WO2024067422A1 - Procédé de transfert et appareil de communication - Google Patents

Procédé de transfert et appareil de communication Download PDF

Info

Publication number
WO2024067422A1
WO2024067422A1 PCT/CN2023/120864 CN2023120864W WO2024067422A1 WO 2024067422 A1 WO2024067422 A1 WO 2024067422A1 CN 2023120864 W CN2023120864 W CN 2023120864W WO 2024067422 A1 WO2024067422 A1 WO 2024067422A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
candidate
switching
subsequent
terminal
Prior art date
Application number
PCT/CN2023/120864
Other languages
English (en)
Chinese (zh)
Inventor
顾志方
范强
酉春华
史玉龙
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2024067422A1 publication Critical patent/WO2024067422A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment

Definitions

  • the present application relates to the field of communication technology, and in particular to a switching method and a communication device.
  • the fifth generation (5G) new radio supports layer 1 (L1)/layer 2 (L2) switching technology.
  • the centralized unit (CU) can configure the configuration information of the candidate cell to the terminal, and the terminal performs measurement reporting based on the configuration information.
  • the source distributed unit (DU) can instruct the terminal to perform L1/L2 switching based on the measurement reporting results of the terminal. After performing the L1/L2 switching, the terminal and the network side will release the configuration of the source cell and other candidate cells. If you want to perform the next switching, the network side needs to reconfigure the corresponding resources for the terminal, which is time-consuming and requires a certain signaling overhead.
  • the present application provides a switching method and a communication device, which can realize subsequent switching, thereby reducing the switching delay, and can avoid the frequent candidate cell reconfiguration process and save signaling overhead.
  • a switching method is provided, which can be performed by a first network device, or by a component of the first network device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the functions of the first network device.
  • the first network device can be a CU.
  • the method includes: obtaining configuration information of at least one candidate cell, part or all of the at least one candidate cell being allowed to be used as target cells in a switching process; sending first configuration information to a second network device, the first configuration information including the configuration information of the at least one candidate cell, and first indication information and/or subsequent candidate cell information, the subsequent candidate cell information indicating at least one cell that is allowed to be used as a target cell in a subsequent switching process, the first indication information indicating that subsequent switching can be performed, the second network device being a network device corresponding to the first cell, and the first cell being a current serving cell of the terminal.
  • the first network device can determine whether to allow subsequent switching, and send the first indication information and/or subsequent candidate cell information to the second network device if the subsequent switching is allowed.
  • the second network device can provide the information to the terminal, and the terminal determines that subsequent switching can be performed based on the information, and can further perform measurement reporting based on the information, so as to achieve subsequent switching.
  • the terminal can quickly complete cell switching in a fast-moving scenario, thereby reducing the switching delay, and can avoid the frequent candidate cell reconfiguration process, saving signaling overhead.
  • the second network device may be a DU, that is, the second network device is a DU corresponding to the first cell.
  • the switching is an L1/L2 switching
  • the subsequent switching is a subsequent L1/L2 switching.
  • the configuration information of the candidate cell may include the measurement reference signal configuration of the candidate cell, and the measurement reference signal configuration is used by the terminal to perform cell measurement.
  • the configuration information of the candidate cell may also include information required for accessing the cell, such as physical downlink control channel (PDCCH) information.
  • PDCCH physical downlink control channel
  • the at least one cell allowed to be the target cell in a subsequent switching process includes part or all of the at least one candidate cell, or the at least one cell allowed to be the target cell in a subsequent switching process includes part or all of the at least one candidate cell and the first cell; and the method also includes: sending second configuration information to at least one network device corresponding to the at least one candidate cell, the second configuration information includes the first indication information and/or the subsequent candidate cell information, and the measurement reference signal configuration of the at least one candidate cell in the configuration information of the at least one candidate cell.
  • the terminal can switch from the first cell to any candidate cell through a switching process.
  • the candidate cell to which the terminal switches is the current serving cell
  • the terminal can also switch to a cell that is allowed to be a target cell in a subsequent switching process through a subsequent switching process.
  • the first network device can determine whether to allow subsequent switching, and determine the cell that allows subsequent switching if subsequent switching is allowed, and inform the terminal and the switching decision node (that is, at least one network device corresponding to the at least one candidate cell) of necessary information related to the subsequent switching, so that the switching decision node can control the terminal to perform subsequent switching according to the measurement report result of the terminal.
  • the terminal can quickly complete cell switching in a fast-moving scenario, thereby reducing the switching delay, and avoiding the frequent candidate cell reconfiguration process, saving signaling overhead.
  • the method before sending the first configuration information to the second network device, the method also includes: receiving reporting information from the network devices corresponding to the at least one candidate cell, wherein the reporting information of the network device corresponding to any candidate cell indicates the cell managed by the network device that is allowed to be the target cell in the subsequent switching process; and determining the subsequent candidate cell information based on the reporting information.
  • the network device corresponding to the candidate cell can determine whether some candidate cells are suitable for providing subsequent switching access according to the actual situation of the candidate cell, and inform the first network device of the situation, and the first network device can further inform the relevant network devices and/or the terminal, so that subsequent switching can be achieved.
  • the terminal can quickly complete the cell switching in a fast-moving scenario, thereby reducing the switching delay, and avoiding the frequent candidate cell reconfiguration process, saving signaling overhead.
  • the subsequent candidate cell information indicates the measurement cells corresponding to the first cell and the at least one candidate cell, respectively.
  • the measurement cell corresponding to any candidate cell is a cell that is allowed to perform cell measurement when the candidate cell is a serving cell
  • the measurement cell corresponding to the first cell is a cell that is allowed to perform cell measurement when the first cell is a serving cell.
  • the terminal when a certain cell is the current serving cell of the terminal, the terminal only performs cell measurement on the measurement cell corresponding to the cell and reports it. In some embodiments, the terminal may also perform cell measurement on the cell and report it.
  • the first network device can determine whether to allow subsequent switching, and if subsequent switching is allowed, determine each candidate cell and the cell corresponding to the source cell that is allowed to be accessed through switching or subsequent switching (i.e., the measurement cell), and then inform the terminal of the necessary information related to the switching and subsequent switching.
  • the terminal accordingly measures and reports the measurement cell corresponding to the current service cell, and the switching decision node (the second network device or the network device corresponding to the candidate cell) learns the cell that can be accessed through switching or subsequent switching based on the received measurement report.
  • subsequent switching can be achieved.
  • the terminal can quickly complete cell switching in fast-moving scenarios, thereby reducing switching delays, while avoiding frequent candidate cell reconfiguration processes and saving signaling overhead.
  • the measurement cell corresponding to the third cell before switching from the first cell to the second cell and from the second cell to the third cell, the measurement cell corresponding to the third cell includes the second cell; after switching from the first cell to the second cell and from the second cell to the third cell, the method also includes: receiving update information from a network device corresponding to the second cell, the update information indicating that the second cell cannot continue to serve as the measurement cell corresponding to the third cell; and sending the update information to the network device corresponding to the third cell.
  • the candidate cell for subsequent handover access can be flexibly adjusted according to the network status, thereby improving the overall resource utilization.
  • the method also includes: sending switching decision criterion indication information to the first network device and at least one network device corresponding to the at least one candidate cell, the switching decision criterion being used by the first network device and the at least one network device corresponding to the at least one candidate cell to determine whether to perform switching or subsequent switching when they serve as the network devices corresponding to the service cell of the terminal.
  • the switching decision criteria of each decision node can be flexibly configured, which is conducive to improving the overall resource utilization.
  • the first configuration information also includes a timing advance (TA) corresponding to each of the at least one candidate cell; and before sending the first configuration information to the second network device, the method also includes: obtaining the TA corresponding to the at least one candidate cell from at least one network device corresponding to the at least one candidate cell.
  • TA timing advance
  • the handover decision node can carry the TA of the target cell in the handover command, so that the terminal can access the target cell in a random access-free manner, thereby reducing the access delay.
  • the first configuration information further includes the number of subsequent handovers. For example, if the number of subsequent handovers is 2, the terminal may release the configuration information of the candidate cell after performing 3 subsequent handovers in total.
  • a switching method is provided, which can be executed by a second network device, or by a component of the second network device (such as a processor, a chip, or a chip system, etc.), or by a processor that can realize all or part of the functions of the second network device.
  • the second network device is a network device corresponding to the first cell, and the first cell is a current serving cell of the terminal.
  • the second network device may be a DU corresponding to the first cell.
  • the method includes: receiving first configuration information from a first network device; sending third configuration information to the terminal according to the first configuration information, the third configuration information including first indication information and/or subsequent candidate cell information, the subsequent candidate cell information indicating at least one cell allowed to be a target cell in a subsequent switching process, and the first indication information indicating that a subsequent switching can be performed.
  • the first network device for example, CU
  • the second network device can provide the information to the terminal, and the terminal can perform measurement reporting based on the information, so as to achieve subsequent switching.
  • the terminal can quickly complete cell switching in a fast-moving scenario, thereby reducing the switching delay, and at the same time avoiding the frequent candidate cell reconfiguration process, saving signaling overhead.
  • the subsequent switching is a subsequent L1/L2 switching.
  • the first configuration information includes the first indication information and/or the subsequent candidate cell information.
  • the first configuration information and the third configuration information may further include: configuration information of at least one candidate cell.
  • the candidate cell is allowed to be used as a target cell in the handover process.
  • the first configuration information and the third configuration information are the same.
  • the subsequent candidate cell information indicates at least one candidate cell and the at least one cell in the first cell that is allowed to be a target cell in a subsequent switching process, and the candidate cell is allowed to be a target cell in the switching process.
  • the subsequent candidate cell information indicates the measurement cells corresponding to the at least one candidate cell and the first cell respectively, the measurement cell corresponding to any candidate cell is a cell that is allowed to perform cell measurement when the candidate cell is a serving cell, and the measurement cell corresponding to the first cell is a cell that is allowed to perform cell measurement when the first cell is a serving cell.
  • the first configuration information further includes the number of subsequent handovers. For example, if the number of subsequent handovers is 2, the terminal may release the configuration information of the candidate cell after performing 3 subsequent handovers in total.
  • a handover method is provided, which can be performed by a second network device, or by a component of the second network device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the functions of a third network device.
  • the third network device is a DU corresponding to the second cell.
  • the method comprises: receiving second configuration information from a first network device, the second configuration information comprising subsequent candidate cell information, the subsequent candidate cell information indicating at least one candidate cell and at least one of the first cells that is allowed to be a target cell in a subsequent switching process, the first cell being a current serving cell of the terminal, and the candidate cell being allowed to be a target cell in the switching process; after switching from the first cell to the second cell of the third network device, receiving a measurement report from the terminal, the second cell belonging to the at least one candidate cell; and sending a switching command to the terminal according to the measurement report and the second configuration information, the switching command indicating switching from the second cell to the third cell, the third cell belonging to the cell allowed to be a target cell in the subsequent switching process.
  • the first network device for example, CU
  • the first network device can determine whether to allow subsequent switching, and send the cell information available for subsequent switching access to the network device corresponding to the candidate cell (including the third network device) if the subsequent switching is allowed, so that the network device corresponding to the candidate cell can switch the terminal to the cell available for subsequent switching access through subsequent switching according to the measurement report of the terminal, thereby realizing subsequent switching.
  • the terminal can quickly complete the cell switching in a fast-moving scenario, thereby reducing the switching delay, and can avoid the frequent candidate cell reconfiguration process, saving signaling overhead.
  • the subsequent switching is a subsequent L1/L2 switching.
  • the second configuration information includes the measurement configuration of the at least one candidate cell or the measurement configuration of the at least one cell allowed to be the target cell in a subsequent handover process.
  • the second configuration information also includes a timing advance TA of the at least one candidate cell.
  • the handover command includes the TA of the third cell, and the handover command is further used to indicate access to the third cell in a random access-free manner.
  • the method before sending the handover command to the terminal according to the measurement report and the second configuration information, the method further includes: receiving handover decision criterion indication information from the first network device; wherein sending the handover command to the terminal according to the measurement report and the second configuration information includes: according to the measurement report, the second configuration information, and the The handover command is sent to the terminal according to the handover decision criterion indicated by the handover decision criterion indication information.
