WO2024011545A1 - 切换方法及装置 - Google Patents

切换方法及装置 Download PDF

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Publication number
WO2024011545A1
WO2024011545A1 PCT/CN2022/105832 CN2022105832W WO2024011545A1 WO 2024011545 A1 WO2024011545 A1 WO 2024011545A1 CN 2022105832 W CN2022105832 W CN 2022105832W WO 2024011545 A1 WO2024011545 A1 WO 2024011545A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
target
configuration information
network device
relay terminal
Prior art date
Application number
PCT/CN2022/105832
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English (en)
French (fr)
Inventor
熊艺
杨星
Original Assignee
北京小米移动软件有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to PCT/CN2022/105832 priority Critical patent/WO2024011545A1/zh
Priority to CN202280002575.XA priority patent/CN117716734A/zh
Publication of WO2024011545A1 publication Critical patent/WO2024011545A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality

Definitions

  • This application relates to the field of communication technology, and in particular, to a switching method and device.
  • Relay technology means that the terminal device is not directly connected to the network device, but communicates with the network device through the relay of another terminal device.
  • a terminal device connected to a network device through another terminal device is called a remote terminal device, and a terminal device that provides a relay function is called a relay terminal device.
  • the direct connection between a terminal device and a network device is called a direct link, and the connection between a terminal device and a network device through a relay terminal device is called an indirect link.
  • the remote terminal device is supported to perform path switching between a direct link and an indirect link, and the network device communicating with the remote terminal device does not change.
  • the first embodiment of the present application provides a switching method, which is executed by a first terminal device.
  • the method includes:
  • path switching is performed based on the target relay terminal device.
  • the switching configuration information includes at least one of the following:
  • the identifier of the target relay terminal device The identifier of at least one target cell; the identifier of at least one target network device; and the identifier of the first terminal device.
  • performing path switching according to the switching configuration information includes:
  • a connection is established with the target relay terminal device.
  • the method also includes:
  • the method further includes:
  • a connection is established with the current serving network device of the target relay terminal device.
  • the method further includes at least one of the following: kind:
  • the switching configuration information includes at least one of the following: an identification of the target relay terminal device; an identification of at least one target cell; at least one The identification of the target network device; the identification of the first terminal device.
  • the handover configuration information is included in a radio resource control RRC message.
  • the identity of the at least one target cell and/or the identity of the at least one target network device is included in at least one of the following configuration information:
  • RRC reconfiguration sidelink SL path switching configuration
  • RRC synchronization reconfiguration cell group configuration
  • special cell spCell configuration special cell spCell configuration.
  • the second embodiment of the present application provides a handover method, which is executed by a first network device.
  • the method includes:
  • the switching configuration information is used to perform path switching based on the target relay terminal device.
  • the switching configuration information includes at least one of the following:
  • the identifier of the target relay terminal device The identifier of at least one target cell; the identifier of at least one target network device; and the identifier of the first terminal device.
  • the switching configuration information is used for establishing a connection between the first terminal device and the target relay terminal device.
  • the method also includes:
  • the switching configuration information includes at least one of the following: the target relay The identifier of the terminal device; the identifier of at least one target cell; the identifier of at least one target network device; the identifier of the first terminal device.
  • the method also includes:
  • the switching configuration information does not include any of the following information:
  • the identifier of the target relay terminal device The identifier of at least one target cell; the identifier of at least one target network device; and the identifier of the first terminal device.
  • the handover configuration information is included in a radio resource control RRC message.
  • the identity of the at least one target cell and/or the identity of the at least one target network device is included in at least one of the following configuration information:
  • RRC reconfiguration sidelink SL path switching configuration
  • RRC synchronization reconfiguration cell group configuration
  • special cell spCell configuration special cell spCell configuration.
  • the third embodiment of the present application provides a switching device, which is applied to a first terminal device.
  • the device includes:
  • a transceiver unit configured to receive switching configuration information sent by the first network device
  • a processing unit configured to perform path switching based on the target relay terminal device according to the switching configuration information.
  • the switching configuration information includes at least one of the following:
  • the identifier of the target relay terminal device The identifier of at least one target cell; the identifier of at least one target network device; and the identifier of the first terminal device.
  • processing unit is specifically used for:
  • a connection is established with the target relay terminal device.
  • the transceiver unit is also used to:
  • the processing unit is further configured to:
  • a connection is established with the current serving network device of the target relay terminal device.
  • the processing unit is further configured to: At least one:
  • the switching configuration information includes at least one of the following: an identification of the target relay terminal device; an identification of at least one target cell; at least one The identification of the target network device; the identification of the first terminal device.
  • the handover configuration information is included in a radio resource control RRC message.
  • the identity of the at least one target cell and/or the identity of the at least one target network device is included in at least one of the following configuration information:
  • RRC reconfiguration sidelink SL path switching configuration
  • RRC synchronization reconfiguration cell group configuration
  • special cell spCell configuration special cell spCell configuration.
  • the fourth embodiment of the present application provides a switching device, the device is applied to the first network device, and the device includes:
  • a transceiver unit configured to send switching configuration information to the first terminal device
  • the switching configuration information is used to perform path switching based on the target relay terminal device.
  • the switching configuration information includes at least one of the following:
  • the identifier of the target relay terminal device The identifier of at least one target cell; the identifier of at least one target network device; and the identifier of the first terminal device.
  • the switching configuration information is used for establishing a connection between the first terminal device and the target relay terminal device.
  • the device also includes:
  • a processing unit configured to, in response to the first terminal device to perform path switching, or in response to the first terminal device to perform switching to the indirect link, determine that the switching configuration information includes at least one of the following: The identifier of the target relay terminal device; the identifier of at least one target cell; the identifier of at least one target network device; and the identifier of the first terminal device.
  • the device also includes:
  • a processing unit configured to, in response to the first terminal device not performing path switching based on the target relay terminal device, determine that the switching configuration information does not include any of the following information:
  • the identifier of the target relay terminal device The identifier of at least one target cell; the identifier of at least one target network device; and the identifier of the first terminal device.
  • the handover configuration information is included in a radio resource control RRC message.
  • the identity of the at least one target cell and/or the identity of the at least one target network device is included in at least one of the following configuration information:
  • RRC reconfiguration sidelink SL path switching configuration
  • RRC synchronization reconfiguration cell group configuration
  • special cell spCell configuration special cell spCell configuration.
  • the fifth embodiment of the present application provides a communication device.
  • the device includes a processor and a memory.
  • a computer program is stored in the memory.
  • the processor executes the computer program stored in the memory so that the The device executes the switching method described in the embodiment of the first aspect.
  • the sixth embodiment of the present application provides a communication device.
  • the device includes a processor and a memory.
  • a computer program is stored in the memory.
  • the processor executes the computer program stored in the memory so that the The device executes the switching method described in the above embodiment of the second aspect.
  • the seventh embodiment of the present application provides a communication device.
  • the device includes a processor and an interface circuit.
  • the interface circuit is used to receive code instructions and transmit them to the processor.
  • the processor is used to run the code instructions to enable the The device executes the switching method described in the embodiment of the first aspect.
  • the eighth embodiment of the present application provides a communication device.
  • the device includes a processor and an interface circuit.
  • the interface circuit is used to receive code instructions and transmit them to the processor.
  • the processor is used to run the code instructions to enable the The device executes the switching method described in the above embodiment of the second aspect.
  • the ninth embodiment of the present application provides a computer-readable storage medium for storing instructions. When the instructions are executed, the switching method described in the first embodiment is implemented.
  • the tenth embodiment of the present application provides a computer-readable storage medium for storing instructions, and when the instructions are executed, the switching method described in the second embodiment is implemented.
  • the eleventh aspect embodiment of the present application provides a computer program that, when run on a computer, causes the computer to perform the switching method described in the first aspect embodiment.
  • the twelfth aspect embodiment of the present application provides a computer program that, when run on a computer, causes the computer to perform the switching method described in the second aspect embodiment.
  • the switching method and device provided by the embodiments of the present application receive switching configuration information sent by the first network device, and perform path switching based on the target relay terminal device according to the switching configuration information, so that the remote terminal device is connected to the target.
  • the relay terminal device When the relay terminal device establishes a connection, it can obtain the serving cell of the target relay terminal device and then perform path switching, which can effectively improve the success rate of path switching, reduce communication delay, and improve system communication efficiency.
  • Figure 1 is a schematic architectural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a switching method provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a switching method provided by an embodiment of the present application.
  • Figure 4 is a schematic flowchart of a switching method provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a switching method provided by an embodiment of the present application.
  • Figure 6 is a schematic flowchart of a switching method provided by an embodiment of the present application.
  • Figure 7a is a schematic flowchart of a switching method provided by an embodiment of the present application.
  • Figure 7b is a schematic diagram of an application scenario of a switching method provided by an embodiment of the present application.
  • Figure 8 is a schematic structural diagram of a switching device provided by an embodiment of the present application.
  • Figure 9 is a schematic structural diagram of a switching device provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another switching device provided by an embodiment of the present application.
  • Figure 11 is a schematic structural diagram of a chip provided by an embodiment of the present application.
  • first, second, third, etc. may be used to describe various information in the embodiments of this application, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other.
  • first information may also be called second information, and similarly, the second information may also be called first information.
  • the words "if” and “if” as used herein may be interpreted as "when” or "when” or “in response to determining.”
  • Figure 1 is a schematic architectural diagram of a communication system provided by an embodiment of the present application.
  • the communication system may include but is not limited to a first network device, a first terminal device, and a second terminal device.
  • the number and form of devices shown in Figure 1 are only for examples and do not constitute a limitation on the embodiments of the present application.
  • the application may include two or more network devices, two or more first terminal devices, and two or more second terminal devices.
  • the communication system shown in Figure 1 includes a network device 101, a first terminal device 102 and a second terminal device 103 as an example.
  • LTE Long Term Evolution
  • 5G new air interface system 5G new air interface system
  • other future new mobile communication systems 5G new air interface system
  • the network device 101 in the embodiment of this application is an entity on the network side that is used to transmit or receive signals.
  • the network device 101 may be an evolved base station (Evolved NodeB, eNB), a transmission point (Transmission Reception Point, TRP), a next generation base station (Next Generation NodeB, gNB) in an NR system, or other base stations in future mobile communication systems.
  • the embodiments of this application do not limit the specific technology and specific equipment form used by the network equipment.
  • the network equipment provided by the embodiments of this application may be composed of a centralized unit (Central Unit, CU) and a distributed unit (Distributed Unit, DU).
  • the CU may also be called a control unit (Control Unit), using CU-DU.
  • Control Unit Control Unit
  • the structure can separate the protocol layers of network equipment, such as base stations, and place some protocol layer functions under centralized control on the CU. The remaining part or all protocol layer functions are distributed in the DU, and the CU centrally controls the DU.
  • the first terminal device 102 and the second terminal device 103 in the embodiment of this application are entities on the user side that are used to receive or transmit signals, such as a mobile phone.
  • Terminal equipment can also be called terminal equipment (terminal), user equipment (user equipment, UE), mobile station (Mobile Station, MS), mobile terminal equipment (Mobile Terminal, MT), etc.
  • Terminal devices can be cars with communication functions, smart cars, mobile phones, wearable devices, tablets (Pad), computers with wireless transceiver functions, virtual reality (Virtual Reality, VR) terminal devices, augmented reality ( Augmented Reality (AR) terminal equipment, wireless terminal equipment in industrial control (Industrial Control), wireless terminal equipment in self-driving (Self-Driving), wireless terminal equipment in remote surgery (Remote Medical Surgery), smart grid ( Wireless terminal equipment in Smart Grid, wireless terminal equipment in Transportation Safety, wireless terminal equipment in Smart City, wireless terminal equipment in Smart Home, etc.
  • the embodiments of this application do not limit the specific technology and specific equipment form used by the terminal equipment.
  • Relay technology means that the first terminal device 102 is not directly connected to the network device 101, but communicates with the network device 101 through the relay of another terminal device (the second terminal device 103).
  • the first terminal device 102 is called a remote terminal device
  • the second terminal device 103 that provides the relay function is called a relay terminal device.
  • the direct connection between a terminal device and a network device is called a direct link
  • the connection between a terminal device and a network device through a relay terminal device is called an indirect link.
  • the remote terminal device is supported to perform path switching between a direct link and an indirect link, and the network device communicating with the remote terminal device does not change.
  • the synchronization reconfiguration includes the configuration of the path switching, regardless of whether there is a corresponding configuration of the target cell, because it does not involve
  • the remote UE connects through the relay UE, so the remote UE only performs path switching related processes by default.
  • the remote terminal device can support the following path switching scenarios:
  • gNB indirect-to-direct path switching Intra-gNB indirect-to-direct path switching, that is, “remote UE ⁇ ->relay UE A ⁇ ->gNB X” to “remote UE ⁇ - >gNB X”;
  • Intra-gNB direct-to-indirect path switching Intra-gNB direct-to-indirect path switching
  • Remote UE ⁇ ->gNB X to "remote UE ⁇ ->relay UE A ⁇ - >gNB X”
  • D.gNB indirect-to-direct path switching Inter-gNB indirect-to-direct path switching
  • Inter-gNB direct-to-indirect path switching that is, "remote UE ⁇ ->gNB X" to "remote UE ⁇ ->relay UE A ⁇ - >gNB Y”;
  • the network device connected to the remote terminal device may change.
  • the remote terminal equipment Since in the related technology, the path switching process of the remote terminal equipment does not involve changes in network equipment, the remote terminal equipment does not know the target cell before accessing the relay terminal equipment.
  • inter-gNB path handover may be involved. That is, when the remote terminal device switches to the relay terminal device, the cell connected to the relay terminal device may change. The subsequent cells may not be the target cells for which resources are reserved for the remote terminal equipment. In this case, the connection to the remote end device may fail.
  • Figure 2 is a schematic flowchart of a switching method provided by an embodiment of the present application. It should be noted that the switching method in the embodiment of the present application is executed by the first terminal device. This method can be executed independently or in conjunction with any other embodiment of the present application. As shown in Figure 2, the method may include but is not limited to the following steps:
  • Step 201 Receive handover configuration information sent by the first network device.
  • the first terminal device can receive the handover configuration information sent by the first network device.
  • the first network device is a source network device (source node), and the first terminal device performs path switching according to the received switching configuration information sent by the source network device.
