WO2022228077A1 - 一种移动性管理方法及通信装置 - Google Patents

一种移动性管理方法及通信装置 Download PDF

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Publication number
WO2022228077A1
WO2022228077A1 PCT/CN2022/085652 CN2022085652W WO2022228077A1 WO 2022228077 A1 WO2022228077 A1 WO 2022228077A1 CN 2022085652 W CN2022085652 W CN 2022085652W WO 2022228077 A1 WO2022228077 A1 WO 2022228077A1
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Prior art keywords
information
cell
target
configuration information
beam information
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PCT/CN2022/085652
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English (en)
French (fr)
Inventor
娄崇
顾志方
韩锋
杨旭东
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2023566483A priority Critical patent/JP2024515822A/ja
Priority to EP22794548.2A priority patent/EP4322609A1/en
Publication of WO2022228077A1 publication Critical patent/WO2022228077A1/zh
Priority to US18/494,548 priority patent/US20240056915A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/087—Reselecting an access point between radio units of access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/085—Reselecting an access point involving beams of access points

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a mobility management method and a communication device.
  • the terminal equipment In the scenario of high frequency beamforming, due to the movement of the terminal equipment and the limited beam coverage, the terminal equipment needs to perform cell handover frequently.
  • the current beam management mechanism cannot perform effective beam management on the target cell involved in the mobility process of the terminal device. Therefore, the terminal equipment is often required to perform the mobility procedure first, and then perform the beam management procedure of the target cell.
  • the above mobility process and beam management process will not only cause long service interruption of the terminal equipment, but also cannot quickly match the terminal equipment movement and achieve rapid beam alignment, and may also cause wrong handover decisions and long beam training processes.
  • the present application provides a mobility management method and a communication device, which are used for making the source device when the access network equipment adopts the centralized unit CU-distributed unit DU separation architecture and the mobility of the terminal equipment between cells of different DUs is considered.
  • the DU and the target DU maintain the consistency of decision-making on the target beam information, and support terminal equipment to achieve rapid mobility management and beam management.
  • an embodiment of the present application provides a mobility management method, and the method may be executed by the first DU, or may be executed by a component (eg, a chip or a circuit) configured in the first DU.
  • the first DU may be the source DU when the terminal device performs mobility management.
  • the method includes: the first DU receives a first measurement result reported by a terminal device, where the first measurement result includes measurement results corresponding to K cells, where the K cells include a current serving cell and at least one non-serving cell of the terminal device , K is a positive integer; the first DU sends a first request message to the CU, the first request message includes target beam information, the target beam information is determined according to the first measurement result, and the target beam information is used for the terminal equipment to perform mobility Management; the first DU receives a first response message from the CU, where the first response message is used to indicate whether the target beam information is accepted.
  • the first request message further includes one or more of the following information: the cell identity of the target cell corresponding to the target beam information, the identity information of the second DU, or the transmission status of the terminal device information, the target cell is the cell of the second DU.
  • the above technical solution provides a mobility management process on the access network side, wherein the first DU can determine the target beam information and/or the target beam information for the terminal device to perform mobility management according to the first measurement result reported by the terminal device
  • the corresponding target cell is notified to the CU of the target beam information and/or the target cell, and the CU requests the second DU to confirm whether the target beam information and/or the target cell are available.
  • the first DU specifically determines the target beam information and/or the target cell for the terminal equipment to perform mobility management, which can effectively reduce the signaling overhead between the CU and the DU, and make the first DU and CU on the access network side.
  • the second DU can maintain the consistency of target beam information and/or target cell decision for mobility management of the terminal device, support the terminal device to perform fast mobility management, and achieve fast beam alignment to the target cell.
  • the first response message includes the updated target beam information and/or the cell identifier of the target cell corresponding to the updated target beam information.
  • the method further includes: the first DU sends a first indication message to the terminal device, where the first indication message includes target beam information and/or a target cell corresponding to the target beam information the cell ID.
  • the method further includes: the first DU receives a first configuration message from the CU, where the first configuration message includes a set of configuration information corresponding to the at least one non-serving cell ; the first DU sends a second configuration message to the terminal device, where the second configuration message includes a set of configuration information corresponding to the at least one non-serving cell.
  • a set of configuration information includes one or more of the following configuration information of a corresponding cell: reference signal configuration information, measurement configuration information, beam configuration information, quasi-co-located QCL information, and control resources Set CORESET configuration information, search space configuration information, timing advance TA information, terminal equipment identification information, sequence information for PDCCH scrambling/descrambling, random access resource configuration information, physical uplink control channel PUCCH resource configuration information, wireless Link monitoring configuration information, security-related configuration information, media access control MAC configuration information, radio link control RLC configuration information, packet data convergence protocol PDCP configuration information or service data adaptation protocol SDAP configuration information.
  • an embodiment of the present application provides a mobility management method, and the method may be executed by a CU or a component (for example, a chip or a circuit) configured in the CU.
  • the method includes: the CU receives a first request message from the first DU, the first request message includes target beam information, and the target beam information is used for the terminal device to perform mobility management; the CU sends the second request to the second DU message, the second request message includes target beam information, and the second request message is used to request the second DU to confirm the target beam information; the CU receives a second response message from the second DU, the second response message indicates the target beam information Whether it is accepted; the CU sends a first response message to the first DU, where the first response message indicates whether the target beam information is accepted.
  • the first request message further includes one or more of the following information: cell identity of the target cell corresponding to the target beam information, identity information of the second DU, or transmission status information of the terminal device ;
  • the second request message also includes one or more of the following information: the cell identity of the target cell corresponding to the target beam information, the identity information of the second DU or the transmission status information of the terminal equipment, and the target cell is the information of the second DU. community.
  • the first response message includes the updated target beam information and/or the cell identifier of the target cell corresponding to the updated target beam information;
  • the second response message includes the updated target beam information and/or the cell identifier of the target cell corresponding to the updated target beam information.
  • the method further includes: the CU receives a third configuration message from the second DU, where the third configuration message includes a set of configuration information corresponding to the target cell;
  • the DU sends a first configuration message, where the first configuration message includes a set of configuration information corresponding to at least one non-serving cell of the terminal device.
  • each set of configuration information includes one or more of the following configuration information of a corresponding cell: reference signal configuration information, measurement configuration information, beam configuration information, quasi-co-located QCL information, and control resources Set CORESET configuration information, search space configuration information, timing advance TA information, terminal equipment identification information, sequence information for PDCCH scrambling/descrambling, random access resource configuration information, physical uplink control channel PUCCH resource configuration information, wireless Link monitoring configuration information, security-related configuration information, media access control MAC configuration information, radio link control RLC configuration information, packet data convergence protocol PDCP configuration information or service data adaptation protocol SDAP configuration information.
  • an embodiment of the present application provides a mobility management method, and the method may be executed by a second DU or by a component (eg, a chip or a circuit) configured in the second DU.
  • the second DU may be the target DU when the terminal device performs mobility management.
  • the method includes: the second DU receives a second request message from the CU, where the second request message includes target beam information, where the target beam information is used by the terminal device to perform mobility management, and the second request message is used to request the second
  • the DU confirms the target beam information; the second DU sends a second response message to the CU, where the second response message is used to indicate whether to accept the target beam information.
  • the second request message further includes one or more of the following information: the cell identity of the target cell corresponding to the target beam information, the identity information of the second DU, or the transmission status of the terminal device information, the target cell is the cell of the second DU.
  • the method further includes: the second DU sends a third configuration message to the CU, where the third configuration message includes a set of configuration information corresponding to the target cell.
  • the set of configuration information includes one or more of the following configuration information of the target cell: reference signal configuration information, measurement configuration information, beam configuration information, quasi-co-located QCL information, Control resource set CORESET configuration information, search space configuration information, timing advance TA information, terminal equipment identification information, sequence information for PDCCH scrambling/descrambling, random access resource configuration information, physical uplink control channel PUCCH resource configuration information , wireless link monitoring configuration information, security-related configuration information, media access control MAC configuration information, radio link control RLC configuration information, packet data convergence protocol PDCP configuration information or service data adaptation protocol SDAP configuration information.
  • the method further includes: the second DU receives feedback information from the terminal device, where the feedback information indicates that the terminal device successfully received the first indication message, where the first indication message includes the target The cell identifier of the target cell corresponding to the beam information and/or the target beam information.
  • the method further includes: the second DU receives feedback information according to the physical uplink control channel PUCCH resource configuration information corresponding to the target cell.
  • the method includes: the first DU receives a first measurement result reported by a terminal device, where the first measurement result includes measurement results corresponding to K cells, where the K cells include a current serving cell and at least one non-serving cell of the terminal device , K is a positive integer; the first DU sends a first request message to the CU, the first request message includes at least one candidate beam information, the at least one candidate beam information is determined according to the first measurement result, and the first request message is used for requesting to determine target beam information according to the at least one candidate beam information, where the target beam information is used for the terminal device to perform mobility management; the first DU receives a first response message from the CU, where the first response message includes the target beam information.
  • the first request message further includes one or more of the following information: the cell identifier of the candidate cell corresponding to the at least one candidate beam information, the identifier information of the second DU, the terminal The transmission status information of the device or the measurement result corresponding to the at least one candidate beam information; the first response message also includes the cell identifier of the target cell corresponding to the target beam information, where the target cell is the cell of the second DU.
  • the above technical solution provides a mobility management process on the access network side, wherein the first DU can determine at least one candidate beam information and/or a candidate corresponding to the at least one candidate beam information according to the first measurement result reported by the terminal device cell, and notify the CU of the at least one candidate beam information and/or the candidate cell corresponding to the at least one candidate beam information, so that the CU can determine according to the at least one candidate beam information and/or the candidate cell corresponding to the at least one candidate beam information target beam information and/or target cell, and request the second DU to confirm whether the target beam information and/or target cell is available.
  • the CU specifically determines the target beam information and/or target cell for the terminal equipment to perform mobility management, which enables the CU to uniformly manage and schedule the cells of each DU belonging to the CU, and enables the access network side
  • the first DU, CU and second DU can maintain the consistency of the target beam information and/or target cell decision for the terminal equipment to perform mobility management, support the terminal equipment to perform fast mobility management, and realize the fast beam to the target cell. Align.
  • the method further includes: the first DU sends a first indication message to the terminal device, where the first indication message includes target beam information and/or a target corresponding to the target beam information The cell ID of the cell.
  • the method further includes: the first DU receives a first configuration message from the CU, where the first configuration message includes a set of configuration information corresponding to the at least one non-serving cell ; the first DU sends a second configuration message to the terminal device, where the second configuration message includes a set of configuration information corresponding to the at least one non-serving cell.
  • an embodiment of the present application provides a mobility management method, and the method can be executed by a CU or by a component (for example, a chip or a circuit) configured in the CU.
  • the method includes: the CU receives a first request message from a first DU, where the first request message includes at least one candidate beam information, and the first request message is used to request to determine target beam information according to the at least one candidate beam information , the target beam information is used for the terminal equipment to perform mobility management; the CU sends a second request message to the second DU, where the second request message includes the target beam information, and the second request message is used to request the second DU to confirm the target beam information; the CU receives a second response message from the second DU, where the second response message is used to indicate whether the target beam information is accepted; the CU sends a first response message to the first DU, where the first response message includes the target beam information .
  • the first request message further includes one or more of the following information: the cell identifier of the candidate cell corresponding to the at least one candidate beam information, the identifier information of the second DU, The transmission status information of the terminal device or the measurement result corresponding to the at least one candidate beam information, the target cell is the cell of the second DU; the second request message also includes one or more of the following information: the target cell corresponding to the target beam information The cell identifier of the first response message, the identifier information of the second DU or the transmission state information of the terminal device; the first response message also includes the cell identifier of the target cell corresponding to the target beam information.
  • the first response message includes the updated target beam information and/or the cell identifier of the target cell corresponding to the updated target beam information ;
  • the second response message includes the updated target beam information and/or the cell identifier of the target cell corresponding to the updated target beam information.
  • the method further includes: the CU receives a third configuration message from the second DU, where the third configuration message includes a set of configuration information corresponding to the target cell;
  • the DU sends a first configuration message, where the first configuration message includes a set of configuration information corresponding to at least one non-serving cell of the terminal device.
  • each set of configuration information includes one or more of the following configuration information of the corresponding cell: reference signal configuration information, measurement configuration information, beam configuration information, quasi-co-located QCL information, and control resources Set CORESET configuration information, search space configuration information, timing advance TA information, terminal equipment identification information, sequence information for PDCCH scrambling/descrambling, random access resource configuration information, physical uplink control channel PUCCH resource configuration information, wireless Link monitoring configuration information, security-related configuration information, media access control MAC configuration information, radio link control RLC configuration information, packet data convergence protocol PDCP configuration information or service data adaptation protocol SDAP configuration information.
  • an embodiment of the present application provides a mobility management method, and the method may be executed by the second DU or by a component (eg, a chip or a circuit) configured in the second DU.
  • the second DU may be the target DU when the terminal device performs mobility management.
  • the method includes: the second DU receives a second request message from the CU, the second request message includes target beam information, the target beam information is used for the terminal device to perform mobility management, and the second request message is used to request the first request.
  • the second DU confirms the target beam information; the second DU sends a second response message to the CU, where the second response message is used to indicate whether to accept the target beam information.
  • the second request message further includes one or more of the following information: the cell identity of the target cell corresponding to the target beam information, the identity information of the second DU, or the transmission status of the terminal device information, the target cell is the cell of the second DU.
  • the second response message includes the updated target beam information of the second DU and/or the target corresponding to the updated target beam information The cell ID of the cell.
  • the method further includes: the second DU sends a third configuration message to the CU, where the third configuration message includes a set of configuration information corresponding to the target cell.
  • the set of configuration information includes one or more of the following configuration information of the target cell: reference signal configuration information, measurement configuration information, beam configuration information, quasi-co-located QCL information, Control resource set CORESET configuration information, search space configuration information, timing advance TA information, terminal equipment identification information, sequence information for PDCCH scrambling/descrambling, random access resource configuration information, physical uplink control channel PUCCH resource configuration information , wireless link monitoring configuration information, security-related configuration information, media access control MAC configuration information, radio link control RLC configuration information, packet data convergence protocol PDCP configuration information or service data adaptation protocol SDAP configuration information.
  • the method further includes: the second DU receives feedback information from the terminal device, where the feedback information indicates that the terminal device successfully received the first indication message, where the first indication message includes the target The cell identifier of the target cell corresponding to the beam information and/or the target beam information.
  • the method further includes: the second DU receives feedback information according to the physical uplink control channel PUCCH resource configuration information corresponding to the target cell.
  • an embodiment of the present application provides a mobility management method.
  • the method may be executed by the first DU, or may be executed by a component (for example, a chip or a circuit) configured in the first DU.
  • the first DU may be the source DU when the terminal device performs mobility management.
  • the method includes: the first DU receives a first measurement result reported by a terminal device, where the first measurement result includes measurement results corresponding to K cells, where the K cells include a current serving cell of the terminal device and at least one non-resident device. Serving cell, K is a positive integer; the first DU sends a first request message to the CU, the first request message includes at least one candidate beam information, the at least one candidate beam information is determined according to the first measurement result, the first request message for requesting to determine target beam information according to the at least one candidate beam information, where the target beam information is used by the terminal device to perform mobility management; the first DU receives a first response message from the CU, where the first response message includes the target beam information.
  • the first request message further includes one or more of the following information: the cell identifier of the candidate cell corresponding to the at least one candidate beam information, the identifier information of the second DU, the terminal The transmission status information of the device or the measurement result corresponding to the at least one candidate beam information; the first response message also includes the cell identifier of the target cell corresponding to the target beam information, where the target cell is the cell of the second DU.
  • the above technical solution provides a mobility management process on the access network side, wherein the first DU can determine at least one candidate beam information and/or a candidate corresponding to the at least one candidate beam information according to the first measurement result reported by the terminal device cell, and notify the at least one candidate beam information and/or the candidate cell corresponding to the at least one candidate beam information to the CU, and the CU will then use the at least one candidate beam information and/or the at least one candidate beam information corresponding to the candidate cell Notify the second DU.
  • the second DU may be based on the at least one candidate beam information and/or the candidate cell corresponding to the at least one candidate beam information, in combination with the load of the second DU's own cell or the signal quality of the uplink reference signal sent by the terminal device to the second DU , and determine the appropriate target beam information and/or the target cell corresponding to the target beam information.
  • the second DU specifically determines the target beam information and/or the target cell for the terminal equipment to perform mobility management, which can effectively realize the load balance of the target cell, and make the first DU, CU and second DU on the access network side
  • the consistency of target beam information and/or target cell decision for mobility management of terminal equipment can be maintained, fast mobility management of terminal equipment is supported, and fast beam alignment to the target cell can be realized.
  • the method further includes: the first DU sends a first indication message to the terminal device, where the first indication message includes target beam information and/or a target corresponding to the target beam information The cell ID of the cell.
  • the method further includes: the first DU receives a first configuration message from the CU, where the first configuration message includes a set of configuration information corresponding to the at least one non-serving cell ; the first DU sends a second configuration message to the terminal device, where the second configuration message includes a set of configuration information corresponding to the at least one non-serving cell.
  • the set of configuration information includes one or more of the following configuration information of the corresponding cell: reference signal configuration information, measurement configuration information, beam configuration information, quasi-co-located QCL information, Control resource set CORESET configuration information, search space configuration information, timing advance TA information, terminal equipment identification information, sequence information for PDCCH scrambling/descrambling, random access resource configuration information, physical uplink control channel PUCCH resource configuration information , wireless link monitoring configuration information, security-related configuration information, media access control MAC configuration information, radio link control RLC configuration information, packet data convergence protocol PDCP configuration information or service data adaptation protocol SDAP configuration information.
  • an embodiment of the present application provides a mobility management method, and the method may be executed by a CU or a component (for example, a chip or a circuit) configured in the CU.
  • the method includes: the CU receives a first request message from a first DU, where the first request message includes at least one candidate beam information, and the first request message is used to request to determine target beam information according to the at least one candidate beam information , the target beam information is used for the terminal equipment to perform mobility management; the CU sends a second request message to the second DU, the second request message includes the at least one candidate beam information, and the second request message is used to request The at least one candidate beam information determines target beam information; the CU receives a second response message from the second DU, the second response message includes the target beam information; the CU sends a first response message to the first DU, the first response message The response message includes target beam information.
  • the first request message further includes one or more of the following information: a cell identifier of a candidate cell corresponding to the at least one candidate beam information, identifier information of the second DU, The transmission status information of the terminal device or the measurement result corresponding to the at least one candidate beam information;
  • the second request message also includes one or more of the following information: the cell identifier of the candidate cell corresponding to the at least one candidate beam information, The identification information of the second DU, the transmission state information of the terminal device, or the measurement result corresponding to the at least one candidate beam information;
  • the first response message also includes the cell identifier of the target cell corresponding to the target beam information, and the target cell is the second The cell of the DU;
  • the second response message further includes the cell identifier of the target cell corresponding to the target beam information.
  • the method further includes: the CU receives a third configuration message from the second DU, where the third configuration message includes a set of configuration information corresponding to the target cell;
  • the DU sends a first configuration message, where the first configuration message includes a set of configuration information corresponding to at least one non-serving cell of the terminal device.
  • each set of configuration information includes one or more of the following configuration information of a corresponding cell: reference signal configuration information, measurement configuration information, beam configuration information, quasi-co-located QCL information, and control resources Set CORESET configuration information, search space configuration information, timing advance TA information, terminal equipment identification information, sequence information for PDCCH scrambling/descrambling, random access resource configuration information, physical uplink control channel PUCCH resource configuration information, wireless Link monitoring configuration information, security-related configuration information, media access control MAC configuration information, radio link control RLC configuration information, packet data convergence protocol PDCP configuration information or service data adaptation protocol SDAP configuration information.
  • an embodiment of the present application provides a mobility management method, and the method may be executed by the second DU or by a component (eg, a chip or a circuit) configured in the second DU.
  • the second DU may be the target DU when the terminal device performs mobility management.
  • the method includes: the second DU receives a second request message from the CU, where the second request message includes at least one candidate beam information, and the second request message is used to request to determine target beam information according to the at least one candidate beam information , the target beam information is used for the terminal device to perform mobility management; the second DU sends a second response message to the CU, where the second response message includes the target beam information.
  • the second request message further includes one or more of the following information: cell identifiers of the candidate cells corresponding to the at least one candidate beam information, identifier information of the second DU, The transmission state information of the terminal device or the measurement result corresponding to the information of at least one candidate beam; the second response message also includes the cell identifier of the target cell corresponding to the target beam information, and the target cell is the cell of the second DU.
  • the method further includes: the second DU sends a third configuration message to the CU, where the third configuration message includes a set of configuration information corresponding to the target cell.
  • the set of configuration information includes one or more of the following configuration information of the target cell: reference signal configuration information, measurement configuration information, beam configuration information, quasi-co-located QCL information, control resources Set CORESET configuration information, search space configuration information, timing advance TA information, terminal equipment identification information, random access resource configuration information, physical uplink control channel PUCCH resource configuration information, wireless link monitoring configuration information, security-related configuration information, media Access control MAC configuration information, radio link control RLC configuration information, packet data convergence protocol PDCP configuration information or service data adaptation protocol SDAP configuration information.
  • the method further includes: the second DU receives feedback information from the terminal device, where the feedback information indicates that the terminal device successfully received the first indication message, where the first indication message includes the target The cell identifier of the target cell corresponding to the beam information and/or the target beam information.
  • the method further includes: the second DU receives feedback information according to the physical uplink control channel PUCCH resource configuration information corresponding to the target cell.
  • an embodiment of the present application provides a communication device.
  • the communication device may have the function of implementing the first DU or CU or the second DU in the above aspects.
  • the communication device may be an access network device or an access network device.
  • the functions of the above communication apparatus may be implemented by hardware, or by executing corresponding software in hardware, and the hardware or software includes one or more modules or units or means corresponding to the above functions.
  • the structure of the communication device includes a processing module and a transceiver module, wherein the processing module is configured to support the communication device to perform the corresponding functions of the first DU or CU or the second DU in the above aspects.
  • the transceiver module is used to support communication between the communication device and other communication devices. For example, when the communication device is the first DU, a first request message can be sent to the CU.
  • the communication device may further include a storage module, which is coupled with the processing module and stores necessary program instructions and data of the communication device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory
  • the memory may be integrated with the processor, or may be provided separately from the processor.
  • the structure of the communication device includes a processor, and may also include a memory.
  • the processor is coupled to the memory and operable to execute computer program instructions stored in the memory to cause the communication apparatus to perform the methods of the above-described aspects.
  • the communication device further includes a communication interface, and the processor is coupled to the communication interface.
  • the communication interface may be a transceiver or an input/output interface; when the communication device is a chip included in the network device, the communication interface may be an input/output interface of the chip.