  • the method before the terminal switches from the first cell to the second cell, the second cell belongs to the cell that is allowed to be the target cell in the subsequent switching process; after the terminal switches to the third cell, the method also includes: receiving update information from the first network device, the update information indicating that the second cell cannot continue to be the cell that is allowed to be the target cell in the subsequent switching process; based on the update information, determining not to switch the terminal to the second cell in the subsequent switching.
  • a handover method is provided, which can be performed by a third network device, or by a component of the third network device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can implement all or part of the functions of the third network device.
  • the third network device is a DU corresponding to the second cell.
  • the method comprises: after a terminal switches from a first cell to a second cell of the third network device, receiving a measurement report from the terminal, the second cell belonging to at least one candidate cell, the candidate cell being allowed to be a target cell in a switching process, the measurement report comprising a measurement result of a measurement cell corresponding to the second cell, the measurement cell corresponding to the second cell being a cell that is allowed to perform cell measurement when the second cell is a serving cell; and sending a switching command to the terminal according to the measurement report, the switching command instructing the terminal to switch from the second cell to a third cell, the third cell belonging to the measurement cell corresponding to the second cell.
  • the terminal reports the measurement result of the measurement cell corresponding to the second cell to the third network device, so that the third network device can switch the terminal to a cell that the second cell can access, thereby realizing subsequent switching.
  • the terminal can quickly complete cell switching in a fast-moving scenario, thereby reducing switching delay, avoiding frequent candidate cell reconfiguration processes, and saving signaling overhead.
  • the method before sending a switching command to the terminal according to the measurement report, the method further includes: receiving a timing advance TA of the third cell from the first network device.
  • the handover command includes the TA of the third cell, and the handover command is further used to instruct the terminal to access the third cell in a random access-free manner.
  • the method before sending a switching command to the terminal based on the measurement report, the method also includes: receiving switching decision criterion indication information from the first network device; wherein, sending a switching command to the terminal based on the measurement report includes: sending the switching command to the terminal based on the switching decision criterion indicated by the measurement report and the switching decision criterion indication information.
  • the second cell belongs to the measurement cell corresponding to the third cell; after the terminal switches to the third cell, the method further includes: receiving update information from the first network device, the update information indicating that the second cell cannot continue to serve as the measurement cell corresponding to the third cell; based on the update information, determining not to switch the terminal to the second cell in a subsequent switch.
  • a switching method is provided, which can be executed by a terminal, or by a component of the terminal (such as a processor, chip, or chip system, etc.), or by a logic module or software that can implement all or part of the terminal functions.
  • the method includes: receiving third configuration information from a second network device, the second network device is a network device corresponding to a first cell, the first cell is a current service cell of a terminal, the third configuration information includes first indication information and/or subsequent candidate cell information, the subsequent candidate cell information indicates at least one cell allowed to be a target cell in a subsequent switching process, and the first indication information indicates that subsequent switching can be performed; after switching from the first cell to the target cell, performing subsequent switching according to the third configuration information.
  • the second network device (for example, the DU corresponding to the first cell) can provide the terminal with information related to the subsequent handover, and the terminal can perform measurement reporting based on the information, thereby realizing the subsequent handover.
  • the terminal can quickly complete the cell handover in a fast-moving scenario, thereby reducing the handover delay, and avoiding the frequent candidate cell reconfiguration process, saving signaling overhead.
  • the subsequent candidate cell information indicates at least one candidate cell and at least one of the first cells that is allowed to be a target cell in a subsequent switching process, and the candidate cell is allowed to be a target cell in the switching process; or, the subsequent candidate cell information indicates the measurement cells corresponding to the at least one candidate cell and the first cell respectively, the measurement cell corresponding to any candidate cell is a cell that is allowed to perform cell measurement when the candidate cell is a serving cell, and the measurement cell corresponding to the first cell is a cell that is allowed to perform cell measurement when the first cell is a serving cell.
  • the method further includes: releasing configuration information of the at least one candidate cell and a cell in the first cell that is not allowed to be a target cell in a subsequent switching process; or releasing Configuration information of at least one non-measurement cell is stored, and the measurement cells corresponding to the at least one candidate cell and the first cell respectively do not include the at least one non-measurement cell.
  • the terminal load can be reduced by releasing the configuration information of unnecessary cells.
  • subsequent switching is performed according to the third configuration information, including: sending a measurement report to a third network device, the third network device is a network device corresponding to the second cell, the measurement report includes the measurement result of the measurement cell corresponding to the second cell, or the measurement report includes the measurement result of the at least one candidate cell; receiving a switching command from the third network device, the switching command is generated according to the measurement report; according to the switching command, switching from the second cell to a third cell, the third cell belongs to the measurement cell corresponding to the second cell, or the third cell belongs to the cell allowed to be the target cell in the subsequent switching process.
  • the third configuration information also includes the number of subsequent handovers. For example, if the number of subsequent handovers is 2, the terminal can release the configuration information of the candidate cell after performing 3 subsequent handovers in total.
  • a communication device comprising a module or unit for executing the method in the first aspect or any possible implementation manner of the first aspect.
  • a communication device comprising a module or unit for executing the method in the second aspect or any possible implementation of the second aspect, or comprising a module or unit for executing the method in the third aspect or any possible implementation of the third aspect, or comprising a module or unit for executing the method in the fourth aspect or any possible implementation of the fourth aspect.
  • a communication device comprising a module or unit for executing the method in the fifth aspect or any possible implementation manner of the fifth aspect.
  • a communication device comprising a processor, wherein the processor is coupled to a memory, the memory being used to store computer programs or instructions, and the processor being used to execute the computer programs or instructions stored in the memory to implement a method in any one of the above aspects or any possible implementation of any one of the aspects.
  • the device further includes a memory coupled to the processor.
  • processors there are one or more processors and/or one or more memories.
  • the memory may be integrated with the processor, or the memory may be separately provided with the processor.
  • the device further includes a communication interface, and the processor is coupled to the communication interface.
  • the device is a first network device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the device is a chip in the first network device.
  • the communication interface may be an input/output interface.
  • the device is a second network device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the device is a chip in the second network device.
  • the communication interface may be an input/output interface.
  • the device is a third network device.
  • the communication interface may be a transceiver, or an input/output interface.
  • the device is a chip in the third network device.
  • the communication interface may be an input/output interface.
  • the device is a terminal.
  • the communication interface may be a transceiver, or an input/output interface.
  • the device is a chip in a terminal.
  • the communication interface may be an input/output interface.
  • a processor comprising: an input circuit, an output circuit, and a processing circuit.
  • the processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any one of the above aspects or any possible implementation of any one of the aspects.
  • the above-mentioned processor can be a chip
  • the input circuit can be an input pin
  • the output circuit can be an output pin
  • the processing circuit can be a transistor, a gate circuit, a trigger, and various logic circuits.
  • the input signal received by the input circuit can be, for example, but not limited to, received and input by a receiver
  • the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter
  • the input circuit and the output circuit can be the same circuit, which is used as an input circuit and an output circuit at different times.
  • This application does not limit the specific implementation of the processor and various circuits.
  • a communication system comprising one or more of the following: the first network device in the first aspect; The second network device in the second aspect; the third network device in the third aspect or the fourth aspect; the terminal in the fifth aspect.
  • a computer program product which includes: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute a method in any one of the above aspects or any one of the possible implementations of any one of the aspects.
  • a computer program also referred to as code, or instruction
  • a computer-readable storage medium which stores a computer program (also referred to as code, or instruction).
  • a computer program also referred to as code, or instruction.
  • the computer program runs on a computer, the computer executes a method in any one of the above aspects or any possible implementation of any one of the aspects.
  • a chip comprising a processor, wherein the processor is used to call and run a computer program from a memory, so that a communication device equipped with the chip executes a method in any of the above aspects or any possible implementation of any of the aspects.
  • FIG1 is a schematic diagram of a communication system provided in an embodiment of the present application.
  • FIG2 is a schematic diagram of a CU/DU separation architecture provided in an embodiment of the present application.
  • FIG3 is a flowchart of a cell switching process within the same DU provided in an embodiment of the present application.
  • FIG4 is a flowchart of a cell switching process between different DUs under the same CU provided by an embodiment of the present application
  • FIG5 is a schematic flow chart of a switching method provided in an embodiment of the present application.
  • FIG6 is a schematic diagram of another communication system provided in an embodiment of the present application.
  • FIG7 is a schematic diagram of a correspondence relationship between a network and a cell provided in an embodiment of the present application.
  • FIG8 is a schematic diagram of information at different levels provided by an embodiment of the present application.
  • FIG9 is a schematic flow chart of another switching method provided in an embodiment of the present application.
  • FIG10 is a schematic flowchart of updating a subsequent access accessible cell provided in an embodiment of the present application.
  • FIG11 is a schematic block diagram of a communication device provided in an embodiment of the present application.
  • FIG12 is a schematic block diagram of another communication device provided in an embodiment of the present application.
  • FIG13 is a schematic structural diagram of a terminal provided in an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of an access network device provided in an embodiment of the present application.
  • At least one of the following or its similar expressions refers to any combination of these items, including any combination of single items or plural items.
  • at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple.
  • words such as “first” and “second” are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and execution order, and words such as “first” and “second” do not necessarily limit them to be different.
  • the technical solutions of the embodiments of the present application can be applied to a variety of communication systems, for example, the fifth generation (5G) system, new radio (NR) or other communication systems that may appear in the future.
  • 5G fifth generation
  • NR new radio
  • FIG1 is a schematic diagram of the architecture of a mobile communication system provided by the present application.
  • the mobile communication system 100 includes an access network device 110 and at least one terminal (e.g., the terminal 120 shown in FIG1 ).
  • the access network device 110 and the terminal 120 can communicate data via a wireless connection.
  • FIG1 is only a schematic diagram, and FIG1 may also include more terminals.
  • the terminal in the embodiment of the present application is also called user equipment (UE), mobile station (MS), mobile terminal (MT), etc., and refers to a device that provides voice and/or data connectivity to the user.
  • the terminal can be a mobile phone, a tablet computer, a laptop computer, a PDA, a mobile Mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
  • the access network device in the embodiment of the present application refers to a radio access network (RAN) node (or device) that connects a terminal to a wireless network, which can also be called a base station.
  • the access network device can be an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system or an access point (AP) in a WiFi system, a wireless controller in a cloud radio access network (CRAN) scenario, a relay station, an access point, a vehicle-mounted device, a wearable device, and access network devices in other communication systems that evolve in the future.
  • RAN radio access network
  • the present application does not limit the specific technology and specific device form adopted by the access network device.
  • FIG2 shows a schematic diagram of a CU/DU separation architecture.
  • access network equipment such as a gNB or a 5G base station
  • a gNB or a 5G base station
  • a DU is connected to a CU
  • each DU can be connected to a CU via a FI logical interface.
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • SDAP service data adaptation protocol
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the communication link between the terminal and the access network device changes due to the movement of the terminal.
  • the access network device will instruct the terminal to perform cell switching according to the movement of the terminal.
  • one cell switching method is L1/L2 switching.
  • L1 refers to the physical layer
  • L2 includes the MAC, RLC, PDCP, and SDAP layers.
  • L1/L2 switching means that switching-related operations are mainly performed at the physical layer and the MAC layer.
  • the terminal sends the L1 measurement results to the access network device through the physical layer control signaling (carried on the physical uplink control channel (PUCCH)).
  • the physical layer of the access network device reads the L1 measurement results.
  • the access network device makes a switching decision and sends it to the terminal through L1/L2 signaling.
  • the L1/L2 signaling can be a message carried on the physical downlink control channel (PDCCH) or a MAC control element (MAC CE).
  • L1/L2 switching can be replaced by L1 and/or L2.
  • L1 and/or L2 When it is an "and” relationship, the operations related to the switching process are mainly completed by L1 and L2; when it is an “or” relationship, the operations related to the switching process are mostly completed by L1 or L2.
  • L1/L2 switching is a lower-level switching relative to L3 switching.
  • L1/L2 switching is applicable to: (1) cell switching across DUs within the same CU (i.e., the source cell and the target cell belong to different DUs under the same CU); (2) cell switching within the same DU (i.e., the source cell and the target cell belong to the same DU).
  • L1/L2 switching has evolved and can also be applied to cell switching across CUs. This application does not limit specific application scenarios.
  • Fig. 3 shows a schematic diagram of a cell switching process within the same DU.
  • the flow chart shown in Fig. 3 may include steps S301 to S305.
