IGMP messages through session 1, session 2, and session 3, it sends IGMP
  • the message is forwarded to the SMF, and the SMF determines that the UPF needs to forward multicast data according to the IGMP message, and sends the first control plane information (ie, terminal information) to the UPF.
  • the first control plane information ie, terminal information
  • the UPF needs to re-determine the data connection used to transmit the multicast data.
  • the process of releasing the data connection is shown in Figure 8.
  • the UE for example, UE1 sends a PDU session release request (PDU session release request) to the AMF, requesting to release session 1.
  • PDU session release request PDU session release request
  • the AMF may send an update session management context (update SM context) message to the SMF, and instruct the SMF to update the context of the session 1 through the update session management context message.
  • update session management context update SM context
  • SMF determines to delete session 1 or deactivate session 1 according to the policy indicated by the policy control function (PCF). If the PCF instructs the session management policy to terminate (session management policy), the SMF determines to delete the session 1.
  • PCF policy control function
  • the SMF sends a session release request (session release request) to the UPF, requesting that session 1 be deleted.
  • the UPF sends a session release response (session release response) to the SMF.
  • SMF can perceive that session 1 will no longer be able to transmit data in S820.
  • SMF can use the above “session release request” to instruct the transmission of multicast data through session 2, that is, send a “session release request” containing the identification of session 2 to UPF .
  • the SMF may also not instruct the UPF to transmit multicast data through session 2, but instruct the UPF to select another session of AN1 to transmit multicast data.
  • the present application also provides a charging method, that is, the method 200 further includes:
  • UPF receives the first user plane information, and the first user plane information is used to request to receive multicast data;
  • the UPF counts the data volume of the multicast data according to the first user plane information.
  • the first user plane information is, for example, an IGMP message.
  • the UPF determines that UE1 has joined the multicast group, and counts the amount of multicast data sent to UE1.
  • UE1 and UE2 are both in the same multicast group, and the amount of multicast data sent by UPF to AN1 through session 2 (the data connection between UE2 and UPF) is 1 trillion (M), then UPF determines that UE1 uses The data volume is 1M, and the UPF determines that the data volume used by UE2 is 1M.
  • UPF does not send multicast data through session 1 (the data connection between UE1 and UPF)
  • the UPF can still determine the amount of multicast data received by UE1 through the above method.
  • the charging network element of the communication system can The data volume counted by UPF is charged, so that the redundant multicast data transmitted in the core network can be reduced while avoiding the impact on the charging function of the communication system.
  • the above mainly describes the method for sending multicast data provided by the present application in detail from the perspective of the core network user plane network element (ie, UPF).
  • the following will describe this from the perspective of the core network control plane network element (for example, SMF).
  • Apply for a method for sending multicast data for example, SMF.
  • the method 900 includes:
  • the SMF determines multiple data connections.
  • the multiple data connections are connections established by the UPF and the terminal for transmitting multicast data.
  • the SMF determines at least one data connection from multiple data connections according to the identification information of the AN, where the at least one data connection corresponds to the same AN.
  • the SMF sends second control plane information to the UPF, where the second control plane information is used to indicate the first data connection of the at least one data connection.
  • the SMF may determine multiple data connections through the process shown in FIG. 3, and determine the first data connection according to a method similar to the method of determining the first data connection by the UPF in method 200.
  • the SMF may determine the first data connection from at least one data connection according to the following rules:
  • the SMF instructs the UPF to send multicast data to the terminal through some of the multiple data connections, reducing redundant multicast data transmitted in the core network, thereby avoiding waste of transmission resources.
  • the SMF may also re-determine the data connection used to transmit multicast data when the first data connection is deleted or deactivated.
  • the SMF may also receive the first user plane information (for example, IGMP message), and count the data volume of the multicast data received by each terminal according to the first user plane information.
  • the communication device includes a hardware structure and / or a software module corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed by hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
  • the present application may divide the functional unit of the communication device according to the above method example, for example, each function may be divided into various functional units, or two or more functions may be integrated into one processing unit.
  • the above integrated unit can be implemented in the form of hardware or software function unit. It should be noted that the division of the units in this application is schematic, and is only a division of logical functions. In actual implementation, there may be another division manner.
  • FIG. 10 shows a possible structural schematic diagram of the apparatus for sending multicast data provided by the present application.
  • the device 1000 includes a processing unit 1001, a receiving unit 1002, and a sending unit 1003.
  • the processing unit 1001 is used to control the device 1000 to execute the steps in the method shown in FIG. 2.
  • the processing unit 1001 may also be used to perform other processes of the techniques described herein.
  • the device 1000 may further include a storage unit for storing the program code and data of the device 1000.
  • the processing unit 1001 is configured to perform: establish multiple data connections with the terminal; determine the first data connection, and the multiple data connections include the first data connection.
  • the processing unit 1001 is also used to control the receiving unit 1002 to perform: receive the multicast data sent to the terminal.
  • the processing unit 1001 is further configured to control the sending unit 1003 to execute: sending the multicast data to the access network element through the first data connection.
  • the processing unit 1001 may be a processor or a controller, such as a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (application-specific integrated circuit) , ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of the present application.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of DSP and microprocessor, and so on.
  • the sending unit 1002 and the receiving unit 1003 are, for example, communication interfaces, and the storage unit may be a memory.
  • the apparatus for sending multicast data involved in the present application may be the apparatus shown in FIG. 11.
  • the device 1100 includes a processor 1101, a communication interface 1102, and a memory 1103 (optional).
  • the processor 1101, the communication interface 1102 and the memory 1103 can communicate with each other through an internal connection channel to transfer control and / or data signals.
  • the device for sending multicast data provided by the present application sends multicast data to the terminal through some of the multiple data connections, reducing redundant multicast data transmitted in the core network, thereby avoiding waste of transmission resources.
  • FIG. 12 shows a possible structural schematic diagram of the apparatus for sending multicast data provided by the present application.
  • the device 1200 includes a processing unit 1201 and a sending unit 1202.
  • the processing unit 1201 is used to control the device 1200 to execute the steps in the method shown in FIG. 9.
  • the processing unit 1201 may also be used to perform other processes of the techniques described herein.
  • the device 1200 may further include a storage unit for storing the program code and data of the device 1200.
  • the processing unit 1201 is configured to perform: determine multiple data connections, which are connections established by the core network user plane network element and the terminal for transmitting multicast data; according to the identification information of the access network element At least one data connection is determined among the multiple data connections, and the at least one data connection corresponds to the same access network element.
  • the processing unit 1201 is further configured to control the sending unit 1202 to execute: sending second control plane information to the core network user plane network element, where the second control plane information is used to indicate the first data connection of the at least one data connection.
  • the processing unit 1201 may be a processor or a controller, for example, it may be a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure of the present application.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of DSP and microprocessor, and so on.
  • the sending unit 1202 is, for example, a communication interface, and the storage unit may be a memory.
  • the apparatus for sending multicast data involved in the present application may be the apparatus shown in FIG. 13.
  • the device 1300 includes: a processor 1301, a communication interface 1302, and a memory 1303 (optional). Among them, the processor 1301, the communication interface 1302, and the memory 1303 can communicate with each other through an internal connection channel to transfer control and / or data signals.
  • the device for sending multicast data instructs the core network user plane network element (for example, UPF) to send multicast data to the terminal through a part of the multiple data connections, reducing the redundancy group transmitted in the core network Broadcast data, thus avoiding the waste of transmission resources.
  • the core network user plane network element for example, UPF
  • the communication interface executes the receiving step and the sending step in the method embodiment, and other steps than the receiving step and the sending step can be executed by the processing unit or the processor.
  • the function of the specific unit can refer to the corresponding method embodiment, and will not be described in detail.
  • the size of the sequence number of each process does not mean the order of execution.
  • the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of this application.
  • each component that is, the processing unit (or processor), the storage unit (or memory), and the transceiver unit (communication interface) communicate with each other through an internal connection channel to transfer control and / Or data signal.
  • the above method embodiments of the present application may be applied to a processor, or the processor may implement the steps of the above method embodiments.
  • the processor may be an integrated circuit chip with signal processing capabilities.
  • each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the aforementioned processor may be a central processing unit (CPU), a network processor (NP) or a combination of CPU and NP, a digital signal processor (DSP), an application specific integrated circuit (application specific integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • CPU central processing unit
  • NP network processor
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA ready-made programmable gate array
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in this application can be directly embodied and completed by a hardware decoding processor, or can be completed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium in the art, such as a random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, and register.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the apparatus may include multiple processors or the processor includes multiple processing units.
  • the processor may be a single-CPU processor or a multi-CPU processor.
  • the memory is used to store computer instructions executed by the processor.
  • the memory may be a storage circuit or a memory.
  • the memory may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electronically Erase programmable EPROM (EEPROM) or flash memory.
  • the volatile memory may be a random access memory (random access memory, RAM), which is used as an external cache.
  • the memory may be independent of the processor, or may be a storage unit in the processor, which is not limited herein. Although only one memory is shown in the figure, the device may also include multiple memories or the memory includes multiple storage units.
  • the communication interface is used to realize the content interaction between the processor and other units or network elements.
  • the communication interface may be a transceiver circuit or a communication unit, or a transceiver.
  • the communication interface may also be a communication interface of the processor or a transceiver circuit.
  • the communication interface may be a transceiver chip.
  • the communication interface may also include a sending unit and / or a receiving unit. In a possible implementation,
  • the processor, the memory, and the communication interface may be connected to each other through a bus.
  • the bus may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus, etc.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, and a control bus.
  • the steps of the method or algorithm described in the disclosure of the present application may be implemented by hardware, or may be implemented by a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (read only memory (ROM), erasable programmable read-only memory (erasable (programmable ROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), registers, hard disk, removable hard disk, read-only compact disk (CD-ROM) or any other form of storage medium well known in the art.
  • An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and can write information to the storage medium.
  • the storage medium may also be an integral part of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium.
  • the computer instructions can be sent from a website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) Another website site, computer, server or data center for transmission.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media.
  • the available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, digital universal disc (DVD), or semiconductor media (eg, solid state disk (SSD)) Wait.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本申请提供了一种发送组播数据的方法和装置，该移动网包括核心网，该方法包括：核心网用户面网元与终端建立多个数据连接；核心网用户面网元确定第一数据连接，该多个数据连接包括第一数据连接；核心网用户面网元接收向终端发送的组播数据；核心网用户面网元通过第一数据连接向接入网网元发送所述组播数据。第一数据连接是多个数据连接中的部分数据连接，核心网用户面网元通过多个数据连接中的部分数据连接向终端发送组播数据，减少了核心网中传输的冗余组播数据，从而避免了传输资源的浪费。

