WO2023207883A1 - 服务小区改变方法、基站的集中/分布单元及通信*** - Google Patents

服务小区改变方法、基站的集中/分布单元及通信*** Download PDF

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Publication number
WO2023207883A1
WO2023207883A1 PCT/CN2023/090221 CN2023090221W WO2023207883A1 WO 2023207883 A1 WO2023207883 A1 WO 2023207883A1 CN 2023090221 W CN2023090221 W CN 2023090221W WO 2023207883 A1 WO2023207883 A1 WO 2023207883A1
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Prior art keywords
base station
information
user equipment
distribution unit
candidate target
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PCT/CN2023/090221
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English (en)
French (fr)
Inventor
刘胜楠
蒋峥
佘小明
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中国电信股份有限公司
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Publication of WO2023207883A1 publication Critical patent/WO2023207883A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release

Definitions

  • the present disclosure relates to the field of wireless communications, and in particular to a method for changing a serving cell, a centralized/distributed unit of a base station, and a communication system.
  • NR New Radio
  • LTE Long Term Evolution, Long Term Evolution
  • NR New Radio
  • L3 Layer 3
  • RRC Radio Resource Control
  • Some embodiments of the present disclosure provide a serving cell changing method, including:
  • the centralized unit of the base station determines the candidate target cell of the current user equipment, and sends a user equipment context establishment request message to the candidate target distribution unit corresponding to the candidate target cell of the current user equipment, which includes one or more of the following information: used to indicate The user equipment context establishment request message is indication information for initiating the serving cell change process based on the first layer information or the second layer information, and the requested candidate target cell information;
  • the centralized unit of the base station receives the user equipment context establishment response message sent by the candidate target distribution unit, which carries the candidate target cell information that accepts the request;
  • the centralized unit of the base station sends a downlink radio resource control message change message to the source distribution unit of the base station, which carries mobility-related configuration information, so that the source distribution unit of the base station triggers the serving cell change process of the user equipment.
  • the mobility-related configuration information sent by the centralized unit of the base station to the source distribution unit of the base station includes one or more of the following:
  • the candidate target cell information includes a cell index or cell identification of the candidate target cell.
  • the method further includes: the centralized unit of the base station receives an access success message sent by the target distribution unit of the base station, for indicating that the user equipment successfully accesses the target cell under the target distribution unit of the base station.
  • the method further includes: the source distribution unit of the base station sending the first layer measurement configuration for the candidate target cell to the user equipment, and receiving the measurement report for the candidate target cell sent by the user equipment.
  • the method further includes: the source distribution unit of the base station sends the second layer indication information to the user equipment according to the measurement report of the candidate target cell and the information triggering the change of the serving cell, which carries the second layer indication information under the target distribution unit of the base station.
  • Target cell information indicates the target cell under the target distribution unit where the user equipment accesses the base station.
  • the second layer indication information includes an updated transmission configuration indication, which carries target cell information under the target distribution unit of the base station.
  • the target cell information includes a cell index or cell identification of the target cell.
  • the first layer is a physical layer; the second layer is a media access control layer.
  • Some embodiments of the present disclosure provide a serving cell changing method, including:
  • the source distribution unit of the base station receives the mobility-related configuration information sent by the centralized unit of the base station, which includes one or more of the following: candidate target cell information under the candidate target distribution unit, information that triggers the change of the serving cell;
  • the source distribution unit of the base station sends the first layer measurement configuration for the candidate target cell to the current user equipment, and receives the measurement report for the candidate target cell sent by the user equipment;
  • the source distribution unit of the base station sends the second layer indication information to the user equipment based on the measurement report of the candidate target cell and the information that triggers the change of the serving cell, which carries the target cell information under the target distribution unit of the base station, instructing the user equipment to access The target cell under the target distribution unit of the base station.
  • Some embodiments of the present disclosure provide a serving cell changing method, including:
  • the candidate target distribution unit corresponding to the candidate target cell of the current user equipment receives the user equipment context establishment request message sent by the centralized unit of the base station, which includes one or more of the following information: used to indicate the user equipment context establishment request message It is the indication information for initiating the serving cell change process based on the first layer information or the second layer information, and the requested candidate target cell information;
  • the candidate target distribution unit sends a user equipment context establishment response message to the centralized unit of the base station, which carries the candidate target cell information that accepts the request, so that the centralized unit of the base station sends mobility-related configuration information to the source distribution unit of the base station, including the candidate One or more of the target cell information and the information that triggers the change of the serving cell, so that The source distribution unit of the base station triggers the serving cell change process of the user equipment based on the mobility-related configuration information.
  • the candidate target distribution unit of the base station when the candidate target distribution unit of the base station is selected as the target distribution unit of the base station and the user equipment successfully accesses the target cell, the candidate target distribution unit of the base station sends an access success message to the centralized unit of the base station to indicate that the user equipment is successful. Access the target cell under the target distribution unit of the base station.
  • Some embodiments of the present disclosure provide a centralized unit of a base station, including: a memory; and a processor coupled to the memory, the processor being configured to execute a serving cell changing method based on instructions stored in the memory. .
  • Some embodiments of the present disclosure provide a distribution unit of a base station, including: a memory; and a processor coupled to the memory, the processor being configured to, based on instructions stored in the memory, act as a source distribution unit When it is a candidate target distribution unit, the serving cell changing method executed by the source distribution unit is executed. When it is a candidate target distribution unit, the serving cell changing method executed by the candidate target distribution unit is executed.
  • Some embodiments of the present disclosure provide a communication system, including: a centralized unit of a base station; and a distributed unit of the base station.
  • Some embodiments of the present disclosure provide a non-transitory computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the serving cell changing method of each embodiment are implemented.
  • Figure 1 shows a schematic diagram of the 5G wireless network architecture.
  • Figure 2 shows a schematic diagram of the protocol layer division of CU, DU and AAU of a 5G base station.
  • Figure 3 shows a schematic diagram of terminal serving cell changes under the CU-DU separation architecture.
  • Figure 4 shows a schematic flowchart of a method for changing the serving cell based on the first layer information and the second layer information in the Intra-CU inter-DU scenario according to some embodiments of the present disclosure.
  • Figure 5 shows a schematic diagram of a terminal switching serving cells in a dense cell scenario.
  • Figure 6 shows a schematic diagram of the change of primary and secondary cells in a dual connectivity scenario.
  • Figure 7 shows a schematic structural diagram of a centralized unit of a base station according to some embodiments of the present disclosure.
  • Figure 8 shows a schematic structural diagram of a distribution unit of a base station according to some embodiments of the present disclosure.
  • Figure 9 shows a schematic structural diagram of a communication system according to some embodiments of the present disclosure.
  • Figure 10 shows a schematic structural diagram of a centralized unit of a base station according to some embodiments of the present disclosure.
  • Figure 11 shows a schematic structural diagram of a distribution unit of a base station according to some embodiments of the present disclosure.
  • Figure 12 shows a schematic structural diagram of a distribution unit of a base station according to some embodiments of the present disclosure.
  • Figure 1 shows a schematic diagram of the 5G wireless network architecture.
