WO2022016429A1 - Procédé, appareil et dispositif de commutation, et support de stockage - Google Patents

Procédé, appareil et dispositif de commutation, et support de stockage Download PDF

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Publication number
WO2022016429A1
WO2022016429A1 PCT/CN2020/103609 CN2020103609W WO2022016429A1 WO 2022016429 A1 WO2022016429 A1 WO 2022016429A1 CN 2020103609 W CN2020103609 W CN 2020103609W WO 2022016429 A1 WO2022016429 A1 WO 2022016429A1
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WIPO (PCT)
Prior art keywords
network device
access network
terminal
information
data transmission
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PCT/CN2020/103609
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English (en)
Chinese (zh)
Inventor
付喆
石聪
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to PCT/CN2020/103609 priority Critical patent/WO2022016429A1/fr
Priority to CN202080101504.6A priority patent/CN115699870B/zh
Publication of WO2022016429A1 publication Critical patent/WO2022016429A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a switching method, apparatus, device, and storage medium.
  • the terminal switches between serving cells provided by different base stations.
  • the terminal after the terminal switches from the source base station to the target base station, if the target base station does not support a certain slice service of the terminal due to some reasons (such as shortage of air interface resources), the terminal will release the slice service. After that, when the terminal moves into the coverage area of the base station that can provide the slice service, the terminal needs to initiate a recovery procedure related to the slice service again.
  • Embodiments of the present application provide a switching method, apparatus, device, and storage medium.
  • the technical solution is as follows:
  • a handover method applied to a terminal, the method includes:
  • a handover method is provided, which is applied to a first access network device, and the method includes:
  • Receive second information from a second access network device where the second information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • a handover method is provided, which is applied to a second access network device, and the method includes:
  • a switching apparatus which is set in a terminal, and the apparatus includes:
  • a receiving module configured to receive first information from the first access network device, where the first information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • a switching apparatus which is set in a first access network device, and the apparatus includes:
  • a receiving module configured to receive second information from a second access network device, where the second information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • a switching apparatus which is set in a second access network device, and the apparatus includes:
  • a sending module configured to send second information to the first access network device, where the second information is used to indicate a user data transmission channel that the second access network device does not support but does not need to release.
  • a terminal includes a processor and a transceiver connected to the processor; wherein:
  • the transceiver is configured to receive first information from the first access network device, where the first information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • an access network device includes a processor and a transceiver connected to the processor; wherein:
  • the transceiver is configured to receive second information from a second access network device, where the second information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • an access network device includes a processor and a transceiver connected to the processor; wherein:
  • the transceiver is configured to send second information to the first access network device, where the second information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • a computer-readable storage medium where a computer program is stored in the storage medium, and the computer program is used to be executed by a processor of a terminal, so as to implement the foregoing terminal-side switching method .
  • a computer-readable storage medium where a computer program is stored in the storage medium, and the computer program is configured to be executed by a processor of an access network device, so as to realize the above-mentioned first A handover method on the device side of the access network.
  • a computer-readable storage medium where a computer program is stored in the storage medium, and the computer program is configured to be executed by a processor of an access network device, so as to implement the above-mentioned second A handover method on the device side of the access network.
  • a chip is provided, the chip includes a programmable logic circuit and/or program instructions, and when the chip runs on a terminal, it is used to implement the switching method on the terminal side as described above.
  • a chip is provided.
  • the chip includes a programmable logic circuit and/or program instructions.
  • the chip runs on an access network device, the chip is configured to implement the first connection as described above.
  • the switching method on the network access device side.
  • a chip is provided.
  • the chip includes a programmable logic circuit and/or program instructions.
  • the chip runs on an access network device, the chip is configured to implement the second connection described above.
  • the switching method on the network access device side.
  • a computer program product is provided, when the computer program product runs on a terminal, the terminal is made to execute the above-mentioned switching method on the terminal side.
  • a computer program product which when the computer program product runs on an access network device, enables the access network device to execute the above-mentioned first access network device-side handover method.
  • a computer program product when the computer program product runs on an access network device, the access network device enables the access network device to execute the above-mentioned second access network device-side handover method.
  • the terminal for the user data transmission channel that is not supported by the target access network device, the terminal is instructed not to release the user data transmission channel, so that the terminal will not be able to switch between cells during the fast moving process. Release the user data transmission channel temporarily unable to provide services by the target access network equipment, and then when the terminal moves into the coverage area of the cell that can provide the above-mentioned user data transmission channel-related services, the terminal does not need to initiate the above-mentioned user data transmission channel-related services again. recovery process.
  • the terminal can suspend the transmission of one or some user data transmission channels in a short period of time, and restart the transmission of the above-mentioned suspended user data transmission channels at an appropriate timing. In this way, on the one hand, it helps to save the signaling overhead of the air interface, and on the other hand, it also helps to improve the service continuity.
  • FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • FIG. 2 shows a schematic diagram of a terminal handover process provided by the related art
  • FIG. 3 shows a schematic diagram of a terminal handover process provided by the present application
  • FIG. 5 is a flowchart of a handover method provided by another embodiment of the present application.
  • FIG. 6 is a flowchart of a handover method provided by another embodiment of the present application.
  • FIG. 7 is a flowchart of a handover method provided by another embodiment of the present application.
  • FIG. 8 is a block diagram of a switching apparatus provided by an embodiment of the present application.
  • FIG. 9 is a block diagram of a switching apparatus provided by another embodiment of the present application.
  • FIG. 10 is a block diagram of a switching apparatus provided by another embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a terminal provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of an access network device provided by an embodiment of the present application.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application.
  • the evolution of new business scenarios and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • FIG. 1 shows a schematic diagram of a network architecture provided by an embodiment of the present application.
  • the network architecture may include: a terminal 10 , an access network device 20 and a core network device 30 .
  • the terminal 10 may refer to UE (User Equipment, user equipment), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, user agent or user equipment.
  • the terminal 10 may also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol, session initiation protocol) phone, a WLL (Wireless Local Loop, wireless local loop) station, a PDA (Personal Digital Assistant, personal digital processing) , handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in 5GS (5th Generation System, fifth generation mobile communication system) or future evolved PLMN ( A terminal in a Public Land Mobi1e Network, a public land mobile communication network, etc., is not limited in this embodiment of the present application.
  • the devices mentioned above are collectively referred to as terminals.
  • the number of terminals 10 is usually multiple, and one or more terminal
  • the access network device 20 is a device deployed in the access network to provide the terminal 10 with a wireless communication function.
  • the access network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, and the like.
  • the names of devices with access network device functions may be different, for example, in 5G NR systems, they are called gNodeBs or gNBs.
  • the name "Access Network Equipment” may change.
  • the above-mentioned apparatuses for providing wireless communication functions for the terminal 10 are collectively referred to as access network equipment.
  • a communication relationship can be established between the terminal 10 and the core network device 30.
  • the access network device 20 may be EUTRAN (Evolved Universal Terrestrial Radio Access Network, Evolved Universal Terrestrial Radio Access Network) or one or more eNodeBs in EUTRAN;
  • EUTRAN Evolved Universal Terrestrial Radio Access Network
  • eNodeB eNodeB
  • the access network device 20 may be a RAN (Radio Access Network, radio access network) or one or more gNBs in the RAN.
