WO2024008076A1 - 切换信息报告方法以及用户设备 - Google Patents

切换信息报告方法以及用户设备 Download PDF

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Publication number
WO2024008076A1
WO2024008076A1 PCT/CN2023/105710 CN2023105710W WO2024008076A1 WO 2024008076 A1 WO2024008076 A1 WO 2024008076A1 CN 2023105710 W CN2023105710 W CN 2023105710W WO 2024008076 A1 WO2024008076 A1 WO 2024008076A1
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Prior art keywords
handover
shr
information
reporting method
rlf
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PCT/CN2023/105710
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English (en)
French (fr)
Inventor
常宁娟
刘仁茂
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夏普株式会社
常宁娟
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Publication of WO2024008076A1 publication Critical patent/WO2024008076A1/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
    • H04W36/0055—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
    • 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
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Definitions

  • the present disclosure relates to the technical field of wireless communication, and more specifically, the present disclosure relates to a handover information reporting method and corresponding user equipment in the case of handover in wireless communication.
  • This disclosure proposes a solution to the problem of how to implement handover information reporting under a fast MCG recovery mechanism in an NR system.
  • the purpose of the embodiments of this disclosure is to propose a solution to the problem of how to implement handover information reporting under the fast MCG recovery mechanism in the NR system. More specifically, the present disclosure proposes a solution to how to record the corresponding handover information in a handover information report for a handover event when a fast MCG recovery process is performed in an NR system.
  • the present disclosure provides a handover information reporting method performed in user equipment and corresponding user equipment.
  • a handover information reporting method including: the user equipment UE receives a successful handover report SHR configuration containing the first trigger information from the network side; after the UE successfully completes the handover process to the target cell When, the UE performs operations for the SHR determination process; wherein the first trigger information is used to indicate: if When the UE receives a handover command or initiates a handover, the main cell group MCG link is in the radio link failure RLF state, and the UE generates an SHR when the handover process to the target cell is successfully completed.
  • the first trigger information can be represented by a sourceRLF-reporting information element or a MCGRLF-reporting information element.
  • the first trigger information may be configured by the source cell of the handover process.
  • the operation for the SHR determination process may include: judging whether the trigger condition is satisfied based on the trigger information in the SHR configuration, and when the trigger condition is satisfied Save the SHR and set the corresponding contents in the SHR.
  • the operations for the SHR determination process may include: if the first trigger information in the SHR configuration is set to true and when a switching command is received or When the source MCG link is in the RLF state when the handover process is initiated, the successful handover information of the handover event is stored in the UE variable used for SHR.
  • the SHR may include at least one of the following information: first SHR information, used to indicate that the triggering reason of the SHR is that the MCG link is in RLF; second SHR Information, used to indicate the cause of the occurrence of MCG RLF; the third SHR information, used to indicate the measurement results of the source cell when RLF occurred most recently; the fourth SHR information, used to indicate the measurement results of the neighbor cell when RLF occurred most recently .
  • the handover information reporting method may further include: the UE receives a UEInformationRequest message from the network side, and the UEInformationRequest message carries a message used to request the UE to report the saved the SHR instruction/request; and the UE includes the contents of the saved SHR in the UEInformationResponse message, and sends the UEInformationResponse message to the network side.
  • a handover information reporting method including: the user equipment UE successfully completes the handover process to the target cell; if the UE determines that the source MCG link is connected when receiving a handover command or initiating a handover process.
  • the UE saves the successful handover information corresponding to the associated handover event in the UE variable used for the successful handover report SHR and sets the corresponding content in the SHR.
  • the SHR may include at least one of the following information: first SHR information, used to indicate that the triggering reason of the SHR is that the MCG link is in RLF; second SHR Information, used to indicate the cause of the occurrence of MCG RLF; the third SHR information, used to indicate the measurement results of the source cell when RLF occurred most recently; the fourth SHR information, used to indicate the measurement results of the neighbor cell when RLF occurred most recently .
  • a user equipment UE including: a processor; and a memory storing instructions; wherein the instructions execute handover information reporting according to the context when executed by the processor. method.
  • FIG. 1 is a schematic flowchart showing a handover information reporting method in Embodiment 1 of the present disclosure.
  • FIG. 2 is a schematic flowchart showing a handover information reporting method in Embodiment 2 of the present disclosure.
  • FIG. 3 is a schematic flowchart showing a handover information reporting method in Embodiment 3 of the present disclosure.
  • FIG. 4 is a schematic flowchart showing a handover information reporting method in Embodiment 4 of the present disclosure.
  • FIG. 5 is a block diagram showing user equipment UE according to the present disclosure.
  • LTE Long Term Evolution
  • NR New Radio Access
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E -UTRAN Evolved Universal Terrestrial Radio Access Network
  • handover refers to the change of the primary cell initiated by the network side, including the change of the primary cell between cells and the change of the primary cell within the cell, that is, the primary cell of the UE is changed from the source cell to the target cell, where the source cell
  • the target cell may be the same cell or a different cell.
  • the secret key or security algorithm used for access layer security may or may not be updated accordingly.
  • the security includes encryption, decryption and integrity protection.
  • the source cell can also be called the source base station, or source beam (beam), source transmission point (Transmission point, TRP), source primary cell (Primary Cell, PCell), source primary cell group (Master Cell Group, MCG); target The cell can also be called the target base station, or target beam, target transmission point, target main cell PCell, target Standard cell group MCG.
  • the source cell refers to the connected cell serving the UE before the handover process is initiated, that is, the cell that sends a radio resource control (Radio Resource Control, RRC) message containing a handover command to the UE.
  • RRC Radio Resource Control
  • the target cell refers to the cell serving the UE to which the UE is connected after the handover process is successfully completed, the cell indicated by the target cell identifier contained in the handover command, or the cell described as performing downlink synchronization and random access during the handover process.
  • the handover command described in this disclosure is used to trigger the UE to perform handover.
  • it is an RRC reconfiguration message containing a synchronization reconfiguration (Reconfiguration with sync) information element.
  • the handover may also be called a synchronous reconfiguration of the MCG.
  • it is an RRC connection reconfiguration message containing a mobility control information (MobilityControlInfo) information element.
  • the synchronization reconfiguration information element or the mobility control information information element may include the configuration information of the target cell, such as the target cell identity, the target cell frequency, the public configuration of the target cell such as system information, and the configuration information used by the UE to access the target cell. Random access configuration, UE security parameter configuration in the target cell, UE radio bearer configuration in the target cell, etc.
  • the handover command is equivalent to the RRC message containing the handover command, and refers to the RRC message that triggers the UE to perform handover or the configuration in the RRC message.
  • Switch configuration refers to all or part of the configuration in the switch command. Cancel, Release, Delete, Empty and Clear can be replaced. Execution, use and application are interchangeable. Configuration and reconfiguration can be replaced. Monitor and detect are interchangeable.
  • the RRC re-establishment message is the same as the RRC connection re-establishment message; similarly, the response message RRC re-establishment complete message is the same as the RRC connection re-establishment complete message.
  • the RRC reconfiguration message used for the handover command carries the RRC configuration from the target base station, including but not limited to the following RRC configuration (for details, please refer to Chapter 6.2.2 in 3GPP Technical Standard Protocol 38.331):
  • Measurement configuration used to configure intra-frequency, inter-frequency and inter-radio access technology measurements performed by the UE. Such as measurement object configuration, measurement reporting configuration, measurement gap configuration, etc.
  • cellGroupConfig information element used to configure the primary cell group or secondary cell group.
  • RLC Radio Link Control
  • rlc-bearerToAddModList information element and rlc-bearerToreleaselist information element used to configure the primary cell group or secondary cell group.
  • MAC Medium Access Control
  • the SpCell configuration includes cell index number, handover information (reconfigurationWithSync information element), wireless link failure related timer and constant configuration, wireless link detection (Radio Link Monitoring, RLM) configuration, special cell-specific configuration, etc.
  • the reconfigurationwithsync information element is similar to the mobility control information in the LTE system and contains handover-related information to achieve mobility. It includes the serving cell configuration public information, the UE's cell radio network temporary identifier C-RNTI in the target cell, and the handover process monitoring timer. T304 configuration, random access-specific configuration for random access process to the target cell, etc.