  • 5G 5th Generation Mobile Communication Technology, 5G for short
  • 5G base station adopts a separate architecture of CU (Centralized Unit) and DU (Distributed Unit), including CU, DU and AAU (Active Antenna Unit).
  • CU Centralized Unit
  • DU Distributed Unit
  • AAU Active Antenna Unit
  • Figure 2 shows a schematic diagram of the protocol layer division of CU, DU and AAU of a 5G base station.
  • CU includes RRC (Radio Resource Control, Radio Resource Control) layer (RRC layer belongs to the third layer) and PDCP (Packet Data Convergence Protocol, packet data convergence protocol) layer
  • RRC Radio Resource Control
  • PDCP Packet Data Convergence Protocol, packet data convergence protocol
  • DU includes RLC (Radio Link Control, Wireless link control) layer, MAC (medium access control, media access control) layer and High-PHY (high physical) layer
  • AAU includes Low-PHY (low physical) layer, RF (Radio Frequency, radio frequency) layer and antenna wait.
  • Figure 3 shows a schematic diagram of terminal serving cell changes under the CU-DU separation architecture.
  • one CU controls multiple DUs, and each DU manages multiple cells.
  • Each cell can be identified with a PCI (Physical Cell Identifier, physical cell identifier).
  • PCI Physical Cell Identifier, physical cell identifier
  • the terminal moves in the network, it will switch from the cell managed by DU-1 to the cell managed by DU-2, and the serving cell will change.
  • PCI Physical Cell Identifier, physical cell identifier
  • a method of triggering serving cell changes based on L1 (first layer) measurement configuration and L2 (second layer) signaling indication is introduced to effectively reduce Network signaling overhead and delay improve the flexibility of serving cell changes.
  • the first layer is the physical layer
  • the second layer is the media access control layer.
  • the embodiment of the present disclosure proposes a process for triggering and completing the change of the serving cell based on the first layer information or the second layer information to reduce delay and signaling overhead.
  • Figure 4 shows a schematic flowchart of a method for changing the serving cell based on the first layer information and the second layer information in the Intra-CU inter-DU scenario according to some embodiments of the present disclosure.
  • the distribution unit and serving cell where the UE (User Equipment) is currently located are called the source distribution unit and the source serving cell respectively.
  • the source distribution unit is set to Source gNB-DU. During the changing process of the serving cell, it may serve as the source distribution unit of the UE.
  • Each candidate serving cell of the new serving cell is called a candidate target cell, and the distribution unit to which the candidate target cell belongs is called a candidate target distribution unit.
  • the candidate target distribution unit is set to Candidate gNB-DU, and the final selected one is the candidate for the new serving cell of the UE.
  • the target cell is transformed into the target serving cell (the target serving cell is also called the target cell).
  • the distribution unit to which the target cell belongs is called the target distribution unit, and the target distribution unit is set to target gNB-DU.
  • the source distribution unit and each candidate target distribution unit may belong to the same centralized unit, and the centralized unit is set to gNB-CU.
  • the serving cell changing method in this embodiment includes the following steps.
  • Step 41 The UE reports the measurement report (Measurement Report) to Source gNB-DU.
  • the measurement report includes, for example, signal measurement results of the current cell and neighboring cells.
  • Step 42 Source gNB-DU forwards the received measurement report to gNB-CU through the uplink radio resource control message change message (UL RRC Message Transfer message).
  • UL RRC Message Transfer message uplink radio resource control message change message
  • Step 43 The gNB-CU can determine the candidate target cell of the UE based on the measurement report, for example, select a neighboring cell with good signal quality as the candidate target cell of the UE.
  • gNB-CU sends a user equipment context setup request message (UE Context Setup Request message) to the Candidate gNB-DU corresponding to the candidate target cell to request the establishment of UE context (UE Context) or data bearer (Data Bearer).
  • the message carries the following One or more items of the information: used to indicate that the user equipment context establishment request message is an indication information for initiating the serving cell change process based on the first layer information or the second layer information, and the requested candidate target cell information.
  • the candidate target cell information includes, for example, the cell index or cell identification of the candidate target cell.
  • Step 44 Candidate gNB-DU feeds back the user equipment context establishment response message (UE Context Setup Response message) to gNB-CU. This message carries the candidate target cell information that accepts the request.
  • UE Context Setup Response message UE Context Setup Response message
  • whether the candidate target cell accepts the request can be determined based on the load of the candidate target cell and other information.
  • the candidate target cell that accepts the request reserves resources for user equipment that may access.
  • Step 45 gNB-CU sends a downlink radio resource control message change message (DL RRC Message Transfer message) to Source gNB-DU.
  • the message carries the mobility-related configuration information generated by gNB-CU, so that Source gNB-DU triggers the UE Service cell change process.
  • Mobility-related configuration information includes one or more of the following: candidate target cell information that accepts requests; information that triggers changes in serving cells, such as trigger conditions and thresholds. Subsequent steps 46-48 are described in " "Candidate target cell” all refers to the candidate target cell that accepts the request.
  • Mobility-related configuration information is, for example, Radio Resource Control Reconfiguration (RRC Reconfiguration) information.
  • RRC Reconfiguration Radio Resource Control Reconfiguration
  • Step 46 Source gNB-DU delivers the first layer measurement configuration (ie, physical layer measurement configuration) for the candidate target cell to the UE, including beam measurement configuration, etc.
  • first layer measurement configuration ie, physical layer measurement configuration
  • Step 47 The UE performs measurements on the candidate target cell according to the received measurement configuration, and when the reporting conditions are met, reports the measurement report on the candidate target cell to Source gNB-DU.
  • Step 48 Source gNB-DU sends the second layer indication information to the user equipment based on the measurement report of the candidate target cell and the information that triggers the change of the serving cell, which carries the target cell information under the target distribution unit of the base station and instructs the user equipment. Access the target cell under the target distribution unit of the base station.
  • Source gNB-DU selects one from each candidate target cell as the target cell (Target gNB-DU) based on the measurement report of the candidate target cell.
  • Source gNB-DU sends the second layer indication information to the user equipment based on the information that triggers the change of the serving cell and determines that the triggering conditions are met.
  • the second layer indication information includes an updated transmission configuration indicator (Transmission Configuration Indicator, TCI), which carries target cell information under the target distribution unit of the base station.
  • TCI Transmission Configuration Indicator
  • the second layer indication information is, for example, MAC CE (Control Element, control element) signaling, and the MAC CE includes the updated TCI.
  • the target cell information includes the cell index or cell identification of the target cell.
  • Step 49 The UE initiates a connection to the target cell according to the TCI indication in the MAC CE signaling, and randomly accesses the Target gNB-DU corresponding to the target cell.
  • Step 410 Target gNB-DU sends an access success message (Access Success message) to gNB-CU.
  • This message is used to indicate that the UE has successfully connected to Target gNB-DU, and the message carries the target cell used to indicate successful connection.
  • Identification information (such as Serving cell ID information).
  • the above embodiment combines the advantages of beam switching, based on network pre-configuration, using L1 measurement configuration and reported measurement results and control of L2 signaling indications to trigger and complete the serving cell change process, thereby based on the first layer information or the second layer
  • the information triggers and completes the change of the serving cell, which can effectively reduce the network signaling load and delay in mobility scenarios and reduce delays.