  • the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.
  • an embodiment of the present application provides a chip system, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor At the time, the chip system is made to implement the methods in the above aspects.
  • the chip system further includes an interface circuit, and the interface circuit is used to exchange code instructions to the processor.
  • processors in the chip system, and the processors may be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory can be integrated with the processor, or can be provided separately from the processor.
  • the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be provided on different chips.
  • an embodiment of the present application provides a computer-readable storage medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes the communication apparatus to perform the above aspects or any one of the aspects. method in a possible design.
  • an embodiment of the present application provides a computer program product that, when a communication device executes the computer program product, causes the communication device to execute the above aspects or the methods in any possible designs of the various aspects.
  • an embodiment of the present application provides a communication system, where the communication system includes a first DU, a CU, and a second DU.
  • the communication system further includes a terminal device.
  • the communication system may further include core network equipment.
  • FIG. 1 is a schematic diagram of a network architecture of a communication system to which an embodiment of the application is applicable;
  • FIG. 2 is a schematic diagram of a CU-DU separation architecture adopted by an access network device in an embodiment of the present application
  • FIG. 3 is a schematic flowchart of a mobility management method provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a CU providing configuration information of the at least one other cell to a first DU and a terminal device in an embodiment of the present application;
  • FIG. 5 is a schematic flowchart of another mobility management method provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another mobility management method provided by an embodiment of the present application.
  • FIG. 7 and FIG. 8 are schematic diagrams of two possible implementation manners in which the terminal device and the second DU confirm the timing of performing mobility management in the embodiments of the present application;
  • FIG. 9 , FIG. 10 , and FIG. 11 are schematic structural diagrams of a communication device according to an embodiment of the application.
  • UMTS universal mobile telecommunications system
  • CDMA code division multiple access
  • WLAN wireless local area network
  • LTE long term evolution
  • FDD LTE frequency division duplex
  • TDD LTE time division duplex
  • 5G 5th generation
  • NR new radio
  • FIG. 1 is a schematic diagram of a network architecture of a communication system provided by the present application.
  • the communication system includes an access network device and a terminal device.
  • the terminal equipment is located within the coverage of one or more cells (carriers) provided by the access network equipment, and there may be one or more cells serving the terminal equipment.
  • the terminal equipment can follow the carrier aggregation (CA) or dual connectivity (DC) or coordinated multiple points transmission/reception (CoMP) method.
  • CA carrier aggregation
  • DC dual connectivity
  • CoMP coordinated multiple points transmission/reception
  • the terminal device 110 is simultaneously located in the cell of the access network device 120, the cell of the access network device 130, and the cell of the access network device 140, and the access network device 120 may be a macro base station (such as a macro base station).
  • eNB the access network device 130 and the access network device 140 may be micro base stations (such as small eNBs).
  • FIG. 1 is only a schematic diagram, and the communication system may also include other network devices such as core network devices, wireless relay devices, and wireless backhaul devices, which are not shown in FIG. 1 .
  • the embodiments of the present application do not limit the number of access network devices, terminal devices, core network devices, and other network devices included in the communication system.
  • the access network devices in the embodiments of the present application may correspond to different devices in communication systems of different types or standards.
  • they correspond to the access network devices (eg, gNB or ng-eNB) in 5G.
  • the access network devices eg, gNB or ng-eNB
  • the 4G system Corresponds to access network equipment in 4G (eg eNB or en-gNB).
  • the access network device and the terminal device can communicate through licensed spectrum, communicate through unlicensed spectrum, or communicate through licensed spectrum and unlicensed spectrum at the same time.
  • the access network equipment and the terminal equipment can communicate through the frequency spectrum below 6 GHz (gigahertz, GHz), and can also communicate through the frequency spectrum above 6 GHz, and can also use the frequency spectrum below 6 GHz and the frequency spectrum above 6 GHz for communication at the same time. .
  • This embodiment of the present application does not limit the spectrum resources used between the access network device and the terminal device.
  • the access network equipment and terminal equipment in the embodiments of the present application can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on water; and can also be deployed on aircraft, balloons, and artificial satellites in the air.
  • the embodiments of the present application do not limit the application scenarios of the access network device and the terminal device.
  • the network architecture and service scenarios described in the embodiments of the present application are for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. It can be seen that, with the evolution of the communication network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.
  • the terminal equipment involved in the embodiments of this application which may also be referred to as a terminal, user equipment (UE), mobile station, mobile terminal, etc., is a device that provides voice and/or data connectivity to users , such as handheld devices with wireless connectivity, in-vehicle devices, etc.
  • the terminal equipment is wirelessly connected to the access network equipment so as to be connected to the communication system.
  • Examples of some current terminal equipment include: mobile phones, tablet computers, computers with wireless transceiver functions, PDAs, mobile Internet equipment, wearable equipment, virtual reality terminal equipment, augmented reality terminal equipment, wireless terminals in industrial control, unmanned Wireless terminals in driving, wireless terminals in remote surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full functions, large sizes, and can achieve complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • Use such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the terminal device may also be an on-board module, on-board component, on-board chip or on-board unit built into the vehicle as one or more components or units, and the vehicle passes the built-in on-board module, on-board module, on-board component, on-board chip or on-board unit.
  • a unit may implement the methods of the present application.
  • the access network device involved in the embodiments of the present application is a node or device in a radio access network (RAN) used to access a terminal device to a wireless network.
  • RAN radio access network
  • examples of some current access network equipment include: base station (base station), evolved NodeB (evolved NodeB, eNB) in LTE system or evolved LTE system (LTE-Advanced, LTE-A), downlink in 5G communication system Next generation NodeB (gNB), transmission reception point (TRP), Node B (NB, NB), radio network controller (RNC), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (home (evolved) NodeB, HNB), base band unit (base band unit, BBU), wireless fidelity (wireless fidelity, WiFi) access point (access point) point, AP), base stations in future mobile communication systems, etc.
  • base station base station
  • evolved NodeB evolved NodeB
  • eNB
  • the access network device may also be a module or unit that completes some functions of the base station, for example, may be a centralized unit (central unit, CU), or a distributed unit (distributed unit, DU).
  • CU central unit
  • DU distributed unit
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the access network device.
  • the access network device in the embodiment of the present application may adopt a CU-DU separation architecture, and the CU-DU separation architecture may also be referred to as a distributed deployment architecture.
  • the access network device may logically include one CU and one or more DUs, each DU can be connected to the CU through the F1 interface, and the information exchange between different DUs can be completed based on the forwarding of the CU .
  • the CU and the DU may be physically set together or physically separated, which is not limited.
  • CU can support radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP), service data adaptation protocol (service data adaptation protocol, SDAP) functions;
  • DU can support wireless chain Functions of the radio link control (RLC) layer protocol, the medium access control (MAC) layer protocol and the physical (PHY) layer protocol.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • SDAP service data adaptation protocol
  • DU can support wireless chain Functions of the radio link control (RLC) layer protocol, the medium access control (MAC) layer protocol and the physical (PHY) layer protocol.
  • RLC radio link control
  • MAC medium access control
  • PHY physical
  • “Plurality” refers to two or more than two, and in view of this, “plurality” may also be understood as “at least two” in the embodiments of the present application.
  • “At least one” can be understood as one or more, such as one, two or more. For example, including at least one means including one, two or more, and does not limit which ones are included. For example, if at least one of A, B, and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C may be included. Similarly, the understanding of descriptions such as “at least one” is similar.
  • ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the order, sequence, priority, or importance of multiple objects. Moreover, the description of “first” and “second” does not limit the objects to be necessarily different.
  • Control resource set (control resource set, CORESET): It can be understood as a time-frequency resource set, which is used to indicate the resource location of physical downlink control channel (physical downlink control channel, PDCCH) transmission, including the number of time domain symbols occupied by PDCCH, frequency The number of resource blocks in the domain and the allocation of time slots, etc.
  • PDCCH physical downlink control channel
  • one CORESET can be configured as one or several consecutive OFDM symbols; in the frequency domain, one CORESET can be a set of continuous or non-consecutive frequency domain resources, including search spaces under different aggregation levels .
  • Search space used to indicate the period of CORESET occurrence and specific resource information, such as the initial time slot in symbols, and the period of repeated occurrence, so that the terminal device can search for the PDCCH at the resource position of the indicated search space.
  • a search space can be associated with at least one CORESET.
  • Multi-antenna beamforming can make the beam point in a specific direction by changing the phase and amplitude of the signal from each antenna.
  • the transmission and reception of all uplink and downlink channels are based on beams, so beam management is required, so that both ends of the transceiver can send and receive data on the most suitable beams, improve signal strength, avoid signal interference, and improve communication. quality.
  • the beam management mechanism may include the following procedures: 1) Beam scanning: beams that transmit reference signals, perform spatial scanning at predefined time intervals; 2) Beam measurement/decision: terminal equipment measures reference signals and selects the best beam. 3) Beam report: the terminal equipment reports the result of beam measurement; 4) Beam indication: the access network equipment instructs the terminal equipment to select the designated beam.
  • the reference signals used for beam management may include: a synchronization signal and a physical broadcast channel block (synchronization signal and physical broadcast channel block, SSB) in the downlink direction, a channel state information reference signal (channel state information reference signal, CSI-RS), And PRACH and channel sounding reference signal (sounding reference signal, SRS) in the uplink direction, wherein, SSB can be applied to idle state initial access state or connected state, PRACH can be applied to idle state initial access, CSI-RS and SRS Applicable to connected state.
  • SSB can be applied to idle state initial access state or connected state
  • PRACH can be applied to idle state initial access
  • a physical downlink shared channel (PDSCH), a physical downlink control channel (PDCCH), a physical uplink shared channel (PUSCH) and a physical uplink control channel (physical uplink control channel, PUCCH) is only an example of the downlink data channel, downlink control channel, uplink data channel and uplink control channel of the physical layer.
  • the data channel and control channel may have Different names are not limited in this application.
  • the access network equipment adopts the CU-DU separation architecture
  • the terminal equipment if the terminal equipment is to move from the cell of the source DU to the cell of the target DU belonging to the same CU as the source DU, the source DU and the target DU can pass the F1 between them and the CU.
  • the interface exchanges signaling such as UE context modification request and response, UE context establishment request and response, and RRC reconfiguration.
  • the above process not only has high signaling overhead, but also cannot respond to the rapid movement of the terminal equipment in time, and cannot effectively manage the beam of the target cell to achieve beam alignment with the target cell.
  • the present application provides a mobility management method, which can be applied in a scenario where a terminal device moves between cells of different DUs of the same CU under the CU-DU separation architecture.
  • This scenario may also be referred to as an inter-DU (inter-DU) mobility management scenario.
  • the first DU, CU and second DU on the network side can negotiate and determine the target beam information and/or target cell of the terminal device through the method provided in this application, and indicate to the terminal device.
  • the first DU, CU, and second DU can maintain the consistency of the decision on the target beam information and/or the target cell, so that the terminal device can perform mobility management according to the target beam information and/or the target cell, so as to achieve fast communication with the target cell. beam alignment.
  • the present application may include three possible technical solutions. For the convenience of description, they are referred to as scheme 1, scheme 2 and scheme 3 respectively.
  • Option 1, Option 2 and Option 3 will be described in detail below.
  • the first DU and the second DU are different DUs belonging to the same CU.
  • the first DU may be the source DU in the mobility management process of the terminal device, that is, the DU to which the current serving cell of the terminal device belongs.
  • the second DU may be the target DU in the mobility management process of the terminal device, that is, the DU to which the target cell for which the terminal device performs mobility management belongs.
  • the target cell may be a cell to which the terminal device is to be handed over, a cell to which the terminal device will add or activate as a secondary cell, or a cell to assist the terminal device in data transmission, etc., which are not limited in this application.
  • FIG. 3 is a schematic flowchart of a mobility management method provided by an embodiment of the present application.
  • the method includes:
  • Step S301 The first DU receives a first measurement result reported by a terminal device, where the first measurement result includes measurement results corresponding to K cells, where K is a positive integer.
  • the above K cells include the current serving cell of the terminal device and at least one non-serving cell.
  • the serving cell is the cell of the first DU
  • the at least one non-serving cell is the cell of at least one other DU belonging to the same CU as the first DU, where the at least one other DU may include the second DU (that is, the target determined hereinafter).
  • the at least one non-serving cell is a neighboring cell of the serving cell.
  • the above-mentioned first measurement result is obtained by the terminal equipment measuring the downlink reference signals of the above-mentioned K cells.
  • the measurement result corresponding to the current serving cell of the terminal equipment may include: the measurement result of at least one downlink reference signal of the serving cell, or the average measurement result of the downlink reference signal of the serving cell, or the downlink reference signal of the serving cell. Average measurement result of the top N downlink reference signals with the best signal quality, where N is a positive integer.
  • the measurement result (or average measurement result) may be channel status information (channel status information, CSI), such as received signal receiving power (receive signal receiving power, RSRP) and other indicators used to represent the received quality of the reference signal.
  • CSI channel status information
  • RSRP received signal receiving power
  • the measurement result corresponding to the serving cell may further include a cell identifier associated with the downlink reference signal, that is, the cell identifier of the serving cell.
  • the cell identity may be a physical cell identity (physical cell identity, PCI).
  • the measurement result corresponding to the non-serving cell may include: the measurement result of at least one downlink reference signal of the non-serving cell, or the downlink reference signal of the non-serving cell.
  • the measurement result (or average measurement result) may be CSI, such as RSRP, etc., an indicator used to represent the received quality of the reference signal.
  • the measurement result corresponding to the non-serving cell may further include a cell identifier associated with the downlink reference signal, that is, the cell identifier of the non-serving cell.
  • the cell identity may be PCI.
  • different downlink reference signals may correspond to different beam directions.
  • the signal strength of the beam direction corresponding to the downlink reference signal can be determined.
  • the cell indication in the first measurement result can be indicated explicitly by carrying a cell identifier such as PCI in the measurement result corresponding to each cell, or it can be indicated implicitly by a reference signal identifier.
  • the reference signal and the reference signal can be configured in advance. The association relationship between cells, if the reference signal identifier is in the range of a to b, it belongs to cell 0, and if the reference signal identifier is in the range of c to d, it belongs to cell 1.
  • the terminal device reporting the first measurement result to the first DU may be: the terminal device sends a first measurement message to the first DU, where the first measurement message includes the above-mentioned first measurement result.
  • the first measurement message may be physical layer signaling (for example, PUCCH signaling), or may be a medium access control-control element (MAC CE) message or an RRC layer message. Not limited.
  • PUCCH signaling for example, PUCCH signaling
  • MAC CE medium access control-control element
  • RRC layer message not limited.
  • the first measurement message may be configured with a dedicated scheduling request (SR) resource, which is used to trigger an SR process when there is no available uplink grant resource, and send an SR through the PUCCH to notify the first DU to schedule an uplink grant. resources to send the first measurement message.
  • the terminal device may cancel the above-mentioned SR process after sending the first measurement message or receiving the beam indication from the first DU.
  • SR dedicated scheduling request
  • the CU may send a first configuration message to the first DU, where the first configuration message includes a set of configuration information corresponding to the at least one non-serving cell.
  • the first configuration message may include a set of configuration information corresponding to adjacent cell 1 and a set of configuration information corresponding to adjacent cell 2. information.
  • the first configuration message may further include a set of configuration information corresponding to the serving cell.
  • the CU updates the relevant configuration of the serving cell of the first DU (for example, reconfigures the reference signal set of the serving cell that needs to be measured)
  • the CU can also send the first configuration message to the CU.
  • the first DU sends the updated set of configuration information corresponding to the serving cell.
  • Each set of configuration information may include one or more of the following configuration information of the corresponding cell: reference signal configuration information, measurement configuration information, beam configuration information, quasi co-location (QCL) information, control resource set CORESET configuration information, search space configuration information, timing advance (TA) information, terminal equipment identification information, sequence information for PDCCH scrambling/descrambling, random access resource configuration information, PUCCH resource configuration information, radio link Monitoring configuration information, security-related configuration information, MAC configuration information, RLC configuration information, PDCP configuration information or SDAP configuration information.
  • the types and specific contents of the configuration information included in a set of configuration information corresponding to different cells may be the same or different, which is not limited in this application.
  • a set of configuration information corresponding to a certain cell may contain all types of configuration information listed above, while a set of configuration information corresponding to another cell may contain some types of configuration information listed above.
  • the terminal device may consider it to be consistent with the current serving cell.
  • the reference signal configuration information includes a related configuration of at least one reference signal of a corresponding cell, and the at least one reference signal may include SSB, CSI-RS, SRS, and the like.
  • the reference signal configuration information may further include information used to indicate an association relationship between the at least one reference signal and a corresponding cell, so that the terminal device can identify the reference signal of which cell a certain reference signal is.
  • the indication of the association relationship between the at least one reference signal and the corresponding cell may be in the following two ways:
  • the reference signal configuration information includes a cell identifier associated with the at least one reference signal.
  • the terminal device can determine the cell associated with the reference signal according to the cell identifier in the reference signal configuration information.
  • Mode 2 Implicit cell indication.
  • the reference signals are grouped according to associated cells, and the reference signal configuration information includes grouping information of the at least one reference signal.
  • the terminal device can determine the cell associated with the reference signal according to the grouping information of the reference signal in the reference signal configuration information.
  • the measurement configuration information includes the related configuration of measurement and reporting of at least one reference signal of the corresponding cell.
  • the measurement configuration information may include some information related to the reporting of measurement results, such as the period for reporting measurement results, the conditions that need to be met for reporting measurement results, and the resources used for reporting measurement results , hysteresis factor, result filtering information, etc.
  • the resources used for the measurement result reporting may be resources of the corresponding cell.
  • the beam configuration information includes downlink beam indication information and/or uplink beam indication information of the corresponding cell.
  • the downlink beam indication information may be used to indicate at least one downlink beam direction of the corresponding cell
  • the uplink beam indication information may be used to indicate at least one uplink beam direction of the corresponding cell.
  • the downlink beam indication information may include transmission configuration indication (transmission configuration indication, TCI) state information of at least one physical channel of the corresponding cell
  • the TCI state information may include a TCI state identifier and a QCL relationship associated with the TCI state.
  • the uplink beam indication information may include reference signal identifiers corresponding to at least one uplink beam, such as SRS identifiers, SSB identifiers, CSI-RS identifiers, and the like.
  • the beam configuration information may also include information used to indicate the association between the downlink beam indication information/uplink beam indication information and the corresponding cell, so that the terminal device can identify a certain downlink beam indication information/uplink beam.
  • the indication information is specifically the beam indication information of which cell.
  • the beam configuration information may include the cell identifier of the cell associated with the downlink beam indication information/or the uplink beam indication information.
  • the TCI state information can be expressed as: TCI state identifier, QCL relationship ⁇ reference signal, cell identifier ⁇ , used to indicate that a TCI state has a QCL relationship with a certain reference signal of a certain cell.
  • the terminal device can determine the cell associated with the TCI state information according to the cell identifier in the beam configuration information.
  • the QCL information includes a QCL relationship between at least one physical channel and at least one reference signal of the corresponding cell, which may be indicated by a TCI state.
  • the at least one physical channel may include PDCCH, PDSCH, PUCCH, PUSCH, etc.
  • the at least one reference signal may include SSB, CSI-RS, SRS, and the like.
  • the CORESET configuration information of the control resource set includes the CORESET related configuration of the corresponding cell, such as the CORESET identifier.
  • the search space SS configuration information includes the relevant configuration of the search space of the corresponding cell, such as at least one associated CORESET identifier, a start time slot, a symbol, a period, and the like.
  • the TA configuration information includes the TA information of the corresponding cell.
  • the TA information can be used to indicate whether the TA of the corresponding cell is 0, or it can also be the TA value of the terminal device in the corresponding cell.
  • the TA value can be determined by the receiver.
  • the network access device estimates it according to the uplink reference signal sent by the terminal device.
  • the terminal equipment identification information includes terminal equipment identification information allocated to the terminal equipment by the corresponding cell, and is used to identify the terminal equipment in the corresponding cell.
  • the terminal equipment identification information may be a cell radio network temporary identifier (cell radio network temporary identifier, C-RNTI), or a temporary cell radio network temporary identifier (Temporary C-RNTI, TC-RNTI), or the like.
  • the sequence information used for PDCCH scrambling/descrambling may be different from terminal equipment identity information such as C-RNTI.
  • the random access resource configuration information includes the random access preamble of the corresponding cell, the random access available time slot and other resources used for the random access process, wherein the random access available time slot is used to transmit the random access preamble code.
  • the PUCCH resource configuration information includes the relevant configuration of the PUCCH resources of the corresponding cell, and the PUCCH resources can be used to transmit hybrid automatic repeat request (HARQ) feedback, scheduling requests, CSI measurement results, and the like.
  • HARQ hybrid automatic repeat request
  • the wireless link monitoring configuration information includes the wireless link monitoring configuration of the corresponding cell, which is used to monitor the wireless link quality of the corresponding cell and detect whether the communication link of the corresponding cell is faulty, such as whether a wireless link failure has occurred.
  • the security-related configuration information includes configurations such as data encryption and/or integrity protection of the corresponding cell, for example, including the required secret key, algorithm, or parameters required to update the secret key, etc., which are used to implement encryption and/or encryption of data communicated with the corresponding cell. / or integrity protection function to ensure the security of communication.
  • the first configuration message may be a UE context setup request (UE Context Setup Request) message, or a UE context modification (UE Context Modification) message, or an RRC message transfer (RRC Message Transfer) message.
  • UE Context Setup Request UE Context Setup Request
  • UE context modification UE Context Modification
  • RRC message transfer RRC Message Transfer
  • the CU can notify the first DU of the configuration information of the at least one non-serving cell and the serving cell, so that the first DU can notify the configuration information of the at least one non-serving cell and the serving cell to Terminal Equipment.
  • the first DU may further send a response message corresponding to the first configuration message to the CU, for confirming or negotiating the configuration information in the first configuration message.
  • confirming the configuration information in the first configuration message may mean that the first DU sends an ACKnowledgement (ACK) or a negative ACKnowledgement (NACK) feedback to the CU for the received first configuration message.
  • ACK ACKnowledgement
  • NACK negative ACKnowledgement
  • Negotiating the configuration information in the first configuration message may mean that the first DU informs the CU through a response message that some configuration information may be missing, and it is hoped that the next time the CU sends the first configuration message, the configuration information can be included.
  • the first DU may send a second configuration message to the terminal device, where the second configuration message includes a set of configuration information corresponding to the at least one non-serving cell.
  • the second configuration information may further include a set of configuration information corresponding to the serving cell.
  • the second configuration message may be any air interface signaling such as an RRC message and a MAC message.
  • messages such as RRC configuration message, RRC setup message, RRC recovery message or MAC CE message.