  • S301 The CU sends configuration information of at least one candidate cell to the terminal via the DU.
  • the terminal sends L1 measurement results of different cells to the DU through the communication resources of the source cell.
  • the L1 measurement result may include the L1 measurement result of the source cell and/or the L1 measurement result of the at least one candidate cell.
  • the L1 measurement result of the source cell and/or the at least one candidate cell may be a cell-level measurement result or a beam-level measurement result.
  • the DU determines, based on L1 measurement results of different cells, that the terminal should perform L1/L2 switching.
  • the DU sends the identification information of the target cell to the terminal through L1/L2 signaling.
  • the L1/L2 signaling is sent via the communication resources of the source cell. Further, the L1/L2 switching command may indicate beam direction information that the terminal should use when communicating with the target cell.
  • S305 The terminal performs L1/L2 switching.
  • the terminal uses the configuration information of the target cell received in S301 to access the target cell, and after successful access, starts to communicate with the target cell. Uplink and downlink data transmission. Further, the terminal may use the beam direction information indicated in S304 to perform uplink and downlink data transmission with the target cell.
  • the DU may inform the CU that the terminal has switched from the source cell to the target cell.
  • the CU and the DU release the configuration of the source cell and other candidate cells, and the terminal also releases the configuration of the source cell and the at least one candidate cell.
  • FIG4 shows a schematic diagram of a cell switching process between different DUs under the same CU.
  • the flowchart shown in FIG4 may include steps S401 to S406.
  • DU1 is an S-DU
  • S-DU refers to a source DU, i.e., a DU that manages a source cell
  • DU2 is a T-DU
  • T-DU refers to a target DU, i.e., a DU that manages a target cell.
  • T-DU is one of at least one candidate cell
  • the DUs corresponding to the at least one candidate cell include DU2 and DU3.
  • CU establishes terminal context with DU2 and DU3, obtains configuration information of cells managed by DU2 and DU3, and the cells managed by DU2 and DU3 are selected as candidate cells.
  • S402 The CU sends configuration information of at least one candidate cell to the terminal through the source DU.
  • the terminal sends the L1 measurement results of different cells to the source DU through the communication resources of the source cell.
  • the L1 measurement results may include the L1 measurement results of the source cell and/or the L1 measurement results of the at least one candidate cell.
  • the L1 measurement results of the source cell and/or the at least one candidate cell may be cell-level measurement results or beam-level measurement results.
  • the source DU determines, based on L1 measurement results of different cells, that the terminal should perform L1/L2 switching.
  • the source DU sends the identification information of the target cell to the terminal via L1/L2 signaling.
  • the terminal accesses the target DU.
  • the target DU may be referred to as a candidate DU before switching; when the switching decision determines that the target cell is a cell managed by a candidate DU, the candidate DU may be referred to as a target DU.
  • the target DU notifies the CU, and the CU notifies the source DU that the terminal has switched from the source cell to the target cell.
  • the CU, the source DU, and the target DU may release the configuration of the source cell and other candidate cells respectively, and the terminal also releases the configuration of the source cell and the at least one candidate cell.
  • the terminal and access network equipment After performing an L1/L2 cell switching, the terminal and access network equipment will release the configuration of the source cell and other candidate cells. If you want to perform the next switching, the access network equipment needs to re-acquire and configure the corresponding candidate cell configuration for the terminal, which is time-consuming and requires certain signaling overhead.
  • the present application provides a switching method, which can realize subsequent L1/L2 cell switching under the CU-DU separation architecture, and the access network device and the terminal can align the configuration of whether to perform subsequent L1/L2 switching.
  • the access network device and the terminal can align the configuration of whether to perform subsequent L1/L2 switching.
  • handover may refer to L1/L2 handover (or L1/L2 cell handover)
  • subsequent handover may refer to subsequent L1/L2 handover (or subsequent L1/L2 cell handover).
  • the L1/L2 switch may be replaced by an L1 and/or L2 switch, and correspondingly, the subsequent L1/L2 switch may also be replaced by a subsequent L1 and/or L2 switch.
  • L1/L2 switching and “subsequent L1/L2 switching” may also be replaced by other names, but these names do not have any impact on the nature of switching.
  • the subsequent switching or subsequent L1/L2 switching refers to a switching that does not release and reconfigure the corresponding configuration after switching (i.e., the first or initial switching) and can be performed using the configuration of the previous switching.
  • the following mainly describes the solution by taking the cell switching scenario between different DUs as an example. It should be understood that the method provided in the present application is also applicable to the cell switching scenario between the same DU.
  • the information interaction process between the DU corresponding to the cell where the terminal resides before the switching and the DU corresponding to the cell where the terminal resides after the switching (for example, DU1 and DU2, DU2 and DU3) can be understood as information processing within the DU in the cell switching of the same DU.
  • the CU in the following text can be replaced by a network device with PDCP and RRC layer functions; the DU can be replaced by a network device with physical layer and MAC layer functions, for example, the source DU can be replaced by a network device that manages the source cell (the current service cell of the terminal device), and DU2 can be replaced by a network device that manages the candidate cell (target cell).
  • the CU in the following text can be replaced by a network device with PDCP and RRC layer functions
  • the DU can be replaced by a network device with physical layer and MAC layer functions
  • the source DU can be replaced by a network device that manages the source cell (the current service cell of the terminal device)
  • DU2 can be replaced by a network device that manages the candidate cell (target cell).
  • the CU and the network device with PDCP and RRC layer functions can both be called: the first network device; the source DU and the network device managing the source cell (the current service cell of the terminal device) can both be called: the second network device, among which DU2 and the network device managing the candidate cell (target cell) can be called: the third network device.
  • the source DU and target DU, as well as the source cell and target cell will also change as the terminal moves.
  • cell 0 when the current serving cell of the terminal is cell 0, cell 0 can be called the source cell, and DU1 corresponding to cell 0 can be called the source DU.
  • cell 1 When the terminal switches from cell 0 to cell 1, cell 1 can be called the target cell, and DU2 corresponding to cell 1 can be called the target DU.
  • the current serving cell of the terminal becomes cell 1.
  • cell 1 can be called the source cell
  • DU2 corresponding to cell 1 can be called the source cell.
  • cell 2 When the terminal switches from cell 1 to cell 2, cell 2 can be called the target cell, and DU3 corresponding to cell 2 can be called the target DU.
  • the current serving cell of the terminal becomes cell 2.
  • cell 2 can be called the source cell, and DU3 corresponding to cell 2 can be called the source cell.
  • the serving cell of the terminal is cell 0, and the DU corresponding to cell 0 is DU1.
  • the source DU and target DU, as well as the source cell and target cell will change as the terminal moves, in the following description, the source DU only refers to DU1, and the source cell only refers to cell 0.
  • the terminal in the schematic flowchart may also be a chip, a chip system, or a processor that supports the terminal to implement the method, or a logic module or software that can implement all or part of the terminal functions;
  • the CU in the schematic flowchart may also be a chip, a chip system, or a processor that supports the CU to implement the method, or a logic module or software that can implement all or part of the CU functions;
  • the DU in the schematic flowchart (for example, DU1, DU2, DU3 or DU4) may also be a chip, a chip system, or a processor that supports the DU to implement the method, or a logic module or software that can implement all or part of the DU functions.
  • Fig. 5 is a schematic flow chart of a switching method provided by the present application.
  • the method 500 may include S501 to S505.
  • the method 500 may also include one or more steps from S506 to S512. Each step is described below.
  • CU sends request information to candidate DU.
  • candidate DU receives request information from CU.
  • the request information is used to request configuration information of candidate cells.
  • a candidate cell refers to a cell that is allowed to be a target cell in a handover process, that is, during a handover process, a terminal may switch from a source cell to a candidate cell.
  • DU1 is the DU corresponding to the current serving cell of the terminal (i.e., cell 0), that is, DU1 is the source DU, and the candidate DUs are DU2, DU3, and DU4. It should be understood that in some examples, DU1 can also be used as a candidate DU, and one or more cells other than cell 0 in the cells managed by DU1 can also be used as candidate cells.
  • CU can request configuration information of candidate cells from DU2, DU3 and DU4 respectively. That is, CU requests configuration information of candidate cells corresponding to DU2 (i.e., one or more cells managed by DU2) from DU2, requests configuration information of candidate cells corresponding to DU3 (i.e., one or more cells managed by DU3) from DU3, and requests configuration information of candidate cells corresponding to DU4 (i.e., one or more cells managed by DU4) from DU4. It should be understood that if DU1 is also a candidate DU, CU can also request configuration information of candidate cells corresponding to DU1 from DU1.
  • the request information may be a UE CONTEXT SETUP REQUEST message on the F1 interface or a UE CONTEXT MODIFICATION REQUEST message on the F1 interface.
  • the request information may be carried by a UE CONTEXT SETUP REQUEST message or a UE CONTEXT MODIFICATION REQUEST message.
  • the CU also sends a request message to the source DU, requesting configuration information of the source cell.
  • the candidate DU sends configuration information of the candidate cell to the CU.
  • the CU receives configuration information of the candidate cell corresponding to the candidate DU from the candidate DU.
  • S502 specifically includes: DU2 sends configuration information of the candidate cell corresponding to DU2 to CU, and DU3
  • the configuration information of the candidate cell corresponding to DU3 is sent to CU
  • DU4 sends the configuration information of the candidate cell corresponding to DU4 to CU.
  • the configuration information of the candidate cell may include two parts, respectively recorded as: configuration #A and configuration #B.
  • Configuration #A requires the source DU to perceive, that is, the source DU needs to know configuration #A, and configuration #B does not require the source DU and CU to perceive.
  • configuration #A may include the measurement reference signal configuration (e.g., SSB configuration) of the candidate cell.
  • Configuration #B may include other configurations of the candidate cell except configuration #A, such as PDCCH configuration, etc.
  • the terminal may access the candidate cell according to configuration #B.
  • configuration #A may also include beam configuration (e.g., TCI configuration) and/or TA of the candidate cell.
  • beam configuration e.g., TCI configuration
  • configuration #A can be carried by a UE context establishment response (UE CONTEXT SETUP RESPONSE) message on the F1 interface or a UE context modification response (UE CONTEXT MODIFICATION RESPONSE) message on the F1 interface, for example, by adding a new field in the above message to carry the content of configuration #A.
  • UE CONTEXT SETUP RESPONSE UE context establishment response
  • UE CONTEXT MODIFICATION RESPONSE UE context modification response
  • configuration #B may also be carried by a UE context establishment response (UE CONTEXT SETUP RESPONSE) message on the F1 interface or a UE context modification response (UE CONTEXT MODIFICATION RESPONSE) message on the F1 interface, but configuration #B may be sent via the RRC Container of the above message, that is, it is used by the CU to subsequently generate an RRC configuration message and send it to the terminal device, and the CU does not need to perceive the content of configuration #B.
  • UE context establishment response UE CONTEXT SETUP RESPONSE
  • UE CONTEXT MODIFICATION RESPONSE UE context modification response
  • the source DU sends configuration information of the source cell to the CU.
  • the CU sends first configuration information to the source DU.
  • DU1 receives the first configuration information from the CU.
  • the CU determines whether to allow (or enable) to perform subsequent switching. If allowed, the CU can send the first configuration information to the source DU. Alternatively, if allowed, the CU further determines that at least one of the source cell and at least one candidate cell (i.e., all candidate cells) is allowed to be the target cell in the subsequent switching process, and then sends the first configuration information to the source DU.
  • At least one cell among the at least one candidate cell (ie, all candidate cells) that is allowed to be a target cell in a subsequent handover process is referred to as a subsequent handover accessible cell.
  • the first configuration information includes configuration information of the at least one candidate cell, and includes the first indication information and/or subsequent candidate cell information.
  • the subsequent candidate cell information indicates the accessible cell for subsequent switching, and the first indication information indicates that the subsequent switching can be performed. It should be understood that, assuming that the accessible cells for subsequent switching are cell X and cell Y, then, after the terminal switches from cell 0 to a candidate cell (for example, cell 1, cell 1 is different from cell X and cell Y), if cell X or cell Y meets the switching condition, the terminal can also switch from cell 1 to cell X or cell Y through subsequent switching. If the terminal switches from cell 1 to cell X through subsequent switching, if cell Y meets the switching condition, the terminal can also switch from cell X to cell Y through subsequent switching.
  • the first indication information may be explicit information. For example, if the CU determines to enable subsequent switching, a field (such as 1 bit) may be added to the configuration information of the candidate cell (specifically, the configuration #A of the candidate cell) to indicate that subsequent switching is allowed. For example, one of the above indication fields may be added to the configuration information of each candidate cell, or all candidate cells may share one indication field.
  • the first indication information is implicit information.
  • the subsequent candidate cell information may implicitly indicate the first indication information, that is, the subsequent candidate cell information has the function of the first indication information, and there is no need to represent the first indication information through additional bits.
  • a field (such as 1 bit) may be added to the configuration information of the candidate cell (specifically, the configuration #A of the candidate cell) to indicate that the candidate cell can be used as a cell accessible for subsequent handover.
  • a field such as 1 bit
  • an indication field may be added to the configuration information of each candidate cell that can be used as a cell accessible for subsequent handover;
  • all candidate cells may share one indication field, which is applicable to the scenario where all candidate cells can be used as cells accessible for subsequent handover.
  • a list of candidate cells that can be used as accessible cells for subsequent handover may also be provided, for example, the list may be ⁇ cell 2, cell 3 ⁇ .
  • configuration #A in the configuration information of the candidate cell needs to be perceived by the source DU
  • configuration #B in the configuration information of the candidate cell may not be perceived by the source DU
  • the first indication information and/or subsequent candidate cell information need to be perceived by the source DU
  • configuration #A, as well as the first indication information and/or subsequent candidate cell information can be explicitly transmitted over the F1 interface, and configuration #B can be sent by the CU to the source DU using the container transmission method, and then the source DU transmits the contents of the container to the terminal.
  • a field may be added to the configuration information of the candidate cell to indicate that subsequent handover is not allowed.
  • an indication field may be added to the configuration information of each candidate cell, or all candidate cells may share one indication field.
