WO2022033168A1 - 一种mbs业务数据传输方法和网络侧装置及设备 - Google Patents

一种mbs业务数据传输方法和网络侧装置及设备 Download PDF

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Publication number
WO2022033168A1
WO2022033168A1 PCT/CN2021/100708 CN2021100708W WO2022033168A1 WO 2022033168 A1 WO2022033168 A1 WO 2022033168A1 CN 2021100708 W CN2021100708 W CN 2021100708W WO 2022033168 A1 WO2022033168 A1 WO 2022033168A1
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Prior art keywords
mbs
context
target cell
session context
channel
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PCT/CN2021/100708
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English (en)
French (fr)
Inventor
张大钧
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大唐移动通信设备有限公司
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Priority to US18/019,483 priority Critical patent/US20230319905A1/en
Priority to EP21855223.0A priority patent/EP4199582A4/en
Publication of WO2022033168A1 publication Critical patent/WO2022033168A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • 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
    • H04W76/20—Manipulation of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a method for transmitting MBS service data and a network-side device and device.
  • the existing 4G MBMS (Multimedia Broadcast Multicast Service) technology mainly includes three modes:
  • MCE Multi-cell/multicast Coordination Entity
  • CN Core Network
  • MCE decides to MBMS holder uses SC-PTM
  • MCE sends MBMS session start request to eNB (Evolved Node B, evolved base station);
  • eNB sends MBMS session start response to MCE;
  • eNB triggers UE (User Equipment) to perform single-cell point-to-multipoint business data received.
  • UE User Equipment
  • the interested UE only needs to read the SC-MCCH (Single Cell-MBMS Control Channel, single-cell multicast control channel) information to learn the SC-MTCH (Single Cell-MBMS l Channel single-cell-multicast service) channel) scheduling information, the MBMS service can be received in the idle state or the connected state.
  • SC-MCCH Single Cell-MBMS Control Channel, single-cell multicast control channel
  • SC-MTCH Single Cell-MBMS l Channel single-cell-multicast service
  • the UE receives the MBMS service in the unicast mode through the PDU (Protocol Data Unit, Protocol Data Unit) session establishment process.
  • PDU Protocol Data Unit, Protocol Data Unit
  • This mode requires the UE to establish a session process in the connected state, and the MBMS service can only complete the unicast transmission of the MBMS service through the traditional unicast PDU session establishment process.
  • the 4G network node E-UTRAN will determine that some UEs that are receiving MBMS services in the PTP (Point To Point, point-to-point mode) mode need to switch to the PTM (Point To Multiploint, point-to-multipoint mode) mode for data reception.
  • the PTM mode means the transmission mode of MBSFN.
  • the E-UTRAN will send an RRC signaling message to notify the corresponding UE. If the UE decides to terminate the data reception of the PTP, it will send a signaling message to notify the E-UTRAN again. Finally, the UE completes the transition from the PTP mode to the MBSFN mode.
  • 5G NR as a new-generation wireless access technology network, also has requirements for multicast/broadcast services.
  • 5G architecture there are UEs in the in-active state. In order for these UEs to maintain the continuity of MBS (Multimedia Broadcast Service) reception, new enhancement technologies need to be adopted to expand the current MBS service transmission. mechanism.
  • MBS Multimedia Broadcast Service
  • the present application provides an MBS service data transmission method and a network side device and equipment, which are used to solve the problem of how to ensure the continuity of the UE's reception of the MBS service in the deactivated state.
  • a method for transmitting MBS service data is provided, which is applied to a network side device of a target cell, and the method includes:
  • MBS data transmission is performed through a common forwarding channel with the source cell and/or an N3 channel with the core network.
  • perform MBS data transmission including:
  • the target cell After the target cell establishes the MBS session context, configure the MBS resources and send them to the UE through an RRC connection message;
  • perform MBS data transmission including:
  • the target cell After the target cell establishes the MBS session context, configure MBS resources, and send it to the UE through an RRC connection release message or an RRC reject message;
  • MBS data is transmitted to the UE in the deactivated state.
  • obtain MBS session context related information from the source cell including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • the method further includes:
  • the RRC connection recovery request message indicating the establishment of the MBS session context is sent.
  • perform MBS data transmission through a common forwarding channel with the source cell including:
  • a public forwarding address request process is initiated to the source cell, which is the process of indicating the XN-U address associated with the reused UE, or the newly defined non-UE association process.
  • the method further includes:
  • a context release process of the MBS session is initiated to release the common forwarding channel.
  • perform MBS data transmission through the N3 channel with the core network including:
  • N3 channel establishment process is a reused UE-associated path switching process, or a newly defined non-UE-associated MBS session establishment request process
  • the MBS data sent by the UPF is received through the N3 channel, and the MBS data is sent to the UE.
  • the method further includes:
  • a method for transmitting MBS service data of a multimedia broadcast service, applied to a network side device of a source cell includes:
  • the method further includes: establishing a common forwarding channel with the target cell and transmitting MBS data, so that the target cell sends the MBS data to the UE.
  • sending MBS session context related information to the target cell including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • establishing a common forwarding channel with the target cell and transmitting MBS data including:
  • MBS data sent to the target cell on the common forwarding channel according to the desired MBS session context list information
  • the common forwarding address request process is a reused UE-associated XN-U address indication process, or a newly defined non-UE association process.
  • the method also includes:
  • a context release process of the MBS session is initiated to release the common forwarding channel.
  • a network side device including: a memory and a processor;
  • the memory is used to store computer programs
  • the processor is used to read the program in the memory and execute:
  • a UE context request message is sent to the source cell, the MBS session context related information is obtained from the source cell, and the MBS data transmission is performed after the target cell establishes the MBS session context.
  • the processor is further configured to perform MBS data transmission through a common forwarding channel with the source cell and/or an N3 channel with the core network.
  • the processor performs MBS data transmission, including:
  • the target cell After the target cell establishes the MBS session context, configure the MBS resources and send them to the UE through an RRC connection message;
  • the processor performs MBS data transmission, including:
  • the target cell After the target cell establishes the MBS session context, configure MBS resources, and send it to the UE through an RRC connection release message or an RRC reject message;
  • MBS data is transmitted to the UE in the deactivated state.
  • the processor obtains MBS session context related information from the source cell, including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • the processor is also used for:
  • the RRC connection recovery request message indicating the establishment of the MBS session context is sent.
  • the processor performs MBS data transmission through a common forwarding channel with the source cell, including:
  • a public forwarding address request process is initiated to the source cell, which is the process of indicating the XN-U address associated with the reused UE, or the newly defined non-UE association process.
  • the processor is also used for:
  • a context release process of the MBS session is initiated to release the common forwarding channel.
  • the processor performs MBS data transmission through the N3 channel with the core network, including:
  • N3 channel establishment process is a reused UE-associated path switching process, or a newly defined non-UE-associated MBS session establishment request process
  • the MBS data sent by the UPF is received through the N3 channel, and the MBS data is sent to the UE.
  • the processor is also used for:
  • a network-side device including: a memory and a processor;
  • the memory is used to store computer programs
  • the processor is used to read the program in the memory and execute:
  • the processor is further configured to: establish a common forwarding channel with the target cell and transmit MBS data, so that the target cell sends the MBS data to the UE.
  • the processor sends MBS session context related information to the target cell, including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • the processor establishes a common forwarding channel with the target cell and transmits MBS data, including:
  • MBS data sent to the target cell on the common forwarding channel according to the desired MBS session context list information
  • the common forwarding address request process is a reused UE-associated XN-U address indication process, or a newly defined non-UE association process.
  • the processor is also used for:
  • a context release process of the MBS session is initiated to release the common forwarding channel.
  • a network side device including:
  • the MBS context acquisition module is used to acquire the MBS session context related information from the source cell by sending a UE context request message to the source cell for the deactivated UE that has moved to the target cell;
  • the MBS data transmission module is configured to perform MBS data transmission after the target cell establishes the MBS session context.
  • the network side device further includes:
  • the establishment module it is used to establish a public forwarding channel with the source cell, and/or establish an N3 channel with the core network;
  • the MBS data forwarding module is configured to transmit MBS data through the common forwarding channel and/or the N3 channel.
  • the MBS data transmission module performs MBS data transmission, including:
  • the target cell After the target cell establishes the MBS session context, configure the MBS resources and send them to the UE through an RRC connection message;
  • the MBS data transmission module performs MBS data transmission, including:
  • the target cell After the target cell establishes the MBS session context, configure MBS resources, and send it to the UE through an RRC connection release message or an RRC reject message;
  • MBS data is transmitted to the UE in the deactivated state.
  • the MBS context acquisition module acquires MBS session context related information from the source cell, including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • the MBS context acquisition module is also used to:
  • the RRC connection recovery request message indicating the establishment of the MBS session context is sent.
  • the MBS data forwarding module performs MBS data transmission through a common forwarding channel with the source cell, including:
  • a public forwarding address request process is initiated to the source cell, which is the process of indicating the XN-U address associated with the reused UE, or the newly defined non-UE association process.
  • the channel release module is used for initiating the context release process of the MBS session to release the public forwarding channel.
  • perform MBS data transmission through the N3 channel with the core network including:
  • N3 channel establishment process is a reused UE-associated path switching process, or a newly defined non-UE-associated MBS session establishment request process
  • the MBS data sent by the UPF is received through the N3 channel, and the MBS data is sent to the UE.
  • the channel establishment module is also used for:
  • a network-side device including:
  • a request receiving module configured to receive a context request message sent by the target cell for the deactivated UE
  • the MBS context sending module is configured to send MBS session context related information to the target cell, so that the target cell establishes an MBS session context and performs MBS data transmission.
  • the network side device further includes:
  • a forwarding channel establishment module configured to establish a public forwarding channel with the target cell
  • An MBS transmission module configured to transmit MBS data through the common forwarding channel, so that the target cell sends the MBS data to the UE.
  • the MBS context sending module sends MBS session context related information to the target cell, including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • the MBS transmission module is specifically used for:
  • MBS data sent to the target cell on the common forwarding channel according to the desired MBS session context list information
  • the common forwarding address request process is a reused UE-associated XN-U address indication process, or a newly defined non-UE association process.
  • the forwarding channel release module is used for initiating the context release process of the MBS session to release the common forwarding channel.
  • a chip is provided, wherein the chip is coupled to a memory in a device, so that the chip calls program instructions stored in the memory when running, so as to implement the above aspects of the embodiments of the present application and any possible methods involved in the various aspects.
  • a computer-readable storage medium where program instructions are stored in the computer storage medium, and when the computer storage medium is run on a computer, the computer is made to execute the above-mentioned aspects of the embodiments of the present application and the various aspects related to the any of the methods that may be involved.
  • a computer program product is provided, which, when the computer program product is run on an electronic device, enables the electronic device to execute and implement the above-mentioned aspects and any aspects involved in the embodiments of the present application. A possible method involved.
  • the solution provided in this application allows the UE in the In-active state to trigger a new MBS context establishment process on the new 5G RAN target node to transmit MBS data, so that the In-active state can be dynamically and flexibly ensured.
  • Fig. 1 is the main MBMS session data transmission flow chart under SC-PTM mode
  • Fig. 2 is a kind of flow chart of receiving MBMS service in unicast mode
  • Fig. 3 is a kind of flow chart of 4G MBSFN to unicast bearer conversion
  • FIG. 4 is a schematic diagram of an MBS service data transmission system provided in an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another MBS service data transmission system provided in an embodiment of the present application.
  • FIG. 6 is a flowchart of MBS data transmission by restoring the MBS session context provided in an embodiment of the present application
  • FIG. 7 is a flowchart of a method for transmitting MBS service data through RRC connection recovery provided in an embodiment of the present application
  • FIG. 8 is a flowchart of a method for transmitting data of a multimedia broadcasting service MBS service provided in an embodiment of the present application
  • FIG. 9 is another method for transmitting MBS service data of a multimedia broadcasting service provided in an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a network side device serving as a target cell base station provided in an embodiment of the application;
  • FIG. 11 is a schematic structural diagram of a network side device serving as a source cell base station provided in an embodiment of the application;
  • FIG. 12 is a schematic structural diagram of a network side device serving as a core network entity device provided in an embodiment of the application;
  • FIG. 13 is a schematic structural diagram of a network side device applied to a target cell according to an embodiment of the application
  • FIG. 14 is a schematic structural diagram of a network side device applied to a source cell provided in an embodiment of the application;
  • FIG. 15 is a schematic structural diagram of a network side device applied to a core network entity according to an embodiment of the application.