  • the functions of the core network device 30 are mainly to provide user connection, manage users, and carry out services, and serve as an interface for the bearer network to provide an external network.
  • the core network equipment in the 5G NR system may include AMF (Access and Mobility Management Function) entity, UPF (User Plane Function, user plane function) entity and SMF (Session Management Function, session management function) entity function) entity and other equipment.
  • AMF Access and Mobility Management Function
  • UPF User Plane Function, user plane function
  • SMF Session Management Function, session management function
  • the access network device 20 and the core network device 30 communicate with each other through a certain air interface technology, such as the NG interface in the 5G NR system.
  • the access network device 20 and the terminal 10 communicate with each other through a certain air interface technology, such as a Uu interface.
  • the "5G NR system" in the embodiments of this application may also be referred to as a 5G system or an NR system, but those skilled in the art can understand its meaning.
  • the technical solutions described in the embodiments of this application may be applicable to the 5G NR system, and may also be applicable to the subsequent evolution system of the 5G NR system.
  • the terminal 10 can move within cells managed by different access network devices 20, for example, from the cell of the first access network device to the cell of the second access network device. In this way, the terminal 10 can be handed over from the cell of the first access network device to the cell of the second access network device.
  • the first access network device may be referred to as a source access network device or a source base station
  • the second access network device may be referred to as a target access network device or a target base station.
  • FIG. 2 it shows a schematic diagram of a terminal handover process provided by the related art.
  • the AMF provides mobility control information to the base station, and measurement control and reporting are performed between the terminal and the source base station.
  • the source base station makes a handover decision according to the measurement report of the terminal, it sends a handover request (Handover Request) to the target base station.
  • the target base station performs admission control, and when it is determined that the terminal is allowed to handover, the target base station sends a handover request response (Handover Request Acknowledge) to the source base station.
  • the RAN handover is initiated, and the terminal is separated from the old cell and synchronized to the new cell.
  • the source base station sends the SN (Serial Number, serial number) status transfer (SN Status Transfer) to the target base station.
  • the source base station obtains buffered data and new data from the UPF, and then sends the above-mentioned user data to the target base station.
  • the target base station buffers user data from the source base station. So far, the RAN handover is complete.
  • the target base station sends a path switch request (Path Switch Request) to the AMF, the AMF and the UPF perform path switching, and then the UPF sends an end indicator (End Marker) to the source base station, and the source base station forwards the end indication information to the target base station.
  • the AMF sends a Path Switch Request Acknowledge to the target base station, and the target base station instructs the source base station to release the terminal context information.
  • the handover request sent by the source base station to the target base station includes the network slice information supported by the current user plane of the terminal.
  • This information can be indicated by the PDU Session Resources To Be Setup List.
  • the list can include The identifier of the network slice supported by the current user plane of the terminal, namely S-NSSAI (Single Network Slice Selection Assistance Information, single network slice selection assistance information).
  • the handover request response sent by the target base station to the source base station contains slice information that the target base station does not support. This information can be indicated by the PDU Session Resources Not Admitted List.
  • the list can include the target The identifier of the network slice not supported by the base station.
  • step 8 of FIG. 2 user data is exchanged between the terminal and the target base station over the air interface.
  • the UPF data plane path is switched, that is, the terminal-related data transmission path established between the UPF and the base station is switched from the source base station to the target base station.
  • the terminal When the terminal is handed over, it may only stay at the target base station for a short time (it can be judged according to the movement state (such as high/medium/low speed)). At this time, if the target base station does not support a certain slice service of the terminal on the air interface (eg, due to shortage of air interface resources), the terminal needs to release the slice service. After that, when the terminal moves into the coverage area of the base station that can provide the slice service, the terminal needs to initiate a recovery procedure related to the slice service again. However, it is obviously inappropriate to do so, which will not only increase the air interface signaling overhead, but also affect the service continuity.
  • the first access network device may send mobility-related information of the terminal to the second access network device, where the mobility-related information may include the mobility of the terminal speed value and/or moving speed level information, optionally the mobility-related information is included in the handover request;
  • the second access network device determines, based on the mobility-related information of the terminal, the information provided by the terminal in the second access network device Whether there is a short-term camping in the cell, if it is a short-term camping, notify the first access network device of the second access in RRC (Radio Resource Control, Radio Resource Control) signaling (such as a handover request response).
  • RRC Radio Resource Control, Radio Resource Control
  • the second access network device may provide the terminal with a data forwarding service for the data packets related to the above-mentioned user data transmission channel.
  • the first access network device informs the terminal of the user data transmission channel that the second access network device does not support but does not need to release.
  • the terminal switches from the first access network device to the second access network device, the uplink and downlink transmission of the data packets related to the above-mentioned user data transmission channel is suspended between the terminal and the second access network device.
  • the second access network device caches the received data packets related to the user data transmission channel, and after the terminal switches from the second access network device to the third access network device, the cached data is stored.
  • the packet is sent to the third access network device, so as to provide the terminal with a data forwarding service.
  • the terminal for the user data transmission channel that is not supported by the target access network device, the terminal is instructed not to release the user data transmission channel, so that the terminal will not be able to switch between cells during the fast moving process. Release the user data transmission channel temporarily unable to provide services by the target access network equipment, and then when the terminal moves into the coverage area of the cell that can provide the above-mentioned user data transmission channel-related services, the terminal does not need to initiate the above-mentioned user data transmission channel-related services again. recovery process.
  • the terminal can suspend the transmission of one or some user data transmission channels in a short period of time, and restart the transmission of the above-mentioned suspended user data transmission channels at an appropriate timing. In this way, on the one hand, it helps to save the signaling overhead of the air interface, and on the other hand, it also helps to improve the service continuity.
  • FIG. 4 shows a flowchart of a handover method provided by an embodiment of the present application.
  • the method can be applied to the terminal.
  • the method may include the following steps:
  • Step 410 Receive first information from the first access network device, where the first information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • the first access network device is an access network device to which the terminal is currently connected. That is, the terminal is currently in a cell provided by the first access network device.
  • the second access network device is an access network device to which the terminal is to be handed over. That is, the terminal will access the cell provided by the second access network device.
  • the terminal is to be handed over from the first access network device to the second access network device.
  • the first access network device may be referred to as a source access network device or a source base station
  • the second access network device may be referred to as a target access network device or a target base station.
  • the first information is used to indicate that after the terminal switches to the second access network device (for example, after the terminal switches from the first access network device to the second access network device), the second access network device User data transmission channel that is not supported but not released.
  • the second access network device may not support one or some user data transmission channels of the terminal due to some reasons (for example, air interface resource shortage).
  • the so-called user data transmission channel that is not supported by the second access network device but not released refers to the user data transmission channel that the second access network device cannot provide but the terminal does not need to release.
  • the user data transmission channel refers to a channel for transmitting user data.
  • the user data transmission channel includes but is not limited to at least one of the following: network slice, PDU (Protocol Data Unit, Protocol Data Unit) session, DRB (Data Radio Bearer, Data Radio Bearer), QoS (Quality of Service, Quality of Service) flow.
  • the first information includes but is not limited to at least one of the following: a PDU session resource list, a DRB list, and a QoS flow list.
  • the PDU session resource list includes, but is not limited to, at least one of the following: at least one network slice identifier, and at least one PDU session identifier.