  • the terminal device may also send a response message corresponding to the second configuration message to the first DU to confirm or negotiate the configuration information in the second configuration message.
  • the terminal device may measure the downlink reference signals of the serving cell and the at least one non-serving cell, obtain a first measurement result, and report it to the first DU through step S404.
  • the terminal device may measure the downlink reference signal of the serving cell according to the reference signal configuration information of the serving cell to obtain a measurement result corresponding to the serving cell. Similarly, the terminal device may also measure the downlink reference signal of each non-serving cell in the at least one non-serving cell according to the reference signal configuration information of the at least one non-serving cell, and obtain the corresponding downlink reference signal of the at least one non-serving cell. measurement results.
  • each DU under the same CU can send configuration information of at least one cell of the DU to the CU.
  • the second DU may send a third configuration message to the CU, where the third configuration message includes a set of configuration information corresponding to at least one cell of the second DU.
  • the second DU is one of the at least one other DU mentioned above that belongs to the same CU as the first DU, and is also the target DU determined hereinafter.
  • the at least one cell includes the target cell determined below, that is, the third configuration message includes a set of configuration information corresponding to the target cell of the second DU.
  • the first DU may also send a fourth configuration message to the CU, where the fourth configuration message includes a set of configuration information corresponding to at least one cell under the first DU, and the at least one cell under the first DU may include a terminal device The current serving cell.
  • the CU can receive the configuration message from each DU under the CU, obtain the configuration information of the at least one non-serving cell according to the configuration message of each DU, and then carry the configuration information of the at least one non-serving cell into the Sent to the first DU in the first configuration message.
  • the third configuration message may be actively sent by the second DU to the CU, or may be sent by the DU in response to the request of the CU after the CU requests the second DU.
  • the fourth configuration message and the configuration messages sent by other DUs to the CU are similar.
  • Step S302 the first DU sends a first request message to the CU, the first request message includes target beam information, the target beam information is determined according to the first measurement result, the target beam information is used for the terminal equipment to perform mobility management, the The first request message is used to request confirmation of target beam information.
  • the CU receives the first request message from the first DU.
  • Step S303 The CU sends a second request message to the second DU, where the second request message includes target beam information, and the second request message is used to request confirmation of the target beam information.
  • the second DU receives the second request message from the CU.
  • the first DU after receiving the first measurement result from the terminal device, the first DU can determine, according to the first measurement result, the target beam information on which the terminal device performs mobility management and/or the target corresponding to the target beam information. community.
  • the target beam information may include uplink target beam information, may also include downlink target beam information, or may include uplink target beam information and downlink target beam information, which is not limited.
  • the first measurement result reported by the terminal device includes measurement results corresponding to cells with multiple DUs, or the K cells measured by the terminal device belong to multiple DUs, the first DU may also be based on multiple DUs.
  • the measurement result corresponding to the cell of the DU determine the target DU, for example, determine the second DU from the multiple DUs as the target DU, the target DU may be the DU associated with the beam with the best signal quality, or the best signal quality Cell-associated DU.
  • the first DU may determine the target beam information and/or the target cell by comparing the measurement results corresponding to each cell in the first measurement result, and then selecting the cell with the best signal quality and the corresponding beam.
  • the first DU may send a first request message to the CU, and notify the CU of the determined target beam information and/or target cell through the first request message.
  • the CU may send a second request message to the second DU, through the second request message, notify the second DU of the target beam information and/or the target cell, and request the second DU to confirm the target beam information and/or target cell.
  • the first request message may include one or more of the following information: target beam information, cell identity of the target cell corresponding to the target beam information, identity information of the second DU, or transmission status information of the terminal device.
  • the second request message may include one or more of the following information: target beam information, cell identity of the target cell corresponding to the target beam information, identity information of the second DU, or transmission status information of the terminal device.
  • the cell identifier of the target cell may be the PCI of the target cell.
  • the identification information of the second DU is used to indicate that the second DU is a target DU, or the target cell is a cell under the second DU.
  • the transmission status information of the terminal device may include one or more of PHY layer status information, RLC layer status information, or MAC layer status information.
  • the PHY layer status information may include status information of the HARQ process being used by the terminal device, and the status information may be, for example, a new data indication (NDI), or it may be used to indicate that the HARQ process is currently in a new packet waiting state. Other parameters for transmission or retransmission of old packets.
  • the RLC layer state information may include the value of the RLC retransmission counter, the window state of the data transmission or reception applicable to the RLC layer, such as the lowest starting position of the window.
  • the value of the RLC retransmission counter is used to indicate the current number of retransmissions of the RRC entity, and the window state of the data transmission or reception applicable to the RLC layer is used to indicate the running state of the RLC layer.
  • the MAC layer status information may include a buffer status report (buffer status report, BSR) trigger status, a value of a counter or a window status used in a related process of the MAC layer, and the like.
  • BSR buffer status report
  • the trigger state of the BSR is used to indicate whether the BSR has been triggered and is in the suspended state
  • the value of the counter or the window state used by the relevant process of the MAC layer is used to indicate the current running state of the MAC layer.
  • the above-mentioned transmission status information is exchanged between the first DU and the second DU, so that the transmission status corresponding to the terminal equipment on the second DU side after the terminal equipment performs mobility management is different from that of the terminal equipment on the first DU side before the terminal equipment performs mobility management.
  • the transmission state corresponding to the device remains consistent, thereby avoiding resetting the protocol layer, effectively saving signaling overhead, and improving the efficiency of mobility management.
  • Step S304 the second DU sends a second response message to the CU, where the second response message is used to indicate whether to accept the target beam information.
  • the CU receives the second response message from the second DU.
  • Step S305 the CU sends a first response message to the first DU, where the first response message is used to indicate whether the target beam information is accepted.
  • the first DU receives the first response message from the CU.
  • the second DU after receiving the second request message from the CU, can obtain the target beam information and/or the target cell therein, determine whether the target beam information and/or the target cell are available, and then decide whether to accept or not.
  • the target beam information and/or the target cell are respectively indicated to the CU and the first DU through the first response message and the second response message.
  • the first response message and the second response message may include identification information of the second DU to indicate that the second DU is the target DU.
  • the second DU can accept the target beam information and/or the target cell, and notify the second DU of the result of the decision to accept the target beam information and/or the target cell through the second response message To the CU, so that the CU notifies the first DU of the result of the second DU's decision to accept the target beam information and/or the target cell through the first response message.
  • the second DU may not accept the target beam information and/or the target cell, and the second DU decides not to accept the target beam information and/or the target cell through the second response message
  • the result of the cell is notified to the CU, so that the CU notifies the first DU of the result that the second DU decides not to accept the target beam information and/or the target cell through the first response message.
  • the second DU may re-determine the target beam information and/or the target cell, and send the updated target beam information and/or the target cell through the second response message.
  • the CU is notified, and the CU then informs the first DU of the updated target beam information and/or target cell through the first response message.
  • the second DU may determine whether the target beam information and/or the target cell are available according to the target beam information and/or the user load of the target cell. For example, if the target beam information and/or the user load of the target cell determined by the first DU is high, the second DU may determine that the target beam information and/or the target cell are unavailable, and indicate that the target beam information and/or the target cell are not accepted. or target cell. Optionally, the second DU may re-determine the target beam information and/or the target cell, thereby updating the target beam information and/or the target cell.
  • the second DU may determine a beam direction that is close to the beam direction indicated by the previous target beam information, or the beam direction indicated by the previous target beam information is a narrow beam, and the updated target beam information of the second DU may indicate a similar beam direction wide beam in the direction, etc.
  • the first DU may also send a first indication message to the terminal device, and the first indication message may include the target The beam information and/or the cell identifier of the target cell corresponding to the target beam information.
  • the first indication message may further include beam information of the serving cell and/or cell identifier of the serving cell.
  • the target beam information and/or the target cell included in the first indication message means that the first DU determines according to the first measurement result. target beam information and/or target cell. If the second DU does not accept the target beam information and/or the target cell determined by the first DU, the first response message and the second response message may include the target beam information and/or the target cell updated by the second DU, and the corresponding , the target beam information and/or the target cell included in the first indication message refers to the target beam information and/or the target cell updated by the second DU.
  • the terminal device may perform mobility management according to the content indicated by the first indication information.
  • the performing mobility management may be performing any one of the following operations:
  • the first indication message includes terminal operation indication information, for example, two-bit information is used to indicate one of the above four operations, exemplarily, 00 represents operation (1), 01 represents operation (2), 10 represents operation (3) and 11 represents operation (4).
  • the terminal operation indication information in the first indication message can be selected by the first DU according to the content of the first measurement result.
  • the terminal operation indication information may instruct the terminal device to switch to the target cell, if the RSRP measurement value of the current serving cell beam is not lower than the set threshold value.
  • the terminal operation indication information can indicate that the terminal equipment still camps on the original serving cell and transmits data through the target cell.
  • the terminal operation indication information in the first indication message can be selected by the CU according to the content of at least one candidate beam information or a measurement result corresponding to the candidate cell.
  • the terminal operation indication information in the first indication message may be selected by the second DU according to at least one candidate beam information or the content of the measurement result corresponding to the candidate cell. This will not be repeated below.
  • the determining that the target cell is the secondary cell may refer to: adding or activating the target cell as the serving cell of the terminal device, or adding the target cell to the serving cell set of the terminal device.
  • the original serving cell is the primary cell in the serving cell set
  • the target cell is the secondary cell in the serving cell set.
  • a carrier aggregation CA can be formed by a serving cell and a target cell to jointly provide services for terminal equipment.
  • camping on the serving cell and performing data transmission through the target cell may refer to: not adding or activating the target cell as a serving cell by means of CA, but using at least one transmission reception point (TRP) of the target cell as a terminal device for data transmission.
  • TRP transmission reception point
  • the serving cell is still the original serving cell, and the data transmission capability is additionally provided only by means of the TRP of the target cell.
  • the terminal equipment may not switch to cell 2, nor add or activate cell 2 as a serving cell, but only pass The preferred beam of cell 2 communicates with cell 2 for data communication.
  • camping on the serving cell and using the beam direction of the target cell performing data transmission through the serving cell may refer to adding or activating the target cell as the serving cell without CA, nor performing data transmission for the terminal equipment through at least one TRP of the target cell.
  • data transmission data transmission is still performed through the original serving cell only according to the beam direction of the TRP of the target cell, thereby providing more choices of beam directions for the terminal device.
  • the serving cell is still the original serving cell, and the reference beam direction is additionally provided only by means of the TRP of the target cell.
  • the terminal device may not switch to cell 2, nor add or activate cell 2. It is a serving cell, but only performs data communication with cell 1 through the preferred beam direction of cell 2.
  • the terminal device can establish a communication connection with the target cell, and communicate with the target cell through the beam direction indicated by the target beam information.
  • the terminal device may disconnect the communication connection with the serving cell, establish a communication connection with the target cell, and then pass the target cell. Communicate with the second DU.
  • the terminal device can temporarily suspend the communication connection with the serving cell without disconnecting the communication connection with the serving cell, for example
  • the TCI status of the serving cell can be saved without releasing the configuration information such as the TCI status of the serving cell, so that when the terminal device switches back to the serving cell again, the communication connection with the serving cell can be restored without re-establishing the communication connection with the serving cell.
  • the communication connection does not need to reconfigure the configuration information such as the TCI state of the serving cell, but directly restores the configuration information such as the TCI state of the serving cell, thereby realizing fast handover and improving handover efficiency.
  • the first DU can schedule resources such as PUSCH and PDSCH of the target cell through the PDCCH of the serving cell, so that the terminal device can communicate with the target cell , in this case, the terminal device can keep the TCI state of the PDCCH, and use the TCI state of the PDSCH and PUSCH of the target cell to align the receiving beam.
  • the terminal device may trigger random access to the target cell, or may not trigger random access to the target cell, and communicate with the target cell directly according to the configuration information of the target cell.
  • the terminal device can determine whether to camp on the serving cell and perform data transmission through the serving cell according to pre-configured rules or autonomous selection, or to perform data transmission through the serving cell. Handover to the target cell, or add or activate the target cell as a secondary cell, or camp on the serving cell and perform data transmission through the target cell, or camp on the serving cell and use the beam direction of the target cell to perform data transmission through the serving cell.
  • the terminal device may make a decision according to the measured signal quality of the downlink reference signal of the serving cell and the signal quality of the downlink reference signal of the target cell.
  • the terminal device can choose to switch to the target cell, or add or activate the target cell as a secondary cell, or Data transmission is carried out with the assistance of the target cell; otherwise, the terminal equipment can camp in the serving cell and continue to carry out data transmission through the serving cell.
  • the signal quality of the reference signal mentioned in this application may be the signal quality of the cell level or the signal quality of the reference signal level, which is not limited.
  • the terminal device may also exchange functions or roles for the serving cell and the target cell.
  • the serving cell is the primary cell of the terminal device
  • the target cell is the secondary cell of the terminal device.
  • the terminal device After the terminal device receives the first indication message, it can assign the serving cell to the serving cell according to the target beam information therein. Change from the primary cell to the secondary cell, and change the target cell from the secondary cell to the primary cell. For example, at least one function and related configuration of the serving cell become invalid, including but not limited to random access, radio link detection, PUCCH resources, etc.; at least one function and related configuration of the target cell become effective, including but not limited to Random access, radio link detection, PUCCH resources, etc.
  • the effective time may be the moment after receiving the first indication message, or it may be the moment after receiving the first indication message plus an offset value, and the offset value may be a protocol agreement or an access network device (such as the first indication message).
  • a DU or CU is configured in advance. For example, at least one function and related configuration of the target cell may take effect after the terminal device receives the at least one beam information and feeds back a successful reception response to the first DU.
  • the first response message and the second response message may further include terminal equipment identification information (for example, C-RNTI) and/or random access resource configuration information allocated to the terminal equipment by the target cell.
  • terminal equipment identification information for example, C-RNTI
  • the first indication message can also include terminal equipment identification information and/or random access resource configuration information allocated to the terminal equipment by the target cell, so that the first DU can forward the terminal equipment identification information and/or random access resource configuration information to the terminal equipment.
  • the possible application scenarios of carrying the terminal device identification information and/or random access resource configuration information allocated by the target cell to the terminal device in the first response message or the second response message or the first indication message include: 1) the first A DU has not provided the terminal equipment with the terminal equipment identification information and/or the random access resource configuration information allocated by the target cell to the terminal equipment before, for example, the second configuration information sent by the first DU to the terminal equipment includes a group corresponding to the target cell configuration information, but the set of configuration information corresponding to the target cell does not include the terminal equipment identification information and/or random access resource configuration allocated by the target cell to the terminal equipment.
  • the terminal equipment identification information and/or random access resource configuration information allocated by the target cell to the terminal equipment are provided to the terminal equipment, but the reserved terminal equipment identification information is no longer available, or the pre-allocated random access information is unavailable.
  • the beam direction corresponding to the incoming resource is too different from the target beam direction of the target cell.
  • the first indication message may be physical layer signaling (for example, PDCCH signaling), or may be a MAC CE message or an RRC layer message, which is not limited in this application.
  • the RRC message may be, for example, an RRC configuration message, an RRC setup message, an RRC recovery message, and the like.
  • the terminal device may perform a PDCP data recovery process, which is used to instruct the PDCP layer to retransmit the data packets that have not received a successful confirmation from the RLC layer.
  • the RLC entity transmits, thereby ensuring that the continuity of PDCP data is not affected by interruption. For example, some PDCP data between the terminal device and the first DU are not successfully sent. Therefore, when the terminal device performs data communication from the target cell of the second DU, it needs to ensure that this part of PDCP data is not lost, so the PDCP data recovery process needs to be triggered.
  • the terminal device does not need to perform the PDCP data recovery process, and may also not perform RLC reset, MAC reset and other processes. Since the first DU sends the transmission status information to the second DU, when the terminal device When the device communicates with the target cell of the second DU, the terminal device can also use the transmission state of the serving cell of the first DU to continue to communicate with the target cell.
  • FIG. 5 is a schematic flowchart of a mobility management method according to an embodiment of the present application.
  • the method includes:
  • Step S501 The first DU receives a first measurement result reported by a terminal device, where the first measurement result includes measurement results corresponding to K cells, where K is a positive integer.
  • step S501 For the specific implementation of the step S501, reference may be made to the relevant description of the step S301 above, which will not be repeated here.
  • Step S502 the first DU sends a first request message to the CU, where the first request message includes at least one candidate beam information, the at least one candidate beam information is determined according to the first measurement result, and the first request message is used to request
  • the at least one candidate beam information determines target beam information, where the target beam information is used for the terminal device to perform mobility management.
  • the CU receives the first request message from the first DU.
  • the first DU may determine the at least one candidate beam information and/or the information of the at least one candidate beam according to the measurement results corresponding to the K cells in the first measurement result.
  • the candidate cell corresponding to at least one candidate beam information For example, the first DU may determine, according to the measurement results corresponding to the K cells, M candidate beams with better signal quality, and L candidate cells corresponding to the M candidate beams, where M and L are both positive integers.
  • the first DU may send a first request message to the CU, so as to request to determine the target beam information and/or the candidate cell corresponding to the at least one candidate beam information in the first request message and/or the at least one candidate beam information target cell.
  • the first request message may explicitly indicate to request the CU or the second DU to determine the target beam information and/or the target cell, or may not explicitly indicate to request the CU or the second DU to determine the target beam information and/or the target cell, Instead, it is up to the CU to determine whether the CU determines the target beam information and/or the target cell, or the second DU determines the target beam information and/or the target cell. Understandably, the CU determines the target beam information and/or the target cell corresponds to the second solution, and the second DU determines the target beam information and/or the target cell corresponds to the third solution introduced below.
  • the first request message may include one or more of the following information: the at least one candidate beam information, the cell identity of the candidate cell corresponding to the at least one candidate beam information, the identity information of the second DU, the terminal device's identity information. Transmission state information or a measurement result corresponding to the at least one candidate beam information.
  • the measurement result corresponding to the at least one candidate beam information refers to the measurement result obtained by the terminal device by measuring the downlink reference signal corresponding to the at least one beam information, and the measurement result may be CSI, such as RSRP, which is used to indicate that the reference signal is received indicator of quality. It can be understood that the measurement result information corresponding to the at least one candidate beam information is included in the first measurement result.
  • Step S503 the CU determines target beam information according to at least one candidate beam information.
  • Step S504 The CU sends a second request message to the second DU, where the second request message includes target beam information, and the second request message is used to request the second DU to confirm the target beam information.
  • the second DU receives the second request message from the CU.
  • the second request message includes one or more of the following information: target beam information, a cell identity of a target cell corresponding to the target beam information, identity information of the second DU, or transmission status information of the terminal device.
  • the CU may determine the target beam information and/or the target cell according to at least one candidate beam information and/or a candidate cell corresponding to the at least one candidate beam information , and then send a second request message to the second DU.
  • the CU may be based on a radio resource management (radio resource management, RRM) algorithm or a beam management algorithm, for example, considering the load conditions of different beams, from at least one candidate beam information and/or the candidate cell corresponding to the at least one candidate beam information.
  • the target beam information and/or the target cell are determined.
  • the first request message includes beam 2 of cell 1 and beam 5 of cell 2. If the CU determines that the number of users in the direction of beam 2 of cell 1 is large and the load is heavy, the CU can determine to preferentially switch to the beam of cell 2 5.
  • the CU may also use the measurement result corresponding to the at least one candidate beam information make further judgments.
  • the CU may also determine the target DU according to the measurement result corresponding to the at least one candidate beam information, for example, determine the second DU as the target DU.
  • Step S505 The second DU sends a second response message to the CU, where the second response message is used to indicate whether to accept the target beam information.
  • the CU receives the second response message from the second DU.
  • Step S506 the CU sends a first response message to the first DU, where the first response message includes target beam information.
  • the first DU receives the first response message from the CU.
  • the second DU can determine whether the target beam information and/or the target cell corresponding to the target beam information is available, and then decide whether to accept the target beam information and/or the target cell corresponding to the target beam information, and send a second response message to the CU.
  • the second response message may be used to indicate that the target beam information and/or the target cell are accepted.
  • the first response message may Including the target beam information and/or the cell identifier of the target cell corresponding to the target beam information.
  • the second response message may be used to indicate that the target beam information and/or the target cell are not accepted.
  • the second DU may further update the target beam information, and/or determine the target cell corresponding to the updated target beam information.
  • the second response message may also include the updated target beam information and/or the cell identifier of the target cell corresponding to the updated target beam information
  • the first response message may also include the updated target beam information and/or the cell identifier of the target cell corresponding to the updated target beam information.
  • the first DU may also send a first indication message to the terminal device, so that the terminal device can send the first indication message according to the first indication message.
  • the second solution of the embodiment of the present application provides a mobility management process on the access network side, in which the first DU can determine at least one candidate beam information and/or information according to the first measurement result reported by the terminal device. or the candidate cell corresponding to the at least one candidate beam information, and notify the at least one candidate beam information and/or the candidate cell corresponding to the at least one candidate beam information to the CU, so that the CU can use the at least one candidate beam information and/or the
  • the candidate cell corresponding to the at least one candidate beam information determines the target beam information and/or the target cell, and requests the second DU to confirm whether the above-mentioned target beam information and/or the target cell is available.
  • the CU determines the target beam information and/or the target cell for the terminal equipment to perform mobility management, which enables the CU to manage and schedule cells of each DU belonging to the CU in a unified manner, and enables the access network side
  • the first DU, CU and second DU can maintain the consistency of the target beam information and/or target cell decision for the terminal equipment to perform mobility management, support the terminal equipment to perform fast mobility management, and realize the fast beam to the target cell. Align.
  • FIG. 6 is a schematic flowchart of a mobility management method provided by an embodiment of the present application.
  • the method includes:
  • Step S601 The first DU receives a first measurement result reported by a terminal device, where the first measurement result includes measurement results corresponding to K cells, where K is a positive integer.
  • step S601 For the specific implementation of the step S601, reference may be made to the relevant description of the step S301 above, which will not be repeated here.
  • Step S602 the first DU sends a first request message to the CU, where the first request message includes at least one candidate beam information, the at least one candidate beam information is determined according to the first measurement result, and the first request message is used to request
  • the at least one candidate beam information determines target beam information, where the target beam information is used for the terminal device to perform mobility management.
  • the CU receives the first request message from the first DU.
  • the first request message may include one or more of the following information: the at least one candidate beam information, the cell identity of the candidate cell corresponding to the at least one candidate beam information, the identity information of the second DU, the terminal device's identity information. Transmission state information or a measurement result corresponding to the at least one candidate beam information.
  • step S602 For the specific implementation of the step S602, reference may be made to the relevant description of the step S503 above, which will not be repeated here.
  • Step S603 The CU sends a second request message to the second DU, where the second request message includes the at least one candidate beam information, and the second request message is used to request to determine the target beam information according to the at least one candidate beam information.