Description

发送组播数据的方法和装置
本申请要求于2018年10月16日提交中国专利局、申请号为201811204975.0、申请名称为“发送组播数据的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，尤其涉及一种发送组播数据的方法和装置。
背景技术
组播通信是一种能够节省带宽的通信技术，组播源设备在向位于一个组播组的多个目标设备发送数据时仅传输一份数据，靠近目标设备的传输设备(例如，路由器)接收到该数据后，将该数据复制并分别分发给多个终端，由于组播源设备与传输设备之间仅传输了一份数据，因此，组播通信能够节省传输带宽。
在固网与移动网结合的网络中，固网通常作为组播源设备与传输设备之间的通信网络，移动网通常作为传输设备与终端之间的通信网络。组播数据在固网中仍然是单份传输，并通过移动网与固网衔接处的通信设备(即，衔接设备)传输至终端，上述衔接设备例如是用户面功能(user plane function，UPF)。
移动网中的数据传输与固网中的数据传输的不同之处在于：固网中传输设备通常是按照数据的目的地址逐跳转发，数据到达最接近终端的传输设备后，由该传输设备直接转发至终端；而移动网的传输机制由于终端具有可移动性而变得较为复杂，数据到达衔接设备后，需要经过承载于多个中间设备上的数据连接才能到达终端，该数据连接是终端专用的数据通道，因此，一份组播数据需要在衔接设备处被复制为多份，通过各个终端的数据连接发送至多个终端，从而使得移动网的中间设备传输了大量重复的组播数据，造成了移动网的传输资源的浪费。
发明内容
本申请提供了一种发送组播数据的方法和装置，能够减少移动网中传输的冗余组播数据，避免移动网的传输资源的浪费。
第一方面，提供了一种发送组播数据的方法，包括：核心网用户面网元与终端建立多个数据连接；核心网用户面网元确定第一数据连接，该多个数据连接包括第一数据连接；核心网用户面网元接收向终端发送的组播数据；核心网用户面网元通过第一数据连接向接入网网元发送所述组播数据。
在一种可能的实现方式中，核心网用户面网元通过一个接入网设备与多个终端建立多个数据连接。
第一数据连接是多个数据连接中的部分数据连接，核心网用户面网元通过多个数据连 接中的部分数据连接向终端发送组播数据，减少了核心网中传输的冗余组播数据，从而避免了传输资源的浪费。
在一种可能的实现方式中，核心网用户面网元确定第一数据连接，包括：核心网用户面网元根据接入网网元的标识信息确定通过接入网网元建立的至少一个数据连接；核心网用户面网元从至少一个数据连接中确定第一数据连接。
核心网用户面网元可以根据接入网网元的标识信息确定通过一个接入网网元建立的至少一个数据连接，并从该至少一个数据连接中选择第一数据连接来传输组播数据，无需其它网元(例如，核心网控制面网元)选择第一数据连接，从而减小了其它网元的负担。
在一种可能的实现方式中，核心网用户面网元从至少一个数据连接中确定第一数据连接，包括：核心网用户面网元从至少一个数据连接中确定第一个请求接收组播数据的数据连接为第一数据连接。
上述方案简单易实施。
在一种可能的实现方式中，所述方法还包括：当第一数据连接被删除或者去激活时，核心网用户面网元从至少一个数据连接中重新确定用于传输组播数据的数据连接。
上述方案可以避免组播数据的传输中断，提高核心网的可靠性。
在一种可能的实现方式中，核心网用户面网元根据接入网网元的标识信息确定通过接入网网元建立的至少一个数据连接之前，所述方法还包括：核心网用户面网元从核心网控制面网元接收第一控制面信息，第一控制面信息包括接入网网元的标识信息和下列终端信息中的至少一个：终端的标识ID、终端的因特网协议IP地址、多个数据连接的ID、多个数据连接的隧道端点标识TEID。
在一种可能的实现方式中，核心网用户面网元从核心网控制面网元接收第一控制面信息之前，所述方法还包括：核心网用户面网元向核心网控制面网元发送第一请求信息，第一请求信息用于请求获取与接入网网元关联的数据连接的标识信息，或者，第一请求信息用于请求获取与多个数据连接关联的接入网网元的标识信息。
在一种可能的实现方式中，核心网用户面网元从核心网控制面网元接收第一控制面信息之前，所述方法还包括：核心网用户面网元向核心网控制面网元发送第一用户面信息，第一用户面信息用于请求接收组播数据。
在一种可能的实现方式中，核心网用户面网元根据接入网网元的标识信息确定通过接入网网元建立的至少一个数据连接之前，所述方法还包括：核心网用户面网元通过多个数据连接从接入网网元接收第二用户面信息，第二用户面信息包括接入网网元的标识信息。
在一种可能的实现方式中，核心网用户面网元确定第一数据连接，包括：核心网用户面网元从核心网控制面网元接收第二控制面信息，第二控制面信息用于指示第一数据连接。
上述方案无需核心网用户面网元选择第一数据连接，减轻了核心网用户面网元的负担。
在一种可能的实现方式中，核心网用户面网元从核心网控制面网元接收第二控制面信息之前，所述方法还包括：核心网用户面网元向核心网控制面网元发送第二请求信息，第二请求信息用于请求获取传输组播数据的数据连接的标识信息。
在一种可能的实现方式中，核心网用户面网元从核心网控制面网元接收第二控制面信 息之前，所述方法还包括：核心网用户面网元向核心网控制面网元发送第一用户面信息，第一用户面信息用于请求接收组播数据。
在一种可能的实现方式中，第二控制面信息包括指示信息和下列终端信息中的至少一个：终端的ID、终端的IP地址、多个数据连接的ID、多个数据连接的TEID和指示信息，其中，指示信息用于指示是否通过传输上述终端信息的数据连接传输组播数据。
在一种可能的实现方式中，所述方法还包括：核心网用户面网元接收第一用户面信息，第一用户面信息用于请求接收组播数据；核心网用户面网元根据第一用户面信息统计组播数据的数据量。
虽然核心网用户面网元仅通过多个数据连接中的部分数据连接发送组播数据，但是，基于上述方案，核心网用户面网元仍然能够确定各个终端接收的组播数据的数据量，通信系统的计费网元可以根据核心网用户面网元统计的数据量进行计费，从而可以在减少核心网中传输的冗余组播数据的同时避免造成对通信系统的计费功能造成影响。
第二方面，本申请提供了一种通信方法，包括：核心网控制面网元确定多个数据连接，该多个数据连接为核心网用户面网元与终端建立的用于传输组播数据的连接；核心网控制面网元根据接入网网元的标识信息从多个数据连接中确定至少一个数据连接，该至少一个数据连接对应相同的接入网网元；核心网控制面网元向核心网用户面网元发送第二控制面信息，第二控制面信息用于指示至少一个数据连接中的第一数据连接。
核心网控制面网元根据上述方案指示核心网用户面网元(例如，UPF)通过多个数据连接中的部分数据连接向终端发送组播数据，减少了核心网中传输的冗余组播数据，从而避免了传输资源的浪费。
在一种可能的实现方式中，核心网控制面网元向核心网用户面网元发送第二控制面信息，包括：核心网控制面网元从核心网用户面接收第二请求信息，第二请求信息用于请求获取传输组播数据的数据连接的标识信息；核心网控制面网元根据第二请求信息向核心网用户面网元发送第二控制面信息。
在一种可能的实现方式中，核心网控制面网元向核心网用户面网元发送第二控制面信息，包括：核心网控制面网元从核心网用户面网元接收第一用户面信息，第一用户面信息用于请求接收组播数据；核心网控制面网元根据第一用户面信息向核心网用户面网元发送第二控制面信息。
在一种可能的实现方式中，核心网控制面网元根据接入网网元的标识信息从多个数据连接中确定至少一个数据连接，包括：核心网控制面网元从接入管理网元接收接入网网元的标识信息和下列终端信息中的至少一个：终端的ID、终端的IP地址、多个数据连接的ID、多个数据连接的TEID；核心网控制面网元根据接入网网元的标识信息和终端信息中的至少一个确定至少一个数据连接。
在一种可能的实现方式中，核心网控制面网元根据接入网网元的标识信息从多个数据连接中确定至少一个数据连接之前，所述方法还包括：核心网控制面网元从接入管理网元或者核心网用户面网元接收第二用户面信息，第二用户面信息包括接入网网元的标识信息。
在一种可能的实现方式中，所述方法还包括：当第一数据连接被删除或者去激活时，核心网控制面网元从至少一个数据连接中重新确定用于传输组播数据的数据连接。
上述方案可以避免组播数据的传输中断，提高核心网的可靠性。
在一种可能的实现方式中，所述方法还包括：核心网控制面网元接收第一用户面信息，第一用户面信息用于请求接收组播数据；核心网控制面网元根据第一用户面信息统计向各个终端发送的组播数据的数据量。
虽然核心网用户面网元仅通过多个数据连接中的部分数据连接发送组播数据，但是，基于上述方案，核心网控制面网元能够确定各个终端接收的组播数据的数据量，通信系统的计费网元可以根据核心网控制面网元统计的数据量进行计费，从而可以在减少核心网中传输的冗余组播数据的同时避免造成对通信系统的计费功能造成影响。
第三方面，本申请还提供了另一种通信方法，该方法包括：核心网控制面网元确定第一数据连接，所述第一数据连接属于核心网用户面网元与终端建立的多个数据连接，所述第一数据连接用于向接入网设备发送所述终端的组播数据；所述核心网控制面网元向所述核心网用户面网元发送所述第一数据连接的信息。
第四方面，本申请提供了一种发送组播数据的装置，该装置可以实现上述第一方面所涉及的方法中各个步骤所对应的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中，该装置包括处理器，该处理器被配置为支持该装置实现上述第一方面所涉及的方法中相应的功能。该装置还可以包括存储器，该存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。该装置还包括通信接口，该通信接口用于支持该装置与其它网元之间的通信。