  • S504 The CU sends second configuration information to the candidate DU.
  • the CU may send second configuration information to each candidate CU.
  • the second configuration information may include the first indication information and/or the subsequent candidate cell information, and the configuration #A in the configuration information of each candidate cell.
  • the second configuration information may also include the first indication information and/or the configuration #B in the configuration information of each candidate cell.
  • the third configuration information sent by the source DU to the terminal in the subsequent step S505 may include the subsequent candidate cell information.
  • a candidate cell e.g., cell 1
  • it only performs cell measurement on the subsequent handover accessible cell, that is, the terminal believes that the terminal can only switch from cell 1 to a subsequent handover accessible cell.
  • the terminal switches from cell 1 to a subsequent handover accessible cell, it will also only perform cell measurement on the subsequent handover accessible cell.
  • the third configuration information sent by the source DU to the terminal in the subsequent step S505 may include the first indication information but does not include subsequent candidate cell information.
  • the terminal can always perform cell measurement on at least one candidate cell, but the candidate DU will only switch the terminal to a certain subsequent switching accessible cell through subsequent switching.
  • the execution order of S504 is not limited.
  • S504 can be executed before S503, can be executed after S503, or can be executed simultaneously with S503.
  • the CU may send the second configuration information to the target cell, that is, the current serving cell of the terminal. For example, after the terminal switches from cell 0 to cell 1 (corresponding to DU2), the CU may send the second configuration information to DU2. Subsequently, through subsequent switching, the terminal switches from cell 1 to cell 2 (corresponding to DU3), then the CU may send the second configuration information to DU3. If the terminal subsequently switches from cell 2 to cell 3 (corresponding to DU4) through subsequent switching, then the CU may send the second configuration information to DU4. It should be understood that both cell 2 and cell 3 are accessible cells for subsequent switching.
  • the candidate DU if the candidate DU does not receive the second configuration information, it is considered that the terminal is not allowed to perform subsequent handover.
  • the source DU sends third configuration information to the terminal.
  • the terminal receives the third configuration information from the source DU.
  • the third configuration information may include configuration information of at least one candidate cell, and include the first indication information and/or subsequent candidate cell information.
  • the third configuration information may be the same as or different from the first configuration information.
  • the method may further include one or more steps from S506 to S512.
  • S506 The terminal sends a first measurement report to the source DU.
  • the terminal can measure each candidate cell according to the configuration #A in the configuration information of each candidate cell, and report a measurement report (e.g., a first measurement report) to the source DU.
  • the first measurement report may include the measurement results (e.g., RSRP) of each candidate cell, and the identity of the candidate cell or the measurement reference signal identifier corresponding to the candidate cell.
  • the source DU sends a handover command (eg, a first handover command) according to the first measurement report, instructing the terminal to handover to the first target cell.
  • a handover command eg, a first handover command
  • the first switching command is an L1/L2 switching command.
  • the first handover command may include the identity of the first target cell and/or the TCI indication of the first target cell.
  • the first handover command may include the TCI of the first target cell.
  • the first target cell is cell 1 managed by DU 2. It should be understood that cell 1 is a candidate cell, or in other words, cell 1 belongs to the at least one candidate cell.
  • the first handover command may further include the TA of the first target cell.
  • the terminal may access the first target cell in a random access-free manner according to the TA of the first target cell.
  • S508 The terminal switches to the first target cell managed by DU2.
  • the method may further include:
  • S509 The terminal releases the configuration information of the candidate cell that is not allowed to be used as an accessible cell for subsequent handover.
  • the terminal can know whether subsequent switching can be performed after switching to the first target cell according to the first indication information and/or the subsequent candidate cell information. If it cannot be performed, the terminal can release the configuration information of other candidate cells; if the subsequent switching can be performed, and the terminal knows the accessible cell for the subsequent switching, the terminal can retain the configuration information of the accessible cell for the subsequent switching and release the subsequent Switch the configuration information of the inaccessible cell.
  • the terminal load can be reduced by releasing the configuration information of candidate cells that are not needed subsequently.
  • S510 The terminal sends a second measurement report to DU2.
  • the terminal After the terminal switches to the first target cell, that is, when the first target cell is the current serving cell of the terminal, the terminal can measure the subsequent switching accessible cell according to the configuration #A in the configuration information of the subsequent switching accessible cell, or the terminal can measure all candidate cells.
  • the terminal reports a measurement report (e.g., a second measurement report) to DU2.
  • the second measurement report may include the measurement results of the subsequent switching accessible cell (e.g., RSRP), and the identity of the subsequent switching accessible cell or the measurement reference signal identifier corresponding to the subsequent switching accessible cell.
  • the second measurement report may include the measurement results of all candidate cells (e.g., RSRP), and the identity of each candidate cell or the corresponding measurement reference signal identifier.
  • S511, DU2 sends a handover command (eg, a second handover command) according to the second measurement report, instructing the terminal to handover to the second target cell.
  • a handover command eg, a second handover command
  • the second switching command is an L1/L2 switching command.
  • DU2 can send a second switching command to the terminal based on the second measurement report reported by the terminal and determine that the second target cell meets the switching conditions, instructing the second terminal to switch to the second target cell.
  • the second target cell is cell 2 managed by DU 3. It should be understood that cell 2 is an accessible cell for subsequent handover.
  • the second handover command may further include the TA of the second target cell.
  • the terminal may access the second target cell in a random access-free manner according to the TA of the second target cell. In this way, the access delay may be reduced.
  • S512 The terminal switches to the second target cell managed by DU3 according to the second switching command.
  • DU3 may also switch the terminal to a subsequent switching accessible cell according to the measurement report of the terminal.
  • the CU can determine whether to allow subsequent switching, and determine the cell that allows subsequent switching if subsequent switching is allowed, and inform the terminal and the switching decision node DU of the necessary information related to the subsequent switching, so as to realize the subsequent switching under the CU-DU separation architecture.
  • the terminal can quickly complete the cell switching in the fast-moving scenario, thereby reducing the switching delay, and at the same time avoiding the frequent reconfiguration process of candidate cells, saving signaling overhead.
  • Fig. 6 is a schematic flow chart of another switching method provided by the present application.
  • the method 600 may include S601 to S605.
  • the method may also include one or more steps from S606 to S611. Each step is described below.
  • the CU sends a request message to a candidate DU, where the request message is used to request configuration information of the candidate cell.
  • Step S601 is substantially the same as S501 in method 500.
  • the definition of the candidate cell in method 600 is different from the definition of the candidate cell in method 500.
  • the candidate cell is defined as a cell that is allowed to be a target cell in the handover process
  • the measurement cell corresponding to the source cell i.e., cell 0
  • any candidate cell will be selected from the candidate cell and the source cell.
  • the measurement cell corresponding to the source cell refers to the cell that can be measured by the terminal when performing cell measurement (L1 measurement) when the source cell is the current serving cell of the terminal. It can be understood that if the terminal performs handover, it can only access a certain cell in the measurement cell corresponding to the source cell.
  • the measurement cell corresponding to the source cell can also be understood as a cell that is allowed to be a target cell in the handover process.
  • the measurement cell corresponding to any candidate cell refers to the cell that can be measured by the terminal when the candidate cell is the current serving cell of the terminal. It can be understood that when the candidate cell is used as the serving cell, if the terminal performs subsequent handover, it can only access a certain cell in the measurement cell corresponding to the candidate cell.
  • DU1 is the source DU
  • candidate DUs are DU2, DU3 and DU4.
  • cell 1 corresponding to DU2 cell 2 corresponding to DU3, and cells 3 and 4 corresponding to DU4 are all candidate cells.
  • DU1 may also serve as a candidate DU, and one or more cells other than cell 0 among the cells managed by DU1 may also serve as candidate cells.
  • the CU also requests configuration information of the source cell from the source DU.
  • the candidate DU sends configuration information of the candidate cell to the CU. Configuration information of the candidate cell corresponding to the DU.
  • Step S602 is the same as S502 in method 500, and details may be referred to S502.
  • the source DU also sends configuration information of the source cell to the CU.
  • S603 CU sends first configuration information to DU1.
  • the CU determines whether to allow (or enable) the terminal to perform subsequent switching. If allowed, the CU further determines the source cell and the measurement cell corresponding to each candidate cell, and then sends the first configuration information to DU1.
  • the first configuration information includes configuration information of at least one candidate cell and subsequent candidate cell information, and the subsequent candidate cell information indicates the source cell and the measurement cell corresponding to each candidate cell.
  • the first configuration information also includes configuration information of the source cell.
  • DU1 is the source DU
  • cell 1 corresponding to DU2 cell 2 corresponding to DU3
  • cell 3 and cell 4 corresponding to DU4 are all candidate cells.
  • the candidate cells are ⁇ cell 1, cell 2, cell 3, cell 4 ⁇ . It should be understood that in some possible cases, cell 0 can also be understood as a candidate cell.
  • the measurement cell corresponding to cell 0 is ⁇ cell 1 ⁇ ; the measurement cell corresponding to cell 1 is ⁇ cell 0, cell 2 ⁇ ; the measurement cell corresponding to cell 2 is ⁇ cell 1, cell 3 ⁇ ; the measurement cell corresponding to cell 3 is ⁇ cell 2, cell 4 ⁇ ; cell 4 has no corresponding measurement cell, that is, after the terminal switches to cell 4, no neighboring cell measurement is performed.
  • the terminal when the terminal's current serving cell is cell 0, the terminal can measure cell 1, so that the terminal has an opportunity to switch to cell 1; when the terminal's current serving cell is cell 1, for example, after the terminal switches from cell 0 to cell 1, the terminal can measure cell 0 and cell 2, so that the terminal has an opportunity to switch to cell 0 or cell 2 through subsequent switching.
  • the terminal's current serving cell is cell 2
  • the terminal can measure cell 1 and cell 3, so that the terminal has an opportunity to switch to cell 1 or cell 3 through subsequent switching;
  • the terminal's current serving cell is cell 3
  • the terminal can measure cell 2 and cell 4, so that the terminal has an opportunity to switch to cell 2 or cell 4 through subsequent switching.
  • the terminal's current serving cell is cell 4, for example, after the terminal switches from cell 3 to cell 4 through subsequent switching, the terminal will no longer perform candidate cell (neighboring cell) measurement.
  • the terminal when performing cell measurement, can measure the current serving cell in addition to the measurement cell corresponding to the current serving cell, and can also report the measurement result of the current serving cell to the DU corresponding to the current serving cell.
  • S604 The CU sends second configuration information to the candidate DU.
  • the second configuration information sent by the CU to each candidate DU is the same.
  • the second configuration information may include configuration #A in the configuration information of each candidate cell. If the measurement cell corresponding to the candidate cell corresponding to a candidate DU also includes a source cell (i.e., cell 0), the second configuration information also includes configuration #A in the candidate configuration information of the source cell.
  • the second configuration information sent by the CU to each candidate DU may be different. That is, the CU sends the second configuration information corresponding to the candidate DU to each candidate DU.
  • the second configuration information corresponding to any candidate DU may include the configuration #A in the configuration information of the measured cell corresponding to the candidate cell corresponding to the candidate DU.
  • the second configuration information corresponding to DU2 may include the configuration #A in the configuration information of cell 0 and cell 1.
  • the second configuration information corresponding to DU3 may include the configuration #A in the configuration information of cell 1 and cell 3.
  • the second configuration information corresponding to DU4 may include the configuration #A in the configuration information of cell 2 and cell 4.
  • the CU can execute S604 after determining the source cell and the measurement cells corresponding to each candidate cell, and before the terminal performs cell switching.
  • the execution order between S604 and S603 is not limited.
  • the CU can execute S604 after determining that subsequent switching is allowed and obtaining the configuration information of the candidate cell (and possibly the configuration information of the source cell), and before the terminal performs cell switching.
  • the CU can also execute after the terminal switches to the target cell through switching or through subsequent switching. For example, after the terminal switches from cell 0 to cell 1, the CU can send the second configuration information to DU2. After the terminal switches from cell 1 to cell 2, the CU can send the second configuration information to DU3.
  • the CU After the terminal switches from cell 2 to cell 3, the CU sends the second configuration information to DU4. After the terminal switches from cell 3 to cell 4, since cell 3 and cell 4 correspond to the same DU, and the CU has previously sent the second configuration information to DU4, the terminal can no longer send the second configuration information to DU4 repeatedly at this time.
  • the source DU sends third configuration information to the terminal.
  • the terminal receives the third configuration information from the source DU.
  • the third configuration information includes configuration information of at least one candidate cell and subsequent candidate cell information.
  • the third configuration information may also include configuration information of a source cell.
  • the third configuration information may be the same as the first configuration information.
  • the method may further include one or more steps from S606 to S611.
  • S606 The terminal sends a first measurement report to the source DU.
  • the terminal performs measurement reporting on the measurement cell corresponding to the source cell according to the configuration information of the measurement cell corresponding to the source cell. Specifically, the terminal may measure the measurement cell corresponding to the source cell according to the configuration #A in the configuration information of the measurement cell corresponding to the source cell, and report the measurement report (e.g., the first measurement report) to the DU.
  • the first measurement report may include the measurement results (e.g., RSRP) of each measurement cell corresponding to the source cell, and the identity of each measurement cell or the measurement reference signal identifier corresponding to each measurement cell.
  • the current serving cell of the terminal is cell 0.
  • the terminal will perform measurement reporting on cell 1 according to the configuration information of the measurement cell corresponding to cell 0, and also perform measurement reporting on the current cell.
