WO2025157293A1 - 移动性管理方法、装置、终端设备、网络设备和存储介质 - Google Patents

移动性管理方法、装置、终端设备、网络设备和存储介质

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Publication number
WO2025157293A1
WO2025157293A1 PCT/CN2025/074988 CN2025074988W WO2025157293A1 WO 2025157293 A1 WO2025157293 A1 WO 2025157293A1 CN 2025074988 W CN2025074988 W CN 2025074988W WO 2025157293 A1 WO2025157293 A1 WO 2025157293A1
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WO
WIPO (PCT)
Prior art keywords
execution condition
measurement
condition information
information
cells
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/CN2025/074988
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English (en)
French (fr)
Inventor
唐晓璇
刘潇蔓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Mobile Communications Group Co Ltd
Research Institute of China Mobile Communication Co Ltd
Original Assignee
China Mobile Communications Group Co Ltd
Research Institute of China Mobile Communication Co Ltd
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Filing date
Publication date
Application filed by China Mobile Communications Group Co Ltd, Research Institute of China Mobile Communication Co Ltd filed Critical China Mobile Communications Group Co Ltd
Publication of WO2025157293A1 publication Critical patent/WO2025157293A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the present disclosure relates to the field of mobile communication technologies, and in particular to a mobility management method, apparatus, terminal equipment, network equipment, and storage medium.
  • terminal devices that are currently using network services may face the problem of current network service interruption or quality degradation due to factors such as mobility requirements, wireless transmission service load adjustment, activation operation and maintenance, equipment failure, and cell load.
  • the existing solution introduces a cross-cell mobility mechanism based on layer 1 (L1)/layer 2 (L2) signaling, that is, switching is completed based on L1/L2 signaling to reduce latency.
  • the terminal device will perform L1 measurement on the configured reference signal according to the configuration on the network side, and then report the indexes of K reference signals of N cells and/or L1-reference signal received power (L1-RSRP) to the network side according to the reporting configuration. In other words, based on the measured signal conditions, the terminal device reports N ⁇ K measurement results.
  • the L1/L2 measurement reporting and subsequent MAC CE commands have reduced latency, in the FR2 "millimeter wave" frequency band, the channel status changes faster, and the switching delay needs to be further reduced and the robustness of the switching needs to be increased.
  • the present disclosure provides a mobility management method, apparatus, terminal device, network device and storage medium.
  • a mobility management method which is executed by a terminal device, including: receiving a mobility management message, the mobility management message including at least measurement configuration information and execution condition information of one or more cells; obtaining measurement information of one or more cells based at least on the measurement configuration information; and determining to access one or more target cells in the one or more cells based on the measurement information and the execution condition information.
  • the execution condition information includes: at least one of first execution condition information related to layer 1 measurement and second execution condition information related to layer 3 measurement, and based on the measurement information and the execution condition information, determining access to one or more of the one or more cells includes at least one of the following: based on the measurement information and the first execution condition information, determining access to one or more target cells in the one or more cells; and based on the measurement information, the first execution condition information and the second execution condition information, determining access to one or more target cells in the one or more cells.
  • determining access to one or more target cells among the one or more cells includes at least one of the following: in response to the measurement information satisfying the first execution condition information and the second execution condition information, determining access to one or more target cells among the one or more cells; and in response to the measurement information satisfying the second execution condition information, judging whether the measurement information satisfies the first execution condition information, and in response to the measurement information satisfying the first execution condition information, determining access to one or more target cells among the one or more cells.
  • the execution condition information includes multiple execution condition information corresponding to multiple cell types, the multiple cell types include primary cell, primary secondary cell, and secondary cell, and the execution condition information also includes measurement bias information corresponding to the multiple cell types.
  • the method further includes: accessing one or more target cells based on the type and index of the one or more target cells.
  • a mobility management method which is executed by a network device, including: sending a mobility management message, the mobility management message including at least measurement configuration information and execution condition information of one or more cells, wherein the measurement configuration information is used for the terminal device to obtain measurement information of the one or more cells, and based on the measurement information and the execution condition information, determine to access one or more target cells in the one or more cells.
  • a mobility management device comprising: a receiving unit configured to receive a mobility management message, the mobility management message including at least measurement configuration information and execution condition information of one or more cells; an acquiring unit configured to acquire measurement information of one or more cells based at least on the measurement configuration information; and a determining unit configured to determine to access one or more target cells in the one or more cells based on the measurement information and the execution condition information.
  • a mobility management device including: a sending unit, configured to send a mobility management message, the mobility management message including at least measurement configuration information and execution condition information of one or more cells, wherein the measurement configuration information is used for a terminal device to obtain measurement information of the one or more cells, and based on the measurement information and the execution condition information, determine to access one or more target cells in the one or more cells.
  • a terminal device comprising: a communication interface configured to perform wireless communication with a network device; a memory for storing computer-readable instructions; and a processor for running the computer-readable instructions so that the terminal device executes the mobility management method described in the first aspect above.
  • a network device comprising: a communication interface configured to perform wireless communication with a terminal device; a memory for storing computer-readable instructions; and a processor for running the computer-readable instructions so that the network device executes the mobility management method described in the second aspect above.
  • a non-transitory computer-readable storage medium for storing computer-readable instructions.
  • the processor executes the mobility management method as described in the first aspect above.
  • mobility management-based cell handover is triggered by the terminal device, reducing handover latency and improving robustness. While not increasing the number of candidate cells, the number of candidate cells of different types is also increased, and more accurate cell type matching is achieved without increasing signaling transmission volume. Furthermore, corresponding measurement biases are set for specific cell types and cell events, further optimizing target cell selection.
  • FIG1 is a schematic diagram illustrating a communication system to which a mobility management method according to an embodiment of the present disclosure is applied.
  • FIG2 is a flowchart illustrating a mobility management method according to an embodiment of the present disclosure.
  • FIG3 is a flowchart further illustrating a mobility management method according to an embodiment of the present disclosure.
  • FIG4 is a schematic diagram illustrating an overall flow of a mobility management method according to an embodiment of the present disclosure.
  • FIG5 is a block diagram illustrating a mobility management apparatus according to an embodiment of the present disclosure.
  • FIG6 is a block diagram further illustrating a mobility management apparatus according to an embodiment of the present disclosure.
  • FIG7 is a hardware block diagram illustrating a terminal device according to an embodiment of the present disclosure.
  • FIG8 is a hardware block diagram illustrating a network device according to an embodiment of the present disclosure.
  • FIG9 is a schematic diagram illustrating a computer-readable storage medium according to an embodiment of the present disclosure.
  • GSM global mobile communication
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • LTE-A advanced long term evolution
  • NR new radio
  • evolution system of NR system LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-U) system
  • NTN non-terrestrial communication network
  • UMTS universal mobile telecommunication system
  • WLAN wireless local area network
  • WiFi wireless fidelity
  • 5G fifth generation communication
  • communication system 1 includes three interaction domains: terminal devices (e.g., terminal devices 11 and 12), access network 20 (e.g., including network devices 21 and 22), and core network 30 (e.g., including core network devices 31 and 32).
  • terminal devices 11 and 12 can perform data communications with external data networks (e.g., but not limited to the Internet).
  • external data networks e.g., but not limited to the Internet.
  • the terminal devices 11 and 12 may be user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, intelligent terminal, wireless communication device, user agent, or user device.
  • the terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a relay device, an in-vehicle device, a wearable device, a terminal in a next-generation communication system such as a NR network or a terminal in a future-evolved public land mobile network (PLMN), etc., without specific limitation.
  • PLMN public land mobile network
  • the network devices 21 and 22 may be devices for communicating with the terminal devices 11 and 12.
  • the network devices 21 and 22 may be base transceiver stations (BTS) in GSM or CDMA communication systems, base stations (nodeBs) in WCDMA communication systems, evolved base stations (eNBs or eNodeBs) in LTE communication systems, next-generation evolved base stations (ng-eNBs) in NR communication systems, and next-generation base stations (gNBs) in NR communication systems.
  • BTS base transceiver stations
  • nodeBs base stations
  • eNBs or eNodeBs evolved base stations
  • ng-eNBs next-generation evolved base stations
  • gNBs next-generation base stations
  • the network devices 21 and 22 may be access points (APs) or relay stations in wireless local area networks (WLANs), network devices in future evolved PLMN networks, or network devices in NTN networks.