第五方面，本申请提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被核心网设备的处理单元运行时，使得核心网设备执行第一方面所述的方法。
第六方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质中存储了计算机程序代码，该计算机程序代码被处理单元或处理器执行时，能够实现第一方面所述的方法。
第七方面，本申请提供了一种通信装置，该装置可以实现上述第二方面所涉及的方法中各个步骤所对应的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中，该装置包括处理器，该处理器被配置为支持该装置实现上述第二方面所涉及的方法中相应的功能。该装置还可以包括存储器，该存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。该装置还包括通信接口，该通信接口用于支持该装置与其它网元之间的通信。
在一种可能的实现方式中，上述装置包括处理单元和发送单元，
所述处理单元用于：确定多个数据连接，所述多个数据连接为核心网用户面网元与终端建立的用于传输组播数据的连接；根据接入网网元的标识信息从所述多个数据连接中确定至少一个数据连接，所述至少一个数据连接对应相同的接入网网元；
所述发送单元用于：向所述核心网用户面网元发送第二控制面信息，所述第二控制面信息用于指示所述至少一个数据连接中的第一数据连接。
在一种可能的实现方式中，所述装置还包括接收单元，
所述接收单元用于：从所述核心网用户面接收第二请求信息，所述第二请求信息用于请求获取传输所述组播数据的数据连接的标识信息；
所述发送单元具体用于：根据所述第二请求信息向所述核心网用户面网元发送所述第二控制面信息。
在一种可能的实现方式中，所述装置还包括接收单元，
所述接收单元用于：从所述核心网用户面网元接收第一用户面信息，所述第一用户面信息用于请求接收所述组播数据；
所述发送单元具体用于：根据所述第一用户面信息向所述核心网用户面网元发送所述第二控制面信息。
在一种可能的实现方式中，所述装置还包括接收单元，
所述接收单元用于：从接入管理网元接收所述接入网网元的标识信息和下列终端信息中的至少一个：
所述终端的标识ID、所述终端的因特网协议IP地址、所述多个数据连接的ID、所述多个数据连接的隧道端点标识TEID；
所述处理单元具体用于：根据所述接入网网元的标识信息和所述终端信息中的至少一个确定所述至少一个数据连接。
在一种可能的实现方式中，所述装置还包括接收单元，用于：
从接入管理网元或者所述核心网用户面网元接收第二用户面信息，所述第二用户面信息包括所述接入网网元的标识信息。
在一种可能的实现方式中，所述处理单元还用于：
当所述第一数据连接被删除或者去激活时，从所述至少一个数据连接中重新确定用于传输所述组播数据的数据连接。
在一种可能的实现方式中，所述装置还包括接收单元，
所述接收单元用于：接收第一用户面信息，所述第一用户面信息用于请求接收所述组播数据；
所述处理单元还用于：根据所述第一用户面信息统计所述组播数据的数据量。
第八方面，本申请提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被核心网设备的处理单元运行时，使得核心网设备执行第二方面所述的方法。
第九方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质中存储了计算机程序代码，该计算机程序代码被处理单元或处理器执行时，能够实现第二方面所述的方法。
第十方面，本申请提供了另一种通信装置，该装置可以实现上述第三方面所涉及的方法中各个步骤所对应的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中，该装置包括处理器，该处理器被配置为支持该装置实现上述第三方面所涉及的方法中相应的功能。该装置还可以包括存储器，该存储器用于与处理器耦合，其保存该装置必要的程序指令和数据。该装置还包括通信接口，该通信接口用于支持该装置与其它网元之间的通信。
第十一方面，本申请提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被核心网设备的处理单元运行时，使得核心网设备执行第三方面所述的方法。
第十二方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质中存储了计算机程序代码，该计算机程序代码被处理单元或处理器执行时，能够实现第三方面所述的方法。
附图说明
图1是一种适用于本申请的通信系统的示意图；
图2是本申请提供的一种发送组播数据的方法的示意图；
图3是本申请提供的一种建立会话的方法的示意图；
图4是本申请提供的一种获取接入网的标识信息的方法的示意图；
图5是本申请提供的另一种获取接入网的标识信息的方法的示意图；
图6是本申请提供的再一种获取接入网的标识信息的方法的示意图；
图7是本申请提供的再一种获取接入网的标识信息的方法的示意图；
图8是本申请提供的一种更新会话的方法的示意图；
图9是本申请提供的另一种发送组播数据的方法的示意图；
图10是本申请提供的一种发送组播数据的装置的示意图；
图11是本申请提供的另一种发送组播数据的装置的示意图；
图12是本申请提供的再一种发送组播数据的装置的示意图；
图13是本申请提供的再一种发送组播数据的装置的示意图。
具体实施方式
为了便于理解本申请的技术方案，首先对本申请涉及的概念做简单介绍。
1、终端(terminal)：可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的终端，移动台(mobile station，MS)，用户设备(user equipment，UE)，软终端，家庭网关，机顶盒等等。
2、(无线)接入网((radio)access network，(R)AN)网元：用于为特定区域的授权终端提供入网功能，并能够根据终端的级别、业务需求等使用不同质量的传输通道进行通信。
(R)AN网元能够管理接入网资源，为终端提供接入服务，进而完成数据在终端和核心网之间的传输，(R)AN网元可以是第三代合作伙伴计划(3 rd generation partnership project，3GPP)所定义的基站，也可以是非3GPP(non-3GPP)的接入网或者固移融合架构的接入网，例如接入网关(access gateway，AGF)或者固移互通功能(fixed mobile interworking function，FMIF)。任何接入移动网络核心网的接入网都属于本申请的AN。
3、用户面网元：用于分组路由和转发以及用户面数据的服务质量(quality of service，QoS)处理等。
在第五代(5 th-generation，5G)通信系统中，该用户面网元被称为UPF。在未来的通 信系统中，用户面网元仍可以被称为UPF，或者，还可以有其它的名称，本申请对此不做限定。用户面网元还可以是分组数据网络网关(packet data network gateway，PDN-GW)。
4、数据网络网元：用于提供传输数据的网络，例如，用于向终端转发从固网中接收到的组播数据。
在5G通信系统中，该数据网络网元被称为数据网络(data network，DN)。在未来通信系统中，数据网络网元仍可以被称为DN，或者，还可以有其它的名称，本申请对此不做限定。
5、接入管理网元：主要用于移动性管理和接入管理等，可以用于实现移动性管理实体(mobility management entity，MME)功能中除会话管理之外的其它功能，例如，合法监听以及接入授权/鉴权等功能。
在5G通信系统中，该接入管理网元被称为接入管理功能(access and mobility management function，AMF)。在未来通信系统中，接入管理网元仍可以被称为AMF，或者，还可以有其它的名称，本申请对此不做限定。
6、会话管理网元：主要用于会话管理、终端设备的因特网协议(internet protocol，IP)地址分配和管理、选择可管理用户平面功能、策略控制和收费功能接口的终结点以及下行数据通知等。
在5G通信系统中，该会话管理网元被称为会话管理功能(session management function，SMF)。在未来通信系统中，会话管理网元仍可以被称为SMF，或者，还可以有其它的名称，本申请不做限定。
可以理解的是，上述网元或者功能既可以是硬件设备中的网络元件，也可以是在专用硬件上运行软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。
此外，用于管理数据连接的网元可以被称为控制面(control plane)网元，例如，上述AMF和SMF均可被称为控制面网元。相应地，控制面网元生成的信息可以被称为控制面信息。
下面，将结合附图详细描述本申请提供的技术方案。
图1是一种适用于本申请的通信系统的示意图。该通信系统包括固网和移动网。
固网的一种可选的定义是：通过金属线或者光纤等固定媒体传输数据的网络。例如，通过电缆通信的传统以太网，或者，通过光纤通信的灵活以太网(flexible ethernet，FlexE)。
移动网的一种可选的定义是：通过电磁波传输数据的网络。例如，5G通信系统、私有网络、长期演进(long term evolution，LTE)通信系统、多火(multefire)通信系统、无线保真(wireless-fidelity，Wi-Fi)通信系统或蓝牙(Bluetooth)通信系统。