  • the method of implementing the serving cell change based on the first layer information and the second layer information can be used in the serving cell change scenario, for example, the serving cell changes in the single connection scenario (as shown in Figure 5), the dual connection scenario Change the primary cell (Primary Cell, Pcell) or primary secondary cell (Primary Secondary Cell, PScell) (Figure 6).
  • FIG. 5 shows a schematic diagram of a terminal switching serving cells in a dense cell scenario.
  • Dense community scenarios are, for example, super dense Networking (Ultra Dense Network, UDN).
  • UDN Ultra Dense Network
  • the UE moves in a dense cell scenario, and the serving cell changes from ⁇ Cell1 ⁇ to ⁇ Cell3 ⁇ and then to ⁇ Cell4 ⁇ .
  • Cell means cell.
  • Figure 6 shows a schematic diagram of the change of primary and secondary cells in a dual connectivity scenario.
  • the UE moves in the dual connectivity scenario, and the serving cell changes from ⁇ Pcell1 ⁇ to ⁇ Pcell1, PScell3 ⁇ and then to ⁇ Pcell1, PScell4 ⁇ , in which the primary and secondary cells have changed.
  • applying the method of changing the serving cell based on the first layer information and the second layer information can significantly reduce the network signaling load and reduce the user data interruption delay.
  • Figure 7 shows a schematic structural diagram of a centralized unit of a base station according to some embodiments of the present disclosure.
  • the centralized unit 700 of this embodiment includes: a memory 710 and a processor 720 coupled to the memory 710.
  • the processor 720 is configured to execute any of the foregoing embodiments based on instructions stored in the memory 710.
  • the serving cell changing method in .
  • the centralized unit of the base station determines the candidate target cell of the current user equipment, and sends a user equipment context establishment request message to the candidate target distribution unit corresponding to the candidate target cell of the current user equipment, which includes one or more of the following information:
  • the user equipment context establishment request message is an indication message for initiating the serving cell change process based on the first layer information or the second layer information, the requested candidate target cell information;
  • the centralized unit of the base station receives the candidate target cell information sent by the candidate target distribution unit
  • the user equipment context establishment response message carries the candidate target cell information that accepts the request;
  • the centralized unit of the base station sends a downlink radio resource control message change message to the source distribution unit of the base station, which carries mobility-related configuration information, so that the source distribution unit of the base station Trigger the serving cell change process of the user equipment.
  • the mobility-related configuration information sent by the centralized unit of the base station to the source distribution unit of the base station includes one or more of the following: candidate target cell information; information that triggers the change of the serving cell.
  • the candidate target cell information includes a cell index or cell identification of the candidate target cell.
  • the centralized unit of the base station receives an access success message sent by the target distribution unit of the base station, which is used to indicate that the user equipment successfully accesses the target cell under the target distribution unit of the base station.
  • the memory 710 may include, for example, system memory, fixed non-volatile storage media, etc.
  • System memory stores, for example, operating systems, applications, boot loaders, and other programs.
  • the processor 720 can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or It can be implemented by other discrete hardware components such as programmable logic devices, discrete gates or transistors.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • FPGA Field Programmable Gate Array
  • the centralized unit 700 may also include an input/output interface 730, a network interface 740, a storage interface 750, etc. These interfaces 730, 740, 750, the memory 710 and the processor 720 may be connected through a bus 760, for example.
  • the input and output interface 730 provides a connection interface for input and output devices such as a monitor, mouse, keyboard, and touch screen.
  • Network interface 740 provides a connection interface for various networked devices.
  • the storage interface 750 provides a connection interface for external storage devices such as SD cards and USB disks.
  • Bus 760 may use any of a variety of bus structures.
  • bus structures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MCA) bus, and Peripheral Component Interconnect (PCI) bus.
  • Figure 8 shows a schematic structural diagram of a distribution unit of a base station according to some embodiments of the present disclosure.
  • the distribution unit 800 of this embodiment includes: a memory 810 and a processor 820 coupled to the memory 810.
  • the processor 820 is configured to, based on instructions stored in the memory 810, when it is a source distribution unit
  • the serving cell changing method executed by the source distribution unit is executed, and when it is a candidate target distribution unit, the serving cell changing method executed by the candidate target distribution unit is executed.
  • the source distribution unit of the base station receives mobility-related configuration information sent by the centralized unit of the base station, which includes one or more of the following: candidate target cell information under the candidate target distribution unit, information that triggers the change of the serving cell; the base station The source distribution unit of the base station sends the first layer measurement configuration for the candidate target cell to the current user equipment, and receives the measurement report for the candidate target cell sent by the user equipment; the source distribution unit of the base station sends the first layer measurement configuration for the candidate target cell to the current user equipment.
  • the measurement report and the information triggering the change of the serving cell are sent to the user equipment, and the second layer indication information is carried, which carries the target cell information under the target distribution unit of the base station, and instructs the user equipment to access the target cell under the target distribution unit of the base station.
  • the candidate target distribution unit corresponding to the candidate target cell of the current user equipment receives a user equipment context establishment request message sent by the centralized unit of the base station, which includes one or more of the following information: used to indicate the user equipment context establishment
  • the request message is an instruction message for initiating the serving cell change process based on the first layer information or the second layer information, and the requested candidate target cell information
  • the candidate target distribution unit sends a user equipment context establishment response message to the centralized unit of the base station, which carries Accepting the requested candidate target cell information causes the centralized unit of the base station to send mobility-related configuration information to the source distribution unit of the base station, including one or more of the candidate target cell information and information that triggers the change of the serving cell, so that The source distribution unit of the base station triggers the serving cell change process of the user equipment based on the mobility-related configuration information.
  • the candidate target distribution unit of the base station when the candidate target distribution unit of the base station is selected as the target distribution unit of the base station and the user equipment successfully accesses the target cell, the candidate target distribution unit of the base station sends an access success message to the centralized unit of the base station to indicate that the user equipment has become the target cell. successfully access the target cell under the target distribution unit of the base station.
  • the memory 810 may include, for example, system memory, fixed non-volatile storage media, etc.
  • System memory stores, for example, operating systems, applications, boot loaders, and other programs.
  • the processor 820 can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or It can be implemented by other discrete hardware components such as programmable logic devices, discrete gates or transistors.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • FPGA Field Programmable Gate Array
  • the distribution unit 800 may also include an input and output interface 830, a network interface 840, a storage interface 850, and the like. These interfaces 830, 840, 850, the memory 810 and the processor 820 may be connected through a bus 860, for example.
  • the input and output interface 830 provides a connection interface for input and output devices such as a monitor, mouse, keyboard, and touch screen.
  • Network interface 840 provides a connection interface for various networked devices.
  • the storage interface 850 provides a connection interface for external storage devices such as SD cards and USB disks.
  • Bus 860 may use any of a variety of bus structures. For example, bus structures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MCA) bus, and Peripheral Component Interconnect (PCI) bus.