  • the second DU receives the second request message from the CU.
  • the second request message may include one or more of the following information: the at least one candidate beam information, the cell identity of the candidate cell corresponding to the at least one candidate beam information, the identity information of the second DU, the terminal device's identity information. Transmission state information or a measurement result corresponding to the at least one candidate beam information.
  • the CU after receiving the first request message from the first DU, the CU can determine that the second DU determines the target beam information and/or the target cell for the terminal equipment to perform mobility management, and then puts the first request message in the first request message. The carried information is notified to the second DU through the second request message.
  • the CU may also determine the target DU according to the measurement result corresponding to the at least one candidate beam information, for example, determine the second DU as the target DU, and then send the information to the target DU.
  • the second DU sends a second request message.
  • Step S604 The second DU determines target beam information and/or target cell according to the at least one candidate beam information.
  • the second DU may determine the target beam information and/or the target beam information according to the at least one candidate beam information and/or the candidate cell corresponding to the at least one candidate beam information The target cell corresponding to the target beam information.
  • the second DU may be based on the RRM algorithm or the beam management algorithm, for example, considering the load conditions of different beams, or in combination with the signal quality of the uplink reference signal sent by the terminal device to the second DU, from the information of the at least one candidate beam. and/or among the candidate cells corresponding to the at least one candidate beam information, determine the target beam information and/or the target cell corresponding to the target beam information.
  • the first request message includes beam 2 of cell 1 and beam 5 of cell 2. If the CU determines that the number of users in the direction of beam 2 of cell 1 is large and the load is heavy, the CU can determine to preferentially switch to the beam of cell 2 5.
  • the second DU can also determine the target beam information according to the at least one candidate beam information. Measurement results for further judgment.
  • Step S605 the second DU sends a second response message to the CU, where the second response message includes target beam information.
  • the CU receives the second response message from the second DU.
  • the second DU may notify the CU of the target beam information determined by the second DU and/or the target cell corresponding to the target beam information through the second response message. That is, the second response message may include the target beam information determined by the second DU and/or the cell identifier of the target cell corresponding to the target beam information.
  • Step S606 the CU sends a first response message to the first DU, where the first response message includes target beam information.
  • the first DU receives the first response message from the CU.
  • the CU may notify the first DU of the target beam information determined by the second DU and/or the target cell corresponding to the target beam information through the first response message. That is, the first response message may include the target beam information determined by the second DU and/or the cell identifier of the target cell corresponding to the target beam information.
  • the first DU can also send a first indication message to the terminal device, so that the terminal device can send the first indication message according to the first indication message.
  • the third solution of the embodiments of the present application provides a mobility management process on the access network side, wherein the first DU can determine at least one candidate beam information and /or the candidate cell corresponding to the at least one candidate beam information, and notify the CU of the at least one candidate beam information and/or the candidate cell corresponding to the at least one candidate beam information, and the CU will then notify the at least one candidate beam information and/or the candidate cell to the CU. Or the candidate cell corresponding to the at least one candidate beam information is notified to the second DU.
  • the second DU may be based on the at least one candidate beam information and/or the candidate cell corresponding to the at least one candidate beam information, in combination with the load of the second DU's own cell or the signal quality of the uplink reference signal sent by the terminal device to the second DU , determine the appropriate target beam information and/or the target cell corresponding to the target beam information, which can help achieve load balancing of the target cell, and enable the first DU, CU and second DU on the access network side to maintain
  • the consistency of target beam information and/or target cell decision for the device to perform mobility management supports the terminal device to perform fast mobility management and achieve fast beam alignment to the target cell.
  • the embodiment of the present application further provides another mobility management method, which is used for the terminal device and the target cell of the second DU to confirm the timing of executing the mobility management, so that the terminal device and the second DU are in agreement about the timing of executing the mobility management.
  • the understanding is kept consistent to avoid unnecessary data interruption due to the second DU being unclear about the timing of the terminal equipment performing mobility management.
  • a possible implementation manner of the mobility management method includes the following process:
  • Step S701 The first DU sends a first indication message to the terminal device, where the first indication message includes target beam information and/or a cell identifier of a target cell corresponding to the target beam information.
  • the terminal device receives the first indication message from the first DU.
  • Step S702 The terminal device sends feedback information to the second DU, where the feedback information indicates that the terminal device successfully received the first indication message.
  • the second DU receives feedback information from the terminal device.
  • the feedback information may be ACK information, indicating that the terminal device successfully receives the first indication message, which is used to notify the second DU terminal device of the timing of performing mobility management, that is, the terminal device uses the target cell configuration information to communicate time.
  • the "successful reception" can also be understood as meanings such as successful decoding or decoding.
  • a period of effective time can be configured to the terminal equipment by the network side configuration, for example, x timeslots, the terminal equipment starts to use the x timeslots after sending the feedback information.
  • Target cell configuration information for the timing for the terminal equipment to perform mobility management.
  • the ACK information may be sent through PUCCH resources.
  • the second configuration message sent by the first DU to the terminal device includes the PUCCH resource configuration information of the target cell, then the terminal device may, according to the PUCCH resource configuration information of the target cell, configure the PUCCH resource On the PUCCH resource indicated by the configuration information, send ACK information to the second DU, so that the second DU knows that the terminal device will perform mobility management, such as switching to the target cell, or adding or activating the target cell as a serving cell, or Data transmission and so on will be carried out with the aid of the target cell.
  • step 702 may be an optional step.
  • the terminal device starts to use the target cell configuration information after x timeslots when the first indication message is sent/received.
  • the second DU may consider that the terminal device starts to use the target cell configuration information after x timeslots when the first indication message is sent/received. In this way, based on the above configuration or agreement, the step of sending/receiving feedback information can be omitted between the terminal device and the second DU.
  • the second DU may also send a second indication message to the CU to notify the CU that: the second DU Confirm that the terminal device has received the first indication message and will establish data communication with the target cell of the second DU.
  • the CU can determine, according to the second indication message, that the terminal device has completed the mobility management to the target beam information and/or the target cell.
  • the CU may also send a response message corresponding to the second indication message to the second DU to notify the first Two DUs: The CU confirms that the second indication message is received, or the CU confirms that the terminal device receives the first indication message, and will establish data communication with the target cell of the second DU.
  • the terminal device may send feedback information to the first DU, where the feedback information may be NACK information to indicate that the terminal device fails to receive the first indication message successfully.
  • the NACK information can be sent through the PUCCH resource.
  • the terminal device can send the NACK information to the first DU on the PUCCH resource indicated by the PUCCH resource configuration information according to the PUCCH resource configuration information of the current serving cell, so that the first DU can be based on the PUCCH resource configuration information of the current serving cell.
  • the NACK information retransmits the first indication message.
  • FIG. 8 another possible implementation manner of the mobility management method includes the following process:
  • Step S801 The first DU sends a first indication message to the terminal device, where the first indication message includes target beam information and/or a cell identifier of a target cell corresponding to the target beam information.
  • the terminal device receives the first indication message from the first DU.
  • Step S802 The terminal device sends a random access preamble to the second DU, where the random access preamble is used by the second DU to confirm that the terminal device has successfully received the first indication message.
  • the second DU receives the random access preamble from the terminal device.
  • the random access preamble is included in the random access resource configuration information of the target cell, and is used by the terminal device to initiate a random access procedure to the target cell. If the second DU receives the random access preamble, it can be considered that the terminal device has established a communication connection with the target cell and can perform data communication. As described above, the random access resource configuration information of the target cell may be sent to the terminal device through the second configuration message or the first indication message, and details are not repeated here.
  • the terminal device may not respond, and if the network side does not receive a response within a period of time, the first indication message may be resent.
  • the second DU may notify the first DU to resend the first indication message.
  • the terminal device may send a response to instruct the network to retransmit the message.
  • the terminal device may send a response to the first DU, so that the first DU re-sends the first indication message.
  • Step S803 the second DU sends a random access response (random access response, RAR) to the terminal device, where the RAR responds to the random access preamble.
  • RAR random access response
  • the terminal device receives the RAR from the second DU.
  • the RAR may include one or more of the following information: uplink authorized resources of the target cell, terminal equipment identification information allocated to the terminal equipment by the target cell, and TA information corresponding to the target cell.
  • the uplink grant resource is used for subsequent data transmission between the terminal device and the target cell.
  • the terminal equipment identification information is used to identify the terminal equipment in the target cell. It should be noted that if the second configuration message or the first indication message includes the terminal equipment identification information (for example, C-RNTI) allocated by the target cell for the terminal equipment, the RAR may include the terminal device identification information reassigned by the target cell for the terminal device (for example, the previously allocated terminal device identification information may be unavailable), or may not include the terminal device identification information.
  • the TA information is used to indicate the timing advance used by the terminal equipment when the target cell performs uplink transmission, so that the target cell can perform time domain alignment when receiving the uplink signal.
  • the random access preamble may be a contention-based random access preamble.
  • the random preamble is a contention-based random access preamble
  • the DU sends a third indication message, where the third indication message is used to notify the second DU that the terminal device accesses the target cell of the second DU.
  • the third indication message may include terminal equipment identification information allocated to the terminal equipment by the target cell, so that the second DU identifies the terminal equipment to access the target cell according to the terminal equipment identification information.
  • the third indication message may be a MAC CE message.
  • the method shown in FIG. 7 or FIG. 8 can enable the second DU to determine the timing for the terminal equipment to perform mobility management, so as to use the target beam of the target cell to perform data communication with the terminal equipment, Avoid data outages.
  • FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 900 includes a transceiver module 910 and a processing module 920 .
  • the communication apparatus may also be used to implement the functions related to the first DU or the CU or the second DU in any of the foregoing method embodiments.
  • the communication device may be a first DU, or a CU, or a second DU, or a chip or circuit included in the first DU, or a chip or circuit included in the CU, or a chip or circuit included in the second DU.
  • the transceiver module 910 is configured to receive the first measurement result reported by the terminal device, the first measurement result. Including measurement results corresponding to K cells, the K cells include the current serving cell of the terminal device and at least one non-serving cell, and K is a positive integer; the processing module 920 is used for determining target beam information according to the first measurement result; sending and receiving The module 910 is further configured to: send a first request message to the CU, where the first request message includes target beam information, and the target beam information is used for the terminal device to perform mobility management; and receive a first response message from the CU, the A response message is used to indicate whether the target beam information is accepted.
  • the transceiver module 910 is configured to: receive a first request message from the first DU, where the first request message includes target beam information , the target beam information is used for the terminal equipment to perform mobility management; send a second request message to the second DU, where the second request message includes the target beam information, and the second request message is used to request the second DU to confirm the target beam information ; receive a second response message from the second DU, the second response message indicates whether the target beam information is accepted; send a first response message to the first DU, the first response message indicates whether the target beam information is accepted.
  • the transceiver module 910 is configured to receive a second request message from the CU, where the second request message includes target beam information , the target beam information is used for the terminal device to perform mobility management, and the second request message is used to request the second DU to confirm the target beam information; the processing module 920 is used to determine whether to accept the target beam information; the transceiver module 910 is also used to: Send a second response message to the CU, where the second response message is used to indicate whether to accept the target beam information.
  • the transceiver module 910 is configured to receive the first measurement result reported by the terminal equipment, where the first measurement result includes K cells Corresponding measurement results, the K cells include the current serving cell of the terminal device and at least one non-serving cell, and K is a positive integer; the processing module 920 is used to determine at least one candidate beam information according to the first measurement result; the transceiver module 910 is also used for: sending a first request message to the CU, where the first request message includes at least one candidate beam information, the first request message is used to request to determine target beam information according to the at least one candidate beam information, the target beam information for the terminal device to perform mobility management; and receive a first response message from the CU, where the first response message includes target beam information.
  • the transceiver module 910 is configured to: the CU receives a first request message from the first DU, where the first request message includes at least one candidate beam information, the first request message is used to request to determine target beam information according to the at least one candidate beam information, and the target beam information is used for the terminal device to perform mobility management; the processing module 920 is configured to, according to the at least one candidate beam information The beam information determines the target beam information; the transceiver module 910 is further configured to: send a second request message to the second DU, where the second request message includes the target beam information, and the second request message is used to request the second DU to confirm the target beam information ; receive a second response message from the second DU, where the second response message is used to indicate whether the target beam information is accepted; and send a first response message to the first DU, where the first response message includes the target beam information.
  • the transceiver module 910 is configured to receive a second request message from the CU, where the second request message includes target beam information , the target beam information is used for the terminal device to perform mobility management, and the second request message is used to request the second DU to confirm the target beam information; the processing module 920 is used to determine whether to accept the target beam information; the transceiver module 910 is also used to: Send a second response message to the CU, where the second response message is used to indicate whether to accept the target beam information.
  • the transceiver module 910 is configured to receive the first measurement result reported by the terminal equipment, where the first measurement result includes K cells Corresponding measurement results, the K cells include the current serving cell and at least one non-serving cell of the terminal device, and K is a positive integer; the processing module 920 is configured to determine at least one candidate beam information according to the first measurement result; Module 910 is further configured to: send a first request message to the CU, where the first request message includes at least one candidate beam information, the first request message is used to request to determine target beam information according to the at least one candidate beam information, the target beam information The beam information is used for the terminal device to perform mobility management; and a first response message from the CU is received, where the first response message includes target beam information.
  • the transceiver module 910 is configured to: receive a first request message from the first DU, where the first request message includes at least one candidate Beam information, the first request message is used to request to determine target beam information according to the at least one candidate beam information, the target beam information is used for the terminal device to perform mobility management; send a second request message to the second DU, the second The request message includes the at least one candidate beam information, and the second request message is used to request to determine the target beam information according to the at least one candidate beam information; receive a second response message from the second DU, the second response message contains Including target beam information; sending a first response message to the first DU, where the first response message includes target beam information.
  • the transceiver module 910 is configured to receive a second request message from the CU, where the second request message includes at least one candidate beam information, where the second request message is used to request to determine target beam information according to the at least one candidate beam information, where the target beam information is used for the terminal device to perform mobility management; the processing module 920 is configured to, according to the at least one candidate beam information The information determines target beam information; the transceiver module 910 is further configured to send a second response message to the CU, where the second response message includes the target beam information.
  • the processing module 920 involved in the communication apparatus may be implemented by at least one processor or a processor-related circuit component, and the transceiver module 910 may be implemented by at least one transceiver or a transceiver-related circuit component or a communication interface.
  • the operations and/or functions of the various modules in the communication device are respectively to implement the corresponding processes of the methods shown in FIG. 3 to FIG. 8 , and are not repeated here for brevity.
  • the communication device may further include a storage module, which may be used to store data and/or instructions, and the transceiver module 910 and/or the processing module 920 may read the data and/or instructions in the access module, Thereby, the communication device can implement the corresponding method.
  • the memory module can be implemented, for example, by at least one memory.
  • the above-mentioned storage module, processing module, and transceiver module may exist separately, or all or part of the modules may be integrated, for example, the storage module and the processing module are integrated, or the processing module and the transceiver module are integrated.
  • FIG. 10 is another schematic structural diagram of a communication device provided in an embodiment of the present application.
  • the communication apparatus may be specifically a DU in an access network device, and is configured to implement the functions related to the first DU or the second DU in any of the foregoing method embodiments.
  • the DU 1000 may include at least one antenna 10011, at least one radio frequency unit 10012, at least one processor 10013 and at least one memory 10014.
  • the DU 1000 is mainly used for the transceiver of radio frequency signals, the conversion of radio frequency signals and baseband signals, and part of baseband processing.
  • the DU 1000 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as a 5G network) with a single access indication, or may support different access standards respectively wireless access network (such as LTE network, 5G network or other networks).
  • the memory 10014 and processor 10013 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.
  • FIG. 11 is another schematic structural diagram of a communication device provided in an embodiment of the present application.
  • the communication apparatus may specifically be a CU in an access network device, and is configured to implement the functions related to the CU in any of the foregoing method embodiments.
  • the CU 1100 may include at least one memory 11021 and at least one processor 11022.
  • the CU 1100 is mainly used to perform baseband processing, control base stations, and the like.
  • the CU 1100 is the control center of the base station, and may also be referred to as a processing unit.
  • the CU 1100 may be used to control the base station to perform the operations or steps corresponding to the CU in the methods shown in the foregoing FIG. 3 to FIG. 8 .
  • the CU 1100 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network (such as a 5G network) with a single access indication, or may support different access standards respectively.
  • wireless access network such as LTE network, 5G network or other networks.
  • the memory 11021 and the processor 11022 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.
  • An embodiment of the present application further provides a chip system, including: a processor, where the processor is coupled with a memory, the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor, the The chip system implements the method corresponding to the first DU or the CU or the second DU in any of the foregoing method embodiments.
  • the number of processors in the chip system may be one or more.
  • the processor can be implemented by hardware or by software.
  • the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor may be a general-purpose processor implemented by reading software codes stored in memory.
  • the memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application.
  • the memory can be a non-transitory processor, such as a read-only memory ROM, which can be integrated with the processor on the same chip, or can be provided on different chips.
  • the setting method of the processor is not particularly limited.
  • the system-on-chip may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC), It can also be a central processing unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), or a microcontroller (microcontroller).
  • controller unit, MCU it can also be a programmable logic device (PLD) or other integrated chips.
  • each step in the above method embodiments may be implemented by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the method steps disclosed in conjunction with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.
  • Embodiments of the present application further provide a computer-readable storage medium, where computer-readable instructions are stored in the computer storage medium, and when the computer reads and executes the computer-readable instructions, the computer is made to execute any of the foregoing method embodiments method in .
  • Embodiments of the present application further provide a computer program product, which, when the computer reads and executes the computer program product, causes the computer to execute the method in any of the above method embodiments.
  • An embodiment of the present application further provides a communication system, where the communication system includes a first DU, a CU, and a second DU.
  • the first DU, the CU, and the second DU cooperate with each other to implement the method in any of the foregoing method embodiments.
  • the communication system may further include a terminal device.
  • processors mentioned in the embodiments of the present application may be a CPU, other general-purpose processors, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • many forms of RAM are available, such as static random access memory, dynamic random access memory, synchronous dynamic random access memory, double data rate synchronous dynamic random access memory, enhanced synchronous dynamic random access memory Random Access Memory, Synchronous Attached Dynamic Random Access Memory, and Direct Memory Bus Random Access Memory.
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module
  • memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, and other media that can store program codes.