  • the source DU sends a handover command (eg, a first handover command) according to the first measurement report, instructing the terminal to handover to the first target cell.
  • a handover command eg, a first handover command
  • the measurement results received by the source DU may include the measurement results of the serving cell (cell 0 in this case) and/or the measurement results of the measuring cell. If the measurement results only include the measurement results of the serving cell, the source DU does not instruct the terminal to switch to other cells; if the measurement results include the measurement results of the measuring cell, the source DU may issue an L1/L2 switching command to instruct the terminal to perform cell switching when the measurement results of the measuring cell indicate that the first target cell in the measuring cell signal quality is better.
  • the first target cell is cell 1 managed by DU2.
  • the first handover command may further include the TA of the first target cell.
  • the terminal may access the first target cell in a random access-free manner according to the TA of the first target cell. In this way, the access delay may be reduced.
  • the first switching command is an L1/L2 switching command.
  • S608 The terminal switches to the first target cell according to the first switching command.
  • the method may further include:
  • S609 The terminal sends a second measurement report to DU2.
  • the measurement cell corresponding to the first target cell can be measured according to the configuration #A in the configuration information of the measurement cell corresponding to the first target cell, and the measurement report (for example, the second measurement report) can be reported to DU2.
  • the second measurement report may include the measurement results (for example, RSRP) of each measurement cell corresponding to the first target cell, and the identity of each measurement cell or the measurement reference signal identifier corresponding to each measurement cell.
  • the measurement cells corresponding to the first target cell are cell 0 and cell 2.
  • the terminal will perform measurement reporting on cell 0 and cell 2, and also perform measurement reporting on the current cell.
  • S610: DU2 sends a handover command (eg, a second handover command) according to the second measurement report, instructing the terminal to handover to the second target cell.
  • a handover command eg, a second handover command
  • the second switching command is an L1/L2 switching command.
  • DU2 can determine whether to perform cell switching based on the second measurement report reported by the terminal.
  • the measurement results received by DU2 may include the measurement results of the serving cell (cell 1 in this case) and/or the measurement results of the measured cell. If the measurement results only include the measurement results of the serving cell, DU2 does not instruct the terminal to switch to other cells; if the measurement results include the measurement results of the measured cell, DU2 can issue an L1/L2 switching command to instruct the terminal to perform cell switching when the measurement results of the measured cell indicate that the signal quality of the second target cell in the measured cell is better.
  • the second target cell is cell 2 managed by DU3.
  • the second handover command may further include the TA of the second target cell.
  • the terminal may access the second target cell in a random access-free manner according to the TA of the second target cell.
  • S611 The terminal switches to a second target cell managed by DU3 according to a second switching command.
  • the terminal can measure the measurement cell corresponding to cell 2, and DU3 can switch the terminal to a measurement cell corresponding to cell 2, such as cell 3, according to the measurement report result of the terminal.
  • the terminal can measure the measurement cell corresponding to cell 3, and DU4 can switch the terminal to a measurement cell corresponding to cell 3, such as cell 4, according to the measurement report result of the terminal.
  • the access network device such as a CU in the access network device, can switch the terminal to another cell by other means (such as L3 switching).
  • the CU can determine whether subsequent switching is allowed, and if subsequent switching is allowed, determine each candidate cell and the cell corresponding to the source cell that is allowed to be accessed through switching or subsequent switching (i.e., the measurement cell), and then inform the terminal of the necessary information related to the switching and subsequent switching.
  • the terminal accordingly performs measurement reporting on the measurement cell corresponding to the current serving cell, and the switching decision node DU obtains the cell that can be accessed through switching or subsequent switching based on the received measurement report.
  • subsequent switching under the CU-DU separation architecture can be achieved.
  • the terminal can quickly complete cell switching in fast-moving scenarios, thereby reducing switching delays, while avoiding frequent candidate cell reconfiguration processes and saving signaling overhead.
  • configuration #C may include the measurement reference signal configuration of the candidate cell.
  • Configuration #D may include other configurations in the configuration information of the candidate cell except configuration #C.
  • the terminal has the configuration information of cell 0 and the configuration information of cell 1, and the current service cell of the terminal is cell 0.
  • the terminal When the terminal receives the switching command indicating the switch to cell 1, the terminal will apply the configuration information of cell 1. It should be understood that when the service cell of the terminal is cell 0, the terminal will measure the reference signals of cell 0 and cell 1. When the service cell of the terminal is switched to cell 1, the terminal will still measure the reference signals of cell 0 and cell 1. Therefore, for configuration #C, the terminal needs to use it before and after the cell switching, that is, the configuration #C of cell 0 and cell 1 is considered to be a common part, and there is no need to change the applied configuration as the terminal switches.
  • the terminal will replace the configuration information of the current service cell from configuration #D of cell 0 to configuration #D of cell 1. It should be understood that since configuration #C of cell 0 and cell 1 can be considered as a common part for the terminal, in S603, the CU can place configuration #C and configuration #D at different configuration levels.
  • the CU can obtain the configuration information of cell 0, cell 1, cell 2, cell 3 and cell 4.
  • the CU can place the configuration #C in the configuration information of cell 0, cell 1, cell 2, cell 3 and cell 4 on one level, and place the configuration #D in the configuration information of cell 0, cell 1, cell 2, cell 3 and cell 4 on another level.
  • configuration #C and configuration #A may be the same, and configuration #D and configuration #B may be the same.
  • Fig. 9 is a schematic flow chart of another switching method provided by the present application.
  • the method 900 may include one or more steps from S901 to S912. Each step is described below.
  • a CU sends request information to at least one DU.
  • the at least one DU receives the request information from the CU.
  • the CU may execute S901 if it is determined that subsequent switching is allowed (or enabled).
  • the request information is used to request configuration information of the candidate cell and information on whether the candidate cell is allowed to be used as a target cell in a handover process.
  • the information on whether the candidate cell is allowed to be used as a target cell in a handover process indicates whether the candidate cell is allowed to be used as a target cell in a handover process.
  • a cell that is allowed to be a target cell in a subsequent handover process is recorded as a subsequent handover accessible cell.
  • step S901 and S501 in method 500 The difference between step S901 and S501 in method 500 is that in S501, only the configuration information of the candidate cell is requested, while in S901, in addition to requesting the configuration information of the candidate cell, information is also requested as to whether each candidate cell corresponding to the candidate DU can be allowed to be an accessible cell for subsequent handover. If a candidate cell corresponding to a candidate DU is allowed to be an accessible cell for subsequent handover, then in the subsequent handover, the terminal can access the candidate cell.
  • the CU also sends a request message to the source DU requesting configuration information of the source cell and information on whether the source cell is allowed to be used as a target cell in the handover process.
  • the source cell is allowed to be the target cell in the handover process by default.
  • step S901 For the contents of step S901 that are the same as those of step S501 , reference may be made to step S501 .
  • the candidate DU sends the configuration information of the candidate cell and the information whether to allow the candidate cell to be used as the target cell in the switching process to the CU.
  • the CU receives the configuration information of the candidate cell corresponding to the candidate DU and the information whether to allow the candidate cell to be used as the target cell in the switching process from the candidate DU.
  • the candidate DU After receiving the request information from the CU, the candidate DU needs to determine whether each candidate cell corresponding to the candidate DU can be used as a cell accessible for subsequent switching. In addition, the candidate DU sends the determination result and the configuration information of the candidate cell to the CU.
  • the candidate CU determines that a corresponding candidate cell can be used as a subsequent handover accessible cell, and can A field (such as 1 bit) is added to the configuration information (specifically, it can be the configuration #A of the candidate cell) to indicate that the candidate cell can be used as an accessible cell for subsequent switching.
  • a field such as 1 bit
  • S903 The CU sends first configuration information to the source DU.
  • the CU can determine the accessible cells for subsequent handover among all candidate cells through the information sent by each candidate DU on whether to allow the candidate cell to be used as the target cell in the handover process. Subsequently, the CU can send the first configuration information to the source DU.
  • S904 to S912 are the same as S504 to S512, and reference may be made to S504 to S512.
  • the DU can judge whether certain candidate cells are suitable for providing subsequent switching access according to the actual situation of the candidate cells, and inform the CU of the situation, and the CU further informs the relevant DU and/or terminal, so as to realize the subsequent switching under the CU-DU separation architecture.
  • the cell switching can be completed quickly in the fast-moving scenario, the switching delay can be reduced, and the frequent candidate cell reconfiguration process can be avoided, saving signaling overhead.
  • the candidate DU may also notify the CU of this information. Subsequently, the CU may notify the current serving cell of the terminal of this information. In this way, the candidate cell providing subsequent switching access may be flexibly adjusted according to the network status, thereby improving the overall resource utilization. It should be understood that this embodiment may be combined with any of the aforementioned methods.
  • Fig. 10 is a schematic flow chart of a switching method provided by the present application.
  • the method 1000 may include one or more steps from S1001 to S1004.
  • DU#A sends update information #1 to CU.
  • CU receives update information #1 from DU#A.
  • DU#A is the DU corresponding to cell A, and cell A is a cell accessible for subsequent handover, or cell A is a measurement cell corresponding to cell B.
  • the current serving cell of the terminal is cell B, and cell B corresponds to DU#B.
  • DU#A determines that cell A is not suitable to continue to be an accessible cell for subsequent switching for a period of time, or DU#A determines that cell A is not suitable to continue to be an accessible cell for subsequent switching corresponding to cell B (i.e., the measurement cell corresponding to cell B) for a period of time, for example, when cell A is overloaded and a large number of users are connected, DU#A can send an indication message (for example, update information #1) to CU to indicate that cell A is not accessible through subsequent switching.
  • an indication message for example, update information #1
  • CU sends update information #2 to DU#B.
  • DU#B receives update information #2 from CU.
  • the CU After receiving the update information #1, the CU sends an indication message (eg, update information #2) to DU#B to inform DU#B that the cell A is not accessible through subsequent handover. In subsequent decisions, DU#B will not handover the terminal to the cell A through subsequent handover.
  • an indication message eg, update information #2
  • update information #1 and update information #2 may be the same.
  • the update information #1 or the update information #2 may be in any of the following forms:
  • a bitmap For example, there are four bits, each bit corresponding to an indication of whether a cell can be used as a cell accessible for subsequent handover, 0 indicates that it cannot be used as a cell accessible for subsequent handover, and 1 indicates that it can be used as a cell accessible for subsequent handover.
  • the first update message is 1010, it indicates that cell A, cell C, and cell D cannot be used as cells accessible for subsequent handover, and cell B cannot be used as a cell accessible for subsequent handover.
  • update information #1 or update information #2 may set the value of X1 in the criteria to infinity, i.e., the criteria for switching to cell A will not be met, i.e., the terminal will not be instructed to switch to cell A.
  • the method may further include:
  • DU#A sends update information #3 to CU.
  • CU receives update information #3 from DU#A.
  • DU#A can send an indication message (for example, update information #3) to CU to indicate that cell A can be accessed through subsequent switching.
  • indication message for example, update information #3
  • CU sends update information #4 to DU#B.
  • DU#B receives update information #4 from CU.
  • CU After receiving update information #3, CU sends an indication message (eg, update information #4) to DU#B to inform DU#B that cell A can be accessed through subsequent handover. In a subsequent decision, DU#B can handover the terminal to cell A through subsequent handover.
  • update information #4 an indication message
  • DU#B can handover the terminal to cell A through subsequent handover.
  • update information #3 and update information #4 may be the same.
  • update information #3 or update information #4 refer to the description of the specific form of update information #1 or update information #2.
  • the method may further include:
  • DU#B sends indication information to the terminal, where the indication information instructs the terminal to stop measuring and reporting cell A.
  • the method may further include:
  • DU#B sends indication information to the terminal, where the indication information instructs the terminal to resume measurement reporting on cell A.
  • the DU#A and DU#B described in the method 1000 may be any DU in any of the methods described above, and accordingly, the cell A and the cell B may be cells corresponding to the corresponding DUs.
  • DU#A may be DU1 in the method 500
  • DU#B may be DU2 in the method 500
  • the cell A may be cell 0 in the method 500
  • the cell B may be cell 1 in the method 500.
  • DU#A may be DU2 in the method 500
  • DU#B may be DU3 in the method 500
  • the cell A may be cell 1 in the method 500
  • the cell B may be cell 2 in the method 500.
  • DU#A may be DU1 in the method 600
  • DU#B may be DU2 in the method 600
  • the cell A may be cell 0 in the method 500
  • the cell B may be cell 1 in the method 500
  • DU#A may be DU2 in the method 600
  • DU#B may be DU3 in the method 600
  • the cell A may be cell 1 in the method 600
  • the cell B may be cell 2 in the method 600.
  • the CU may also provide a switching decision criterion to the source DU and/or any candidate DU. Specifically, the CU may send a switching decision criterion indication information to the source DU and/or any candidate DU, where the switching decision criterion indication information indicates the switching decision criterion.
  • the switching decision criterion can be included in the first configuration information or the second configuration information sent by the CU in any of the above-described methods.
  • the handover decision criterion may be a criterion shared by multiple candidate cells.
  • the handover decision criterion may be that when the signal quality of a candidate cell (or a beam of the candidate cell) is X dB higher than the signal quality of the current serving cell (or the beam currently used by the current serving cell), the DU determines that the terminal can be handed over to the candidate cell.
  • X may be any reasonable value.
  • the switching decision criterion can also be configured separately for each candidate cell.
  • the criterion for switching to cell 1 is that the signal quality of the cell level of cell 1 (or a certain beam of the candidate cell) is X1dB higher than the signal quality of the current serving cell (or the beam currently used by the current serving cell);