  • the network slice identifier is the identifier information of the network slice
  • the PDU session identifier is the identifier information of the PDU session.
  • the DRB list includes at least one DRB identifier
  • the DRB identifier is the identifier information of the DRB.
  • the QoS flow list includes at least one QoS flow ID, and the QoS flow ID is identification information of the QoS flow.
  • the first information is included in an RRC reconfiguration command, where the RRC reconfiguration command is used to instruct the terminal to switch to the second access network device.
  • the RRC reconfiguration command is used to instruct the terminal to switch from the first access network device to the second access network device.
  • the RRC reconfiguration command may include the above-mentioned first information to inform the terminal of the user data transmission channel that the second access network device does not support but does not need to release.
  • the terminal will not communicate with the above-mentioned user data transmission channel (that is, The second access network device sends data packets related to the user data transmission channel that the second access network device does not support but does not need to release) to the second access network device, and/or does not expect to receive the above-mentioned user data transmission from the second access network device.
  • Data packets related to the channel that is, the user data transmission channel that is not supported but not released by the second access network device. That is, the terminal may suspend the uplink and downlink transmission of the data packets related to the above-mentioned user data transmission channel.
  • the second access network device provides the terminal with data forwarding (data forwarding) for the data packets related to the above-mentioned user data transmission channel (that is, the user data transmission channel that the second access network device does not support but does not need to release).
  • Data forwarding can also be called data forwarding.
  • the second access network device can forward the data packets related to the user data transmission channel to other access network devices (such as access network devices that support the user data transmission channel), and then forward the data packets related to the user data transmission channel to other access network devices (such as access network devices that support the user data transmission channel). Sent to the terminal by other access network equipment.
  • the second access network device does not send a path switching request to the core network device, where the path switching request refers to switching the terminal-related data transmission path established between the core network device and the access network device to the second access network device.
  • a request from an access network device; and/or, the core network device does not send end indication information to the first access network device, where the end indication information is used to instruct the first access network device to stop providing terminal-related information to the core network device.
  • the data package For example, the second access network device does not send a path switching request to the first core network device (eg, AMF), and the second core network device (eg, UPF) does not send end indication information to the first access network device.
  • the first core network device eg, AMF
  • the second core network device eg, UPF
  • the UPF data plane path needs to be switched, that is, the terminal-related data transmission path established between the UPF and the base station is switched from the source base station to the target base station.
  • path switching for the second access network device may not be performed, that is, the terminal-related data will not be transmitted.
  • the path is switched from the first access network device to the second access network device, which helps simplify the interaction process and save signaling overhead.
  • the UPF may send the data packet related to the terminal to the first access network device, and then the first access network device forwards the above-mentioned data packet to the second access network device. access network equipment.
  • the handover of the UPF data plane path may also be performed according to the handover process shown in FIG. 2 .
  • the second access network device sends a path switching request to the AMF, the AMF and the UPF perform path switching, and then the UPF sends end indication information to the first access network device, and the first access network device forwards the request to the second access network device The end indication information.
  • the AMF sends a path switching request response to the second access network device, and the second access network device instructs the first access network device to release the terminal context information.
  • the terminal receives third information from the second access network device, where the third information is used to indicate a user data transmission channel supported by the third access network device.
  • the terminal receives an RRC reconfiguration command from the second access network device, where the RRC reconfiguration command is used to instruct the terminal to switch to the third access network device.
  • the RRC reconfiguration command includes the user data transmission channel supported by the third access network device.
  • the user data transmission channel supported by the third access network device includes: a user data transmission channel not supported but not released by the second access network device.
  • the technical solutions provided by the embodiments of the present application for the user data transmission channel that is not supported by the target access network device, by instructing the terminal not to release the user data transmission channel, so that the terminal can switch cells during the fast moving process.
  • the user data transmission channel that the target access network device cannot provide services temporarily is not released, and then when the terminal moves into the coverage area of the cell that can provide the services related to the user data transmission channel, the terminal does not need to initiate communication with the above user data again.
  • the recovery process related to the transmission channel the terminal can suspend the transmission of one or some user data transmission channels in a short period of time, and restart the transmission of the above-mentioned suspended user data transmission channels at an appropriate timing. In this way, on the one hand, it helps to save the signaling overhead of the air interface, and on the other hand, it also helps to improve the service continuity.
  • FIG. 5 shows a flowchart of a handover method provided by another embodiment of the present application.
  • the method can be applied to the first access network device.
  • the method may include the following steps:
  • Step 510 Receive second information from the second access network device, where the second information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • the first access network device is an access network device to which the terminal is currently connected. That is, the terminal is currently in a cell provided by the first access network device.
  • the second access network device is an access network device to which the terminal is to be handed over. That is, the terminal will access the cell provided by the second access network device.
  • the terminal is to be handed over from the first access network device to the second access network device.
  • the first access network device may be referred to as a source access network device or a source base station
  • the second access network device may be referred to as a target access network device or a target base station.
  • the second information is used to indicate that after the terminal switches to the second access network device (for example, after the terminal switches from the first access network device to the second access network device), the second access network device User data transmission channel that is not supported but not released.
  • the second access network device may not support one or some user data transmission channels of the terminal due to some reasons (for example, air interface resource shortage).
  • the so-called user data transmission channel that is not supported by the second access network device but not released refers to the user data transmission channel that the second access network device cannot provide but the terminal does not need to release.
  • the user data transmission channel refers to a channel for transmitting user data.
  • the user data transmission channel includes but is not limited to at least one of the following: network slice, PDU (Protocol Data Unit, Protocol Data Unit) session, DRB (Data Radio Bearer, Data Radio Bearer), QoS (Quality of Service, Quality of Service) flow.
  • the second information includes at least one of the following: a PDU session resource list, a DRB list, and a QoS flow list.
  • the PDU session resource list includes, but is not limited to, at least one of the following: at least one network slice identifier, and at least one PDU session identifier.
  • the network slice identifier is the identifier information of the network slice
  • the PDU session identifier is the identifier information of the PDU session.
  • the DRB list includes at least one DRB identifier
  • the DRB identifier is the identifier information of the DRB.
  • the QoS flow list includes at least one QoS flow ID, and the QoS flow ID is identification information of the QoS flow.
  • the first access network device after the first access network device receives the second information from the second access network device, the first access network device sends the first information to the terminal, where the first information is used to indicate the first information to the terminal. 2.
  • User data transmission channels that are not supported by the access network equipment but do not need to be released.
  • the second information and the first information may be the same or different, for example, the first access network device may determine the first information according to the received second information.
  • the above-mentioned user data transmission channel (that is, the transmission of user data not supported but not released by the second access network device) is not transmitted between the terminal and the second access network device. channel) data.
  • the terminal does not send data packets related to the user data transmission channel to the second access network device, nor does it expect to receive data packets related to the user data transmission channel from the second access network device.
  • the second access network device provides the terminal with data forwarding (data forwarding) for the data packets related to the above-mentioned user data transmission channel (that is, the user data transmission channel that the second access network device does not support but does not need to release).
  • Data forwarding can also be called data forwarding.
  • the second access network device can forward the data packets related to the user data transmission channel to other access network devices (such as access network devices that support the user data transmission channel), and then forward the data packets related to the user data transmission channel to other access network devices (such as access network devices that support the user data transmission channel). Sent to the terminal by other access network equipment.