  • RadiobearerConfig information element used to configure the service data application protocol layer (Service Data Application Protocol, SDAP) of the data radio bearer (Data Radio Bearer, DRB) and/or the signaling radio bearer (Signaling Radio Bearer, SRB) ) and the Packet Data Convergence Protocol layer (Packet Data Convergence Protocol, PDCP).
  • SDAP Service Data Application Protocol
  • DRB Data Radio Bearer
  • SRB Signaling Radio Bearer
  • Packet Data Convergence Protocol layer Packet Data Convergence Protocol layer
  • the handover process refers to the process in which the UE in the RRC connected state changes the serving cell (primary cell).
  • the general handover process includes the following stages: Stage 1: Measurement stage. The UE measures the wireless link corresponding to the serving cell or neighboring cell based on the configured measurement configuration. When the configured measurement configuration is met, the UE When the measurement reporting conditions are met, the UE sends a measurement report to the base station.
  • Phase 3 Switch execution phase.
  • the source base station issues the handover command to the UE, and the UE that receives the handover command immediately applies the configuration of the handover command to perform handover.
  • the UE detects the handover process through a timer T304. When the handover process is initiated, the UE starts the T304 timer; when the handover process is completed (the random access process is successfully completed), the UE stops the timer T304; when T304 times out, the UE considers the handover fail.
  • the UE establishes links with two base stations at the same time, that is, the radio resources used by the UE are provided by different schedulers located at the two base stations.
  • the wireless access between the two base stations and the UE can be of the same or different standards (Radio Access Technology, RAT), for example, both are NR, or one is NR and the other is LTE, also called evolved universal terrestrial wireless access (RAT). Evolved Universal Terrestrial Radio Access, E-UTRA).
  • RAT Radio Access Technology
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • the master base station Master Node, MN
  • MgNB MgNB
  • MeNB MgNB
  • MeNB serving cell group under the master base station
  • the secondary base station Secondary Node, SN
  • SgNB SgNB
  • SeNB serving cell group under the secondary base station
  • SCG Secondary Cell Group
  • the primary base station is LTE and the secondary base station is NR
  • the DC is called EN-DC (using 4G core network) or NGEN-DC (using 5G core network);
  • the primary base station and secondary base station are both NR, the DC is called NR-DC .
  • MCG includes a primary cell (Primary Cell, PCell) and optionally one or more secondary cells (Secondary Cell, SCell).
  • PCell works on the main frequency, and the UE performs the initial connection establishment process or connection re-establishment process through the main frequency.
  • SCG contains a PSCell and optionally one or more SCells.
  • PSCell refers to the SCG cell that the UE performs random access when performing the synchronization reconfiguration process or the SCG addition process.
  • PCell and PSCell are also collectively referred to as special cells SpCell.
  • the DRB and SRB of the UE are supported as split bearers.
  • Split SRB supports transmission through two paths: MCG and SCG.
  • the RRC protocol data unit can also be transmitted on the MCG and SCG paths.
  • Unit, PDU to improve the transmission rate or reliability.
  • Split bearer can be for the uplink path or the downlink path. Supports configuring SRB1 and SRB2 as split SRB.
  • the network side can decide which path to choose to send data based on some criteria such as channel quality.
  • the UE determines whether to use the MCG path or send on both paths according to the RRC signaling configuration on the network side. When not configured as split SRB, SRB1 and SRB2 are transmitted through the MCG path.
  • SRB3 can also be established for the SN, which is mainly used to transmit the configuration associated with the SCG between the SN and the UE. The establishment and release of SRB3 are determined by the SN. Split SRB configuration for SRB3 is not supported. The UE can configure split SRB1 and SRB3 at the same time.
  • the Release 16 dual link and carrier aggregation enhancement project introduces a fast MCG link recovery mechanism.
  • the fast MCG link recovery mechanism when the UE's MCG occurs a radio link failure (Radio Link Failure, RLF) or the UE fails to perform the handover process (HandOver Failure, HOF) (that is, the T304 of the MCG times out), if the UE is configured T316 (that is, fast MCG link recovery is enabled) and the secondary cell group SCG link quality is good (that is, RLF does not occur, timer T310 is not running or is not in the PSCell addition and change process (that is, T04 corresponding to PSCell is not running), or SCG is not suspended (not suspended), or SCG is not deactivated), at this time, neither MCG nor SCG is suspended (or interrupted) or timer T316 is not running.
  • RLF Radio Link Failure
  • HOF Handover Failure
  • the UE initiates the MCG failure information process, starts the timer T316, and sends the MCG failure information (MCGFailureInformation) message containing the MCG link failure information report to the main base station through the SCG path (such as split SRB1 or SRB3), instead of directly triggering RRC. Connection re-establishment process.
  • MCG failure information MCG failure information
  • the UE will suspend the transmission of the MCG path, such as suspending the transmission of all SRBs and DRBs on the MCG side except SRB0, reset the MAC entity corresponding to the MCG, and wait during the running of timer T316 Network side response.
  • the master base station that receives the MCG failure information RRC message can send an RRC reconfiguration message containing a synchronized reconfiguration information element to the UE to trigger the UE to switch to a new cell or send an RRC release message to release the UE's RRC connection.
  • the UE stops T316. Perform corresponding operations according to the received response message (RRC reconfiguration message or RRC release message). If T316 times out, the UE initiates the RRC re-establishment process.
  • This fast MCG link recovery mechanism/process can be applied to situations where MR-DC (Multi-Radio access technology Dual Connectivity) is configured, such as NE-DC (NR E-UTRA Dual Connectivity), EN-DC (E- UTRA NR Dual Connectivity), NR DC (New Radio Dual Connectivity), NGEN-DC (Next Generation-radio access network E-UTRA NR Dual Connectivity), LTE DC (intra-E-UTRAN DC), etc.
  • MR-DC Multi-Radio access technology Dual Connectivity
  • NE-DC NR E-UTRA Dual Connectivity
  • EN-DC E- UTRA NR Dual Connectivity
  • NR DC New Radio Dual Connectivity
  • NGEN-DC Next Generation-radio access network E-UTRA NR Dual Connectivity
  • LTE DC intra-E-UTRAN DC
  • the handover information report when the handover is successful is also referred to as the successful handover report (Successful Handover Report, SHR).
  • SHR successful Handover Report
  • the content of the successful handover information report may include one or more of the following: UE wireless network temporary identity C-RNTI, source cell identity, target cell identity, source cell or target cell measurement results, neighbor cell measurement results, indication success
  • the handover information report is triggered (that is, which trigger condition is met), random access process information, location information, etc.
  • the successful handover includes the successful sending of an RRC reconfiguration completion message in response to the handover command RRC reconfiguration message to the target base station or the successful completion of a random access process to the target base station by the MAC layer.
  • the network side configures the information used to trigger a successful handover report to the UE (such as the threshold values corresponding to T310, T312, and T304, the source cell experienced RLF during the dual active protocol stack (Dual Active Protocol Stack, DAPS) handover execution process), which is called Configure for SHR.
  • Configure for SHR Only when one or more trigger conditions are met according to the configured trigger information (for example, when a handover command is received or when a handover is performed, the percentage of the operating value of T310 (or T312) of the source cell and the configured value of T310 (or T312) exceeds the The corresponding configured threshold value, the operating value of T304 when the switch is successfully completed, and the T304 The percentage of the configuration value exceeds the corresponding configured threshold value.
  • the UE When RLF occurs in the source cell during DAPS handover execution (when timer T304 is running), the UE will change the UE variable corresponding to SHR (such as VarSuccessHO-Report ) records the switching information of the successful switching.
  • the trigger conditions related to the source cell such as the T310 threshold or the T312 threshold
  • the trigger conditions related to the target cell such as the T304 threshold
  • These successful handover reports are triggered.
  • the configuration of the information is included in the successful handover report configuration (such as the successHO-config information element).