  • the existing 4G MBMS technology mainly includes three modes:
  • Step 1 CN sends an MBMS session start request to MCE;
  • Step 1a CN sends MBMS session start response to MCE
  • Step 2 MCE decides to use SC-PTM for MBMS holders
  • Step 3 the MCE sends an MBMS session start request to the eNB;
  • Step 3a the eNB sends an MBMS session start response to the MCE
  • Step 4 the eNB triggers the UE to perform single-cell point-to-multipoint.
  • the interested UE only needs to read the SC-MCCH information and learn the scheduling information of the SC-MTCH, and then it can receive the MBMS service in the idle state or connected.
  • the flow of receiving MBMS services in unicast mode mainly includes:
  • Step 1 the UE sends a PDU session establishment request to the AMF;
  • Step 2 AMF sends a PDU session resource establishment request to gNB;
  • Step 3 gNB sends RRC reconfiguration information to UE;
  • Step 4 the UE rebuilds the data radio bearer
  • Step 5 the UE sends the RRC reconfiguration to the gNB to complete;
  • Step 6 gNB sends PDU session resource establishment response to AMF
  • Step 7 the gNB, UPF and UE perform uplink data update.
  • the MBMS service can only complete the unicast transmission of the MBMS service through the traditional unicast PDU session establishment process.
  • the 4G network node E-UTRAN will determine that some UEs that are receiving MBMS services in the PTP mode need to switch to the PTM mode for data reception.
  • the PTM mode here refers to the MBSFN transmission mode.
  • E-UTRAN will send an RRC signaling message to notify the corresponding UE that the MBMS service in a certain PTP mode is converted to PTM mode for transmission, and sends the relevant information of the PTM mode;
  • Step 2 the UE responds to the above message;
  • Step 3 if the UE After deciding to terminate the data reception of the PTP, the E-UTRAN will be notified by sending a signaling message again, specifically, the UE notifying the E-UTRAN to stop the PTP transmission of the MBMS service; step 4, the E-UTRAN responds to the above message.
  • the UE completes the transition from the PTP mode to the MBSFN mode.
  • the existing 4G MBMS technology only allows the UE to switch to the statically planned target cell, and there are only two receiving requirements of the connected state and the idle state. In this way, under the 5G NR architecture, the transmission of the MBMS service received by the UE in the in-active state is bound to be limited.
  • an embodiment of the present application provides a solution for MBS service data transmission.
  • a UE in an In-active state moves to a new target cell, if the target cell does not have an MBS service context of interest to it , allowing the UE to trigger the establishment of the corresponding MBS context in the target cell by initiating the RRC resume process, so that the target cell can transmit the MBS service to the UE based on the established context.
  • the embodiment of the present application also provides another MBS service data transmission scheme.
  • the target cell On the basis of establishing the corresponding MBS context in the target cell, the target cell establishes and maintains the data transmission channel of the MBS session in two ways according to different situations.
  • One of the ways A common forwarding channel with the source cell is established for the target cell, and another way is to establish an N3 channel between the target cell and the core network.
  • both of the above two channels are established, and after the common forwarding channel is released, the N3 channel is maintained for M3 data transmission.
  • the MBS service data transmission system includes:
  • the first network-side device 401 which may be a target cell base station, is used to obtain the MBS session context-related information from the source cell by sending a UE context request message to the source cell for a UE in a deactivated state that moves to the target cell, and in the After the target cell establishes the MBS session context, it performs MBS data transmission;
  • the second network-side device 402 which may be a source cell base station, is configured to send MBS session context related information to the target cell based on the UE context request message sent by the UE in the deactivated state of the target cell, so that the target cell can establish MBS Session context and MBS data transfer;
  • the user terminal UE400 is used to move from a source cell to a target cell in a deactivated state, and perform MBS data transmission in the target cell.
  • the above-mentioned MBS service data transmission system solution to MBS service transmission is a way of performing MBS data transmission by restoring the MBS session context.
  • the first network side device is further configured to establish a common forwarding channel with the target cell and transmit MBS data, so that the target cell sends the MBS data to the UE;
  • the second network side device is further configured to establish a common forwarding channel with the target cell and transmit MBS data, so that the target cell sends the MBS data to the UE.
  • the above-mentioned MBS service data transmission system solves the MBS service transmission as a way of performing MBS data transmission through a common forwarding channel.
  • the first network-side device in the MBS service data transmission system provided in the embodiment of the present application is further configured to transmit MBS data through the N3 channel with the core network;
  • the system further includes: a third network side device for establishing an N3 channel with the target cell for transmitting MBS data to the UE in the deactivated state; and sending the MBS data to the target cell through the N3 channel, so that the target The cell sends the MBS data to the UE in the deactivated state.
  • the above-mentioned MBS service data transmission system solution to MBS service transmission is referred to as a way of performing MBS data transmission through an N3 channel.
  • the MBS service data transmission system provided in the embodiment of the present application includes:
  • the first network-side device 501 which can be a target cell base station, is used to obtain the MBS session context-related information from the source cell by sending a UE context request message to the source cell for a UE in a deactivated state that moves to the target cell.
  • the cell After the cell establishes the MBS session context, it performs MBS data transmission through the public forwarding channel with the source cell and the N3 channel with the core network;
  • the second network-side device 502 which may be a source cell base station, is configured to receive a context request message sent by the target cell in the deactivated state UE; send MBS session context-related information to the target cell, and establish a common forwarding with the target cell channel and transmit MBS data, so that the target cell sends the MBS data to the UE;
  • the third network-side device 503, which may be a core network entity device, is used to establish an N3 channel with the target cell for transmitting MBS data to the UE in the deactivated state; through the N3 channel, the MBS data is sent to the target cell, so that the sending, by the target cell, the MBS data to the UE in a deactivated state;
  • the user terminal UE500 is used to move from a source cell to a target cell in a deactivated state, and perform MBS data transmission in the target cell.
  • the above-mentioned MBS service data transmission system solves the MBS service transmission as a way of performing MBS data transmission through a common forwarding channel and an N3 channel.
  • the user terminal UE may specifically refer to an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device.
  • the access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and mobile stations in 5G networks or subscriptions in future evolved Public Land Mobile Network (PLMN) networks equipment, etc.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • PLMN Public Land Mobile Network
  • the first/second network side equipment may be a next-generation base station (generation Node B, gNB) in the 5G system, which may be a Global System of Mobile communication (GSM) system or a Code Division Multiple Access (Code Division Multiple Access) , CDMA) in the base station (Base Transceiver Station, BTS), also can be the base station (NodeB, NB) in the Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, can also be Long Term Evolution (Long Term Evolution) , LTE) system evolution base station (Evolutional Node B, eNB or eNodeB) and so on.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • BTS Base Transceiver Station
  • NodeB, NB Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • WCDMA Long Term Evolution
  • LTE Long Term Evolution
  • Evolutional Node B, eNB or eNodeB Evolution Node B
  • the third network side device may be a UPF entity in the 5G system.
  • Mode 1 MBS data transmission by restoring the MBS session context
  • the UE When a UE in the In-active state moves to a new target cell, if the target cell does not have an MBS service context that it is interested in, the UE is allowed to initiate the RRC resume process.
  • the UE in the In-active state moves to the target cell, determines that the target cell cannot meet the MBS session requirements, sends an RRC connection recovery request message to the first network side device, and the first network side device receives the message.
  • the active UE determines that the target cell cannot meet the MBS session requirements, it sends an RRC connection recovery request message carrying indication information similar to "MBS session establishment" to indicate the establishment of the MBS session context.
  • the Resume Cause in the RRC resume request message of the indication information carries indication information similar to "MBS session establishment"; or
  • the indication information RRC resume request message carries a list of MBS session services that the UE is interested in.
  • the first network-side device After receiving the RRC connection recovery request message, the first network-side device determines that it needs to establish an MBS session context in the target cell according to the instruction, and the first network-side device will initiate the MBS context recovery process to the second network measurement device of the source cell, and through this process , and obtain the relevant information about the service context of the MBS session to be established. Specifically, send a UE context request message to the source cell, indicate through the UE context request message that the source cell needs to return the corresponding MBS session service context related information, and receive the UE context response message returned by the source cell, where the UE context response message carries MBS session service context related information.
  • the UE context request message sent by the source cell carries the MBS session context list information existing in the target cell
  • the target cell determines the MBS session services existing in the source cell, Determine which MBS services the source cell does not have according to the existing MBS session service context related information saved by itself, so as to send the new MBS service session context information to the source cell, that is, the UE context request message sent to the source cell carries New MBS service session context related information that does not exist in the target cell.
  • the UE context request message sent by the source cell to the target cell does not carry any MBS service session related information, but indicates that the target cell needs to return the MBS service session context information.
  • the specific instruction method can be explicit or implicit instructions.
  • the target cell After receiving the UE context request message, the target cell feeds back all the locally stored information related to the context of the MBS service session, that is, the UE context response message returned by the target cell carries all the relevant information about the context of the MBS service session related to the UE;
  • the UE context request message sent by the source cell carries the MBS session context list information expected by the UE, and after receiving the UE context request message, the target cell locally queries the MBS service session context expected by the UE
  • the relevant information is sent to the source cell, that is, the UE context response message sent by the target cell to the source cell carries the relevant information about the MBS service session context expected by the UE.
  • the target cell After the target cell obtains the relevant context information of the MBS session service, it will establish the MBS session context in the target cell according to the relevant context information of the MBS session service. After the target cell establishes the MBS session context, the MBS data transmission can be performed in any of the following ways:
  • the target cell After the target cell establishes the MBS session context, it will configure MBS resources for MBS session service data transmission, and send it to the UE through the RRC connection message; after the UE receives the RRC connection message, it enters the connected state and returns RRC to the target cell.
  • the connection complete message the target cell receives the RRC connection complete message returned by the UE, and transmits MBS data to the UE in the connected state.
  • the target cell After the target cell establishes the MBS session context, it will configure the MBS resources. If the UE wants to enter the deactivation to receive the MBS data, it will send the configured MBS data to the UE through the RRC connection release message or the RRC reject message; the UE receives the MBS data. After the RRC connection release message or the RRC reject message, it enters the deactivated state; the target cell transmits MBS data to the UE in the deactivated state.
  • Step 601 the UE in the In-active state receives some MBS session services in the source cell;
  • Step 602 the UE moves to a new target cell, and determines that the target cell does not have a certain MBS session context that it is interested in, then the UE will initiate an RRC resume process;
  • the UE sends an RRC connection resumption request RRC resume request message to the target cell (or a network entity), and the Resume Cause in the message carries indication information similar to "MBS session establishment".
  • Step 603 the target cell receives the RRC connection recovery request message, parses out the source serving node, and prepares to send the UE context request message to the node, and initiates the UE context request process;
  • the target cell After receiving the above RRC connection recovery request message, the target cell determines the existing MBS session context of the current serving node, and sends a UE context request message to the source cell. ;
  • the target cell can parse out the corresponding source serving node according to the I-RNTI in the RRC connection recovery request message.
  • Step 604 the source cell receives the UE context request message, and returns to the target cell a UE context response message carrying the new MBS session service context related information not stored in the source cell;
  • the source cell After receiving the UE context request message, the source cell determines the existing MBS session service context related information of the target cell, and determines the MBS session service that needs to be established at the new target node in combination with the locally stored MBS context related information of interest to the UE.
  • the returned UE context response message will carry the context-related information of the new MBS session that needs to be established by the target cell, at least including the corresponding QOS profile, multicast address and other information of these MBS sessions;
  • Step 605 the target cell receives the UE context response message returned by the source cell, and starts the establishment of the relevant MBS session context according to the MBS session service related information in the message;
  • the MBS session context may include information such as saving the corresponding QOS profile and multicast address; if necessary, it will be added to the corresponding N3 channel multicast transmission group later.