  • the first access network device sends the second access network device with the above-mentioned user data transmission channel (that is, the first access network device). 2.
  • a data forwarding service for the data packet is provided by the second access network device.
  • the second access network device does not send a path switching request to the core network device, where the path switching request refers to switching the terminal-related data transmission path established between the core network device and the access network device to the second access network device.
  • a request from an access network device; and/or, the core network device does not send end indication information to the first access network device, where the end indication information is used to instruct the first access network device to stop providing terminal-related information to the core network device.
  • the data package For example, the second access network device does not send a path switching request to the first core network device (eg, AMF), and the second core network device (eg, UPF) does not send end indication information to the first access network device.
  • the first core network device eg, AMF
  • the second core network device eg, UPF
  • the UPF data plane path needs to be handed over, that is, the terminal-related data transmission path established between the UPF and the base station is handed over from the source base station to the target base station.
  • path switching for the second access network device may not be performed, that is, the terminal-related data will not be transmitted.
  • the path is switched from the first access network device to the second access network device, which helps simplify the interaction process and save signaling overhead.
  • the UPF may send the data packet related to the terminal to the first access network device, and then the first access network device forwards the above-mentioned data packet to the second access network device. access network equipment.
  • the handover of the UPF data plane path may also be performed according to the handover process shown in FIG. 2 .
  • the second access network device sends a path switching request to the AMF, the AMF and the UPF perform path switching, and then the UPF sends end indication information to the first access network device, and the first access network device forwards the request to the second access network device The end indication information.
  • the AMF sends a path switching request response to the second access network device, and the second access network device instructs the first access network device to release the terminal context information.
  • the first access network device sends mobility-related information of the terminal to the second access network device, where the mobility-related information is used to indicate a mobility state of the terminal.
  • the mobility-related information includes at least one of the following: a movement speed value of the terminal, and movement speed level information of the terminal.
  • the moving speed value of the terminal may be an exact value or an estimated value of the moving speed of the terminal.
  • the moving speed grade information of the terminal refers to the grade to which the moving speed of the terminal belongs. For example, the moving speed is divided into three different grades: high, medium, and low, and the moving speed grade information of the terminal is the above-mentioned high, medium, and low. any kind.
  • the first access network device may derive the mobility-related information of the terminal from the mobility history information (such as mobility history information IE or mobility history information) of the terminal.
  • the above-mentioned movement history record information may include information about the cells that the terminal has passed through and the time spent in each cell, and the first access network device may determine the movement speed value or movement speed level information of the terminal accordingly.
  • the second access network device After receiving the mobility-related information of the terminal, the second access network device can determine whether the terminal is camped on for a short time in the cell provided by the second access network device. The second access network device determines the user data transmission channel that it does not support but does not need to release, and then sends the above-mentioned second information to the first access network device.
  • the mobility-related information is included in the handover request sent by the first access network device to the second access network device
  • the second information is included in the handover request sent by the second access network device to the first access network device request response.
  • the above handover request is used to request to switch the terminal from the first access network device to the second access network device
  • the above handover request response may be an affirmative response to the above handover request, used to indicate to the first access network device It is agreed that the terminal is handed over from the first access network device to the second access network device.
  • the technical solutions provided by the embodiments of the present application are notified to the source access network device through the target access network device, so that the source access network device can notify the source access network device.
  • the terminal For the terminal, during the cell handover process in the fast moving process, the terminal does not release the user data transmission channel temporarily unable to provide services by the target access network equipment, and then the terminal moves to the cell coverage that can provide the above-mentioned user data transmission channel related services. When it is within the range, the terminal does not need to initiate the recovery process related to the above-mentioned user data transmission channel again.
  • the terminal can suspend the transmission of one or some user data transmission channels in a short period of time, and restart the transmission of the above-mentioned suspended user data transmission channels at an appropriate timing. In this way, on the one hand, it helps to save the signaling overhead of the air interface, and on the other hand, it also helps to improve the service continuity.
  • FIG. 6 shows a flowchart of a handover method provided by another embodiment of the present application.
  • the method can be applied to the second access network device.
  • the method may include the following steps:
  • Step 610 Send second information to the first access network device, where the second information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • the first access network device is an access network device to which the terminal is currently connected. That is, the terminal is currently in a cell provided by the first access network device.
  • the second access network device is an access network device to which the terminal is to be handed over. That is, the terminal will access the cell provided by the second access network device.
  • the terminal is to be handed over from the first access network device to the second access network device.
  • the first access network device may be referred to as a source access network device or a source base station
  • the second access network device may be referred to as a target access network device or a target base station.
  • the second information is used to indicate that after the terminal switches to the second access network device (for example, after the terminal switches from the first access network device to the second access network device), the second access network device User data transmission channel that is not supported but not released.
  • the second access network device may not support one or some user data transmission channels of the terminal due to some reasons (for example, air interface resource shortage).
  • the so-called user data transmission channel that is not supported by the second access network device but not released refers to the user data transmission channel that the second access network device cannot provide but the terminal does not need to release.
  • the user data transmission channel refers to a channel for transmitting user data.
  • the user data transmission channel includes but is not limited to at least one of the following: network slice, PDU (Protocol Data Unit, Protocol Data Unit) session, DRB (Data Radio Bearer, Data Radio Bearer), QoS (Quality of Service, Quality of Service) flow.
  • the second information includes at least one of the following: a PDU session resource list, a DRB list, and a QoS flow list.
  • the PDU session resource list includes, but is not limited to, at least one of the following: at least one network slice identifier, and at least one PDU session identifier.
  • the network slice identifier is the identifier information of the network slice
  • the PDU session identifier is the identifier information of the PDU session.
  • the DRB list includes at least one DRB identifier
  • the DRB identifier is the identifier information of the DRB.
  • the QoS flow list includes at least one QoS flow ID, and the QoS flow ID is identification information of the QoS flow.
  • the above-mentioned user data transmission channel (that is, the transmission of user data not supported but not released by the second access network device) is not transmitted between the terminal and the second access network device. channel) data.
  • the terminal does not send data packets related to the user data transmission channel to the second access network device, nor does it expect to receive data packets related to the user data transmission channel from the second access network device.
  • the second access network device provides the terminal with data forwarding (data forwarding) for the data packets related to the above-mentioned user data transmission channel (that is, the user data transmission channel that the second access network device does not support but does not need to release).
  • Data forwarding can also be called data forwarding.
  • the second access network device can forward the data packets related to the user data transmission channel to other access network devices (such as access network devices that support the user data transmission channel), and then forward the data packets related to the user data transmission channel to other access network devices (such as access network devices that support the user data transmission channel). Sent to the terminal by other access network equipment.
  • the first access network device sends the second access network device with the above-mentioned user data transmission channel (that is, the first access network device). 2.
  • a data forwarding service for the data packet is provided by the second access network device.
  • the second access network device buffers the data packets.
  • the second access network device sends the buffered data packet to the third access network device, so as to provide data for the terminal For the fronthaul service, the data packets related to the user data transmission channel whose transmission has been suspended before are sent to the terminal.
  • the second access network device sends a handover request to the third access network device, where the handover request includes a request for a user data transmission channel accepted by the third access network device, and the accepted user data transmission channel includes the above-mentioned first The user data transmission channel indicated by the second information (that is, the user data transmission channel that is not supported but not released by the second access network device).