上述固网和移动网的定义仅是举例说明，以便于读者更容易理解本申请的技术方案，而不应被理解为对本申请的限定，例如，未来的通信网络依然适用于本申请的技术方案。
图1所示的通信系统中，移动网为5G通信系统，DN作为固网和移动网的衔接设备，从固网接收数据，并将该数据发送至UPF。UPF通过AN与各个UE之间建立数据连接，通过数据连接将数据发送至各个UE，在5G通信系统中，该数据连接例如是协议数据单元(protocol data unit，PDU)会话(session)。
以UE1为例，当UE1需要接收组播数据时，UE1可以向AN1发送网络群组管理协议(internet group management protocol，IGMP)加入消息(IGMP join message)，以下，将 IGMP加入消息简称为IGMP消息。IGMP消息携带组播组的标识，组播组的标识例如是组播地址。
AN1将IGMP消息转发至UPF，UPF接收到UE1发送的IGMP消息后，即可确定UE1加入了该组播地址对应的组播组。UPF从固网接收到该组播地址对应的组播消息后，可以通过与UE1之间的数据连接向UE1发送该组播地址对应的组播消息。
AMF和SMF用于维护AN1和UPF之间的数据连接。AN与DN之间的网络可以称为核心网。
上述通信系统仅是举例说明，适用于本申请的通信系统不限于此。
下面，将基于图1所示的通信系统为例对本申请提供的发送组播数据的方法进行说明。
图2示出了本申请提供的一种发送组播数据的方法的示意图。该方法200包括：
S210，UPF与终端建立多个数据连接。
该终端可以是一个UE，也可以是多个UE。
当上述终端为一个UE时，UPF可以通过两个或者更多个AN与该UE建立多个数据连接；当上述终端为多个UE时，UPF可以通过一个或者多个AN与该多个UE建立多个数据连接。UPF与终端建立数据连接的具体方法可以参考现有技术中的数据连接建立方法，为了简洁，在此不再赘述。
S220，UPF确定第一数据连接，上述多个数据连接包括第一数据连接。
第一数据连接是上述多个数据连接中的一个或者多个，第一数据连接的数量小于S210中的多个数据连接的数量。
例如，当前UE1和UE2处于同一个组播组，UPF与UE1和UE2分别建立了一个PDU会话，第一数据连接可以是UPF与UE1之间的PDU会话，也可以是UPF与UE2之间的PDU会话。
又例如，当前UE1、UE2和UE3处于同一个组播组，UPF与UE1、UE2和UE3分别建立了一个PDU会话，第一数据连接可以是UPF与UE1之间的PDU会话以及UPF与UE3之间的PDU会话，也可以是UPF与UE2之间的PDU会话以及UPF与UE3之间的PDU会话。
再例如，当前UE1和UE2处于同一个组播组，UPF与UE1和UE2分别建立了两个流(flow)，第一数据连接可以是UPF与UE1之间的两个流，也可以是UPF与UE2之间的两个流。
S230，UPF接收向终端发送的组播数据。
UPF可以根据从终端接收到的IGMP消息确定向终端发送的组播数据，若UPF从DN接收到的组播数据的组播地址与IGMP消息携带的组播地址相同，则UPF确定该组播数据为向终端发送的组播数据。
S240，UPF通过第一数据连接向AN发送所述组播数据。
由于第一数据连接承载于AN上，因此，UPF需要向AN发送组播数据，以便于AN向终端转发该组播数据。例如，AN1通过UE1的PDU会话接收到组播数据后，可以复制一份该组播数据，并将复制的组播数据发送给UE2。
方法200中，UPF通过多个数据连接中的部分数据连接向终端发送组播数据，减少了 核心网中传输的冗余组播数据，从而避免了传输资源的浪费。
方法200中，S220与S230的执行顺序可以交换，即，UPF可以先接收组播数据，再确定第一数据连接。
此外，本申请对UPF确定第一数据连接的具体方式不做限定。例如，UPF可以根据从其它网元获取的信息从多个数据连接中确定第一数据连接(即，主动选择方案)，也可以根据其它网元的指示从多个数据连接中确定第一数据连接(即，被动接受方案)。下面，将分别从这两个方面描述UPF确定第一数据连接的方法。
首先介绍UPF的主动选择方案。
作为一个可选的示例，S220包括：
UPF根据AN的标识信息确定通过该AN建立的至少一个数据连接；
UPF从至少一个数据连接中确定第一数据连接。
在上述方案中，UPF将对应同一个AN的标识信息的至少一个数据连接归为一组，从该至少一个数据连接中选择一个或少量的几个数据连接作为第一数据连接。由于AN能够复制组播数据，并向该AN覆盖范围内的终端发送组播数据，因此，上述方案能够满足组播传输的需求，同时减少了核心网中传输的冗余组播数据。
其中，UPF可以按照下列规则从至少一个数据连接中确定第一数据连接：
随机、预设策略、QoS或至少一个数据连接中第一个请求接收组播数据的连接。
以图1为例，若UPF与UE1和UE2分别建立了一个PDU会话，即，UPF与UE1建立了会话1，UPF与UE2建立了会话2。
则UPF可以从会话1和会话2中随机选择一个会话作为第一数据连接。
UPF也可以按照预设策略确定第一数据连接，例如，选择标识值较小的会话(即，会话1)作为第一数据连接。
UPF还可以从会话1和会话2中选择QoS较好的会话作为第一数据连接。
UPF还可以选择第一个请求接收组播数据的连接作为第一数据连接，例如，UPF首先通过会话2接收到包含组播地址A的IGMP消息，随后通过会话1接收到包含组播地址A的IGMP消息，则UPF可以将会话2作为第一数据连接，通过会话2向AN1发送组播地址A对应的组播数据，不再通过会话1向UE1发送组播数据，而是由AN1将通过会话2接收到的组播数据复制后向UE1转发。
上述AN的标识信息可以是AN的设备标识(identifier，ID)，也可以是AN的设备IP地址，还可以是其它用于标识AN的信息。例如，AN1对应3个虚拟局域网(virtual local area network，VLAN)，分别为VLAN1、VLAN2和VLAN3，AN2对应2个VLAN，分别为VLAN4和VLAN5。若UPF接收到携带VLAN1的IGMP消息和携带VLAN2的IGMP消息，则可以确定发送该两个IGMP消息的终端对应同一个AN。若UPF接收到携带VLAN1的IGMP消息和携带VLAN4的IGMP消息，则可以确定发送该两个IGMP消息的终端对应不同的AN。
上述对AN的标识信息的解释适用于本申请的所有实施例。
本申请对UPF获取AN的标识信息的方法不做限定。下面所述的几种UPF获取AN的标识信息的方法仅是举例说明。
方法一，UPF通过控制面信息获取AN的标识信息。
UPF根据AN的标识信息确定通过该AN建立的至少一个数据连接之前，方法200还包括：
UPF从SMF接收第一控制面信息，所述第一控制面信息包括AN的标识信息和下列终端信息中的至少一个：
终端的ID、终端的IP地址、S210中所述的多个数据连接的ID、多个数据连接的隧道端点标识(tunnel endpoint ID，TEID)。
SMF是数据连接的管理者，其保存有AN与各个数据连接的对应关系。SMF可以向UPF发送AN的标识信息和上述终端信息，向UPF指示AN与数据连接的关联关系。
在本申请的实施例中，在一种可能的实现方式中，AN与数据连接的关联关系是指终端通过AN建立的数据连接。
例如，第一控制面信息包含AN的标识信息为AN1，终端的ID为UE1和UE2，其中，UE1的数据连接为PDU会话1，UE2的数据连接为PDU会话2。UPF接收到第一控制面信息后，确定AN1对应的数据连接为PDU会话1和PDU会话2。换句话说，UPF接收到第一控制面信息后，确定PDU会话1和PDU会话2对应的AN为AN1。即，UPF根据第一控制面信息确定AN1与PDU会话1和PDU会话2的关联关系。
应理解，上述终端信息仅是举例说明，其它任意能够标识终端的数据连接的信息都可以被称为终端信息。
此外，本申请对第一控制面信息的具体形式不做限定，第一控制面信息可以承载于建立PDU会话的消息中，也可以在PDU会话建立之后单独发送。
图3示出了本申请提供的一种发送第一控制面信息的方法示意图。该方法包括：
S310，UE向AMF发送PDU会话建立请求(PDU session establishment request)，请求建立PDU会话。
S320，AMF向SMF发送创建会话管理上下文请求(create SM context request)，该请求携带。
S330，AMF向SMF发送创建会话管理上下文响应(create SM context response)。
S340，SMF向UPF发送会话建立/修改请求(session establish/modification request)。
S350，UPF向SMF发送会话建立/修改响应(session establish/modification response)。
在上述流程中，SMF通过“创建会话管理上下文请求”确定AN与PDU会话的对应关系，随后，可以在S340中向UPF发送携带终端信息和AN的标识信息的“会话建立/修改请求”，以便于UPF确定AN与PDU会话的关联关系，其中，“会话建立/修改请求”即第一控制面信息。
SMF可以主动向UPF发送第一控制面信息，也可以根据UPF发送的请求信息或者用户面信息向UPF发送第一控制面信息。
在一种可能的实现方式中，UPF从SMF接收第一控制面信息之前，方法200还包括：
UPF向SMF发送第一请求信息，第一请求信息用于请求获取与AN关联的数据连接的标识信息，或者，第一请求信息用于请求获取与多个数据连接关联的AN的标识信息。