  • APs access points
  • WLANs wireless local area networks
  • network devices in future evolved PLMN networks or network
  • the network device can be a standalone node that implements all the functions of the aforementioned base station.
  • This can include a centralized unit (CU) and a distributed unit (DU), such as the gNB-CU and gNB-DU, as well as an active antenna unit (AAU).
  • the CU can implement some of the network device's functions, while the DU can implement some of the network device's functions.
  • the CU is responsible for processing non-real-time protocols and services, implementing the functions of the Radio Resource Control (RRC), Service Data Adaptation (SDAP), and Packet Data Convergence (PDCP) layers.
  • RRC Radio Resource Control
  • SDAP Service Data Adaptation
  • PDCP Packet Data Convergence
  • the DU is responsible for processing physical layer protocols and real-time services, implementing the functions of the Radio Link Control (RLC), Medium Access Control (MAC), and Physical (PHY) layers. Furthermore, the AAU implements some physical layer processing functions, RF processing, and active antenna-related functions. Since RRC layer information ultimately becomes PHY layer information, or is converted from PHY layer information, in this network deployment, higher-layer signaling (RRC) can be considered to be sent by the DU, or by both the DU and the AAU. It can be understood that the network devices 21 and 22 may include at least one of CU, DU, and AAU.
  • the core network devices 31 and 32 primarily provide user connectivity, user management, and service delivery, acting as the bearer network interface to external networks.
  • the core network devices in a 5G NR system may include the Access and Mobility Management Function (AMF) entity, the User Plane Function (UPF) entity, and the Session Management Function (SMF) entity.
  • AMF Access and Mobility Management Function
  • UPF User Plane Function
  • SMF Session Management Function
  • access network devices 21 and 22 communicate with core network devices 31 and 32 via an over-the-air technology, such as the NG interface in a 5G NR system.
  • Access network devices 21 and 22 communicate with terminal devices 11 and 12 via an over-the-air technology, such as the Uu interface.
  • the mobility management method according to the embodiment of the present disclosure will be further described below with reference to the accompanying drawings.
  • the mobility management method according to the embodiment of the present disclosure can be executed by the terminal devices 11, 12 and the access network devices 21, 22 as shown in FIG1 individually or jointly.
  • FIG 2 is a flow chart illustrating a mobility management method according to an embodiment of the present disclosure.
  • the method is executed by, for example, the terminal devices 11 and 12 described with reference to Figure 1.
  • the method includes the following steps S201-S204.
  • step S201 a mobility management message is received.
  • a terminal device receives a mobility management message from a network device. Specifically, the terminal device receives the mobility management message from its currently serving gNB-CU. Specifically, the mobility management message includes at least measurement configuration information and execution condition information for one or more cells. Furthermore, the mobility management message also includes channel state information reporting configuration information.
  • One or more cells may include one or more current serving cells, serving cell groups, candidate cells and candidate cell groups.
  • a terminal device can access two cell groups, namely a main cell group (MCG) and a secondary cell group (SCG).
  • MCG main cell group
  • SCG secondary cell group
  • MCG there may be many cells, one of which is used to initiate initial access, referred to as a main cell (PCell).
  • the MCG also includes a secondary cell (SCell).
  • SCell secondary cell
  • the SCG includes a primary secondary cell (PSCell) and a secondary cell (SCell).
  • PSCell primary secondary cell
  • SCell secondary cell
  • the PCell in the MCG and the SCell in the MCG are combined together through carrier aggregation (CA).
  • CA carrier aggregation
  • one or more cells may also be the CU and DU of a serving cell and/or a candidate cell.
  • the measurement configuration information of one or more cells carries/includes its mobility measurement configuration parameters, such as cell index, CU index, DU index, cell group index ⁇ list.
  • the channel state information report configuration information includes first channel state information report configuration information (CSI Report Configuration 1) and second channel state information report configuration information (CSI Report Configuration 2).
  • the first channel state information report configuration information indicates that the measurement reference signal is the reference signal of the serving cell
  • the second channel state information report configuration information indicates that the measurement reference signal is the reference signal of the candidate cell.
  • Execution condition information is used to evaluate measurement results from one or more cells to determine whether to access one or more target cells from the one or more cells.
  • the execution condition information includes measurement bias information corresponding to multiple cell types (e.g., PCell, PSCell, and Scell). This increases the number of candidate cells of different types without increasing the number of candidate cells.
  • step S202 measurement information of one or more cells is obtained based at least on the measurement configuration information.
  • the measurement information may include a measurement value of reference signal received power (RSRP), a measurement value of reference signal received quality (RSRQ), a measurement value of signal-to-interference-plus-noise ratio (SINR), channel quality, signal quality, etc.
  • RSRP reference signal received power
  • RSRQ measurement value of reference signal received quality
  • SINR signal-to-interference-plus-noise ratio
  • step S203 based on the measurement information and the execution condition information, it is determined to access one or more target cells among the one or more cells.
  • the execution condition information includes first execution condition information related to layer 1 measurements and/or second execution condition information related to layer 3 measurements. Access to one or more target cells among the one or more cells can be determined based on the measurement information and the first execution condition information. In other words, handover execution, i.e., access to one or more target cells among the one or more cells, can be directly determined based on the first execution condition information.
  • the measurement information is, for example, a measurement value of Reference Signal Received Power (RSRP).
  • RSRP Reference Signal Received Power
  • the first execution condition information may be at least one of the following first group of conditions, second group of conditions, and third group of conditions.
  • the first set of conditions could be:
  • L1-RSRP(s) is the maximum L1-RSRP among the L1-RSRPs of the reference signal measured when the reference signal is the reference signal of the serving cell
  • L1-RSRP(c) is the maximum L1-RSRP among the L1-RSRPs of the reference signal measured when the reference signal is the reference signal of the candidate cell.
  • Th1 and Th2 are predetermined thresholds, which may be the same or different.
  • the first set of conditions indicates that the quality of the candidate cell is better than the quality of the current serving cell to a certain extent.
  • the second set of conditions could be:
  • the second set of conditions indicates that the quality of the candidate cell is better than a certain level.
  • the third set of conditions could be: L1-RSRP(s) t1 -L1-RSRP(s) t2 ⁇ Th5;
  • the third set of conditions indicates that the serving cell quality has dropped sharply.
  • determining access to one or more target cells among the one or more cells based on the measurement information, the first execution condition information, and the second execution condition information may also include, if the measurement information satisfies the second execution condition information, determining whether the measurement information satisfies the first execution condition information, and, if the measurement information satisfies the first execution condition information, determining to perform handover, i.e., access to the one or more target cells among the one or more cells.
  • the fact that the measurement information satisfies the second execution condition information serves as a prerequisite for further determining whether the measurement information satisfies the first execution condition information.
  • the first execution condition information may be at least one of the first, second, and third groups of conditions described above.
  • the second execution condition information may be any one of measurement events A3, A4, A5, and B1.
  • measurement event A3 indicates that the quality of the intra-frequency/inter-frequency candidate cell is higher than the quality of the serving cell
  • A4 indicates that the quality of the inter-frequency candidate cell is higher than a certain threshold
  • A5 indicates that the quality of the serving cell is lower than a certain threshold and the quality of the candidate cell is higher than a certain threshold
  • B1 indicates that the quality of the inter-system candidate cell is higher than a certain threshold.
  • access to one or more target cells among the one or more cells is determined based on the measurement information, the first execution condition information, and the second execution condition information.
  • determining access to one or more target cells among the one or more cells based on the measurement information, the first execution condition information, and the second execution condition information may be determining access to one or more target cells among the one or more cells when the measurement information satisfies the first execution condition information and the second execution condition information. That is, when both the first execution condition information and the second execution condition information are satisfied, a determination is made to perform handover, i.e., access to one or more target cells among the one or more cells.
  • the first execution condition information may be at least one of the first, second, and third group conditions described above, and the second execution condition information may be at least one of the measurement events A3, A4, A5, and B1 described above.
  • the measurement and conditional measurement of the first execution condition information are triggered based on the measurement information satisfying the second execution condition information, thereby further ensuring the robustness of the mobility handover.
  • the execution condition information further includes measurement bias information corresponding to multiple cell types and/or cell events.
  • the measurement information, the measurement bias information, and the threshold value in the execution condition information are used together to perform the weighing process.