  • the UE can inform the network side that there is a successful handover report available on it through an RRC message (as indicated by the successHO-InfoAvailable information element). After receiving the indication, the network side may request the UE to report its saved successful handover information report through an RRC message (such as the successHO-ReportReq indication in the UEInformationRequest message). The UE will report the saved successful handover report (successHO-Report in the UEInformationResponse message) to the network side in the response RRC message. Successful handover reports saved on the UE can be saved for up to 48 hours.
  • a successful handover process means that the link of the primary cell can successfully receive the handover command. Even if the link status of the main base station is not very good at this time (for example, the timer T310 or T312 used for link failure monitoring is already running when the handover command is received), it is still in a state where the handover command can at least be successfully received.
  • the MCG failure information process after a link failure occurs, the MCG will send an MCGFailureinformation message through the SCG link to inform the main base station of the failure, and then receive the handover command from the main base station through the SCG link (split SRB1 or SRB3).
  • the handover command is received from the SCG link, even if the UE successfully receives the handover command, it does not mean that the link status of the primary cell is in a state that can successfully receive the command.
  • the UE starts timer T316 to wait for the handover command from the network side. Assume that T316 receives the switching command when the running time reaches T, which means that the switching command is received after T time after the MCG link fails.
  • the handover command should be issued to the UE before the MCG RLF occurs to avoid data interruption caused by the MCG RLF.
  • the existing successful handover report prevents the base station from knowing whether the handover was issued in the above scenario after receiving the successful handover report. This will bring inaccuracy to the adjustment and optimization of switching parameters. The above-mentioned problems become problems solved by the present disclosure.
  • This embodiment provides a configuration, triggering and setting method of handover information reporting performed on the UE.
  • the UE receives an SHR configuration containing a trigger information set to RLF from the network side, so that the UE can trigger the UE to record the handover information SHR of the handover event based on the configured trigger information after the handover process is successful.
  • the above Report to the network for adjustment and optimization of handover parameters.
  • FIG. 1 is a schematic flow chart showing a handover information reporting method in Embodiment 1 of the present disclosure.
  • the handover information reporting method in Embodiment 1 of the present disclosure may include the following steps.
  • Step 101 The UE receives the SHR configuration including the first trigger information from the network side.
  • the first trigger information is set to true to indicate that if the MCG link (PCell) is in the RLF state when the UE receives a handover command or initiates a handover, then the UE successfully completes the handover process to the target cell.
  • the first trigger information is represented by a sourceRLF-reporting information element or a MCGRLF-reporting information element.
  • the first trigger information is configured by the source cell of the handover process.
  • the first trigger information is configured by the target cell of the handover process.
  • the SHR configuration includes the configuration used to instruct the UE to report successful handover information to the network side.
  • it is identified by the successHO-Config information element and is included in the other-config information element in the RRC message.
  • the RRC message is an RRC reconfiguration message.
  • the MCG link is in the RLF state, which is also equivalent to the timer T316 being running when the UE receives the handover command. Therefore, the above step 101 can also be expressed as, the first trigger information is set to true to indicate If the timer T316 is in the running state when the UE receives a handover command or initiates a handover, the UE generates an SHR when the handover process to the target cell is successfully completed.
  • the UE When the UE receives the RRC message containing the SHR configuration, the UE applies the SHR configuration and considers it to be configured with the SHR configuration.
  • Step 102 When the UE successfully completes the handover process to the target cell, the UE performs operations for the SHR determination process.
  • the operations for the SHR determination process may include: determining whether the trigger condition is satisfied based on the trigger information in the SHR configuration and saving the SHR and setting the corresponding content in the SHR when the trigger condition is satisfied.
  • performing the operation for the SHR determination process may include: if the first trigger information in the SHR configuration is set to true and the source MCG/PCell is in the state when the switching command is received or the switching process is initiated. In the RLF state, the successful handover information of the handover event is saved in the UE variable used for SHR.
  • performing the operation for the SHR determination process may further include: if the first trigger information in the SHR configuration is set to true and the source MCG/PCell is in the RLF state when the switching command is received or the switching process is initiated, then setting the SHR
  • the first SHR information in the triggering cause ie, SHR-cause information element
  • the first SHR information is used to indicate that the triggering reason of the SHR is that the MCG/PCell is in RLF; or the SHR contains second SHR information, and the second SHR information indicates the reason why the MCG RLF occurs.
  • the RLF reasons are random access problems, T310 timeout, T312 timeout, RLC reaching the maximum number of retransmissions, etc.
  • the SHR configuration is further described as the SHR configuration (received or applied) before performing the handover procedure, ie, performing the most recent synchronization reconfiguration.
  • the successful completion of the handover to the target cell refers to the successful completion of the random access process triggered by the MCG handover process.
  • the operations performed for the SHR determination process in step 102 include: if the first trigger information in the SHR configuration is set to true and when a switching command is received or a switching process is initiated If T316 is in the running state, the successful handover information of this handover event is saved in the UE variable used for SHR.
  • performing the operation for the SHR determination process further includes: if the th. Once the trigger information is set to true and T316 is in the running state when the switching command is received or the switching process is initiated, the first SHR information in the triggering cause of the SHR (ie, the SHR-cause information element) is set to true.
  • the first SHR information is used to indicate that the triggering reason for the SHR is that T316 is running (that is, the UE is performing a fast MCG recovery process); or the second SHR information is included in the SHR, and the second SHR information indicates the MCG RLF.
  • the reason why it happened is random access problems, T310 timeout, T312 timeout, RLC reaching the maximum number of retransmissions, etc.
  • step 101 and step 102 it also includes the UE receiving the handover command from the network and executing the handover process; or the UE executing the conditional reconfiguration (Conditional Reconfiguration) evaluation process.
  • the triggering condition of the conditional reconfiguration is met (i.e., in (a triggering cell is determined during the conditional reconfiguration evaluation process) is to perform a handover process based on conditional reconfiguration.
  • This embodiment provides a triggering method for handover information reporting performed on the UE.
  • the UE can determine whether to trigger the UE to record the handover information SHR of the handover event based on whether the current MCG is in the RLF state, and report it to the network for adjustment and optimization of handover parameters.
  • the UE needs to receive the trigger information in the SHR configuration from the network side.
  • the UE successfully completes the handover process to the target cell, if the UE determines that when the handover command is received or the handover process is initiated, If the source MCG/PCell is in the RLF state, the UE always saves the successful handover information corresponding to the associated handover event in the UE variable used for SHR and sets the corresponding content in SHR.
  • FIG. 2 is a schematic flow chart showing a handover information reporting method in Embodiment 2 of the present disclosure.
  • the handover information reporting method in Embodiment 2 of the present disclosure may include the following steps.
  • Step 201 The UE successfully completes the handover process to the target cell.
  • Step 202 If the UE determines that the source MCG link is in the RLF state when receiving the handover command or initiating the handover process, the UE saves the associated handover in the UE variable for SHR. The successful switching information corresponding to the switching event and set the corresponding content in SHR.
  • the successful completion of the handover to the target cell refers to the successful completion of the random access process triggered by the MCG handover process.
  • this embodiment can also be expressed as when the UE successfully completes the handover process to the target cell, if the UE determines that T316 is running when the handover command is received or the handover process is initiated (that is, the UE is performing fast MCG recovery process), the UE always saves the successful handover information corresponding to the associated handover event in the UE variable for SHR and sets the corresponding content in SHR.
  • the content in the SHR may include one or more of the following: UE wireless network temporary identity C-RNTI, source cell identity, target cell identity, measurement results of the source cell or target cell, neighbor cell measurements Result, indicating the reason why the successful handover information report is triggered (that is, which trigger condition is satisfied), random access process information, location information, etc.
  • the content in the SHR may also include the first to second SHR information described in Embodiment 1. In this embodiment, the content in the SHR is not limited.
  • this embodiment also includes the UE receiving the handover command from the network and executing the handover process; or the UE executing the conditional reconfiguration (Conditional Reconfiguration) evaluation process. (It is determined that there is a triggering cell during the process) is to perform a handover process based on conditional reconfiguration.
  • This embodiment provides a handover information reporting method performed on the UE.
  • the UE can report relevant information to the base station in the successful handover report to provide more accurate handover information to the network side.
  • the base station may adjust and optimize the handover parameters in combination with the relevant information in the successful handover report that the UE has performed a fast MCG link recovery process.
