WO2023040955A1 - 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
WO2023040955A1
WO2023040955A1 PCT/CN2022/119012 CN2022119012W WO2023040955A1 WO 2023040955 A1 WO2023040955 A1 WO 2023040955A1 CN 2022119012 W CN2022119012 W CN 2022119012W WO 2023040955 A1 WO2023040955 A1 WO 2023040955A1
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handover
information
successful
report
scg
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PCT/CN2022/119012
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English (en)
French (fr)
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常宁娟
刘仁茂
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夏普株式会社
常宁娟
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Definitions

  • the present disclosure relates to the field of wireless communication technologies, and more specifically, the present disclosure relates to a method for reporting handover information in a case of handover and a corresponding user equipment.
  • the present disclosure proposes a solution to the problem of how to implement handover information reporting in the NR system.
  • the purpose of the embodiments of the present disclosure is to propose a solution to the problem of how to implement switching information reporting in the NR system. More specifically, the present disclosure proposes a solution to the problem of how to record handover information when the UE is configured with dual connectivity (Dual Connectivity, DC) in the NR system.
  • Embodiments of the present disclosure provide a method for reporting handover information performed in a user equipment and a corresponding user equipment.
  • a handover information reporting method including: the user equipment UE receives a handover command from the network side, and performs handover based on the handover command; the UE judges that it is used to trigger a successful handover report When at least one of the triggering conditions is met, the UE saves the successful handover information in the successful handover report; if the handover command corresponding to the handover process is successfully received through the secondary cell group SCG link or the UE is configured with dual connectivity DC, then the successful handover report includes first information, where the first information is used to indicate the status of the SCG link when the handover command is successfully received.
  • the successful handover report may further include second information, and the second information is used to indicate the latest measurement result of the SCG cell when the handover command is successfully received.
  • the successful handover report may include third information, and the third information is used to indicate that the handover command was successfully received over the SCG link.
  • the trigger conditions may include: T310 exceeds the configured threshold value, T312 exceeds the configured threshold value, T304 exceeds the configured threshold value, random access used in the handover process
  • the incoming resource is not the dedicated random access resource configured in the handover command, the UE is configured with a DC, and the handover command corresponding to the handover process is successfully received through the SCG link.
  • the SCG state may indicate whether the T310 corresponding to the SCG is running, the running value of the T310 corresponding to the SCG, whether the T310 corresponding to the SCG has timed out, the Whether the SCG is in the SCG Failed or Suspended state.
  • the UE when the UE receives the UEInformationRequest message including the successful handover report request indication from the network side, it may include the stored content of the successful handover report in the UEInformationResponse message, and Send to the network side.
  • a method for reporting handover information including: the user equipment UE receives a handover command from the network side, and performs handover based on the handover command; the UE judges that it is used to trigger a successful handover report If at least one of the trigger conditions is met, the UE saves the successful handover information in the successful handover report; if the handover command corresponding to the handover process is a response to the failure information of the primary cell group MCG , the fourth information is included in the successful handover report, and the fourth information is used to indicate that the MCG is in the radio link failure RLF state when the handover command is successfully received.
  • the successful handover report may further include fifth information, and the fifth information is used to indicate the running value of T316 when the handover command is successfully received.
  • the successful handover report may further include sixth information, the The sixth information is used to indicate that the running value of T316 exceeds the threshold value of T316 when the switching command is successfully received.
  • a user equipment UE including: a processor; and a memory storing instructions; wherein, when executed by the processor, the instructions perform handover information reporting according to the context method.
  • FIG. 1 is a schematic diagram showing a transmission path of a split bearer.
  • FIG. 2 is a flowchart showing a handover information reporting method in Embodiment 1 as an example of the present invention.
  • FIG. 3 is a flowchart showing a handover information reporting method in Embodiment 2 of the present invention as an example.
  • FIG. 4 is a block diagram illustrating a user equipment UE involved in 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 change of the primary cell of the UE from the source cell to the target cell, where the source cell It can be the same cell as the target cell or a different cell.
  • the secret key or security algorithm used for access layer security can also be updated or not updated accordingly.
  • the security includes encryption, decryption and integrity protection.