  • the same candidate cell can correspond to different types (i.e., one or more of PCell, PSCell, and Scell), and different measurement offsets Offset_type1, Offset_type2, and Offset_type3 can be set for different types.
  • TA timing advance
  • TRS tracking reference signals
  • the measurement result of the current serving primary cell is Mp
  • the type offset of the current serving primary cell is Offset_type1p
  • the event offset of the current serving primary cell is Offset_event1p
  • the measurement result of the candidate cell is Mn
  • the candidate type offset is Offset_type1n
  • the event offset of the candidate cell is Offset_event2n.
  • step S204 one or more target cells are accessed based on the type and index of the one or more target cells.
  • the configuration corresponding to the target cell is applied to access the determined one or more target cells.
  • the terminal device performs partial MAC reconstruction.
  • the target cell is considered to be the serving CU and requires both inter-DU and intra-CU handover.
  • the terminal device performs a Radio Link Control (RLC) reset and a partial or full MAC re-establishment.
  • RLC Radio Link Control
  • the target cell that meets the conditions is determined not to be a serving CU and an inter-CU handover is required. In this case, an RLC reset, partial or full MAC reestablishment, and a Packet Data Convergence Protocol (PDCP) reset are performed.
  • PDCP Packet Data Convergence Protocol
  • a terminal device triggers a cell handover based on mobility management, reducing handover latency and improving robustness. While not increasing the number of candidate cells, the number of different types of candidate cells is increased, and more accurate cell type matching is achieved without increasing the amount of signaling transmission. Furthermore, for specific cell types and cell events, corresponding measurement biases are set to further optimize target cell selection.
  • FIG 3 is a flow chart further illustrating a mobility management method according to an embodiment of the present disclosure.
  • the method is executed by, for example, the network devices 21 and 22 described with reference to Figure 1.
  • the method includes the following steps S301.
  • step S301 a mobility management message is sent.
  • a network device sends a mobility management message to a terminal device.
  • the currently serving gNB-CU sends the mobility management message to the terminal device.
  • the mobility management message includes at least measurement configuration information and execution condition information for one or more cells.
  • the mobility management message also includes channel state information reporting configuration information.
  • One or more cells may include one or more current serving cells, serving cell groups, candidate cells and candidate cell groups.
  • a terminal device can access two cell groups, namely a main cell group (MCG) and a secondary cell group (SCG).
  • MCG main cell group
  • SCG secondary cell group
  • MCG there may be many cells, one of which is used to initiate initial access, referred to as a main cell (PCell).
  • the MCG also includes a secondary cell (SCell).
  • SCell secondary cell
  • the SCG includes a primary secondary cell (PSCell) and a secondary cell (SCell).
  • PSCell primary secondary cell
  • SCell secondary cell
  • the PCell in the MCG and the SCell in the MCG are combined together through carrier aggregation (CA).
  • CA carrier aggregation
  • one or more cells may also be the CU and DU of a serving cell and/or a candidate cell.
  • the measurement configuration information of one or more cells carries/includes its mobility measurement configuration parameters, such as cell index, CU index, DU index, cell group index ⁇ list.
  • the channel state information report configuration information includes first channel state information report configuration information (CSI Report Configuration 1) and second channel state information report configuration information (CSI Report Configuration 2).
  • the first channel state information report configuration information indicates that the measurement reference signal is the reference signal of the serving cell
  • the second channel state information report configuration information indicates that the measurement reference signal is the reference signal of the candidate cell.
  • Execution condition information is used to evaluate measurement results from one or more cells to determine whether to access one or more target cells from the one or more cells.
  • the execution condition information includes measurement bias information corresponding to multiple cell types (e.g., PCell, PSCell, and Scell). This increases the number of candidate cells of different types without increasing the number of candidate cells.
  • FIG4 is a schematic diagram illustrating an overall flow of a mobility management method according to an embodiment of the present disclosure.
  • step 401 the UE (i.e., terminal device) reports the layer 3 measurement results to the current serving gNB-CU.
  • the serving gNB-CU determines to trigger the Layer 1/Layer 2 Triggered Mobility (LTM) process.
  • LTM Layer 1/Layer 2 Triggered Mobility
  • the serving gNB-CU sends a UE Context Modification Request to the DU to which the candidate cell belongs.
  • the UE Context Modification Request includes, for example, the candidate cell ID.
  • the UE Context Modification Request is sent to another CU.
  • the DU to which the candidate cell belongs sends a UE Context Modification Response to the serving gNB-CU.
  • the UE Context Modification Response may include, for example, candidate cell-related configurations and measurement configurations.
  • the serving gNB-CU sends a radio resource control (RRC) reconfiguration message to the UE via the serving gNB-DU.
  • RRC radio resource control
  • the RRC reconfiguration message includes, for example, the measurement configuration information and execution condition information described above with reference to Figures 2 and 3.
  • the UE evaluates LTM execution conditions. For example, based at least on the measurement configuration information, the UE obtains measurement information for one or more cells.
  • the measurement information may include a measured value of reference signal received power (RSRP), a measured value of reference signal received quality (RSRQ), a measured value of signal-to-interference-and-noise ratio (SINR), channel quality, signal quality, etc.
  • RSRP reference signal received power
  • RSRQ measured value of reference signal received quality
  • SINR signal-to-interference-and-noise ratio
  • the execution condition information includes first execution condition information related to layer 1 measurements and/or second execution condition information related to layer 3 measurements.
  • Access to one or more target cells from the one or more cells may be determined based on the measurement information and the first execution condition information.
  • handover execution i.e., access to one or more target cells from the one or more cells
  • the determination to access one or more target cells from the one or more cells based on the measurement information, the first execution condition information, and the second execution condition information may be to determine, if the measurement information satisfies the second execution condition information, whether the measurement information satisfies the first execution condition information, and, if the measurement information satisfies the first execution condition information, to determine whether handover execution, i.e., access to one or more target cells from the one or more cells.
  • the measurement information satisfies the second execution condition information as a prerequisite for further determining whether the measurement information satisfies the first execution condition information.
  • it is determined to access one or more target cells in the one or more cells.
  • determining to access one or more target cells in the one or more cells may be determining to access one or more target cells in the one or more cells when the measurement information satisfies the first execution condition information and the second execution condition information.
  • first execution condition information and the second execution condition are simultaneously met, it is determined to perform handover, that is, to access one or more target cells in the one or more cells.
  • the first execution condition information and the second execution condition information are the same as those described above with reference to FIG2 , and their repeated description will be omitted here.
  • step 408 the UE performs LTM cell handover and accesses one or more target cells based on the type and index of the one or more target cells.
  • the configuration corresponding to the target cell is applied to access the determined one or more target cells.
  • the terminal device performs partial MAC reconstruction.
  • the target cell is considered to be the serving CU and requires both inter-DU and intra-CU handover.
  • the terminal device performs a Radio Link Control (RLC) reset and a partial or full MAC re-establishment.
  • RLC Radio Link Control
  • the target cell that meets the conditions is determined not to be a serving CU and an inter-CU handover is required. In this case, an RLC reset, partial or full MAC reestablishment, and a Packet Data Convergence Protocol (PDCP) reset are performed.
  • PDCP Packet Data Convergence Protocol
  • FIG. 5 is a block diagram illustrating a mobility management device according to an embodiment of the present disclosure.
  • the mobility management device 500 shown in Figure 5 can implement the mobility management method described above.
  • the mobility management device 500 can be implemented in various ways, using hardware alone, software alone, or a combination thereof, and the present disclosure is not limited to any of these.
  • the mobility management device 500 according to an embodiment of the present disclosure can be deployed in the terminal devices 11 and 12 described above. Alternatively, the mobility management device 500 can be the terminal devices 11 and 12 described above.
  • the mobility management device 500 includes a receiving unit 501 , an acquiring unit 502 , and a determining unit 503 .
  • the receiving unit 501 is configured to receive a mobility management message, where the mobility management message includes at least measurement configuration information and execution condition information of one or more cells.
  • the acquiring unit 502 is configured to acquire measurement information of one or more cells based at least on the measurement configuration information.
  • the determining unit 503 is configured to determine to access one or more target cells among the one or more cells based on the measurement information and the execution condition information.
  • the execution condition information includes at least one of first execution condition information related to layer 1 measurement and second execution condition information related to layer 3 measurement.