  • FIG 3 is a schematic flow chart showing a handover information reporting method in Embodiment 3 of the present disclosure.
  • the handover information reporting method in Embodiment 3 of the present disclosure may include the following steps.
  • step 301 the UE receives a handover command from the network side and performs handover.
  • step 302 the UE saves the successful handover information of the successful handover in the successful handover report variable, where the successful handover information includes one or more of the following:
  • the third SHR information is used to indicate the measurement result of the source cell when RLF occurred last time
  • the fourth SHR information is the measurement result of the neighboring cell when RLF occurred last time.
  • This embodiment does not limit the UE to determine the trigger for recording SHR, but only focuses on the UE recording the above SHR information in SHR. Therefore, the method of UE triggering SHR recording described in Embodiment 1 or 2 can be combined with this embodiment.
  • This embodiment provides a handover information reporting method performed on the UE. Through the method described in this embodiment, the UE can report the relevant information in the previous embodiment to the base station in the successful handover report, so as to provide more accurate handover information to the network side. This embodiment provides a method for the UE to report the handover information report described in Embodiments 1 to 3 through the RRC process.
  • FIG. 4 is a schematic flow chart showing a handover information reporting method in Embodiment 4 of the present disclosure.
  • the handover information reporting method in Embodiment 4 of the present disclosure may include the following steps.
  • Step 401 The UE receives a UEInformationRequest message from the network side, which carries an instruction/request (such as the successHO-ReportReq information element set to true) for requesting the UE to report the saved successful handover report.
  • an instruction/request such as the successHO-ReportReq information element set to true
  • Step 402 The UE includes the contents of the saved successful handover report in the UEInformationResponse message (successHO-Report information element), and sends the UEInformationResponse message to the network side.
  • the successful handover report included in the RRC message includes one or more of the first to fourth SHR information in the previous embodiment.
  • FIG. 5 is a block diagram showing user equipment UE according to the present disclosure.
  • the user equipment UE50 includes processor 501 and memory 502.
  • the processor 501 may include, for example, a microprocessor, a microcontroller, an embedded processor, or the like.
  • the memory 502 may include, for example, volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory.
  • Memory 502 stores program instructions. When this instruction is executed by the processor 501, it can execute the above-mentioned switching information reporting method described in detail in the present invention.
  • the method and related equipment of the present disclosure have been described above in conjunction with preferred embodiments. Those skilled in the art will understand that the methods shown above are only exemplary. The method of the present disclosure is not limited to the steps and sequence shown above.
  • the base station and user equipment shown above may include more modules, for example, may also include modules that may be developed or developed in the future and may be used for the base station, MME, or UE, and so on.
  • the various identifications shown above are only illustrative and not restrictive, and the present disclosure is not limited to the specific information elements as examples of these identifications. Many changes and modifications may be made by those skilled in the art in light of the teachings of the illustrated embodiments.
  • the program running on the device may be a program that causes the computer to implement the functions of the embodiments of the present disclosure by controlling a central processing unit (CPU).
  • the program or information processed by the program may be temporarily stored in volatile memory (such as random access memory RAM), hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory systems.