  • ISA Industry Standard Architecture
  • MCA Micro Channel Architecture
  • PCI Peripheral Component Interconnect
  • Figure 9 shows a schematic structural diagram of a communication system according to some embodiments of the present disclosure.
  • the communication system 900 of this embodiment includes: a centralized unit 700 of a base station; and a distribution unit 800 of a base station.
  • the centralized unit 700 can control multiple distributed units 800.
  • Figure 10 shows a schematic structural diagram of a centralized unit of a base station according to some embodiments of the present disclosure.
  • the centralized unit 1000 of the base station includes:
  • the determination module 1010 is configured to determine the candidate target cell of the current user equipment, and send a user equipment context establishment request message to the candidate target distribution unit corresponding to the candidate target cell of the current user equipment, which includes one or more of the following information:
  • the user equipment context establishment request message is used to indicate that the user equipment context establishment request message is instruction information for initiating the serving cell change process based on the first layer information or the second layer information, and the requested candidate target cell information;
  • the receiving module 1020 is configured to receive the user equipment context establishment response message sent by the candidate target distribution unit, which carries the candidate target cell information that accepts the request;
  • the sending module 1030 is configured to send a downlink radio resource control message change message to the source distribution unit of the base station, which carries mobility-related configuration information, so that the source distribution unit of the base station triggers the serving cell change process of the user equipment.
  • the receiving module 1020 is further configured to receive an access success message sent by the target distribution unit of the base station to indicate that the user equipment successfully accesses the target cell under the target distribution unit of the base station.
  • Figure 11 shows a schematic structural diagram of a distribution unit of a base station according to some embodiments of the present disclosure.
  • the distribution unit 1100 of the base station when used as the source distribution unit, includes:
  • the receiving module 1110 is configured to receive mobility-related configuration information sent by the centralized unit of the base station, which includes one or more of the following: accepting the candidate target cell information under the requested candidate target distribution unit, triggering the change of the serving cell Information; receiving a measurement report sent by the user equipment for the candidate target cell that accepts the request;
  • the sending module 1120 is configured to send the first layer measurement configuration for the candidate target cell that accepts the request to the current user equipment; send the second layer measurement configuration to the user equipment according to the measurement report of the candidate target cell that accepts the request and the information that triggers the change of the serving cell.
  • the layer indication information carries the target cell information under the target distribution unit of the base station and instructs the user equipment to access the target cell under the target distribution unit of the base station.
  • the sending module 1120 is configured to select one of the candidate target cells that accepts the request as the target cell according to the measurement report of the candidate target cell that accepts the request, and based on the information that triggers the change of the serving cell, after determining that the In the case of triggering conditions, the second layer indication information is sent to the user equipment.
  • Figure 12 shows a schematic structural diagram of a distribution unit of a base station according to some embodiments of the present disclosure.
  • the distribution unit 1200 of the base station when used as a candidate target distribution unit, includes:
  • the receiving module 1210 is configured to receive the user equipment context establishment request message sent by the centralized unit of the base station, which includes one or more of the following information: used to indicate that the user equipment context establishment request message is for the first layer-based Information or second-layer information realizes the instruction information for initiating the serving cell change process and the requested candidate target cell information;
  • the sending module 1220 is configured to send a user equipment context establishment response message, which carries the candidate target cell information that accepts the request, so that the centralized unit of the base station sends mobility-related configuration information to the source distribution unit of the base station, including the candidate target that accepts the request.
  • a user equipment context establishment response message which carries the candidate target cell information that accepts the request
  • the centralized unit of the base station sends mobility-related configuration information to the source distribution unit of the base station, including the candidate target that accepts the request.
  • One or more of the cell information and the information that triggers the serving cell change enables the source distribution unit of the base station to trigger the serving cell change process of the user equipment based on the mobility-related configuration information.
  • the sending module 1220 is also configured to, when selected as the target distribution unit of the base station and the user equipment successfully accesses the target cell, send an access success message to the centralized unit of the base station to indicate to the user The device successfully accesses the target cell under the target distribution unit of the base station.
  • Some embodiments of the present disclosure provide a non-transitory computer-readable storage medium on which a computer program is stored A program that, when executed by a processor, implements the steps of the serving cell changing method of each embodiment.
  • embodiments of the present disclosure may be provided as methods, systems, or computer program products. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment that combines software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more non-transitory computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer program code embodied therein. .
  • These computer program instructions may also be stored in a computer-readable memory that causes a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction means, the instructions
  • the device implements the functions specified in a process or processes of the flowchart and/or a block or blocks of the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device, causing a series of operating steps to be performed on the computer or other programmable device to produce computer-implemented processing, thereby executing on the computer or other programmable device.
  • Instructions provide steps for implementing the functions specified in a process or processes of a flowchart diagram and/or a block or blocks of a block diagram.

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Abstract

本公开提出一种服务小区改变方法、基站的集中/分布单元及通信***，涉及无线通信领域。该方法包括：基站的集中单元确定当前用户设备的候选目标小区，向候选目标小区对应的候选目标分布单元发送用户设备上下文建立请求消息，其中包括用于指示该消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息等；接收候选目标分布单元发送的用户设备上下文建立响应消息，其中携带接受请求的候选目标小区信息；向基站的源分布单元发送下行无线资源控制消息改变消息，其中携带移动性相关配置信息，使得基站的源分布单元触发用户设备的服务小区改变流程。从而减小延迟及信令开销。

Description

服务小区改变方法、基站的集中/分布单元及通信***
相关申请的交叉引用
本申请是以CN申请号为202210434786.2，申请日为2022年4月24日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及无线通信领域，特别涉及一种服务小区改变方法、基站的集中/分布单元及通信***。
背景技术
NR(New Radio，新空口)网络相比LTE(Long Term Evolution，长期演进)网络，小区的频点更高，因此小区覆盖半径变小，用户设备在网络中会经历更加频繁的服务小区改变流程。当终端从一个小区的覆盖区域移动到另一个小区时，需要在某个时刻进行服务小区的改变。当前服务小区更改流程是基于第三层(L3)测量的，并由RRC(Radio Resource Control，无线资源控制)信令触发，所有流程都需要完整的第二层(L2)和第一层(L1)重置，因此会引入更多的延迟及信令开销。
发明内容
本公开一些实施例提出一种服务小区改变方法，包括：
基站的集中单元确定当前用户设备的候选目标小区，向当前用户设备的候选目标小区对应的候选目标分布单元发送用户设备上下文建立请求消息，其中包括以下信息中的一项或多项：用于指示所述用户设备上下文建立请求消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息；
基站的集中单元接收候选目标分布单元发送的用户设备上下文建立响应消息，其中携带接受请求的候选目标小区信息；
基站的集中单元向基站的源分布单元发送下行无线资源控制消息改变消息，其中携带移动性相关配置信息，使得基站的源分布单元触发用户设备的服务小区改变流程。
在一些实施例中，基站的集中单元向基站的源分布单元发送的移动性相关配置信息包括以下中的一项或多项：
候选目标小区信息；
触发服务小区改变的信息。
在一些实施例中，所述候选目标小区信息包括候选目标小区的小区索引或小区标识。
在一些实施例中，还包括：基站的集中单元接收基站的目标分布单元发送的接入成功消息，用于指示用户设备成功接入基站的目标分布单元下的目标小区。
在一些实施例中，还包括：基站的源分布单元向用户设备发送针对所述候选目标小区的第一层测量配置，并接收用户设备发送的针对所述候选目标小区的测量报告。
在一些实施例中，还包括：基站的源分布单元根据所述候选目标小区的测量报告和触发服务小区改变的信息，向用户设备发送第二层指示信息，其中携带基站的目标分布单元下的目标小区信息，指示用户设备接入基站的目标分布单元下的目标小区。
在一些实施例中，所述第二层指示信息包括更新的传输配置指示，其中携带基站的目标分布单元下的目标小区信息。