  • the criterion for switching to cell 2 is that the signal quality of the cell level of cell 2 (or a certain beam of the candidate cell) is X2dB higher than the signal quality of the current serving cell (or the beam currently used by the current serving cell); and so on, X1 and X2 can be configured to the same or different values, and the signal quality can be a measurement quantity such as RSRP that characterizes the channel condition.
  • the specific measurement quantity is not limited in this application.
  • the handover decision criteria may also consider the time when the measurement result reaches a specific threshold value.
  • the criterion for handover to cell 1 is that the signal quality of the cell level of cell 1 (or a beam of the candidate cell) is higher than the signal quality of the current serving cell (or the beam currently used by the current serving cell) by X1dB, and the higher time reaches T1 duration.
  • T1 can be any reasonable value.
  • the CU may also update the switching decision criterion according to the success or failure of the terminal switching, or the occurrence of a ping-pong effect, and provide the update criterion to the DU.
  • the CU may update the handover decision criterion for switching to cell 1, such as setting the value of X1 to be higher.
  • the switching decision criterion for switching to cell 1 is updated, for example, the value of the T1 duration is set to be larger.
  • the number of subsequent handovers allowed may be set and the number may be notified to the terminal.
  • the configuration information of other candidate cells except the current serving cell is released.
  • the preset number of times can also be set by protocol agreement. For example, the protocol agreement only allows two handovers (i.e., one handover (initial handover) and one subsequent handover). After the terminal completes these two handovers, the configuration information of other candidate cells except the current serving cell is released.
  • the access network device may also record the number of subsequent switching, for example, maintaining a counter, and the counter is incremented by 1 after each switching.
  • the counter may be maintained by the DU and is applicable to the intra-DU switching scenario; the counter may also be maintained by the CU and is applicable to the intra-DU or inter-DU switching scenario.
  • the CU counter reaches the preset value, the CU notifies the DU that is providing services for the terminal to stop the subsequent switching decision.
  • the number of times can be carried by the first configuration information.
  • the terminal may maintain a timer, which is started after receiving the configuration information of the candidate cell or after performing the first handover. Before the timer expires, the terminal can perform subsequent handovers; after the timer expires, the terminal cannot perform subsequent handovers and releases the configuration information of other candidate cells except the current serving cell.
  • the terminal may restart the timer after each subsequent handover.
  • the access network device e.g., CU
  • the terminal may restart the timer.
  • the terminal may maintain a common timer for all candidate cells, or a timer for each candidate cell, for example, the terminal maintains Timer0 for cell 0, Timer1 for cell 1, and Timer2 for cell 2.
  • Timer1 may be started or restarted.
  • Timer1 expires, the terminal may release the cell configuration of cell 1, and consider that it cannot be switched to cell 1 through subsequent switching. The operations for other cells may be deduced in the same way.
  • the access network device can also maintain a timer accordingly, which can be a common timer for all candidate cells of a certain terminal, or a separate timer for each candidate cell.
  • a timer can be maintained by the DU and is applicable to intra-DU switching scenarios; the timer can also be maintained by the CU and is applicable to intra-DU or inter-DU switching scenarios.
  • the CU's timer expires, the CU notifies the DU that is providing services to the terminal to stop the subsequent switching decision.
  • FIG 11 is a schematic block diagram of a communication device provided in an embodiment of the present application.
  • the communication device 2000 may include a communication unit 2100.
  • it may also include a processing unit 2200.
  • the communication unit 2100 may implement corresponding communication functions, and the communication may be internal communication of the communication device 2000 or communication between the communication device 2000 and other devices, such as obtaining configuration information of a candidate cell; the processing unit 2200 may implement corresponding processing functions, such as determining at least one cell that is allowed to be a target cell in a subsequent switching process.
  • the communication unit 2100 may also be referred to as a communication interface or a communication unit.
  • the communication device 2000 may also include a storage unit, which may be used to store instructions and/or data, and the processing unit 2200 may read instructions and/or data in the storage unit so that the device implements the aforementioned method embodiment.
  • the communication device 2000 may be the first network device (e.g., CU) in any of the above method embodiments, or may be a module or chip applied to the first network device.
  • the communication device 2000 may be used to execute the steps or processes executed by the first network device in any of the above method embodiments.
  • the communication unit 2100 is used to: obtain configuration information of at least one candidate cell, and some or all of the at least one candidate cell are allowed to be target cells in a switching process; send first configuration information to a second network device, the first configuration information including the configuration information of the at least one candidate cell, and first indication information and/or subsequent candidate cell information, the subsequent candidate cell information indicates at least one cell that is allowed to be a target cell in a subsequent switching process, the first indication information indicates that subsequent switching can be performed, the second network device is a network device corresponding to the first cell, and the first cell is the current serving cell of the terminal.
  • the switching is L1/L2 switching
  • the subsequent switching is subsequent L1/L2 switching.
  • the at least one cell allowed to be the target cell in the subsequent handover process includes part or all of the at least one candidate cell, or the at least one cell allowed to be the target cell in the subsequent handover process includes all part or all of the at least one candidate cell and the first cell; and the communication unit 2100 is also used to: send second configuration information to at least one network device corresponding to the at least one candidate cell, respectively, the second configuration information including the first indication information and/or the subsequent candidate cell information, and the measurement reference signal configuration of the at least one candidate cell in the configuration information of the at least one candidate cell.
  • the communication unit 2100 is also used to receive reporting information from the network devices corresponding to at least one candidate cell, and the reporting information of the network devices corresponding to any candidate cell indicates the cells managed by the network device that are allowed to be the target cells in the subsequent switching process; the processing unit 2200 is used to determine the subsequent candidate cell information based on the reporting information.
  • the subsequent candidate cell information indicates the measurement cells corresponding to the first cell and the at least one candidate cell, respectively, the measurement cell corresponding to any candidate cell is a cell allowed to perform cell measurement when the candidate cell is a serving cell, and the measurement cell corresponding to the first cell is a cell allowed to perform cell measurement when the first cell is a serving cell.
  • the measurement cell corresponding to the third cell includes the second cell; after switching from the first cell to the second cell and from the second cell to the third cell, the communication unit 2100 is also used to: receive update information from a network device corresponding to the second cell, the update information indicating that the second cell cannot continue to serve as the measurement cell corresponding to the third cell; and send the update information to the network device corresponding to the third cell.
  • the communication unit 2100 is also used to send switching decision criterion indication information to the communication device 2000 and at least one network device corresponding to the at least one candidate cell, and the switching decision criterion is used by the communication device 2000 and the at least one network device corresponding to the at least one candidate cell to determine whether to perform switching or subsequent switching when they serve as the network device corresponding to the service cell of the terminal.
  • the first configuration information also includes a timing advance TA corresponding to each of the at least one candidate cell; and the communication unit 2100 is further used to obtain the TA corresponding to the at least one candidate cell from at least one network device corresponding to the at least one candidate cell.
  • TA timing advance
  • the communication device 2000 is a centralized unit CU, and the second network device is a distributed unit DU corresponding to the first cell.
  • the communication device 2000 may be the second network device (e.g., source DU) in any of the above method embodiments, or may be a module or chip applied to the second network device.
  • the communication device 2000 may be used to execute the steps or processes executed by the second network device in any of the above method embodiments.
  • the communication device 2000 is a network device corresponding to the first cell, and the first cell is the current serving cell of the terminal.
  • the communication unit 2100 is used to: receive first configuration information from a first network device; and send third configuration information to the terminal according to the first configuration information, wherein the third configuration information includes first indication information and/or subsequent candidate cell information, wherein the subsequent candidate cell information indicates at least one cell that is allowed to be a target cell in a subsequent switching process, and the first indication information indicates that a subsequent switching can be performed.
  • the first configuration information includes the first indication information and/or the subsequent candidate cell information.
  • the subsequent candidate cell information indicates at least one candidate cell and at least one of the first cells that is allowed to be a target cell in a subsequent switching process, and the candidate cell is allowed to be a target cell in the switching process; or, the subsequent candidate cell information indicates the measurement cells corresponding to the at least one candidate cell and the first cell, respectively, the measurement cell corresponding to any candidate cell is a cell that is allowed to perform cell measurement when the candidate cell is a serving cell, and the measurement cell corresponding to the first cell is a cell that is allowed to perform cell measurement when the first cell is a serving cell.
  • the communication device 2000 may be a third network device (e.g., DU2) in any of the above method embodiments, or may be a module or chip applied to a third network device.
  • the communication device 2000 may be used to execute the steps or processes executed by the third network device in any of the above method embodiments.
  • the communication device 2000 may correspond to DU2 in the method 500 or the method 900 described above.
  • the communication unit 2100 is used to: receive second configuration information from the first network device, the second configuration information includes subsequent candidate cell information, the subsequent candidate cell information indicates at least one candidate cell and at least one of the first cells that is allowed to be used as a target cell in a subsequent switching process, the first cell is the current serving cell of the terminal, and the candidate cell is allowed to be used as a target cell in the switching process; after switching from the first cell to the second cell of the communication device 2000, Receive a measurement report from the terminal, where the second cell belongs to the at least one candidate cell; and send a switching command to the terminal according to the measurement report and the second configuration information, where the switching command indicates switching from the second cell to a third cell, where the third cell belongs to the cell allowed to be the target cell in a subsequent switching process.
  • the second configuration information includes a reference signal measurement configuration of the at least one candidate cell or a reference signal measurement configuration of the at least one cell allowed to be a target cell in a subsequent handover process.
  • the second configuration information also includes a timing advance TA of the at least one candidate cell.
  • the handover command includes the TA of the third cell, and the handover command is further used to instruct access to the third cell in a random access-free manner.
  • the communication unit 2100 is further used to: receive switching decision criterion indication information from the first network device; and send the switching command to the terminal according to the measurement report, the second configuration information, and the switching decision criterion indicated by the switching decision criterion indication information.
  • the second cell belongs to the cell that is allowed to be the target cell in a subsequent switching process; after the terminal switches to the third cell, the communication unit 2100 is also used to receive update information from the first network device, and the update information indicates that the second cell cannot continue to be the cell that is allowed to be the target cell in a subsequent switching process; the processing unit 2200 is used to determine, based on the update information, not to switch the terminal to the second cell in a subsequent switching.
  • the communication device 2000 may correspond to DU2 in the above method 600 .
  • the communication unit 2100 is used to: after the terminal switches from the first cell to the second cell of the communication device 2000, receive a measurement report from the terminal, the second cell belongs to at least one candidate cell, and the candidate cell is allowed to be a target cell in the switching process, and the measurement report includes the measurement result of the measurement cell corresponding to the second cell, and the measurement cell corresponding to the second cell is a cell that is allowed to perform cell measurement when the second cell is a serving cell; according to the measurement report, send a switching command to the terminal, and the switching command instructs the terminal to switch from the second cell to the third cell, and the third cell belongs to the measurement cell corresponding to the second cell.
  • the communication unit 2100 is further used to: receive a timing advance TA of the third cell from the first network device.
  • the handover command includes the TA of the third cell, and the handover command is further used to instruct the terminal to access the third cell in a random access-free manner.
  • the communication unit 2100 is further used to: receive switching decision criterion indication information from the first network device; and send the switching command to the terminal according to the measurement report and the switching decision criterion indicated by the switching decision criterion indication information.
  • the second cell belongs to the measurement cell corresponding to the third cell; after the terminal switches to the third cell, the communication unit 2100 is also used to receive update information from the first network device, and the update information indicates that the second cell can no longer continue to serve as the measurement cell corresponding to the third cell; the processing unit 2200 is used to determine, based on the update information, not to switch the terminal to the second cell in a subsequent switch.
  • the communication device 2000 may be a terminal in any of the above method embodiments, or a module or chip applied to a terminal.
  • the communication device 2000 may be used to execute the steps or processes executed by the terminal in any of the above method embodiments.
  • the communication unit 2100 is used to receive third configuration information from a second network device, where the second network device is a network device corresponding to a first cell, and the first cell is the current service cell of the communication device 2000.
  • the third configuration information includes first indication information and/or subsequent candidate cell information, and the subsequent candidate cell information indicates at least one cell that is allowed to be used as a target cell in a subsequent switching process, and the first indication information indicates that subsequent switching can be performed; the processing unit 2200 is used to perform subsequent switching according to the third configuration information after switching from the first cell to the target cell.