  • Programs for realizing the functions of each embodiment of the present disclosure may be recorded on a computer-readable recording medium.
  • Corresponding functions can be realized by causing the computer system to read programs recorded on the recording medium and execute these programs.
  • the so-called “computer system” here may be a computer system embedded in the device, which may include an operating system or hardware (such as peripheral devices).
  • the "computer-readable recording medium” may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a short-term dynamic storage program recording medium, or any other recording medium readable by a computer.
  • circuits eg, single-chip or multi-chip integrated circuits.
  • Circuitry designed to perform the functions described in this specification may include a general-purpose processor, a digital signal processor (DSP), a special purpose processor ASIC, field programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of the foregoing.
  • DSP digital signal processor
  • FPGA field programmable gate array
  • a general-purpose processor can be a microprocessor or any existing processor, controller, microcontroller, or state machine.
  • the above circuit may be a digital circuit or an analog circuit.

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Abstract

本公开提供了一种切换信息报告方法以及用户设备。切换信息报告方法包括：用户设备UE从网络侧接收包含第一触发信息的成功切换报告SHR配置；在所述UE成功完成到目标小区的切换过程时，所述UE执行用于SHR确定过程的操作；其中，所述第一触发信息用于指示：若UE在收到切换命令或发起切换时主小区组MCG链路处于无线链路失败RLF状态，则UE在成功完成到目标小区的切换过程时生成SHR。

Description

切换信息报告方法以及用户设备 技术领域
本公开涉及无线通信技术领域，更具体地，本公开涉及在无线通信中进行切换的情况下的切换信息报告方法以及对应的用户设备。
背景技术
2021年12月，在第三代合作伙伴计划(3rd Generation Partnership Project：3GPP)RAN#94e次全会上批准了一个Release 18技术标准的新的研究项目(参见非专利文献：RP-213553：New WID on further enhancement of data collection for SON(Self-Organising Networks)/MDT(Minimization of Drive Tests)in NR and EN-DC)。这个项目的研究目的是对基于版本17的NR系统中的网络数据收集过程进行进一步增强，以更好地实现自组织自优化网络以及最小化路测的目的。其中研究的具体技术之一是实现快速主小区组(Master Cell Group，MCG)恢复机制下的移动性能优化机制。
本公开针对在NR系统中如何实现快速MCG恢复机制下的切换信息报告问题提出解决方法。
发明内容
本公开实施例的目的在于如何实现在NR系统中快速MCG恢复机制下的切换信息报告的问题提出解决方法。更具体地，本公开针对在NR系统中如何对在执行了快速MCG恢复过程时的切换事件在切换信息报告中记录其对应的切换信息提出了解决方法。本公开提供了在用户设备中执行的切换信息报告的方法以及相应的用户设备。
根据本公开的第一方面，提出了一种切换信息报告方法，包括：用户设备UE从网络侧接收包含第一触发信息的成功切换报告SHR配置；在所述UE成功完成到目标小区的切换过程时，所述UE执行用于SHR确定过程的操作；其中，所述第一触发信息用于指示：若 UE在收到切换命令或发起切换时主小区组MCG链路处于无线链路失败RLF状态，则UE在成功完成到目标小区的切换过程时生成SHR。
在上述第一方面的切换信息报告方法中，优选地，所述第一触发信息可以通过sourceRLF-reporting信息元素或MCGRLF-reporting信息元素表示。
在上述第一方面的切换信息报告方法中，优选地，所述第一触发信息可以由切换过程的源小区配置。
在上述第一方面的切换信息报告方法中，优选地，所述用于SHR确定过程的操作可以包含：基于所述SHR配置中的触发信息来判断触发条件是否满足、以及当所述触发条件满足时保存SHR并设置对应的SHR中的内容。
在上述第一方面的切换信息报告方法中，优选地，所述用于SHR确定过程的操作可以包括：若所述SHR配置中的所述第一触发信息设置为true且当接收到切换命令或发起切换过程时源MCG链路处于RLF状态，则在用于SHR的UE变量中保存该次切换事件的成功切换信息。
在上述第一方面的切换信息报告方法中，优选地，所述SHR可以包含如下的至少一个信息：第一SHR信息，用于指示所述SHR的触发原因是MCG链路处于RLF；第二SHR信息，用于指示MCG RLF发生的原因；第三SHR信息，用于指示最近一次发生RLF时的源小区的测量结果；第四SHR信息，用于指示最近一次发生RLF时的邻居小区的测量结果。
在上述第一方面的切换信息报告方法中，优选地，所述切换信息报告方法可以还包括：所述UE收到来自网络侧的UEInformationRequest消息，所述UEInformationRequest消息携带了用于请求UE上报所保存的SHR的指示/请求；和所述UE将所保存的SHR中的内容包含在UEInformationResponse消息中，向网络侧发送UEInformationResponse消息。
根据本公开的第二方面，提出了一种切换信息报告方法，包括：用户设备UE成功完成到目标小区的切换过程；若所述UE判断在接收到切换命令或发起切换过程时源MCG链路处于无线链路失败RLF状态，则所述UE在用于成功切换报告SHR的UE变量中保存所关联的切换事件所对应的成功切换信息并设置对应的SHR中的内容。
在上述第二方面的切换信息报告方法中，优选地，所述SHR可以包含如下的至少一个信息：第一SHR信息，用于指示所述SHR的触发原因是MCG链路处于RLF；第二SHR信息，用于指示MCG RLF发生的原因；第三SHR信息，用于指示最近一次发生RLF时的源小区的测量结果；第四SHR信息，用于指示最近一次发生RLF时的邻居小区的测量结果。
根据本公开的第三方面，提出了一种用户设备UE，包括：处理器；以及存储器，存储有指令；其中，所述指令在由所述处理器运行时执行根据上下文所述的切换信息报告方法。
附图说明
为了更完整地理解本公开及其优势，现在将参考结合附图的以下描述，其中：
图1是表示本公开的实施例1中的切换信息报告方法的示意流程图。
图2是表示本公开的实施例2中的切换信息报告方法的示意流程图。
图3是表示本公开的实施例3中的切换信息报告方法的示意流程图。
图4是表示本公开的实施例4中的切换信息报告方法的示意流程图。
图5是表示本公开所涉及的用户设备UE的框图。
在附图中，相同或相似的结构均以相同或相似的附图标记进行标识。
具体实施方式
根据结合附图对本公开示例性实施例的以下详细描述，本公开的其它方面、优势和突出特征对于本领域技术人员将变得显而易见。
在本公开中，术语“包括”和“含有”及其派生词意为包括而非限制；术语“或”是包含性的，意为和/或。
在本说明书中，下述用于描述本公开原理的各种实施例只是说明，不应该以任何方式解释为限制公开的范围。参照附图的下述描述用于帮助全面理解由权利要求及其等同物限定的本公开的示例性实施例。下述描述包括多种具体细节来帮助理解，但这些细节应认为仅仅是示例性的。因此，本领域普通技术人员应认识到，在不背离本公开的范围和精神的情况下，可以对本文中描述的实施例进行多种改变和修改。此外，为了清楚和简洁起见，省略了公知功能和结构的描述。此外，贯穿附图，相同参考数字用于相似功能和操作。