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Abstract

本申请提供一种移动性管理方法及通信装置，其中方法包括：第一DU接收终端设备上报的第一测量结果，根据该第一测量结果确定终端设备执行移动性管理的目标波束信息和/或该目标波束信息对应的目标小区，并将该目标波束信息和/或目标小区通知给CU，通过CU请求第二DU确认是否接受目标波束信息和/或目标小区，所述第一测量结果中包括终端设备当前的服务小区和至少一个非服务小区对应的测量结果。上述方法可在接入网设备采用CU-DU分离架构，且考虑终端设备在不同DU的小区间的移动性时，使得第一DU与第二DU保持对目标波束信息决策的一致性，支持终端设备实现快速的移动性管理和波束管理。

Description

一种移动性管理方法及通信装置
相关申请的交叉引用
本申请要求在2021年04月28日提交中国国家知识产权局、申请号为202110469499.0、申请名称为“一种移动性管理方法及通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，尤其涉及一种移动性管理方法及通信装置。
背景技术
在高频波束赋型的场景下，由于终端设备移动以及波束覆盖范围受限，终端设备需要频繁地进行小区切换。然而，目前的波束管理机制无法对终端设备的移动性过程涉及的目标小区进行有效的波束管理。因此，往往需要终端设备先执行移动性过程，再执行目标小区的波束管理过程。上述移动性过程和波束管理过程不仅会造成终端设备较长的业务中断，并且无法快速匹配终端设备移动以及实现波束的快速对齐，也有可能造成错误的切换判决和较长的波束训练过程。
发明内容
本申请提供一种移动性管理方法及通信装置，用于在接入网设备采用集中式单元CU-分布式单元DU分离架构，且考虑终端设备在不同DU的小区间的移动性时，使得源DU与目标DU保持对目标波束信息决策的一致性，支持终端设备实现快速的移动性管理和波束管理。
第一方面，本申请实施例提供一种移动性管理方法，该方法可由第一DU执行，也可以由配置于第一DU的部件(例如芯片或者电路)执行。可选的，第一DU可以是终端设备在执行移动性管理时的源DU。
所述方法包括：第一DU接收终端设备上报的第一测量结果，该第一测量结果包括K个小区对应的测量结果，所述K个小区包括终端设备当前的服务小区和至少一个非服务小区，K为正整数；第一DU向CU发送第一请求消息，该第一请求消息中包括目标波束信息，该目标波束信息根据第一测量结果确定，该目标波束信息用于终端设备执行移动性管理；第一DU接收来自CU的第一响应消息，该第一响应消息用于指示目标波束信息是否被接受。
在第一方面的一种可能的设计中，第一请求消息中还包括以下一项或多项信息：目标波束信息对应的目标小区的小区标识、第二DU的标识信息或终端设备的传输状态信息，所述目标小区为第二DU的小区。
上述技术方案提供了一种接入网侧的移动性管理流程，其中第一DU可以根据终端设备上报的第一测量结果，确定终端设备执行移动性管理的目标波束信息和/或该目标波束信息对应的目标小区，并将该目标波束信息和/或目标小区通知给CU，通过CU请求第二DU确认上述目标波束信息和/或目标小区是否可用。
该技术方案具体由第一DU确定终端设备进行移动性管理的目标波束信息和/或目标小 区，可有效减少CU与DU之间的信令开销，并且使得接入网侧的第一DU、CU和第二DU可保持对终端设备进行移动性管理的目标波束信息和/或目标小区决策的一致性，支持终端设备进行快速的移动性管理，实现到目标小区的快速波束对齐。
在第一方面的一种可能的设计中，若目标波束信息不被接受，第一响应消息中包括更新后的目标波束信息和/或该更新后的目标波束信息对应的目标小区的小区标识。
在第一方面的一种可能的设计中，所述方法还包括：第一DU向终端设备发送第一指示消息，该第一指示消息中包括目标波束信息和/或目标波束信息对应的目标小区的小区标识。
在第一方面的一种可能的设计中，所述方法还包括：第一DU接收来自CU的第一配置消息，该第一配置消息中包括所述至少一个非服务小区对应的一组配置信息；第一DU向终端设备发送第二配置消息，该第二配置消息中包括所述至少一个非服务小区对应的一组配置信息。
在第一方面的一种可能的设计中，一组配置信息包括对应小区的以下一项或多项配置信息：参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
第二方面，本申请实施例提供一种移动性管理方法，该方法可由CU执行，也可以由配置于CU的部件(例如芯片或者电路)执行。
所述方法包括：CU接收来自第一DU的第一请求消息，该第一请求消息中包括目标波束信息，该目标波束信息用于终端设备执行移动性管理；CU向第二DU发送第二请求消息，该第二请求消息中包括目标波束信息，该第二请求消息用于请求第二DU确认目标波束信息；CU接收来自第二DU的第二响应消息，该第二响应消息指示目标波束信息是否被接受；CU向第一DU发送第一响应消息，该第一响应消息指示目标波束信息是否被接受。
在第二方面的一种可能的设计中，第一请求消息还包括以下一项或多项信息：目标波束信息对应的目标小区的小区标识、第二DU的标识信息或终端设备的传输状态信息；第二请求消息中还包括以下一项或多项信息：目标波束信息对应的目标小区的小区标识、第二DU的标识信息或终端设备的传输状态信息，所述目标小区为第二DU的小区。
在第二方面的一种可能的设计中，若目标波束信息不被接受，第一响应消息中包括更新后的目标波束信息和/或该更新后的目标波束信息对应的目标小区的小区标识；第二响应消息中包括更新后的目标波束信息和/或该更新后的目标波束信息对应的目标小区的小区标识。
在第二方面的一种可能的设计中，所述方法还包括：CU接收来自第二DU的第三配置消息，该第三配置消息中包括目标小区对应的一组配置信息；CU向第一DU发送第一配置消息，该第一配置消息中包括终端设备的至少一个非服务小区对应的一组配置信息。
在第二方面的一种可能的设计中，每组配置信息包括对应小区的以下一项或多项配置信息：参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源 集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
第三方面，本申请实施例提供一种移动性管理方法，该方法可由第二DU执行，也可以由配置于第二DU的部件(例如芯片或者电路)执行。可选的，第二DU可以是终端设备在执行移动性管理时的目标DU。
该方法包括：第二DU接收来自CU的第二请求消息，该第二请求消息中包括目标波束信息，该目标波束信息用于终端设备执行移动性管理，该第二请求消息用于请求第二DU确认目标波束信息；第二DU向CU发送第二响应消息，该第二响应消息用于指示是否接受目标波束信息。
在第三方面的一种可能的设计中，第二请求消息中还包括以下一项或多项信息：目标波束信息对应的目标小区的小区标识、第二DU的标识信息或终端设备的传输状态信息，所述目标小区为第二DU的小区。
在第三方面的一种可能的设计中，若第二DU不接受目标波束信息，第二响应消息中包括第二DU更新后的目标波束信息和/或该更新后的目标波束信息对应的目标小区的小区标识。
在第三方面的一种可能的设计中，所述方法还包括：第二DU向CU发送第三配置消息，该第三配置消息中包括目标小区对应的一组配置信息。
在第三方面的一种可能的设计中，所述一组配置信息包括目标小区的以下一项或多项配置信息：参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
在第三方面的一种可能的设计中，所述方法还包括：第二DU接收来自终端设备的反馈信息，该反馈信息指示终端设备成功接收第一指示消息，该第一指示消息中包括目标波束信息和/或目标波束信息对应的目标小区的小区标识。
在第三方面的一种可能的设计中，所述方法还包括：第二DU根据目标小区对应的物理上行控制信道PUCCH资源配置信息，接收反馈信息。
第二方面和第三方面的一种可能的设计中的有益效果，可参考第一方面中的对应描述，不再赘述。
第四方面，本申请实施例提供一种移动性管理方法，该方法可由第一DU执行，也可以由配置于第一DU的部件(例如芯片或者电路)执行。可选的，第一DU可以是终端设备在执行移动性管理时的源DU。
所述方法包括：第一DU接收终端设备上报的第一测量结果，该第一测量结果包括K个小区对应的测量结果，所述K个小区包括终端设备当前的服务小区和至少一个非服务小区，K为正整数；第一DU向CU发送第一请求消息，该第一请求消息中包括至少一个候 选波束信息，该至少一个候选波束信息根据第一测量结果确定，该第一请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理；第一DU接收来自CU的第一响应消息，该第一响应消息中包括目标波束信息。
在第四方面的一种可能的设计中，第一请求消息中还包括以下一项或多项信息：所述至少一个候选波束信息对应的候选小区的小区标识、第二DU的标识信息、终端设备的传输状态信息或所述至少一个候选波束信息对应的测量结果；第一响应消息中还包括目标波束信息对应的目标小区的小区标识，所述目标小区为第二DU的小区。
上述技术方案提供了一种接入网侧的移动性管理流程，其中第一DU可以根据终端设备上报的第一测量结果，确定至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区，并将该至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区通知给CU，以便CU根据该至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区确定目标波束信息和/或目标小区，并请求第二DU确认上述目标波束信息和/或目标小区是否可用。
该技术方案具体由CU来确定终端设备进行移动性管理的目标波束信息和/或目标小区，可使得CU能够对属于该CU的各个DU的小区进行统一的管理和调度，并且使得接入网侧的第一DU、CU和第二DU可保持对终端设备进行移动性管理的目标波束信息和/或目标小区决策的一致性，支持终端设备进行快速的移动性管理，实现到目标小区的快速波束对齐。
在第四方面的一种可能的设计中，所述方法还包括：第一DU向终端设备发送第一指示消息，该第一指示消息中包括目标波束信息和/或该目标波束信息对应的目标小区的小区标识。
在第四方面的一种可能的设计中，所述方法还包括：第一DU接收来自CU的第一配置消息，该第一配置消息中包括所述至少一个非服务小区对应的一组配置信息；第一DU向终端设备发送第二配置消息，该第二配置消息中包括所述至少一个非服务小区对应的一组配置信息。
在第四方面的一种可能的设计中，所述一组配置信息包括对应小区的以下一项或多项配置信息：参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
第五方面，本申请实施例提供一种移动性管理方法，该方法可由CU执行，也可以由配置于CU的部件(例如芯片或者电路)执行。
所述方法包括：CU接收来自第一DU的第一请求消息，该第一请求消息中包括至少一个候选波束信息，该第一请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理；CU向第二DU发送第二请求消息，该第二请求消息中包括目标波束信息，该第二请求消息用于请求第二DU确认目标波束信息；CU接收来自第二DU的第二响应消息，该第二响应消息用于指示目标波束信息是否被接受；CU向第一DU发送第一响应消息，该第一响应消息中包括目标波束信息。
在第五方面的一种可能的设计中，第一请求消息中还包括以下一项或多项信息：所述至少一个候选波束信息分别对应的候选小区的小区标识、第二DU的标识信息、终端设备的传输状态信息或所述至少一个候选波束信息对应的测量结果，目标小区为第二DU的小区；第二请求消息中还包括以下一项或多项信息：目标波束信息对应的目标小区的小区标识、第二DU的标识信息或终端设备的传输状态信息；第一响应消息中还包括目标波束信息对应的目标小区的小区标识。
在第五方面的一种可能的设计中，若目标波束信息不被接受，则第一响应消息中包括更新后的目标波束信息和/或该更新后的目标波束信息对应的目标小区的小区标识；第二响应消息中包括更新后的目标波束信息和/或该更新后的目标波束信息对应的目标小区的小区标识。
在第五方面的一种可能的设计中，所述方法还包括：CU接收来自第二DU的第三配置消息，该第三配置消息中包括目标小区对应的一组配置信息；CU向第一DU发送第一配置消息，稿第一配置消息中包括终端设备的至少一个非服务小区对应的一组配置信息。
在第五方面的一种可能的设计中，每组配置信息包括对应小区的以下一项或多项配置信息：参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
第六方面，本申请实施例提供一种移动性管理方法，该方法可由第二DU执行，也可以由配置于第二DU的部件(例如芯片或者电路)执行。可选的，第二DU可以是终端设备在执行移动性管理时的目标DU。
所述方法包括：第二DU接收来自CU的第二请求消息，该第二请求消息中包括目标波束信息，该目标波束信息用于终端设备执行移动性管理，该第二请求消息用于请求第二DU确认目标波束信息；第二DU向CU发送第二响应消息，该第二响应消息用于指示是否接受目标波束信息。
在第六方面的一种可能的设计中，第二请求消息中还包括以下一项或多项信息：目标波束信息对应的目标小区的小区标识、第二DU的标识信息或终端设备的传输状态信息，所述目标小区为第二DU的小区。
在第六方面的一种可能的设计中，若第二DU不接受目标波束信息，第二响应消息中包括第二DU更新后的目标波束信息和/或该更新后的目标波束信息对应的目标小区的小区标识。
在第六方面的一种可能的设计中，所述方法还包括：第二DU向CU发送第三配置消息，该第三配置消息中包括目标小区对应的一组配置信息。
在第六方面的一种可能的设计中，所述一组配置信息包括目标小区的以下一项或多项配置信息：参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC 配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
在第六方面的一种可能的设计中，所述方法还包括：第二DU接收来自终端设备的反馈信息，该反馈信息指示终端设备成功接收第一指示消息，该第一指示消息中包括目标波束信息和/或目标波束信息对应的目标小区的小区标识。
在第六方面的一种可能的设计中，所述方法还包括：第二DU根据目标小区对应的物理上行控制信道PUCCH资源配置信息，接收反馈信息。
第五方面和第六方面的一种可能的设计中的有益效果，可参考第一方面中的对应描述，不再赘述。
第七方面，本申请实施例提供一种移动性管理方法，该方法可由第一DU执行，也可以由配置于第一DU的部件(例如芯片或者电路)执行。可选的，第一DU可以是终端设备在执行移动性管理时的源DU。
所述方法包括：第一DU接收终端设备上报的第一测量结果，该第一测量结果包括K个小区对应的测量结果，所述K个小区包括所述终端设备当前的服务小区和至少一个非服务小区，K为正整数；第一DU向CU发送第一请求消息，该第一请求消息中包括至少一个候选波束信息，该至少一个候选波束信息根据第一测量结果确定，该第一请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理；第一DU接收来自CU的第一响应消息，该第一响应消息中包括目标波束信息。
在第七方面的一种可能的设计中，第一请求消息中还包括以下一项或多项信息：所述至少一个候选波束信息对应的候选小区的小区标识、第二DU的标识信息、终端设备的传输状态信息或所述至少一个候选波束信息对应的测量结果；第一响应消息中还包括目标波束信息对应的目标小区的小区标识，所述目标小区为第二DU的小区。
上述技术方案提供了一种接入网侧的移动性管理流程，其中第一DU可以根据终端设备上报的第一测量结果，确定至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区，并将该至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区通知给CU，由CU再将该至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区通知给第二DU。第二DU可根据该至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区，结合该第二DU自身小区的负载情况或者终端设备发送到第二DU的上行参考信号的信号质量，确定合适的目标波束信息和/或目标波束信息对应的目标小区。
该技术方案具体由第二DU确定终端设备进行移动性管理的目标波束信息和/或目标小区，可有效实现目标小区的负载均衡，并且使得接入网侧的第一DU、CU和第二DU可保持对终端设备进行移动性管理的目标波束信息和/或目标小区决策的一致性，支持终端设备进行快速的移动性管理，实现到目标小区的快速波束对齐。
在第七方面的一种可能的设计中，所述方法还包括：第一DU向终端设备发送第一指示消息，该第一指示消息中包括目标波束信息和/或该目标波束信息对应的目标小区的小区标识。
在第七方面的一种可能的设计中，所述方法还包括：第一DU接收来自CU的第一配置消息，该第一配置消息中包括所述至少一个非服务小区对应的一组配置信息；第一DU向终端设备发送第二配置消息，该第二配置消息中包括所述至少一个非服务小区对应的一 组配置信息。
在第七方面的一种可能的设计中，所述一组配置信息包括对应小区的以下一项或多项配置信息：参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
第八方面，本申请实施例提供一种移动性管理方法，该方法可由CU执行，也可以由配置于CU的部件(例如芯片或者电路)执行。
所述方法包括：CU接收来自第一DU的第一请求消息，该第一请求消息中包括至少一个候选波束信息，该第一请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理；CU向第二DU发送第二请求消息，该第二请求消息中包括所述至少一个候选波束信息，该第二请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息；CU接收来自第二DU的第二响应消息，该第二响应消息中包括目标波束信息；CU向所述第一DU发送第一响应消息，该第一响应消息中包括目标波束信息。
在第八方面的一种可能的设计中，第一请求消息中还包括以下一项或多项信息：所述至少一个候选波束信息分别对应的候选小区的小区标识、第二DU的标识信息、终端设备的传输状态信息或所述至少一个候选波束信息对应的测量结果；第二请求消息中还包括以下一项或多项信息：所述至少一个候选波束信息分别对应的候选小区的小区标识、第二DU的标识信息、终端设备的传输状态信息或所述至少一个候选波束信息对应的测量结果；第一响应消息还包括目标波束信息对应的目标小区的小区标识，所述目标小区为第二DU的小区；第二响应消息中还包括目标波束信息对应的目标小区的小区标识。
在第八方面的一种可能的设计中，所述方法还包括：CU接收来自第二DU的第三配置消息，该第三配置消息中包括目标小区对应的一组配置信息；CU向第一DU发送第一配置消息，稿第一配置消息中包括终端设备的至少一个非服务小区对应的一组配置信息。
在第八方面的一种可能的设计中，每组配置信息包括对应小区的以下一项或多项配置信息：参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
第九方面，本申请实施例提供一种移动性管理方法，该方法可由第二DU执行，也可以由配置于第二DU的部件(例如芯片或者电路)执行。可选的，第二DU可以是终端设备在执行移动性管理时的目标DU。
所述方法包括：第二DU接收来自CU的第二请求消息，该第二请求消息中包括至少一个候选波束信息，该第二请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理；第二DU向CU发送第二响应消 息，该第二响应消息中包括目标波束信息。
在第九方面的一种可能的设计中，第二请求消息中还包括以下一项或多项信息：所述至少一个候选波束信息分别对应的候选小区的小区标识、第二DU的标识信息、终端设备的传输状态信息或至少一个候选波束信息对应的测量结果；第二响应消息中还包括目标波束信息对应的目标小区的小区标识，该目标小区为第二DU的小区。
在第九方面的一种可能的设计中，所述方法还包括：第二DU向CU发送第三配置消息，该第三配置消息中包括目标小区对应的一组配置信息。
在第九方面的一种可能的设计中，一组配置信息包括目标小区的以下一项或多项配置信息：参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
在第九方面的一种可能的设计中，所述方法还包括：第二DU接收来自终端设备的反馈信息，该反馈信息指示终端设备成功接收第一指示消息，该第一指示消息中包括目标波束信息和/或目标波束信息对应的目标小区的小区标识。
在第九方面的一种可能的设计中，所述方法还包括：第二DU根据目标小区对应的物理上行控制信道PUCCH资源配置信息，接收反馈信息。
第八方面和第九方面的一种可能的设计中的有益效果，可参考第一方面中的对应描述，不再赘述。
第十方面，本申请实施例提供一种通信装置，该通信装置可以具有实现上述各方面中第一DU或CU或第二DU的功能，该通信装置可以为接入网设备，也可以为接入网设备中包括的芯片。
上述通信装置的功能可以通过硬件实现，也可以通过硬件执行相应的软件实现，所述硬件或软件包括一个或多个与上述功能相对应的模块或单元或手段(means)。
在一种可能的设计中，该通信装置的结构中包括处理模块和收发模块，其中，处理模块被配置为支持该通信装置执行上述各方面中第一DU或CU或第二DU相应的功能。收发模块用于支持该通信装置与其他通信设备之间的通信，例如当该通信装置为第一DU时，可向CU发送第一请求消息。该通信装置还可以包括存储模块，存储模块与处理模块耦合，其保存有通信装置必要的程序指令和数据。作为一种示例，处理模块可以为处理器，通信模块可以为收发器，存储模块可以为存储器，存储器可以和处理器集成在一起，也可以和处理器分离设置。
在另一种可能的设计中，该通信装置的结构中包括处理器，还可以包括存储器。处理器与存储器耦合，可用于执行存储器中存储的计算机程序指令，以使通信装置执行上述各方面中的方法。可选地，该通信装置还包括通信接口，处理器与通信接口耦合。当通信装置为网络设备时，该通信接口可以是收发器或输入/输出接口；当该通信装置为网络设备中包含的芯片时，该通信接口可以是芯片的输入/输出接口。可选地，收发器可以为收发电路，输入/输出接口可以是输入/输出电路。
第十一方面，本申请实施例提供一种芯片系统，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该 芯片系统实现上述各方面中的方法。
可选地，该芯片系统还包括接口电路，该接口电路用于交互代码指令至所述处理器。
可选地，该芯片系统中的处理器可以为一个或多个，该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上。
第十二方面，本申请实施例提供一种计算机可读存储介质，其上存储有计算机程序或指令，当该计算机程序或指令被执行时，使得通信装置执行上述各方面或各方面的任一种可能的设计中的方法。
第十三方面，本申请实施例提供一种计算机程序产品，当通信装置执行所述计算机程序产品时，使得通信装置执行上述各方面或各方面的任一种可能的设计中的方法。
第十四方面，本申请实施例提供一种通信系统，该通信系统包括第一DU、CU和第二DU。可选的，该通信系统还包括终端设备。可选的，该通信系统还可以包括核心网设备。
附图说明
图1为本申请实施例适用的一种通信系统的网络架构示意图；
图2为本申请实施例中接入网设备采用的CU-DU分离架构的示意图；
图3为本申请实施例提供的一种移动性管理方法的流程示意图；
图4为本申请实施例中CU向第一DU、终端设备提供所述至少一个其它小区的配置信息的示意图；
图5为本申请实施例提供的另一种移动性管理方法的流程示意图；
图6为本申请实施例提供的另一种移动性管理方法的流程示意图；
图7和图8为本申请实施例中终端设备与第二DU确认执行移动性管理的时机的两种可能的实施方式的示意图；
图9、图10和图11为本申请实施例提供的一种通信装置的结构示意图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。
本申请实施例的技术方案可以应用于各种通信系统，例如通用移动通信系统(universal mobile telecommunications system，UMTS)系统、码分多址(code division multiple access，CDMA)系统、无线局域网(WLAN,wireless local area network)、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、第五代(5th generation，5G)移动通信系统或新无线(new radio，NR)系统，或者应用于未来的通信系统或其它类似的通信系统等。
请参考图1，为本申请提供的一种通信系统的网络架构示意图，该通信系统中包括接入网设备和终端设备。其中，终端设备位于接入网设备提供的一个或多个小区(载波)的覆盖范围内，且为终端设备服务的小区可以有一个或多个。当为终端设备提供服务的小区 有多个时，终端设备可以按照载波聚合(carrier aggregation，CA)或双连接(dual connectivity，DC)或协作多点传输(coordinated multiple points transmission/reception，CoMP)的方式工作，至少一个小区可以为终端设备提供多于一种传输参数集对应的无线资源。例如，图1中所示，终端设备110同时位于接入网设备120的小区、接入网设备130的小区、接入网设备140的小区中，接入网设备120可以为宏基站(如macro eNB)，接入网设备130和接入网设备140可以为微基站(如small eNB)。应注意，图1只是示意图，该通信系统中还可以包括核心网设备、无线中继设备、无线回传设备等其他网络设备，在图1中未示出。