  • the first terminal device is a remote terminal device or a potential remote terminal device.
  • the first terminal device can be directly or indirectly connected to the first network device (source network device). That is, the first terminal device can be directly connected to the source network device or through a first relay.
  • the end device connects to the source network device.
  • the first terminal device may directly receive the switching configuration information sent by the first network device, or may receive the switching configuration information sent by the first network device through a first relay terminal device.
  • the handover configuration information includes at least one of the following information:
  • the identification of the target relay terminal equipment the identification of at least one target cell, the identification of at least one target network equipment, and the identification of the first terminal equipment.
  • the switching configuration information in response to the path switching of the first terminal device being switched to an indirect link (indirect, which may also be called an indirect connection), includes at least one of the above information.
  • the at least one target cell corresponds to the target relay terminal device, and the at least one target cell may be a serving cell available to the target relay terminal device, that is, the at least one target cell is the first terminal device through the At least one cell that the target relay terminal device can access.
  • the at least one target network device corresponds to the target relay terminal device
  • the at least one target network device may be a service network device available to the target relay terminal device, that is, the at least one The target network device is at least one network device that the first terminal device can access through the target relay terminal device.
  • the target relay terminal device may be a U2N (UE to Network, user equipment to network) relay terminal device, or may be a U2U (UE to UE, user equipment to user equipment) relay terminal device.
  • U2N UE to Network, user equipment to network
  • U2U UE to UE, user equipment to user equipment
  • the at least one target network device may include the first network device.
  • the first terminal device may receive the handover configuration information by receiving a Radio Resource Control (Radio Resource Control, RRC) message. That is, the handover configuration information may be included in the RRC message.
  • RRC Radio Resource Control
  • the RRC message may be RRC reconfiguration.
  • the identity of at least one target cell and/or the identity of at least one target network device in the handover configuration information may be included in at least one of the following configuration information:
  • RRC reconfiguration sidelink SL (sidelink) path switching configuration
  • RRC synchronization reconfiguration cell group configuration
  • special cell spCell special Cell
  • spCell is the primary cell PCell (Primary Cell) and the primary and secondary cells PSCell (Primary Secondary Cell).
  • Step 202 According to the switching configuration information, perform path switching based on the target relay terminal device.
  • the first terminal device after receiving the switching configuration information, the first terminal device can perform path switching based on the target relay terminal device.
  • the first terminal device after receiving the handover configuration information, can establish a connection with the target relay terminal device according to the handover configuration information.
  • connection between the first terminal device and the target relay terminal device is established through PC5 (underlying direct-connect cellular communication protocol interface).
  • PC5 underlying direct-connect cellular communication protocol interface
  • the identity of the first terminal device in the handover configuration information may be used as a Cell-Radio Network Temporary Identifier (C-RNTI).
  • C-RNTI Cell-Radio Network Temporary Identifier
  • the first terminal device can also obtain the current serving cell and/or the current serving network device of the target relay terminal device.
  • the first terminal device can obtain the current serving cell of the target relay terminal device.
  • the first terminal device can obtain the current serving network device of the target relay terminal device.
  • the first terminal device can obtain the current serving cell and current serving network device of the target relay terminal device.
  • the first terminal device may directly obtain the current serving cell and/or the current serving network device of the target relay terminal device without establishing a connection with the target relay terminal device. It is also possible to establish a connection with the target relay terminal device and obtain the current serving cell and/or the current serving network device of the target relay terminal device.
  • the first terminal device can determine the target based on the target cell and/or target network device in the handover configuration information. Whether the current serving cell and/or serving network device of the relay terminal device is the target cell and/or target network device configured by the source network device.
  • the first terminal device can communicate with the target relay terminal device through the target relay terminal device.
  • the current service network device establishes a connection.
  • the first terminal device can perform at least one of the following behaviors:
  • the reason why the first terminal device initiates RRC connection reestablishment may be a path switching failure.
  • the current serving cell of the target relay terminal device corresponds to the current serving network device
  • the target cell and the target network device in the handover configuration information also correspond. If at least one target cell in the handover configuration information includes the current serving cell, if the handover configuration information also includes at least one target network device, the at least one target network device will also include the current serving network device. Similarly, if at least one target network device in the handover configuration information includes the current serving network device, then in the case where the handover configuration information also includes at least one target cell, the at least one target cell will also include the current serving network device. Service community.
  • the handover configuration information includes at least one target cell and at least one target network device
  • the first terminal device can confirm whether the current serving cell and/or serving network device of the target relay terminal device are Configured for the source network device. If so, a connection can be established with the current serving network device of the target relay terminal device through the target relay terminal device, and the current serving cell of the target relay terminal device can be accessed. If not, you can directly initiate RRC connection reestablishment, or enter the idle state, or fall back to the connection before the path switch (that is, restore the connection with the first network device, which can be a direct connection or an indirect connection) , or enter the idle state and perform cell reselection.
  • the remote terminal device can obtain the target when establishing a connection with the target relay terminal device. Relaying the serving cell of the terminal device and then performing path switching can effectively improve the success rate of path switching, reduce communication delay, and improve system communication efficiency.
  • Figure 3 is a schematic flowchart of a switching method provided by an embodiment of the present application. It should be noted that the switching method in the embodiment of the present application is executed by the first terminal device. This method can be executed independently or in conjunction with any other embodiment of the present application. As shown in Figure 3, the method may include but is not limited to the following steps:
  • Step 301 Receive handover configuration information sent by the first network device.
  • the first terminal device can receive the handover configuration information sent by the first network device.
  • the switching configuration information includes at least one of the following information:
  • the identification of the target relay terminal equipment the identification of at least one target cell, the identification of at least one target network equipment, and the identification of the first terminal equipment.
  • the first network device is a source network device, and the first terminal device performs path switching according to the received switching configuration information sent by the source network device.
  • the first terminal device can be connected to the first network device (source network device) directly or indirectly, that is, the first terminal device can be connected to the source network device directly or through a relay terminal device. Connect to the source network device.
  • the first terminal device may directly receive the switching configuration information sent by the first network device, or may receive the switching configuration information sent by the first network device through a first relay terminal device.
  • the switching configuration information in response to the path switching of the first terminal device being switched to an indirect link (indirect, which may also be called an indirect connection), includes at least one of the above information.
  • the at least one target cell corresponds to the target relay terminal device, and the at least one target cell may be a serving cell available to the target relay terminal device, that is, the at least one target cell is the first terminal device through the At least one cell that the target relay terminal device can access.
  • the at least one target network device corresponds to the target relay terminal device
  • the at least one target network device may be a service network device available to the target relay terminal device, that is, the at least one target
  • the network device is at least one network device that the first terminal device can access through the target relay terminal device.
  • the at least one target network device may include the first network device.
  • the first terminal device may receive the handover configuration information by receiving an RRC message. That is, the handover configuration information may be included in the RRC message.
  • the RRC message may be RRC reconfiguration.
  • the identity of at least one target cell and/or the identity of at least one target network device in the handover configuration information may be included in at least one of the following configuration information:
  • RRC reconfiguration sidelink SL path switching configuration
  • RRC synchronization reconfiguration cell group configuration
  • special cell spCell configuration special cell spCell configuration.
  • Step 302 Establish a connection with the target relay terminal device according to the handover configuration information.
  • the first terminal device after receiving the handover configuration information, can establish a connection with the target relay terminal device according to the handover configuration information.
  • connection between the first terminal device and the target relay terminal device is established through the PC5 interface.
  • the identity of the first terminal device in the handover configuration information may be used as the C-RNTI.
  • the method may further include:
  • Step 303 Obtain the current serving cell and/or the current serving network device of the target relay terminal device.
  • the first terminal device can obtain the current serving cell of the target relay terminal device.
  • the first terminal device can obtain the current serving network device of the target relay terminal device.
  • the first terminal device can obtain the current serving cell and current serving network device of the target relay terminal device.
  • the first terminal device may directly obtain the current serving cell and/or the current serving network device of the target relay terminal device without establishing a connection with the target relay terminal device. It is also possible to establish a connection with the target relay terminal device and obtain the current serving cell and/or the current serving network device of the target relay terminal device.
  • Step 304 Confirm whether at least one target cell in the handover configuration information includes the current serving cell, and/or whether at least one target network device in the handover configuration information includes the current serving network device.
  • step 305 is executed; if at least one target cell does not include the current serving cell, and/or, at least one If the target network device does not include the current serving network device, at least one of steps 306 to 310 is performed.
  • the current serving cell of the target relay terminal device corresponds to the current serving network device
  • the target cell and the target network device in the handover configuration information also correspond. If at least one target cell in the handover configuration information includes the current serving cell, if the handover configuration information also includes at least one target network device, the at least one target network device will also include the current serving network device. Similarly, if at least one target network device in the handover configuration information includes the current serving network device, then in the case where the handover configuration information also includes at least one target cell, the at least one target cell will also include the current serving network device. Service community.
  • the handover configuration information includes at least one target cell and at least one target network device
  • step 305 is executed; if the first terminal device confirms that at least one target cell does not include the current serving cell. , then at least one of steps 306 to 310 is performed.
  • step 305 is executed; if the first terminal device confirms that at least one target network device does not include the current service If the network device is a network device, perform at least one of steps 306 to 310.
  • step 305 is executed; if the first terminal device confirms If at least one target cell does not include the current serving cell, and at least one target network device does not include the current serving network device, then at least one of steps 306 to 310 is performed.
  • Step 305 Establish a connection with the current serving network device of the target relay terminal device through the target relay terminal device.
  • the first terminal device if it confirms that the current serving cell and/or serving network device of the target relay terminal device is configured by the source network device, it can communicate with the target through the target relay terminal device.
  • the relay terminal device establishes a connection with the current serving network device and accesses the current serving cell of the target relay terminal device.
  • Step 306 Initiate radio resource control RRC connection reestablishment.
  • the first terminal device if it confirms that the current serving cell and/or serving network device of the target relay terminal device are not configured by the source network device, it can directly initiate RRC connection reestablishment.
  • the reason why the first terminal device initiates RRC connection reestablishment may be a path switching failure.
  • Step 307 Disconnect the connection with the target relay terminal device.
  • the first terminal device confirms that the current serving cell and/or serving network device of the target relay terminal device are not configured by the source network device, and may also disconnect from the target relay terminal device.
  • Step 308 Restore the connection with the first network device.
  • the first terminal device confirms that the current serving cell and/or serving network device of the target relay terminal device are not configured by the source network device, and can also restore the connection with the first network device, that is, return Return to the connection before Lu Qing switched.
  • Step 309 enter the idle state.
  • the first terminal device confirms that the current serving cell and/or serving network device of the target relay terminal device are not configured by the source network device, and may also directly enter the idle state.
  • Step 310 Initiate cell reselection.
  • the first terminal device confirms that the current serving cell and/or serving network device of the target relay terminal device are not configured by the source network device, and may also initiate cell reselection.
  • steps 303-310 may be performed after steps 301 and 302, or may be performed independently of steps 301 and 302.
  • the first terminal device in response to the first terminal device establishing a connection with the target relay terminal device, the first terminal device may perform some of steps 303 to 310.
  • the target relay terminal device by receiving the handover configuration information sent by the first network device, establishing a connection with the target relay terminal device according to the handover configuration information, obtaining the current serving cell and/or the current serving network device of the target relay terminal device, and confirming Whether at least one target cell in the handover configuration information includes the current serving cell, and/or whether at least one target network device in the handover configuration information includes the current serving network device, if so, through the target relay terminal device, and The target relay terminal device establishes a connection with the current serving network device.
  • Figure 4 is a schematic flowchart of a switching method provided by an embodiment of the present application. It should be noted that the switching method in this embodiment of the present application is executed by the first network device. This method can be executed independently or in conjunction with any other embodiment of the present application. As shown in Figure 4, the method may include but is not limited to the following steps:
  • Step 401 Send switching configuration information to the first terminal device, where the switching configuration information is used to perform path switching based on the target relay terminal device.
  • the first network device can send switching configuration information to the first terminal device.
  • the first network device is a source network device (source node), and the first terminal device performs path switching according to the received switching configuration information sent by the source network device.
  • the first terminal device can be connected to the first network device (source network device) directly or indirectly, that is, the first terminal device can be connected to the source network device directly or through a relay terminal device. Connect to the source network device.
  • the first network device may directly send the switching configuration information to the first terminal device, or may send the switching configuration information to the first terminal device through a relay terminal device.
  • the handover configuration information includes at least one of the following information:
  • the identification of the target relay terminal equipment the identification of at least one target cell, the identification of at least one target network equipment, and the identification of the first terminal equipment.
  • the switching configuration information is determined in response to the first terminal device to perform path switching, or in response to the first terminal device to perform switching to an indirect link (indirect, which may also be called an indirect connection). Include at least one of the above information.
  • the switching configuration information does not include any of the above information. That is, if the first terminal device does not perform path switching based on the target relay terminal device, the above field does not exist in the switching configuration information.
  • the at least one target cell corresponds to the target relay terminal device, and the at least one target cell may be a serving cell available to the target relay terminal device, that is, the at least one target cell is the first terminal device through the At least one cell that the target relay terminal device can access.
  • the at least one target network device corresponds to the target relay terminal device
  • the at least one target network device may be a service network device available to the target relay terminal device, that is, the at least one The target network device is at least one network device that the first terminal device can access through the target relay terminal device.
  • the target relay terminal device may be a U2N relay terminal device or a U2U relay terminal device.
  • the first network device may send the handover configuration information by sending an RRC message to the first terminal device. That is, the handover configuration information may be included in the RRC message.
  • the RRC message may be RRC reconfiguration.
  • the identity of at least one target cell and/or the identity of at least one target network device in the handover configuration information may be included in at least one of the following configuration information:
  • RRC reconfiguration sidelink SL (sidelink) path switching configuration
  • RRC synchronization reconfiguration cell group configuration
  • special cell spCell configuration special cell spCell configuration.
  • the first network device before sending the handover configuration information to the first terminal device, can send request information to the target cell and/or the target network device configured in the handover configuration information, requesting the target cell and/or the target network device. Or the target network device accepts the handover of the remote terminal device and prepares for the handover of the remote terminal device.
  • the first network device may add the target cell and/or the target network device to the handover configuration information. . If the target cell and/or target network device rejects the request, the first network device may delete the target cell and/or target network device that rejects the request from the handover configuration information.
  • the switching configuration information is used to perform path switching based on the target relay terminal device.