  • the subsequent candidate cell information indicates at least one candidate cell and at least one of the first cells that is allowed to be a target cell in a subsequent switching process, and the candidate cell is allowed to be a target cell in the switching process; or, the subsequent candidate cell information indicates the measurement cells corresponding to the at least one candidate cell and the first cell, respectively, the measurement cell corresponding to any candidate cell is a cell that is allowed to perform cell measurement when the candidate cell is a serving cell, and the measurement cell corresponding to the first cell is a cell that is allowed to perform cell measurement when the first cell is a serving cell.
  • the processing unit 2200 is further configured to: release the configuration information of the at least one candidate cell and the cell in the first cell that is not allowed to be the target cell in the subsequent switching process; or release Configuration information of at least one non-measurement cell, wherein the measurement cells corresponding to the at least one candidate cell and the first cell respectively do not include the at least one non-measurement cell.
  • the communication unit 2100 is also used to send a measurement report to a third network device, where the third network device is a network device corresponding to the second cell, and the measurement report includes a measurement result of the measurement cell corresponding to the second cell, or the measurement report includes a measurement result of the at least one candidate cell; receive a switching command from the third network device, and the switching command is generated based on the measurement report; the processing unit 2200 is also used to switch from the second cell to a third cell according to the switching command, and the third cell belongs to the measurement cell corresponding to the second cell, or the third cell belongs to the cell allowed to be the target cell in a subsequent switching process.
  • the third network device is a network device corresponding to the second cell
  • the measurement report includes a measurement result of the measurement cell corresponding to the second cell, or the measurement report includes a measurement result of the at least one candidate cell
  • receive a switching command from the third network device and the switching command is generated based on the measurement report
  • the processing unit 2200 is also used to switch from the second
  • the communication device 2000 may also be DU3 or DU4 in any of the above method embodiments, or may be a module or chip applied to DU3 or DU4.
  • the communication device 2000 may be used to execute the steps or processes executed by DU3 or DU4 in any of the above method embodiments.
  • the "unit" in the communication device 2000 can be implemented by hardware, can be implemented by software, and can also be implemented by hardware to execute the corresponding software.
  • the "unit” can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combined logic circuit and/or other suitable components that support the described functions.
  • the communication unit 2100 can be replaced by a transceiver transceiver circuit (for example, it can include a receiving circuit and a transmitting circuit), and the processing unit 2200 can be replaced by a processor or a processing circuit.
  • FIG12 shows a schematic block diagram of another communication device 3000 provided in an embodiment of the present application.
  • the communication device 3000 may be a first network device (e.g., CU), a second network device (e.g., DU1), a third network device (e.g., DU2), or a network device such as DU3 or DU4, or may be a chip, a chip system, or a processor that supports the first network device (e.g., CU), a second network device (e.g., DU1), a third network device (e.g., DU2), or a network device such as DU3 or DU4 to implement the above method.
  • the device may be used to implement the method described in the above method embodiment, and specific reference may be made to the description in the above method embodiment.
  • the communication device 3000 may include one or more processors 3100, which may also be referred to as a processing unit, and may implement certain control functions.
  • the processor 3100 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit.
  • the baseband processor may be used to process the communication protocol and the communication data
  • the central processing unit may be used to control the communication device (e.g., a base station, a baseband chip, a user chip, a DU or a CU, etc.), execute a software program, and process the data of the software program.
  • the processor 3100 may also store instructions and/or data, which can be executed by the processor 3100 so that the communication device 3000 executes the method described in the above method embodiment.
  • the communication device 3000 may include a transceiver 3200 for implementing the receiving and sending functions.
  • the transceiver 3200 may be a transceiver circuit, or an interface, or an interface circuit.
  • the transceiver circuit, interface, or interface circuit for implementing the receiving and sending functions may be separate or integrated.
  • the above-mentioned transceiver circuit, interface, or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface, or interface circuit may be used for transmitting or delivering signals.
  • the communication device 3000 may include a circuit that can implement the functions of sending, receiving or communicating in the aforementioned method embodiments.
  • the communication device 3000 may include one or more memories 3300, on which instructions may be stored, and the instructions may be executed on the processor 3100, so that the communication device 3000 performs the method described in the above method embodiment.
  • data may also be stored in the memory 3300.
  • instructions and/or data may also be stored in the processor 3100.
  • the processor 3100 and the memory 3300 may be provided separately or integrated together.
  • FIG13 is a schematic diagram of the structure of a terminal 4000 provided by the present application.
  • the above-mentioned communication device 2000 or communication device 3000 can be configured in the terminal 4000.
  • the communication device 2000 or communication device 3000 itself can be the terminal 4000.
  • the terminal 4000 can perform the actions performed by the terminal in the above-mentioned method embodiment.
  • FIG13 only shows the main components of the terminal.
  • the terminal 4000 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire terminal, execute the software program, and process the data of the software program, for example, to support the terminal to perform the actions described in the above method embodiment.
  • the control circuit is mainly used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals.
  • the control circuit and antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the RF circuit.
  • the RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna.
  • the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor.
  • the processor converts the baseband signal into data and processes the data.
  • FIG. 13 shows only one memory and processor. In an actual terminal, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiments of the present application.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process the communication protocol and communication data
  • the central processing unit is mainly used to control the entire terminal, execute the software program, and process the data of the software program.
  • the processor in Figure 13 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors, interconnected by technologies such as buses.
  • the terminal may include multiple baseband processors to adapt to different network formats, and the terminal may include multiple central processing units to enhance its processing capabilities.
  • the various components of the terminal may be connected through various buses.
  • the baseband processor may also be described as a baseband processing circuit or a baseband processing chip.
  • the central processing unit may also be described as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data may be built into the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.
  • the antenna and the control circuit having the transceiver function may be regarded as the transceiver unit 4100 of the terminal 4000, and the processor having the processing function may be regarded as the processing unit 4200 of the terminal 4000.
  • the terminal 4000 includes a transceiver unit 4100 and a processing unit 4200.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, etc.
  • the device for realizing the receiving function in the transceiver unit 4100 may be regarded as a receiving unit, and the device for realizing the sending function in the transceiver unit 4100 may be regarded as a sending unit, that is, the transceiver unit 4100 includes a receiving unit and a sending unit.
  • the receiving unit may also be referred to as a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be referred to as a transmitter, a transmitter, or a sending circuit, etc.
  • FIG14 is a schematic diagram of the structure of an access network device 5000 provided in an embodiment of the present application.
  • the above-mentioned communication device 2000 or communication device 3000 can be configured in the access network device 5000.
  • the communication device 2000 or communication device 3000 itself can be the access network device 5000.
  • the access network device 5000 can perform the actions performed by the network device (e.g., the first network device) in the above-mentioned method embodiment.
  • the access network device 5000 may include one or more DU 5010 and one or more CU 5020.
  • CU 5020 may communicate with NG core (Next Generation Core Network, NC).
  • the DU 5010 may include at least one antenna 5011, at least one radio frequency unit 5012, at least one processor 5013 and at least one memory 5014.
  • the DU 5010 part is mainly used for receiving and transmitting radio frequency signals, converting radio frequency signals to baseband signals, and part of baseband processing.
  • CU 5020 may include at least one processor 5022 and at least one memory 5021.
  • CU 5020 and DU 5010 may communicate through an interface, wherein the control plane (CP) interface may be Fs-C, such as F1-C, and the user plane (UP) interface may be Fs-U, such as F1-U.
  • CP control plane
  • UP user plane
  • the CU 5020 part is mainly used for baseband processing, controlling the access network device 5000, etc.
  • the DU 5010 and CU 5020 can be physically set together or physically separated, that is, a distributed base station.
  • the CU 5020 is the control center of the access network device 5000, which can also be called a processing unit, and is mainly used to complete the baseband processing function.
  • the CU 5020 can be used to control the access network device 5000 to execute the operation process of the network device in the above method embodiment.
  • the baseband processing on the CU and DU can be divided according to the protocol layer of the wireless network, for example, the functions of the PDCP layer and above protocol layers are set in the CU, and the functions of the protocol layers below the PDCP, such as the RLC layer and the MAC layer, are set in the DU.
  • the CU implements the functions of the RRC layer and the PDCP layer
  • the DU implements the functions of the RLC layer, the MAC layer, and the PHY layer.
  • the access network device 5000 may optionally include one or more radio frequency units (RUs), one or more DUs, and one or more CUs.
  • the DU may include at least one processor 5013 and at least one memory 5014
  • the RU may include at least one antenna 5011 and at least one radio frequency unit 5012
  • the CU may include at least one processor 5022 and at least one memory 5014.
  • the CU 5020 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network with a single access standard (such as a 5G network), or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks).
  • the memory 5021 and the processor 5022 may serve one or more boards. In other words, a memory and a processor may be separately set on each board. It is also possible that multiple boards share the same memory and processor. In addition, necessary circuits may be set on each board.
  • the DU 5010 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network with a single access indication (such as a 5G network), or may respectively support wireless access networks with different access standards (such as an LTE network, a 5G network, or other networks).
  • the memory 5014 and the processor 5013 may serve one or more boards. In other words, a memory and a processor may be separately set on each board. It is also possible that multiple boards share the same memory and processor. In addition, necessary circuits may be set on each board.
  • the access network device 5000 shown in FIG14 can implement various processes involving network devices (e.g., first network devices) in the above method embodiments.
  • the operations and/or functions of various modules in the access network device 5000 are respectively to implement the corresponding processes in the above method embodiments.
  • the detailed description is appropriately omitted here.
  • the access network device 5000 shown in FIG. 14 is only a possible architecture of a network device and should not constitute any limitation to the present application.
  • the method provided in the present application can be applied to network devices of other architectures.
  • network devices including CU, DU and AAU, etc.
  • the present application does not limit the specific architecture of the access network device.
  • each step in the method embodiment provided by the present application can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.
  • the steps of the method disclosed in conjunction with the embodiment of the present application can be directly embodied as a hardware processor executing, or a combination of hardware and software modules in a processor executing.
  • the software module can be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it is not described in detail here.
  • the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities.
  • each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software.
  • the above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field programmable gate array
  • the methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.
  • the steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined and performed.
  • the software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc.
  • the storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories.
  • the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory.
  • the volatile memory can be a random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static RAM
  • DRAM dynamic RAM
  • SDRAM synchronous DRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced SDRAM
  • SLDRAM synchlink DRAM
  • DR RAM direct rambus RAM
  • the present application also provides a computer program product, which includes: a computer program code, when the computer program code is executed on a computer, the computer executes the first network device (for example, CU), the second network device (for example, DU1), the third network device (for example, DU2), or the network device such as DU3 or DU4 in any of the above method embodiments.
  • a computer program product which includes: a computer program code, when the computer program code is executed on a computer, the computer executes the first network device (for example, CU), the second network device (for example, DU1), the third network device (for example, DU2), or the network device such as DU3 or DU4 in any of the above method embodiments.
  • the present application also provides a computer-readable storage medium, which stores a program code.
  • the program code runs on a computer, the computer executes the steps or processes performed by the first network device (e.g., CU), the second network device (e.g., DU1), the third network device (e.g., DU2), or a network device such as DU3 or DU4 in any of the above method embodiments.
  • the first network device e.g., CU
  • the second network device e.g., DU1
  • the third network device e.g., DU2
  • a network device such as DU3 or DU4 in any of the above method embodiments.
  • the present application also provides a communication system, which includes one or more of the following: a first network device (eg, CU), a second network device (eg, DU1), a third network device (eg, DU2), or a network device such as DU3/DU4.
  • a first network device eg, CU
  • a second network device eg, DU1
  • a third network device eg, DU2
  • a network device such as DU3/DU4.
  • the transceiver unit or transceiver executes the receiving or sending steps in the method embodiment, and the other steps except sending and receiving can be executed by the processing unit or processor.
  • a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program and/or a computer.
  • applications running on a computing device and a computing device can be components.
  • One or more components may reside in a process and/or an execution thread, and a component may be located on a computer and/or distributed between two or more computers.
  • these components may be executed from various computer-readable storage media having various data structures stored thereon.
  • Components may, for example, communicate through local and/or remote processes according to signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and/or a network, such as the Internet interacting with other systems through signals).
  • signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and/or a network, such as the Internet interacting with other systems through signals).
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • each functional unit can be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more available media.
  • the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD)).
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art.
  • the computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