下文以长期演进系统(Long Term Evolution，LTE)/NR移动通信系统及其后续的演进版本作为示例应用环境，具体描述了根据本公开的多个实施方式。然而，需要指出的是，本公开不限于以下实施方式，而是可适用于更多其它的无线通信系统。若无特殊说明，在本公开中，小区和基站的概念可以互相替换；LTE可以用演进的通用陆地无线接入(Evolved Universal Terrestrial Radio Access，E-UTRA)或演进的通用陆地无线接入网E-UTRAN来替换。在本公开中，切换指的是网络侧发起的主小区的变更，包含小区间的主小区变更也包含小区内的主小区变更，即UE的主小区从源小区变更为目标小区，其中源小区和目标小区可以是同一个小区也可以是不同的小区，在此过程中，用于接入层安全的秘钥或安全算法也可随之更新或不更新。所述安全包括加密解密和完整性保护。源小区也可称为源基站，或称源光束(beam)、源传输点(Transmission point，TRP)，源主小区(Primary Cell，PCell)，源主小区组(Master Cell Group，MCG)；目标小区也可称为目标基站，或目标光束、目标传输点，目标主小区PCell，目 标小区组MCG。源小区指的是切换过程发起之前所连接的为UE服务的小区即向UE发送包含切换命令的无线资源控制(Radio Resource Control，RRC)消息的小区。目标小区指的是切换过程成功完成之后UE所连接的为UE服务的小区，切换命令中所包含的目标小区标识所指示的小区，或描述为切换过程中执行下行同步和随机接入的小区。本公开所述切换命令用于触发UE执行切换，在NR系统中是包含同步重配置(Reconfigurationwithsync)信息元素的RRC重配置消息，更进一步地，是包含用于主小区组MCG的同步重配置(Reconfigurationwithsync)信息元素的RRC重配置消息。此时，切换也可称为MCG的同步重配置。在LTE系统中是包含移动控制信息(MobilityControlInfo)信息元素的RRC连接重配置消息。其中，所述同步重配置信息元素或移动控制信息信息元素可以包含目标小区的配置信息，例如目标小区标识、目标小区频率、目标小区的公共配置如系统信息、UE接入到目标小区所使用的随机接入配置、UE在目标小区的安全参数配置、UE在目标小区的无线承载配置等。为便于描述，本公开中RRC重配置消息和RRC连接重配置消息等同；同理，其响应消息RRC重配置完成消息和RRC连接重配置完成消息等同。切换命令和包含切换命令的RRC消息等同，指触发UE执行切换的RRC消息或RRC消息中的配置。切换配置指切换命令中的全部或部分配置。取消、释放、删除、清空和清除等可以替换。执行、使用和应用可替换。配置和重配置可以替换。监测(monitor)和检测(detect)可替换。RRC重建立消息和RRC连接重建立消息等同；同理，其响应消息RRC重建立完成消息和RRC连接重建立完成消息等同。
下列描述了本公开涉及的现有技术中的过程或概念。
NR系统中的切换配置：
在NR系统中，用于切换命令的RRC重配置消息承载着来自目标基站的RRC配置，包含但不限于下述RRC配置(具体请参见3GPP技术标准协议38.331中的6.2.2章节)：
-测量配置(measconfig信息元素)：用于配置UE所执行的频率内、频率间和无线接入技术间的测量。如测量对象配置、测量上报配置、测量空隙(gap)配置等。
-小区组配置(cellGroupConfig信息元素)，用于配置主小区组或辅小区组。包括数据无线承载/信令无线承载对应的无线链路控制(Radio Link Control，RLC)承载配置(rlc-bearerToAddModList信息元素和rlc-bearerToreleaselist信息元素)、媒介接入控制(Medium Access Control，MAC)配置(MAC-cellgroupconfig信息元素)、物理层配置、辅小区添加/修改/释放配置、特殊小区(Special cell，SpCell)配置等。其中，SpCell配置中包含小区索引号、切换信息(reconfigurationWithSync信息元素)、无线链路失败相关定时器及常数配置、无线链路检测(Radio Link Monitoring，RLM)配置、特殊小区专用配置等。其中reconfigurationwithsync信息元素和LTE系统中的移动控制信息类似，包含切换相关信息来实现移动性，其包含服务小区配置公共信息、UE在目标小区的小区无线网络临时标识C-RNTI、切换过程监控定时器T304配置、用于向目标小区随机接入过程的随机接入专用配置等。
-非接入层专用信息(dedicatedInfoNASList信息元素)。
-无线承载配置(radiobearerConfig信息元素)，用于配置数据无线承载(Data Radio Bearer，DRB)和/或信令无线承载(Signaling Radio Bearer，SRB)的服务数据应用协议层(Service Data Application Protocol，SDAP)和包数据汇聚协议层(Packet Data Convergence Protocol，PDCP)。
-主密钥更新配置(masterKeyupdate信息元素)。
NR系统中的切换过程：
连接态的用户移动性主要通过切换过程来实现，所述切换即指的是处于RRC连接态的UE变更服务小区(主小区)的过程。一般的切换过程包含下述阶段：阶段1：测量阶段。UE基于被配置的测量配置对服务小区或邻小区所对应的无线链路进行测量，当满足所配置 的测量上报条件时，UE向基站发送测量报告。阶段2：切换准备阶段。基站结合收到的测量报告以及其他因素如基站负载等确定对该UE触发切换，源基站和目标基站通过切换准备过程获取目标基站配置的切换命令。阶段3：切换执行阶段。源基站将切换命令下发给UE，收到切换命令的UE立即应用该切换命令的配置执行切换。UE通过一个定时器T304来检测切换过程，当切换过程发起时，UE开启T304定时器；当切换过程完成(随机接入过程成功完成)时，UE停止定时器T304；当T304超时，UE认为切换失败。
双连接(Dual Connectivity)：
为了提高UE的数据传输效率，UE同时与两个基站建立链路，也就是UE所使用的无线资源由位于两个基站的不同调度器提供。这两个基站与UE之间的无线接入可以是相同或不同的制式(Radio Access Technology，RAT)，如都是NR，或一个是NR，一个是LTE也称演进的通用陆地无线接入(Evolved Universal Terrestrial Radio Access，E-UTRA)。在这两个基站中，一个称为主基站(Master Node，MN)或MgNB、MeNB，主基站下的服务小区组称为主小区组(Master Cell Group，MCG)；另一个称为辅基站(Secondary Node，SN)或SgNB、SeNB，辅基站下的服务小区组称为辅小区组(Secondary Cell Group，SCG)。当主基站是LTE，辅基站是NR时的DC称为EN-DC(使用4G核心网)或NGEN-DC(使用5G核心网)；当主基站和辅基站都是NR时的DC称为NR-DC。MCG包含一个主小区(Primary Cell，PCell)和可选的一个或多个辅小区(Secondary Cell，SCell)。PCell工作在主频率上，UE通过主频率执行初始连接建立过程或连接重建立过程。SCG包含一个PSCell和可选的一个或多个SCell。PSCell是指UE在执行同步重配置过程或SCG添加过程时执行随机接入的SCG小区。PCell和PSCell也统称为特殊小区SpCell。在配置了DC时，支持对UE的DRB和SRB配置为分裂承载(split bearer)。Split SRB支持通过MCG和SCG两条路径传输。在应用副本(duplication)发送机制时，MCG和SCG路径上还可以传RRC协议数据单元(Protocol Data  Unit，PDU)的副本，以提高传输的速率或可靠性。Split承载可以是对上行路径，也可以是对下行路径的。支持对SRB1和SRB2配置为split SRB。对下行，网络侧可以根据一些准则如信道质量等决定选择哪条路径发送数据。对上行，UE根据网络侧的RRC信令配置来确定是使用MCG路径还是在两条路径上都发送。在未配置为split SRB时，SRB1和SRB2是通过MCG路径传输的。此外，在配置了DC时，也可以为SN建立SRB3，主要用于传输SN和UE之间与SCG关联的配置等。SRB3的建立和释放都是由SN来决定的，不支持对SRB3配置split SRB。UE可以同时配置split SRB1和SRB3。
快速MCG链路恢复机制：
版本16的双链接和载波聚合增强项目(参见文献RP-190452中)引入了一种快速MCG链路恢复机制。在快速MCG链路恢复机制中，当UE的MCG发生无线链路失败(Radio Link Failure，RLF)或者UE执行切换过程失败(HandOver Failure，HOF)(即MCG的T304超时)后，若UE被配置了T316(即被使能了快速MCG链路恢复)且辅小区组SCG链路质量是好的(即未发生RLF、定时器T310未在运行或不处于PSCell添加变更过程(即PSCell对应的T04不在运行)，或SCG不是被挂起状态(not suspended)，或SCG不处于去激活状态)，此时，MCG和SCG都不在被挂起(或称中断)状态或者定时器T316不在运行状态，则UE发起MCG失败信息流程，启动定时器T316，通过SCG路径(如split SRB1或SRB3)将包含MCG链路失败的信息报告的MCG失败信息(MCGFailureInformation)消息发送给主基站，而不是直接触发RRC连接重建立过程。在MCG失败信息流程中，UE会暂停MCG路径的传输，如挂起除SRB0之外所有SRB和DRB对应的MCG侧的传输，并重置MCG对应的MAC实体，并在定时器T316运行期间等待网络侧的响应。收到MCG失败信息RRC消息的主基站可以向UE发送包含同步重配置信息元素的RRC重配置消息来触发UE切换到一个新的小区或者发送RRC释放消息来释放UE的RRC连接。UE在收到上述RRC重配置消息或RRC释放消息后，停止T316， 根据收到的响应消息(RRC重配置消息或RRC释放消息)执行对应的操作。若T316超时，则UE发起RRC重建立过程。这种快速MCG链路恢复机制/过程可以应用于被配置了MR-DC(Multi-Radio access technology Dual Connectivity)的情况，比如NE-DC(NR E-UTRA Dual Connectivity)、EN-DC(E-UTRA NR Dual Connectivity)、NR DC(New Radio Dual Connectivity)、NGEN-DC(Next Generation-radio access network E-UTRA NR Dual Connectivity)、LTE DC(intra-E-UTRAN DC)等。本公开中，MCG失败信息过程/机制和快速MCG恢复过程/机制是等同的。
成功切换报告：