  • the first terminal device can perform path switching based on the target relay terminal device.
  • the handover configuration information is used for the first terminal device to establish a connection with the target relay terminal device. After receiving the handover configuration information, the first terminal device can establish a connection with the target relay terminal device according to the handover configuration information.
  • connection between the first terminal device and the target relay terminal device may be established based on the PC5 interface.
  • the switching configuration information is used to perform path switching based on the target relay terminal device, so that the remote terminal device can obtain the target when establishing a connection with the target relay terminal device. Relaying the serving cell of the terminal device and then performing path switching can effectively improve the success rate of path switching, reduce communication delay, and improve system communication efficiency.
  • Figure 5 is a schematic flowchart of a switching method provided by an embodiment of the present application. It should be noted that the switching method in this embodiment of the present application is executed by the first network device. This method can be executed independently or in conjunction with any other embodiment of the present application. As shown in Figure 5, the method may include but is not limited to the following steps:
  • Step 501 In response to the first terminal device to perform path switching, or in response to the first terminal device to perform switching to the indirect link, determine the switching configuration information.
  • the switching configuration information includes at least one of the following information (fields):
  • the identification of the target relay terminal equipment the identification of at least one target cell, the identification of at least one target network equipment, and the identification of the first terminal equipment.
  • the switching configuration information includes at least one of the following information (fields):
  • the identification of the target relay terminal equipment the identification of at least one target cell, the identification of at least one target network equipment, and the identification of the first terminal equipment.
  • the above-mentioned fields related to path switching exist conditionally, that is, only the first network device (source network device) determines that the first terminal device is to perform path switching, or that the switching is to be performed. Only when there is an indirect link, the above fields will be configured in the handover configuration information.
  • the first terminal device is to perform switching to the indirect link, which may include at least one of the following situations:
  • connection with the relay terminal device A is switched to the connection with the relay terminal device B, and the connected network device is changed.
  • the attribute of at least one of the above fields may be optional or necessary (mandatory).
  • the switching configuration information in response to the first terminal device not performing path switching based on the target relay terminal device, at least one of the above fields does not exist, that is, the switching configuration information does not include any of the following information:
  • the identification of the target relay terminal equipment the identification of at least one target cell, the identification of at least one target network equipment, and the identification of the first terminal equipment.
  • the at least one target cell corresponds to the target relay terminal device, and the at least one target cell may be a serving cell available to the target relay terminal device, that is, the at least one target cell is the first terminal device through the At least one cell that the target relay terminal device can access.
  • the at least one target network device corresponds to the target relay terminal device
  • the at least one target network device may be a service network device available to the target relay terminal device, that is, the at least one target
  • the network device is at least one network device that the first terminal device can access through the target relay terminal device.
  • Step 502 Send the switching configuration information to the first terminal device, where the switching configuration information is used to perform path switching based on the target relay terminal device.
  • the first network device can send the handover configuration information to the first terminal device.
  • the first terminal device can be connected to the first network device (source network device) directly or indirectly, that is, the first terminal device can be connected to the source network device directly or through a relay terminal device. Connect to the source network device.
  • the first network device may directly send the switching configuration information to the first terminal device, or may send the switching configuration information to the first terminal device through a relay terminal device.
  • the handover configuration information includes at least one of the following information:
  • the identification of the target relay terminal equipment the identification of at least one target cell, the identification of at least one target network equipment, and the identification of the first terminal equipment.
  • the target relay terminal device may be a U2N relay terminal device or a U2U relay terminal device.
  • the first network device may send the handover configuration information by sending an RRC message to the first terminal device. That is, the handover configuration information may be included in the RRC message.
  • the RRC message may be RRC reconfiguration.
  • the identity of at least one target cell and/or the identity of at least one target network device in the handover configuration information may be included in at least one of the following configuration information:
  • RRC reconfiguration sidelink SL path switching configuration
  • RRC synchronization reconfiguration cell group configuration
  • special cell spCell configuration special cell spCell configuration.
  • the switching configuration information is used to perform path switching based on the target relay terminal device.
  • the first terminal device can perform path switching based on the target relay terminal device.
  • the handover configuration information is used for the first terminal device to establish a connection with the target relay terminal device. After receiving the handover configuration information, the first terminal device can establish a connection with the target relay terminal device according to the handover configuration information.
  • connection between the first terminal device and the target relay terminal device may be established based on the PC5 interface.
  • the switching configuration by responding to the first terminal device to perform path switching, or in response to the first terminal device to perform switching to the indirect link, determining the switching configuration information, and sending the switching configuration information to the first terminal device, the switching configuration The information is used to perform path switching based on the target relay terminal device, so that the remote terminal device can obtain the serving cell of the target relay terminal device when establishing a connection with the target relay terminal device, and then perform path switching, which can effectively improve The success rate of path switching reduces communication delay and improves system communication efficiency.
  • Figure 6 is a schematic flowchart of a switching method provided by an embodiment of the present application. It should be noted that the switching method in the embodiment of the present application is executed by the target relay terminal device. This method can be executed independently or in conjunction with any other embodiment of the present application. As shown in Figure 6, the method may include one or more of the following steps: Step 601: Receive a sidelink SL connection establishment request sent by the first terminal device.
  • the target relay terminal device can receive the sidelink sidelink connection establishment request sent by the first terminal device, and establish a sidelink connection with the first terminal device.
  • connection establishment request may include the identification of the first terminal device.
  • the target relay terminal device After receiving the connection establishment request sent by the first terminal device, the target relay terminal device can establish a connection with the first terminal device according to the identification of the first terminal device included therein.
  • Step 602 Send a sidelink SL connection establishment response to the first terminal device.
  • the target relay terminal device after receiving the connection establishment request sent by the first terminal device, can accept the request, establish a sidelink connection with the first terminal device, and send the connection to the first terminal device. Create a response message for the request.
  • connection between the first terminal device and the target relay terminal device may be established based on the PC5 interface.
  • Step 603 Send the current serving cell and/or serving network device of the target relay terminal device to the first terminal device.
  • the target relay terminal device after the target relay terminal device establishes a connection with the first terminal device, it can interact with the first terminal device, and the first terminal device can obtain the current serving cell of the target relay terminal device. and/or service network equipment.
  • the sending of the current serving cell and/or the serving network device to the first terminal device as described in the embodiment of the present application may be directly sending the identity of the serving cell and/or the identity of the serving network device, or It may be through other signaling interactions that the first terminal device obtains the serving cell and/or the serving network device instead of directly sending the information of the serving cell and/or the serving network device.
  • the embodiments of the present application do not limit this.
  • the first terminal device can disconnect from the target relay terminal device. Following the connection of the terminal device.
  • connection establishment message sent by the first terminal equipment by receiving the connection establishment message sent by the first terminal equipment, sending a sidelink SL connection establishment response to the first terminal equipment, and sending the current serving cell and/or service of the target relay terminal equipment to the first terminal equipment.
  • the network equipment enables the remote terminal device to obtain the serving cell of the target relay terminal device when establishing a connection with the target relay terminal device, and then perform path switching, which can effectively improve the success rate of path switching and reduce communication delay. Improve system communication efficiency.
  • Figure 7a is a schematic flowchart of a switching method provided by an embodiment of the present application. This method can be executed independently or in conjunction with any other embodiment of the present application. As shown in Figure 7a, the method may include one or more of the following steps:
  • Any step in this embodiment can be executed alone or together with other steps.
  • the execution order of the following steps is not limited by this application, and any combination and execution method is within the scope of protection of this application.
  • the application scenario of the switching method described in each embodiment of the present application may be as shown in Figure 7b.
  • the first network device sends handover configuration information to the first terminal device.
  • the handover configuration information includes at least one of the following information: an identifier of the target relay terminal device, an identifier of at least one target cell, and at least one target network.
  • the identifier of the device target node
  • the identifier of the first terminal device is not limited to the following information: an identifier of the target relay terminal device, an identifier of at least one target cell, and at least one target network.
  • connection between the first network device and the first terminal device may be direct or indirect (connected through a relay).
  • the at least one target network device may include the first network device.
  • the at least one target cell corresponds to the target relay terminal equipment, and the at least one target cell may be a serving cell available to the target relay terminal equipment, that is, the at least one target cell is the first At least one cell that the terminal device can access through the target relay.
  • the at least one target network device corresponds to the target relay terminal device, and the at least one target network device may be a service network device available to the target relay terminal device, that is, the at least one The target network device is at least one network device that the first terminal device can access through the target relay terminal device.
  • the target relay terminal device may be a U2N relay terminal device or a U2U relay terminal device.
  • the above-mentioned network device may be a gNB.
  • the first network device may send the handover configuration information by sending an RRC message to the first terminal device. That is, the handover configuration information may be included in the RRC message.
  • the RRC message may be RRC reconfiguration.
  • the identity of at least one target cell and/or the identity of at least one target network device in the handover configuration information may be included in at least one of the following configuration information:
  • RRC reconfiguration sidelink SL path switching configuration
  • RRC synchronization reconfiguration cell group configuration
  • special cell spCell configuration special cell spCell configuration.
  • At least one of the above-mentioned information (fields related to path switching) included in the switching configuration information exists conditionally, that is, only the first network device (source network device) determines that the first terminal
  • the above fields will be configured in the switching configuration information only when the device is to perform path switching or switch to an indirect link.
  • the first terminal device is to perform switching to the indirect link, which may include at least one of the following situations:
  • connection with the relay terminal device A is switched to the connection with the relay terminal device B, and the connected network device gNB is changed.
  • the attributes of the at least one field mentioned above may be optional or necessary (mandatory).
  • the switching configuration information in response to the first terminal device not performing path switching based on the target relay terminal device, at least one of the above fields does not exist, that is, the switching configuration information does not include any of the following information:
  • the identification of the target relay terminal equipment, at least one target cell, at least one target network equipment, and the identification of the first terminal equipment is the identification of the target relay terminal equipment.
  • the first terminal device After receiving the handover configuration information sent by the first network device, the first terminal device can establish a connection with the target relay terminal device according to the handover configuration information.
  • connection is established based on the PC5 communication interface.
  • the identity of the first terminal device in the handover configuration information may be used as the C-RNTI.
  • the first terminal device can obtain the current serving cell and/or serving network device of the target relay terminal device, and confirm whether the current serving cell and/or serving network device are included in the handover configuration information. in the target cell and/or target network equipment.
  • the first terminal device if the current serving cell and/or serving network device of the relay terminal device is included in the handover configuration information, the first terminal device establishes a connection with the current serving network device through the target relay terminal device. Connect and access the current serving cell of the target relay terminal device.
  • the first terminal device can directly initiate RRC connection reestablishment, or enter the idle state, or return to the idle state. Return to the connection before the path switching, or enter the idle state and perform cell reselection.
  • the reason for the RRC connection reestablishment may be path switching failure.
  • the present application also provides a switching device. Since the switching device provided by the embodiments of the present application corresponds to the methods provided by the above-mentioned embodiments, the implementation of the switching method It is also applicable to the switching device provided in the following embodiments, and will not be described in detail in the following embodiments.
  • FIG. 8 is a schematic structural diagram of a switching device provided by an embodiment of the present application.
  • the switching device 800 includes: a transceiver unit 810 and a processing unit 820, wherein:
  • Transceiver unit 810 configured to receive switching configuration information sent by the first network device
  • the processing unit 820 is configured to perform path switching based on the target relay terminal device according to the switching configuration information.
  • the handover configuration information includes at least one of the following information:
  • the identifier of the first terminal device is the identifier of the first terminal device.
  • processing unit 820 is specifically used to:
  • a connection is established with the target relay terminal device.
  • the transceiver unit 810 is also used for:
  • the processing unit 820 is further configured to:
  • the processing unit 820 is further configured to at least one of the following:
  • the switching configuration information includes the at least one information.
  • the handover configuration information is included in a radio resource control RRC message.
  • the identity of the at least one target cell and/or the identity of the at least one target network device is included in at least one of the following configuration information:
  • RRC reconfiguration sidelink SL path switching configuration
  • RRC synchronization reconfiguration cell group configuration
  • special cell spCell configuration special cell spCell configuration.
  • the switching device of this embodiment can receive switching configuration information sent by the first network device, and perform path switching based on the target relay terminal device according to the switching configuration information, so that the remote terminal device establishes a connection with the target relay terminal device. At this time, the serving cell of the target relay terminal device can be obtained, and then the path switching is performed, which can effectively improve the success rate of path switching, reduce communication delay, and improve the communication efficiency of the system.
  • FIG. 9 is a schematic structural diagram of a switching device provided by an embodiment of the present application.
  • the switching device 900 includes: a transceiver unit 910, wherein:
  • Transceiver unit 910 configured to send switching configuration information to the first terminal device
  • the switching configuration information is used to perform path switching based on the target relay terminal device.
  • the handover configuration information includes at least one of the following information:
  • the identifier of the first terminal device is the identifier of the first terminal device.
  • the switching configuration information is used to establish a connection between the first terminal device and the target relay terminal device.
  • the device also includes:
  • a processing unit (not shown in the figure), configured to respond to the first terminal device to perform path switching, or in response to the first terminal device to perform switching to the indirect link, determine that the switching configuration information includes the at least one kind of information.
  • the device also includes:
  • a processing unit (not shown in the figure), configured to respond to the first terminal device not performing path switching based on the target relay terminal device, and determine that the switching configuration information does not include any of the following information:
  • the identifier of the first terminal device is the identifier of the first terminal device.
  • the handover configuration information is included in the online resource control RRC message.
  • the identity of the at least one target cell and/or the identity of the at least one target network device is included in at least one of the following configuration information:
  • RRC reconfiguration sidelink SL path switching configuration
  • RRC synchronization reconfiguration cell group configuration
  • special cell spCell configuration special cell spCell configuration.
  • the switching device of this embodiment can send switching configuration information to the first terminal device.
  • the switching configuration information is used to perform path switching based on the target relay terminal device, so that the remote terminal device establishes a connection with the target relay terminal device.
  • the serving cell of the target relay terminal device can be obtained, and then the path switching is performed, which can effectively improve the success rate of path switching, reduce communication delay, and improve the communication efficiency of the system.
  • embodiments of the present application also provide a communication device, including: a processor and a memory.
  • a computer program is stored in the memory.
  • the processor executes the computer program stored in the memory, so that the device executes the steps shown in Figure 2 to The method shown in the embodiment of Figure 3, or the method shown in the embodiment of Figure 5 is executed.