本申请实施例对该通信系统中包括的接入网设备、终端设备、核心网设备、以及其它网络设备的数量均不作限定。
本申请实施例中的接入网设备在不同类型或制式的通信系统可对应不同的设备，例如在5G系统中对应5G中的接入网设备(例如gNB或者ng-eNB)，在4G系统中对应4G中的接入网设备(例如eNB或者en-gNB)。
接入网设备与终端设备之间可以通过授权频谱进行通信，也可以通过非授权频谱进行通信，也可以同时通过授权频谱和非授权频谱进行通信。接入网设备与终端设备之间可以通过6千兆赫(gigahertz，GHz)以下的频谱进行通信，也可以通过6GHz以上的频谱进行通信，还可以同时使用6GHz以下的频谱和6GHz以上的频谱进行通信。本申请实施例对接入网设备和终端设备之间所使用的频谱资源不做限定。
本申请实施例中的接入网设备和终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和人造卫星上。本申请实施例对接入网设备和终端设备的应用场景不作限定。
需要说明的是，本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着通信网络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。
下面对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)本申请实施例中所涉及的终端设备，又可以称为终端、用户设备(user equipment，UE)、移动台、移动终端等，是一种向用户提供语音和/或数据连通性的设备，例如具有无线连接功能的手持式设备、车载设备等。终端设备通过无线方式与接入网设备相连，从而接入到通信系统中。目前一些终端设备的举例包括：手机、平板电脑、带无线收发功能的电脑、掌上电脑、移动互联网设备、可穿戴设备、虚拟现实终端设备、增强现实终端设备、工业控制中的无线终端、无人驾驶中的无线终端、远程手术中的无线终端、智能电网中的无线终端、运输安全中的无线终端、智慧城市中的无线终端、智慧家庭中的无线终端等等。本申请实施例对终端设备所采用的具体技术和具体设备形态不作限定。
作为示例而非限定，终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等， 以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
终端设备还可以是作为一个或多个部件或者单元而内置于车辆的车载模块、车载部件、车载芯片或者车载单元，车辆通过内置的所述车载模块、车载模组、车载部件、车载芯片或者车载单元可以实施本申请的方法。
2)本申请实施例中所涉及的接入网设备，又可以称为基站，是用于将终端设备接入到无线网络的无线接入网(radio access network，RAN)中的节点或设备。目前一些接入网设备的举例包括：基站(base station)、LTE系统或演进的LTE系统(LTE-Advanced，LTE-A)中的演进型基站(evolved NodeB，eNB)、5G通信系统中的下一代基站(next generation NodeB，gNB)、传输接收点(transmission reception point，TRP)、节点B(Node B，NB)、无线网络控制器(radio network controller，RNC)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(home(evolved)NodeB，HNB)、基带单元(base band unit，BBU)、无线保真(wireless fidelity，WiFi)接入点(access point，AP)、未来移动通信系统中的基站等。接入网设备也可以是完成基站部分功能的模块或单元，例如可以是集中式单元(central unit，CU)，或者分布式单元(distributed unit，DU)。本申请实施例对接入网设备所采用的具体技术和具体设备形态不作限定。
本申请实施例中的接入网设备可以采用CU-DU分离架构，所述CU-DU分离架构也可以称为分布式的部署架构。例如，如图2所示，接入网设备从逻辑上可以包括一个CU和一个或多个DU，每个DU可通过F1接口与CU连接，不同DU之间的信息交互可以基于CU的转发完成。CU与DU可以是物理上设置在一起，也可以物理上分离设置的，并不限定。其中，CU可以支持无线资源控制(radio resource control，RRC)、分组数据汇聚协议(packet data convergence protocol，PDCP)、业务数据适配协议(service data adaptation protocol，SDAP)的功能；DU可以支持无线链路控制(radio link control，RLC)层协议、媒体接入控制(medium access control，MAC)层协议和物理(physical，PHY)层协议的功能。
需要说明的是，本申请实施例中的术语“系统”和“网络”可被互换使用。“多个”是指两个或两个以上，鉴于此，本申请实施例中也可以将“多个”理解为“至少两个”。“至少一个”，可理解为一个或多个，例如理解为一个、两个或更多个。例如，包括至少一个，是指包括一个、两个或更多个，而且不限制包括的是哪几个。例如，包括A、B和C中的至少一个，那么包括的可以是A、B、C，A和B，A和C，B和C，或A和B和C。同理，对于“至少一种”等描述的理解，也是类似的。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，字符“/”，如无特殊说明，一般表示前后关联对象是一种“或”的关系。
除非有相反的说明，本申请实施例提及“第一”、“第二”等序数词用于对多个对象进行区分，不用于限定多个对象的顺序、时序、优先级或者重要程度，并且“第一”、“第二”的描述也并不限定对象一定不同。
下面对本申请实施例中所涉及的相关技术特征进行解释说明。
控制资源集合(control resource set，CORESET)：可以理解为一个时频资源集合，用于指 示物理下行控制信道(physical downlink control channel，PDCCH)传输的资源位置，包括PDCCH占用的时域符号数，频域的资源块数以及时隙的分配等。在时域上，1个CORESET可以被配置为1个或连续几个OFDM符号；在频域上，1个CORESET可以是一组连续或非连续的频域资源，包含不同聚合等级下的搜索空间。
搜索空间(search space，SS)：用于指示CORESET出现的周期和具体资源信息，例如起始的时隙以符号，以及重复出现的周期，从而终端设备可在指示的搜索空间的资源位置对PDCCH进行监听，一个搜索空间可以关联至少一个CORESET。
波束管理(beam management)：多天线进行波束赋型，能够通过改变每根天线的信号的相位和振幅，可以使波束指向特定的方向。对于NR系统，所有上下行信道的发送和接收都是基于波束的，因此需要进行波束管理，便于收发两端能够在最适合的波束上进行数据收发，提高信号强度，避免信号干扰，从而改善通信质量。
波束管理机制可包括如下过程：1)波束扫描：发送参考信号的波束，在预定义的时间间隔进行空间扫描；2)波束测量/判决：终端设备测量参考信号，选择最好的波束。3)波束报告：终端设备上报波束测量的结果；4)波束指示：接入网设备指示终端设备选择指定的波束。
用于波束管理的参考信号可包括：下行方向上的同步信号和物理广播信道块(synchronization signal and physical broadcast channel block，SSB)、信道状态信息参考信号(channel state information reference signal，CSI-RS)，以及上行方向上的PRACH和信道探测参考信号(sounding reference signal，SRS)，其中，SSB可适用于空闲态初始接入态或连接态，PRACH可适用于空闲态初始接入，CSI-RS和SRS可适用于连接态。
本申请的实施例中，物理下行共享信道(physical downlink shared channel，PDSCH)、物理下行控制信道(physical downlink control channel，PDCCH)、物理上行共享信道(physical uplink shared channel，PUSCH)和物理上行控制信道(physical uplink control channel，PUCCH)只是作为物理层的下行数据信道、下行控制信道、上行数据信道和上行控制信道的一种举例，在不同的系统和不同的场景中，数据信道和控制信道可能有不同的名称，本申请对此并不做限定。
在接入网设备采用CU-DU分离架构下，如果终端设备要从源DU的小区移动到与源DU属于同一CU的目标DU的小区，源DU与目标DU可以通过各自与CU之间的F1接口交互UE上下文修改请求与响应、UE上下文建立请求与响应、RRC重配置等信令。上述过程不仅信令开销较大，而且无法及时响应终端设备的快速移动，也无法对目标小区的波束进行有效管理，实现与目标小区的波束对齐。
针对上述问题，本申请提供一种移动性管理方法，该方法可应用在CU-DU分离架构下，终端设备在同一CU的不同DU的小区间移动的场景中。该场景也可以称为跨DU(inter-DU)的移动性管理场景。
位于网络侧的第一DU、CU和第二DU可通过本申请所提供的方法，协商确定终端设备的目标波束信息和/或目标小区，并指示给终端设备。如此，第一DU、CU、第二DU可保持对目标波束信息和/或目标小区决策的一致性，使得终端设备能够根据目标波束信息和/或目标小区进行移动性管理，实现与目标小区快速的波束对齐。
进一步地，针对目标波束信息和/或目标小区是由第一DU决定的，还是CU决定的， 还是第二DU决定的，本申请可包括三种可能的技术方案。为方便说明，将其分别称之为方案一、方案二和方案三。下面将分别对方案一、方案二和方案三进行详细说明。
需要说明的是，在本申请实施例中，第一DU和第二DU是属于同一个CU的不同DU。第一DU可以是终端设备的移动性管理过程中的源DU，即终端设备当前的服务小区所属的DU。第二DU可以是终端设备的移动性管理过程中的目标DU，即终端设备进行移动性管理的目标小区所属的DU。所述目标小区可以是终端设备将要切换到的小区，也可以是终端设备将要添加或激活为辅小区的小区，也可以是将要辅助终端设备进行数据传输的小区等，本申请均不限定。
方案一
请参考图3，为本申请实施例提供的一种移动性管理方法的流程示意图，该方法包括：
步骤S301、第一DU接收终端设备上报的第一测量结果，该第一测量结果包括K个小区对应的测量结果，K为正整数。
本申请实施例中，上述K个小区包括终端设备当前的服务小区和至少一个非服务小区。上述服务小区为第一DU的小区，上述至少一个非服务小区为与第一DU属于同一CU的至少一个其它DU的小区，其中，至少一个其它DU可包括第二DU(即下文中确定的目标DU)。可选的，上述至少一个非服务小区为上述服务小区的邻区。可选地，上述第一测量结果是终端设备对上述K个小区的下行参考信号进行测量得到的。
其中，终端设备当前的服务小区对应的测量结果可包括：该服务小区的至少一个下行参考信号的测量结果，或者该服务小区的下行参考信号的平均测量结果，或者该服务小区的下行参考信号中信号质量最好的前N个下行参考信号的平均测量结果，N为正整数。所述测量结果(或平均测量结果)可以是信道状态信息(channel status information，CSI)，例如接收信号接收功率(receive signal receiving power，RSRP)等用于表示参考信号接收质量的指标。
可选的，该服务小区对应的测量结果中还可包括下行参考信号关联的小区标识，即该服务小区的小区标识。所述小区标识可以是物理小区标识(physical cell identity，PCI)。
以上述至少一个非服务小区中的其中一个非服务小区为例，该非服务小区对应的测量结果可包括：该非服务小区的至少一个下行参考信号的测量结果，或者该非服务小区的下行参考信号的平均测量结果，或者该非服务小区的下行参考信号中信号质量最好的N个下行参考信号的平均测量结果。类似的，所述测量结果(或平均测量结果)可以是CSI，例如RSRP等用于表示参考信号接收质量的指标。
可选的，该非服务小区对应的测量结果中还可包括下行参考信号关联的小区标识，即该非服务小区的小区标识。所述小区标识可以是PCI。
需要说明的是，在第一测量结果中，不同的下行参考信号可对应不同的波束方向。根据一个下行参考信号的测量结果，可确定该下行参考信号对应的波束方向的信号强弱。另外，第一测量结果中的小区指示，可以通过在每个小区对应的测量结果中携带PCI等小区标识来显式指示，也可以通过参考信号标识来隐式指示，例如可以提前配置参考信号与小区之间的关联关系，如果参考信号标识位于a～b范围内，则属于小区0，如果参考信号标识位于c～d范围内，则属于小区1。
示例性地，终端设备向第一DU上报第一测量结果可以为：终端设备向第一DU发送 第一测量消息，该第一测量消息中包括上述第一测量结果。
可选的，该第一测量消息可以是物理层信令(例如PUCCH信令)，也可以是媒体接入控制控制单元(medium access control-control element，MAC CE)消息或者RRC层消息，本申请并不限定。
进一步地，该第一测量消息可以被配置专属的调度请求(scheduling request，SR)资源，用于当没有可用的上行授权资源时，触发SR过程，通过PUCCH发送SR知会第一DU调度上行授权资源，以发送第一测量消息。终端设备在发送完第一测量消息或者接收到来自第一DU的波束指示后可取消上述SR过程。
本申请实施例中，在终端设备向第一DU上报第一测量结果之前，如图4所示：
在步骤S401中，CU可向第一DU发送第一配置消息，该第一配置消息中包括上述至少一个非服务小区对应的一组配置信息。示例性的，如果至少一个非服务小区中包括服务小区的邻区1和邻区2，则该第一配置消息中可包括邻区1对应的一组配置信息和邻区2对应的一组配置信息。
可选的，该第一配置消息中还可包括所述服务小区对应的一组配置信息。示例性地，如果CU对第一DU的所述服务小区的相关配置进行了更新(例如重新配置了需要测量的所述服务小区的参考信号集合)，则CU也可以通过第一配置消息，向第一DU发送更新后的所述服务小区对应的一组配置信息。
每组配置信息中可包括对应小区的以下一项或多项配置信息：参考信号配置信息、测量配置信息、波束配置信息、准共址(quasi co-location，QCL)信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量(timing advance，TA)信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、MAC配置信息、RLC配置信息、PDCP配置信息或SDAP配置信息。应注意，不同小区对应的一组配置信息中包括的配置信息的种类和具体内容可以相同，也可以不同，本申请并不限定。例如某个小区对应的一组配置信息中可能包含上述列出的所有种类的配置信息，而另一个小区对应的一组配置信息中可能包含上述列出的部分种类的配置信息，可选的，对于不包含的那部分配置信息，终端设备可认为与当前服务小区保持一致。
其中，参考信号配置信息包括对应小区的至少一个参考信号的相关配置，所述至少一个参考信号可包括SSB、CSI-RS、SRS等。
可选的，参考信号配置信息还可包括用于指示所述至少一个参考信号与对应小区之间的关联关系的信息，以便于终端设备识别出某个参考信号具体是哪个小区的参考信号。示例性地，指示所述至少一个参考信号与对应小区之间的关联关系可具有以下两种方式：
方式1、显示小区指示。参考信号配置信息中包括所述至少一个参考信号关联的小区标识。终端设备可根据参考信号配置信息中的小区标识，判断参考信号关联的小区。
方式2、隐式小区指示。参考信号按照关联的小区进行分组，参考信号配置信息中包括所述至少一个参考信号的分组信息，该分组信息可以是参考信号所在的分组的标识，也可以是参考信号标识的取值范围。终端设备可根据参考信号配置信息中的参考信号的分组信息，判断参考信号关联的小区。
测量配置信息包括对应小区的至少一个参考信号的测量及上报的相关配置。对于下行参考信号(如SSB、CSI-RS等)，测量配置信息可包括与测量结果的上报相关的一些信息， 例如测量结果上报的周期、测量结果上报需要满足的条件、测量结果上报使用的资源、迟滞因子、结果过滤信息等。在一些可能的实施例中，测量结果上报使用的资源可以是对应小区的资源。
波束配置信息包括对应小区的下行波束指示信息和/或上行波束指示信息。下行波束指示信息可用于指示对应小区的至少一个下行波束方向，上行波束指示信息可用于指示对应小区的至少一个上行波束方向。示例性地，下行波束指示信息可包括对应小区的至少一个物理信道的传输配置指示(transmission configuration indication，TCI)状态信息，该TCI状态信息可包括TCI状态标识和TCI状态关联的QCL关系。上行波束指示信息可包括至少一个上行波束对应的参考信号标识，例如SRS标识、SSB标识、CSI-RS标识等。
可选的，波束配置信息还可包括用于指示所述下行波束指示信息/上行波束指示信息与对应小区之间的关联关系的信息，以便于终端设备识别出某个下行波束指示信息/上行波束指示信息具体是哪个小区的波束指示信息。示例性地，波束配置信息中可包括下行波束指示信息/或上行波束指示信息关联的小区的小区标识。以下行波束指示信息为例，TCI状态信息可以表示为：TCI状态标识，QCL关系{参考信号，小区标识}，用于指示一个TCI状态与某个小区的某个参考信号之间具有QCL关系。终端设备可根据波束配置信息中的小区标识，判断TCI状态信息关联的小区。
QCL信息包括对应小区的至少一个物理信道与至少一个参考信号之间的QCL关系，所述QCL关系可通过TCI状态来指示。所述至少一个物理信道可包括PDCCH、PDSCH、PUCCH、PUSCH等，所述至少一个参考信号可包括SSB、CSI-RS、SRS等。
控制资源集合CORESET配置信息包括对应小区的CORESET的相关配置，例如CORESET标识。
搜索空间SS配置信息包括对应小区的搜索空间的相关配置，例如关联的至少一个CORESET标识、起始时隙以及符号、周期等。
TA配置信息包括对应小区的TA信息，该TA信息可以用于指示对应小区的TA是否为0，或者也可以为终端设备在该对应小区的TA值，可选的，该TA值可以是由接入网设备根据终端设备发送的上行参考信号估测的。
终端设备标识信息包括对应小区为终端设备分配的终端设备标识信息，用于在该对应小区标识该终端设备。例如，终端设备标识信息可以是小区无线网络临时标识(cell radio network temporary identifier，C-RNTI)，或临时小区无线网络临时标识(Temporary C-RNTI，TC-RNTI)等。
用于PDCCH加扰/解扰的序列信息可以不同于C-RNTI等终端设备身份标识信息。
随机接入资源配置信息包括对应小区的随机接入前导码(preamble)、随机接入可用时隙等用于随机接入过程的资源，其中，随机接入可用时隙用于传输随机接入前导码。
PUCCH资源配置信息包括对应小区的PUCCH资源的相关配置，该PUCCH资源可以用来传输混合自动重传请求(hybrid automatic repeat request acknowledgment，HARQ)反馈、调度请求、CSI测量结果等。
无线链路监控配置信息包括对应小区的无线链路监控配置，用于监测对应小区的无线链路质量，检测对应小区的通信链路是否出现故障，例如是否发生了无线链路失败等。
安全相关配置信息包括对应小区的数据加密和/或完整性保护等配置，例如包含所需的秘钥、算法、或者更新秘钥所需的参数等，用于实现对应小区通信的数据的加密和/或完整 性保护功能，从而保障通信的安全性。
所述第一配置消息可以是UE上下文建立请求(UE Context Setup Request)消息，也可以是UE上下文修改(UE Context Modification)消息，或者RRC消息传输(RRC Message Transfer)消息等适用于CU与DU之间的接口消息，本申请并不限定。
可以看出，通过第一配置消息，CU可将至少一个非服务小区和服务小区的配置信息通知给第一DU，以便第一DU可以将该至少一个非服务小区和服务小区的配置信息通知给终端设备。
可选的，第一DU接收到来自CU的第一配置消息后，还可向CU发送第一配置消息对应的响应消息，用于确认或协商第一配置消息中的配置信息。其中，确认第一配置消息中的配置信息可以是指：第一DU针对接收到的第一配置消息向CU发送肯定应答(ACKnowledgement，ACK)或否定应答(negative ACKnowledgement，NACK)反馈。协商第一配置消息中的配置信息可以是指：第一DU通过响应消息告知CU可能缺少某些配置信息，希望下次CU在发第一配置消息时，可以包含这些配置信息。
进而，在步骤S402中，第一DU可向终端设备发送第二配置消息，该第二配置消息中包括所述至少一个非服务小区对应的一组配置信息。可选的，该第二配置信息中还可包括所述服务小区对应的一组配置信息。
所述第二配置消息可以是RRC消息、MAC消息等任意空口信令。例如，RRC配置消息、RRC建立消息、RRC恢复消息或MAC CE消息等消息。
可以看出，通过第二配置信息，第一DU可将至少一个非服务小区的参考信号配置、测量配置、波束配置等配置信息通知给终端设备。可选地，还可以将至少一个非服务小区为该终端设备分配的终端设备标识信息(例如C-RNTI)和/或随机接入资源等通知给终端设备。
可选的，第一DU向终端设备发送第二配置消息后，终端设备还可以向第一DU发送第二配置消息对应的响应消息，用于确认或者协商第二配置消息中的配置信息。
在步骤S403中，终端设备可测量所述服务小区和所述至少一个非服务小区的下行参考信号，得到第一测量结果，并通过步骤S404上报给第一DU。
示例性地，终端设备可根据所述服务小区的参考信号配置信息，测量所述服务小区的下行参考信号，得到所述服务小区对应的测量结果。类似的，终端设备也可根据所述至少一个非服务小区的参考信号配置信息，分别测量所述至少一个非服务小区中每个非服务小区的下行参考信号，得到所述至少一个非服务小区对应的测量结果。
可选的，本申请实施例中，同一CU下的各个DU均可向CU发送该DU的至少一个小区的配置信息。例如，如图4中步骤S400所示，第二DU可以向CU发送第三配置消息，该第三配置消息中包括第二DU的至少一个小区对应的一组配置信息。所述第二DU为上文中提到的与第一DU属于同一个CU的所述至少一个其它DU之一，也是下文中确定的目标DU。所述至少一个小区中包括下文中确定的目标小区，即第三配置消息中包括第二DU的目标小区对应的一组配置信息。
类似的，第一DU也可以向CU发送第四配置消息，该第四配置消息包括第一DU下的至少一个小区对应的一组配置信息，该第一DU下的至少一个小区可以包括终端设备当前的服务小区。如此，CU可接收来自该CU下的各个DU的配置消息，根据各个DU的配置消息，汇总得到所述至少一个非服务小区的配置信息，然后将所述至少一个非服务小区 的配置信息，携带在第一配置消息中发送给第一DU。
需要说明的是，第三配置消息可以是第二DU主动发送给CU的，也可以是CU向第二DU请求后，DU响应于CU的请求而发送的。第四配置消息以及其他DU发送给CU的配置消息与此类似。
步骤S302、第一DU向CU发送第一请求消息，该第一请求消息中包括目标波束信息，该目标波束信息根据第一测量结果确定，该目标波束信息用于终端设备执行移动性管理，该第一请求消息用于请求确认目标波束信息。
相应的，CU接收来自第一DU的第一请求消息。
步骤S303、CU向第二DU发送第二请求消息，该第二请求消息中包括目标波束信息，该第二请求消息用于请求确认目标波束信息。
相应的，第二DU接收来自CU的第二请求消息。
本申请实施例中，第一DU接收到来自终端设备的第一测量结果后，可根据该第一测量结果，确定终端设备执行移动性管理的目标波束信息和/或该目标波束信息对应的目标小区。所述目标波束信息可包括上行目标波束信息，也可包括下行目标波束信息，或者包括上行目标波束信息和下行目标波束信息，并不限定。可选的，如果终端设备上报的第一测量结果中包括多个DU的小区对应的测量结果，或者说终端设备测量的所述K个小区属于多个DU，则第一DU还可根据多个DU的小区对应的测量结果，确定目标DU，例如从所述多个DU中确定第二DU为目标DU，该目标DU可以是信号质量最好的波束关联的DU，或者是信号质量最好的小区关联的DU。
示例性地，第一DU可通过比较第一测量结果中各个小区对应的测量结果，然后选择其中信号质量最优的小区和对应的波束，从而确定目标波束信息和/或目标小区。
进而，第一DU可向CU发送第一请求消息，通过该第一请求消息，将确定的目标波束信息和/或目标小区通知给CU。CU接收到第一请求消息之后，可向第二DU发送第二请求消息，通过该第二请求消息，将目标波束信息和/或目标小区通知给第二DU，并请求第二DU确认目标波束信息和/或目标小区。
所述第一请求消息中可包括以下一项或多项信息：目标波束信息、目标波束信息对应的目标小区的小区标识、第二DU的标识信息或终端设备的传输状态信息。
所述第二请求消息中可包括以下一项或多项信息：目标波束信息、目标波束信息对应的目标小区的小区标识、第二DU的标识信息或终端设备的传输状态信息。
其中，目标小区的小区标识可以是目标小区的PCI。第二DU的标识信息用于指示第二DU为目标DU，或者说目标小区为该第二DU下的小区。