  • the above handover request includes a PDU session resource establishment list, where the PDU session resource establishment list is used to indicate that the terminal requests a user data transmission channel accepted by the third access network device after switching to the third access network device.
  • the second access network device receives a handover request response from the third access network device, where the handover request response includes a user data transmission channel supported by the third access network device.
  • the user data transmission channels supported by the third access network device are some or all of the user data transmission channels in the user data transmission channels that are requested to be accepted by the third access network device.
  • the second access network device sends third information to the terminal, where the third information is used to indicate to the terminal a user data transmission channel supported by the third access network device.
  • the second access network device sends an RRC reconfiguration command to the terminal, where the RRC reconfiguration command is used to instruct the terminal to switch to the third access network device.
  • the RRC reconfiguration command includes the user data transmission channel supported by the third access network device.
  • the user data transmission channel supported by the third access network device includes: a user data transmission channel not supported but not released by the second access network device. In this way, after the terminal establishes a connection with the third access network device, the user data transmission channel whose transmission was suspended before can be restarted for transmission.
  • the second access network device receives mobility-related information of the terminal from the first access network device, where the mobility-related information is used to indicate a mobility state of the terminal.
  • the mobility-related information includes at least one of the following: a movement speed value of the terminal, and movement speed level information of the terminal.
  • the moving speed value of the terminal may be an exact value or an estimated value of the moving speed of the terminal.
  • the moving speed grade information of the terminal refers to the grade to which the moving speed of the terminal belongs. For example, the moving speed is divided into three different grades: high, medium, and low, and the moving speed grade information of the terminal is the above-mentioned high, medium, and low. any kind.
  • the first access network device may derive the mobility-related information of the terminal from the mobility history information (such as mobility history information IE or mobility history information) of the terminal.
  • the above-mentioned movement history record information may include information about the cells that the terminal has passed through and the time spent in each cell, and the first access network device may determine the movement speed value or movement speed level information of the terminal accordingly.
  • the second access network device After receiving the mobility-related information of the terminal, the second access network device can determine whether the terminal is camped on for a short time in the cell provided by the second access network device. The second access network device determines the user data transmission channel that it does not support but does not need to release, and then sends the above-mentioned second information to the first access network device.
  • the mobility-related information is included in the handover request sent by the first access network device to the second access network device
  • the second information is included in the handover request sent by the second access network device to the first access network device request response.
  • the above handover request is used to request to switch the terminal from the first access network device to the second access network device
  • the above handover request response may be an affirmative response to the above handover request, used to indicate to the first access network device It is agreed that the terminal is handed over from the first access network device to the second access network device.
  • the second access network device does not send a path switching request to the core network device, where the path switching request refers to switching the terminal-related data transmission path established between the core network device and the access network device to the second access network device.
  • a request from an access network device; and/or, the core network device does not send end indication information to the first access network device, where the end indication information is used to instruct the first access network device to stop providing terminal-related information to the core network device.
  • the data package For example, the second access network device does not send a path switching request to the first core network device (eg, AMF), and the second core network device (eg, UPF) does not send end indication information to the first access network device.
  • the first core network device eg, AMF
  • the second core network device eg, UPF
  • the UPF data plane path needs to be handed over, that is, the terminal-related data transmission path established between the UPF and the base station is handed over from the source base station to the target base station.
  • path switching for the second access network device may not be performed, that is, the terminal-related data will not be transmitted.
  • the path is switched from the first access network device to the second access network device, which helps simplify the interaction process and save signaling overhead.
  • the UPF may send the data packet related to the terminal to the first access network device, and then the first access network device forwards the above-mentioned data packet to the second access network device. access network equipment.
  • the handover of the UPF data plane path may also be performed according to the handover process shown in FIG. 2 .
  • the second access network device sends a path switching request to the AMF, the AMF and the UPF perform path switching, and then the UPF sends end indication information to the first access network device, and the first access network device forwards the request to the second access network device The end indication information.
  • the AMF sends a path switching request response to the second access network device, and the second access network device instructs the first access network device to release the terminal context information.
  • the technical solutions provided by the embodiments of the present application are notified to the source access network device through the target access network device, so that the source access network device can notify the source access network device.
  • the terminal For the terminal, during the cell handover process in the fast moving process, the terminal does not release the user data transmission channel temporarily unable to provide services by the target access network equipment, and then the terminal moves to the cell coverage that can provide the above-mentioned user data transmission channel related services. When it is within the range, the terminal does not need to initiate the recovery process related to the above-mentioned user data transmission channel again.
  • the terminal can suspend the transmission of one or some user data transmission channels in a short period of time, and restart the transmission of the above-mentioned suspended user data transmission channels at an appropriate timing. In this way, on the one hand, it helps to save the signaling overhead of the air interface, and on the other hand, it also helps to improve the service continuity.
  • FIG. 7 shows a flowchart of a handover method provided by another embodiment of the present application.
  • the method may include the following steps (701-712):
  • Step 701 In the case of determining to switch the terminal from the first access network device to the second access network device, the first access network device sends the mobility-related information of the terminal to the second access network device.
  • the related information is used to indicate the mobile state of the terminal.
  • the second access network device receives the mobility-related information of the terminal from the first access network device.
  • the first access network device may derive the mobility-related information of the terminal from the mobility history information (such as mobility history information IE or mobility history information) of the terminal, including, for example, the moving speed value and/or the moving speed level of the terminal.
  • the information is then sent to the second access network device by including the mobility-related information of the above-mentioned terminal in the RRC signaling (eg, Handover Request).
  • the RRC signaling (such as Handover Request) may also include a PDU Session Resources To Be Setup List (PDU Session Resources To Be Setup List), which is used to instruct the terminal to request the user data transmission channel accepted by the second access network device.
  • Step 702 the second access network device estimates whether the terminal camps for a short time in the cell provided by the second access network device based on the mobility-related information of the terminal.
  • the movement speed value of the terminal is greater than a preset threshold and/or the movement speed level information of the terminal is preset level information (eg, high level), it is determined that the terminal is short in the cell provided by the second access network device time stay.
  • preset level information eg, high level
  • Step 703 if the estimated result is a short-term dwell, the second access network device sends second information to the first access network device, the second information is used to indicate that the second access network device does not support but does not need to release user data transmission channel.
  • the second access network device sends the second information to the first access network device by including the above-mentioned second information in the RRC signaling (eg, Handover Request Acknowledge).
  • the above-mentioned second information is a PDU Session Resource Suspended List (PDU Session Resources Suspended List), and the PDU Session Resource Suspended List includes at least one network slice identifier that is not supported by the second access network device but does not need to be released and /or at least one PDU session identifier.
  • the second access network device can provide data forwarding services, so the second information is also equivalent to indicating the second access network device.
  • the network access device provides the terminal with a user data transmission channel for data forwarding services.
  • the second access network device may feed back the PDU Session Resources Admitted List to the first access network device in RRC signaling (such as Handover Request Acknowledge). ) and/or PDU Session Resources Not Admitted List.
  • the PDU session resource allowed list includes user data transmission channels accepted by the second access network device
  • the PDU session resource disallowed list includes user data transmission channels not accepted by the second access network device.