  • embodiments of the present application also provide a communication device, including: a processor and a memory.
  • a computer program is stored in the memory.
  • the processor executes the computer program stored in the memory, so that the device executes the steps shown in Figure 4 to The method shown in the embodiment of Figure 5.
  • embodiments of the present application also provide a communication device, including: a processor and an interface circuit.
  • the interface circuit is used to receive code instructions and transmit them to the processor.
  • the processor is used to run the code instructions to The method shown in the embodiment of FIG. 2 to FIG. 3 is executed.
  • embodiments of the present application also provide a communication device, including: a processor and an interface circuit.
  • the interface circuit is used to receive code instructions and transmit them to the processor.
  • the processor is used to run the code instructions to The method shown in the embodiment of FIG. 4 to FIG. 5 is executed.
  • FIG. 10 is a schematic structural diagram of another switching device provided by an embodiment of the present application.
  • the switching device 1000 may be a network device, a terminal device, a chip, a chip system, or a processor that supports a network device to implement the above method, or a chip, a chip system, or a processor that supports a terminal device to implement the above method. Processor etc.
  • the device can be used to implement the method described in the above method embodiment. For details, please refer to the description in the above method embodiment.
  • Switching device 1000 may include one or more processors 1001.
  • the processor 1001 may be a general-purpose processor or a special-purpose processor, or the like. For example, it can be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data.
  • the central processor can be used to control switching devices (such as base stations, baseband chips, terminal equipment, terminal equipment chips, DU or CU, etc.) and execute computer programs. , processing data for computer programs.
  • the switching device 1000 may also include one or more memories 1002, on which a computer program 1003 may be stored.
  • the processor 1001 executes the computer program 1003, so that the switching device 1000 executes the method described in the above method embodiment.
  • the computer program 1003 may be solidified in the processor 1001, in which case the processor 1001 may be implemented by hardware.
  • the memory 1002 may also store data.
  • the switching device 1000 and the memory 1002 can be provided separately or integrated together.
  • the switching device 1000 may also include a transceiver 1005 and an antenna 1006.
  • the transceiver 1005 may be called a transceiver unit, a transceiver, a transceiver circuit, etc., and is used to implement transceiver functions.
  • the transceiver 1005 may include a receiver and a transmitter.
  • the receiver may be called a receiver or a receiving circuit, etc., used to implement the receiving function;
  • the transmitter may be called a transmitter, a transmitting circuit, etc., used to implement the transmitting function.
  • the switching device 1000 may also include one or more interface circuits 1007.
  • the interface circuit 1007 is used to receive code instructions and transmit them to the processor 1001 .
  • the processor 1001 executes code instructions to cause the switching device 1000 to perform the method described in the above method embodiment.
  • the processor 1001 may include a transceiver for implementing receiving and transmitting functions.
  • the transceiver may be a transceiver circuit, an interface, or an interface circuit.
  • the transceiver circuits, interfaces or interface circuits used to implement the receiving and transmitting functions can be separate or integrated together.
  • the above-mentioned transceiver circuit, interface or interface circuit can be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit can be used for signal transmission or transfer.
  • the switching device 1000 may include a circuit, and the circuit may implement the sending or receiving or communication functions in the foregoing method embodiments.
  • the processor and transceiver described in this application can be implemented in integrated circuits (ICs), analog ICs, radio frequency integrated circuits RFICs, mixed signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuit board (PCB), electronic equipment, etc.
  • the processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), n-type metal oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
  • CMOS complementary metal oxide semiconductor
  • NMOS n-type metal oxide-semiconductor
  • PMOS P-type Metal oxide semiconductor
  • BJT bipolar junction transistor
  • BiCMOS bipolar CMOS
  • SiGe silicon germanium
  • GaAs gallium arsenide
  • the switching device described in the above embodiments may be a network device or a terminal device, but the scope of the switching device described in this application is not limited thereto, and the structure of the switching device may not be limited by Figures 8-9.
  • the switching device may be a stand-alone device or may be part of a larger device.
  • the switching device can be:
  • the IC collection may also include storage components for storing data and computer programs;
  • the switching device can be a chip or a chip system
  • the schematic structural diagram of the chip shown in FIG. 11 refer to the schematic structural diagram of the chip shown in FIG. 11 .
  • the chip shown in Figure 11 includes a processor 1101 and an interface 1102.
  • the number of processors 1101 may be one or more, and the number of interfaces 1102 may be multiple.
  • Interface 1102 for code instructions and transmission to the processor
  • the processor 1101 is used to run code instructions to perform the methods shown in Figures 2 to 3.
  • Interface 1102 for code instructions and transmission to the processor
  • the processor 1101 is configured to run code instructions to perform the methods shown in Figures 4 to 5.
  • the chip also includes a memory 1103, which is used to store necessary computer programs and data.
  • Embodiments of the present application also provide a communication system.
  • the system includes a switching device as a terminal device and a switching device as a network device in the embodiment of FIG. 8-9.
  • the system includes a switching device as a terminal in the embodiment of FIG. 10. Switching devices for equipment and switching devices as network equipment.
  • This application also provides a readable storage medium on which instructions are stored. When the instructions are executed by a computer, the functions of any of the above method embodiments are implemented.
  • This application also provides a computer program product, which, when executed by a computer, implements the functions of any of the above method embodiments.
  • a computer program product includes one or more computer programs.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer program may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program may be transmitted from a website, computer, server or data center via a wireline (e.g.
  • Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless means to transmit to another website, computer, server or data center.
  • Computer-readable storage media can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or other integrated media that contains one or more available media. Available media may be magnetic media (e.g., floppy disks, hard disks, tapes), optical media (e.g., high-density digital video discs (DVD)), or semiconductor media (e.g., solid state disks (SSD)) )wait.