  • Step 606 for the UE, the target cell decides whether to use MRB transmission or DRB to transmit the corresponding MBS session service, and executes step 607 or step 607a;
  • Step 607 the target cell sends an RRC resume message to the UE, configures corresponding DRB resources or MRBs, and utilizes the configured resources for MBS data transmission;
  • Step 608 after receiving the RRC Resume message, the UE returns an RRC resume complete message to the target cell, and starts to prepare to receive the corresponding MBS session service according to the configuration;
  • Step 607a returning an RRC release or RRC reject message to the UE and carrying the corresponding resource configuration
  • the message explicitly or implicitly indicates "entering the in-active state" to receive the MBS session. If the MRB resource is configured and the UE is expected to continue to receive in the in-active state, the target cell returns RRC release or RRC reject to the UE. message and carry the corresponding resource configuration.
  • Step 608a the UE enters the In-active state, and prepares to receive the corresponding MBS session service according to the corresponding configuration.
  • the content of the UE context request/response message involved in the above process can be changed.
  • the UE context response message returned by the source cell carries all the relevant information about the MBS session context that the UE is interested in, at least Contains information such as the QOS profile and multicast address corresponding to these MBS sessions.
  • the UE context request message sent by the target cell carries the MBS session context list information expected by the UE
  • the UE context response message returned by the source cell carries the relevant information about the MBS service session context expected by the UE.
  • Method 2 The method of MBS data transmission through the public forwarding channel
  • the UE in the In-active state moves to the target cell, and it is determined that the target cell cannot meet the MBS session requirements.
  • the cell obtains the MBS session context related information from the source cell by sending a UE context request message to the source cell; after the target cell establishes the MBS session context, it initiates a public forwarding address request process to the second network side device of the source cell, and sends the message to the source cell.
  • the desired MBS session context list information is indicated to the source cell; the source cell and the target cell establish a common forwarding channel and transmit MBS data, so that the target cell sends the MBS data to the UE.
  • the target cell receives the MBS data sent by the source cell on the common forwarding channel according to the expected MBS session context list information, and sends the MBS data to the UE.
  • the above-mentioned target cell initiates the public forwarding address request process to the source cell, which may be, but is not limited to, the XN-U address indication process associated with the reused UE, or the definition of a new non-UE associated address transmission process.
  • the target cell will trigger the process of requesting a public forwarding address to the source cell, which includes that the current cell does not have it, and the service list information of the MBS session to be established is indicated to the public forwarding channel between the source cell, the MBS that is expected to be established.
  • the session service list information may be per MBS session.
  • the source cell configures MBS resources, starts the forwarding operation of corresponding MBS session data packets on the common forwarding channel, and sends the MBS data to the UE according to the MBS data sent by the expected MBS session context list information.
  • the target cell (or the network entity) is allowed to maintain this channel all the time to transmit MBS service data in this cell.
  • the target cell or the source cell can actively initiate the context release process of the MBS session, the corresponding forwarding channel is also released, and the MBS data is transmitted to the UE in the deactivated state.
  • Mode 3 MBS data transmission through N3 channel
  • the UE in the In-active state moves to the target cell, and determines that the target cell cannot meet the MBS session requirements.
  • the N3 channel through which the UE in the deactivated state transmits the MBS data, sends the MBS data to the target cell through the N3 channel, and the target cell sends the MBS data to the UE in the deactivated state.
  • the N3 channel establishment process is a reused UE-associated path switching process, or a newly defined non-UE-associated MBS session establishment request process.
  • the MBS data sent by the UPF is received through the N3 channel, and the MBS data is sent to the UE.
  • Mode 4 MBS data transmission through public forwarding channel and N3 channel
  • the UE in the In-active state moves to the target cell, and determines that the target cell cannot meet the MBS session requirements.
  • the establishment of the public forwarding channel and the N3 channel can be triggered at the same time, or the establishment of the public forwarding channel can be triggered first, and then the establishment of the N3 channel can be triggered. Not to repeat.
  • a public forwarding channel currently exists, and after receiving an end indication sent from the source cell on the public forwarding channel, the public forwarding channel is released.
  • the specific process is: if the target cell has previously or at the same time initiated a public forwarding address request process to the second network side device, the source cell starts the corresponding MBS session data packet forwarding operation on the public forwarding channel, according to the expected
  • the MBS data sent by the MBS session context list information is sent to the UE.
  • the target cell releases the public forwarding channel established for this MBS session, receives the MBS data sent by the UPF through the N3 channel, and converts the MBS data to the sent to the UE.
  • a method for transmitting MBS service data includes:
  • Step 701 for a deactivated UE that has moved to a target cell, obtain MBS session context related information from the source cell by sending a UE context request message to the source cell;
  • Step 702 After the target cell establishes the MBS session context, perform MBS data transmission.
  • the method further includes:
  • MBS data transmission is performed through the common forwarding channel with the source cell and/or the N3 channel with the core network.
  • perform MBS data transmission including:
  • the target cell After the target cell establishes the MBS session context, configure the MBS resources and send them to the UE through an RRC connection message;
  • perform MBS data transmission including:
  • the target cell After the target cell establishes the MBS session context, configure MBS resources, and send it to the UE through an RRC connection release message or an RRC reject message;
  • MBS data is transmitted to the UE in the deactivated state.
  • obtain MBS session context related information from the source cell including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • the method further includes:
  • the RRC connection recovery request message indicating the establishment of the MBS session context is sent.
  • perform MBS data transmission through a common forwarding channel with the source cell including:
  • a public forwarding address request process is initiated to the source cell, which is the process of indicating the XN-U address associated with the reused UE, or the newly defined non-UE association process.
  • the method further includes:
  • a context release process of the MBS session is initiated to release the common forwarding channel.
  • perform MBS data transmission through the N3 channel with the core network including:
  • N3 channel establishment process is a reused UE-associated path switching process, or a newly defined non-UE-associated MBS session establishment request process
  • the MBS data sent by the UPF is received through the N3 channel, and the MBS data is sent to the UE.
  • the method further includes:
  • An embodiment of the present application also provides a method for transmitting MBS service data of a multimedia broadcast service, which is applied to a network side device of a target cell.
  • the process is shown in FIG. 8 , including:
  • Step 801 receiving a context request message sent by a target cell for a deactivated UE
  • Step 802 Send MBS session context related information to the target cell, so that the target cell establishes an MBS session context and performs MBS data transmission.
  • the method further includes:
  • the relevant information of the MBS session context is obtained from the source cell, and after the target cell establishes the MBS session context, the MBS data is transmitted through the common forwarding channel, so that the target cell can transfer the MBS session context to the target cell. data is sent to the UE.
  • sending MBS session context related information to the target cell including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • establishing a common forwarding channel with the target cell and transmitting MBS data including:
  • MBS data sent to the target cell on the common forwarding channel according to the desired MBS session context list information
  • the common forwarding address request process is a reused UE-associated XN-U address indication process, or a newly defined non-UE association process.
  • the method also includes:
  • a context release process of the MBS session is initiated to release the common forwarding channel.
  • the embodiment of the present application also provides a method for transmitting MBS service data of multimedia broadcasting service, which is applied to core network equipment.
  • the process is shown in FIG. 9 , including:
  • Step 901 establishing an N3 channel with a target cell for transmitting MBS data to a UE in a deactivated state, wherein the target cell completes the establishment of the MBS session context through RRC connection recovery;
  • Step 902 Send MBS data to the target cell through the N3 channel, so that the target cell sends the MBS data to the UE in the deactivated state.
  • establishing an N3 channel with the target cell for transmitting MBS data to the UE in the deactivated state including:
  • N3 channel establishment process is a reused UE-associated path switching process, or a newly defined non-UE-associated MBS session establishment request process
  • the above MBS service data transmission method provided by the embodiment of the present application and the MBS service data transmission solution in the MBS service data transmission system provided by the above embodiment 1 of the present application belong to the same inventive concept.
  • the MBS service data transmission provided by the above embodiment 1 Various implementations of the solution can be applied to the MBS service data transmission method in this embodiment, which will not be repeated here.
  • An embodiment of the present application provides a network side device, which may be a target cell base station, as shown in FIG. 10 , including a processor 1000 , a memory 1001 , a transceiver 1002 , and a bus interface 1003 .
  • the processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1001 may store data used by the processor 1000 when performing operations.
  • the transceiver 1002 is used to receive and transmit data under the control of the processor 1000 .
  • the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by processor 1000 and various circuits of memory represented by memory 1001 linked together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and, therefore, will not be described further herein.
  • the bus interface provides the interface.
  • the processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1001 may store data used by the processor 1000 when performing operations.
  • the processes disclosed in the embodiments of the present application may be applied to the processor 1000 or implemented by the processor 1000 .
  • each step of the signal processing flow can be completed by the hardware integrated logic circuit in the processor 1000 or the instructions in the form of software.
  • the processor 1000 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the embodiments of the present application.
  • a general purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory 1001, and the processor 1000 reads the information in the memory 1001, and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 1000 is configured to read the program in the memory 1001 and execute:
  • the processor is also used for:
  • the processor performs MBS data transmission, including:
  • the target cell After the target cell establishes the MBS session context, configure the MBS resources and send them to the UE through an RRC connection message;
  • the processor performs MBS data transmission, including:
  • the target cell After the target cell establishes the MBS session context, configure MBS resources, and send it to the UE through an RRC connection release message or an RRC reject message;
  • MBS data is transmitted to the UE in the deactivated state.
  • the processor obtains MBS session context related information from the source cell, including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • the processor is also used for:
  • the RRC connection recovery request message indicating the establishment of the MBS session context is sent.
  • the processor performs MBS data transmission through a common forwarding channel with the source cell, including:
  • a public forwarding address request process is initiated to the source cell, which is a process of indicating the XN-U address associated with the reused UE, or a newly defined non-UE association process.
  • the processor is also used for:
  • a context release process of the MBS session is initiated to release the common forwarding channel.
  • the processor performs MBS data transmission through the N3 channel with the core network, including:
  • N3 channel establishment process is a reused UE-associated path switching process, or a newly defined non-UE-associated MBS session establishment request process
  • the MBS data sent by the UPF is received through the N3 channel, and the MBS data is sent to the UE.
  • the processor is also used for:
  • This embodiment of the present application further provides a network side device, which may be a source cell base station.
  • the network side device includes a processor 1100 , a memory 1101 , a transceiver 1102 and a bus interface 1103 .
  • the processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1100 when performing operations.
  • the transceiver 1102 is used to receive and transmit data under the control of the processor 1100 .
  • the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by processor 1100 and various circuits of memory represented by memory 1101 linked together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein.
  • the bus interface provides the interface.
  • the processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1100 when performing operations.
  • the processes disclosed in the embodiments of the present application may be applied to the processor 1100 or implemented by the processor 1100 .
  • each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 1100 or instructions in the form of software.
  • the processor 1100 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the embodiments of the present application.
  • a general purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory 1101, and the processor 1100 reads the information in the memory 1101, and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 1100 is configured to read the program in the memory 1101 and execute:
  • the processor is also used for:
  • the processor sends MBS session context related information to the target cell, including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • the processor establishes a common forwarding channel with the target cell and transmits MBS data, including:
  • MBS data sent to the target cell on the common forwarding channel according to the desired MBS session context list information
  • the common forwarding address request process is a reused UE-associated XN-U address indication process, or a newly defined non-UE association process.
  • the processor is also used for:
  • a context release process of the MBS session is initiated to release the common forwarding channel.
  • the network-side device may be a core network entity device, such as a UPF. As shown in FIG. 12 , the network-side device includes a processor 1200 , a memory 1201 , a transceiver 1202 and a bus interface 1203.
  • a processor 1200 As shown in FIG. 12 , the network-side device includes a processor 1200 , a memory 1201 , a transceiver 1202 and a bus interface 1203.
  • the processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1201 may store data used by the processor 1200 when performing operations.
  • the transceiver 1202 is used to receive and transmit data under the control of the processor 1200 .
  • the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by processor 1200 and various circuits of memory represented by memory 1201 linked together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein.
  • the bus interface provides the interface.
  • the processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1201 may store data used by the processor 1200 when performing operations.
  • the processes disclosed in the embodiments of the present application may be applied to the processor 1200 or implemented by the processor 1200 .
  • each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 1200 or an instruction in the form of software.
  • the processor 1200 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the embodiments of the present application.