  • Step 704 The first access network device sends first information to the terminal, where the first information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • the terminal receives the first information from the first access network device.
  • the first access network device sends a handover command to the terminal, where the handover command is used to instruct the terminal to switch from the first access network device to the second access network device, and the handover command may include the above-mentioned first information.
  • Step 705 the terminal does not send data packets related to the above-mentioned user data transmission channel to the second access network device, and/or does not expect to receive data packets related to the above-mentioned user data transmission channel from the second access network device .
  • the terminal may suspend the uplink and downlink transmission of the data packets related to the above-mentioned user data transmission channel.
  • Step 706 The first access network device sends a data packet related to the above-mentioned user data transmission channel to the second access network device.
  • the second access network device receives the data packets related to the above-mentioned user data transmission channel from the first access network device and/or the UPF.
  • Step 707 the second access network device caches the above-mentioned data packets.
  • Step 708 In the case of determining that the terminal is to be handed over from the second access network device to the third access network device, the second access network device sends a handover request to the third access network device.
  • the handover request includes a PDU session resource establishment list.
  • the PDU session resource establishment list is used to instruct the terminal to request the user data transmission channel accepted by the third access network device after switching to the third access network device, and the accepted user data transmission channel includes the information indicated by the second information above.
  • the user data transmission channel that is not supported but not released by the second access network device.
  • Step 709 the third access network device sends a handover request response to the second access network device.
  • the handover request response includes a user data transmission channel supported by the third access network device.
  • the user data transmission channels supported by the third access network device are some or all of the user data transmission channels in the user data transmission channels that are requested to be accepted by the third access network device.
  • the second access network device receives the handover request response from the third access network device.
  • Step 710 The second access network device sends third information to the terminal, where the third information is used to indicate to the terminal a user data transmission channel supported by the third access network device.
  • Step 711 After the terminal is switched from the second access network device to the third access network device, data in the user data transmission channel supported by the third access network device is transmitted between the terminal and the third access network device.
  • the user data transmission channel supported by the third access network device includes: a user data transmission channel not supported but not released by the second access network device.
  • the user data transmission channel whose transmission was suspended before can be restarted for transmission.
  • Step 712 after the terminal switches from the second access network device to the third access network device, the second access network device sends the buffered data packet to the third access network device.
  • the technical solutions provided by the embodiments of the present application are notified to the source access network device through the target access network device, so that the source access network device can notify the source access network device.
  • the terminal For the terminal, during the cell handover process in the fast moving process, the terminal does not release the user data transmission channel temporarily unable to provide services by the target access network equipment, and then the terminal moves to the cell coverage that can provide the above-mentioned user data transmission channel related services. When it is within the range, the terminal does not need to initiate the recovery process related to the above-mentioned user data transmission channel again.
  • the terminal can suspend the transmission of one or some user data transmission channels in a short period of time, and restart the transmission of the above-mentioned suspended user data transmission channels at an appropriate timing. In this way, on the one hand, it helps to save the signaling overhead of the air interface, and on the other hand, it also helps to improve the service continuity.
  • the source access network device notifies the target access network device of the mobility-related information of the terminal, so that the target access network device can determine whether the terminal resides in the cell provided by the terminal for a short time based on the mobility-related information of the terminal. stay, and in the case of staying for a short time, notify the source network device of the user data transmission channel that it does not support but do not need to release, so as to realize the estimation and judgment of the terminal movement state, and then achieve the above-mentioned terminal in the fast moving process.
  • the purpose of not releasing the user data transmission channel temporarily unable to provide services by the target access network equipment.
  • FIG. 8 shows a block diagram of a switching apparatus provided by an embodiment of the present application.
  • the apparatus has the function of implementing the above-mentioned method example on the terminal side, and the function may be implemented by hardware, or by executing corresponding software in hardware.
  • the device may be the terminal described above, or may be set in the terminal.
  • the apparatus 800 may include: a receiving module 810 .
  • the receiving module 810 is configured to receive first information from the first access network device, where the first information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • the terminal does not send data packets related to the user data transmission channel to the second access network device, and/or does not expect to receive data packets from the second access network device the data packets related to the user data transmission channel.
  • the user data transmission channel includes at least one of the following: network slice, PDU session, DRB, QoS flow.
  • the first information includes at least one of the following: a PDU session resource list, a DRB list, and a QoS flow list.
  • the PDU session resource list includes at least one of the following: at least one network slice identifier, at least one PDU session identifier; the DRB list includes at least one DRB identifier; the QoS flow list includes at least one QoS Stream ID.
  • the first information is included in an RRC reconfiguration command, and the RRC reconfiguration command is used to instruct the terminal to switch to the second access network device.
  • the second access network device provides the terminal with a data forwarding service for data packets related to the user data transmission channel.
  • the second access network device does not send a path switching request to the core network device, and/or the core network device does not send end indication information to the first access network device;
  • the path switching request refers to a request to switch the data transmission path related to the terminal established between the core network device and the access network device to the second access network device, and the end indication information is used for for instructing the first access network device to stop providing the terminal-related data packets to the core network device.
  • the receiving module 810 is further configured to receive third information from the second access network device, where the third information is used to indicate user data supported by the third access network device transmission channel.
  • the user data transmission channel supported by the third access network device includes: a user data transmission channel that is not supported but not released by the second access network device.
  • FIG. 9 shows a block diagram of a switching apparatus provided by an embodiment of the present application.
  • the apparatus has the function of implementing the above-mentioned method example on the device side of the first access network, and the function may be implemented by hardware or by executing corresponding software in hardware.
  • the apparatus may be the first access network device introduced above, or may be set in the first access network device.
  • the apparatus 900 may include: a receiving module 910 .
  • the receiving module 910 is configured to receive second information from the second access network device, where the second information is used to indicate a user data transmission channel that the second access network device does not support but does not need to release.
  • the user data transmission channel includes at least one of the following: network slice, PDU session, DRB, QoS flow.
  • the second information includes at least one of the following: a PDU session resource list, a DRB list, and a QoS flow list.
  • the apparatus 900 further includes: a sending module
  • the sending module is configured to send first information to the terminal, where the first information is used to indicate to the terminal a user data transmission channel that is not supported but not released by the second access network device.
  • the first information includes at least one of the following: a PDU session resource list, a DRB list, and a QoS flow list.
  • the PDU session resource list includes at least one of the following: at least one network slice identifier, at least one PDU session identifier; the DRB list includes at least one DRB identifier; the QoS flow list includes at least one A QoS flow identifier.
  • the first information is included in an RRC reconfiguration command, and the RRC reconfiguration command is used to instruct the terminal to switch to the second access network device.
  • data in the user data transmission channel is not transmitted between the terminal and the second access network device.
  • the second access network device provides the terminal with a data forwarding service for data packets related to the user data transmission channel.
  • the apparatus 900 further includes: a sending module
  • the sending module is configured to send a data packet related to the user data transmission channel to the second access network device.
  • the second access network device does not send a path switching request to the core network device, and/or the core network device does not send end indication information to the first access network device;
  • the path switching request refers to a request to switch the terminal-related data transmission path established between the core network device and the access network device to the second access network device, and the end indication information is used to send a request to the second access network device.
  • the first access network device instructs the core network device to stop providing terminal-related data packets to it.