Landscapes

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

Abstract

L'invention concerne un procédé de transfert et un appareil de communication, se rapportant au domaine des communications. Dans le procédé, une CU peut déterminer si un transfert ultérieur est autorisé, et lorsque le transfert ultérieur est autorisé, déterminer une cellule accessible de transfert ultérieure, et fournir à un terminal et/ou à une DU correspondante les informations et les informations de configuration de cellule nécessaires ; le terminal et la DU correspondante peuvent exécuter le transfert ultérieur en fonction des informations fournies par la CU ; et le transfert ultérieur permet au terminal et à la DU de ne pas libérer une configuration de cellule correspondante après que le transfert a été exécuté une fois, mais exécuter un ou plusieurs transferts selon la configuration. La solution peut permettre d'obtenir des transferts ultérieurs, ce qui permet de réduire le retard de transfert, d'éviter le processus de reconfiguration de cellule candidate fréquente et d'économiser des surdébits de signalisation.
PCT/CN2023/120864 2022-09-30 2023-09-22 Procédé de transfert et appareil de communication WO2024067422A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211225303.4 2022-09-30
CN202211225303.4A CN117812650A (zh) 2022-09-30 2022-09-30 切换方法和通信装置

Publications (1)

Publication Number Publication Date
WO2024067422A1 true WO2024067422A1 (fr) 2024-04-04

Family

ID=90427562

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/120864 WO2024067422A1 (fr) 2022-09-30 2023-09-22 Procédé de transfert et appareil de communication

Country Status (2)

Country Link
CN (1) CN117812650A (fr)
WO (1) WO2024067422A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112042221A (zh) * 2018-03-05 2020-12-04 诺基亚技术有限公司 用于支持和进行切换的通信连接控制过程
CN113271633A (zh) * 2020-02-14 2021-08-17 华为技术有限公司 切换的方法和通信装置
CN114079986A (zh) * 2020-08-18 2022-02-22 华为技术有限公司 一种移动性管理方法和装置
WO2022130273A1 (fr) * 2020-12-16 2022-06-23 Telefonaktiebolaget Lm Ericsson (Publ) Procédure de mobilité pour multi-sim

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112042221A (zh) * 2018-03-05 2020-12-04 诺基亚技术有限公司 用于支持和进行切换的通信连接控制过程
CN113271633A (zh) * 2020-02-14 2021-08-17 华为技术有限公司 切换的方法和通信装置
CN114079986A (zh) * 2020-08-18 2022-02-22 华为技术有限公司 一种移动性管理方法和装置
WO2022130273A1 (fr) * 2020-12-16 2022-06-23 Telefonaktiebolaget Lm Ericsson (Publ) Procédure de mobilité pour multi-sim

Also Published As

Publication number Publication date
CN117812650A (zh) 2024-04-02

Similar Documents

Publication Publication Date Title
JP2021522750A (ja) 通信方法及び通信装置
KR102276720B1 (ko) 핸드오버 방법, 단말 디바이스 및 네트워크 디바이스
JP7179062B2 (ja) ハンドオーバー方法、端末およびネットワーク側装置
WO2020135850A1 (fr) Procédé et appareil de communication
WO2020221223A1 (fr) Procédé, appareil et système de communication
TWI802945B (zh) 通訊方法、裝置及系統
WO2020015545A1 (fr) Procédé de récupération de défaillance de faisceau, dispositif terminal et dispositif côté réseau
US20200022195A1 (en) Association Management Method And Network Node
WO2019214732A1 (fr) Appareil et procédé de communication
EP4221308A1 (fr) Procédé et appareil de communication, ainsi que support de stockage lisible et système
WO2021027896A1 (fr) Procédé de communication et appareil de communication
CN112788542A (zh) 通信方法、设备及系统
EP3852481A1 (fr) Procédé de commutation de mode et procédé et appareil de distribution de flux de données
WO2021204022A1 (fr) Procédé et appareil de mesure
WO2024067422A1 (fr) Procédé de transfert et appareil de communication
WO2022188437A1 (fr) Procédé et appareil de traitement d'informations, et support de stockage
WO2021088642A1 (fr) Procédé de changement de nœud secondaire, nœud maître, deuxième nœud, et terminal
WO2021027900A1 (fr) Procédé de communication, terminal et dispositif réseau
WO2019228459A1 (fr) Appareil et procédé de communication, et support d'informations
CN115623451A (zh) 条件切换方法和设备
CN109845363B (zh) 一种路径转换方法及相关设备
WO2024067552A1 (fr) Procédé, appareil et système de communication
WO2024093933A1 (fr) Procédé de transmission de données et appareil de communication
WO2023221838A1 (fr) Procédé d'interaction et dispositif associé
WO2023226883A1 (fr) Procédé et appareil de rapport pour rapport de mesure, et terminal et dispositif côté réseau

Legal Events

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

Ref document number: 23870653

Country of ref document: EP

Kind code of ref document: A1