  • a general purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • the software module may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory 1201, and the processor 1200 reads the information in the memory 1201, and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 1200 is configured to read the program in the memory 1201 and execute:
  • the MBS data is sent to the target cell through the N3 channel, so that the target cell sends the MBS data to the UE in the deactivated state.
  • the processor and the target cell establish an N3 channel for transmitting MBS data to the deactivated UE, including:
  • N3 channel establishment process is a reused UE-associated path switching process, or a newly defined non-UE-associated MBS session establishment request process
  • An embodiment of the present application further provides a network side device, where the network side device is applied to a target cell, as shown in FIG. 13 , including:
  • the MBS context obtaining module 1301 is configured to send a UE context request message to the source cell for the deactivated UE that has moved to the target cell, and obtain MBS session context related information from the source cell;
  • the MBS data transmission module 1302 is configured to perform MBS data transmission after the target cell establishes the MBS session context
  • the network side device further includes:
  • a channel establishment module used to establish a public forwarding channel with the source cell, and/or establish an N3 channel with the core network
  • the MBS data forwarding module is configured to transmit MBS data through the common forwarding channel and/or the N3 channel.
  • the MBS data transmission module performs MBS data transmission, including:
  • the target cell After the target cell establishes the MBS session context, configure the MBS resources and send them to the UE through an RRC connection message;
  • the MBS data transmission module performs MBS data transmission, including:
  • the target cell After the target cell establishes the MBS session context, configure MBS resources, and send it to the UE through an RRC connection release message or an RRC reject message;
  • MBS data is transmitted to the UE in the deactivated state.
  • the MBS context acquisition module acquires MBS session context related information from the source cell, including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • the MBS context acquisition module is also used to:
  • the RRC connection recovery request message indicating the establishment of the MBS session context is sent.
  • the MBS data forwarding module performs MBS data transmission through a common forwarding channel with the source cell, including:
  • a public forwarding address request process is initiated to the source cell, which is the process of indicating the XN-U address associated with the reused UE, or the newly defined non-UE association process.
  • the channel release module is used for initiating the context release process of the MBS session to release the common forwarding channel.
  • perform MBS data transmission through the N3 channel with the core network including:
  • N3 channel establishment process is a reused UE-associated path switching process, or a newly defined non-UE-associated MBS session establishment request process
  • the MBS data sent by the UPF is received through the N3 channel, and the MBS data is sent to the UE.
  • the channel establishment module is also used for:
  • An embodiment of the present application further provides a network side device, where the network side device is applied to a source cell.
  • the device includes:
  • a request receiving module 1401, configured to receive a context request message sent by the target cell for the deactivated UE
  • the MBS context sending module 1402 is configured to send MBS session context related information to the target cell; so that the target cell establishes an MBS session context and performs MBS data transmission; or
  • a forwarding channel establishment module configured to establish a public forwarding channel with the target cell
  • An MBS transmission module configured to transmit MBS data through the common forwarding channel, so that the target cell sends the MBS data to the UE.
  • the MBS context sending module sends MBS session context related information to the target cell, including:
  • the UE context request message carries the MBS session context list information that exists in the target cell, and the UE context response message carries the new MBS service session context related information that does not exist in the target cell;
  • the UE context response message carries all MBS service session context related information related to the UE.
  • the UE context request message carries the MBS session context list information expected by the UE, and the UE context response message carries the relevant information about the MBS service session context expected by the UE.
  • the MBS transmission module is specifically used for:
  • MBS data sent to the target cell on the common forwarding channel according to the desired MBS session context list information
  • the common forwarding address request process is a reused UE-associated XN-U address indication process, or a newly defined non-UE association process.
  • the forwarding channel release module is used for initiating the context release process of the MBS session to release the common forwarding channel.
  • the embodiment of the present application also provides a network side device, which is applied to a core network entity. As shown in FIG. 15 , the device includes:
  • the N3 channel establishment module 1501 establishes, with the target cell, an N3 channel for transmitting MBS data to the deactivated UE;
  • the MBS data transmission module 1502 is configured to send the MBS data to the target cell through the N3 channel, so that the target cell sends the MBS data to the UE in the deactivated state.
  • the N3 channel establishment module is specifically configured to establish an N3 channel through an N3 channel establishment process triggered by the target cell, where the N3 channel establishment process is a reused UE associated path switching process, or a newly defined non-UE associated MBS session establishment. request process.
  • the above-mentioned network-side device/network-side device provided by the embodiment of the present application and the network-side device in the MBS service data transmission system provided by the above-mentioned Embodiment 1 of the present application belong to the same inventive concept.
  • This implementation manner may be applied to the network-side device/network-side device in this embodiment for implementation, which will not be repeated here.
  • Embodiments of the present application further provide a computer-readable storage medium, including instructions, which, when executed on a computer, cause the computer to execute the MBS service data transmission method provided by the foregoing embodiments.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the modules is only a logical function division. In actual implementation, there may be other division methods.
  • multiple modules or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or modules, and may be in electrical, mechanical or other forms.
  • modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional module in each embodiment of the present application may be integrated into one processing module, or each module may exist physically alone, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may be stored in a computer-readable storage medium.
  • 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 device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.).