如前所述，版本17的新的研究项目中目的之一是引入成功切换时的切换信息报告。成功切换时的切换信息报告也简称成功切换报告(Successful Handover Report，SHR)。这是因为，在NR系统中单靠已有机制中的无线链路失败RLF报告来执行网络优化可能会使得数据收集过程变得漫长，而在切换成功时切换信息报告使得网络侧能更快获得移动性过程中的足够样本数。其次，即使是对于成功的切换场景，其移动性参数还是有进一步优化的空间的。对于成功切换信息报告内容，可以包含下述一种或多种：UE无线网络临时标识C-RNTI、源小区标识、目标小区标识、源小区或目标小区的测量结果、邻居小区测量结果、指示成功切换信息报告被触发的原因(即哪一个触发条件被满足)、随机接入过程信息以及位置信息等。所述切换成功包括用于向目标基站响应切换命令RRC重配置消息的RRC重配置完成消息成功发送或者MAC层成功完成到目标基站的随机接入过程。网络侧向UE配置用于触发成功切换报告的信息(如T310、T312、T304对应的门限值，双激活协议栈(Dual Active Protocol Stack，DAPS)切换执行过程中源小区经历了RLF)，称为SHR配置。只有根据所配置的触发信息的一个或多个触发条件满足(如收到切换命令时或执行切换时源小区的T310(或T312)的运行值与T310(或T312)的配置值的百分比超过所配置的对应的门限值，切换成功完成时的T304的运行值与T304 的配置值的百分比超过了所配置的对应的门限值，DAPS切换执行过程中(定时器T304运行时)源小区发生了RLF)时，UE才会在SHR对应的UE变量(如VarSuccessHO-Report)中记录所述成功切换的切换信息。其中，与源小区相关的触发条件如T310门限值或T312门限值由源小区配置给UE，与目标小区相关的触发条件如T304门限值由目标小区配置给UE，这些成功切换报告触发信息的配置包含在成功切换报告配置中(如successHO-config信息元素)。UE可以通过RRC消息告知网络侧其上有可用的成功切换报告(如successHO-InfoAvailable信息元素来指示)。网络侧在收到所述指示后，可以通过RRC消息(如UEInformationRequest消息中的successHO-ReportReq指示)来请求UE上报其保存的成功切换信息报告。UE会在响应RRC消息中将所保存的成功切换报告(UEInformationResponse消息中的successHO-Report)上报给网络侧。UE上保存的成功切换报告最多可以保存48小时。
在未被配置DC的场景下，切换过程成功意味着主小区的链路能够成功收到切换命令。即使此时主基站的链路状态不太好(比如收到切换命令时用于链路失败监测的定时器T310或T312已经处于运行状态)，但还是处于至少可以成功接收切换命令的状态。而在MCG失败信息过程中，MCG发生链路失败后会通过SCG链路发送MCGFailureinformation消息向主基站告知该失败，然后通过SCG链路(split SRB1或SRB3)接收来自主基站的切换命令。因为切换命令是从SCG链路上收到的，那么即使UE成功接收到了切换命令，也并不意味着主小区的链路状态是处于可以成功接收命令的状态。在快速MCG链路恢复机制下，UE在发生MCG链路的RLF后，启动定时器T316来等待网络侧的切换命令。假设T316运行时长到T时收到了切换命令，这意味着，MCG链路发生失败T时间后才收到了切换命令。而在正常情况下，该切换命令应该是在MCG RLF发生之前就下发给UE，以避免因为MCG RLF而带来的数据中断。现有的成功切换报告使得基站在收到成功切换报告后无法获知所述切换是在上述场景下发 生的，这将给切换参数的调整和优化带来不准确性。上述问题成为本公开所解决的问题。
下述各实施例基于上述问题给出解决方法，如无特殊说明，实施例之间并不是互斥的，实施例之间可以结合，或者一些概念或定义在各实施例之间是可以通用的。
实施例1
该实施例给出了一种在UE上执行的切换信息报告的配置、触发和设置方法。通过该实施例所述方法，UE从网络侧接收包含一个触发信息设置为RLF的SHR配置，使得UE可以在切换过程成功后基于该配置的触发信息触发UE记录该切换事件的切换信息SHR，以上报给网络来进行切换参数的调整和优化。
以下，对本公开的实施例1进行详细说明。图1是表示本公开的实施例1中的切换信息报告方法的示意流程图，如图1所示，本公开的实施例1中的切换信息报告方法可以包含如下步骤。
步骤101：UE从网络侧接收包含第一触发信息的SHR配置。优选地，所述第一触发信息置为true，用于指示若UE在收到切换命令或发起切换时MCG链路(PCell)处于RLF状态，那么UE在当成功完成到目标小区的切换过程时生成SHR。优选地，所述第一触发信息用sourceRLF-reporting信息元素或MCGRLF-reporting信息元素表示。
优选地，所述第一触发信息由切换过程的源小区配置。可选地，所述第一触发信息由切换过程的目标小区配置。
SHR配置如前所述，包含了用于指示UE上报成功切换信息给网络侧的配置，在NR系统中，以successHO-Config信息元素标识，包含在RRC消息中的other-config信息元素中。优选地，所述RRC消息是RRC重配置消息。
在快速MCG恢复机制时，当UE收到切换命令时MCG链路处于RLF状态也等同于UE收到切换命令时定时器T316正在运行。因此，上述步骤101中也可以表述为，所述第一触发信息置为true用于指示 若UE在收到切换命令或发起切换时定时器T316处于运行状态，那么UE在当成功完成到目标小区的切换过程时生成SHR。
当UE收到包含SHR配置的RRC消息时，UE应用该SHR配置，并认为其被配置了SHR配置。
步骤102：在UE成功完成到目标小区的切换过程时，UE执行用于SHR确定过程的操作。所述用于SHR确定过程的操作可以包括：基于SHR配置中的触发信息来判断所述触发条件是否满足以及当所述触发条件满足时保存SHR并设置对应的SHR中的内容。
结合步骤101中所述第一触发信息，执行用于SHR确定过程的操作可以包括：若SHR配置中的第一触发信息设置为true且当接收到切换命令或发起切换过程时源MCG/PCell处于RLF状态，则在用于SHR的UE变量中保存该次切换事件的成功切换信息。
优选地，执行用于SHR确定过程的操作还可以包括：若SHR配置中的第一触发信息设置为true且当接收到切换命令或发起切换过程时源MCG/PCell处于RLF状态，则设置SHR的触发原因(即SHR-cause信息元素)中的第一SHR信息为true。所述第一SHR信息用于指示所述SHR的触发原因是MCG/PCell处于RLF；或在SHR中包含第二SHR信息，所述第二SHR信息指示了MCG RLF发生的原因。可选地，所述RLF原因是随机接入问题、T310超时、T312超时、RLC达到最大重传次数等。
优选地，所述SHR配置进一步描述为在执行切换过程即执行最近的同步重配置之前(所收到或应用)的SHR配置。
优选地，所述成功完成到目标小区的切换指的的成功完成由MCG的切换过程所触发的随机接入过程。
对应于步骤101中在快速MCG恢复机制时的表述，步骤102中执行用于SHR确定过程的操作包括：若SHR配置中的第一触发信息设置为true且当接收到切换命令或发起切换过程时T316处于运行状态，则在用于SHR的UE变量中保存该次切换事件的成功切换信息。优选地，执行用于SHR确定过程的操作还包括：若SHR配置中的第 一触发信息设置为true且当接收到切换命令或发起切换过程时T316处于运行状态，则设置SHR的触发原因(即SHR-cause信息元素)中的第一SHR信息为true。所述第一SHR信息用于指示所述SHR的触发原因是T316正在运行(即UE正在执行快速MCG恢复过程)；或在SHR中包含第二SHR信息，所述第二SHR信息指示了MCG RLF发生的原因。可选地，所述RLF原因是随机接入问题、T310超时、T312超时、RLC达到最大重传次数等。
显而易见地，在步骤101和步骤102之间还包括UE接收到来自网络的切换命令并执行切换过程；或者UE执行条件重配置(Conditional Reconfiguration)评估过程，当条件重配置的触发条件满足(即在条件重配置评估过程中确定有触发小区)是执行基于条件重配置的切换过程。
实施例2
该实施例给出了一种在UE上执行的切换信息报告的触发方法。通过该实施例所述方法，UE可以在切换过程成功后基于当前MCG是否处于RLF状态来确定是否触发UE记录该切换事件的切换信息SHR，以上报给网络来进行切换参数的调整和优化。
不同于步骤101中UE需要接收来自网络侧的SHR配置中的触发信息，在该实施例中，当UE成功完成到目标小区的切换过程时，若UE判断当接收到切换命令或发起切换过程时源MCG/PCell处于RLF状态，则UE总是在用于SHR的UE变量中保存所关联的切换事件所对应的成功切换信息并设置对应的SHR中的内容。
以下，对本公开的实施例2进行详细说明。图2是表示本公开的实施例2中的切换信息报告方法的示意流程图，如图2所示，本公开的实施例2中的切换信息报告方法可以包含如下步骤。
步骤201：UE成功完成到目标小区的切换过程。
步骤202：若UE判断在接收到切换命令或发起切换过程时源MCG链路处于RLF状态，则UE在用于SHR的UE变量中保存所关联的切 换事件所对应的成功切换信息并设置对应的SHR中的内容。
优选地，所述成功完成到目标小区的切换指的的成功完成由MCG的切换过程所触发的随机接入过程。
在快速MCG恢复机制时，该实施例还可表述为当UE成功完成到目标小区的切换过程时，若UE判断当接收到切换命令或发起切换过程时T316正在运行(即UE正在执行快速MCG恢复过程)，则UE总是在用于SHR的UE变量中保存所关联的切换事件所对应的成功切换信息并设置对应的SHR中的内容。
所述SHR中的内容如前所述，可以包含下述一种或多种：UE无线网络临时标识C-RNTI、源小区标识、目标小区标识、源小区或目标小区的测量结果、邻居小区测量结果、指示成功切换信息报告被触发的原因(即哪一个触发条件被满足)、随机接入过程信息以及位置信息等。SHR中的内容也可以包括实施例1中所述第一～第二SHR信息。该实施例中并不对SHR中的内容进行限定。
显然地，该实施例中还包括UE接收到来自网络的切换命令并执行切换过程；或者UE执行条件重配置(Conditional Reconfiguration)评估过程，当条件重配置的触发条件满足(即在条件重配置评估过程中确定有触发小区)是执行基于条件重配置的切换过程。
实施例3