终端设备的传输状态信息可包括PHY层状态信息、RLC层状态信息或MAC层状态信息中的一项或多项。所述PHY层状态信息可包括终端设备正在使用的HARQ进程的状态信息，该状态信息例如可以是新数据指示(new data indication，NDI)，也可以是用于指示HARQ进程当前处于新数据包待传或旧数据包重传的其他参数。所述RLC层状态信息可包括RLC重传计数器的数值、RLC层适用的数据传输或接收的窗口状态，例如窗口的最低起始位置。RLC重传计数器的数值用于指示RRC实体当前的重传次数，RLC层适用的数据传输或接收的窗口状态用于指示RLC层的运行状态。MAC层状态信息可包括缓存状态报告(buffer status report，BSR)的触发状态、MAC层的相关过程用到的计数器的数值或窗口状态等。BSR的触发状态用于指示BSR是否已经触发并处于挂起状态，MAC层的 相关过程用到的计数器的数值或窗口状态用于指示MAC层当前的运行状态。
可以看出，第一DU与第二DU交互上述传输状态信息，可以使得终端设备执行移动性管理后第二DU侧终端设备对应的传输状态，与终端设备执行移动性管理之前第一DU侧终端设备对应的传输状态保持一致，从而避免对协议层进行重置，有效节省信令开销，提高移动性管理的效率。
步骤S304、第二DU向CU发送第二响应消息，该第二响应消息用于指示是否接受目标波束信息。
相应的，CU接收来自第二DU的第二响应消息。
步骤S305、CU向第一DU发送第一响应消息，该第一响应消息用于指示目标波束信息是否被接受。
相应的，第一DU接收来自CU的第一响应消息。
本申请实施例中，第二DU接收到来自CU的第二请求消息之后，可获取其中的目标波束信息和/或目标小区，判断该目标波束信息和/或目标小区是否可用，进而决定是否接受该目标波束信息和/或目标小区，并通过第一响应消息、第二响应消息分别指示给CU和第一DU。可选的，第一响应消息和第二响应消息中可包括第二DU的标识信息，用于指示第二DU为目标DU。
若目标波束信息和/或目标小区可用，则第二DU可接受该目标波束信息和/或目标小区，并通过第二响应消息将第二DU决定接受目标波束信息和/或目标小区的结果通知给CU，以便CU再通过第一响应消息将第二DU决定接受所述目标波束信息和/或目标小区的结果通知给第一DU。
若目标波束信息和/或目标小区不可用，则第二DU可不接受该目标波束信息和/或目标小区，并通过第二响应消息将第二DU决定不接受所述目标波束信息和/或目标小区的结果通知给CU，以便CU再通过第一响应消息将第二DU决定不接受所述目标波束信息和/或目标小区的结果通知给第一DU。
可选的，若目标波束信息和/或目标小区不可用，第二DU还可重新确定目标波束信息和/或目标小区，并通过第二响应消息将更新后的目标波束信息和/或目标小区告知CU，由CU再通过第一响应消息将该更新后的目标波束信息和/或目标小区告知第一DU。
示例性地，第二DU可根据目标波束信息和/或目标小区的用户负载情况，判断目标波束信息和/或目标小区是否可用。例如，如果第一DU确定的目标波束信息和/或目标小区的用户负载较高，则第二DU可判断该目标波束信息和/或目标小区不可用，并指示不接受该目标波束信息和/或目标小区。可选的，第二DU可重新确定目标波束信息和/或目标小区，从而更新目标波束信息和/或目标小区。例如，第二DU可以确定一个与之前的目标波束信息指示的波束方向接近的波束方向，或者之前的目标波束信息指示的波束方向是个窄波束，第二DU更新后的目标波束信息可指示一个类似方向的宽波束等。
在第一DU接收到来自CU的第一响应消息之后，如图3中的可选步骤S306所示，第一DU还可向终端设备发送第一指示消息，该第一指示消息中可包括目标波束信息和/或该目标波束信息对应的目标小区的小区标识。可选的，该第一指示消息中还可包括服务小区的波束信息和/或服务小区的小区标识。
可以理解地，如果第二DU接受第一DU确定的目标波束信息和/或目标小区，则第一指示消息中包括的目标波束信息和/或目标小区是指第一DU根据第一测量结果确定的目标 波束信息和/或目标小区。若第二DU不接受第一DU确定的目标波束信息和/或目标小区，则第一响应消息和第二响应消息中可包括第二DU更新后的目标波束信息和/或目标小区，相应的，第一指示消息中包括的目标波束信息和/或目标小区是指该第二DU更新后的目标波束信息和/或目标小区。
终端设备接收到来自第一DU的第一指示信息之后，可根据该第一指示信息指示的内容执行移动性管理。所述执行移动性管理可以是执行以下任一种操作：
1)切换到目标小区；
2)确定目标小区为辅小区；
3)驻留服务小区且通过目标小区进行数据传输；
4)驻留服务小区且使用目标小区的波束方向，通过服务小区进行数据传输。
可选的，第一指示消息中包括终端操作指示信息，例如通过两比特信息，指示上述四种操作中的一项操作，示例性的，00代表操作(1)，01代表操作(2)，10代表操作(3)，11代表操作(4)。
可选的，第一指示消息中的终端操作指示信息，可由第一DU根据第一测量结果的内容进行选择。示例性的，若当前服务小区波束的RSRP测量值低于设定的门限值，则终端操作指示信息可指示终端设备切换到目标小区，若当前服务小区波束的RSRP测量值不低于设定的门限值，则终端操作指示信息可指示终端设备仍驻留原服务小区且通过目标小区进行数据传输。可以理解地，在下文所述的方案二中，第一指示消息中的终端操作指示信息，可以由CU根据至少一个候选波束信息或候选小区对应的测量结果的内容进行选择。而在下文所述的方案三中，第一指示消息中的终端操作指示信息，可以由第二DU根据至少一个候选波束信息或候选小区对应的测量结果的内容进行选择。下文对此将不再赘述。
其中，确定目标小区为辅小区可以是指：添加或激活目标小区作为终端设备的服务小区，或者说将目标小区添加到终端设备的服务小区集合中。此时，原先的服务小区为该服务小区集合中的主小区，目标小区为该服务小区集合中的辅小区。例如，可以通过服务小区和目标小区组成载波聚合CA，共同为终端设备提供服务。
驻留服务小区且通过目标小区进行数据传输可以是指：不通过CA的方式将目标小区添加或激活为服务小区，而是通过目标小区的至少一个传输接收点(transmission reception point，TRP)为终端设备进行数据传输。可选的，从终端设备的角度看，服务小区仍为原先的服务小区，仅借助目标小区的TRP额外提供数据传输能力。例如，当终端设备位于小区1的边缘，信号质量较差，小区2的信号质量较好时，终端设备可以不切换到小区2，也不将小区2添加或激活为服务小区，而是仅通过小区2的较优波束与小区2进行数据通信。
驻留服务小区且使用目标小区的波束方向，通过服务小区进行数据传输可以是指：不通过CA的方式将目标小区添加或激活为服务小区，也不通过目标小区的至少一个TRP为终端设备进行数据传输，而是仅根据目标小区的TRP的波束方向，仍通过原先的服务小区进行数据传输，从而为终端设备提供更多波束方向的选择。可选地，从终端设备的角度看，服务小区仍为原来的服务小区，仅借助目标小区的TRP额外提供参考波束方向。例如，当终端设备通过测量小区1的下行参考信号和小区2的下行参考信号，确定小区2的波束方向信号质量较好时，终端设备可以不切换到小区2，也不将小区2添加或激活为服务小区，而是仅通过小区2的较优波束方向与小区1进行数据通信。
进一步地，终端设备可建立与目标小区之间的通信连接，并通过目标波束信息指示的波束方向与目标小区进行通信。示例性地，在一些可能的方案中，如果终端设备从服务小区切换到目标小区，终端设备可断开与服务小区之间的通信连接，建立与目标小区之间的通信连接，进而通过目标小区与第二DU进行通信。在另一些可能的方案中，如果终端设备从服务小区切换到目标小区，终端设备可以暂时挂起(suspend)与服务小区之间的通信连接，无须断开与服务小区之间的通信连接，例如可以保存服务小区的TCI状态，无须释放服务小区的TCI状态等配置信息，如此当终端设备再次切换回服务小区时，可以恢复与服务小区之间的通信连接，无须重新建立与服务小区之间的通信连接，例如无须重新配置服务小区的TCI状态等配置信息，而是直接恢复使用服务小区的TCI状态等配置信息，从而实现快速切换，提高切换效率。在另一些可能的方案中，如果终端设备确定将目标小区添加或激活为辅小区，第一DU可以通过服务小区的PDCCH调度目标小区的PUSCH、PDSCH等资源，从而使得终端设备能够与目标小区通信，在这种情况下，终端设备可以保持PDCCH的TCI状态，并使用目标小区的PDSCH、PUSCH的TCI状态对齐接收波束。
可选的，终端设备可以触发到目标小区的随机接入，也可以不触发到目标小区的随机接入，直接根据目标小区的配置信息与目标小区通信。
可选的，如果第一指示信息中包括目标波束信息和服务小区的波束信息，则终端设备可根据预先配置好的规则或者自主选择，确定是驻留服务小区且通过服务小区进行数据传输，还是切换到目标小区，或者将目标小区添加或激活为辅小区，或者驻留服务小区且通过目标小区进行数据传输，或者驻留服务小区且使用目标小区的波束方向，通过服务小区进行数据传输。示例性地，终端设备可以根据测量到的服务小区的下行参考信号的信号质量和目标小区的下行参考信号的信号质量进行决策。如果第一测量结果中目标小区的下行参考信号的信号质量高于服务小区的下行参考信号的信号质量，则终端设备可以选择切换到目标小区，或者将目标小区添加或激活为辅小区，或者在目标小区的辅助下进行数据传输；反之，终端设备可驻留在服务小区，继续通过服务小区进行数据传输。应注意，本申请中所提及的参考信号的信号质量可以是小区级别的信号质量，也可以是参考信号级别的信号质量，并不限定。
可选的，终端设备还可以对服务小区和目标小区进行功能或者角色的互换。示例性地，一种可能的方案中，服务小区为终端设备的主小区，目标小区为终端设备的辅小区，终端设备接收到第一指示消息之后，可以根据其中的目标波束信息，将服务小区从主小区变为辅小区，将目标小区从辅小区变为主小区。例如，服务小区的至少一种功能和相关的配置失效，包括但不限于随机接入，无线链路检测，PUCCH资源等；目标小区的至少一种功能和相关的配置开始生效，包括但不限于随机接入，无线链路检测，PUCCH资源等。所述生效时间可以是接收到第一指示消息后的时刻，也可以是接收到第一指示消息后的时刻加上偏移值，该偏移值可以是协议约定或者接入网设备(如第一DU或CU)提前配置。例如目标小区的至少一种功能和相关的配置可以在终端设备接收到所述至少一个波束信息并向第一DU反馈接收成功的响应后生效。
可选的，第一响应消息和第二响应消息中还可包括目标小区为终端设备分配的终端设备标识信息(例如C-RNTI)和/或随机接入资源配置信息，如此，第一指示消息中也可包括目标小区为终端设备分配的终端设备标识信息和/或随机接入资源配置信息，以便第一DU可以将上述终端设备标识信息和/或随机接入资源配置信息转发给终端设备。
示例性地，在第一响应消息或第二响应消息或第一指示消息中携带目标小区为终端设备分配的终端设备标识信息和/或随机接入资源配置信息可能的应用场景包括：1)第一DU之前未向终端设备提供目标小区为终端设备分配的终端设备标识信息和/或随机接入资源配置信息，例如第一DU向终端设备发送的第二配置信息中包括目标小区对应的一组配置信息，但是该目标小区对应的一组配置信息中未包括目标小区为该终端设备分配的终端设备标识信息和/或随机接入资源配置。2)第一DU之前向终端设备提供了目标小区为终端设备分配的终端设备标识信息和/或随机接入资源配置信息，但是预留的终端设备标识信息已不可用，或者预分配的随机接入资源对应的波束方向与目标小区的目标波束方向相差过大。
所述第一指示消息可以是物理层信令(例如PDCCH信令)，也可以是MAC CE消息或者RRC层消息，本申请并不限定。所述RRC消息例如可以是RRC配置消息、RRC建立消息、RRC恢复消息等。
在终端设备切换到目标小区之后，在一些可能的方案中，终端设备可执行PDCP数据恢复过程，用于指示PDCP层没有收到RLC层成功确认的数据包重新进行传输，通过与目标小区关联的RLC实体进行发送，从而保证PDCP数据连续性不受中断影响。例如终端设备与第一DU有部分PDCP数据未成功发送，因此当终端设备从第二DU的目标小区进行数据通信时，需要保证这部分PDCP数据不丢失，因此需要触发所述PDCP数据恢复过程。
在另一些可能的方案中，终端设备不需要执行PDCP数据恢复过程，还可以不执行RLC重置，MAC重置等过程，由于第一DU将传输状态信息发送给了第二DU，因此当终端设备与第二DU的目标小区进行数据通信时，终端设备还可以使用第一DU的服务小区的传输状态，继续与目标小区进行通信。
根据上述内容可知，本申请实施例的方案一提供了一种接入网侧的移动性管理流程，其中第一DU可以根据终端设备上报的第一测量结果，确定终端设备执行移动性管理的目标波束信息和/或该目标波束信息对应的目标小区，并将该目标波束信息和/或目标小区通知给CU，通过CU请求第二DU确认上述目标波束信息和/或目标小区是否可用。该方案一中由第一DU决定终端设备进行移动性管理的目标波束信息和/或目标小区，可有效减少CU与DU之间的信令开销，并且使得接入网侧的第一DU、CU和第二DU可保持对终端设备进行移动性管理的目标波束信息和/或目标小区决策的一致性，支持终端设备进行快速的移动性管理，实现到目标小区的快速波束对齐。
方案二
请参考图5，为本申请实施例提供的一种移动性管理方法的流程示意图，该方法包括：
步骤S501、第一DU接收终端设备上报的第一测量结果，该第一测量结果包括K个小区对应的测量结果，K为正整数。
所述步骤S501的具体实施方式可参考上文中步骤S301的相关描述，此处不再赘述。
步骤S502、第一DU向CU发送第一请求消息，该第一请求消息中包括至少一个候选波束信息，该至少一个候选波束信息根据第一测量结果确定，该第一请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理。
相应的，CU接收来自第一DU的第一请求消息。
本申请实施例中，第一DU接收到来自终端设备的第一测量结果之后，可根据第一测量结果中所述K个小区对应的测量结果，确定所述至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区。例如，第一DU可根据所述K个小区对应的测量结果，确定出信号质量较好的M个候选波束，以及这M个候选波束对应的L个候选小区，M和L均为正整数。
进而，第一DU可向CU发送第一请求消息，以请求根据该第一请求消息中的至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区，确定目标波束信息和/或目标小区。
需要说明的是，第一请求消息可以明确指示请求CU或第二DU来确定目标波束信息和/或目标小区，也可以不明确指示请求CU或第二DU确定目标波束信息和/或目标小区，而是由CU自行判断是由该CU来确定目标波束信息和/或目标小区，还是由第二DU确定目标波束信息和/或目标小区。可以理解地，由CU确定目标波束信息和/或目标小区对应该方案二，由第二DU确定目标波束信息和/或目标小区对应下文介绍的方案三。
所述第一请求消息中可包括以下一项或多项信息：所述至少一个候选波束信息、所述至少一个候选波束信息对应的候选小区的小区标识、第二DU的标识信息、终端设备的传输状态信息或所述至少一个候选波束信息对应的测量结果。其中，所述至少一个候选波束信息对应的测量结果是指终端设备通过测量该至少一个波束信息对应的下行参考信号得到的测量结果，该测量结果可以是CSI，例如RSRP等用于表示参考信号接收质量的指标。可以理解地，所述至少一个候选波束信息对应的测量结果息包含在第一测量结果中。
步骤S503、CU根据至少一个候选波束信息，确定目标波束信息。
步骤S504、CU向第二DU发送第二请求消息，该第二请求消息中包括目标波束信息，该第二请求消息用于请求第二DU确认所述目标波束信息。
相应的，第二DU接收来自CU的第二请求消息。
所述第二请求消息中包括以下一项或多项信息：目标波束信息、目标波束信息对应的目标小区的小区标识、第二DU的标识信息或终端设备的传输状态信息。
本申请实施例中，CU接收到来自第一DU的第一请求消息之后，可根据至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区，确定目标波束信息和/或目标小区，进而向第二DU发送第二请求消息。
示例性地，CU可基于无线资源管理(radio resource management，RRM)算法或波束管理算法，例如考虑不同波束的负载情况，从至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区中，确定目标波束信息和/或目标小区。例如，第一请求消息中包括小区1的波束2和小区2的波束5，如果CU判断小区1的波束2方向上用户数量较多，负载较大，则CU可确定优先切换到小区2的波束5。如果第一请求消息中包括该至少一个候选波束信息对应的测量结果，则CU在确定目标波束信息和/或目标波束信息对应的目标小区时，还可以根据该至少一个候选波束信息对应的测量结果做进一步判断。
可选的，如果该至少一个候选波束信息对应的候选DU有多个，CU还可以根据该至少一个候选波束信息对应的测量结果，确定目标DU，例如确定第二DU为目标DU。
步骤S505、第二DU向CU发送第二响应消息，该第二响应消息用于指示是否接受所述目标波束信息。
相应的，CU接收来自第二DU的第二响应消息。
步骤S506、CU向第一DU发送第一响应消息，该第一响应消息中包括目标波束信息。
相应的，第一DU接收来自CU的第一响应消息。
本申请实施例中，第二DU接收到来自CU的第二请求消息之后，第二DU可判断该目标波束信息和/或该目标波束信息对应的目标小区是否可用，进而决定是否接受该目标波束信息和/或该目标波束信息对应的目标小区，并向CU发送第二响应消息。具体过程可参考上文中步骤S304和S305中的相关描述，不再赘述。
如果第二DU接受CU确定的目标波束信息和/或该目标波束信息对应的目标小区，则第二响应消息可用于指示接受目标波束信息和/或目标小区，相应的，第一响应消息中可包括目标波束信息和/或该目标波束信息对应的目标小区的小区标识。
如果第二DU不接受CU确定的目标波束信息和/或该目标波束信息对应的目标小区，则第二响应消息可用于指示不接受目标波束信息和/或目标小区。可选的，第二DU还可进一步更新目标波束信息，和/或确定更新后的目标波束信息对应的目标小区。如此，第二响应消息中还可包括该更新后的目标波束信息和/或该更新后的目标波束信息对应的目标小区的小区标识，第一响应消息中也可包括该更新后的目标波束信息和/或该更新后的目标波束信息对应的目标小区的小区标识。
可以理解地，第一DU接收到来自CU的第一响应消息之后，如可选步骤S507所示，第一DU还可向终端设备发送第一指示消息，以使终端设备根据该第一指示消息执行移动性管理。具体过程请参考上文中的相关描述，不再赘述。
根据上述内容可知，在本申请实施例的方案二提供了一种接入网侧的移动性管理流程，其中第一DU可以根据终端设备上报的第一测量结果，确定至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区，并将该至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区通知给CU，以便CU根据该至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区确定目标波束信息和/或目标小区，并请求第二DU确认上述目标波束信息和/或目标小区是否可用。该方案二中由CU来决定终端设备进行移动性管理的目标波束信息和/或目标小区，可使得CU能够对属于该CU的各个DU的小区进行统一的管理和调度，并且使得接入网侧的第一DU、CU和第二DU可保持对终端设备进行移动性管理的目标波束信息和/或目标小区决策的一致性，支持终端设备进行快速的移动性管理，实现到目标小区的快速波束对齐。
方案三
请参考图6，为本申请实施例提供的一种移动性管理方法的流程示意图，该方法包括：
步骤S601、第一DU接收终端设备上报的第一测量结果，该第一测量结果包括K个小区对应的测量结果，K为正整数。
所述步骤S601的具体实施方式可参考上文中步骤S301的相关描述，此处不再赘述。
步骤S602、第一DU向CU发送第一请求消息，该第一请求消息中包括至少一个候选波束信息，该至少一个候选波束信息根据第一测量结果确定，该第一请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理。
相应的，CU接收来自第一DU的第一请求消息。
所述第一请求消息中可包括以下一项或多项信息：所述至少一个候选波束信息、所述 至少一个候选波束信息对应的候选小区的小区标识、第二DU的标识信息、终端设备的传输状态信息或所述至少一个候选波束信息对应的测量结果。
所述步骤S602的具体实施方式可参考上文中步骤S503的相关描述，此处不再赘述。
步骤S603、CU向第二DU发送第二请求消息，该第二请求消息中包括所述至少一个候选波束信息，该第二请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息。
相应的，第二DU接收来自CU的第二请求消息。
所述第二请求消息中可包括以下一项或多项信息：所述至少一个候选波束信息、所述至少一个候选波束信息对应的候选小区的小区标识、第二DU的标识信息、终端设备的传输状态信息或所述至少一个候选波束信息对应的测量结果。
本申请实施例中，CU接收到来自第一DU的第一请求消息之后，可判断由第二DU确定终端设备进行移动性管理的目标波束信息和/或目标小区，进而将第一请求消息中携带的信息，通过第二请求消息通知给第二DU。
可选的，如果该至少一个候选波束信息对应的候选DU有多个，CU还可以根据该至少一个候选波束信息对应的测量结果，确定目标DU，例如确定第二DU为目标DU，进而向该第二DU发送第二请求消息。
步骤S604、第二DU根据所述至少一个候选波束信息，确定目标波束信息和/或目标小区。
本申请实施例中，第二DU接收到来自CU的第二请求消息之后，可根据所述至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区，确定目标波束信息和/或目标波束信息对应的目标小区。
示例性地，第二DU可基于RRM算法或波束管理算法，例如考虑不同波束的负载情况，或者结合终端设备发送到该第二DU的上行参考信号的信号质量，从所述至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区中，确定目标波束信息和/或目标波束信息对应的目标小区。例如，第一请求消息中包括小区1的波束2和小区2的波束5，如果CU判断小区1的波束2方向上用户数量较多，负载较大，则CU可确定优先切换到小区2的波束5。如果第二请求消息中包括该至少一个候选波束信息对应的测量结果，则第二DU在确定目标波束信息和/或目标波束信息对应的目标小区时，还可以根据该至少一个候选波束信息对应的测量结果做进一步判断。
步骤S605、第二DU向CU发送第二响应消息，该第二响应消息中包括目标波束信息。
相应的，CU接收来自第二DU的第二响应消息。
本申请实施例中，第二DU可通过第二响应消息，将第二DU确定的目标波束信息和/或该目标波束信息对应的目标小区通知给CU。即第二响应消息中可包括第二DU确定的目标波束信息和/或该目标波束信息对应的目标小区的小区标识。
步骤S606、CU向第一DU发送第一响应消息，该第一响应消息中包括目标波束信息。
相应的，第一DU接收来自CU的第一响应消息。
本申请实施例中，CU可通过第一响应消息，将第二DU确定的目标波束信息和/或该目标波束信息对应的目标小区通知给第一DU。即，第一响应消息中可包括第二DU确定的目标波束信息和/或该目标波束信息对应的目标小区的小区标识。
可以理解地，第一DU接收到来自CU的第一响应消息之后，如可选步骤S607所示， 第一DU还可向终端设备发送第一指示消息，以使终端设备根据该第一指示消息执行移动性管理。具体过程请参考上文中的相关描述，不再赘述。
根据上述内容可知，在本申请实施例的方案三提供了一种接入网侧的移动性管理流程，其中，第一DU可以根据终端设备上报的第一测量结果，确定至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区，并将该至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区通知给CU，由CU再将该至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区通知给第二DU。第二DU可根据该至少一个候选波束信息和/或该至少一个候选波束信息对应的候选小区，结合该第二DU自身小区的负载情况或者终端设备发送到第二DU的上行参考信号的信号质量，确定合适的目标波束信息和/或目标波束信息对应的目标小区，从而可有助于实现目标小区的负载均衡，并且使得接入网侧的第一DU、CU和第二DU可保持对终端设备进行移动性管理的目标波束信息和/或目标小区决策的一致性，支持终端设备进行快速的移动性管理，实现到目标小区的快速波束对齐。
本申请实施例还提供另一种移动性管理方法，该方法用于终端设备与第二DU的目标小区确认执行移动性管理的时机，使得终端设备与第二DU对于执行移动性管理的时机的理解保持一致，避免由于第二DU不清楚终端设备执行移动性管理的时机而造成不必要的数据中断。
请参考图7，该移动性管理方法的一种可能的实施方式包括如下流程：
步骤S701、第一DU向终端设备发送第一指示消息，该第一指示消息中包括目标波束信息和/或该目标波束信息对应的目标小区的小区标识。
相应的，终端设备接收来自第一DU的第一指示消息。
步骤S702、终端设备向第二DU发送反馈信息，该反馈信息指示终端设备成功接收第一指示消息。
相应的，第二DU接收来自终端设备的反馈信息。