UPF可以在接收到组播数据后发送第一请求信息，UPF也可以在接收到IGMP消息后发送第一请求信息。数据连接的标识信息例如是上文所述的终端信息。
例如，如图4所示，UPF分别与UE1、UE2和UE3建立了PDU会话，即，会话1、 会话2和会话3，UPF通过会话1、会话2和会话3接收到IGMP消息后，可以请求获取会话1、会话2和会话3各自关联的AN的标识信息，从而确定了AN与会话的关联关系。
又例如，如图4所示，UPF接收到组播数据后，可以请求获取AN1和AN2各自关联的PDU会话，从而确定了AN与会话的关联关系。
在一种可能的实现方式中，UPF也可以不发送第一请求信息，而是通过向SMF转发特定的用户面信息来确定AN与会话的关联关系。即，UPF从SMF接收第一控制面信息之前，方法200还包括：
UPF向SMF发送第一用户面信息，第一用户面信息用于请求接收所述组播数据。
第一用户面信息例如是IGMP消息，UPF接收到IGMP消息后将IGMP消息转发至SMF，触发SMF向UPF发送第一控制面信息(即，终端信息和AN的标识信息)。
例如，如图5所示，UPF分别与UE1、UE2和UE3建立了PDU会话，即，会话1、会话2和会话3，UPF通过会话1、会话2和会话3接收到IGMP消息后，将IGMP消息转发至SMF，SMF根据IGMP消息确定UPF需要转发组播数据，向UPF发送第一控制面信息(即，终端信息和AN的标识信息)。
此外，对于SMF来说，图5仅示出了SMF从UPF接收第一用户面信息，在一种可能的实现方式中，SMF还可以通过AMF接收第一用户面信息，并根据从AMF接收的第一用户面信息向UPF发送第一控制面信息，本申请对SMF如何获取第一用户面信息的方式不做限定。
上文所描述的实施例中，第一控制面信息均包括终端信息和AN的标识信息，第一控制面信息可以仅包括AN的标识信息，UPF根据从AN接收到的任意一个用户面信息确定AN与数据连接之间的关联关系。
如图6所示，与UE1、UE2和UE3连接的UPF与接收组播数据的UPF为同一个UPF，该UPF首先通过S340中的“会话建立/修改请求”获取AN1的标识信息，随后，该UPF通过会话1从AN1接收到第二用户面信息，则UPF可以确定会话1与AN1的关联关系，其中，第二用户面信息为任意一个用户面信息，第二用户面信息可以是IGMP消息，也可以其它消息。
上述方法仅适用于接收组播数据的UPF与AN直接连接的场景。若接收组播数据的UPF与AN没有直接连接，则第二用户面信息需要包含AN的标识信息。
上文描述了UPF通过控制面信息确定AN与会话的关联关系的方法，UPF也可以仅通过用户面信息来确定AN与会话的关联关系。
方法二，UPF通过用户面信息获取AN的标识信息。
如图7所示，与UE1、UE2连接的UPF为UPF1，与UE3连接的UPF为UPF2，接收组播数据的UPF为UPF0，则UPF0根据AN的标识信息确定通过该AN建立的至少一个数据连接之前，方法200还包括：
UPF0通过S210中所述的多个数据连接从AN接收第二用户面信息，所述第二用户面信息包括AN的标识信息。
在图7所示的场景中，UPF0不再从“会话建立/修改请求”获取AN的标识信息，而是从第二用户面信息中获取AN的标识信息。例如，UPF0通过会话1接收到IGMP消息1，IGMP消息1携带AN1的标识信息；UPF0通过会话2接收到IGMP消息2，IGMP消 息2携带AN1的标识信息；UPF0通过会话3接收到IGMP消息3，IGMP消息3携带AN2的标识信息；则UPF0可以确定通过AN1建立的至少一个数据连接为会话1和会话2，确定通过AN2建立的至少一个数据连接为会话3。UPF0可以通过会话1或会话2向AN1发送组播数据，通过会话3向AN2发送组播数据。
方法二不仅适用于图7所示的非直连场景，也适用于图6所示的直连场景。
下面，将详细介绍UPF的被动接受方案。
作为一个可选的示例，S220包括：
UPF从SMF接收第二控制面信息，所述第二控制面信息用于指示第一数据连接。
第二控制面信息包括指示信息和下列终端信息中的至少一个：
终端的ID、终端的IP地址、S210中所述的多个数据连接的ID、该多个数据连接的TEID和指示信息，其中，指示信息用于指示是否通过传输上述终端信息的数据连接传输组播数据。
第二控制面信息可以是图3中的会话建立/修改请求，也可以是会话建立完成后的控制面信息。
例如，如图1所示，UPF与UE1建立了会话1，与UE2建立了会话2，与UE3建立了会话3，SMF可以通过会话建立/修改请求向UPF发送指示会话1和会话3的第二控制面信息，也可以通过会话建立/修改请求向UPF发送指示会话2和会话3的第二控制面信息。UPF接收到第二控制面信息后，通过第二控制面信息指示的会话发送组播数据，无需自己选择会话，从而减小了UPF的负担。
与UPF的主动选择方案类似，在UPF的被动选择方案中，UPF接收第二控制面信息前可以向SMF发送请求信息或者用户面信息。
在一种可能的实现方式中，UPF从SMF接收第二控制面信息之前，方法200还包括：
UPF向SMF发送第二请求信息，第二请求信息用于请求获取传输组播数据的数据连接的标识信息。
UPF可以在接收到组播数据后发送第二请求信息，也可以在接收到IGMP消息后发送第二请求信息。数据连接的标识信息例如是上文所述的终端信息。
例如，如图4所示，UPF分别与UE1、UE2和UE3建立了PDU会话，即，会话1、会话2和会话3，UPF通过会话1、会话2和会话3接收到IGMP消息(携带组播地址)后，可以请求获取与上述组播地址对应的会话的标识信息。
又例如，如图4所示，UPF接收到组播数据(携带组播地址)后，可以请求获取与上述组播地址对应的会话的标识信息。
SMF根据第二请求信息向UPF发送第二控制面信息。
在一种可能的实现方式中，UPF从SMF接收第二控制面信息之前，方法200还包括：
UPF向SMF发送第一用户面信息，第一用户面信息用于请求接收组播数据。
第一用户面信息例如是IGMP消息，UPF接收到IGMP消息后将IGMP消息转发至SMF，触发SMF向UPF发送第二控制面信息(即，终端信息)。
例如，如图4所示，UPF分别与UE1、UE2和UE3建立了PDU会话，即，会话1、会话2和会话3，UPF通过会话1、会话2和会话3接收到IGMP消息后，将IGMP消息转发至SMF，SMF根据IGMP消息确定UPF需要转发组播数据，向UPF发送第一控制面 信息(即，终端信息)。
方法200中，若第一数据连接无法再传输数据，例如，第一数据连接被删除或者去激活，则UPF需要重新确定用于传输组播数据的数据连接。数据连接的释放过程如图8所示。
S810，UE(例如，UE1)向AMF发送PDU会话释放请求(PDU session release request)，请求释放会话1。
S820，AMF接收到PDU会话释放请求后可以向SMF发送更新会话管理上下文(update SM context)消息，通过更新会话管理上下文消息指示SMF更新会话1的上下文。
S830，SMF根据策略控制功能(policy control function，PCF)指示的策略确定删除会话1或者去激活会话1。若PCF指示会话管理策略终止(session management policy termination)，则SMF确定删除会话1.
S840，SMF向UPF发送会话释放请求(session release request)，请求删除会话1。
S850，UPF向SMF发送会话释放响应(session release response)。
SMF在S820中即可感知到会话1将无法再传输数据，SMF可以通过上述“会话释放请求”指示通过会话2传输组播数据，即，向UPF发送包含会话2的标识的“会话释放请求”。SMF也可以不指示UPF通过会话2传输组播数据，而是指示UPF自己选择AN1的另外一个会话传输组播数据。
此外，在方法200的基础上，本申请还提供了一种计费方法，即，方法200还包括：
UPF接收第一用户面信息，第一用户面信息用于请求接收组播数据；
UPF根据第一用户面信息统计组播数据的数据量。
上述第一用户面信息例如是IGMP消息，以图1为例，UPF接收到UE1发送的IGMP消息后，确定UE1加入了组播组，并统计向UE1发送的组播数据的数据量。
例如，UE1和UE2均位于相同的组播组，UPF通过会话2(UE2与UPF之间的数据连接)向AN1发送的组播数据的数据量为1兆(M)，则UPF确定UE1使用的数据量为1M，并且，UPF确定UE2使用的数据量为1M。
虽然UPF未通过会话1(UE1与UPF之间的数据连接)发送组播数据，但是，通过上述方法，UPF仍然能够确定UE1接收的组播数据的数据量，通信系统的计费网元可以根据UPF统计的数据量进行计费，从而可以在减少核心网中传输的冗余组播数据的同时避免造成对通信系统的计费功能造成影响。
上文主要从核心网用户面网元(即，UPF)的角度详细描述了本申请提供的发送组播数据的方法，下面，将从核心网控制面网元(例如，SMF)的角度描述本申请提供的发送组播数据的方法。
如图9所示，方法900包括：
S910，SMF确定多个数据连接，该多个数据连接为UPF与终端建立的用于传输组播数据的连接。
S920，SMF根据AN的标识信息从多个数据连接中确定至少一个数据连接，该至少一个数据连接对应相同的AN。
S930，SMF向UPF发送第二控制面信息，第二控制面信息用于指示所述至少一个数据连接中的第一数据连接。
本领域技术人员可以理解，SMF可以通过图3所示的流程确定多个数据连接，并按照与方法200中UPF确定第一数据连接的方法类似的方法确定第一数据连接。
例如，SMF可以按照下列规则从至少一个数据连接中确定第一数据连接：