  • the determining unit 503 is configured to perform at least one of the following: determining to access one or more target cells among the one or more cells based on the measurement information and the first execution condition information; and determining to access one or more target cells among the one or more cells based on the measurement information, the first execution condition information, and the second execution condition information.
  • the determination unit 503 is used to perform at least one of the following: in response to the measurement information satisfying the first execution condition information and the second execution condition information, determining to access one or more target cells among the one or more cells; and in response to the measurement information satisfying the second execution condition information, judging whether the measurement information satisfies the first execution condition information, and in response to the measurement information satisfying the first execution condition information, determining to access one or more target cells among the one or more cells.
  • the execution condition information includes multiple execution condition information corresponding to multiple cell types, including primary cell, primary secondary cell, and secondary cell, and the execution condition information also includes measurement bias information corresponding to the multiple cell types.
  • the mobility management device 500 may further include an access unit (not shown) configured to access one or more target cells based on the type and index of the one or more target cells.
  • an access unit (not shown) configured to access one or more target cells based on the type and index of the one or more target cells.
  • FIG6 is a block diagram further illustrating a mobility management apparatus according to an embodiment of the present disclosure.
  • the mobility management apparatus 600 shown in FIG6 is capable of implementing the mobility management method described above.
  • the mobility management apparatus 600 can be implemented in various ways, using hardware alone, software alone, or a combination thereof, and the present disclosure is not limited to any of these.
  • the mobility management apparatus 600 according to an embodiment of the present disclosure can be deployed in the network devices 21 and 22 described above. Alternatively, the mobility management apparatus 600 can be the network devices 21 and 22 described above.
  • the mobility management device 600 includes a sending unit 601 .
  • the sending unit 601 is configured to send a mobility management message.
  • the mobility management message includes at least measurement configuration information of one or more cells and execution condition information, wherein the measurement configuration information is used for the terminal device to obtain measurement information of the one or more cells and determine one or more target cells to access from the one or more cells based on the measurement information and the execution condition information.
  • the terminal device 700 includes a processor 701, a memory 702, and a communication interface 703.
  • the processor 701, the memory 702, and the communication interface 703 are interconnected via a bus 704.
  • the communication interface 703 is used to perform wireless communication with the network device, and the communication interface 703 may be a communication chip.
  • the memory 702 is used to store computer-readable instructions.
  • the memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile memory may include, for example, random access memory (RAM) and/or cache memory.
  • the non-volatile memory may include, for example, read-only memory (ROM), a hard disk, a flash memory, an optical disk, a magnetic disk, etc.
  • the processor 701 is configured to execute computer-readable instructions, so that the terminal device 700 executes the mobility management method described above.
  • the network device 800 includes a processor 801, a memory 802, and a communication interface 803.
  • the processor 801, the memory 802, and the communication interface 803 are interconnected via a bus 804.
  • the communication interface 803 is used to perform wireless communication with the terminal device, and the communication interface 803 can be a communication chip.
  • the memory 802 is used to store computer-readable instructions.
  • the memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile memory may include, for example, a random access memory (RAM) and/or a cache memory.
  • the non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, an optical disk, a magnetic disk, etc.
  • the processor 801 is configured to execute computer-readable instructions, so that the network device 800 executes the mobility management method described above.