  • the apparatus 900 further includes: a sending module
  • the sending module is configured to send the mobility-related information of the terminal to the second access network device, where the mobility-related information is used to indicate the mobility state of the terminal.
  • the mobility-related information includes at least one of the following: a movement speed value of the terminal, and movement speed level information of the terminal.
  • the mobility-related information is included in a handover request sent by the first access network device to the second access network device, and the second information is included in the second access network device.
  • the handover request response sent by the network access device to the first access network device is included in the handover request response sent by the network access device to the first access network device.
  • FIG. 10 shows a block diagram of a switching apparatus provided by an embodiment of the present application.
  • the apparatus has the function of implementing the above-mentioned method example on the device side of the second access network, and the function may be implemented by hardware or by executing corresponding software in hardware.
  • the apparatus may be the second access network device described above, or may be set in the second access network device.
  • the apparatus 1000 may include: a sending module 1010 .
  • the sending module 1010 is configured to send second information to the first access network device, where the second information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • the user data transmission channel includes at least one of the following: network slice, PDU session, DRB, QoS flow.
  • the second information includes at least one of the following: a PDU session resource list, a DRB list, and a QoS flow list.
  • the PDU session resource list includes at least one of the following: at least one network slice identifier, at least one PDU session identifier; the DRB list includes at least one DRB identifier; the QoS list includes at least one A QoS flow identifier.
  • data in the user data transmission channel is not transmitted between the terminal and the second access network device.
  • the second access network device provides the terminal with a data forwarding service for data packets related to the user data transmission channel.
  • the apparatus 1000 further includes: a receiving module;
  • the receiving module is configured to receive mobility-related information of a terminal from the first access network device, where the mobility-related information is used to indicate a mobility state of the terminal.
  • the mobility-related information includes at least one of the following: a movement speed value of the terminal, and movement speed level information of the terminal.
  • the mobility-related information is included in a handover request sent by the first access network device to the second access network device, and the second information is included in the second access network device.
  • the handover request response sent by the network access device to the first access network device is included in the handover request response sent by the network access device to the first access network device.
  • the second access network device does not send a path switching request to the core network device, and/or the core network device does not send end indication information to the first access network device;
  • the path switching request refers to a request to switch the terminal-related data transmission path established between the core network device and the access network device to the second access network device, and the end indication information is used to send a request to the second access network device.
  • the first access network device instructs the core network device to stop providing terminal-related data packets to it.
  • the apparatus 1000 further includes: a receiving module and a buffering module;
  • the receiving module configured to receive data packets related to the user data transmission channel from the first access network device and/or the core network device;
  • the cache module is used to cache the data packets.
  • the sending module 1010 is further configured to send the buffered data packet to the third access network device after the terminal switches from the second access network device to the third access network device access network equipment.
  • the sending module 1010 is further configured to send a handover request to a third access network device, where the handover request includes a request for a user data transmission channel accepted by the third access network device, so The accepted user data transmission channel includes the user data transmission channel indicated by the second information.
  • the apparatus 1000 further includes: a receiving module;
  • the receiving module configured to receive a handover request response from the third access network device, where the handover request response includes a user data transmission channel supported by the third access network device;
  • the sending module 1010 is further configured to send third information to the terminal, where the third information is used to indicate to the terminal a user data transmission channel supported by the third access network device.
  • the user data transmission channel supported by the third access network device includes: a user data transmission channel that is not supported but not released by the second access network device.
  • the device provided in the above embodiment realizes its functions, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated to different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • FIG. 11 shows a schematic structural diagram of a terminal 110 provided by an embodiment of the present application.
  • the terminal 110 may include: a processor 111 , a receiver 112 , a transmitter 113 , a memory 114 and a bus 115 .
  • the processor 111 includes one or more processing cores, and the processor 111 executes various functional applications and information processing by running software programs and modules.
  • the receiver 112 and the transmitter 113 may be implemented as a transceiver 116, which may be a communication chip.
  • the memory 114 is connected to the processor 111 through the bus 115 .
  • the memory 114 can be used to store a computer program, and the processor 111 is used to execute the computer program, so as to implement various steps performed by the terminal in the above method embodiments.
  • the memory 114 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, and the volatile or non-volatile storage device includes but is not limited to: RAM (Random-Access Memory, random access memory) and ROM (Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory, Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory) memory), flash memory or other solid-state storage technology, CD-ROM (Compact Disc Read-Only Memory), DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cassettes, magnetic tapes, magnetic disks storage or other magnetic storage devices. in:
  • the transceiver 116 is configured to receive first information from the first access network device, where the first information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • the terminal does not send data packets related to the user data transmission channel to the second access network device, and/or does not expect to receive data packets from the second access network device the data packets related to the user data transmission channel.
  • the user data transmission channel includes at least one of the following: network slice, PDU session, DRB, QoS flow.
  • the first information includes at least one of the following: a PDU session resource list, a DRB list, and a QoS flow list.
  • the PDU session resource list includes at least one of the following: at least one network slice identifier, at least one PDU session identifier; the DRB list includes at least one DRB identifier; the QoS flow list includes at least one QoS Stream ID.
  • the first information is included in an RRC reconfiguration command, and the RRC reconfiguration command is used to instruct the terminal to switch to the second access network device.
  • the second access network device provides the terminal with a data forwarding service for data packets related to the user data transmission channel.
  • the second access network device does not send a path switching request to the core network device, and/or the core network device does not send end indication information to the first access network device;
  • the path switching request refers to a request to switch the data transmission path related to the terminal established between the core network device and the access network device to the second access network device, and the end indication information is used for for instructing the first access network device to stop providing the terminal-related data packets to the core network device.
  • the transceiver 116 is further configured to receive third information from the second access network device, where the third information is used to indicate user data supported by the third access network device transmission channel.
  • the user data transmission channel supported by the third access network device includes: a user data transmission channel that is not supported but not released by the second access network device.
  • FIG. 12 shows a schematic structural diagram of an access network device 120 provided by an embodiment of the present application.
  • the access network device 120 may include: a processor 121 , a receiver 122 , a transmitter 123 , a memory 124 and a bus 125 .
  • the processor 121 includes one or more processing cores, and the processor 121 executes various functional applications and information processing by running software programs and modules.
  • the receiver 122 and the transmitter 123 may be implemented as a transceiver 126, which may be a communication chip.
  • the memory 124 is connected to the processor 121 through the bus 125 .
  • the memory 124 may be used to store a computer program, and the processor 121 is used to execute the computer program, so as to implement each step performed by the access network device in the above method embodiments.
  • the memory 124 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, and the volatile or non-volatile storage device includes but is not limited to: RAM (Random-Access Memory, random access memory) and ROM (Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory, Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory) memory), flash memory or other solid-state storage technology, CD-ROM (Compact Disc Read-Only Memory), DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cassettes, magnetic tapes, magnetic disks storage or other magnetic storage devices. in:
  • the access network device 120 is the first access network device introduced in the above embodiment
  • the transceiver 126 is configured to receive second information from a second access network device, where the second information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • the user data transmission channel includes at least one of the following: network slice, PDU session, DRB, QoS flow.
  • the second information includes at least one of the following: a PDU session resource list, a DRB list, and a QoS flow list.
  • the transceiver 126 is further configured to send first information to the terminal, where the first information is used to indicate to the terminal user data that the second access network device does not support but does not need to release transmission channel.