随机、预设策略、QoS或至少一个数据连接中第一个请求接收组播数据的连接。
在方法200中以及对上述方案进行了详细描述，为了简洁，在此不再赘述。
因此，方法900中，SMF指示UPF通过多个数据连接中的部分数据连接向终端发送组播数据，减少了核心网中传输的冗余组播数据，从而避免了传输资源的浪费。
方法900中，SMF同样可以在第一数据连接被删除或者去激活时重新确定用于传输组播数据的数据连接。SMF也可以接收第一用户面信息(例如，IGMP消息)，根据第一用户面信息统计各个终端接收的组播数据的数据量。
上文详细介绍了本申请提供的发送组播数据的方法示例。可以理解的是，通信装置为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请可以根据上述方法示例对通信装置进行功能单元的划分，例如，可以将各个功能划分为各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的是，本申请中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
在采用集成的单元的情况下，图10示出了本申请提供的发送组播数据的装置的一种可能的结构示意图。装置1000包括：处理单元1001和接收单元1002和发送单元1003。处理单元1001用于控制装置1000执行图2所示的方法中的步骤。处理单元1001还可以用于执行本文所描述的技术的其它过程。装置1000还可以包括存储单元，用于存储装置1000的程序代码和数据。
例如，处理单元1001用于执行：与终端建立多个数据连接；确定第一数据连接，该多个数据连接包括第一数据连接。
处理单元1001还用于控制接收单元1002执行：接收向终端发送的组播数据。
处理单元1001还用于控制发送单元1003执行：通过第一数据连接向接入网网元发送所述组播数据。
处理单元1001可以是处理器或控制器，例如可以是中央处理器(central processing unit，CPU)，通用处理器，数字信号处理器(digital signal processor，DSP)，专用集成电路(application-specific integrated circuit，ASIC)，现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。发送单元1002和接收单元1003例如是通信接口，存储单元可以是存 储器。
当处理单元1001为处理器，发送单元1002和接收单元1003为通信接口，存储单元为存储器时，本申请所涉及的发送组播数据的装置可以为图11所示的装置。
参阅图11所示，该装置1100包括：处理器1101、通信接口1102和存储器1103(可选的)。其中，处理器1101、通信接口1102和存储器1103可以通过内部连接通路相互通信，传递控制和/或数据信号。
本领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
本申请提供的发送组播数据的装置，通过多个数据连接中的部分数据连接向终端发送组播数据，减少了核心网中传输的冗余组播数据，从而避免了传输资源的浪费。
在采用集成的单元的情况下，图12示出了本申请提供的发送组播数据的装置的一种可能的结构示意图。装置1200包括：处理单元1201和发送单元1202。处理单元1201用于控制装置1200执行图9所示的方法中的步骤。处理单元1201还可以用于执行本文所描述的技术的其它过程。装置1200还可以包括存储单元，用于存储装置1200的程序代码和数据。
例如，处理单元1201用于执行：确定多个数据连接，该多个数据连接为核心网用户面网元与终端建立的用于传输组播数据的连接；根据接入网网元的标识信息从多个数据连接中确定至少一个数据连接，该至少一个数据连接对应相同的接入网网元。
处理单元1201还用于控制发送单元1202执行：向核心网用户面网元发送第二控制面信息，第二控制面信息用于指示至少一个数据连接中的第一数据连接。
处理单元1201可以是处理器或控制器，例如可以是CPU，通用处理器，DSP，ASIC，FPGA或者其它可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。发送单元1202例如是通信接口，存储单元可以是存储器。
当处理单元1201为处理器，发送单元1202为通信接口，存储单元为存储器时，本申请所涉及的发送组播数据的装置可以为图13所示的装置。
参阅图13所示，该装置1300包括：处理器1301、通信接口1302和存储器1303(可选的)。其中，处理器1301、通信接口1302和存储器1303可以通过内部连接通路相互通信，传递控制和/或数据信号。
本领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
本申请提供的发送组播数据的装置，指示核心网用户面网元(例如，UPF)通过多个数据连接中的部分数据连接向终端发送组播数据，减少了核心网中传输的冗余组播数据，从而避免了传输资源的浪费。
上述装置实施例和方法实施例完全对应，例如通信接口执行方法实施例中的接收步骤和发送步骤，除接收步骤和发送步骤以外的其它步骤均可以由处理单元或处理器执行。具体单元的功能可以参考相应的方法实施例，不再详述。
在本申请各个实施例中，各过程的序号的大小并不意味着执行顺序的先后，各过程的 执行顺序应以其功能和内在逻辑确定，而不应对本申请的实施过程构成任何限定。
另外，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请图10-图13的装置中各个组件通信连接，即处理单元(或者处理器)、存储单元(或者存储器)和收发单元(通信接口)之间通过内部连接通路互相通信，传递控制和/或数据信号。本申请上述方法实施例可以应用于处理器中，或者由处理器实现上述方法实施例的步骤。处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。虽然图中仅仅示出了一个处理器，该装置可以包括多个处理器或者处理器包括多个处理单元。具体的，处理器可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。
存储器用于存储处理器执行的计算机指令。存储器可以是存储电路也可以是存储器。存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。存储器可以独立于处理器，也可以是处理器中的存储单元，在此不做限定。虽然图中仅仅示出了一个存储器，该装置也可以包括多个存储器或者存储器包括多个存储单元。
通信接口用于实现处理器与其他单元或者网元的内容交互。通信接口可以是收发电路或者通信单元，还可以是收发信机。通信接口还可以是处理器的通信接口或者收发电路。可选的，通信接口可以是一个收发芯片。该通信接口还可以包括发送单元和/或接收单元。在一种可能的实现方式中，
一种可能的实现方式中，处理器、存储器以及通信接口可以通过总线相互连接。总线可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。
本申请实施例中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请实施例中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为 比其他实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
在本申请的各实施例中，为了方面理解，进行了多种举例说明。然而，这些例子仅仅是一些举例，并不意味着是实现本申请的最佳实现方式。
在本申请的各实施例中，为了方便的描述，采用了请求消息，响应消息以及其他各种消息的名称。然而，这些消息仅仅是以举例方式说明需要携带的内容或者实现的功能，消息的具体名称并不对本申请的做出限定，例如：还可以是第一消息，第二消息，第三消息等。这些消息可以是具体的一些消息，可以是消息中的某些字段。这些消息还可以代表各种服务化操作。
本申请公开内容所描述的方法或者算法的步骤可以硬件的方式来实现，也可以是由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(random access memory，RAM)、闪存、只读存储器(read only memory，ROM)、可擦除可编程只读存储器(erasable programmable ROM，EPROM)、电可擦可编程只读存储器(electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、只读光盘(CD-ROM)或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者通过所述计算机可读存储介质进行传输。所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，数字通用光盘(digital versatile disc，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
以上所述的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请的具体实施方式而已，并不用于限定本申请的保护范围，凡在本申请的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请的保护范围之内。