在一些实施例中，所述目标小区信息包括目标小区的小区索引或小区标识。
在一些实施例中，所述第一层为物理层；所述第二层为媒体接入控制层。
本公开一些实施例提出一种服务小区改变方法，包括：
基站的源分布单元接收基站的集中单元发送的移动性相关配置信息，其中包括以下中的一项或多项：候选目标分布单元下的候选目标小区信息，触发服务小区改变的信息；
基站的源分布单元向当前用户设备发送针对所述候选目标小区的第一层测量配置，并接收用户设备发送的针对所述候选目标小区的测量报告；
基站的源分布单元根据所述候选目标小区的测量报告和触发服务小区改变的信息，向用户设备发送第二层指示信息，其中携带基站的目标分布单元下的目标小区信息，指示用户设备接入基站的目标分布单元下的目标小区。
本公开一些实施例提出一种服务小区改变方法，包括：
当前用户设备的候选目标小区对应的候选目标分布单元接收基站的集中单元发送的用户设备上下文建立请求消息，其中包括以下信息中的一项或多项：用于指示所述用户设备上下文建立请求消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息；
候选目标分布单元向基站的集中单元发送用户设备上下文建立响应消息，其中携带接受请求的候选目标小区信息，使得基站的集中单元向基站的源分布单元发送移动性相关配置信息，其中包括所述候选目标小区信息、触发服务小区改变的信息中的一项或多项，使 得基站的源分布单元基于移动性相关配置信息触发用户设备的服务小区改变流程。
在一些实施例中，基站的候选目标分布单元在被选中为基站的目标分布单元且用户设备成功接入目标小区的情况下，向基站的集中单元发送接入成功消息，用于指示用户设备成功接入基站的目标分布单元下的目标小区。
本公开一些实施例提出一种基站的集中单元，包括：存储器；以及耦接至所述存储器的处理器，所述处理器被配置为基于存储在所述存储器中的指令，执行服务小区改变方法。
本公开一些实施例提出一种基站的分布单元，包括：存储器；以及耦接至所述存储器的处理器，所述处理器被配置为基于存储在所述存储器中的指令，当为源分布单元时执行源分布单元执行的服务小区改变方法，当为候选目标分布单元时执行候选目标分布单元执行的服务小区改变方法。
本公开一些实施例提出一种通信***，包括：基站的集中单元；以及基站的分布单元。
本公开一些实施例提出一种非瞬时性计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现各实施例的服务小区改变方法的步骤。
附图说明
下面将对实施例或相关技术描述中所需要使用的附图作简单地介绍。根据下面参照附图的详细描述，可以更加清楚地理解本公开。
显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1示出5G无线网络架构示意图。
图2示出5G基站的CU、DU和AAU的协议层划分示意图。
图3示出CU-DU分离架构下终端服务小区改变的示意图。
图4示出本公开一些实施例的在Intra-CU inter-DU场景下基于第一层信息和第二层信息实现服务小区改变方法的流程示意图。
图5示出了密集小区场景下终端切换服务小区的示意图。
图6示出了双连接场景下主辅小区改变的示意图。
图7示出本公开一些实施例的基站的集中单元的结构示意图。
图8示出本公开一些实施例的基站的分布单元的结构示意图。
图9示出本公开一些实施例的通信***的结构示意图。
图10示出本公开一些实施例的基站的集中单元的结构示意图。
图11示出本公开一些实施例的基站的分布单元的结构示意图。
图12示出本公开一些实施例的基站的分布单元的结构示意图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述。
除非特别说明，否则，本公开中的“第一”“第二”等描述用来区分不同的对象，并不用来表示大小或时序等含义。
图1示出5G无线网络架构示意图。
如图1所示，5G(第五代移动通信技术，5th Generation Mobile Communication Technology，简称5G)无线网络包括5G核心网和5G基站。其中，5G基站采用CU(Centralized Unit，集中单元)和DU(Distributed Unit，分布单元)分离的架构，包括CU、DU和AAU(Active Antenna Unit,有源天线单元)。
图2示出5G基站的CU、DU和AAU的协议层划分示意图。
如图2所示，CU包括RRC(Radio Resource Control，无线资源控制)层(RRC层属于第三层)和PDCP(Packet Data Convergence Protocol，分组数据汇聚协议)层，DU包括RLC(Radio Link Control，无线链路控制)层、MAC(medium access control，媒体接入控制)层和High-PHY(高物理)层，AAU包括Low-PHY(低物理)层、RF(Radio Frequency，射频)层和天线等。
图3示出CU-DU分离架构下终端服务小区改变的示意图。
如图3所示，一个CU控制多个DU，每个DU下管理多个小区，每个小区可以用PCI(Physical Cell Identifier，物理小区标识)标识。终端在网络中移动，会从DU-1管理的小区切换到DU-2管理的小区，发生服务小区的改变。考虑同一个CU下不同DU管理的小区可以通过TA(Timing Advance，定时提前)管理获取到TA定时的提前量，因此终端在从DU-1管理的小区切换到DU-2管理的小区的过程中可以不用进行同步过程。基于此，在Intra-CU inter-DU(即，CU内跨DU)场景下，引入基于L1(第一层)测量配置和L2(第二层)信令指示触发服务小区改变的方式，有效减少网络信令开销和时延，提高服务小区改变的灵活性。其中，所述第一层为物理层；所述第二层为媒体接入控制层。本公开实施例提出了一种基于第一层信息或第二层信息触发并完成服务小区改变的流程，减小延迟及信令开销。
图4示出本公开一些实施例的在Intra-CU inter-DU场景下基于第一层信息和第二层信息实现服务小区改变方法的流程示意图。
UE(User Equipment，用户设备)当前所在的分布单元和服务小区分别称为源分布单元和源服务小区，其中，源分布单元设为Source gNB-DU，在服务小区改变过程中，可能作为UE的新服务小区的各个候选服务小区称为候选目标小区，候选目标小区所属的分布单元称为候选目标分布单元，候选目标分布单元设为Candidate gNB-DU，最终选中的作为UE的新服务小区的候选目标小区转变为目标服务小区(目标服务小区也称目标小区)，目标小区所属的分布单元称为目标分布单元，目标分布单元设为target gNB-DU。源分布单元和各个候选目标分布单元可以属于同一集中单元，该集中单元设为gNB-CU。
如图4所示，该实施例的服务小区改变方法包括以下步骤。
步骤41：UE向Source gNB-DU上报测量报告(Measurement Report)。测量报告例如包括本小区和邻小区的信号测量结果。
步骤42：Source gNB-DU通过上行无线资源控制消息改变消息(UL RRC Message Transfer消息)向gNB-CU转发收到的测量报告。
步骤43：gNB-CU根据测量报告可以确定UE的候选目标小区，例如选择信号质量良好的邻小区作为UE的候选目标小区。gNB-CU向候选目标小区对应的Candidate gNB-DU发送用户设备上下文建立请求消息(UE Context Setup Request消息)，以请求建立UE上下文(UE Context)或数据承载(Data Bearer)，该消息中携带以下信息中的一项或多项：用于指示所述用户设备上下文建立请求消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息。候选目标小区信息例如包括候选目标小区的小区索引或小区标识。
步骤44：Candidate gNB-DU向gNB-CU反馈用户设备上下文建立响应消息(UE Context Setup Response消息)，该消息携带接受请求的候选目标小区信息。
其中，可以根据候选目标小区的负载等信息决定候选目标小区是否接受请求。接受请求的候选目标小区为可能接入的用户设备预留资源。
步骤45：gNB-CU发送下行无线资源控制消息改变消息(DL RRC Message Transfer消息)给Source gNB-DU，该消息中携带gNB-CU生成的移动性相关配置信息，使得Source gNB-DU触发UE的服务小区改变流程。
移动性相关配置信息包括以下中的一项或多项：接受请求的候选目标小区信息；触发服务小区改变的信息，如触发条件和阈值等信息。后续的步骤46-48中的“所述 候选目标小区”均是指接受请求的候选目标小区。
移动性相关配置信息例如为无线资源控制重配置(RRC Reconfiguration)信息。
步骤46：Source gNB-DU向UE下发针对所述候选目标小区的第一层测量配置(即物理层测量配置)，包含波束(beam)测量配置等。
步骤47：UE根据接收到的测量配置针对所述候选目标小区进行测量，在满足上报条件时，向Source gNB-DU上报针对所述候选目标小区的测量报告。
步骤48：Source gNB-DU根据所述候选目标小区的测量报告和触发服务小区改变的信息，向用户设备发送第二层指示信息，其中携带基站的目标分布单元下的目标小区信息，指示用户设备接入基站的目标分布单元下的目标小区。
Source gNB-DU根据所述候选目标小区的测量报告，从各个候选目标小区中选择一个作为目标小区(Target gNB-DU)。Source gNB-DU根据触发服务小区改变的信息，在判定满足触发条件的情况下，向用户设备发送第二层指示信息。
所述第二层指示信息包括更新的传输配置指示(Transmission Configuration Indicator，TCI)，其中携带基站的目标分布单元下的目标小区信息。所述第二层指示信息例如为MAC CE(Control Element，控制单元)信令，MAC CE包括更新的TCI。
所述目标小区信息包括目标小区的小区索引或小区标识。
步骤49：UE根据MAC CE信令中TCI的指示，向目标小区发起连接，随机接入目标小区对应的Target gNB-DU。
步骤410：Target gNB-DU向gNB-CU发送接入成功消息(Access Success消息)，该消息用于指示UE已经成功连接到Target gNB-DU，且该消息中携带用于指示成功连接的目标小区的标识信息(如Serving cell ID信息)。