  • wire eg, coaxial cable, fiber optic, digital subscriber line (DSL)
  • wireless eg, infrared, wireless, microwave, etc.
  • the computer-readable storage medium may be any available medium that can be stored by a computer, or a data storage device such as a server, data center, etc., which includes one or more available media integrated.
  • the usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVDs), or semiconductor media (eg, solid state disks (SSDs)), and the like.
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

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Abstract

本申请提供一种MBS业务数据传输方法和网络侧装置及设备，该方法包括：对移动到目标小区的去激活态UE，通过向源小区发送上下文请求消息，从源小区获取MBS会话上下文相关信息，并在所述目标小区建立MBS会话上下文后，进行MBS数据传输。本申请提供的方案解决了现有去激活态UE无法保证MBS业务传输连续性的问题。

Description

一种MBS业务数据传输方法和网络侧装置及设备
相关申请的交叉引用
本申请要求在2020年08月14日提交中国专利局、申请号为202010820157.4、申请名称为“一种MBS业务数据传输方法和网络侧装置及设备”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
本申请涉及无线通信技术领域，特别涉及一种MBS业务数据传输方法和网络侧装置及设备。
背景技术
现有4G MBMS(Multimedia Broadcast Multicast Service，多媒体广播组播业务)技术，主要包括三种模式：
1)SC-PTM(Single Cell Point To Multiploint，单小区点到多点)模式
在该模式下，MCE(Multi-cell/multicast Coordination Entity，多小区/多播协调实体)向CN(Core Network，核心网)发送MBMS会话开始请求；CN向MCE发送MBMS会话开始响应；MCE决定对MBMS持有人使用SC-PTM；MCE向eNB(Evolved Node B，演进型基站)发送MBMS会话开始请求；eNB向MCE发送MBMS会话开始响应；eNB触发UE(User Equipment)执行单小区点到多点的业务数据接收。
在上述流程中，感兴趣的UE只需读取SC-MCCH(Single Cell-MBMS Control Channel，单小区多播控制信道)信息，获知SC-MTCH(Single Cell-MBMS l Channel单小区-多播业务信道)的调度信息，即可在空闲Idle态或连接态conntected下接收MBMS业务。
2)单播模式
UE通过PDU(Protocol Data Unit，协议数据单元)会话建立过程，在单播模式下接收MBMS业务。该模式需要UE在连接态下进行会话过程建立，MBMS业务只能通过传统的单播PDU会话建立过程完成MBMS业务的单播传输。
3)MBSFN(Multicast Broadcast Single Frequency Network，多播/组播单频网络)的传输模式
4G网络节点E-UTRAN会判断，某些正在以PTP(Point To Point，点对点模式)方式接收MBMS业务的UE需要转到PTM(Point To Multiploint，点到多点模式)方式进行数据接收，这里的PTM模式，意指MBSFN的传输模式。随后E-UTRAN将发送RRC信令消息通知相应的UE，如果UE决定终止PTP的数据接收后，将再次发送信令消息通知E-UTRAN。最后，UE完成从PTP模式到MBSFN模式的转换。
可见，目前4G MBMS技术只允许UE切换到静态规划好的目标小区，而且只存在连接态和空闲态两种终端的接收需求。5G NR作为新一代无线接入技术网络，同样存在着对于多播/广播业务的需求。而且5G架构下，存在in-active态的UE，为了使这部分UE也能保持MBS(Multimedia Broadcast Service，多媒体广播业务)接收的连续性，需要采用新的增强技术，来扩展当前的MBS业务传输机制。
发明内容
本申请提供了一种MBS业务数据传输方法和网络侧装置及设备，用以解决如何保证去激活态下UE对MBS业务接收连续性的问题。
根据本申请实施例的第一方面，提供一种MBS业务数据传输方法，应用于目标小区网络侧设备，该方法包括：
对移动到目标小区的去激活态UE，通过向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息，并在所述目标小区建立MBS会话上下文后，进行MBS数据传输。
可选地，通过与源小区间的公共前转通道，和/或与核心网间的N3通道，进行MBS数据传输。
可选地，进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接消息发送给所述UE；
接收所述UE返回的RRC连接完成消息，向所述UE传输MBS数据。
可选地，进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接释放消息或RRC拒绝消息发送给所述UE；
向所述去激活态的UE传输MBS数据。
可选地，从源小区获取MBS会话上下文相关信息，包括：
从源小区接收的UE上下文响应消息中，获取MBS会话上下文相关信息；其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，该方法还包括：
接收去激活态UE确定目标小区不能满足MBS会话需求时，发送的指示建立MBS会话上下文的RRC连接恢复请求消息。
可选地，通过与源小区间的公共前转通道，进行MBS数据传输，包括：
向源小区发起公共前转地址请求过程，将期望的MBS会话上下文列表信息指示给源小区；
接收所述源小区在公共前转通道上，根据所述期望的MBS会话上下文列 表信息发送的MBS数据，并将所述MBS数据发送到所述UE。
可选地，向源小区发起公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
可选地，该方法还包括：
发起MBS会话的上下文释放过程，释放所述公共前转通道。
可选地，通过与核心网间的N3通道，进行MBS数据传输，包括：
触发与用户端口实体UPF的N3通道建立过程，所述N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程；
通过所述N3通道接收UPF发送的MBS数据，并将所述MBS数据发送到所述UE。
可选地，该方法还包括：
确定所述N3通过建立后，当前存在公共前转通道，且收到来自源小区在所述公共前转通道上发送的结束指示后，释放所述公共前转通道。
根据本申请实施例的第二方面，一种多媒体广播业务MBS业务数据传输方法，应用于源小区网络侧设备，包括：
接收目标小区针对去激活态UE发送的上下文请求消息；
向所述目标小区发送MBS会话上下文相关信息，以使所述目标小区建立MBS会话上下文并进行MBS数据传输。
可选地，该方法还包括：与所述目标小区建立公共前转通道并传输MBS数据，以使所述目标小区将所述MBS数据发送给UE。
可选地，向所述目标小区发送MBS会话上下文相关信息，包括：
通过向目标小区发送的UE上下文响应消息，将MBS会话上下文相关信息发送给目标小区；其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，与所述目标小区建立公共前转通道并传输MBS数据，包括：
基于目标小区发起的公共前转地址请求过程，确定期望的MBS会话上下文列表信息；
根据所述期望的MBS会话上下文列表信息，在所述公共前转通道上向目标小区发送的MBS数据。
可选地，所述公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
该方法还包括：
发起MBS会话的上下文释放过程，释放所述公共前转通道。
根据本申请实施例的第三方面，提供一种网络侧设备，包括：存储器和处理器；
其中，所述存储器用于存储计算机程序；
所述处理器用于读取所述存储器中的程序并执行：
对移动到目标小区的去激活态UE，向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息，并在所述目标小区建立MBS会话上下文后，进行MBS数据传输。
可选地，所述处理器还用于通过与源小区间的公共前转通道，和/或与核心网间的N3通道，进行MBS数据传输。
可选地，所述处理器进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接消息发送给所述UE；
接收所述UE返回的RRC连接完成消息，向所述UE传输MBS数据。
可选地，所述处理器进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接释放消息或RRC拒绝消息发送给所述UE；
向所述去激活态的UE传输MBS数据。
可选地，所述处理器从源小区获取MBS会话上下文相关信息，包括：
从源小区接收UE上下文响应消息，获取MBS会话上下文相关信息；
其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，所述处理器还用于：
接收去激活态UE确定目标小区不能满足MBS会话需求时，发送的指示建立MBS会话上下文的RRC连接恢复请求消息。
可选地，所述处理器通过与源小区间的公共前转通道，进行MBS数据传输，包括：
向源小区发起公共前转地址请求过程，将期望的MBS会话上下文列表信息指示给源小区；
接收所述源小区在公共前转通道上，根据所述期望的MBS会话上下文列表信息发送的MBS数据，并将所述MBS数据发送到所述UE。
可选地，向源小区发起公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
可选地，所述处理器还用于：
发起MBS会话的上下文释放过程，释放所述公共前转通道。
可选地，所述处理器通过与核心网间的N3通道，进行MBS数据传输， 包括：
触发与用户端口实体UPF的N3通道建立过程，所述N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程；
通过所述N3通道接收UPF发送的MBS数据，并将所述MBS数据发送到所述UE。
可选地，所述处理器还用于：
确定所述N3通过建立后，当前存在公共前转通道，且收到来自源小区在所述公共前转通道上发送的结束指示后，释放所述公共前转通道。
根据本申请实施例的第四方面，提供一种网络侧设备，包括：存储器和处理器；
其中，所述存储器用于存储计算机程序；
所述处理器用于读取所述存储器中的程序并执行：
接收目标小区针对去激活态UE发送的上下文请求消息；向所述目标小区发送MBS会话上下文相关信息，以使所述目标小区建立MBS会话上下文并进行MBS数据传输。
可选地，该处理器还用于：与所述目标小区建立公共前转通道并传输MBS数据，以使所述目标小区将所述MBS数据发送给UE。
可选地，所述处理器向所述目标小区发送MBS会话上下文相关信息，包括：
通过向目标小区发送的UE上下文响应消息，将MBS会话上下文相关信息发送给目标小区；其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，所述处理器与所述目标小区建立公共前转通道并传输MBS数据，包括：
基于目标小区发起的公共前转地址请求过程，确定期望的MBS会话上下文列表信息；
根据所述期望的MBS会话上下文列表信息，在所述公共前转通道上向目标小区发送的MBS数据。
可选地，所述公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
可选地，所述处理器还用于：
发起MBS会话的上下文释放过程，释放所述公共前转通道。
根据本申请实施例的第五方面，提供一种网络侧装置，包括：
MBS上下文获取模块，用于对移动到目标小区的去激活态UE，通过向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息；
MBS数据传输模块，用于在所述目标小区建立MBS会话上下文后，进行MBS数据传输。
可选地，该网络侧装置还包括：
通过建立模块，用于与源小区间建立公共前转通道，和/或与核心网间建立N3通道；
MBS数据转发模块，用于通过所述公共前转通道和/或N3通道，进行MBS数据传输。
可选地，MBS数据传输模块进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接消息发送给所述UE；
接收所述UE返回的RRC连接完成消息，向所述UE传输MBS数据。
可选地，MBS数据传输模块进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接释放消息或RRC拒绝消息发送给所述UE；
向所述去激活态的UE传输MBS数据。
可选地，MBS上下文获取模块从源小区获取MBS会话上下文相关信息，包括：
从源小区接收的UE上下文响应消息中，获取MBS会话上下文相关信息；其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，MBS上下文获取模块还用于：
接收去激活态UE确定目标小区不能满足MBS会话需求时，发送的指示建立MBS会话上下文的RRC连接恢复请求消息。
可选地，MBS数据转发模块通过与源小区间的公共前转通道，进行MBS数据传输，包括：
向源小区发起公共前转地址请求过程，将期望的MBS会话上下文列表信息指示给源小区；
接收所述源小区在公共前转通道上，根据所述期望的MBS会话上下文列表信息发送的MBS数据，并将所述MBS数据发送到所述UE。
可选地，向源小区发起公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
可选地，还包括：
通道释放模块，用于发起MBS会话的上下文释放过程，释放所述公共前 转通道。
可选地，通过与核心网间的N3通道，进行MBS数据传输，包括：
触发与用户端口实体UPF的N3通道建立过程，所述N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程；
通过所述N3通道接收UPF发送的MBS数据，并将所述MBS数据发送到所述UE。
所述通道建立模块还用于：
确定所述N3通过建立后，当前存在公共前转通道，且收到来自源小区在所述公共前转通道上发送的结束指示后，释放所述公共前转通道。
根据本申请实施例的第六方面，提供一种网络侧装置，包括：
请求接收模块，用于接收目标小区针对去激活态UE发送的上下文请求消息；
MBS上下文发送模块，用于向所述目标小区发送MBS会话上下文相关信息；以使所述目标小区建立MBS会话上下文并进行MBS数据传输。
可选地，该网络侧装置还包括：
前转通道建立模块，用于与所述目标小区建立公共前转通道；
MBS传输模块，用于通过所述公共前转通道传输MBS数据，以使所述目标小区将所述MBS数据发送给UE。
可选地，MBS上下文发送模块向所述目标小区发送MBS会话上下文相关信息，包括：
通过向目标小区发送的UE上下文响应消息，将MBS会话上下文相关信息发送给目标小区；其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下 文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，MBS传输模块具体用于：
基于目标小区发起的公共前转地址请求过程，确定期望的MBS会话上下文列表信息；
根据所述期望的MBS会话上下文列表信息，在所述公共前转通道上向目标小区发送的MBS数据。
可选地，所述公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
可选地，还包括：
前转通道释放模块，用于发起MBS会话的上下文释放过程，释放所述公共前转通道。
根据本申请实施例的第七方面，提供一种芯片，所述芯片与设备中的存储器耦合，使得所述芯片在运行时调用所述存储器中存储的程序指令，实现本申请实施例上述各个方面以及各个方面涉及的任一可能涉及的方法。
根据本申请实施例的第八方面，提供一种计算机可读存储介质，该计算机存储介质存储有程序指令，当其在计算机上运行时，使得计算机执行本申请实施例上述各个方面以及各个方面涉及的任一可能涉及的方法。
根据本申请实施例的第九方面，提供一种计算机程序产品，当所述计算机程序产品在电子设备上运行时，使得所述电子设备执行实现本申请实施例上述各个方面以及各个方面涉及的任一可能涉及的方法。
利用本申请提供的MBS业务数据传输方法和网络侧装置及设备，具有以下有益效果：
相比现有的4G MBMS技术，本申请提供的方案允许In-active态下的UE在新的5G RAN目标节点触发新的MBS上下文建立过程传输MBS数据，从而可以动态灵活地确保In-active态下MBS业务传输的连续性。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为SC-PTM模式下的主要MBMS会话数据传输流程图；
图2为一种单播模式接收MBMS业务的流程图；
图3为一种4G MBSFN到单播承载转换的流程图；
图4为本申请实施例中提供的一种MBS业务数据传输系统示意图；
图5为本申请实施例中提供的另一种MBS业务数据传输系统示意图；