  • FIG9 is a schematic diagram illustrating a computer-readable storage medium according to an embodiment of the present disclosure.
  • a computer-readable storage medium 900 according to an embodiment of the present disclosure has computer-readable instructions 901 stored thereon.
  • the computer-readable storage medium includes, but is not limited to, volatile memory and/or non-volatile memory.
  • the volatile memory may include, for example, random access memory (RAM) and/or cache memory.
  • the non-volatile memory may include, for example, read-only memory (ROM), a hard disk, a flash memory, an optical disk, a magnetic disk, etc.
  • the terminal device triggers the cell switching based on mobility management, which reduces the switching delay and improves the robustness. While not increasing the number of candidate cells, the number of different types of cell candidates is increased, and without increasing the signaling transmission volume, more accurate cell type matching is achieved. In addition, for specific cell types and cell events, corresponding measurement biases are set to further optimize the selection of target cells.
  • each component or each step can be decomposed and/or recombined. Such decomposition and/or recombination should be regarded as equivalent solutions of the present disclosure.

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Abstract

本公开涉及无线通信技术领域，尤其是提供一种移动性管理方法、装置、终端设备、网络设备和存储介质。所述方法包括：接收移动性管理消息，移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息；至少基于测量配置信息，获取一个或多个小区的测量信息；以及基于测量信息和执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。由终端设备触发基于移动性管理的小区切换，降低了切换的延时并且提升了鲁棒性。

Description

移动性管理方法、装置、终端设备、网络设备和存储介质
相关申请的交叉引用
本公开基于申请号为202410101474.9、申请日为2024年01月24日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本公开作为参考。
技术领域
本公开涉及移动通信技术领域，尤其是涉及一种移动性管理方法、装置、终端设备、网络设备和存储介质。
背景技术
在移动通信技术领域中，正在使用网络服务的终端设备可能面临因移动性需求、无线传输业务负荷量调整、激活操作维护、设备故障、小区负载等因素而导致当前网络服务中断或质量下降的问题。现有方案中引入了基于层1(L1)/层2(L2)信令的跨小区移动性机制，即基于L1/L2信令完成切换以降低时延。例如，终端设备根据网络侧的配置会对已配置的参考信号进行L1测量，再根据上报配置，向网络侧上报N个小区的K个参考信号的索引和/或L1-参考信号接收功率(L1-RSRP)。也就是说，基于测得的信号情况，终端设备上报N×K个测量结果。
虽然L1/L2的测量上报与后续的MAC CE命令已经降低了时延，然而在FR2“毫米波”频带的情况下，信道状态变化更快，需要进一步降低切换延时，增加切换的鲁棒性。
发明内容
鉴于上述问题，本公开提供了一种移动性管理方法、装置、终端设备、网络设备和存储介质。
根据本公开的第一方面，提供了一种移动性管理方法，由终端设备执行，包括：接收移动性管理消息，移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息；至少基于测量配置信息，获取一个或多个小区的测量信息；以及基于测量信息和执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。
在一些实施例中，执行条件信息包括：与层1测量相关的第一执行条件信息和与层3测量相关的第二执行条件信息中的至少一个，基于测量信息和执行条件信息，确定接入一个或多个小区中一个或多个包括以下中的至少一个：基于测量信息和第一执行条件信息，确定接入一个或多个小区中的一个或多个目标小区；和基于测量信息、第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。
在一些实施例中，基于测量信息、第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区包括以下中的至少一个：响应于测量信息满足第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区；和响应于测量信息满足第二执行条件信息，判断测量信息是否满足第一执行条件信息，并且响应于测量信息满足第一执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。
在一些实施例中，执行条件信息包括对应于多个小区类型的多个执行条件信息，多个小区类型包括主小区、主辅小区、辅小区，并且执行条件信息还包括对应于多个小区类型的测量偏置信息。
在一些实施例中，所述方法还包括：基于一个或多个目标小区的类型和索引，接入一个或多个目标小区。
根据本公开的第二方面，提供了一种移动性管理方法，由网络设备执行，包括：发送移动性管理消息，移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息，其中测量配置信息用于供终端设备获取所述一个或多个小区的测量信息、并基于测量信息和执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。
根据本公开的第三方面，提供了一种移动性管理装置，包括：接收单元，被配置为接收移动性管理消息，移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息；获取单元，被配置为至少基于测量配置信息，获取一个或多个小区的测量信息；以及确定单元，被配置为基于测量信息和执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。
根据本公开的第四方面，提供了一种移动性管理装置，包括：发送单元，被配置为发送移动性管理消息，移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息，其中测量配置信息用于供终端设备获取所述一个或多个小区的测量信息、并基于测量信息和执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。
根据本公开的第五方面，提供了一种终端设备，包括：通信接口，被配置为与网络设备执行无线通信；存储器，用于存储计算机可读指令；以及处理器，用于运行计算机可读指令，使得终端设备执行如上第一方面所述的移动性管理方法。
根据本公开的第六方面，提供了一种网络设备，包括：通信接口，被配置为与终端设备执行无线通信；存储器，用于存储计算机可读指令；以及处理器，用于运行计算机可读指令，使得网络设备执行如上第二方面所述的移动性管理方法。
根据本公开的第七方面，提供了一种非瞬时性计算机可读存储介质，用于存储计算机可读指令，当计算机可读指令由处理器执行时，使得处理器执行如上第一方面所述的移动性管理方法。
根据本公开实施例提供的技术方案，由终端设备触发基于移动性管理的小区切换，降低了切换的延时并且提升了鲁棒性。在不增加候选小区数目的同时，还增加了不同类型小区候选的数量，而且在不增加信令传输量的情况下，实现了更精确的小区类型匹配。此外，对于特定的小区类型和小区事件，设置相应的测量偏置，进一步优化了目标小区的选择。
要理解的是，前面的一般描述和下面的详细描述两者都是示例性的，并且意图在于提供要求保护的技术的进一步说明。
附图说明
通过结合附图对本公开实施例进行更详细的描述，本公开的上述以及其它目的、特征和优势将变得更加明显。附图用来提供对本公开实施例的进一步理解，并且构成说明书的一部分，与本公开实施例一起用于解释本公开，并不构成对本公开的限制。在附图中，相同的参考标号通常代表相同部件或步骤。
图1是图示应用根据本公开实施例的移动性管理方法的通信系统的示意图。
图2是图示根据本公开实施例的移动性管理方法的流程图。
图3是进一步图示根据本公开实施例的移动性管理方法的流程图。
图4是图示根据本公开实施例的移动性管理方法的整体流程示意图。
图5是图示根据本公开实施例的移动性管理装置的框图。
图6是进一步图示根据本公开实施例的移动性管理装置的框图。
图7是图示根据本公开实施例的终端设备的硬件框图。
图8是图示根据本公开实施例的网络设备的硬件框图。
图9是图示根据本公开的实施例的计算机可读存储介质的示意图。
具体实施方式
为了使得本公开的目的、技术方案和优点更为明显，下面将参照附图详细描述根据本公开的示例实施例。显然，所描述的实施例仅仅是本公开的一部分实施例，而不是本公开的全部实施例，应理解，本公开不受这里描述的示例实施例的限制。