上述实施例，结合波束切换的优势，基于网络预配置，利用L1测量配置和上报的测量结果以及L2信令指示的控制，触发并完成服务小区改变流程，从而基于第一层信息或第二层信息触发并完成服务小区改变，可以有效减少移动性场景中的网络信令负载和时延，减少延迟。
在Intra-CU inter-DU场景下基于第一层信息和第二层信息实现服务小区改变方法可以用于服务小区改变场景，例如，单连接场景下服务小区改变(如图5)，双连接场景下主小区(Primary Cell，Pcell)或主辅小区(Primary Secondary Cell，PScell)改变(如图6)。
图5示出了密集小区场景下终端切换服务小区的示意图。密集小区场景例如为超密集 组网(Ultra Dense Network，UDN)。如图5所示，UE在密集小区场景中移动，服务小区从{Cell1}变为{Cell3}再变为{Cell4}。“Cell”表示小区。
图6示出了双连接场景下主辅小区改变的示意图。如图6所示，UE在双连接场景中移动，服务小区从{Pcell1}变为{Pcell1，PScell3}再变为{Pcell1，PScell4}，其中主辅小区发生了改变。
在上述各场景中，应用基于第一层信息和第二层信息实现服务小区改变方法可以显著减少网络信令负载，降低用户数据中断时延。
图7示出本公开一些实施例的基站的集中单元的结构示意图。
如图7所示，该实施例的集中单元700包括：存储器710以及耦接至该存储器710的处理器720，处理器720被配置为基于存储在存储器710中的指令，执行前述任意一些实施例中的服务小区改变方法。
例如，基站的集中单元确定当前用户设备的候选目标小区，向当前用户设备的候选目标小区对应的候选目标分布单元发送用户设备上下文建立请求消息，其中包括以下信息中的一项或多项：用于指示所述用户设备上下文建立请求消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息；基站的集中单元接收候选目标分布单元发送的用户设备上下文建立响应消息，其中携带接受请求的候选目标小区信息；基站的集中单元向基站的源分布单元发送下行无线资源控制消息改变消息，其中携带移动性相关配置信息，使得基站的源分布单元触发用户设备的服务小区改变流程。
基站的集中单元向基站的源分布单元发送的移动性相关配置信息包括以下中的一项或多项：候选目标小区信息；触发服务小区改变的信息。
所述候选目标小区信息包括候选目标小区的小区索引或小区标识。
例如，基站的集中单元接收基站的目标分布单元发送的接入成功消息，用于指示用户设备成功接入基站的目标分布单元下的目标小区。
其中，存储器710例如可以包括***存储器、固定非易失性存储介质等。***存储器例如存储有操作***、应用程序、引导装载程序(Boot Loader)以及其他程序等。
其中，处理器720可以用通用处理器、数字信号处理器(Digital Signal Processor，DSP)、应用专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field Programmable Gate Array，FPGA)或其它可编程逻辑设备、分立门或晶体管等分立硬件组件方式来实现。
集中单元700还可以包括输入输出接口730、网络接口740、存储接口750等。这些接口730，740，750以及存储器710和处理器720之间例如可以通过总线760连接。其中，输入输出接口730为显示器、鼠标、键盘、触摸屏等输入输出设备提供连接接口。网络接口740为各种联网设备提供连接接口。存储接口750为SD卡、U盘等外置存储设备提供连接接口。总线760可以使用多种总线结构中的任意总线结构。例如，总线结构包括但不限于工业标准体系结构(Industry Standard Architecture，ISA)总线、微通道体系结构(Micro Channel Architecture，MCA)总线、***组件互连(Peripheral Component Interconnect，PCI)总线。
图8示出本公开一些实施例的基站的分布单元的结构示意图。
如图8所示，该实施例的分布单元800包括：存储器810以及耦接至该存储器810的处理器820，处理器820被配置为基于存储在存储器810中的指令，当为源分布单元时执行源分布单元执行的服务小区改变方法，当为候选目标分布单元时执行候选目标分布单元执行的服务小区改变方法。
例如，基站的源分布单元接收基站的集中单元发送的移动性相关配置信息，其中包括以下中的一项或多项：候选目标分布单元下的候选目标小区信息，触发服务小区改变的信息；基站的源分布单元向当前用户设备发送针对所述候选目标小区的第一层测量配置，并接收用户设备发送的针对所述候选目标小区的测量报告；基站的源分布单元根据所述候选目标小区的测量报告和触发服务小区改变的信息，向用户设备发送第二层指示信息，其中携带基站的目标分布单元下的目标小区信息，指示用户设备接入基站的目标分布单元下的目标小区。
例如，当前用户设备的候选目标小区对应的候选目标分布单元接收基站的集中单元发送的用户设备上下文建立请求消息，其中包括以下信息中的一项或多项：用于指示所述用户设备上下文建立请求消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息；候选目标分布单元向基站的集中单元发送用户设备上下文建立响应消息，其中携带接受请求的候选目标小区信息，使得基站的集中单元向基站的源分布单元发送移动性相关配置信息，其中包括所述候选目标小区信息、触发服务小区改变的信息中的一项或多项，使得基站的源分布单元基于移动性相关配置信息触发用户设备的服务小区改变流程。
例如，基站的候选目标分布单元在被选中为基站的目标分布单元且用户设备成功接入目标小区的情况下，向基站的集中单元发送接入成功消息，用于指示用户设备成 功接入基站的目标分布单元下的目标小区。
其中，存储器810例如可以包括***存储器、固定非易失性存储介质等。***存储器例如存储有操作***、应用程序、引导装载程序(Boot Loader)以及其他程序等。
其中，处理器820可以用通用处理器、数字信号处理器(Digital Signal Processor，DSP)、应用专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field Programmable Gate Array，FPGA)或其它可编程逻辑设备、分立门或晶体管等分立硬件组件方式来实现。
分布单元800还可以包括输入输出接口830、网络接口840、存储接口850等。这些接口830，840，850以及存储器810和处理器820之间例如可以通过总线860连接。其中，输入输出接口830为显示器、鼠标、键盘、触摸屏等输入输出设备提供连接接口。网络接口840为各种联网设备提供连接接口。存储接口850为SD卡、U盘等外置存储设备提供连接接口。总线860可以使用多种总线结构中的任意总线结构。例如，总线结构包括但不限于工业标准体系结构(Industry Standard Architecture，ISA)总线、微通道体系结构(Micro Channel Architecture，MCA)总线、***组件互连(Peripheral Component Interconnect，PCI)总线。
图9示出本公开一些实施例的通信***的结构示意图。如图9所示，该实施例的通信***900包括：基站的集中单元700；以及基站的分布单元800。集中单元700可以控制多个分布单元800。
图10示出本公开一些实施例的基站的集中单元的结构示意图。
如图10所示，基站的集中单元1000包括：
确定模块1010，被配置为确定当前用户设备的候选目标小区，向当前用户设备的候选目标小区对应的候选目标分布单元发送用户设备上下文建立请求消息，其中包括以下信息中的一项或多项：用于指示所述用户设备上下文建立请求消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息；
接收模块1020，被配置为接收候选目标分布单元发送的用户设备上下文建立响应消息，其中携带接受请求的候选目标小区信息；
发送模块1030，被配置为向基站的源分布单元发送下行无线资源控制消息改变消息，其中携带移动性相关配置信息，使得基站的源分布单元触发用户设备的服务小区改变流程。
在一些实施例中，接收模块1020，还被配置为接收基站的目标分布单元发送的接入成功消息，用于指示用户设备成功接入基站的目标分布单元下的目标小区。
图11示出本公开一些实施例的基站的分布单元的结构示意图。
如图11所示，基站的分布单元1100，作为源分布单元时，包括：
接收模块1110，被配置为接收基站的集中单元发送的移动性相关配置信息，其中包括以下中的一项或多项：接受请求的候选目标分布单元下的候选目标小区信息，触发服务小区改变的信息；接收用户设备发送的针对接受请求的候选目标小区的测量报告；
发送模块1120，被配置为向当前用户设备发送针对接受请求的候选目标小区的第一层测量配置；根据接受请求的候选目标小区的测量报告和触发服务小区改变的信息，向用户设备发送第二层指示信息，其中携带基站的目标分布单元下的目标小区信息，指示用户设备接入基站的目标分布单元下的目标小区。
在一些实施例中，发送模块1120，被配置为根据接受请求的候选目标小区的测量报告，从各个接受请求的候选目标小区中选择一个作为目标小区，根据触发服务小区改变的信息，在判定满足触发条件的情况下，向用户设备发送第二层指示信息。
图12示出本公开一些实施例的基站的分布单元的结构示意图。
如图12所示，基站的分布单元1200，作为候选目标分布单元时，包括：
接收模块1210，被配置为接收基站的集中单元发送的用户设备上下文建立请求消息，其中包括以下信息中的一项或多项：用于指示所述用户设备上下文建立请求消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息；
发送模块1220，被配置为发送用户设备上下文建立响应消息，其中携带接受请求的候选目标小区信息，使得基站的集中单元向基站的源分布单元发送移动性相关配置信息，其中包括接受请求的候选目标小区信息、触发服务小区改变的信息中的一项或多项，使得基站的源分布单元基于移动性相关配置信息触发用户设备的服务小区改变流程。
在一些实施例中，发送模块1220，还被配置为在被选中为基站的目标分布单元且用户设备成功接入目标小区的情况下，向基站的集中单元发送接入成功消息，用于指示用户设备成功接入基站的目标分布单元下的目标小区。