图6为本申请实施例中提供的一种通过恢复MBS会话上下文进行MBS数据传输流程图；
图7为本申请实施例中提供的一种通过RRC连接恢复进行MBS业务数据传输方法的流程图；
图8为本申请实施例中提供的一种多媒体广播业务MBS业务数据传输方法流程图；
图9为本申请实施例中提供的另一种多媒体广播业务MBS业务数据传输方法；
图10为本申请实施例中提供的一种作为目标小区基站的网络侧设备的结构示意图；
图11为本申请实施例中提供的一种作为源小区基站的网络侧设备的结构示意图；
图12为本申请实施例中提供的一种作为核心网实体设备的网络侧设备的结构示意图；
图13为本申请实施例中提供的一种应用于目标小区的网络侧设备结构示意图；
图14为本申请实施例中提供的一种应用于源小区的网络侧设备结构示意 图；
图15为本申请实施例中提供的一种应用于核心网实体的网络侧设备结构示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
现有4G MBMS技术，主要包括三种模式：
1)对于SC-PTM模式，如图2所示，主要的MBMS会话数据传输流程为：
步骤1，CN向MCE发送MBMS会话开始请求；
步骤1a，CN向MCE发送MBMS会话开始响应；
步骤2，MCE决定对MBMS持有人使用SC-PTM；
步骤3，MCE向eNB发送MBMS会话开始请求；
步骤3a，eNB向MCE发送MBMS会话开始响应；
步骤4，eNB触发UE执行单小区点到多点。
在此流程中，感兴趣的UE只需读取SC-MCCH信息，获知SC-MTCH的调度信息，即可在Idle态或conntected下接收MBMS业务。
2)单播模式接收MBMS业务的流程，如图1所示，主要包括：
步骤1，UE向AMF发送PDU会话建立请求；
步骤2，AMF向gNB发送PDU会话资源建立请求；
步骤3，gNB向UE发送RRC重配置信息；
步骤4，UE对数据无线承载进行重建；
步骤5，UE向gNB发送RRC重配置完成；
步骤6，gNB向AMF发送PDU会话资源建立响应；
步骤7，gNB、UPF和UE进行上行数据更新。
MBMS业务只能通过传统的单播PDU会话建立过程完成MBMS业务的单播传输。
3)4G MBSFN到单播承载转换的流程，如图3所示，主要包括：
上述流程中，4G网络节点E-UTRAN会判断，某些正在以PTP方式接收MBMS业务的UE需要转到PTM方式进行数据接收，这里的PTM模式，意指MBSFN的传输模式。步骤1，E-UTRAN将发送RRC信令消息通知相应的UE，某PTP方式的MBMS业务转换为PTM方式发送，并发送PTM方式的相关信息；步骤2，UE响应上述消息；步骤3，如果UE决定终止PTP的数据接收后，将再次发送信令消息通知E-UTRAN，具体为UE通知E-UTRAN停止所述MBMS业务的PTP方式发送；步骤4，E-UTRAN响应上述消息。最后，UE完成从PTP模式到MBSFN模式的转换。
现有的4G MBMS技术，只允许UE切换到静态规划好的目标小区，而且只存在连接态和空闲态两种终端的接收需求。这样，在5G NR架构下，势必导致in-active下UE接收MBMS业务的传输受限。
实施例1
基于上述问题，本申请实施例提供一种MBS业务数据传输解决方案，处于In-active态下的UE，当其移动到新的目标小区时，如果此目标小区，没有其感兴趣的MBS业务上下文，允许该UE通过发起RRC resume过程，触发相应MBS上下文在该目标小区的建立，从而目标小区可以基于建立的上下文对UE进行MBS业务传输。
本申请实施例还提供另一种MBS业务数据传输方案，在目标小区建立对应MBS上下文的基础上，目标小区根据不同情况，采用两种方式建立并维护MBS会话的数据传输通道，其中一种方式为目标小区建立与源小区的公共前转通道，另一种方式为目标小区建立与核心网间的N3通道。或者，上述两个通道均建立，之后释放公共前转通道后，维持N3通道进行M3数据传输。
下面就上述两种解决方案的具体实施方式进行详细说明。
如图4所示，本申请实施例提供的MBS业务数据传输系统包括：
第一网络侧设备401，可以为目标小区基站，用于对移动到目标小区的去激活态UE，通过向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息，并在所述目标小区建立MBS会话上下文后，进行MBS数据传输；
第二网络侧设备402，可以为源小区基站，用于基于目标小区在去激活态UE发送的UE上下文请求消息，向所述目标小区发送MBS会话上下文相关信息，以使所述目标小区建立MBS会话上下文并进行MBS数据传输；
用户终端UE400，用于在去激活态从源小区移动到目标小区，并在目标小区进行MBS数据传输。
本实施例中称上述MBS业务数据传输系统解决MBS业务传输的方式为，通过恢复MBS会话上下文进行MBS数据传输的方式。
作为一种可选的实施方式，第一网络侧设备，还用于与所述目标小区建立公共前转通道并传输MBS数据，以使所述目标小区将所述MBS数据发送给UE；
第二网络侧设备还用于与所述目标小区建立公共前转通道并传输MBS数据，以使所述目标小区将所述MBS数据发送给UE。
本实施例中称上述MBS业务数据传输系统解决MBS业务传输的方式为，通过公共前转通道进行MBS数据传输的方式。
作为另一种可选的实施方式，本申请实施例提供的MBS业务数据传输系统中的第一网络侧设备，还用于通过与核心网间的N3通道，进行MBS数据传输；
该系统还包括：第三网络侧设备，用于与目标小区建立向去激活态UE传输MBS数据的N3通道；通过所述N3通道，将MBS数据发送到所述目标小区，以使所述目标小区将所述MBS数据发送到去激活态的UE。
本实施例中称上述MBS业务数据传输系统解决MBS业务传输的方式为， 通过N3通道进行MBS数据传输的方式。
作为另一种可选的实施方式，如图5所示，本申请实施例提供的MBS业务数据传输系统包括：
第一网络侧设备501，可以为目标小区基站，用于对移动到目标小区的去激活态UE，通过向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息，在所述目标小区建立MBS会话上下文后，通过与源小区间的公共前转通道，和与核心网间的N3通道，进行MBS数据传输；
第二网络侧设备502，可以为源小区基站，用于接收目标小区在去激活态UE发送的上下文请求消息；向所述目标小区发送MBS会话上下文相关信息，与所述目标小区建立公共前转通道并传输MBS数据，以使所述目标小区将所述MBS数据发送给UE；
第三网络侧设备503，可以为核心网实体设备，用于与目标小区建立向去激活态UE传输MBS数据的N3通道；通过所述N3通道，将MBS数据发送到所述目标小区，以使所述目标小区将所述MBS数据发送到去激活态的UE；
用户终端UE500，用于在去激活态从源小区移动到目标小区，并在目标小区进行MBS数据传输。
本实施例中称上述MBS业务数据传输系统解决MBS业务传输的方式为，通过公共前转通道和N3通道进行MBS数据传输的方式。
本申请实施例中，用户终端UE具体可以指接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备以及5G网络中的移动台或者未来演进的公共陆地移动网(Public Land Mobile Network，PLMN)网络中的订阅设备等。
第一/第二网络侧设备可为5G系统中的下一代基站(generation Node B， gNB)，可以是全球移动通讯(Global System of Mobile communication，GSM)系统或码分多址(Code Division Multiple Access，CDMA)中的基站(Base Transceiver Station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统中的基站(NodeB，NB)，还可以是长期演进(Long Term Evolution，LTE)系统中的演进型基站(Evolutional Node B，eNB或eNodeB)等。
第三网络侧设备可以为5G系统中的UPF实体。
下面对MBS业务数据传输系统解决MBS业务传输的方式进行详细的说明。
方式一、通过恢复MBS会话上下文进行MBS数据传输的方式
处于In-active态下的UE，当其移动到新的目标小区时，如果此目标小区，没有其感兴趣的MBS业务上下文，允许该UE通过发起RRC resume过程。
作为一种可选的实施方式，In-active态下的UE移动到目标小区，确定目标小区不能满足MBS会话需求，向第一网络侧设备发送RRC连接恢复请求消息，第一网络侧设备接收去激活态UE确定目标小区不能满足MBS会话需求时，发送携带“MBS会话建立”类似的指示信息来指示建立MBS会话上下文的RRC连接恢复请求消息。
所述指示信息RRC resume request消息中的Resume Cause，携带“MBS会话建立”类似的指示信息；或者
所述指示信息RRC resume request消息中携带UE感兴趣的MBS会话业务列表。
第一网络侧设备收到RRC连接恢复请求消息后，根据指示确定需要在目标小区建立MBS会话上下文，第一网络侧设备将向源小区的第二网络测设备发起MBS上下文恢复过程，通过此过程，获取期望建立的MBS会话业务上下文相关信息。具体地，向源小区发送UE上下文请求消息，通过UE上下文请求消息指示源小区需要返回相应的MBS会话业务上下文相关信息，接收所述源小区返回的UE上下文响应消息，该UE上下文响应消息中携带MBS会 话业务上下文相关信息。
作为一种可选的实施方式，源小区发送的所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，目标小区收到该UE上下文请求消息后，确定源小区存在的MBS会话业务，根据自身保存的已有的MBS会话业务上下文相关信息，确定哪些是源小区没有的MBS业务，从而将新的MBS业务会话上下文信息发送给源小区，即向源小区发送的UE上下文请求消息中携带目标小区不存在的新的MBS业务会话上下文相关信息。
作为另一种可选的实施方式，源小区向目标小区发送的UE上下文请求消息不携带任何MBS业务会话相关信息，但是会指示目标小区需要返回MBS业务会话上下文信息，具体的指示方式可以显式或隐式的指示。目标小区收到UE上下文请求消息后，将本地存储的所有MBS业务会话上下文相关信息进行反馈，即目标小区返回的所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；
作为另一种可选的实施方式，源小区发送的UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，目标小区收到UE上下文请求消息后，在本地查询UE期望的MBS业务会话上下文相关信息，并发送到源小区，即目标小区向源小区发送的所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
目标小区获取MBS会话业务相关上下文信息后，会根据MBS会话业务相关上下文信息在目标小区建立MBS会话上下文，在目标小区建立MBS会话上下文后，可以通过如下任一方式进行MBS数据传输：
1)、在连接态进行MBS数据传输
目标小区在建立MBS会话上下文后，会配置MBS资源以进行MBS会话业务数据传输，并通过RRC连接消息发送给所述UE；UE收到RRC连接消息后，进入连接态，并向目标小区返回RRC连接完成消息，目标小区接收所述UE返回的RRC连接完成消息，在连接态向所述UE传输MBS数据。
2)、在去激活态进行MBS数据传输
目标小区在建立MBS会话上下文后，会配置MBS资源，如果想让UE进入去激活接收MBS数据，则通过RRC连接释放消息或RRC拒绝消息，将配置的MBS数据发送给所述UE；UE收到RRC连接释放消息或RRC拒绝消息后，进入去激活态；目标小区向所述去激活态的UE传输MBS数据。
下面结合流程图给出通过恢复MBS会话上下文进行MBS数据传输的方式的详细流程，如图6所示，主要包括以下步骤：
步骤601，处于In-active态下的UE在源小区接收某些MBS会话业务；
步骤602，UE移动到新的目标小区，确定此目标小区没有自身感兴趣的某MBS会话上下文存在，则该UE将发起RRC resume过程；
具体地，UE向目标小区(或是网络实体)发送RRC连接恢复请求RRC resume request消息，消息中的Resume Cause，携带“MBS会话建立”类似的指示信息。
步骤603，目标小区接收RRC连接恢复请求消息，解析出源服务节点，并准备向该节点发送UE上下文请求消息，发起UE上下文请求过程；
目标小区收到上述RRC连接恢复请求消息后，确定当前服务节点已经存在的MBS会话上下文，并向源小区发送UE上下文请求消息，该消息允许携带当前目标服务节点已经存在的MBS会话上下业务列表信息；
目标小区可以根据RRC连接恢复请求消息中的I-RNTI解析出对应的源服务节点。
步骤604，源小区接收UE上下文请求消息，向目标小区返回携带新的未保存在源小区的MBS会话业务上下文相关信息的UE上下文响应消息；
源小区收到上述UE上下文请求消息后，确定目标小区已经存在的MBS会话业务上下文相关信息，结合本地保存的该UE感兴趣MBS上下文相关信息，确定需要在新的目标节点建立的MBS会话业务。相应地，将在返回的UE上下文响应消息中，携带需要目标小区建立的新的MBS会话上下文相关信息，至少包含这些MBS会话对应的QOS profile，多播地址等信息；
步骤605，目标小区接收源小区返回的UE上下文响应消息，根据消息中 的MBS会话业务相关信息，开始相关MBS会话上下文的建立；
MBS会话上下文具体可以包括保存相应的QOS profile，以及多播地址等信息；如果需要的话，后续将加入相应的N3通道多播传输组中。
步骤606，目标小区针对此UE，决定是否采用MRB传输或是DRB传输相应的MBS会话业务，执行步骤607或步骤607a；
步骤607，目标小区向UE发送RRC resume消息，配置相应的DRB资源或是MRB，并利用配置的资源进行MBS数据传输；
步骤608，UE收到RRC Resume消息后，向目标小区返回RRC resume complete消息，并开始按照配置准备接收相应的MBS会话业务；
步骤607a，向UE返回RRC release或RRC reject消息并携带对应的资源配置；
消息中显式或隐式地指明“进入in-active态”接收MBS会话，如果配置的是MRB资源，并期望UE继续保持在in-active态接收，则目标小区向UE返回RRC release或RRC reject消息并携带对应的资源配置。
步骤608a，UE进入In-active态，按照相应的配置准备接收相应的MBS会话业务。
需要说明的是，具体实施时可以对上述流程中涉及的UE上下文请求/响应消息中内容作出改动，如源小区返回的UE上下文响应消息中，携带所有UE感兴趣的MBS会话上下文相关信息，至少包含这些MBS会话对应的QOS profile，多播地址等信息。或者目标小区发送的UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，源小区返回所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。其他流程同上，具体的过程这里不再重述。
方式二、通过公共前转通道进行MBS数据传输的方式
处于In-active态下的UE，当其移动到新的目标小区时，作为一种可选的实施方式，In-active态下的UE移动到目标小区，确定目标小区不能满足MBS会话需求，目标小区通过向源小区发送UE上下文请求消息，从源小区获取 MBS会话上下文相关信息；在所述目标小区建立MBS会话上下文后，通过向源小区第二网络侧设备发起公共前转地址请求过程，将期望的MBS会话上下文列表信息指示给源小区；源小区与所述目标小区建立公共前转通道并传输MBS数据，以使所述目标小区将所述MBS数据发送给UE。具体地，目标小区接收所述源小区在公共前转通道上，根据所述期望的MBS会话上下文列表信息发送的MBS数据，并将所述MBS数据发送到所述UE。
上述目标小区向源小区发起公共前转地址请求过程，可以但不限于为重用的UE associated的XN-U地址指示过程，或是定义新的非UE associated地址传输过程。
可选地，目标小区将触发向源小区的公共前转地址请求过程，其中包含本小区没有，且期望建立的MBS会话业务列表信息指示给源小区间的公共前转通道，该期望建立的MBS会话业务列表信息可以是per MBS会话的。接着源小区配置MBS资源，在公共前转通道开启相应的MBS会话数据包的前转操作，根据所述期望的MBS会话上下文列表信息发送的MBS数据，将所述MBS数据发送到所述UE。
之后，允许目标小区(或是网络实体)，一直维持此通道，来进行MBS业务数据在本小区的传输。任何时候，目标小区或源小区可以在任何时候主动发起MBS会话的上下文释放过程，相应的前转通道也被释放，向所述去激活态的UE传输MBS数据。
方式三、通过N3通道进行MBS数据传输的方式
处于In-active态下的UE，当其移动到新的目标小区时，作为一种可选的实施方式，In-active态下的UE移动到目标小区，确定目标小区不能满足MBS会话需求，通过向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息；在所述目标小区建立MBS会话上下文后，触发与第二网络侧设备的N3通道建立过程，源小区与目标小区建立向去激活态UE传输MBS数据的N3通道，通过所述N3通道，将MBS数据发送到所述目标小区，目标小区将所述MBS数据发送到去激活态的UE。
作为一种可选的实施方式，N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程。通过N3通道接收UPF发送的MBS数据，并将所述MBS数据发送到所述UE。
方式四、通过公共前转通道和N3通道进行MBS数据传输的方式