Claims (29)

  1. 一种发送组播数据的方法，其特征在于，包括：
    核心网用户面网元与终端建立多个数据连接；
    所述核心网用户面网元确定第一数据连接，所述多个数据连接包括所述第一数据连接；
    所述核心网用户面网元接收向所述终端发送的组播数据；
    所述核心网用户面网元通过所述第一数据连接向接入网网元发送所述组播数据。
  2. 根据权利要求1所述的方法，其特征在于，所述核心网用户面网元确定第一数据连接，包括：
    所述核心网用户面网元根据所述接入网网元的标识信息确定所述终端通过所述接入网网元建立的至少一个数据连接，所述多个数据连接包括所述至少一个数据连接；
    所述核心网用户面网元从所述至少一个数据连接中确定所述第一数据连接。
  3. 根据权利要求2所述的方法，其特征在于，所述核心网用户面网元从所述至少一个数据连接中确定所述第一数据连接，包括：
    所述核心网用户面网元从所述至少一个数据连接中确定第一个请求接收所述组播数据的数据连接为所述第一数据连接。
  4. 根据权利要求2或3所述的方法，其特征在于，所述方法还包括：
    当所述第一数据连接被删除或者去激活时，所述核心网用户面网元从所述至少一个数据连接中重新确定用于传输所述组播数据的数据连接。
  5. 根据权利要求2至4中任一项所述的方法，其特征在于，所述核心网用户面网元根据所述接入网网元的标识信息确定所述终端通过所述接入网网元建立的至少一个数据连接之前，所述方法还包括：
    所述核心网用户面网元从核心网控制面网元接收第一控制面信息，所述第一控制面信息包括所述接入网网元的标识信息和下列终端信息中的至少一个：
    所述终端的标识ID、所述终端的因特网协议IP地址、所述多个数据连接的ID、所述多个数据连接的隧道端点标识TEID。
  6. 根据权利要求5所述的方法，其特征在于，所述核心网用户面网元从核心网控制面网元接收第一控制面信息之前，所述方法还包括：
    所述核心网用户面网元向所述核心网控制面网元发送第一请求信息，所述第一请求信息用于请求通过所述接入网网元建立的数据连接的标识信息，或者，所述第一请求信息用于请求所述接入网网元的标识信息。
  7. 根据权利要求5所述的方法，其特征在于，所述核心网用户面网元从核心网控制面网元接收第一控制面信息之前，所述方法还包括：
    所述核心网用户面网元向所述核心网控制面网元发送第一用户面信息，所述第一用户面信息用于请求接收所述组播数据。
  8. 根据权利要求2至4中任一项所述的方法，其特征在于，所述核心网用户面网元根据所述接入网网元的标识信息确定所述终端通过所述接入网网元建立的至少一个数据 连接之前，所述方法还包括：
    所述核心网用户面网元通过所述多个数据连接从所述接入网网元接收第二用户面信息，所述第二用户面信息包括所述接入网网元的标识信息。
  9. 根据权利要求1所述的方法，其特征在于，所述核心网用户面网元确定第一数据连接，包括：
    所述核心网用户面网元从核心网控制面网元接收第二控制面信息，所述第二控制面信息用于指示所述第一数据连接。
  10. 根据权利要求9所述的方法，其特征在于，所述核心网用户面网元从核心网控制面网元接收第二控制面信息之前，所述方法还包括：
    所述核心网用户面网元向所述核心网控制面网元发送第二请求信息，所述第二请求信息用于请求获取传输所述组播数据的数据连接的标识信息。
  11. 根据权利要求9所述的方法，其特征在于，所述核心网用户面网元从核心网控制面网元接收第二控制面信息之前，所述方法还包括：
    所述核心网用户面网元向所述核心网控制面网元发送第一用户面信息，所述第一用户面信息用于请求接收所述组播数据。
  12. 根据权利要求9至11中任一项所述的方法，其特征在于，所述第二控制面信息包括指示信息和下列终端信息中的至少一个：
    所述终端的标识ID、所述终端的因特网协议IP地址、所述多个数据连接的ID、所述多个数据连接的隧道端点标识TEID，其中，所述指示信息用于指示是否通过传输所述终端信息的数据连接传输所述组播数据。
  13. 根据权利要求1至12中任一项所述的方法，其特征在于，所述方法还包括：
    所述核心网用户面网元接收第一用户面信息，所述第一用户面信息用于请求接收所述组播数据；
    所述核心网用户面网元根据所述第一用户面信息统计所述组播数据的数据量。
  14. 一种发送组播数据的装置，其特征在于，包括处理单元、接收单元和发送单元，
    所述处理单元用于：控制所述装置与终端建立多个数据连接；确定第一数据连接，所述多个数据连接包括所述第一数据连接；
    所述接收单元用于：接收向所述终端发送的组播数据；
    所述发送单元用于：通过所述第一数据连接向接入网网元发送所述组播数据。
  15. 根据权利要求14所述的装置，其特征在于，所述处理单元具体用于：
    根据所述接入网网元的标识信息确定所述终端通过所述接入网网元建立的至少一个数据连接，所述多个数据连接包括所述至少一个数据连接；
    从所述至少一个数据连接中确定所述第一数据连接。
  16. 根据权利要求15所述的装置，其特征在于，所述处理单元具体用于：
    从所述至少一个数据连接中确定第一个请求接收所述组播数据的数据连接为所述第一数据连接。
  17. 根据权利要求15或16所述的装置，其特征在于，所述处理单元还用于：
    当所述第一数据连接被删除或者去激活时，从所述至少一个数据连接中重新确定用于传输所述组播数据的数据连接。
  18. 根据权利要求15至17中任一项所述的装置，其特征在于，所述接收单元还用于：
    从核心网控制面网元接收第一控制面信息，所述第一控制面信息包括所述接入网网元的标识信息和下列终端信息中的至少一个：
    所述终端的标识ID、所述终端的因特网协议IP地址、所述多个数据连接的ID、所述多个数据连接的隧道端点标识TEID。
  19. 根据权利要求18所述的装置，其特征在于，所述发送单元还用于：
    向所述核心网控制面网元发送第一请求信息，所述第一请求信息用于请求通过所述接入网网元建立的数据连接的标识信息，或者，所述第一请求信息用于请求所述接入网网元的标识信息。
  20. 根据权利要求18所述的装置，其特征在于，所述发送单元还用于：
    向所述核心网控制面网元发送第一用户面信息，所述第一用户面信息用于请求接收所述组播数据。
  21. 根据权利要求15至17中任一项所述的装置，其特征在于，所述接收单元还用于：
    通过所述多个数据连接从所述接入网网元接收第二用户面信息，所述第二用户面信息包括所述接入网网元的标识信息。
  22. 根据权利要求14所述的装置，其特征在于，所述处理单元具体用于：
    从核心网控制面网元接收第二控制面信息，所述第二控制面信息用于指示所述第一数据连接。
  23. 根据权利要求22所述的装置，其特征在于，所述发送单元还用于：
    向所述核心网控制面网元发送第二请求信息，所述第二请求信息用于请求获取传输所述组播数据的数据连接的标识信息。
  24. 根据权利要求22所述的装置，其特征在于，所述发送单元还用于：
    向所述核心网控制面网元发送第一用户面信息，所述第一用户面信息用于请求接收所述组播数据。
  25. 根据权利要求22至24中任一项所述的装置，其特征在于，所述第二控制面信息包括指示信息和下列终端信息中的至少一个：
    所述终端的标识ID、所述终端的因特网协议IP地址、所述多个数据连接的ID、所述多个数据连接的隧道端点标识TEID，其中，所述指示信息用于指示是否通过传输所述终端信息的数据连接传输所述组播数据。
  26. 根据权利要求14至25中任一项所述的装置，其特征在于，
    所述接收单元还用于：接收第一用户面信息，所述第一用户面信息用于请求接收所述组播数据；
    所述处理单元还用于：根据所述第一用户面信息统计所述组播数据的数据量。
  27. 一种通信装置，其特征在于，包括至少一个处理器，所述至少一个处理器用于与存储器耦合，读取并执行所述存储器中的指令，以实现如权利要求1至13中任一项所述的方法。
  28. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质上存储有计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1至13中任一项所述的方法。
  29. 一种通信系统，其特征在于，包括如权利要求14至26中任一项所述的发送组播数据的装置。
PCT/CN2019/111154 2018-10-16 2019-10-15 发送组播数据的方法和装置 WO2020078342A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19872948.5A EP3840426B1 (en) 2018-10-16 2019-10-15 Method and device for sending multicast data
US17/223,866 US20210227608A1 (en) 2018-10-16 2021-04-06 Method And Apparatus For Sending Multicast Data