  • magnetic media e.g., floppy disks, hard disks, tapes
  • optical media e.g., high-density digital video discs (DVD)
  • semiconductor media e.g., solid state disks (SSD)
  • At least one in this application can also be described as one or more, and the plurality can be two, three, four or more, which is not limited by this application.
  • the technical feature is distinguished by “first”, “second”, “third”, “A”, “B”, “C” and “D”, etc.
  • the technical features described in “first”, “second”, “third”, “A”, “B”, “C” and “D” are in no particular order or order.
  • the corresponding relationships shown in each table in this application can be configured or predefined.
  • the values of the information in each table are only examples and can be configured as other values, which are not limited by this application.
  • the corresponding relationships shown in some rows may not be configured.
  • appropriate deformation adjustments can be made based on the above table, such as splitting, merging, etc.
  • the names of the parameters shown in the titles of the above tables may also be other names understandable by the communication device, and the values or expressions of the parameters may also be other values or expressions understandable by the communication device.
  • other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables. wait.
  • Predefinition in this application can be understood as definition, pre-definition, storage, pre-storage, pre-negotiation, pre-configuration, solidification, or pre-burning.

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Abstract

本申请实施例公开了一种切换方法及装置，通过接收第一网络设备发送的切换配置信息，根据该切换配置信息，基于目标中继终端设备执行路径切换，使得远端终端设备在与目标中继终端设备建立连接时，能够获取目标中继终端设备的服务小区，而后再执行路径切换，能够有效提升路径切换的成功率，降低通信时延，提高系统的通信效率。

Description

切换方法及装置 技术领域
本申请涉及通信技术领域，特别是指一种切换方法及装置。
背景技术
中继技术是指终端设备不直接与网络设备连接，而是通过另外一个终端设备的中继实现与网络设备的通信。其中，通过另外一个终端设备与网络设备连接的终端设备称为远端(remote)终端设备，提供中继功能的终端设备称为中继(relay)终端设备。终端设备直接与网络设备连接称为直接链路(direct link)，终端设备通过中继终端设备与网络设备连接称为间接链路(indirect link)。
相关技术中，仅支持远端终端设备在直接链路和间接链路之间进行路径切换，且与该远端终端设备进行通信的网络设备不改变。
发明内容
本申请第一方面实施例提出了一种切换方法，所述方法由第一终端设备执行，所述方法包括：
接收第一网络设备发送的切换配置信息；
根据所述切换配置信息，基于目标中继终端设备执行路径切换。
可选地，所述切换配置信息包括以下中的至少一项：
所述目标中继终端设备的标识；至少一个目标小区的标识；至少一个目标网络设备的标识；所述第一终端设备的标识。
可选地，所述根据所述切换配置信息，执行路径切换，包括：
根据所述切换配置信息，与所述目标中继终端设备建立连接。
可选地，所述方法还包括：
获取所述目标中继终端设备当前的服务小区和/或当前的服务网络设备。
可选地，响应于所述至少一个目标小区包括所述当前的服务小区，和/或，所述至少一个目标网络设备包括所述当前的服务网络设备，所述方法还包括：
通过所述目标中继终端设备，与所述目标中继终端设备当前的服务网络设备建立连接。
可选地，响应于所述至少一个目标小区不包括所述当前的服务小区，和/或，所述至少一个目标网络设备不包括所述当前的服务网络设备，所述方法还包括以下至少一种：
发起无线资源控制RRC连接重建；断开与所述目标中继终端设备的连接；恢复与所述第一网络设备的连接；进入空闲态；发起小区重选。
可选地，响应于所述路径切换为切换到间接链路，确定所述切换配置信息包括以下中的至少一项：所述目标中继终端设备的标识；至少一个目标小区的标识；至少一个目标网络设备的标识；所述第一终端设备的标识。
可选地，所述切换配置信息包括在无线资源控制RRC消息中。
可选地，所述至少一个目标小区的标识和/或所述至少一个目标网络设备的标识，包包括在以下至少一种配置信息中：
RRC重配置；侧行链路SL路径切换配置；RRC同步重配置；小区组配置；特殊小区spCell配置。
本申请第二方面实施例提出了一种切换方法，所述方法由第一网络设备执行，所述方法包括：
向第一终端设备发送切换配置信息；
所述切换配置信息，用于执行基于目标中继终端设备的路径切换。
可选地，所述切换配置信息包括以下中的至少一项：
所述目标中继终端设备的标识；至少一个目标小区的标识；至少一个目标网络设备的标识；所述第一终端设备的标识。
可选地，所述切换配置信息，用于所述第一终端设备与所述目标中继终端设备建立连接。
可选地，所述方法还包括：
响应于所述第一终端设备待执行路径切换，或者，响应于所述第一终端设备待执行切换到间接链路，确定所述切换配置信息包括以下中的至少一项：所述目标中继终端设备的标识；至少一个目标小区的标识；至少一个目标网络设备的标识；所述第一终端设备的标识。
可选地，所述方法还包括：
响应于所述第一终端设备未执行基于所述目标中继终端设备的路径切换，确定所述切换配置信息不包括以下任一种信息：
所述目标中继终端设备的标识；至少一个目标小区的标识；至少一个目标网络设备的标识；所述第一终端设备的标识。
可选地，所述切换配置信息包括在无线资源控制RRC消息中。
可选地，所述至少一个目标小区的标识和/或所述至少一个目标网络设备的标识，包括在以下至少一种配置信息中：
RRC重配置；侧行链路SL路径切换配置；RRC同步重配置；小区组配置；特殊小区spCell配置。
本申请第三方面实施例提出了一种切换装置，所述装置应用于第一终端设备，所述装置包括：
收发单元，用于接收第一网络设备发送的切换配置信息；
处理单元，用于根据所述切换配置信息，基于目标中继终端设备执行路径切换。
可选地，所述切换配置信息包括以下中的至少一项：
所述目标中继终端设备的标识；至少一个目标小区的标识；至少一个目标网络设备的标识；所述第一终端设备的标识。
可选地，所述处理单元具体用于：
根据所述切换配置信息，与所述目标中继终端设备建立连接。
可选地，所述收发单元还用于：
获取所述目标中继终端设备当前的服务小区和/或当前的服务网络设备。
可选地，响应于所述至少一个目标小区包括所述当前的服务小区，和/或，所述至少一个目标网络设备包括所述当前的服务网络设备，所述处理单元还用于：
通过所述目标中继终端设备，与所述目标中继终端设备当前的服务网络设备建立连接。
可选地，响应于所述至少一个目标小区不包括所述当前的服务小区，和/或，所述至少一个目标网络设备不包括所述当前的服务网络设备，所述处理单元还用于以下至少一种：
发起无线资源控制RRC连接重建；断开与所述目标中继终端设备的连接；恢复与所述第一网络设备的连接；进入空闲态；发起小区重选。
可选地，响应于所述路径切换为切换到间接链路，确定所述切换配置信息包括以下中的至少一项：所述目标中继终端设备的标识；至少一个目标小区的标识；至少一个目标网络设备的标识；所述第一终端设备的标识。
可选地，所述切换配置信息包括在无线资源控制RRC消息中。
可选地，所述至少一个目标小区的标识和/或所述至少一个目标网络设备的标识，包括在以下至少一种配置信息中：
RRC重配置；侧行链路SL路径切换配置；RRC同步重配置；小区组配置；特殊小区spCell配置。
本申请第四方面实施例提出了一种切换装置，所述装置应用于第一网络设备，所述装置包括：
收发单元，用于向第一终端设备发送切换配置信息；
所述切换配置信息，用于执行基于目标中继终端设备的路径切换。
可选地，所述切换配置信息包括以下中的至少一项：
所述目标中继终端设备的标识；至少一个目标小区的标识；至少一个目标网络设备的标识；所述第一终端设备的标识。
可选地，所述切换配置信息，用于所述第一终端设备与所述目标中继终端设备建立连接。
可选地，所述装置还包括：
处理单元，用于响应于所述第一终端设备待执行路径切换，或者，响应于所述第一终端设备待执行切换到间接链路，确定所述切换配置信息包括以下中的至少一项：所述目标中继终端设备的标识；至少一个目标小区的标识；至少一个目标网络设备的标识；所述第一终端设备的标识。
可选地，所述装置还包括：
处理单元，用于响应于所述第一终端设备未执行基于所述目标中继终端设备的路径切换，确定所述切换配置信息不包括以下任一种信息：
所述目标中继终端设备的标识；至少一个目标小区的标识；至少一个目标网络设备的标识；所述第一终端设备的标识。
可选地，所述切换配置信息包括在无线资源控制RRC消息中。
可选地，所述至少一个目标小区的标识和/或所述至少一个目标网络设备的标识，包括在以下至少一种配置信息：
RRC重配置；侧行链路SL路径切换配置；RRC同步重配置；小区组配置；特殊小区spCell配置。
本申请第五方面实施例提出了一种通信装置，所述装置包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述装置执行上述第一方面实施例所述的切换方法。
本申请第六方面实施例提出了一种通信装置，所述装置包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述装置执行上述第二方面实施例所述的切换方法。
本申请第七方面实施例提出了一种通信装置，该装置包括处理器和接口电路，该接口电路用于接收代码指令并传输至该处理器，该处理器用于运行所述代码指令以使该装置执行上述第一方面实施例所述的切换方法。
本申请第八方面实施例提出了一种通信装置，该装置包括处理器和接口电路，该接口电路用于接收代码指令并传输至该处理器，该处理器用于运行所述代码指令以使该装置执行上述第二方面实施例所述的切换方法。
本申请第九方面实施例提出了一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使上述第一方面实施例所述的切换方法被实现。
本申请第十方面实施例提出了一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使上述第二方面实施例所述的切换方法被实现。
本申请第十一方面实施例提出了一种计算机程序，当其在计算机上运行时，使得计算机执行第一方面实施例所述的切换方法。
本申请第十二方面实施例提出了一种计算机程序，当其在计算机上运行时，使得计算机执行第二方面实施例所述的切换方法。
本申请实施例提供的一种切换方法及装置，通过接收第一网络设备发送的切换配置信息，根据该切换配置信息，基于目标中继终端设备执行路径切换，使得远端终端设备在与目标中继终端设备建立连接时，能够获取目标中继终端设备的服务小区，而后再执行路径切换，能够有效提升路径切换的成功率，降低通信时延，提高系统的通信效率。
本申请附加的方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案，下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1为本申请实施例提供的一种通信系统的架构示意图；
图2是本申请实施例提供的一种切换方法的流程示意图；
图3是本申请实施例提供的一种切换方法的流程示意图；
图4是本申请实施例提供的一种切换方法的流程示意图；
图5是本申请实施例提供的一种切换方法的流程示意图；
图6是本申请实施例提供的一种切换方法的流程示意图；
图7a是本申请实施例提供的一种切换方法的流程示意图；
图7b是本申请实施例提供的一种切换方法应用场景示意图；
图8是本申请实施例提供的一种切换装置的结构示意图；
图9是本申请实施例提供的一种切换装置的结构示意图；
图10是本申请实施例提供的另一种切换装置的结构示意图；
图11是本申请实施例提供的一种芯片的结构示意图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本申请实施例相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本申请实施例的一些方面相一致的装置和方法的例子。
在本申请实施例使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请实施例。在本申请实施例和所附权利要求书中所使用的单数形式的“一种”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
应当理解，尽管在本申请实施例可能采用术语第一、第二、第三等来描述各种信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分开。例如，在不脱离本申请实施例范围的情况下，第一信息也可以被称为第二信息，类似地，第二信息也可以被称为第一信息。取决于语境，如在此所使用的词语“如果”及“若”可以被解释成为“在……时”或“当……时”或“响应于确定”。
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的要素。下面通过参考附图描述的实施例是示例性的，旨在用于解释本申请，而不能理解为对本申请的限制。
需要说明的是，本申请中，任一个实施例提供的方法可以单独执行，实施例中任一实现方式也可以单独执行，或是结合其他实施例，或其他实施例中的可能的实现方法一起被执行，还可以结合相关技术中的任一种技术方案一起被执行。
为了更好的理解本申请实施例公开的一种切换方法，下面首先对本申请实施例适用的通信系统进行描述。
请参见图1，图1为本申请实施例提供的一种通信系统的架构示意图。该通信系统可包括但不限于一个第一网络设备、一个第一终端设备和一个第二终端设备，图1所示的设备数量和形态仅用于举例并不构成对本申请实施例的限定，实际应用中可以包括两个或两个以上的网络设备，两个或两个以上的第一终端设备和两个或两个以上的第二终端设备。图1所示的通信系统以包括一个网络设备101，一个第一终端设备102和一个第二终端设备103为例。
需要说明的是，本申请实施例的技术方案可以应用于各种通信系统。例如：长期演进(Long Term Evolution，LTE)系统、第五代移动通信系统、5G新空口系统，或者其他未来的新型移动通信系统等。
本申请实施例中的网络设备101是网络侧的一种用于发射或接收信号的实体。例如，网络设备101和可以为演进型基站(Evolved NodeB，eNB)、传输点(Transmission Reception Point，TRP)、NR 系统中的下一代基站(Next Generation NodeB，gNB)、其他未来移动通信系统中的基站或无线保真(Wireless Fidelity，WiFi)系统中的接入节点等。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。本申请实施例提供的网络设备可以是由集中单元(Central Unit，CU)与分布式单元(Distributed Unit，DU)组成的，其中，CU也可以称为控制单元(Control Unit)，采用CU-DU的结构可以将网络设备，例如基站的协议层拆分开，部分协议层的功能放在CU集中控制，剩下部分或全部协议层的功能分布在DU中，由CU集中控制DU。