  • the source cell can also be called the source base station, or the source beam (beam), the source transmission point (Transmission point, TRP), the source main cell (Primary Cell, PCell), the source main cell group (Master Cell Group, MCG); the target A cell may also be called a target base station, or a target beam, a target transmission point, a target primary cell PCell, or a target cell group MCG.
  • the source cell refers to the cell serving the UE connected before the handover process is initiated, that is, the cell that sends a radio resource control (Radio Resource Control, RRC) message including a handover command to the UE.
  • RRC Radio Resource Control
  • the target cell refers to the cell to which the UE is connected to serve the UE 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 synchronous reconfiguration (Reconfigurationwithsync) information element.
  • RRC reconfiguration message of the Reconfigurationwithsync) information element At this time, handover may also be referred to as synchronous reconfiguration of the MCG.
  • the synchronous reconfiguration information element or the mobility control information element may include configuration information of the target cell, such as target cell identity, target cell frequency, public configuration of the target cell such as system information, and 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 RRC reconfiguration message in this disclosure is equivalent to the RRC connection reconfiguration message; similarly, the response message RRC reconfiguration complete message is identical to the RRC connection reconfiguration complete message.
  • the handover command is equivalent to the RRC message containing the handover command, and refers to the RRC message or the configuration in the RRC message that triggers the UE to perform handover.
  • the switching configuration refers to all or part of the configuration in the switching command. Cancel, Release, Delete, Empty and Clear etc. can be substituted. Execution, use, and application are interchangeable. Configuration and reconfiguration can be replaced. Monitor and detect are interchangeable.
  • the RRC re-establishment message is identical to the RRC connection re-establishment message; similarly, its response message, the RRC re-establishment complete message, is identical to 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 Section 6.2.2 of the 3GPP technical standard protocol 38.331):
  • Measurement configuration used to configure intra-frequency, inter-frequency and inter-RAT measurements performed by the UE.
  • cellGroupConfig information element used to configure a primary cell group or a secondary cell group.
  • Radio Link Control Radio Link Control, RLC
  • RLC Radio Link Control
  • MAC Medium Access Control
  • MAC-cellgroupconfig information element physical layer configuration
  • secondary cell addition/modification/release configuration special cell (Special cell, SpCell) configuration, etc.
  • the SpCell configuration includes cell index number, handover information (reconfigurationWithSync information element), radio link failure-related timer and constant configuration, radio link monitoring (Radio Link Monitoring, RLM) configuration, special cell-specific configuration, etc.
  • the reconfigurationwithsync information element is similar to the mobile control information in the LTE system, including handover related information to achieve mobility, which includes serving cell configuration public information, UE's cell radio network temporary identifier C-RNTI in the target cell, and handover process monitoring timer T304 configuration, random access dedicated configuration for the random access process to the target cell, etc.
  • Radio bearerConfig 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 signaling radio bearer (Signaling Radio Bearer, SRB) ) and Packet Data Convergence Protocol (PDCP).
  • SDAP Service Data Application Protocol
  • DRB Data Radio Bearer
  • SRB Signaling Radio Bearer
  • PDCP Packet Data Convergence Protocol
  • a general handover process refers to a process in which a UE in the RRC connected state changes a serving cell (primary cell).
  • a general handover process includes the following phases: Phase 1: Measurement phase. Based on the configured measurement configuration, the UE measures the radio link corresponding to the serving cell or the neighboring cell, and when the configured measurement reporting conditions are met, the UE sends a measurement report to the base station.
  • Phase 3 Switch execution phase.
  • the source base station sends 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 that 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 in the two base stations.
  • the wireless access between the two base stations and the UE can be the same or different standards (Radio Access Technology, RAT), such as NR, or one is NR, and the other is LTE, also known as the evolved universal terrestrial radio access ( Evolved Universal Terrestrial Radio Access, E-UTRA).
  • RAT Radio Access Technology
  • NR Radio Access Technology
  • LTE also known as the evolved universal terrestrial radio access
  • Evolved Universal Terrestrial Radio Access, E-UTRA evolved Universal Terrestrial Radio Access
  • the master base station Master Node, MN
  • MgNB MgNB
  • MeNB serving cell group under the master base station
  • the secondary base station Secondary Node, SN
  • SgNB SeNB
  • the serving cell group under the secondary base station is called secondary cell group (Secondary Cell Group, SCG).