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811204975.0 2018-10-16
CN201811204975.0A CN111065056B (zh) 2018-10-16 2018-10-16 发送组播数据的方法和装置

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/223,866 Continuation US20210227608A1 (en) 2018-10-16 2021-04-06 Method And Apparatus For Sending Multicast Data

Publications (1)

Publication Number Publication Date
WO2020078342A1 true WO2020078342A1 (zh) 2020-04-23

Family

ID=70284451

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/111154 WO2020078342A1 (zh) 2018-10-16 2019-10-15 发送组播数据的方法和装置

Country Status (4)

Country Link
US (1) US20210227608A1 (zh)
EP (1) EP3840426B1 (zh)
CN (1) CN111065056B (zh)
WO (1) WO2020078342A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113645712A (zh) * 2020-05-11 2021-11-12 华为技术有限公司 通信方法及装置
CN114071376B (zh) * 2020-08-03 2023-04-04 华为技术有限公司 一种通信方法、装置以及系统
CN112055383A (zh) * 2020-08-26 2020-12-08 广东省新一代通信与网络创新研究院 一种采用双终端提高数据链路传输可靠性的移动通信系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109769150A (zh) * 2017-11-09 2019-05-17 华为技术有限公司 一种传输组播业务的方法和设备
CN110012437A (zh) * 2018-01-05 2019-07-12 华为技术有限公司 一种组播报文的发送方法、装置及系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004229117A (ja) * 2003-01-24 2004-08-12 Ntt Docomo Inc 通信システム、マルチキャスト交換装置、通信方法
CN101155053B (zh) * 2006-09-25 2011-03-30 华为技术有限公司 一种组播/广播业务实现方法和系统
EP2992727B1 (en) * 2013-04-30 2017-03-01 Telefonaktiebolaget LM Ericsson (publ) Multicast group reuse in cellular network multicast transport
EP3249959B1 (en) * 2015-02-17 2020-09-16 Huawei Technologies Co., Ltd. Data transmission method and device
CN106792563A (zh) * 2015-11-23 2017-05-31 中兴通讯股份有限公司 一种多媒体广播多播业务处理方法及系统

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109769150A (zh) * 2017-11-09 2019-05-17 华为技术有限公司 一种传输组播业务的方法和设备
CN110012437A (zh) * 2018-01-05 2019-07-12 华为技术有限公司 一种组播报文的发送方法、装置及系统

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
HUAWEI: "Update to Solution 15", 3GPP TSG-SA WG2 MEETING #129BIS, S2-1812414, 30 November 2018 (2018-11-30), pages 2 - 1812414, XP051499117 *
HUAWEI: "Update to Solution 15: Support of traffic routing in Backbone UP", 3GPP TSG-SA WG2 MEETING #129, 19 October 2018 (2018-10-19), pages 2 - 1811344, XP051539911 *
HUAWEI: "Update to Solution 15: Support of traffic routing in Backbone UP", 3GPP TSG-SA WG2 MEETING #129, 9 October 2018 (2018-10-09), pages 2 - 1810787, XP051539736 *
See also references of EP3840426A4

Also Published As

Publication number Publication date
EP3840426A4 (en) 2021-09-22
US20210227608A1 (en) 2021-07-22
EP3840426B1 (en) 2022-12-07
CN111065056A (zh) 2020-04-24
EP3840426A1 (en) 2021-06-23
CN111065056B (zh) 2022-04-05

Similar Documents

Publication Publication Date Title
CN111586860B (zh) 一种通信方法及装置
WO2020199896A1 (zh) 一种业务流路由控制方法、装置及系统
WO2019196608A1 (zh) 传输数据的方法和装置
WO2020001572A1 (zh) 通信方法及装置
WO2020078342A1 (zh) 发送组播数据的方法和装置
WO2019076306A1 (zh) 数据传输通道的处理方法、装置和系统
WO2020168789A1 (zh) 一种通信方法及装置
WO2020001562A1 (zh) 一种通信方法及装置
WO2020147756A1 (zh) 一种会话管理方法及装置
CN110831094A (zh) 一种数据传输通道的处理方法及装置
US20230019215A1 (en) TSC-5G QoS MAPPING WITH CONSIDERATION OF ASSISTANCE TRAFFIC INFORMATION AND PCC RULES FOR TSC TRAFFIC MAPPING AND 5G QoS FLOWS BINDING
WO2020238327A1 (zh) 一种用户面连接的建立方法、装置及系统
WO2021135650A1 (zh) 通信方法及装置
WO2020083269A1 (zh) 一种建立多路径连接的子流的方法、装置和系统
WO2019019997A1 (zh) 一种组播数据传输方法、相关设备及通信系统
WO2022052798A1 (zh) QoS控制方法、装置及处理器可读存储介质
WO2017067007A1 (zh) 服务质量的控制方法、设备及系统
WO2020169039A1 (zh) 一种策略管理的方法及装置
WO2019136606A1 (zh) 中继传输的方法和中继节点
WO2020063316A1 (zh) 通信方法和装置
US20160302121A1 (en) Method and apparatus for transmitting ip packet using segment routing
WO2020034869A1 (zh) 一种业务流的传输方法、通信方法及装置
US10193941B2 (en) Interworking between first protocol entity of stream reservation protocol and second protocol entity of routing protocol
WO2020156258A1 (zh) 一种通信方法及装置
WO2021008402A1 (zh) 支持端口关联的方法、网关选择的方法及通信设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19872948

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2019872948

Country of ref document: EP

Effective date: 20210319

NENP Non-entry into the national phase

Ref country code: DE