本申请实施例中的第一终端设备102和第二终端设备103是用户侧的一种用于接收或发射信号的实体，如手机。终端设备也可以称为终端设备(terminal)、用户设备(user equipment，UE)、移动台(Mobile Station，MS)、移动终端设备(Mobile Terminal，MT)等。终端设备可以是具备通信功能的汽车、智能汽车、手机(Mobile Phone)、穿戴式设备、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality，VR)终端设备、增强现实(Augmented Reality，AR)终端设备、工业控制(Industrial Control)中的无线终端设备、无人驾驶(Self-Driving)中的无线终端设备、远程手术(Remote Medical Surgery)中的无线终端设备、智能电网(Smart Grid)中的无线终端设备、运输安全(Transportation Safety)中的无线终端设备、智慧城市(Smart City)中的无线终端设备、智慧家庭(Smart Home)中的无线终端设备等等。本申请的实施例对终端设备所采用的具体技术和具体设备形态不做限定。
中继技术是指第一终端设备102不直接与网络设备101连接，而是通过另外一个终端设备(第二终端设备103)的中继实现与网络设备101的通信。其中，第一终端设备102称为远端(remote)终端设备，提供中继功能的第二终端设备103称为中继(relay)终端设备。终端设备直接与网络设备连接称为直接链路(direct link)，终端设备通过中继终端设备与网络设备连接称为间接链路(indirect link)。
相关技术中，仅支持远端终端设备在直接链路和间接链路之间进行路径切换，且与该远端终端设备进行通信的网络设备不改变。
在现有的流程中，在远端终端设备从直接链路到间接链路的路径切换过程中，同步重配置中包含路径切换的配置，无论是否存在相应的目标小区的配置，由于不涉及到gNB的改变，远端UE通过中继UE进行连接，所以远端UE只执行路径切换相关的过程，默认。
远端终端设备可以支持如下的路径切换场景：
A、gNB内间接到直接的路径切换(Intra-gNB indirect-to-direct path switching)，也就是，“远端UE<->中继UE A<->gNB X”到“远端UE<->gNB X”；
B、gNB内直接到间接的路径切换(Intra-gNB direct-to-indirect path switching)，也就是，“远端UE<->gNB X”到“远端UE<->中继UE A<->gNB X”)；
C.gNB内间接到间接的路径切换(Intra-gNB indirect-to-indirect path switching)，也就是，“远端UE<->中继UE A<->gNB X”到“远端UE<->中继UE B<->gNB X”；
D.gNB间间接到直接的路径切换(Inter-gNB indirect-to-direct path switching)，也就是，“远端UE<->中继UE A<->gNB X”到“远端UE<->gNB Y”；
E.gNB间直接到间接的路径切换(Inter-gNB direct-to-indirect path switching)，也就是，“远端UE<->gNB X”到“远端UE<->中继UE A<->gNB Y”；
F.gNB间间接到间接的路径切换(Inter-gNB indirect-to-indirect path switching)，也就是，“远端UE<->中继UE A<->gNB X”到“远端UE<->中继UE B<->gNB Y”。
在上述路径场景中，远端终端设备连接的网络设备可能会发生改变。
由于在相关技术中，远端终端设备的路径切换过程中不涉及到网络设备的改变，远端终端设备在接入中继终端设备之前并不知道目标小区。
而在R18的切换场景中，可能涉及gNB间(Inter-gNB)的路径切换，也就是远端终端设备在切换到中继终端设备时，中继终端设备所连接的小区可能会发生改变，改变之后的小区可能不是为远端终端设备进行了资源预留的目标小区。在这种情况下，远端终端设备的连接可能会发生失败。
可以理解的是，本申请实施例描述的通信系统是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着系统架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
下面结合附图对本申请所提供的切换方法及其装置进行详细地介绍。
请参见图2，图2是本申请实施例提供的一种切换方法的流程示意图。需要说明的是，本申请实施例的切换方法由第一终端设备执行。该方法可以独立执行，也可以结合本申请任意一个其他实施例一起被执行。如图2所示，该方法可以包括但不限于如下步骤：
步骤201，接收第一网络设备发送的切换配置信息。
在本申请实施例中，第一终端设备能够接收第一网络设备发送的切换配置信息。
其中，第一网络设备为源网络设备(源节点)，第一终端设备根据接收到的源网络设备发送的切换配置信息，来执行路径切换。
可以理解的是，在本申请各实施例中，第一终端设备为远端终端设备或者潜在的远端终端设备。
在本申请实施例中，第一终端设备可以直接或者间接地与第一网络设备(源网络设备)连接，也就是第一终端设备可以直接与源网络设备连接，也可以通过一个第一中继终端设备与源网络设备连接。第一终端设备可以直接接收第一网络设备发送的切换配置信息，也可以是通过一个第一中继终端设备接收第一网络设备发送的切换配置信息。
在一些实施方式中，该切换配置信息中包括以下至少一种信息：
目标中继终端设备的标识，至少一个目标小区的标识，至少一个目标网络设备的标识，第一终端设备的标识。
在一些实施方式中，响应于该第一终端设备的路径切换为切换到间接链路(indirect，也可称为间接连接)，该切换配置信息包括上述至少一种信息。
可选地，该至少一个目标小区与该目标中继终端设备对应，该至少一个目标小区可以为该目标中继终端设备可用的服务小区，也就是该至少一个目标小区为第一终端设备通过该目标中继终端设备能够接入的至少一个小区。
同样，可选地，该至少一个目标网络设备(目标节点)与该目标中继终端设备对应，该至少一个目标网络设备可以为该目标中继终端设备可用的服务网络设备，也就是该至少一个目标网络设备为第一终端设备通过该目标中继终端设备能够接入的至少一个网络设备。
可选地，该目标中继终端设备可以是U2N(UE to Network，用户设备到网络)的中继终端设备，也可以是U2U(UE to UE，用户设备到用户设备)的中继终端设备。
可以理解的是，在本申请实施例中，该至少一个目标网络设备中可以包括该第一网络设备。
在一些实施方式中，第一终端设备可以通过接收无线资源控制(Radio Resource Control，RRC)消息来接收该切换配置信息。也就是，可以在RRC消息中包括该切换配置信息。
可选地，该RRC消息可以为RRC重配置(reconfiguration)。
在一些实施方式中，该切换配置信息中的至少一个目标小区的标识和/或至少一个目标网络设备的标识，可以包含于以下至少一种配置信息中：
RRC重配置，侧行链路SL(sidelink)路径切换配置，RRC同步重配置，小区组配置，特殊小区spCell(special Cell)配置。
其中，spCell是主小区PCell(Primary Cell)和主辅小区PSCell(Primary Secondry Cell)。
步骤202，根据该切换配置信息，基于目标中继终端设备执行路径切换。
在本申请实施例中，第一终端设备在接收到切换配置信息后，能够基于目标中继终端设备执行路径切换。
在一些实施方式中，第一终端设备在接收到切换配置信息后，能够根据该切换配置信息，与目标中继终端设备建立连接。
在本申请实施例中，第一终端设备与目标中继终端设备之间的连接是通过PC5(底层直连蜂窝通信协议接口)建立的。
可选地，在建立连接时，可以将该切换配置信息中的第一终端设备的标识作为小区无线网络临时标识(Cell-Radio Network Temporary Identifier，C-RNTI)。
在一些实施方式中，第一终端设备还能够获取该目标中继终端设备当前的服务小区和/或当前的服务网络设备。
也就是，作为一种可能的实现方式，第一终端设备能够获取该目标中继终端设备当前的服务小区。
作为另一种可能的实现方式，第一终端设备能够获取该目标中继终端设备当前的服务网络设备。
作为又一种可能的实现方式，第一终端设备能够获取该目标中继终端设备当前的服务小区和当前的服务网络设备。
需要说明的是，在本申请实施例中，第一终端设备可以不与该目标中继终端设备建立连接，直接获取该目标中继终端设备当前的服务小区和/或当前的服务网络设备。也可以与该目标中继终端设备建立连接，并获取该目标中继终端设备当前的服务小区和/或当前的服务网络设备。
在一些实施方式中，第一终端设备在获取到目标中继终端设备当前的服务小区和/或服务网络设备后，能够根据该切换配置信息中的目标小区和/或目标网络设备，判断该目标中继终端设备当前的服务小区和/或服务网络设备是否为源网络设备配置的目标小区和/或目标网络设备。
响应于该至少一个目标小区包括当前的服务小区，和/或，该至少一个目标网络设备包括当前的服务网络设备，第一终端设备能够通过该目标中继终端设备，与该目标中继终端设备当前的服务网络设备建立连接。
响应于该至少一个目标小区不包括当前的服务小区，和/或，该至少一个目标网络设备不包括当前的服务网络设备，第一终端设备能够执行以下至少一种行为：
发起RRC连接重建，断开与目标中继终端设备的连接，恢复与第一网络设备的连接，进入空闲态，发起小区重选。
可选地，第一终端设备发起RRC连接重建的原因可以为路径切换失败。
可以理解的是，目标中继终端设备当前的服务小区和当前的服务网络设备是对应的，切换配置信息中的目标小区和目标网络设备也是对应的。如果该切换配置信息中的至少一个目标小区包括该当前的服务小区，则在切换配置信息中还包括至少一个目标网络设备的情况下，该至少一个目标网络设备也会包括该当前的服务网络设备。同理，如果该切换配置信息中的至少一个目标网络设备包括该当前的服务网络设备，则在切换配置信息中还包括至少一个目标小区的情况下，该至少一个目标小区也会包括该当前的服务小区。也就是，在切换配置信息中包括至少一个目标小区和至少一个目标网络设备的情况下，不存在至少一个目标小区包括当前的服务小区，但至少一个目标网络设备不包括当前的服务网络设备的情况，也不存在至少一个目标网络设备包括当前的服务网络设备，但至少一个目标小区不包括当前的服务小区的情况。
在本申请实施例中，第一终端设备在获取到目标中继终端设备当前的服务小区和/或服务网络设备后，能够确认该目标中继终端设备当前的服务小区和/或服务网络设备是否为源网络设备所配置的。如果是，则可以通过该目标中继终端设备，与该目标中继终端设备当前的服务网络设备建立连接，接入到该目标中继终端设备当前的服务小区。如果不是，则可以直接发起RRC连接重建，或者进入空闲态，或者回退到该路径切换前的连接(也就是恢复与第一网络设备的连接，该连接可以为直接连接也可以为间接连接)，或者进入空闲态并进行小区重选。
综上，通过接收第一网络设备发送的切换配置信息，根据该切换配置信息，基于目标中继终端设备执行路径切换，使得远端终端设备在与目标中继终端设备建立连接时，能够获取目标中继终端设备的服务小区，而后再执行路径切换，能够有效提升路径切换的成功率，降低通信时延，提高系统的通信效率。
请参见图3，图3是本申请实施例提供的一种切换方法的流程示意图。需要说明的是，本申请实施例的切换方法由第一终端设备执行。该方法可以独立执行，也可以结合本申请任意一个其他实施例一起被执行。如图3所示，该方法可以包括但不限于如下步骤：
步骤301，接收第一网络设备发送的切换配置信息。
在本申请实施例中，第一终端设备能够接收第一网络设备发送的切换配置信息。
其中，该切换配置信息中包括以下至少一种信息：
目标中继终端设备的标识，至少一个目标小区的标识，至少一个目标网络设备的标识，第一终端设备的标识。
其中，第一网络设备为源网络设备，第一终端设备根据接收到的源网络设备发送的切换配置信息，来执行路径切换。
在本申请实施例中，第一终端设备可以直接或者间接地与第一网络设备(源网络设备)连接，也就是第一终端设备可以直接与源网络设备连接，也可以通过一个中继终端设备与源网络设备连接。第一终端设备可以直接接收第一网络设备发送的切换配置信息，也可以是通过一个第一中继终端设备接收第一网络设备发送的切换配置信息。
在一些实施方式中，响应于该第一终端设备的路径切换为切换到间接链路(indirect，也可称为间接连接)，该切换配置信息包括上述至少一种信息。
可选地，该至少一个目标小区与该目标中继终端设备对应，该至少一个目标小区可以为该目标中继终端设备可用的服务小区，也就是该至少一个目标小区为第一终端设备通过该目标中继终端设备能够接入的至少一个小区。
同样，可选地，该至少一个目标网络设备(节点)与该目标中继终端设备对应，该至少一个目标网络设备可以为该目标中继终端设备可用的服务网络设备，也就是该至少一个目标网络设备为第一终端设备通过该目标中继终端设备能够接入的至少一个网络设备。
可以理解的是，在本申请实施例中，该至少一个目标网络设备中可以包括该第一网络设备。
在一些实施方式中，第一终端设备可以通过接收RRC消息来接收该切换配置信息。也就是，可以在RRC消息中包括该切换配置信息。
可选地，该RRC消息可以为RRC重配置。
在一些实施方式中，该切换配置信息中的至少一个目标小区的标识和/或至少一个目标网络设备的标识，可以包含于以下至少一种配置信息中：
RRC重配置，侧行链路SL路径切换配置，RRC同步重配置，小区组配置，特殊小区spCell配置。
步骤302，根据该切换配置信息，与目标中继终端设备建立连接。
在本申请实施例中，第一终端设备在接收到切换配置信息后，能够根据该切换配置信息，与目标中继终端设备建立连接。
在本申请实施例中，第一终端设备与目标中继终端设备之间的连接是通过PC5接口建立的。
可选地，在建立连接时，可以将该切换配置信息中的第一终端设备的标识作为C-RNTI。
在一些可能的实施方式中，所述方法还可以包括：
步骤303，获取目标中继终端设备当前的服务小区和/或当前的服务网络设备。
也就是，作为一种可能的实现方式，第一终端设备能够获取该目标中继终端设备当前的服务小区。
作为另一种可能的实现方式，第一终端设备能够获取该目标中继终端设备当前的服务网络设备。
作为又一种可能的实现方式，第一终端设备能够获取该目标中继终端设备当前的服务小区和当前的服务网络设备。
需要说明的是，在本申请实施例中，第一终端设备可以不与该目标中继终端设备建立连接，直接获取该目标中继终端设备当前的服务小区和/或当前的服务网络设备。也可以与该目标中继终端设备建立连接，并获取该目标中继终端设备当前的服务小区和/或当前的服务网络设备。
步骤304，确认该切换配置信息中的至少一个目标小区是否包括当前的服务小区，和/或，该切换配置信息中的至少一个目标网络设备是否包括当前的服务网络设备。
若至少一个目标小区包括当前的服务小区，和/或，至少一个目标网络设备包括当前的服务网络设备，则执行步骤305；若至少一个目标小区不包括当前的服务小区，和/或，至少一个目标网络设备不包括当前的服务网络设备，则执行步骤306至步骤310中的至少一个。
可以理解的是，目标中继终端设备当前的服务小区和当前的服务网络设备是对应的，切换配置信息中的目标小区和目标网络设备也是对应的。如果该切换配置信息中的至少一个目标小区包括该当前的服务小区，则在切换配置信息中还包括至少一个目标网络设备的情况下，该至少一个目标网络设备也会包括该当前的服务网络设备。同理，如果该切换配置信息中的至少一个目标网络设备包括该当前的服务网络设备，则在切换配置信息中还包括至少一个目标小区的情况下，该至少一个目标小区也会包括该当前的服务小区。也就是，在切换配置信息中包括至少一个目标小区和至少一个目标网络设备的情况下，不存在至少一个目标小区包括当前的服务小区，但至少一个目标网络设备不包括当前的服务网络设备的情况，也不存在至少一个目标网络设备包括当前的服务网络设备，但至少一个目标小区不包括当前的服务小区的情况。
也就是，作为一种可能的实现方式，如果第一终端设备确认至少一个目标小区中包括当前的服务小区，则执行步骤305；如果第一终端设备确认至少一个目标小区中不包括当前的服务小区，则执行步骤306至步骤310中的至少一个。
作为另一种可能的实现方式，如果第一终端设备确认至少一个目标网络设备中包括当前的服务网络设备，则执行步骤305；如果第一终端设备确认至少一个目标网络设备中不包括当前的服务网络设备，则执行步骤306至步骤310中的至少一个。
作为又一种可能的实现方式，如果第一终端设备确认至少一个目标小区中包括当前的服务小区，至少一个目标网络设备中包括当前的服务网络设备，则执行步骤305；如果第一终端设备确认至少一个目标小区中不包括当前的服务小区，至少一个目标网络设备中不包括当前的服务网络设备，则执行步骤306至步骤310中的至少一个。
步骤305，通过目标中继终端设备，与目标中继终端设备当前的服务网络设备建立连接。
在本申请实施例中，第一终端设备确认该目标中继终端设备当前的服务小区和/或服务网络设备是源网络设备所配置的，则可以通过该目标中继终端设备，与该目标中继终端设备当前的服务网络设备建立连接，接入到该目标中继终端设备当前的服务小区。
步骤306，发起无线资源控制RRC连接重建。
在本申请实施例中，第一终端设备确认该目标中继终端设备当前的服务小区和/或服务网络设备不是源网络设备所配置的，则可以直接发起RRC连接重建。
可选地，第一终端设备发起RRC连接重建的原因可以为路径切换失败。
步骤307，断开与目标中继终端设备的连接。
在本申请实施例中，第一终端设备确认该目标中继终端设备当前的服务小区和/或服务网络设备不是源网络设备所配置的，还可以断开与目标中继终端设备的连接。
步骤308，恢复与第一网络设备的连接。
在本申请实施例中，第一终端设备确认该目标中继终端设备当前的服务小区和/或服务网络设备不是源网络设备所配置的，还可以恢复与第一网络设备的连接，也就是回退到陆青切换之前的连接。
步骤309，进入空闲态。