处于In-active态下的UE，当其移动到新的目标小区时，作为一种可选的实施方式，In-active态下的UE移动到目标小区，确定目标小区不能满足MBS会话需求，通过向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息；在所述目标小区建立MBS会话上下文后，触发向源小区第二网络侧设备发起公共前转地址请求过程，及与第三网络侧设备的N3通道建立过程。
可以同时触发建立公共前转通道和N3通道，或者先触发建立公共前转通道，再触发建立N3通道，建立公共前转通道和N3通道并传输MBS数据的详细过程参见上述实施方式的描述，这里不再重述。
需要说明的是，确定所述N3通过建立后，当前存在公共前转通道，且收到来自源小区在所述公共前转通道上发送的结束指示后，释放所述公共前转通道。具体过程为：如果目标小区先前或同时已经向第二网络侧设备发起公共前转地址请求过程，则源小区在公共前转通道开启相应的MBS会话数据包的前转操作，根据所述期望的MBS会话上下文列表信息发送的MBS数据，将所述MBS数据发送到所述UE。随后，目标小区接收到来自源小区前转通道上的end marker指示后，再释放针对此MBS会话建立的公共前转通道，通过所述N3通道接收UPF发送的MBS数据，并将所述MBS数据发送到所述UE。
本申请实施例描述的系统架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着系统架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
实施例2
参照图7，为本申请实施例提供的一种MBS业务数据传输方法，该方法包括：
步骤701，对移动到目标小区的去激活态UE，通过向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息；
步骤702，在所述目标小区建立MBS会话上下文后，进行MBS数据传输。
可选地，该方法还包括：
建立与源小区间的公共前转通道，和/或与核心网间的N3通道；
通过与源小区间的公共前转通道，和/或与核心网间的N3通道，进行MBS数据传输。
可选地，进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接消息发送给所述UE；
接收所述UE返回的RRC连接完成消息，向所述UE传输MBS数据。
可选地，进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接释放消息或RRC拒绝消息发送给所述UE；
向所述去激活态的UE传输MBS数据。
可选地，从源小区获取MBS会话上下文相关信息，包括：
从源小区接收的UE上下文响应消息中，获取MBS会话上下文相关信息；其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，该方法还包括：
接收去激活态UE确定目标小区不能满足MBS会话需求时，发送的指示建立MBS会话上下文的RRC连接恢复请求消息。
可选地，通过与源小区间的公共前转通道，进行MBS数据传输，包括：
向源小区发起公共前转地址请求过程，将期望的MBS会话上下文列表信息指示给源小区；
接收所述源小区在公共前转通道上，根据所述期望的MBS会话上下文列表信息发送的MBS数据，并将所述MBS数据发送到所述UE。
可选地，向源小区发起公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
可选地，该方法还包括：
发起MBS会话的上下文释放过程，释放所述公共前转通道。
可选地，通过与核心网间的N3通道，进行MBS数据传输，包括：
触发与用户端口实体UPF的N3通道建立过程，所述N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程；
通过所述N3通道接收UPF发送的MBS数据，并将所述MBS数据发送到所述UE。
可选地，该方法还包括：
确定所述N3通过建立后，当前存在公共前转通道，且收到来自源小区在所述公共前转通道上发送的结束指示后，释放所述公共前转通道。
本申请实施例还提供一种多媒体广播业务MBS业务数据传输方法，应用于目标小区网络侧设备，过程如图8所示，包括：
步骤801，接收目标小区针对去激活态UE发送的上下文请求消息；
步骤802，向所述目标小区发送MBS会话上下文相关信息，以使所述目 标小区建立MBS会话上下文并进行MBS数据传输。
可选地，该方法还包括：
通过向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息，在所述目标小区建立MBS会话上下文后，通过公共前转通道传输MBS数据，以使所述目标小区将所述MBS数据发送给UE。
可选地，向所述目标小区发送MBS会话上下文相关信息，包括：
通过向目标小区发送的UE上下文响应消息，将MBS会话上下文相关信息发送给目标小区；其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，与所述目标小区建立公共前转通道并传输MBS数据，包括：
基于目标小区发起的公共前转地址请求过程，确定期望的MBS会话上下文列表信息；
根据所述期望的MBS会话上下文列表信息，在所述公共前转通道上向目标小区发送的MBS数据。
可选地，所述公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
该方法还包括：
发起MBS会话的上下文释放过程，释放所述公共前转通道。
本申请实施例还提供一种多媒体广播业务MBS业务数据传输方法，应用于核心网设备，过程如图9所示，包括：
步骤901，与目标小区建立向去激活态UE传输MBS数据的N3通道， 其中所述目标小区通过RRC连接恢复完成MBS会话上下文的建立；
步骤902，通过所述N3通道，将MBS数据发送到所述目标小区，以使所述目标小区将所述MBS数据发送到去激活态的UE。
可选地，与目标小区建立向去激活态UE传输MBS数据的N3通道，包括：
通过目标小区触发的N3通道建立过程建立N3通道，所述N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程；
通过所述N3通道向目标小区发送MBS数据。
本申请实施例所提供的上述MBS业务数据传输方法与本申请上述实施例1提供的MBS业务数据传输系统中的MBS业务数据传输解决方案属于同一发明构思，上述实施例1提供的MBS业务数据传输解决方案的各种实施方式，可以应用到本实施例中的MBS业务数据传输方法，这里不再重述。
实施例3
本申请实施例提供一种网络侧设备，该网络侧设备可以为目标小区基站，如图10所示，包括处理器1000、存储器1001、收发机1002以及总线接口1003。
处理器1000负责管理总线架构和通常的处理，存储器1001可以存储处理器1000在执行操作时所使用的数据。收发机1002用于在处理器1000的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器1000代表的一个或多个处理器和存储器1001代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其它电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器1000负责管理总线架构和通常的处理，存储器1001可以存储处理器1000在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器1000中，或者由处理器1000实现。在实现过程中，信号处理流程的各步骤可以通过处理器1000中的硬件 的集成逻辑电路或者软件形式的指令完成。处理器1000可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其它可编程逻辑器件、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实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。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1001，处理器1000读取存储器1001中的信息，结合其硬件完成信号处理流程的步骤。
具体地，处理器1000，用于读取存储器1001中的程序并执行：
对移动到目标小区的去激活态UE，向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息，并在所述目标小区建立MBS会话上下文后，进行MBS数据传输；
可选地，所述处理器还用于：
建立与源小区间的公共前转通道，和/或与核心网间的N3通道，进行MBS数据传输。
可选地，所述处理器进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接消息发送给所述UE；
接收所述UE返回的RRC连接完成消息，向所述UE传输MBS数据。
可选地，所述处理器进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接释放消息或RRC拒绝消息发送给所述UE；
向所述去激活态的UE传输MBS数据。
可选地，所述处理器从源小区获取MBS会话上下文相关信息，包括：
从源小区接收的UE上下文响应消息中，获取MBS会话上下文相关信息； 其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，所述处理器还用于：
接收去激活态UE确定目标小区不能满足MBS会话需求时，发送的指示建立MBS会话上下文的RRC连接恢复请求消息。
可选地，所述处理器通过与源小区间的公共前转通道，进行MBS数据传输，包括：
向源小区发起公共前转地址请求过程，将期望的MBS会话上下文列表信息指示给源小区；
接收所述源小区在公共前转通道上，根据所述期望的MBS会话上下文列表信息发送的MBS数据，并将所述MBS数据发送到所述UE。
可选地，向源小区发起公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
可选地，所述处理器还用于：
发起MBS会话的上下文释放过程，释放所述公共前转通道。
可选地，所述处理器通过与核心网间的N3通道，进行MBS数据传输，包括：
触发与用户端口实体UPF的N3通道建立过程，所述N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程；
通过所述N3通道接收UPF发送的MBS数据，并将所述MBS数据发送 到所述UE。
可选地，所述处理器还用于：
确定所述N3通过建立后，当前存在公共前转通道，且收到来自源小区在所述公共前转通道上发送的结束指示后，释放所述公共前转通道。
本申请实施例还提供一种网络侧设备，该网络侧设备可以为源小区基站，如图11所示，该网络侧设备包括处理器1100、存储器1101、收发机1102以及总线接口1103。
处理器1100负责管理总线架构和通常的处理，存储器1101可以存储处理器1100在执行操作时所使用的数据。收发机1102用于在处理器1100的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器1100代表的一个或多个处理器和存储器1101代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其它电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器1100负责管理总线架构和通常的处理，存储器1101可以存储处理器1100在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器1100中，或者由处理器1100实现。在实现过程中，信号处理流程的各步骤可以通过处理器1100中的硬件的集成逻辑电路或者软件形式的指令完成。处理器1100可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其它可编程逻辑器件、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实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。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1101，处理器1100读取存储器1101中的信息，结合其硬件完成信 号处理流程的步骤。
具体地，处理器1100，用于读取存储器1101中的程序并执行：
接收目标小区针对去激活态UE发送的上下文请求消息；
向所述目标小区发送MBS会话上下文相关信息，以使所述目标小区建立MBS会话上下文并进行MBS数据传输；
可选地，所述处理器还用于：
与所述目标小区建立公共前转通道并传输MBS数据，以使所述目标小区将所述MBS数据发送给UE。
可选地，所述处理器向所述目标小区发送MBS会话上下文相关信息，包括：
通过向目标小区发送的UE上下文响应消息，将MBS会话上下文相关信息发送给目标小区；其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，所述处理器与所述目标小区建立公共前转通道并传输MBS数据，包括：
基于目标小区发起的公共前转地址请求过程，确定期望的MBS会话上下文列表信息；
根据所述期望的MBS会话上下文列表信息，在所述公共前转通道上向目标小区发送的MBS数据。
可选地，所述公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
可选地，所述处理器还用于：
发起MBS会话的上下文释放过程，释放所述公共前转通道。
本申请实施例还提供一种网络侧设备，该网络侧设备可以为核心网实体设备，如UPF，如图12所示，该网络侧设备包括处理器1200、存储器1201、收发机1202以及总线接口1203。
处理器1200负责管理总线架构和通常的处理，存储器1201可以存储处理器1200在执行操作时所使用的数据。收发机1202用于在处理器1200的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器1200代表的一个或多个处理器和存储器1201代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其它电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器1200负责管理总线架构和通常的处理，存储器1201可以存储处理器1200在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器1200中，或者由处理器1200实现。在实现过程中，信号处理流程的各步骤可以通过处理器1200中的硬件的集成逻辑电路或者软件形式的指令完成。处理器1200可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其它可编程逻辑器件、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实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。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1201，处理器1200读取存储器1201中的信息，结合其硬件完成信号处理流程的步骤。
具体地，处理器1200，用于读取存储器1201中的程序并执行：
与目标小区建立向去激活态UE传输MBS数据的N3通道；
通过所述N3通道，将MBS数据发送到所述目标小区，以使所述目标小区将所述MBS数据发送到去激活态的UE。
可选地，所述处理器与目标小区建立向去激活态UE传输MBS数据的N3通道，包括：
通过目标小区触发的N3通道建立过程建立N3通道，所述N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程；
通过所述N3通道向目标小区发送MBS数据。
本申请实施例还提供一种网络侧装置，该网络侧装置应用于目标小区，如图13所示，包括：
MBS上下文获取模块1301，用于对移动到目标小区的去激活态UE，向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息；
MBS数据传输模块1302，用于在所述目标小区建立MBS会话上下文后，进行MBS数据传输；
可选地，该网络侧装置还包括：
通道建立模块，用于建立与源小区间的公共前转通道，和/或与核心网间建立N3通道；
MBS数据转发模块，用于通过所述公共前转通道和/或N3通道，进行MBS数据传输。
可选地，MBS数据传输模块进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接消息发送给所述UE；
接收所述UE返回的RRC连接完成消息，向所述UE传输MBS数据。
可选地，MBS数据传输模块进行MBS数据传输，包括：
在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接释放消息或RRC拒绝消息发送给所述UE；
向所述去激活态的UE传输MBS数据。
可选地，MBS上下文获取模块通过从源小区获取MBS会话上下文相关信息，包括：
从源小区接收的UE上下文响应消息中，获取MBS会话上下文相关信息；其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，MBS上下文获取模块还用于：
接收去激活态UE确定目标小区不能满足MBS会话需求时，发送的指示建立MBS会话上下文的RRC连接恢复请求消息。
可选地，MBS数据转发模块通过与源小区间的公共前转通道，进行MBS数据传输，包括：
向源小区发起公共前转地址请求过程，将期望的MBS会话上下文列表信息指示给源小区；
接收所述源小区在公共前转通道上，根据所述期望的MBS会话上下文列表信息发送的MBS数据，并将所述MBS数据发送到所述UE。
可选地，向源小区发起公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