本公开一些实施例提出一种非瞬时性计算机可读存储介质，其上存储有计算机程 序，该程序被处理器执行时实现各实施例的服务小区改变方法的步骤。
本领域内的技术人员应当明白，本公开的实施例可提供为方法、***、或计算机程序产品。因此，本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开可采用在一个或多个其中包括有计算机程序代码的非瞬时性计算机可读存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(***)、和计算机程序产品的流程图和/或方框图来描述的。应理解为可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述仅为本公开的较佳实施例，并不用以限制本公开，凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包括在本公开的保护范围之内。

Claims (21)

  1. 一种服务小区改变方法，包括：
    基站的集中单元确定当前用户设备的候选目标小区，向当前用户设备的候选目标小区对应的候选目标分布单元发送用户设备上下文建立请求消息，其中包括以下信息中的一项或多项：用于指示所述用户设备上下文建立请求消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息；
    基站的集中单元接收候选目标分布单元发送的用户设备上下文建立响应消息，其中携带接受请求的候选目标小区信息；
    基站的集中单元向基站的源分布单元发送下行无线资源控制消息改变消息，其中携带移动性相关配置信息，使得基站的源分布单元触发用户设备的服务小区改变流程。
  2. 根据权利要求1所述的方法，其中，基站的集中单元向基站的源分布单元发送的移动性相关配置信息包括以下中的一项或多项：
    接受请求的候选目标小区信息；
    触发服务小区改变的信息。
  3. 根据权利要求1或2所述的方法，其中，所述候选目标小区信息包括候选目标小区的小区索引或小区标识。
  4. 根据权利要求1所述的方法，还包括：
    基站的集中单元接收基站的目标分布单元发送的接入成功消息，指示用户设备成功接入基站的目标分布单元下的目标小区。
  5. 根据权利要求2所述的方法，还包括：
    基站的源分布单元向用户设备发送针对接受请求的候选目标小区的第一层测量配置，并接收用户设备发送的针对接受请求的候选目标小区的测量报告。
  6. 根据权利要求5所述的方法，还包括：
    基站的源分布单元根据接受请求的候选目标小区的测量报告和触发服务小区改变的信息，向用户设备发送第二层指示信息，其中携带基站的目标分布单元下的目标小区信息，指示用户设备接入基站的目标分布单元下的目标小区。
  7. 根据权利要求6所述的方法，其中，所述第二层指示信息包括更新的传输配置指示，其中携带基站的目标分布单元下的目标小区信息。
  8. 根据权利要求6所述的方法，其中，所述目标小区信息包括目标小区的小区索引或小区标识。
  9. 根据权利要求1-2，4-8任一项所述的方法，其中：
    所述第一层为物理层；
    所述第二层为媒体接入控制层。
  10. 一种服务小区改变方法，包括：
    基站的源分布单元接收基站的集中单元发送的移动性相关配置信息，其中包括以下中的一项或多项：接受请求的候选目标分布单元下的候选目标小区信息，触发服务小区改变的信息；
    基站的源分布单元向当前用户设备发送针对接受请求的候选目标小区的第一层测量配置，并接收用户设备发送的针对接受请求的候选目标小区的测量报告；
    基站的源分布单元根据接受请求的候选目标小区的测量报告和触发服务小区改变的信息，向用户设备发送第二层指示信息，其中携带基站的目标分布单元下的目标小区信息，指示用户设备接入基站的目标分布单元下的目标小区。
  11. 根据权利要求10所述的方法，基站的源分布单元向用户设备发送第二层指示信息包括：
    基站的源分布单元根据接受请求的候选目标小区的测量报告，从各个接受请求的候选目标小区中选择一个作为目标小区，根据触发服务小区改变的信息，在判定满足触发条件的情况下，向用户设备发送第二层指示信息。
  12. 一种服务小区改变方法，包括：
    当前用户设备的候选目标小区对应的候选目标分布单元接收基站的集中单元发送的用户设备上下文建立请求消息，其中包括以下信息中的一项或多项：用于指示所述用户设备上下文建立请求消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息；
    候选目标分布单元向基站的集中单元发送用户设备上下文建立响应消息，其中携带接受请求的候选目标小区信息，使得基站的集中单元向基站的源分布单元发送移动性相关配置信息，其中包括接受请求的候选目标小区信息、触发服务小区改变的信息中的一项或多项，使得基站的源分布单元基于移动性相关配置信息触发用户设备的服务小区改变流程。
  13. 根据权利要求12所述的方法，还包括：
    基站的候选目标分布单元在被选中为基站的目标分布单元且用户设备成功接入目标小区的情况下，向基站的集中单元发送接入成功消息，用于指示用户设备成功接入基站的目标分布单元下的目标小区。
  14. 一种基站的集中单元，包括：
    存储器；以及耦接至所述存储器的处理器，所述处理器被配置为基于存储在所述存储器中的指令，执行权利要求1-4中任一项所述的服务小区改变方法。
  15. 一种基站的分布单元，包括：
    存储器；以及耦接至所述存储器的处理器，所述处理器被配置为基于存储在所述存储器中的指令，当为源分布单元时执行权利要求10-11中任一项所述的服务小区改变方法，当为候选目标分布单元时执行权利要求12-13中任一项所述的服务小区改变方法。
  16. 一种基站的集中单元，包括：
    确定模块，被配置为确定当前用户设备的候选目标小区，向当前用户设备的候选目标小区对应的候选目标分布单元发送用户设备上下文建立请求消息，其中包括以下 信息中的一项或多项：用于指示所述用户设备上下文建立请求消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息；
    接收模块，被配置为接收候选目标分布单元发送的用户设备上下文建立响应消息，其中携带接受请求的候选目标小区信息；
    发送模块，被配置为向基站的源分布单元发送下行无线资源控制消息改变消息，其中携带移动性相关配置信息，使得基站的源分布单元触发用户设备的服务小区改变流程。
  17. 一种基站的分布单元，作为源分布单元时，包括：
    接收模块，被配置为接收基站的集中单元发送的移动性相关配置信息，其中包括以下中的一项或多项：接受请求的候选目标分布单元下的候选目标小区信息，触发服务小区改变的信息；接收用户设备发送的针对接受请求的候选目标小区的测量报告；
    发送模块，被配置为向当前用户设备发送针对接受请求的候选目标小区的第一层测量配置；根据接受请求的候选目标小区的测量报告和触发服务小区改变的信息，向用户设备发送第二层指示信息，其中携带基站的目标分布单元下的目标小区信息，指示用户设备接入基站的目标分布单元下的目标小区。
  18. 一种基站的分布单元，作为候选目标分布单元时，包括：
    接收模块，被配置为接收基站的集中单元发送的用户设备上下文建立请求消息，其中包括以下信息中的一项或多项：用于指示所述用户设备上下文建立请求消息是针对基于第一层信息或第二层信息实现服务小区改变流程发起的指示信息，请求的候选目标小区信息；
    发送模块，被配置为发送用户设备上下文建立响应消息，其中携带接受请求的候选目标小区信息，使得基站的集中单元向基站的源分布单元发送移动性相关配置信息，其中包括接受请求的候选目标小区信息、触发服务小区改变的信息中的一项或多项，使得基站的源分布单元基于移动性相关配置信息触发用户设备的服务小区改变流程。
  19. 一种通信***，包括：
    权利要求14或16所述的基站的集中单元；以及
    权利要求15、17或18所述的基站的分布单元。
  20. 一种非瞬时性计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时实现权利要求1-13中任一项所述的服务小区改变方法的步骤。
  21. 一种计算机程序，包括：
    指令，所述指令由处理器执行时使所述处理器执行根据权利要求1-13中任一项所述的服务小区改变方法。
PCT/CN2023/090221 2022-04-24 2023-04-24 服务小区改变方法、基站的集中/分布单元及通信*** WO2023207883A1 (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106792934A (zh) * 2015-11-25 2017-05-31 大唐移动通信设备有限公司 一种切换方法及装置
WO2021158577A1 (en) * 2020-02-03 2021-08-12 Google Llc Conditional configuration in a distributed base station
US20220030498A1 (en) * 2019-01-11 2022-01-27 Nec Corporation Distributed unit, central unit, radio access network node, and method therefor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106792934A (zh) * 2015-11-25 2017-05-31 大唐移动通信设备有限公司 一种切换方法及装置
US20220030498A1 (en) * 2019-01-11 2022-01-27 Nec Corporation Distributed unit, central unit, radio access network node, and method therefor
WO2021158577A1 (en) * 2020-02-03 2021-08-12 Google Llc Conditional configuration in a distributed base station

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