在本申请实施例中，第一终端设备确认该目标中继终端设备当前的服务小区和/或服务网络设备不是源网络设备所配置的，还可以直接进入空闲态。
步骤310，发起小区重选。
在本申请实施例中，第一终端设备确认该目标中继终端设备当前的服务小区和/或服务网络设备不是源网络设备所配置的，还可以发起小区重选。
应理解，步骤303-310可以在步骤301和302之后执行，可以独立于步骤301以及302执行。例如，响应于第一终端设备与目标中继终端设备建立连接，第一终端设备可以执行步骤303至310中的一些步骤。
综上，通过接收第一网络设备发送的切换配置信息，根据该切换配置信息，与目标中继终端设备建立连接，获取目标中继终端设备当前的服务小区和/或当前的服务网络设备，确认该切换配置信息中的至少一个目标小区是否包括当前的服务小区，和/或，该切换配置信息中的至少一个目标网络设备是否包括当前的服务网络设备，若是则通过目标中继终端设备，与目标中继终端设备当前的服务网络设备建立连接，若否则发起RRC连接重建，或者进入空闲态，或者回退到路径切换前的连接，或者进入空闲态并进行小区重选，使得远端终端设备在与目标中继终端设备建立连接时，能够获取目标中继终端设备的服务小区，检测接入的中继终端设备的服务小区是否为路径切换配置的目标小区，而后再执行路径切换，如果不是则可以直接发起重建等而不再进行切换，能够有效提升路径切换的成功率，降低通信时延，提高系统的通信效率。
请参见图4，图4是本申请实施例提供的一种切换方法的流程示意图。需要说明的是，本申请实施例的切换方法由第一网络设备执行。该方法可以独立执行，也可以结合本申请任意一个其他实施例一起被执行。如图4所示，该方法可以包括但不限于如下步骤：
步骤401，向第一终端设备发送切换配置信息，该切换配置信息用于执行基于目标中继终端设备的路径切换。
在本申请实施例中，第一网络设备能够向第一终端设备发送切换配置信息。
其中，第一网络设备为源网络设备(源节点)，第一终端设备根据接收到的源网络设备发送的切换配置信息，来执行路径切换。
在本申请实施例中，第一终端设备可以直接或者间接地与第一网络设备(源网络设备)连接，也就是第一终端设备可以直接与源网络设备连接，也可以通过一个中继终端设备与源网络设备连接。第一网络设备可以直接向第一终端设备发送切换配置信息，也可以是通过一个中继终端设备向第一终端设备发送切换配置信息。
在一些实施方式中，该切换配置信息中包括以下至少一种信息：
目标中继终端设备的标识，至少一个目标小区的标识，至少一个目标网络设备的标识，第一终端设备的标识。
在一些实施方式中，响应于该第一终端设备待执行路径切换，或者，响应于该第一终端设备待执行切换到间接链路(indirect，也可称为间接连接)，确定该切换配置信息包括上述至少一种信息。
在一些实施方式中，如果该第一终端设备未执行基于目标中继终端设备的路径切换，确定切换配置信息不包括上述任一种信息。也就是，如果该第一终端设备不是执行基于目标中继终端设备的路径切换，则上述字段在该切换配置信息中不存在。
可选地，该至少一个目标小区与该目标中继终端设备对应，该至少一个目标小区可以为该目标中继终端设备可用的服务小区，也就是该至少一个目标小区为第一终端设备通过该目标中继终端设备能够接入的至少一个小区。
同样，可选地，该至少一个目标网络设备(目标节点)与该目标中继终端设备对应，该至少一个目标网络设备可以为该目标中继终端设备可用的服务网络设备，也就是该至少一个目标网络设备为第一终端设备通过该目标中继终端设备能够接入的至少一个网络设备。
可选地，该目标中继终端设备可以是U2N的中继终端设备，也可以是U2U的中继终端设备。
在一些实施方式中，第一网络设备可以通过向第一终端设备发送RRC消息来发送该切换配置信息。也就是，可以在RRC消息中包括该切换配置信息。
可选地，该RRC消息可以为RRC重配置(reconfiguration)。
在一些实施方式中，该切换配置信息中的至少一个目标小区的标识和/或至少一个目标网络设备的 标识，可以包含于以下至少一种配置信息中：
RRC重配置，侧行链路SL(sidelink)路径切换配置，RRC同步重配置，小区组配置，特殊小区spCell配置。
在一些实施方式中，第一网络设备在向第一终端设备发送该切换配置信息之前，能够向该切换配置信息中配置的目标小区和/或目标网络设备发送请求信息，请求该目标小区和/或目标网络设备接受远端终端设备的切换，并为该远端终端设备的切换做准备。
可以理解的是，第一网络设备可以在接收到该目标小区和/或目标网络设备发送的确认接受该请求的回复消息后，将该目标小区和/或目标网络设备加入到该切换配置信息中。如果该目标小区和/或目标网络设备拒绝了该请求，第一网络设备可以从该切换配置信息中删除掉拒绝了该请求的目标小区和/或目标网络设备。
在本申请实施例中，该切换配置信息用于基于目标中继终端设备执行路径切换。第一终端设备在接收到切换配置信息后，能够基于目标中继终端设备执行路径切换。
在一些实施方式中，该切换配置信息用于第一终端设备与目标中继终端设备建立连接。第一终端设备在接收到切换配置信息后，能够根据该切换配置信息，与目标中继终端设备建立连接。
可选地，第一终端设备与目标中继终端设备之间的连接可以是基于PC5接口建立的。
综上，通过向第一终端设备发送切换配置信息，该切换配置信息用于执行基于目标中继终端设备的路径切换，使得远端终端设备在与目标中继终端设备建立连接时，能够获取目标中继终端设备的服务小区，而后再执行路径切换，能够有效提升路径切换的成功率，降低通信时延，提高系统的通信效率。
请参见图5，图5是本申请实施例提供的一种切换方法的流程示意图。需要说明的是，本申请实施例的切换方法由第一网络设备执行。该方法可以独立执行，也可以结合本申请任意一个其他实施例一起被执行。如图5所示，该方法可以包括但不限于如下步骤：
步骤501，响应于第一终端设备待执行路径切换，或者，响应于第一终端设备待执行切换到间接链路，确定切换配置信息。
在本申请实施例中，作为一种可能的实现方式，响应于第一终端设备待执行路径切换，确定切换配置信息包括以下至少一种信息(字段)：
目标中继终端设备的标识，至少一个目标小区的标识，至少一个目标网络设备的标识，第一终端设备的标识。
作为另一种可能的实现方式，响应于第一终端设备待执行切换到间接链路，确定切换配置信息包括以下至少一种信息(字段)：
目标中继终端设备的标识，至少一个目标小区的标识，至少一个目标网络设备的标识，第一终端设备的标识。
也就是，在本申请实施例中，上述与路径切换相关的字段是条件存在的，也就是只有第一网络设备(源网络设备)确定该第一终端设备待执行路径切换，或者，待执行切换到间接链路的情况下，才会在该切换配置信息中配置上述字段。
其中，第一终端设备待执行切换到间接链路，可以包括以下至少一种情况：
从直接链路切换到与中继终端设备连接，且连接的网络设备未改变；
从直接链路切换到与中继终端设备连接，且连接的网络设备改变了；
从与中继终端设备A切换到与中继终端设备B连接，且连接的网络设备未改变；
从与中继终端设备A切换到与中继终端设备B连接，且连接的网络设备改变了。
在一些实施方式中，响应于该第一终端设备待执行基于目标中继终端设备的路径切换，上述至少一种字段的属性可以是可选的，也可以是必要的(强制的)。
在一些实施方式中，响应于该第一终端设备未执行基于目标中继终端设备的路径切换，上述至少 一种字段不存在，也就是该切换配置信息不包括以下任一种信息：
目标中继终端设备的标识，至少一个目标小区的标识，至少一个目标网络设备的标识，第一终端设备的标识。
可选地，该至少一个目标小区与该目标中继终端设备对应，该至少一个目标小区可以为该目标中继终端设备可用的服务小区，也就是该至少一个目标小区为第一终端设备通过该目标中继终端设备能够接入的至少一个小区。
同样，可选地，该至少一个目标网络设备(节点)与该目标中继终端设备对应，该至少一个目标网络设备可以为该目标中继终端设备可用的服务网络设备，也就是该至少一个目标网络设备为第一终端设备通过该目标中继终端设备能够接入的至少一个网络设备。
步骤502，向第一终端设备发送该切换配置信息，该切换配置信息用于执行基于目标中继终端设备的路径切换。
在本申请实施例中，第一网络设备能够向第一终端设备发送该切换配置信息。
在本申请实施例中，第一终端设备可以直接或者间接地与第一网络设备(源网络设备)连接，也就是第一终端设备可以直接与源网络设备连接，也可以通过一个中继终端设备与源网络设备连接。第一网络设备可以直接向第一终端设备发送切换配置信息，也可以是通过一个中继终端设备向第一终端设备发送切换配置信息。
在一些实施方式中，该切换配置信息中包括以下至少一种信息：
目标中继终端设备的标识，至少一个目标小区的标识，至少一个目标网络设备的标识，第一终端设备的标识。
可选地，该目标中继终端设备可以是U2N的中继终端设备，也可以是U2U的中继终端设备。
在一些实施方式中，第一网络设备可以通过向第一终端设备发送RRC消息来发送该切换配置信息。也就是，可以在RRC消息中包括该切换配置信息。
可选地，该RRC消息可以为RRC重配置。
在一些实施方式中，该切换配置信息中的至少一个目标小区的标识和/或至少一个目标网络设备的标识，可以包含于以下至少一种配置信息中：
RRC重配置，侧行链路SL路径切换配置，RRC同步重配置，小区组配置，特殊小区spCell配置。
在本申请实施例中，该切换配置信息用于基于目标中继终端设备执行路径切换。第一终端设备在接收到切换配置信息后，能够基于目标中继终端设备执行路径切换。
在一些实施方式中，该切换配置信息用于第一终端设备与目标中继终端设备建立连接。第一终端设备在接收到切换配置信息后，能够根据该切换配置信息，与目标中继终端设备建立连接。
可选地，第一终端设备与目标中继终端设备之间的连接可以是基于PC5接口建立的。
综上，通过响应于第一终端设备待执行路径切换，或者，响应于第一终端设备待执行切换到间接链路，确定切换配置信息，向第一终端设备发送该切换配置信息，该切换配置信息用于执行基于目标中继终端设备的路径切换，使得远端终端设备在与目标中继终端设备建立连接时，能够获取目标中继终端设备的服务小区，而后再执行路径切换，能够有效提升路径切换的成功率，降低通信时延，提高系统的通信效率。
请参见图6，图6是本申请实施例提供的一种切换方法的流程示意图。需要说明的是，本申请实施例的切换方法由目标中继终端设备执行。该方法可以独立执行，也可以结合本申请任意一个其他实施例一起被执行。如图6所示，该方法可以包括如下步骤中的一条或多条：步骤601，接收第一终端设备发送的侧行链路SL连接建立请求。
在本申请实施例中，目标中继终端设备能够接收第一终端设备发送的侧行链路sidelink连接建立请求，与第一终端设备建立sidelink的连接。
可选地，该连接建立请求中可以包括该第一终端设备的标识。
目标中继终端设备接收到第一终端设备发送的连接建立请求之后，能够根据其中包括的第一终端设备的标识与第一终端设备建立连接。
步骤602，向第一终端设备发送侧行链路SL连接建立响应。
在本申请实施例中，目标中继终端设备在接收到第一终端设备发送的连接建立的请求之后，能够接受该请求，与该第一终端设备建立sidelink连接，并向第一终端设备发送连接建立请求的响应消息。
可选地，第一终端设备与目标中继终端设备之间的连接可以是基于PC5接口建立的。
步骤603，向第一终端设备发送该目标中继终端设备当前的服务小区和/或服务网络设备。
在本申请实施例中，目标中继终端设备与第一终端设备建立了连接之后，能够与该第一终端设备进行交互，该第一终端设备能够获取到该目标中继终端设备当前的服务小区和/或服务网络设备。
可以理解的是，本申请实施例所述的向第一终端设备发送该当前的服务小区和/或服务网络设备，可以是直接发送该服务小区的标识和/或该服务网络设备的标识，也可以是通过其他信令的交互，使得第一终端设备获取到该服务小区和/或服务网络设备，而不是直接发送该服务小区和/或服务网络设备的信息。本申请实施例对此不进行限定。
在一些实施方式中，如果该第一终端设备确认该目标中继终端设备当前的服务小区和/或服务网络设备，不包括在切换配置信息中，该第一终端设备能够断开与该目标中继终端设备的连接。
综上，通过接收第一终端设备发送的连接建立消息，向第一终端设备发送侧行链路SL连接建立响应，向第一终端设备发送该目标中继终端设备当前的服务小区和/或服务网络设备，使得远端终端设备在与目标中继终端设备建立连接时，能够获取目标中继终端设备的服务小区，而后再执行路径切换，能够有效提升路径切换的成功率，降低通信时延，提高系统的通信效率。
请参见图7a，图7a是本申请实施例提供的一种切换方法的流程示意图。该方法可以独立执行，也可以结合本申请任意一个其他实施例一起被执行。如图7a所示，该方法可以包括如下步骤中的一条或多条：
本实施例中的任意一条步骤可以单独执行，也可以与其他步骤一起执行，下述各条步骤的执行顺序本申请不做限定，任意组合和执行方式均在本申请的保护范围内。本申请各实施例所述的切换方法所应用的场景可以如图7b所示。
1.第一网络设备(源节点)向第一终端设备发送切换配置信息，该切换配置信息包括一下至少一种信息：目标中继终端设备的标识，至少一个目标小区的标识，至少一个目标网络设备(目标节点)的标识，第一终端设备的标识。
可以理解的是，第一网络设备与第一终端设备之间的连接可以是直接的，也可以是间接的(通过中继连接的)。
可以理解的是，在本申请实施例中，该至少一个目标网络设备中可以包括该第一网络设备。
作为一种可能的实现方式，该至少一个目标小区与该目标中继终端设备对应，该至少一个目标小区可以为该目标中继终端设备可用的服务小区，也就是该至少一个目标小区为第一终端设备通过该目标中继终端设备能够接入的至少一个小区。
同样，作为一种可能的实现方式，该至少一个目标网络设备与该目标中继终端设备对应，该至少一个目标网络设备可以为该目标中继终端设备可用的服务网络设备，也就是该至少一个目标网络设备为第一终端设备通过该目标中继终端设备能够接入的至少一个网络设备。
作为一种可能的实现方式，该目标中继终端设备可以为U2N的中继终端设备，也可以为U2U的中继终端设备。
作为一种可能的实现方式，上述的网络设备(节点)可以为gNB。
作为一种可能的实现方式，第一网络设备可以通过向第一终端设备发送RRC消息来发送该切换配置信息。也就是，可以在RRC消息中包括该切换配置信息。
可选地，该RRC消息可以为RRC重配置。
作为一种可能的实现方式，该切换配置信息中的至少一个目标小区的标识和/或至少一个目标网络设备的标识，可以包含于以下至少一种配置信息中：
RRC重配置，侧行链路SL路径切换配置，RRC同步重配置，小区组配置，特殊小区spCell配置。
作为一种可能的实现方式，该切换配置信息中包括的上述至少一种信息(与路径切换相关的字段)是条件存在的，也就是只有第一网络设备(源网络设备)确定该第一终端设备待执行路径切换，或者，待执行切换到间接链路的情况下，才会在该切换配置信息中配置上述字段。
其中，第一终端设备待执行切换到间接链路，可以包括以下至少一种情况：
从直接链路切换到与中继终端设备连接，且连接的网络设备gNB未改变；
从直接链路切换到与中继终端设备连接，且连接的网络设备gNB改变了；
从与中继终端设备A切换到与中继终端设备B连接，且连接的网络设备gNB未改变；
从与中继终端设备A切换到与中继终端设备B连接，且连接的网络设备gNB改变了。
作为一种可能的实现方式，响应于该第一终端设备待执行基于目标中继终端设备的路径切换，上述至少一种字段的属性可以是可选的，也可以是必要的(强制的)。
作为一种可能的实现方式，响应于该第一终端设备未执行基于目标中继终端设备的路径切换，上述至少一种字段不存在，也就是该切换配置信息不包括以下任一种信息：
目标中继终端设备的标识，至少一个目标小区，至少一个目标网络设备，第一终端设备的标识。
2.第一终端设备在接收到第一网络设备发送的切换配置信息后，能够根据该切换配置信息，与目标中继终端设备建立连接。
作为一种可能的实现方式，该连接是基于PC5通信接口建立的。
作为一种可能的实现方式，在建立连接时，可以将该切换配置信息中的第一终端设备的标识作为C-RNTI。
3.第一终端设备能够获取到该目标中继终端设备当前的服务小区和/或服务网络设备，并确认该当前的服务小区和/或服务网络设备，是否包含在该切换配置信息中配置的目标小区和/或目标网络设备中。
作为一种可能的实现方式，如果该中继终端设备当前的服务小区和/或服务网络设备包含在切换配置信息中，则第一终端设备通过该目标中继终端设备与当前的服务网络设备建立连接，接入到该目标中继终端设备当前的服务小区。
作为一种可能的实现方式，如果该中继终端设备当前的服务小区和/或服务网络设备未包含在切换配置信息中，第一终端设备能够直接启动RRC连接重建，或者进入空闲态，或者回退到该路径切换前的连接，或者进入空闲态并进行小区重选。
可选地，该RRC连接重建的原因可以为路径切换失败。
与上述几种实施例提供的切换方法相对应，本申请还提供一种切换装置，由于本申请实施例提供的切换装置与上述几种实施例提供的方法相对应，因此在切换方法的实施方式也适用于下述实施例提供的切换装置，在下述实施例中不再详细描述。
请参见图8，图8为本申请实施例提供的一种切换装置的结构示意图。
如图8所示，该切换装置800包括：收发单元810和处理单元820，其中：
收发单元810，用于接收第一网络设备发送的切换配置信息；
处理单元820，用于根据该切换配置信息，基于目标中继终端设备执行路径切换。
可选地，该切换配置信息包括以下至少一种信息：
该目标中继终端设备的标识；
至少一个目标小区的标识；
至少一个目标网络设备的标识；
该第一终端设备的标识。
可选地，该处理单元820具体用于：
根据该切换配置信息，与该目标中继终端设备建立连接。
可选地，该收发单元810还用于：
获取该目标中继终端设备当前的服务小区和/或当前的服务网络设备。
可选地，响应于该至少一个目标小区包括该当前的服务小区，和/或，该至少一个目标网络设备包括该当前的服务网络设备，该处理单元820还用于：