  • the first information includes at least one of the following: a PDU session resource list, a DRB list, and a QoS flow list.
  • the PDU session resource list includes at least one of the following: at least one network slice identifier, at least one PDU session identifier; the DRB list includes at least one DRB identifier; the QoS flow list includes at least one A QoS flow identifier.
  • the first information is included in an RRC reconfiguration command, and the RRC reconfiguration command is used to instruct the terminal to switch to the second access network device.
  • data in the user data transmission channel is not transmitted between the terminal and the second access network device.
  • the second access network device provides the terminal with a data forwarding service for data packets related to the user data transmission channel.
  • the transceiver 126 is further configured to send data packets related to the user data transmission channel to the second access network device.
  • the second access network device does not send a path switching request to the core network device, and/or the core network device does not send end indication information to the first access network device;
  • the path switching request refers to a request to switch the terminal-related data transmission path established between the core network device and the access network device to the second access network device, and the end indication information is used to send a request to the second access network device.
  • the first access network device instructs the core network device to stop providing terminal-related data packets to it.
  • the transceiver 126 is further configured to send mobility-related information of the terminal to the second access network device, where the mobility-related information is used to indicate the mobility state of the terminal.
  • the mobility-related information includes at least one of the following: a movement speed value of the terminal, and movement speed level information of the terminal.
  • the mobility-related information is included in a handover request sent by the first access network device to the second access network device, and the second information is included in the second access network device.
  • the handover request response sent by the network access device to the first access network device is included in the handover request response sent by the network access device to the first access network device.
  • the access network device 120 is the second access network device introduced in the above embodiment
  • the transceiver 126 is configured to send second information to the first access network device, where the second information is used to indicate a user data transmission channel that is not supported but not released by the second access network device.
  • the user data transmission channel includes at least one of the following: network slice, PDU session, DRB, QoS flow.
  • the second information includes at least one of the following: a PDU session resource list, a DRB list, and a QoS flow list.
  • the PDU session resource list includes at least one of the following: at least one network slice identifier, at least one PDU session identifier; the DRB list includes at least one DRB identifier; the QoS list includes at least one A QoS flow identifier.
  • data in the user data transmission channel is not transmitted between the terminal and the second access network device.
  • the second access network device provides the terminal with a data forwarding service for data packets related to the user data transmission channel.
  • the transceiver 126 is further configured to receive mobility-related information of the terminal from the first access network device, where the mobility-related information is used to indicate the mobility state of the terminal.
  • the mobility-related information includes at least one of the following: a movement speed value of the terminal, and movement speed level information of the terminal.
  • the mobility-related information is included in a handover request sent by the first access network device to the second access network device, and the second information is included in the second access network device.
  • the handover request response sent by the network access device to the first access network device is included in the handover request response sent by the network access device to the first access network device.
  • the second access network device does not send a path switching request to the core network device, and/or the core network device does not send end indication information to the first access network device;
  • the path switching request refers to a request to switch the terminal-related data transmission path established between the core network device and the access network device to the second access network device, and the end indication information is used to send a request to the second access network device.
  • the first access network device instructs the core network device to stop providing terminal-related data packets to it.
  • the transceiver 126 is further configured to receive data packets related to the user data transmission channel from the first access network device and/or the core network device;
  • the processor 121 is further configured to cache the data packets.
  • the transceiver 126 is further configured to send the buffered data packet to the third access network after the terminal switches from the second access network device to the third access network device access equipment.
  • the transceiver 126 is further configured to send a handover request to a third access network device, where the handover request includes a request for a user data transmission channel accepted by the third access network device, the The accepted user data transmission channel includes the user data transmission channel indicated by the second information.
  • the transceiver 126 is further configured to receive a handover request response from the third access network device, where the handover request response includes user data supported by the third access network device transmission channel; sending third information to the terminal, where the third information is used to indicate to the terminal a user data transmission channel supported by the third access network device.
  • the user data transmission channel supported by the third access network device includes: a user data transmission channel that is not supported but not released by the second access network device.
  • Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is used to be executed by a processor of a terminal, so as to implement the foregoing terminal-side switching method.
  • Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is configured to be executed by a processor of an access network device, so as to implement the above-mentioned first access network device side switching method.
  • Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the storage medium, and the computer program is configured to be executed by a processor of an access network device, so as to implement the above-mentioned second access network device side switching method.
  • An embodiment of the present application further provides a chip, where the chip includes a programmable logic circuit and/or program instructions, and when the chip runs on a terminal, it is used to implement the above-mentioned switching method on the terminal side.
  • An embodiment of the present application further provides a chip, where the chip includes a programmable logic circuit and/or program instructions, and when the chip runs on an access network device, it is used to implement the above-mentioned first access network device side switching method.
  • An embodiment of the present application further provides a chip, where the chip includes a programmable logic circuit and/or program instructions, and when the chip runs on an access network device, it is used to implement the second access network device side as described above. switching method.
  • the embodiment of the present application also provides a computer program product, which enables the terminal to execute the above-mentioned terminal-side switching method when the computer program product runs on the terminal.
  • the embodiment of the present application further provides a computer program product, which when the computer program product runs on the access network device, enables the access network device to execute the above-mentioned first access network device-side handover method.
  • the embodiment of the present application also provides a computer program product, which when the computer program product runs on the access network device, enables the access network device to execute the above-mentioned switching method on the side of the second access network device.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage medium can be any available medium that can be accessed by a general purpose or special purpose computer.

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

Abstract

La présente demande se rapporte au domaine technique des communications et concerne un procédé, un appareil et un dispositif de commutation, ainsi qu'un support de stockage. Le procédé comprend les étapes suivantes : un terminal reçoit des premières informations d'un premier dispositif de réseau d'accès, les premières informations servant à indiquer un canal de transmission de données utilisateur qu'un second dispositif de réseau d'accès ne prend pas en charge mais n'a pas besoin de libérer. Selon les solutions techniques fournies par les modes de réalisation de la présente demande, par rapport à un canal de transmission de données utilisateur qu'un dispositif de réseau d'accès cible ne prend pas en charge, en demandant à un terminal de ne pas libérer ledit canal de transmission de données utilisateur, le terminal ne libère pas un canal de transmission de données d'utilisateur auquel le dispositif de réseau d'accès cible ne peut pas fournir temporairement un service pendant la commutation de cellule dans le processus de mouvement rapide. Ensuite, lorsque le terminal se déplace dans une plage de couverture cellulaire dans laquelle un service associé audit canal de transmission de données utilisateur peut être fourni, le terminal n'a pas besoin d'initier à nouveau un processus de récupération associé audit canal de transmission de données utilisateur. Par conséquent, dans un aspect, la présente invention aide à réduire le surdébit de signalisation d'interface radio ; en même temps, dans un autre aspect, la présente invention aide également à améliorer la continuité de service.
PCT/CN2020/103609 2020-07-22 2020-07-22 Procédé, appareil et dispositif de commutation, et support de stockage Ceased WO2022016429A1 (fr)

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CN202080101504.6A CN115699870B (zh) 2020-07-22 2020-07-22 切换方法、装置、设备及存储介质

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WO2016116879A1 (fr) * 2015-01-22 2016-07-28 Nokia Technologies Oy Processus de récupération de synchronisation de temporisation de liaison montante
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