可选地，还包括：
通道释放模块，用于发起MBS会话的上下文释放过程，释放所述公共前转通道。
可选地，通过与核心网间的N3通道，进行MBS数据传输，包括：
触发与用户端口实体UPF的N3通道建立过程，所述N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程；
通过所述N3通道接收UPF发送的MBS数据，并将所述MBS数据发送到所述UE。
所述通道建立模块还用于：
确定所述N3通过建立后，当前存在公共前转通道，且收到来自源小区在所述公共前转通道上发送的结束指示后，释放所述公共前转通道。
本申请实施例还提供一种网络侧装置，该网络侧装置应用于源小区，如图14所示，该装置包括：
请求接收模块1401，用于接收目标小区针对去激活态UE发送的上下文请求消息；
MBS上下文发送模块1402，用于向所述目标小区发送MBS会话上下文相关信息；以使所述目标小区建立MBS会话上下文并进行MBS数据传输；或者
前转通道建立模块，用于与所述目标小区建立公共前转通道；
MBS传输模块，用于通过所述公共前转通道传输MBS数据，以使所述目标小区将所述MBS数据发送给UE。
可选地，MBS上下文发送模块向所述目标小区发送MBS会话上下文相关信息，包括：
通过向目标小区发送的UE上下文响应消息，将MBS会话上下文相关信息发送给目标小区；其中：
所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
可选地，MBS传输模块具体用于：
基于目标小区发起的公共前转地址请求过程，确定期望的MBS会话上下文列表信息；
根据所述期望的MBS会话上下文列表信息，在所述公共前转通道上向目标小区发送的MBS数据。
可选地，所述公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
可选地，还包括：
前转通道释放模块，用于发起MBS会话的上下文释放过程，释放所述公共前转通道。
本申请实施例还提供一种网络侧装置，应用于核心网实体，如图15所示，该装置包括：
N3通道建立模块1501，与目标小区建立向去激活态UE传输MBS数据的N3通道；
MBS数据传输模块1502，用于通过所述N3通道，将MBS数据发送到所述目标小区，以使所述目标小区将所述MBS数据发送到去激活态的UE。
可选地，N3通道建立模块具体用于通过目标小区触发的N3通道建立过程建立N3通道，所述N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程。
本申请实施例所提供的上述网络侧设备/网络侧装置与本申请上述实施例1提供的MBS业务数据传输系统中的网络侧设备属于同一发明构思，上述实施例1提供的网络侧设备的各种实施方式，可以应用到本实施例中的网络侧设备/网络侧装置进行实施，这里不再重述。
本申请实施例还提供一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行上述实施例提供的MBS业务数据传输方法。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的装置和模块的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述模块的划分，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，例如多个模块或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或模块的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的模块可以是或者也可以不是物理上分开的，作为模块显示的部件可以是或者也可以不是物理模块，即可以位于一个地方，或者也可以分布到多个网络模块上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能模块可以集成在一个处理模块中，也可以是各个模块单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。所述集成的模块如果以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。
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实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其它可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一计算机可读存储介质传输，例如，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(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储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，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。
以上对本申请所提供的技术方案进行了详细介绍，本申请中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其它可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其它可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其它可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或 多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其它可编程数据处理设备上，使得在计算机或其它可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其它可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (35)

  1. 一种多媒体广播业务MBS业务数据传输方法，应用于目标小区网络侧设备，其特征在于，包括：
    对移动到目标小区的去激活态UE，向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息；
    在所述目标小区建立MBS会话上下文后，进行MBS数据传输。
  2. 根据权利要求1所述的方法，其特征在于，还包括：
    通过与源小区间的公共前转通道，和/或与核心网间的N3通道，进行MBS数据传输。
  3. 根据权利要求1所述的方法，其特征在于，进行MBS数据传输，包括：
    在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接消息发送给所述UE；
    接收所述UE返回的RRC连接完成消息，向所述UE传输MBS数据；
    或者
    在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接释放消息或RRC拒绝消息发送给所述UE；
    向所述去激活态的UE传输MBS数据。
  4. 根据权利要求1～3任一所述的方法，其特征在于，从源小区获取MBS会话上下文相关信息，包括：
    从源小区接收的UE上下文响应消息中，获取MBS会话上下文相关信息；其中：
    所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
    所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下 文相关信息；或者
    所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
  5. 根据权利要求1所述的方法，其特征在于，还包括：
    接收去激活态UE确定目标小区不能满足MBS会话需求时，发送的指示建立MBS会话上下文的RRC连接恢复请求消息。
  6. 根据权利要求2所述的方法，其特征在于，通过与源小区间的公共前转通道，进行MBS数据传输，包括：
    向源小区发起公共前转地址请求过程，将期望的MBS会话上下文列表信息指示给源小区；
    接收所述源小区在公共前转通道上，根据所述期望的MBS会话上下文列表信息发送的MBS数据，并将所述MBS数据发送到所述UE。
  7. 根据权利要求6所述的方法，其特征在于，向源小区发起公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
  8. 根据权利要求6所述的方法，其特征在于，还包括：
    发起MBS会话的上下文释放过程，释放所述公共前转通道。
  9. 根据权利要求2所述的方法，其特征在于，通过与核心网间的N3通道，进行MBS数据传输，包括：
    触发与用户端口实体UPF的N3通道建立过程，所述N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程；
    通过所述N3通道接收UPF发送的MBS数据，并将所述MBS数据发送到所述UE。
  10. 根据权利要求9所述的方法，其特征在于，还包括：
    确定所述N3通过建立后，当前存在公共前转通道，且收到来自源小区在所述公共前转通道上发送的结束指示后，释放所述公共前转通道。
  11. 一种多媒体广播业务MBS业务数据传输方法，应用于源小区网络侧设备，其特征在于，包括：
    接收目标小区针对去激活态UE发送的上下文请求消息；
    向所述目标小区发送MBS会话上下文相关信息，以使所述目标小区建立MBS会话上下文并进行MBS数据传输。
  12. 根据权利要求11所述的方法，其特征在于，还包括：
    与所述目标小区建立公共前转通道并传输MBS数据，以使所述目标小区将所述MBS数据发送给UE。
  13. 根据权利要求11所述的方法，其特征在于，向所述目标小区发送MBS会话上下文相关信息，包括：
    通过向目标小区发送的UE上下文响应消息，将MBS会话上下文相关信息发送给目标小区；其中：
    所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
    所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
    所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
  14. 根据权利要求12所述的方法，其特征在于，与所述目标小区建立公共前转通道并传输MBS数据，包括：
    基于目标小区发起的公共前转地址请求过程，确定期望的MBS会话上下文列表信息；
    根据所述期望的MBS会话上下文列表信息，在所述公共前转通道上向目标小区发送的MBS数据。
  15. 根据权利要求14所述的方法，其特征在于，所述公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过 程。
  16. 根据权利要求12所述的方法，其特征在于，还包括：
    发起MBS会话的上下文释放过程，释放所述公共前转通道。
  17. 一种网络侧设备，其特征在于，包括：存储器和处理器；
    其中，所述存储器用于存储计算机程序；
    所述处理器用于读取所述存储器中的程序并执行：
    对移动到目标小区的去激活态UE，向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息，并在所述目标小区建立MBS会话上下文后，进行MBS数据传输。
  18. 根据权利要求17所述的网络侧设备，其特征在于，所述处理器还用于：
    通过与源小区间的公共前转通道，和/或与核心网间的N3通道，进行MBS数据传输。
  19. 根据权利要求17所述的网络侧设备，其特征在于，所述处理器进行MBS数据传输，包括：
    在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接消息发送给所述UE；
    接收所述UE返回的RRC连接完成消息，向所述UE传输MBS数据；
    或者，所述处理器进行MBS数据传输，包括：
    在目标小区建立MBS会话上下文后，配置MBS资源，并通过RRC连接释放消息或RRC拒绝消息发送给所述UE；
    向所述去激活态的UE传输MBS数据。
  20. 根据权利要求17～19任一所述的网络侧设备，其特征在于，所述处理器从源小区获取MBS会话上下文相关信息，包括：
    从源小区接收UE上下文响应消息，获取MBS会话上下文相关信息；
    其中：
    所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息， 所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
    所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
    所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
  21. 根据权利要求17所述的网络侧设备，其特征在于，所述处理器还用于：
    接收去激活态UE确定目标小区不能满足MBS会话需求时，发送的指示建立MBS会话上下文的RRC连接恢复请求消息。
  22. 根据权利要求18所述的网络侧设备，其特征在于，所述处理器通过与源小区间的公共前转通道，进行MBS数据传输，包括：
    向源小区发起公共前转地址请求过程，将期望的MBS会话上下文列表信息指示给源小区；
    接收所述源小区在公共前转通道上，根据所述期望的MBS会话上下文列表信息发送的MBS数据，并将所述MBS数据发送到所述UE。
  23. 根据权利要求22所述的网络侧设备，其特征在于，向源小区发起公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
  24. 根据权利要求18所述的网络侧设备，其特征在于，所述处理器还用于：
    发起MBS会话的上下文释放过程，释放所述公共前转通道。
  25. 根据权利要求18所述的网络侧设备，其特征在于，所述处理器通过与核心网间的N3通道，进行MBS数据传输，包括：
    触发与用户端口实体UPF的N3通道建立过程，所述N3通道建立过程为重用的UE关联路径切换过程，或者为新定义的非UE关联MBS会话建立请求过程；
    通过所述N3通道接收UPF发送的MBS数据，并将所述MBS数据发送到所述UE。
  26. 根据权利要求25所述的网络侧设备，其特征在于，所述处理器还用于：
    确定所述N3通过建立后，当前存在公共前转通道，且收到来自源小区在所述公共前转通道上发送的结束指示后，释放所述公共前转通道。
  27. 一种网络侧设备，其特征在于，包括：存储器和处理器；
    其中，所述存储器用于存储计算机程序；
    所述处理器用于读取所述存储器中的程序并执行：
    接收目标小区针对去激活态UE发送的上下文请求消息；向所述目标小区发送MBS会话上下文相关信息，以使所述目标小区建立MBS会话上下文并进行MBS数据传输。
  28. 根据权利要求27所述的网络侧设备，其特征在于，所述处理器还用于：
    与所述目标小区建立公共前转通道并传输MBS数据，以使所述目标小区将所述MBS数据发送给UE。
  29. 根据权利要求27所述的网络侧设备，其特征在于，所述处理器向所述目标小区发送MBS会话上下文相关信息，包括：
    通过向目标小区发送的UE上下文响应消息，将MBS会话上下文相关信息发送给目标小区；其中：
    所述UE上下文请求消息携带目标小区存在的MBS会话上下文列表信息，所述UE上下文响应消息携带目标小区不存在的新的MBS业务会话上下文相关信息；或者
    所述UE上下文响应消息携带与所述UE相关的所有MBS业务会话上下文相关信息；或者
    所述UE上下文请求消息携带所述UE期望的MBS会话上下文列表信息，所述UE上下文响应消息携带所述UE期望的MBS业务会话上下文相关信息。
  30. 根据权利要求28所述的网络侧设备，其特征在于，所述处理器与所述目标小区建立公共前转通道并传输MBS数据，包括：
    基于目标小区发起的公共前转地址请求过程，确定期望的MBS会话上下文列表信息；
    根据所述期望的MBS会话上下文列表信息，在所述公共前转通道上向目标小区发送的MBS数据。
  31. 根据权利要求30所述的网络侧设备，其特征在于，所述公共前转地址请求过程，为重用的UE关联的XN-U地址指示过程，或新定义的非UE关联过程。
  32. 根据权利要求28所述的网络侧设备，其特征在于，所述处理器还用于：
    发起MBS会话的上下文释放过程，释放所述公共前转通道。
  33. 一种网络侧装置，其特征在于，包括：
    MBS上下文获取模块，用于对移动到目标小区的去激活态UE，通过向源小区发送UE上下文请求消息，从源小区获取MBS会话上下文相关信息；
    MBS数据传输模块，用于在所述目标小区建立MBS会话上下文后，进行MBS数据传输。
  34. 一种网络侧装置，其特征在于，包括：
    请求接收模块，用于接收目标小区针对去激活态UE发送的上下文请求消息；
    MBS上下文发送模块，用于向所述目标小区发送MBS会话上下文相关信息；以使所述目标小区建立MBS会话上下文并进行MBS数据传输。
  35. 一种计算机程序介质，其特征在于，其上存储有计算机程序，其特征在于，该程序被处理器执行时实现如权利要求1～10任一所述方法的步骤，或实现如权利要求11～16任一所述方法的步骤。
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