通过该目标中继终端设备，与该目标中继终端设备当前的服务网络设备建立连接。
可选地，响应于该至少一个目标小区不包括该当前的服务小区，和/或，该至少一个目标网络设备不包括该当前的服务网络设备，该处理单元820还用于以下至少一种：
发起无线资源控制RRC连接重建；
断开与该目标中继终端设备的连接；
恢复与该第一网络设备的连接；
进入空闲态；
发起小区重选。
可选地，响应于该路径切换为切换到间接链路，该切换配置信息包括该至少一种信息。
可选地，该切换配置信息包括在无线资源控制RRC消息中。
可选地，该至少一个目标小区的标识和/或该至少一个目标网络设备的标识，包括在以下至少一种配置信息中：
RRC重配置；侧行链路SL路径切换配置；RRC同步重配置；小区组配置；特殊小区spCell配置。
本实施例的切换装置，可以通过接收第一网络设备发送的切换配置信息，根据该切换配置信息，基于目标中继终端设备执行路径切换，使得远端终端设备在与目标中继终端设备建立连接时，能够获取目标中继终端设备的服务小区，而后再执行路径切换，能够有效提升路径切换的成功率，降低通信时延，提高系统的通信效率。
请参见图9，图9为本申请实施例提供的一种切换装置的结构示意图。
如图9所示，该切换装置900包括：收发单元910，其中：
收发单元910，用于向第一终端设备发送切换配置信息；
该切换配置信息，用于执行基于目标中继终端设备的路径切换。
可选地，该切换配置信息包括以下至少一种信息：
该目标中继终端设备的标识；
至少一个目标小区的标识；
至少一个目标网络设备的标识；
该第一终端设备的标识。
可选地，该切换配置信息，用于该第一终端设备与该目标中继终端设备建立连接。
可选地，该装置还包括：
处理单元(图中未示出)，用于响应于该第一终端设备待执行路径切换，或者，响应于该第一终端设备待执行切换到间接链路，确定该切换配置信息包括该至少一种信息。
可选地，该装置还包括：
处理单元(图中未示出)，用于响应于该第一终端设备未执行基于该目标中继终端设备的路径切换，确定该切换配置信息不包括以下任一种信息：
该目标中继终端设备的标识；
至少一个目标小区的标识；
至少一个目标网络设备的标识；
该第一终端设备的标识。
可选地，无该切换配置信息包括在线资源控制RRC消息中。
可选地，该至少一个目标小区的标识和/或该至少一个目标网络设备的标识，包括在以下至少一种配置信息中：
RRC重配置；侧行链路SL路径切换配置；RRC同步重配置；小区组配置；特殊小区spCell配置。
本实施例的切换装置，可以通过向第一终端设备发送切换配置信息，该切换配置信息用于执行基于目标中继终端设备的路径切换，使得远端终端设备在与目标中继终端设备建立连接时，能够获取目标中继终端设备的服务小区，而后再执行路径切换，能够有效提升路径切换的成功率，降低通信时延，提高系统的通信效率。
为了实现上述实施例，本申请实施例还提出一种通信装置，包括：处理器和存储器，存储器中存储有计算机程序，处理器执行所述存储器中存储的计算机程序，以使装置执行图2至图3实施例所示的方法，或者执行图5实施例所示的方法。
为了实现上述实施例，本申请实施例还提出一种通信装置，包括：处理器和存储器，存储器中存储有计算机程序，处理器执行所述存储器中存储的计算机程序，以使装置执行图4至图5实施例所示的方法。
为了实现上述实施例，本申请实施例还提出一种通信装置，包括：处理器和接口电路，接口电路，用于接收代码指令并传输至处理器，处理器，用于运行所述代码指令以执行图2至图3实施例所示的方法。
为了实现上述实施例，本申请实施例还提出一种通信装置，包括：处理器和接口电路，接口电路，用于接收代码指令并传输至处理器，处理器，用于运行所述代码指令以执行图4至图5实施例所示的方法。
请参见图10，图10是本申请实施例提供的另一种切换装置的结构示意图。切换装置1000可以是网络设备，也可以是终端设备，也可以是支持网络设备实现上述方法的芯片、芯片系统、或处理器等，还可以是支持终端设备实现上述方法的芯片、芯片系统、或处理器等。该装置可用于实现上述方法实施例中描述的方法，具体可以参见上述方法实施例中的说明。
切换装置1000可以包括一个或多个处理器1001。处理器1001可以是通用处理器或者专用处理器等。例如可以是基带处理器或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对切换装置(如，基站、基带芯片，终端设备、终端设备芯片，DU或CU等)进行控制，执行计算机程序，处理计算机程序的数据。
可选的，切换装置1000中还可以包括一个或多个存储器1002，其上可以存有计算机程序1003，处理器1001执行计算机程序1003，以使得切换装置1000执行上述方法实施例中描述的方法。计算机程序1003可能固化在处理器1001中，该种情况下，处理器1001可能由硬件实现。
可选的，存储器1002中还可以存储有数据。切换装置1000和存储器1002可以单独设置，也可以集成在一起。
可选的，切换装置1000还可以包括收发器1005、天线1006。收发器1005可以称为收发单元、收发机、或收发电路等，用于实现收发功能。收发器1005可以包括接收器和发送器，接收器可以称为接收机或接收电路等，用于实现接收功能；发送器可以称为发送机或发送电路等，用于实现发送功能。
可选的，切换装置1000中还可以包括一个或多个接口电路1007。接口电路1007用于接收代码指令并传输至处理器1001。处理器1001运行代码指令以使切换装置1000执行上述方法实施例中描述的方法。
在一种实现方式中，处理器1001中可以包括用于实现接收和发送功能的收发器。例如该收发器可以是收发电路，或者是接口，或者是接口电路。用于实现接收和发送功能的收发电路、接口或接口电路可以是分开的，也可以集成在一起。上述收发电路、接口或接口电路可以用于代码/数据的读写，或 者，上述收发电路、接口或接口电路可以用于信号的传输或传递。
在一种实现方式中，切换装置1000可以包括电路，电路可以实现前述方法实施例中发送或接收或者通信的功能。本申请中描述的处理器和收发器可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路RFIC、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。该处理器和收发器也可以用各种IC工艺技术来制造，例如互补金属氧化物半导体(complementary metal oxide semiconductor，CMOS)、N型金属氧化物半导体(nMetal-oxide-semiconductor，NMOS)、P型金属氧化物半导体(positive channel metal oxide semiconductor，PMOS)、双极结型晶体管(bipolar junction transistor，BJT)、双极CMOS(BiCMOS)、硅锗(SiGe)、砷化镓(GaAs)等。
以上实施例描述中的切换装置可以是网络设备或者终端设备，但本申请中描述的切换装置的范围并不限于此，而且切换装置的结构可以不受图8-图9的限制。切换装置可以是独立的设备或者可以是较大设备的一部分。例如切换装置可以是：
(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；
(2)具有一个或多个IC的集合，可选的，该IC集合也可以包括用于存储数据，计算机程序的存储部件；
(3)ASIC，例如调制解调器(Modem)；
(4)可嵌入在其他设备内的模块；
(5)接收机、终端设备、智能终端设备、蜂窝电话、无线设备、手持机、移动单元、车载设备、网络设备、云设备、人工智能设备等等；
(6)其他等等。
对于切换装置可以是芯片或芯片系统的情况，可参见图11所示的芯片的结构示意图。图11所示的芯片包括处理器1101和接口1102。其中，处理器1101的数量可以是一个或多个，接口1102的数量可以是多个。
对于芯片用于实现本申请实施例中网络设备的功能的情况：
接口1102，用于代码指令并传输至处理器；
处理器1101，用于运行代码指令以执行如图2至图3的方法。
对于芯片用于实现本申请实施例中终端设备的功能的情况：
接口1102，用于代码指令并传输至处理器；
处理器1101，用于运行代码指令以执行如图4至图5的方法。
可选的，芯片还包括存储器1103，存储器1103用于存储必要的计算机程序和数据。
本领域技术人员还可以了解到本申请实施例列出的各种说明性逻辑块(illustrative logical block)和步骤(step)可以通过电子硬件、电脑软件，或两者的结合进行实现。这样的功能是通过硬件还是软件来实现取决于特定的应用和整个系统的设计要求。本领域技术人员可以对于每种特定的应用，可以使用各种方法实现的功能，但这种实现不应被理解为超出本申请实施例保护的范围。
本申请实施例还提供一种通信系统，该系统包括前述图8-图9实施例中作为终端设备的切换装置和作为网络设备的切换装置，或者，该系统包括前述图10实施例中作为终端设备的切换装置和作为网络设备的切换装置。
本申请还提供一种可读存储介质，其上存储有指令，该指令被计算机执行时实现上述任一方法实施例的功能。
本申请还提供一种计算机程序产品，该计算机程序产品被计算机执行时实现上述任一方法实施例的功能。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。计算机程序产品包括一个或多个计算机程序。在计算机上加载和执行计算机程序时，全部或部分地产生按照本申请实施例的流程或功能。计算 机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。计算机程序可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，计算机程序可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
本领域普通技术人员可以理解：本申请中涉及的第一、第二等各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围，也表示先后顺序。
本申请中的至少一个还可以描述为一个或多个，多个可以是两个、三个、四个或者更多个，本申请不做限制。在本申请实施例中，对于一种技术特征，通过“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”等区分该种技术特征中的技术特征，该“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”描述的技术特征间无先后顺序或者大小顺序。
本申请中各表所示的对应关系可以被配置，也可以是预定义的。各表中的信息的取值仅仅是举例，可以配置为其他值，本申请并不限定。在配置信息与各参数的对应关系时，并不一定要求必须配置各表中示意出的所有对应关系。例如，本申请中的表格中，某些行示出的对应关系也可以不配置。又例如，可以基于上述表格做适当的变形调整，例如，拆分，合并等等。上述各表中标题示出参数的名称也可以采用通信装置可理解的其他名称，其参数的取值或表示方式也可以通信装置可理解的其他取值或表示方式。上述各表在实现时，也可以采用其他的数据结构，例如可以采用数组、队列、容器、栈、线性表、指针、链表、树、图、结构体、类、堆、散列表或哈希表等。
本申请中的预定义可以理解为定义、预先定义、存储、预存储、预协商、预配置、固化、或预烧制。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
应当理解，可以使用上面所示的各种形式的流程，重新排序、增加或删除步骤。例如，本申请实施例中记载的各步骤可以并行地执行也可以顺序地执行也可以不同的次序执行，只要能够实现本发明公开的技术方案所期望的结果，本文在此不进行限制。
上述具体实施方式，并不构成对本发明保护范围的限制。本领域技术人员应该明白的是，根据设计要求和其他因素，可以进行各种修改、组合、子组合和替代。任何在本发明的精神和原则之内所作的修改、等同替换和改进等，均应包含在本发明保护范围之内。

Claims (22)

  1. 一种切换方法，其特征在于，所述方法由第一终端设备执行，所述方法包括：
    接收第一网络设备发送的切换配置信息；
    根据所述切换配置信息，基于目标中继终端设备执行路径切换。
  2. 根据权利要求1所述的方法，其特征在于，所述切换配置信息包括以下中的至少一项：
    所述目标中继终端设备的标识；
    至少一个目标小区的标识；
    至少一个目标网络设备的标识；
    所述第一终端设备的标识。
  3. 根据权利要求2所述的方法，其特征在于，所述根据所述切换配置信息，基于目标中继终端设备执行路径切换，包括：
    根据所述切换配置信息，与所述目标中继终端设备建立连接。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述方法还包括：
    获取所述目标中继终端设备当前的服务小区和/或当前的服务网络设备。
  5. 根据权利要求4所述的方法，其特征在于，所述方法还包括：
    响应于所述至少一个目标小区包括所述当前的服务小区，和/或
    响应于所述至少一个目标网络设备包括所述当前的服务网络设备，
    通过所述目标中继终端设备，与所述目标中继终端设备当前的服务网络设备建立连接。
  6. 根据权利要求4所述的方法，其特征在于，所述方法还包括：
    响应于所述至少一个目标小区不包括所述当前的服务小区；和/或
    响应于所述至少一个目标网络设备不包括所述当前的服务网络设备，
    执行以下操作中的至少一项：
    发起无线资源控制RRC连接重建；
    断开与所述目标中继终端设备的连接；
    恢复与所述第一网络设备的连接；
    进入空闲态；
    发起小区重选。
  7. 根据权利要求1所述的方法，其特征在于，响应于所述路径切换为切换到间接链路，确定所述切换配置信息包括以下中的至少一项：
    所述目标中继终端设备的标识；
    至少一个目标小区的标识；
    至少一个目标网络设备的标识；
    所述第一终端设备的标识。
  8. 根据权利要求1-7任一项所述的方法，其特征在于，所述切换配置信息包括在无线资源控制RRC消息中。
  9. 根据权利要求8所述的方法，其特征在于，所述至少一个目标小区的标识和/或所述至少一个目标网络设备的标识，包括在以下至少一种配置信息中：
    RRC重配置；
    侧行链路SL路径切换配置；
    RRC同步重配置；
    小区组配置；
    特殊小区spCell配置。
  10. 一种切换方法，其特征在于，所述方法由第一网络设备执行，所述方法包括：
    向第一终端设备发送切换配置信息；
    所述切换配置信息，用于执行基于目标中继终端设备的路径切换。
  11. 根据权利要求10所述的方法，其特征在于，所述切换配置信息包括以下中的至少一项：
    所述目标中继终端设备的标识；
    至少一个目标小区的标识；
    至少一个目标网络设备的标识；
    所述第一终端设备的标识。
  12. 根据权利要求11所述的方法，其特征在于，所述切换配置信息，用于所述第一终端设备与所述目标中继终端设备建立连接。
  13. 根据权利要求10所述的方法，其特征在于，所述方法还包括：
    响应于所述第一终端设备待执行路径切换，或者，响应于所述第一终端设备待执行切换到间接链路，确定所述切换配置信息包括以下中的至少一项：
    所述目标中继终端设备的标识；
    至少一个目标小区的标识；
    至少一个目标网络设备的标识；
    所述第一终端设备的标识。
  14. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    响应于所述第一终端设备未执行基于所述目标中继终端设备的路径切换，确定所述切换配置信息不包括以下任一种信息：
    所述目标中继终端设备的标识；
    至少一个目标小区的标识；
    至少一个目标网络设备的标识；
    所述第一终端设备的标识。
  15. 根据权利要求9-14任一项所述的方法，其特征在于，所述切换配置信息包括在无线资源控制RRC消息中。
  16. 根据权利要求15所述的方法，其特征在于，所述至少一个目标小区的标识和/或所述至少一个目标网络设备的标识，包括在以下至少一种配置信息中：
    RRC重配置；
    侧行链路SL路径切换配置；
    RRC同步重配置；
    小区组配置；
    特殊小区spCell配置。
  17. 一种切换装置，其特征在于，所述装置应用于第一终端设备，所述装置包括：
    收发单元，用于接收第一网络设备发送的切换配置信息；
    处理单元，用于根据所述切换配置信息，基于目标中继终端设备执行路径切换。
  18. 一种切换装置，应用于第一网络设备，其特征在于，所述切换装置包括：
    收发单元，用于向第一终端设备发送切换配置信息；
    所述切换配置信息，用于执行基于目标中继终端设备的路径切换。
  19. 一种通信装置，其特征在于，所述装置包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述装置执行如权利要求1至9中任一项所述的方法。
  20. 一种通信装置，其特征在于，所述装置包括处理器和存储器，所述存储器中存储有计算机程序，所述处理器执行所述存储器中存储的计算机程序，以使所述装置执行如权利要求10至16中任一项所述的方法。
  21. 一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使如权利要求1至9中任一项所述的方法被实现。
  22. 一种计算机可读存储介质，用于存储有指令，当所述指令被执行时，使如权利要求10至16中任一项所述的方法被实现。
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