首先，参照图1描述应用根据本公开实施例的移动性管理方法的通信系统。本申请实施例的技术方案可以应用于各种无线通信系统，例如：全球移动通信(GSM)系统、码分多址(CDMA)系统、宽带码分多址(WCDMA)系统、通用分组无线业务(GPRS)、长期演进(LTE)系统、先进的长期演进(LTE-A)系统、新无线(NR)系统、NR系统的演进系统、非授权频谱上的LTE(LTE-U)系统、非授权频谱上的NR(NR-U)系统、非地面通信网络(NTN)系统、通用移动通信系统(UMTS)、无线局域网(WLAN)系统、无线保真(WiFi)系统、第五代通信(5G)系统或者其他通信系统等。容易理解的是，本公开实施例描述的通信系统架构以及业务场景是为了更加清楚地说明本公开实施例的技术方案，并不构成对本公开实施例提供的技术方案的限定，本领域普通技术人员可以理解，随着网络架构的演变和新业务场景的出现，本公开实施例提供的技术方案对于类似的技术问题同样适用。
如图1所示，通信系统1包括三个交互域：终端设备(例如，终端设备11、12)、接入网20(例如，包括网络设备21、22)、核心网30(例如，包括核心网设备31、32)。借助于通信系统1，终端设备11、12能够执行与外部数据网络(例如，但不限于互联网)的数据通信。
终端设备11、12可以是用户设备(UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、智能终端、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、中继设备、车载设备、可穿戴设备、下一代通信系统例如NR网络中的终端或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端等，对此不作具体限定。
网络设备21、22可以是用于与终端设备11、12之间进行通信的设备，网络设备21、22可以是GSM或CDMA通信系统中的基站(base transceiver station，BTS)、WCDMA通信系统中的基站(nodeB，NB)、LTE通信系统中的演进型基站(evolutional node B，eNB或eNodeB)、NR通信系统中的下一代演进型基站(next generation evolved node B，ng-eNB)、NR通信系统中的下一代基站(next generation node B，gNB)。另外，网络设备21、22还可以是无线局域网WLAN中的接入点(access point，AP)、中继站、未来演进的PLMN网络中的网络设备或者NTN网络中的网络设备等。需要说明的是，在一些网络部署中，网络设备可以是一个独立的节点以实现上述基站的所有功能；可以包括集中式单元(CU)和分布式单元(DU)，例如gNB-CU和gNB-DU，以及还可以包括有源天线单元(active antenna unit，AAU)。其中，CU可以实现网络设备的部分功能，而DU可以实现网络设备的部分功能。比如，CU负责处理非实时协议和服务，实现无线资源控制(RRC)层、服务数据适配(SDAP)层、分组数据汇聚(PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(RLC)层、媒体接入控制(MAC)层和物理(PHY)层的功能。另外，AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者由PHY层的信息转变而来，因此在该网络部署下，高层信令(RRC)可以认为是由DU发送的，或者由DU和AAU发送的。可以理解的是，网络设备21、22可以包括CU、DU、AAU中的至少一个。
核心网设备31、32的功能主要是提供用户连接、对用户的管理以及对业务完成承载，作为承载网络提供到外部网络的接口。例如，5G NR系统中的核心网设备可以包括接入和移动性管理功能(Access and Mobility Management Function，AMF)实体、用户面功能(User Plane Function，UPF)实体和会话管理功能(Session Management Function，SMF)实体等设备。
在图1所示的示例中，接入网设备21、22与核心网设备31、32之间通过某种空中技术相互通信，例如5G NR系统中的NG接口。接入网设备21、22与终端设备11、12之间通过某种空中技术互相通信，例如Uu接口。
以下将进一步参照附图描述根据本公开实施例的移动性管理方法。根据本公开实施例的移动性管理方法可以由如图1所示的终端设备11、12和接入网设备21、22单独或联合执行。
图2是图示根据本公开实施例的移动性管理方法的流程图。该方法例如由参照图1描述的终端设备11、12执行。该方法包括以下步骤S201-S204。
在步骤S201中，接收移动性管理消息。
在本公开的实施例中，终端设备从网络设备接收移动性管理消息。具体地，终端设备从当前的服务gNB-CU接收下发的移动性管理消息。具体地，移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息。进一步地，移动性管理消息还包括信道状态信息报告配置信息。
一个或多个小区可以包括一个或多个当前服务小区、服务小区组、候选小区以及候选小区组。例如，在双连接下，终端设备可以接入两个小区组，分别为主小区组(MCG)和辅小区组(SCG)。在MCG中，可能会有很多个小区，其中有一个用于发起初始接入的小区，被称为主小区(PCell)。MCG中还包括辅小区(SCell)。相应地，SCG中包括主辅小区(PSCell)和辅小区(SCell)。MCG中的PCell和MCG中的SCell通过载波聚合(CA)联合在一起。同样地，SCG中的PSCell和SCG中的SCell也通过载波聚合(CA)联合在一起。此外，如上所述，一个或多个小区还可以是服务小区和/或候选小区的CU和DU。一个或多个小区的测量配置信息携带/包括其移动性测量配置参数，诸如小区索引、CU索引、DU索引、小区组索引\列表。
信道状态信息报告配置信息包括第一信道状态信息报告配置信息(CSI Report Configuration 1)和第二信道状态信息报告配置信息(CSI Report Configuration 2)。第一信道状态信息报告配置信息指示测量参考信号为服务小区的参考信号，第二信道状态信息报告配置信息指示测量参考信号为候选小区的参考信号。
执行条件信息用于衡量一个或多个小区的测量结果，以便确定是否接入一个或多个小区中的一个或多个目标小区。执行条件信息包括对应于多个小区类型(如PCell、PSCell、Scell)的测量偏置信息。也就是说，在不增加候选小区数目的同时，增加了不同类型的候选小区的数量。
在步骤S202中，至少基于测量配置信息，获取一个或多个小区的测量信息。在本公开的一些实施例中，测量信息可以包括参考信号接收功率(RSRP)的测量值、参考信号接收质量(RSRQ)的测量值、信干噪比(SINR)的测量值、信道质量、信号质量等。
在步骤S203中，基于测量信息和执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。
在本公开的实施例中，执行条件信息包括与层1测量相关的第一执行条件信息和/或与层3测量相关的第二执行条件信息。可以基于测量信息和第一执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。也就是说，根据第一执行条件信息就直接确定执行切换，即接入一个或多个小区中的一个或多个目标小区。
在本公开的一个示例实施例中，测量信息例如为参考信号接收功率(RSRP)的测量值。第一执行条件信息可以为以下第一组条件、第二组条件、第三组条件中的至少一条。
例如，第一组条件可以是：
最近N次测量L1-RSRP(c)-L1-RSRP(s)≥Th1；
预定时间内L1-RSRP(c)-L1-RSRP(s)≥Th2；
其中L1-RSRP(s)为在测量参考信号为服务小区的参考信号的情况下，测量参考信号的L1-RSRP中最大的L1-RSRP，L1-RSRP(c)为在测量参考信号为候选小区的参考信号的情况下，测量参考信号的L1-RSRP中最大的L1-RSRP。Th1和Th2为预定阈值量，Th1和Th2可以相同或者不同。
第一组条件指示候选小区质量好于当前服务小区质量一定程度。
例如，第二组条件可以是：
最近N次L1-RSRP(c)≥Th3；
预定时间内L1-RSRP(c)≥Th4；
第二组条件指示候选小区质量好于一定程度。
例如，第三组条件可以是：
L1-RSRP(s)t1-L1-RSRP(s)t2≥Th5；
第三组条件指示服务小区质量骤降。
可替代地，基于测量信息、第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区还可以是在测量信息满足第二执行条件信息的情况下，判断所述测量信息是否满足第一执行条件信息，并且在测量信息满足第一执行条件信息的情况下，确定执行切换，即接入一个或多个小区中的一个或多个目标小区。也就是说，测量信息满足第二执行条件信息作为是否进一步判断测量信息满足第一执行条件信息的前提条件。
在本公开的一个示例实施例中，第一执行条件信息可以为如上所述第一组条件、第二组条件、第三组条件中的至少一条。第二执行条件信息可以是测量事件A3、A4、A5、B1中的任一个。例如，测量事件A3指示同频/异频候选小区质量高于服务小区质量；A4指示异频候选小区质量高于一定阈值量；A5指示服务小区质量低于一定阈值量并且候选小区质量高于一定阈值量；B1指示异系统候选小区质量高于一定阈值量。
可替代地，基于测量信息、第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。更进一步的，基于测量信息、第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区可以是在测量信息满足第一执行条件信息和第二执行条件信息的情况下，确定接入一个或多个小区中的一个或多个目标小区。也就是说，同时满足第一执行条件信息和第二执行条件时，确定执行切换，即接入一个或多个小区中的一个或多个目标小区。
在本公开的一个示例实施例中，第一执行条件信息可以为如上所述第一组条件、第二组条件、第三组条件中的至少一条，和第二执行条件信息可以为如上所述测量事件A3、A4、A5、B1中的至少一条。
在本公开的上述实施例中，基于满足第二执行条件信息的测量信息触发第一执行条件信息的测量及条件衡量，进一步保证移动性切换的鲁棒性。
在本公开进一步的示例实施例中，执行条件信息还包括对应于多个小区类型和/或小区事件的测量偏置信息。在基于测量信息和执行条件信息进行衡量以执行切换时，测量信息、测量偏置信息和上述执行条件信息中的阈值量一起执行衡量过程。
例如，同一候选小区可以对应于不同类型(即，PCell、PSCell、Scell中的一个或多个)，则可以针对不同类型设置不同的测量偏置Offset_type1、Offset_type2和Offset_type3。此外，如果候选小区已经存在定时提前(TA)，则优先选择该小区；如果候选小区已经完成下行同步，则优先选择该小区；如果候选小区已经完成跟踪参考信号(TRS)跟踪，则优先选择该小区。对于上述特定小区事件，可以设置不同的测量偏置Offset_event1、Offset_event2和Offset_event3。