本申请实施例中，所述反馈信息可以为ACK信息，表示终端设备成功接收第一指示消息，用于通知第二DU终端设备执行移动性管理的时机，即终端设备采用目标小区配置信息进行通信的时机。所述“成功接收”也可以理解为成功解码或译码等含义。可选的，对于终端设备执行移动性管理的时机，可由网络侧配置向终端设备配置一段生效时间，例如x个时隙，则终端设备在发送所述反馈信息的x个时隙之后，开始采用目标小区配置信息。
该ACK信息可以通过PUCCH资源发送。例如，在一些可能的技术方案中，第一DU发送给终端设备的第二配置消息中包括目标小区的PUCCH资源配置信息，则终端设备可以根据该目标小区的PUCCH资源配置信息，在该PUCCH资源配置信息指示的PUCCH资源上，向第二DU发送ACK信息，以使第二DU知晓该终端设备将要进行移动性管理，例如将要切换到目标小区，或者将要添加或激活目标小区为服务小区，或者将要在目标小区的辅助下进行数据传输等等。
应注意，在一些可能的技术方案中，步骤702可以为可选步骤。例如，通过所述生效时间的配置，终端设备在第一指示消息发出/接收的x个时隙之后，开始采用目标小区配置信息。相应的，而第二DU可认为终端设备在第一指示消息发出/接收的x个时隙之后，开 始采用了目标小区配置信息。如此，基于上述配置或约定，终端设备与第二DU之间便可省略发送/接收反馈信息的步骤。
可选的，第二DU接收到来自终端设备的ACK信息后，如图7中的可选步骤S703所示，第二DU还可以向CU发送第二指示消息，用于通知CU：第二DU确认终端设备接收到第一指示消息，并将与该第二DU的目标小区建立数据通信。如此，CU可根据该第二指示消息，确定终端设备已完成到目标波束信息和/或目标小区的移动性管理。进一步地，如图7中的可选步骤S704所示，CU接收到来自第二DU的第二指示消息之后，还可以向第二DU发送该第二指示消息对应的响应消息，用于通知第二DU：CU确认接收到第二指示消息，或者CU确认终端设备接收到第一指示消息，并将与第二DU的目标小区建立数据通信。
可选的，如果终端设备没有成功接收第一指示消息，则终端设备可以向第一DU发送反馈信息，此时反馈信息可以为NACK信息，用于指示终端设备没有成功接收第一指示消息。该NACK信息可以通过PUCCH资源发送，例如终端设备可以根据当前的服务小区的PUCCH资源配置信息，在该PUCCH资源配置信息指示的PUCCH资源上向第一DU发送NACK信息，以使第一DU可以根据该NACK信息重传第一指示消息。
请参考图8，该移动性管理方法的另一种可能的实施方式包括如下流程：
步骤S801、第一DU向终端设备发送第一指示消息，该第一指示消息中包括目标波束信息和/或该目标波束信息对应的目标小区的小区标识。
相应的，终端设备接收来自第一DU的第一指示消息。
步骤S802、终端设备向第二DU发送随机接入前导码，该随机接入前导码用于第二DU确认终端设备成功接收第一指示消息。
相应的，第二DU接收来自终端设备的随机接入前导码。
所述随机接入前导码包括在目标小区的随机接入资源配置信息中，用于终端设备向目标小区发起随机接入过程。如果第二DU接收到该随机接入前导码，则可以认为终端设备与目标小区建立通信连接，可以进行数据通信。如上文中所述，目标小区的随机接入资源配置信息可以通过第二配置消息或第一指示消息发送给终端设备，不再赘述。
可选的，如果终端设备没有接收到第一指示消息，终端设备可以不作出响应，如果网络侧在一段时间内都没有接收到响应，则可以重新发送第一指示消息。例如，如果第二DU在一段时间没有接收到响应，则第二DU可以通知第一DU重新发送第一指示消息。
可选的，如果终端设备接收到了第一指示消息，但没有解码成功，终端设备可以发送响应指示网络侧重传。例如终端设备可以向第一DU发送响应，以便第一DU重新发送第一指示消息。
步骤S803、第二DU向终端设备发送随机接入响应(random access response，RAR)，该RAR响应于所述随机接入前导码。
相应的，终端设备接收来自第二DU的RAR。
所述RAR可包括以下一项或多项信息：目标小区的上行授权资源、目标小区为终端设备分配的终端设备标识信息、目标小区对应的TA信息。
其中，所述上行授权资源用于终端设备与目标小区后续进行数据传输。所述终端设备标识信息用于在目标小区标识终端设备，应注意，如果第二配置消息或第一指示消息中包 括目标小区为终端设备分配的终端设备标识信息(例如C-RNTI)，则RAR中可以包括目标小区为终端设备重新分配的终端设备标识信息(例如可能之前分配的终端设备标识信息已不可用)，或者也可以不包括终端设备标识信息。TA信息用于指示终端设备在目标小区进行上行发送时使用的定时提前量，以便目标小区在接收上行信号时进行时域对齐。
可选的，所述随机接入前导码可以为基于竞争的随机接入前导码。当随机前导码为基于竞争的随机接入前导码时，由于第二DU无法通过该随机接入前导码识别终端设备，则如图8中的可选步骤S804所示，终端设备可以向第二DU发送第三指示消息，该第三指示消息用于通知第二DU：终端设备接入该第二DU的目标小区。该第三指示消息中可以包括目标小区为该终端设备分配的终端设备标识信息，以使第二DU根据该终端设备标识信息识别终端设备接入目标小区。可选的，该第三指示消息可以为MAC CE消息。
根据上述内容可知，本申请实施例通过上述图7或图8所示的方法，可使第二DU确定终端设备执行移动性管理的时机，从而使用目标小区的目标波束与终端设备进行数据通信，避免发生数据中断。
应注意，上述图7和图8所示的方法，可以与上文中所述的方案一、方案二或方案三相互结合，也可以作为独立的方法实施，本申请并不限定。
本申请实施例还提供一种通信装置，请参考图9，为本申请实施例提供的一种通信装置的结构示意图，该通信装置900包括：收发模块910和处理模块920。该通信装置也可用于实现上述任一方法实施例中涉及第一DU或CU或第二DU的功能。例如，该通信装置可以是第一DU，或CU，或第二DU，或第一DU中包括的芯片或电路，或CU中包括的芯片或电路，或第二DU中包括的芯片或电路。
示例性的，当该通信装置执行图3中所示的方法实施例中对应第一DU的操作或者步骤时，收发模块910用于，接收终端设备上报的第一测量结果，该第一测量结果包括K个小区对应的测量结果，所述K个小区包括终端设备当前的服务小区和至少一个非服务小区，K为正整数；处理模块920用于，根据第一测量结果确定目标波束信息；收发模块910还用于：向CU发送第一请求消息，该第一请求消息中包括目标波束信息，该目标波束信息用于终端设备执行移动性管理；以及接收来自CU的第一响应消息，该第一响应消息用于指示目标波束信息是否被接受。
当该通信装置执行图3中所示的方法实施例中对应CU的操作或者步骤时，收发模块910用于：接收来自第一DU的第一请求消息，该第一请求消息中包括目标波束信息，该目标波束信息用于终端设备执行移动性管理；向第二DU发送第二请求消息，该第二请求消息中包括目标波束信息，该第二请求消息用于请求第二DU确认目标波束信息；接收来自第二DU的第二响应消息，该第二响应消息指示目标波束信息是否被接受；向第一DU发送第一响应消息，该第一响应消息指示目标波束信息是否被接受。
当该通信装置执行图3中所示的方法实施例中对应第二DU的操作或者步骤时，收发模块910用于，接收来自CU的第二请求消息，该第二请求消息中包括目标波束信息，该目标波束信息用于终端设备执行移动性管理，该第二请求消息用于请求第二DU确认目标波束信息；处理模块920用于，确定是否接受目标波束信息；收发模块910还用于，向CU发送第二响应消息，该第二响应消息用于指示是否接受目标波束信息。
当该通信装置执行图5中所示的方法实施例中对应第一DU的操作或者步骤时，收发 模块910用于，接收终端设备上报的第一测量结果，该第一测量结果包括K个小区对应的测量结果，所述K个小区包括终端设备当前的服务小区和至少一个非服务小区，K为正整数；处理模块920用于，根据第一测量结果确定至少一个候选波束信息；收发模块910还用于：向CU发送第一请求消息，该第一请求消息中包括至少一个候选波束信息，该第一请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理；以及接收来自CU的第一响应消息，该第一响应消息中包括目标波束信息。
当该通信装置执行图5中所示的方法实施例中对应CU的操作或者步骤时，收发模块910用于，CU接收来自第一DU的第一请求消息，该第一请求消息中包括至少一个候选波束信息，该第一请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理；处理模块920用于，根据所述至少一个候选波束信息确定目标波束信息；收发模块910还用于：向第二DU发送第二请求消息，该第二请求消息中包括目标波束信息，该第二请求消息用于请求第二DU确认目标波束信息；接收来自第二DU的第二响应消息，该第二响应消息用于指示目标波束信息是否被接受；以及向第一DU发送第一响应消息，该第一响应消息中包括目标波束信息。
当该通信装置执行图5中所示的方法实施例中对应第二DU的操作或者步骤时，收发模块910用于，接收来自CU的第二请求消息，该第二请求消息中包括目标波束信息，该目标波束信息用于终端设备执行移动性管理，该第二请求消息用于请求第二DU确认目标波束信息；处理模块920用于，确定是否接受目标波束信息；收发模块910还用于，向CU发送第二响应消息，该第二响应消息用于指示是否接受目标波束信息。
当该通信装置执行图6中所示的方法实施例中对应第一DU的操作或者步骤时，收发模块910用于，接收终端设备上报的第一测量结果，该第一测量结果包括K个小区对应的测量结果，所述K个小区包括所述终端设备当前的服务小区和至少一个非服务小区，K为正整数；处理模块920用于，根据第一测量结果确定至少一个候选波束信息；收发模块910还用于：向CU发送第一请求消息，该第一请求消息中包括至少一个候选波束信息，该第一请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理；以及接收来自CU的第一响应消息，该第一响应消息中包括目标波束信息。
当该通信装置执行图6中所示的方法实施例中对应CU的操作或者步骤时，收发模块910用于：接收来自第一DU的第一请求消息，该第一请求消息中包括至少一个候选波束信息，该第一请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理；向第二DU发送第二请求消息，该第二请求消息中包括所述至少一个候选波束信息，该第二请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息；接收来自第二DU的第二响应消息，该第二响应消息中包括目标波束信息；向所述第一DU发送第一响应消息，该第一响应消息中包括目标波束信息。
当该通信装置执行图6中所示的方法实施例中对应第二DU的操作或者步骤时，收发模块910用于，接收来自CU的第二请求消息，该第二请求消息中包括至少一个候选波束信息，该第二请求消息用于请求根据所述至少一个候选波束信息确定目标波束信息，该目标波束信息用于终端设备执行移动性管理；处理模块920用于，根据所述至少一个候选波束信息确定目标波束信息；收发模块910还用于，向CU发送第二响应消息，该第二响应 消息中包括目标波束信息。
该通信装置中涉及的处理模块920可以由至少一个处理器或处理器相关电路组件实现，收发模块910可以由至少一个收发器或收发器相关电路组件或通信接口实现。该通信装置中的各个模块的操作和/或功能分别为了实现图3至图8中所示方法的相应流程，为了简洁，在此不再赘述。可选的，该通信装置中还可以包括存储模块，该存储模块可以用于存储数据和/或指令，收发模块910和/或处理模块920可以读取存取模块中的数据和/或指令，从而使得通信装置实现相应的方法。该存储模块例如可以通过至少一个存储器实现。
上述存储模块、处理模块和收发模块可以分离存在，也可以全部或者部分模块集成，例如存储模块和处理模块集成，或者处理模块和收发模块集成等。
请参考图10，为本申请实施例中提供的一种通信装置的另一结构示意图。该通信装置可具体为接入网设备中的DU，用于实现上述任一方法实施例中涉及第一DU或第二DU的功能。
该DU 1000可以包括至少一个天线10011，至少一个射频单元10012，至少一个处理器10013和至少一个存储器10014。所述DU 1000主要用于射频信号的收发以及射频信号与基带信号的转换，以及部分基带处理。
在一个实施例中，所述DU 1000可以由一个或多个单板构成，多个单板可以共同支持单一接入指示的无线接入网(如5G网)，也可以分别支持不同接入制式的无线接入网(如LTE网，5G网或其他网)。所述存储器10014和处理器10013可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
请参考图11，为本申请实施例中提供的一种通信装置的另一结构示意图。该通信装置可具体为接入网设备中的CU，用于实现上述任一方法实施例中涉及CU的功能。
所述CU 1100可以包括至少一个存储器11021和至少一个处理器11022。所述CU 1100主要用于进行基带处理，对基站进行控制等。所述CU 1100是基站的控制中心，也可以称为处理单元。例如所述CU 1100可以用于控制基站执行上述图3至图8所示方法中关于CU对应的操作或步骤。
在一个实施例中，所述CU 1100可以由一个或多个单板构成，多个单板可以共同支持单一接入指示的无线接入网(如5G网)，也可以分别支持不同接入制式的无线接入网(如LTE网，5G网或其他网)。所述存储器11021和处理器11022可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外，每个单板上还可以设置有必要的电路。
本申请实施例还提供一种芯片系统，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该芯片系统实现上述任一方法实施例中的对应第一DU或CU或第二DU的方法。
可选地，该芯片系统中的处理器可以为一个或多个。该处理器可以通过硬件实现也可以通过软件实现。当通过硬件实现时，该处理器可以是逻辑电路、集成电路等。当通过软件实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现。
可选地，该芯片系统中的存储器也可以为一个或多个。该存储器可以与处理器集成在一起，也可以和处理器分离设置，本申请并不限定。示例性的，存储器可以是非瞬时性处理器，例如只读存储器ROM，其可以与处理器集成在同一块芯片上，也可以分别设置在 不同的芯片上，本申请对存储器的类型，以及存储器与处理器的设置方式不作具体限定。
示例性的，该芯片系统可以是现场可编程门阵列(field programmable gate array，FPGA)，可以是专用集成芯片(application specific integrated circuit，ASIC)，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
应理解，上述方法实施例中的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。
本申请实施例还提供一种计算机可读存储介质，所述计算机存储介质中存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机执行上述任一方法实施例中的方法。
本申请实施例还提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述任一方法实施例中的方法。
本申请实施例还提供一种通信系统，该通信系统包括第一DU、CU和第二DU。所述第一DU、CU和第二DU相互配合用于实现上述任一方法实施例中的方法。可选的，该通信系统还可包括终端设备。
应理解，本申请实施例中提及的处理器可以是CPU，还可以是其他通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器、可擦除可编程只读存储器、电可擦除可编程只读存储器或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器、动态随机存取存储器、同步动态随机存取存储器、双倍数据速率同步动态随机存取存储器、增强型同步动态随机存取存储器、同步连接动态随机存取存储器和直接内存总线随机存取存储器。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)集成在处理器中。
应注意，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，在本申请的各种实施例中涉及的各种数字编号仅为描述方便进行的区分，上述各过程或步骤的序号的大小并不意味着执行顺序的先后，各过程或步骤的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
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。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。

Claims (30)

  1. 一种移动性管理方法，其特征在于，所述方法应用于第一分布式单元DU，所述方法包括：
    接收终端设备上报的第一测量结果，所述第一测量结果包括K个小区对应的测量结果，所述K个小区包括所述终端设备当前的服务小区和至少一个非服务小区，K为正整数；
    向集中式单元CU发送第一请求消息，所述第一请求消息中包括目标波束信息，所述目标波束信息根据所述第一测量结果确定，所述目标波束信息用于所述终端设备执行移动性管理；
    接收来自所述CU的第一响应消息，所述第一响应消息用于指示所述目标波束信息是否被接受。
  2. 根据权利要求1所述的方法，其特征在于，所述第一请求消息中还包括以下一项或多项信息：所述目标波束信息对应的目标小区的小区标识、第二DU的标识信息或所述终端设备的传输状态信息，所述目标小区为所述第二DU的小区。
  3. 根据权利要求1或2所述的方法，其特征在于，若所述目标波束信息不被接受，所述第一响应消息中包括更新后的目标波束信息和/或所述更新后的目标波束信息对应的目标小区的小区标识。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第一指示消息，所述第一指示消息中包括所述目标波束信息和/或所述目标波束信息对应的目标小区的小区标识。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述CU的第一配置消息，所述第一配置消息中包括所述至少一个非服务小区对应的一组配置信息；
    向所述终端设备发送第二配置消息，所述第二配置消息中包括所述至少一个非服务小区对应的一组配置信息。
  6. 根据权利要求5所述的方法，其特征在于，所述一组配置信息包括对应小区的以下一项或多项配置信息：
    参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
  7. 一种移动性管理方法，其特征在于，所述方法应用于集中式单元CU，所述方法包括：
    接收来自第一分布式单元DU的第一请求消息，所述第一请求消息中包括目标波束信息，所述目标波束信息用于终端设备执行移动性管理；
    向所述第二DU发送第二请求消息，所述第二请求消息中包括所述目标波束信息，所述第二请求消息用于请求第二DU确认所述目标波束信息；
    接收来自所述第二DU的第二响应消息，所述第二响应消息指示所述目标波束信息是否被接受；
    向所述第一DU发送第一响应消息，所述第一响应消息指示所述目标波束信息是否被 接受。
  8. 根据权利要求7所述的方法，其特征在于，所述第一请求消息还包括以下一项或多项信息：所述目标波束信息对应的目标小区的小区标识、所述第二DU的标识信息或所述终端设备的传输状态信息；
    所述第二请求消息中还包括以下一项或多项信息：所述目标波束信息对应的目标小区的小区标识、所述第二DU的标识信息或所述终端设备的传输状态信息，所述目标小区为所述第二DU的小区。
  9. 根据权利要求7或8所述的方法，其特征在于，若所述目标波束信息不被接受，所述第一响应消息中包括更新后的目标波束信息和/或所述更新后的目标波束信息对应的目标小区的小区标识；
    所述第二响应消息中包括所述更新后的目标波束信息和/或所述更新后的目标波束信息对应的目标小区的小区标识。
  10. 根据权利要求7至9中任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述第二DU的第三配置消息，所述第三配置消息中包括所述目标小区对应的一组配置信息；
    向所述第一DU发送第一配置消息，所述第一配置消息中包括所述终端设备的至少一个非服务小区对应的一组配置信息。
  11. 根据权利要求10所述的方法，其特征在于，每组配置信息包括对应小区的以下一项或多项配置信息：
    参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
  12. 一种移动性管理方法，其特征在于，所述方法应用于第二分布式单元DU，所述方法包括：
    接收来自集中式单元CU的第二请求消息，所述第二请求消息中包括目标波束信息，所述目标波束信息用于终端设备执行移动性管理，所述第二请求消息用于请求所述第二DU确认所述目标波束信息；
    向所述CU发送第二响应消息，所述第二响应消息用于指示是否接受所述目标波束信息。
  13. 根据权利要求12所述的方法，其特征在于，所述第二请求消息中还包括以下一项或多项信息：所述目标波束信息对应的目标小区的小区标识、所述第二DU的标识信息或所述终端设备的传输状态信息，所述目标小区为所述第二DU的小区。
  14. 根据权利要求12或13所述的方法，其特征在于，若不接受所述目标波束信息，所述第二响应消息中包括所述第二DU更新后的目标波束信息和/或所述更新后的目标波束信息对应的目标小区的小区标识。
  15. 根据权利要求13或14所述的方法，其特征在于，所述方法还包括：
    向所述CU发送第三配置消息，所述第三配置消息中包括所述目标小区对应的一组配 置信息。
  16. 根据权利要求15所述的方法，其特征在于，所述一组配置信息包括所述目标小区的以下一项或多项配置信息：
    参考信号配置信息、测量配置信息、波束配置信息、准共址QCL信息、控制资源集合CORESET配置信息、搜索空间配置信息、时间提前量TA信息、终端设备标识信息、用于PDCCH加扰/解扰的序列信息、随机接入资源配置信息、物理上行控制信道PUCCH资源配置信息、无线链路监控配置信息、安全相关配置信息、媒体接入控制MAC配置信息、无线链路控制RLC配置信息、分组数据汇聚协议PDCP配置信息或业务数据适配协议SDAP配置信息。
  17. 根据权利要求12至16中任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述终端设备的反馈信息，所述反馈信息指示所述终端设备成功接收第一指示消息，所述第一指示消息中包括所述目标波束信息和/或所述目标波束信息对应的目标小区的小区标识。
  18. 根据权利要求17所述的方法，其特征在于，所述方法还包括：
    根据所述目标小区对应的物理上行控制信道PUCCH资源配置信息，接收所述反馈信息。
  19. 一种通信装置，其特征在于，包括用于执行如权利要求1至6中任一项所述方法的模块。
  20. 一种通信装置，其特征在于，包括用于执行如权利要求7至11中任一项所述方法的模块。
  21. 一种通信装置，其特征在于，包括用于执行如权利要求12至18中任一项所述方法的模块。
  22. 一种通信装置，其特征在于，包括处理器和存储器，所述处理器和所述存储器耦合，所述处理器用于控制所述装置实现如权利要求1至6中任一项所述的方法。
  23. 一种通信装置，其特征在于，包括处理器和存储器，所述处理器和所述存储器耦合，所述处理器用于控制所述装置实现如权利要求7至11中任一项所述的方法。
  24. 一种通信装置，其特征在于，包括处理器和存储器，所述处理器和所述存储器耦合，所述处理器用于控制所述装置实现如权利要求12至18中任一项所述的方法。
  25. 一种通信装置，其特征在于，包括处理器和接口电路，所述接口电路用于接收来自所述通信装置之外的其它通信装置的信号并传输至所述处理器或将来自所述处理器的信号发送给所述通信装置之外的其它通信装置，所述处理器通过逻辑电路或执行代码指令用于实现如权利要求1至6中任一项所述的方法。
  26. 一种通信装置，其特征在于，包括处理器和接口电路，所述接口电路用于接收来自所述通信装置之外的其它通信装置的信号并传输至所述处理器或将来自所述处理器的信号发送给所述通信装置之外的其它通信装置，所述处理器通过逻辑电路或执行代码指令用于实现如权利要求7至11中任一项所述的方法。
  27. 一种通信装置，其特征在于，包括处理器和接口电路，所述接口电路用于接收来自所述通信装置之外的其它通信装置的信号并传输至所述处理器或将来自所述处理器的信号发送给所述通信装置之外的其它通信装置，所述处理器通过逻辑电路或执行代码指令用于实现如权利要求12至18中任一项所述的方法。
  28. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序或指令，当所述计算机程序或指令被通信装置执行时，实现如权利要求1至6，或，7至11，或，12至18中任一项所述的方法。
  29. 一种通信系统，其特征在于，包括如权利要求19、22、25中任一项所述的通信装置、如权利要求20、23、26中任一项所述的通信装置和如权利要求21、24、27中任一项所述的通信装置。
  30. 一种计算机程序产品，其特征在于，所述计算机程序产品包括指令，当所述指令被计算机运行时，实现如权利要求1至6，或，7至11，或，12至18中任一项所述的方法。
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