该实施例给出了一种在UE上执行的切换信息报告方法。通过该实施例所述方法，当切换命令是通过SCG路径成功收到的，则UE可以在成功切换报告中将相关信息上报给基站，以向网络侧提供更精确的切换信息。基站可以结合所述成功切换报告中的UE执行了快速MCG链路恢复过程的相关信息来进行切换参数的调整和优化。
以下，对本公开的实施例3进行详细说明。图3是表示本公开的实施例3中的切换信息报告方法的示意流程图，如图3所示，本公开的实施例3中的切换信息报告方法可以包含如下步骤。
在步骤301中，UE接收来自网络侧的切换命令，并执行切换。
在步骤302中，UE在成功切换报告变量中保存该次成功切换的成功切换信息，其中所述成功切换信息包括下述一项或多项：
第三SHR信息，用于指示最近一次发生RLF时的源小区的测量结果；
第四SHR信息，最近一次发生RLF时的邻居小区的测量结果。
该实施例并不限定UE确定记录SHR的触发，仅关注UE在SHR中记录上述SHR信息，因此实施例1或实施例2中所述UE触发SHR记录的方法都可与本实施例结合。
实施例4
该实施例给出了一种在UE上执行的切换信息报告方法。通过该实施例所述方法，则UE可以在成功切换报告中将前述实施例中相关信息上报给基站，以向网络侧提供更精确的切换信息。该实施例给出了UE通过RRC过程上报实施例1～3中所述切换信息报告时的方法。
以下，对本公开的实施例4进行详细说明。图4是表示本公开的实施例4中的切换信息报告方法的示意流程图，如图4所示，本公开的实施例4中的切换信息报告方法可以包含如下步骤。
步骤401：UE收到来自网络侧的UEInformationRequest消息，其中携带了用于请求UE上报所保存的成功切换报告的指示/请求(如设置为true的successHO-ReportReq信息元素)。
步骤402：UE将所保存的成功切换报告中的内容包含在UEInformationResponse消息中(其中的successHO-Report信息元素)，向网络侧发送UEInformationResponse消息。所述RRC消息中包含的成功切换报告中包含前述实施例中的第一SHR信息至第四SHR信息中的一项或多项。
实施例5
该实施例对本公开的用户设备UE进行说明。图5是表示本公开所涉及的用户设备UE的框图。如图5所示，该用户设备UE50包括处 理器501和存储器502。处理器501例如可以包括微处理器、微控制器、嵌入式处理器等。存储器502例如可以包括易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器等。存储器502上存储有程序指令。该指令在由处理器501运行时，可以执行本发明中详细描述的上述的切换信息报告方法。
上文已经结合优选实施例对本公开的方法和涉及的设备进行了描述。本领域技术人员可以理解，上面示出的方法仅是示例性的。本公开的方法并不局限于上面示出的步骤和顺序。上面示出的基站和用户设备可以包括更多的模块，例如还可以包括可以开发的或者将来开发的可用于基站、MME、或UE的模块等等。上文中示出的各种标识仅是示例性的而不是限制性的，本公开并不局限于作为这些标识的示例的具体信元。本领域技术人员根据所示实施例的教导可以进行许多变化和修改。
运行在根据本公开的设备上的程序可以是通过控制中央处理单元(CPU)来使计算机实现本公开的实施例功能的程序。该程序或由该程序处理的信息可以临时存储在易失性存储器(如随机存取存储器RAM)、硬盘驱动器(HDD)、非易失性存储器(如闪速存储器)、或其他存储器系统中。
用于实现本公开各实施例功能的程序可以记录在计算机可读记录介质上。可以通过使计算机系统读取记录在所述记录介质上的程序并执行这些程序来实现相应的功能。此处的所谓“计算机系统”可以是嵌入在该设备中的计算机系统，可以包括操作系统或硬件(如外围设备)。“计算机可读记录介质”可以是半导体记录介质、光学记录介质、磁性记录介质、短时动态存储程序的记录介质、或计算机可读的任何其他记录介质。
用在上述实施例中的设备的各种特征或功能模块可以通过电路(例如，单片或多片集成电路)来实现或执行。设计用于执行本说明书所描述的功能的电路可以包括通用处理器、数字信号处理器(DSP)、专用集 成电路(ASIC)、现场可编程门阵列(FPGA)、或其他可编程逻辑器件、分立的门或晶体管逻辑、分立的硬件组件、或上述器件的任意组合。通用处理器可以是微处理器，也可以是任何现有的处理器、控制器、微控制器、或状态机。上述电路可以是数字电路，也可以是模拟电路。因半导体技术的进步而出现了替代现有集成电路的新的集成电路技术的情况下，本公开的一个或多个实施例也可以使用这些新的集成电路技术来实现。
此外，本公开并不局限于上述实施例。尽管已经描述了所述实施例的各种示例，但本公开并不局限于此。安装在室内或室外的固定或非移动电子设备可以用作终端设备或通信设备，如AV设备、厨房设备、清洁设备、空调、办公设备、自动贩售机、以及其他家用电器等。
如上，已经参考附图对本公开的实施例进行了详细描述。但是，具体的结构并不局限于上述实施例，本公开也包括不偏离本公开主旨的任何设计改动。另外，可以在权利要求的范围内对本公开进行多种改动，通过适当地组合不同实施例所公开的技术手段所得到的实施例也包含在本公开的技术范围内。此外，上述实施例中所描述的具有相同效果的组件可以相互替代。

Claims (10)

  1. 一种切换信息报告方法，包括：
    用户设备UE从网络侧接收包含第一触发信息的成功切换报告SHR配置；
    在所述UE成功完成到目标小区的切换过程时，所述UE执行用于SHR确定过程的操作；
    其中，所述第一触发信息用于指示：若UE在收到切换命令或发起切换时主小区组MCG链路处于无线链路失败RLF状态，则UE在成功完成到目标小区的切换过程时生成SHR。
  2. 根据权利要求1所述的切换信息报告方法，其中，
    所述第一触发信息通过sourceRLF-reporting信息元素或MCGRLF-reporting信息元素表示。
  3. 根据权利要求1或者2所述的切换信息报告方法，其中，
    所述第一触发信息由切换过程的源小区配置。
  4. 根据权利要求1或者2所述的切换信息报告方法，其中，
    所述用于SHR确定过程的操作包含：基于所述SHR配置中的触发信息来判断触发条件是否满足、以及当所述触发条件满足时保存SHR并设置对应的SHR中的内容。
  5. 根据权利要求1或者2所述的切换信息报告方法，其中，
    所述用于SHR确定过程的操作包括：若所述SHR配置中的所述第一触发信息设置为true且当接收到切换命令或发起切换过程时源MCG链路处于RLF状态，则在用于SHR的UE变量中保存该次切换事件的成功切换信息。
  6. 根据权利要求1或者2所述的切换信息报告方法，其中，
    所述SHR包含如下的至少一个信息：
    第一SHR信息，用于指示所述SHR的触发原因是MCG链路处于RLF；
    第二SHR信息，用于指示MCG RLF发生的原因；
    第三SHR信息，用于指示最近一次发生RLF时的源小区的测量结果；
    第四SHR信息，用于指示最近一次发生RLF时的邻居小区的测量结果。
  7. 根据权利要求1或者2所述的切换信息报告方法，其中，
    所述切换信息报告方法还包括：
    所述UE收到来自网络侧的UEInformationRequest消息，所述UEInformationRequest消息携带了用于请求UE上报所保存的SHR的指示/请求；和
    所述UE将所保存的SHR中的内容包含在UEInformationResponse消息中，向网络侧发送UEInformationResponse消息。
  8. 一种切换信息报告方法，包括：
    用户设备UE成功完成到目标小区的切换过程；
    若所述UE判断在接收到切换命令或发起切换过程时源MCG链路处于无线链路失败RLF状态，则所述UE在用于成功切换报告
    SHR的UE变量中保存所关联的切换事件所对应的成功切换信息并设置对应的SHR中的内容。
  9. 根据权利要求8所述的切换信息报告方法，其中，
    所述SHR包含如下的至少一个信息：
    第一SHR信息，用于指示所述SHR的触发原因是MCG链路处于RLF；
    第二SHR信息，用于指示MCG RLF发生的原因；
    第三SHR信息，用于指示最近一次发生RLF时的源小区的测量结果；
    第四SHR信息，用于指示最近一次发生RLF时的邻居小区的测量结果。
  10. 一种用户设备，包括：
    处理器；以及
    存储器，所述存储器上存储有指令；
    其中，所述指令在由所述处理器运行时，使所述用户设备执行根据权利要求1-9中任意一项所述的切换信息报告方法。
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Publication number Priority date Publication date Assignee Title
CN115835318A (zh) * 2021-09-17 2023-03-21 夏普株式会社 切换信息报告方法以及用户设备

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Publication number Priority date Publication date Assignee Title
CN115835318A (zh) * 2021-09-17 2023-03-21 夏普株式会社 切换信息报告方法以及用户设备

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NEC: "Discussion on successful handover report", 3GPP TSG-RAN WG2 #113 ELECTRONIC R2-2100748, 15 January 2021 (2021-01-15), XP051973856 *
NOKIA, NOKIA SHANGHAI BELL: "Clarification on SHR for DAPS HO", 3GPP TSG-RAN WG2 MEETING #118 ELECTRONIC R2-2204880, 25 April 2022 (2022-04-25), XP052142742 *
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