例如，对于主小区，当前服务主小区的测量结果为Mp、当前服务主小区的类型偏置Offset_type1p、当前服务主小区的事件偏置Offset_event1p，候选小区的测量结果为Mn、候选的类型偏置Offset_type1n、候选小区的事件偏置Offset_event2n，当满足Mn+Offset_type1n+Offset_event2n＞Mp+Offset_type1p+Offset_event1p，则确定将服务主小区切换为该候选小区。
在步骤S204中，基于一个或多个目标小区的类型和索引，接入一个或多个目标小区。
在本公开的一个示例实施例中，根据在步骤S203中的确定结果，即接入一个或多个目标小区的小区类型(PCell、PSCell、Scell)，应用目标小区对应的配置，以便接入确定的一个或多个目标小区。
例如，如果目标小区对应执行条件信息中的CU、DU索引均与当前服务小区一致，则判断满足条件的小区属于服务DU，需要执行DU内切换和/或CU内切换。在此情况下，终端设备执行部分MAC重建。
如果目标小区对应执行条件中的CU索引与当前服务小区一致、而DU索引与当前服务小区不一致，则判断满足条件的小区属于服务CU，需要执行DU间切换和CU内切换。在此情况下，终端设备执行无线链路层控制协议(RLC)重置以及部分或全部MAC重建。
如果目标小区对应执行条件中的CU索引与当前服务小区不一致，则判断满足条件的目标小区不属于服务CU，需要执行CU间切换。在此情况下，执行RLC重置、部分或全部MAC重建以及分组数据汇聚协议(PDCP)重置。
通过参照图2描述的本公开所提供的移动性管理方法，由终端设备触发基于移动性管理的小区切换，降低了切换的延时并且提升了鲁棒性。在不增加候选小区数目的同时，增加了不同类型的候选小区的数量，而且在不增加信令传输量的情况下，实现了更精确的小区类型匹配。此外，对于特定的小区类型和小区事件，设置相应的测量偏置，进一步优化了目标小区的选择。
图3是进一步图示根据本公开实施例的移动性管理方法的流程图。该方法例如由参照图1描述的网络设备21、22执行。该方法包括以下步骤S301。
在步骤S301中，发送移动性管理消息。
在本公开的实施例中，网络设备向终端设备发送移动性管理消息。具体地，当前服务gNB-CU向终端设备下发移动性管理消息。具体地，移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息。进一步地，移动性管理消息还包括信道状态信息报告配置信息。
一个或多个小区可以包括一个或多个当前服务小区、服务小区组、候选小区以及候选小区组。例如，在双连接下，终端设备可以接入两个小区组，分别为主小区组(MCG)和辅小区组(SCG)。在MCG中，可能会有很多个小区，其中有一个用于发起初始接入的小区，被称为主小区(PCell)。MCG中还包括辅小区(SCell)。相应地，SCG中包括主辅小区(PSCell)和辅小区(SCell)。MCG中的PCell和MCG中的SCell通过载波聚合(CA)联合在一起。同样地，SCG中的PSCell和SCG中的SCell也通过载波聚合(CA)联合在一起。此外，如上所述，一个或多个小区还可以是服务小区和/或候选小区的CU和DU。一个或多个小区的测量配置信息携带/包括其移动性测量配置参数，诸如小区索引、CU索引、DU索引、小区组索引\列表。
信道状态信息报告配置信息包括第一信道状态信息报告配置信息(CSI Report Configuration 1)和第二信道状态信息报告配置信息(CSI Report Configuration 2)。第一信道状态信息报告配置信息指示测量参考信号为服务小区的参考信号，第二信道状态信息报告配置信息指示测量参考信号为候选小区的参考信号。
执行条件信息用于衡量一个或多个小区的测量结果，以便确定是否接入一个或多个小区中的一个或多个目标小区。执行条件信息包括对应于多个小区类型(如PCell、PSCell、Scell)的测量偏置信息。也就是说，在不增加候选小区数目的同时，增加了不同类型的候选小区的数量。
图4是图示根据本公开实施例的移动性管理方法的整体流程示意图。
如图4所示，在步骤401中，UE(即，终端设备)向当前服务gNB-CU报告层3测量结果。
在步骤402中，服务gNB-CU确定触发层1/层2触发的移动性(Layer 1/Layer 2Triggered Mobility，LTM)过程。
在步骤403中，服务gNB-CU向候选小区所属DU发送UE上下文修改请求，该UE上下文修改请求例如包括候选小区ID。或者，在候选小区所属DU不是同一CU下属DU的情况下，向其他CU发送UE上下文修改请求。
在步骤404中，候选小区所属DU向服务gNB-CU发送UE上下文修改响应。该UE上下文修改响应例如包括候选小区相关配置、测量配置等。
在步骤405和406中，服务gNB-CU经由服务gNB-DU向UE发送无线资源控制(RRC)重配消息。该RRC重配消息中例如包括如上参照图2和图3描述的测量配置信息以及执行条件信息。
在步骤S407中，UE评估LTM执行条件。例如，UE至少基于测量配置信息，获取一个或多个小区的测量信息。测量信息可以包括参考信号接收功率(RSRP)的测量值、参考信号接收质量(RSRQ)的测量值、信干噪比(SINR)的测量值、信道质量、信号质量等。进一步地，基于测量信息和执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。在本公开的实施例中，执行条件信息包括与层1测量相关的第一执行条件信息和/或与层3测量相关的第二执行条件信息。可以基于测量信息和第一执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。也就是说，根据第一执行条件信息就直接确定执行切换，即接入一个或多个小区中的一个或多个目标小区。可替代地，基于测量信息、第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区还可以是在测量信息满足第二执行条件信息的情况下，进一步判断所述测量信息是否满足第一执行条件信息，并且在测量信息满足第一执行条件信息的情况下，确定执行切换，即接入一个或多个小区中的一个或多个目标小区。也就是说，测量信息满足第二执行条件信息作为是否进一步判断测量信息满足第一执行条件信息的前提条件。可替代地，基于测量信息、第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。更进一步的，基于测量信息、第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区可以是在测量信息满足第一执行条件信息和第二执行条件信息的情况下，确定接入一个或多个小区中的一个或多个目标小区。也就是说，同时满足第一执行条件信息和第二执行条件时，确定执行切换，即接入一个或多个小区中的一个或多个目标小区。第一执行条件信息和第二执行条件信息与如上参照图2描述的相同，在此将省略其重复描述。
在步骤408中，UE执行LTM小区切换。基于一个或多个目标小区的类型和索引，接入一个或多个目标小区。
在本公开的一个示例实施例中，根据在步骤407中的确定结果，即接入一个或多个目标小区的小区类型(PCell、PSCell、Scell)，应用目标小区对应的配置，以便接入确定的一个或多个目标小区。
例如，如果目标小区对应执行条件信息中的CU、DU索引均与当前服务小区一致，则判断满足条件的小区属于服务DU，需要执行DU内切换和/或CU内切换。在此情况下，终端设备执行部分MAC重建。
如果目标小区对应执行条件中的CU索引与当前服务小区一致、而DU索引与当前服务小区不一致，则判断满足条件的小区属于服务CU，需要执行DU间切换和CU内切换。在此情况下，终端设备执行无线链路层控制协议(RLC)重置以及部分或全部MAC重建。
如果目标小区对应执行条件中的CU索引与当前服务小区不一致，则判断满足条件的目标小区不属于服务CU，需要执行CU间切换。在此情况下，执行RLC重置、部分或全部MAC重建以及分组数据汇聚协议(PDCP)重置。
图5是图示根据本公开实施例的移动性管理装置的框图。图5所示的移动性管理装置500能够实现如上所述的移动性管理方法。移动性管理装置500可以单独由硬件、单独由软件或者由其组合以各种方式实现，并且本公开不限于它们的任何一个。根据本公开实施例的移动性管理装置500可以部署在如上所述的终端设备11、12中，可替代地，移动性管理装置500可以是如上所述的终端设备11、12。
如图5所示，移动性管理装置500包括接收单元501、获取单元502和确定单元503。
接收单元501被配置为接收移动性管理消息，移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息。
获取单元502被配置为至少基于测量配置信息，获取一个或多个小区的测量信息。
确定单元503被配置为基于测量信息和执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。
在一些实施例中，执行条件信息包括：与层1测量相关的第一执行条件信息和与层3测量相关的第二执行条件信息中的至少一个。确定单元503用于执行以下中的至少一个：基于测量信息和第一执行条件信息，确定接入一个或多个小区中的一个或多个目标小区；和基于测量信息、第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。
更具体地，在基于测量信息、第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区的情况下，确定单元503用于执行以下中的至少一个：响应于测量信息满足所述第一执行条件信息和第二执行条件信息，确定接入一个或多个小区中的一个或多个目标小区；和响应于测量信息满足第二执行条件信息，判断测量信息是否满足第一执行条件信息，并且响应于测量信息满足第一执行条件信息，确定接入一个或多个小区中的一个或多个目标小区。
在一些实施例中，执行条件信息包括对应于多个小区类型的多个执行条件信息，述多个小区类型包括主小区、主辅小区、辅小区，并且所述执行条件信息还包括对应于所述多个小区类型的测量偏置信息。
此外，移动性管理装置500还可以包括接入单元(未示出)，被配置为基于一个或多个目标小区的类型和索引，接入一个或多个目标小区。
图6是进一步图示根据本公开实施例的移动性管理装置的框图。图6所示的移动性管理装置600能够实现如上所述的移动性管理方法。移动性管理装置600可以单独由硬件、单独由软件或者由其组合以各种方式实现，并且本公开不限于它们的任何一个。根据本公开实施例的移动性管理装置600可以部署在如上所述的网络设备21、22中，可替代地，移动性管理装置600可以是如上所述的网络设备21、22。
如图6所示，移动性管理装置600包括发送单元601。
发送单元601被配置为发送移动性管理消息。移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息，其中测量配置信息用于供终端设备获取所述一个或多个小区的测量信息、并基于所述测量信息和所述执行条件信息，确定接入所述一个或多个小区中的一个或多个目标小区。
图7是图示根据本公开实施例的终端设备的硬件框图。终端设备700包括处理器701、存储器702和通信接口703。处理器701、存储器702和通信接口703通过总线704相互连接。
通信接口703用于与网络设备执行无线通信，通信接口703可以是一块通信芯片。
存储器702用于存储计算机可读指令，存储器702可以由任何类型的易失性或非易失性存储设备或者它们的组合实现。所述易失性存储器例如可以包括随机存取存储器(RAM)和/或高速缓冲存储器(cache)等。所述非易失性存储器例如可以包括只读存储器(ROM)、硬盘、闪存、光盘、磁盘等。
处理器701用于运行计算机可读指令，使得终端设备700执行如上所述的移动性管理方法。
图8是图示根据本公开实施例的网络设备的硬件框图。网络设备800包括处理器801、存储器802和通信接口803。处理器801、存储器802和通信接口803通过总线804相互连接。
通信接口803用于与终端设备执行无线通信，通信接口803可以是一块通信芯片。
存储器802用于存储计算机可读指令，存储器802可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，所述易失性存储器例如可以包括随机存取存储器(RAM)和/或高速缓冲存储器(cache)等。所述非易失性存储器例如可以包括只读存储器(ROM)、硬盘、闪存、光盘、磁盘等。
处理器801用于运行计算机可读指令，使得网络设备800执行如上所述的移动性管理方法。
图9是图示根据本公开的实施例的计算机可读存储介质的示意图。如图9所示，根据本公开实施例的计算机可读存储介质900其上存储有计算机可读指令901。当所述计算机可读指令901由处理器运行时，执行参照以上附图描述的移动性管理方法。所述计算机可读存储介质包括但不限于例如易失性存储器和/或非易失性存储器。所述易失性存储器例如可以包括随机存取存储器(RAM)和/或高速缓冲存储器(cache)等。所述非易失性存储器例如可以包括只读存储器(ROM)、硬盘、闪存、光盘、磁盘等。
以上，参照附图描述了根据本公开实施例的移动性管理方法、装置、终端设备、网络设备和存储介质。根据本公开实施例的移动性管理方法，由终端设备触发基于移动性管理的小区切换，降低了切换的延时并且提升了鲁棒性。在不增加候选小区数目的同时，增加了不同类型小区候选的数量，也不增加信令传输量的情况下，实现了更精确的小区类型匹配。此外，对于特定的小区类型和小区事件，设置相应的测量偏置，进一步优化了目标小区的选择。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本公开的范围。
以上结合具体实施例描述了本公开的基本原理，但是，需要指出的是，在本公开中提及的优点、优势、效果等仅是示例而非限制，不能认为这些优点、优势、效果等是本公开的各个实施例必须具备的。另外，上述公开的具体细节仅是为了示例的作用和便于理解的作用，而非限制，上述细节并不限制本公开为必须采用上述具体的细节来实现。
本公开中涉及的器件、装置、设备、系统的方框图仅作为例示性的例子并且不意图要求或暗示必须按照方框图示出的方式进行连接、布置、配置。如本领域技术人员将认识到的，可以按任意方式连接、布置、配置这些器件、装置、设备、系统。诸如“包括”、“包含”、“具有”等等的词语是开放性词汇，指“包括但不限于”，且可与其互换使用。这里所使用的词汇“或”和“和”指词汇“和/或”，且可与其互换使用，除非上下文明确指示不是如此。这里所使用的词汇“诸如”指词组“诸如但不限于”，且可与其互换使用。
另外，如在此使用的，在以“至少一个”开始的项的列举中使用的“或”指示分离的列举，以便例如“A、B或C的至少一个”的列举意味着A或B或C，或AB或AC或BC，或ABC(即A和B和C)。此外，措辞“示例的”不意味着描述的例子是优选的或者比其他例子更好。
还需要指出的是，在本公开的系统和方法中，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。
可以不脱离由所附权利要求定义的教导的技术而进行对在此所述的技术的各种改变、替换和更改。此外，本公开的权利要求的范围不限于以上所述的处理、机器、制造、事件的组成、手段、方法和动作的具体方面。可以利用与在此所述的相应方面进行基本相同的功能或者实现基本相同的结果的当前存在的或者稍后要开发的处理、机器、制造、事件的组成、手段、方法或动作。因而，所附权利要求包括在其范围内的这样的处理、机器、制造、事件的组成、手段、方法或动作。
提供所公开的方面的以上描述以使本领域的任何技术人员能够做出或者使用本公开。对这些方面的各种修改对于本领域技术人员而言是非常显而易见的，并且在此定义的一般原理可以应用于其他方面而不脱离本公开的范围。因此，本公开不意图被限制到在此示出的方面，而是按照与在此公开的原理和新颖的特征一致的最宽范围。
为了例示和描述的目的已经给出了以上描述。此外，此描述不意图将本公开的实施例限制到在此公开的形式。尽管以上已经讨论了多个示例方面和实施例，但是本领域技术人员将认识到其某些变型、修改、改变、添加和子组合。

Claims (15)

  1. 一种移动性管理方法，由终端设备执行，包括：
    接收移动性管理消息，所述移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息；
    至少基于所述测量配置信息，获取所述一个或多个小区的测量信息；以及
    基于所述测量信息和所述执行条件信息，确定接入所述一个或多个小区中的一个或多个目标小区。
  2. 如权利要求1所述的移动性管理方法，其中，所述执行条件信息包括：与层1测量相关的第一执行条件信息和与层3测量相关的第二执行条件信息中的至少一个，
    其中所述基于所述测量信息和所述执行条件信息，确定接入所述一个或多个小区中一个或多个包括以下中的至少一个：
    基于所述测量信息和所述第一执行条件信息，确定接入所述一个或多个小区中的所述一个或多个目标小区；和
    基于所述测量信息、所述第一执行条件信息和所述第二执行条件信息，确定接入所述一个或多个小区中的所述一个或多个目标小区。
  3. 如权利要求2所述的移动性管理方法，其中，所述基于所述测量信息、所述第一执行条件信息和所述第二执行条件信息，确定接入所述一个或多个小区中的所述一个或多个目标小区包括以下中的至少一个：
    响应于所述测量信息满足所述第一执行条件信息和所述第二执行条件信息，确定接入所述一个或多个小区中的所述一个或多个目标小区；和
    响应于所述测量信息满足所述第二执行条件信息，判断所述测量信息是否满足所述第一执行条件信息，并且响应于所述测量信息满足所述第一执行条件信息，确定接入所述一个或多个小区中的所述一个或多个目标小区。
  4. 如权利要求1到3的任一项所述的移动性管理方法，其中，所述执行条件信息包括对应于多个小区类型的多个执行条件信息，
    所述多个小区类型包括主小区、主辅小区、辅小区，并且所述执行条件信息还包括对应于所述多个小区类型的测量偏置信息。
  5. 如权利要求1到3的任一项所述的移动性管理方法，其中，还包括：
    基于所述一个或多个目标小区的类型和索引，接入所述一个或多个目标小区。
  6. 如权利要求2或3所述的移动性管理方法，其中，所述第一执行条件信息包括第一组条件、第二组条件、第三组条件中的至少一条，
    所述第一组条件包括：最近N次测量中L1-RSRP(c)-L1-RSRP(s)≥Th1，和预定时间内L1-RSRP(c)-L1-RSRP(s)≥Th2，
    所述第二组条件包括：最近N次测量中L1-RSRP(c)≥Th3，和预定时间内L1-RSRP(c)≥Th4，
    所述第三组条件包括：L1-RSRP(s)t1-L1-RSRP(s)t2≥Th5
    其中L1-RSRP(s)为在测量参考信号为服务小区的参考信号的情况下多个测量参考信号的多个L1-RSRP中的最大L1-RSRP，L1-RSRP(c)为在测量参考信号为候选小区的参考信号的情况下所述多个测量参考信号的所述多个L1-RSRP中的最大L1-RSRP，Th1到Th5为预定阈值。
  7. 如权利要求2或3所述的移动性管理方法，其中，所述第二执行条件信息是测量事件A3、A4、A5、B1中的任一个，
    所述测量事件A3指示同频候选小区或异频候选小区质量高于服务小区质量，
    所述测量事件A4指示异频候选小区质量高于第一阈值，
    所述测量事件A5指示服务小区质量低于第二阈值并且候选小区质量高于第三阈值，和
    所述测量事件B1指示异系统候选小区质量高于第四阈值。
  8. 一种移动性管理方法，由网络设备执行，包括：
    发送移动性管理消息，所述移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息，其中所述测量配置信息用于供终端设备获取所述一个或多个小区的测量信息、并基于所述测量信息和所述执行条件信息，确定接入所述一个或多个小区中的一个或多个目标小区。
  9. 如权利要求8所述的移动性管理方法，其中，所述执行条件信息包括：与层1测量相关的第一执行条件信息和与层3测量相关的第二执行条件信息中的至少一个。
  10. 如权利要求8或9所述的移动性管理方法，其中，所述执行条件信息包括对应于多个小区类型的多个执行条件信息，
    所述多个小区类型包括主小区、主辅小区、辅小区，并且所述执行条件信息还包括对应于所述多个小区类型的测量偏置信息。
  11. 一种移动性管理装置，包括：
    接收单元，被配置为接收移动性管理消息，所述移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息；
    获取单元，被配置为至少基于所述测量配置信息，获取所述一个或多个小区的测量信息；以及
    确定单元，被配置为基于所述测量信息和所述执行条件信息，确定接入所述一个或多个小区中的一个或多个目标小区。
  12. 一种移动性管理装置，包括：
    发送单元，被配置为发送移动性管理消息，所述移动性管理消息至少包括一个或多个小区的测量配置信息以及执行条件信息，其中所述测量配置信息用于供终端设备获取所述一个或多个小区的测量信息、并基于所述测量信息和所述执行条件信息，确定接入所述一个或多个小区中的一个或多个目标小区。
  13. 一种终端设备，包括：
    通信接口，被配置为与网络设备执行无线通信；
    存储器，用于存储计算机可读指令；以及
    处理器，用于运行所述计算机可读指令，使得所述终端设备执行如权利要求1到7的任一项所述的移动性管理方法。
  14. 一种网络设备，包括：
    通信接口，被配置为与终端设备执行无线通信；
    存储器，用于存储计算机可读指令；以及
    处理器，用于运行所述计算机可读指令，使得所述网络设备执行如权利要求8到10的任一项所述的移动性管理方法。
  15. 一种非瞬时性计算机可读存储介质，用于存储计算机可读指令，其中，当所述计算机可读指令由处理器执行时，使得所述处理器执行如权利要求1到7的任一项所述的移动性管理方法。
PCT/CN2025/074988 2024-01-24 2025-01-24 移动性管理方法、装置、终端设备、网络设备和存储介质 Pending WO2025157293A1 (zh)

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