  • EN-DC using 4G core network
  • NGEN-DC using 5G core network
  • the DC is called NR-DC .
  • the 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 the connection re-establishment process through the main frequency.
  • SCG includes a PSCell and optionally one or more SCells.
  • the PSCell refers to an SCG cell to which the UE performs random access when performing a synchronous reconfiguration procedure or an SCG addition procedure.
  • the PCell and the PSCell are also collectively referred to as the special cell SpCell.
  • split SRB supports transmission through two paths, MCG and SCG.
  • RRC protocol data unit Protocol Data Unit, PDU
  • the split bearer can be for the uplink path or the downlink path.
  • Support SRB1 and SRB2 configured as split SRB.
  • the network side can decide which path to choose to send data according to 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.
  • SRB1 and SRB2 are transmitted through the MCG path.
  • an SRB3 may also be established for the SN 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, and the configuration of split SRB for SRB3 is not supported. The UE can configure split SRB1 and SRB3 at the same time.
  • the UE will initiate an RRC connection reconnection after the radio link failure (Radio Link Failure, RLF) of the primary cell group or the UE fails to execute the handover process (HandOver Failure, HOF) (that is, T304 timeout).
  • RLF Radio Link Failure
  • HOF Handover Failure
  • a procedure is established to re-establish/restore the connection to the network side.
  • the UE first performs a cell selection process to select a re-established cell, and sends an RRC connection re-establishment request message to it.
  • the UE When the UE receives the response message as the RRC connection re-establishment message, the UE re-establishes the RRC connection according to the configuration in the RRC connection re-establishment message, and feeds back the RRC connection re-establishment complete message to the base station, successfully ending the RRC connection re-establishment process.
  • the Dual Link and Carrier Aggregation Enhancement Project of Release 16 introduces a fast MCG link recovery mechanism.
  • the so-called “fast” is relative to directly recovering the link connection through the RRC connection re-establishment process.
  • the UE initiates the MCG Failure information flow, start timer T316, send the MCG failure information (MCGFailureInformation) message containing the information report of MCG link failure to the primary base station through the SCG path (such as split SRB1 or SRB3), instead of directly triggering the RRC connection re-establishment process .
  • MCG failure information MCGFailureInformation
  • the UE will suspend the transmission of the MCG path, such as suspending the transmission of the MCG side corresponding to all SRBs and DRBs except SRB0, and reset the MAC entity corresponding to the MCG, and wait during the running of the timer T316 Response from the network side.
  • the master base station can send an RRC reconfiguration message containing a synchronous 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 RRC connection of the UE.
  • the UE stops T316, and performs corresponding operations according to the received response message.
  • This fast MCG link recovery mechanism/process can be applied to the situation 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 upon successful handover is also referred to as the Successful Handover Report (Successful Handover Report, SHR).
  • SHR Successful Handover Report
  • the source cell identifier For the content of the successful handover information report, one or more of the following may be included: the source cell identifier; the target cell identifier; the measurement result of the source cell or the target cell; the neighbor cell measurement result; which trigger condition is met); the operation of T310/T312 (indicating whether T310 and/or T312 exceeds the configured threshold value); beam failure monitoring when receiving the handover command; performing random access to the target base station The best one or more beam identifiers; the running status/value of the T304 timer when the handover is successfully completed; and random access process information, etc.
  • the handover success includes successfully sending the RRC reconfiguration complete message for responding to the handover command RRC reconfiguration message to the target base station or successfully completing the random access process to the target base station by the MAC layer.
  • the network side needs to configure the trigger conditions for the successful handover report to the UE (such as the threshold values corresponding to T310, T312, and T304), only when one or more configured trigger conditions are met (such as T310 or T312 of the source cell when the handover command is received)
  • the operating value of T304 exceeds the corresponding configured threshold value, and the operating value of T304 when the handover is successfully completed exceeds the corresponding configured threshold value), the UE will record the handover information of the successful handover.
  • the UE can notify the network side that there is a successful handover report available on it through the RRC message (as indicated by the SuccHORep-Available information element).
  • the network side may request the UE to report its stored successful handover information report through an RRC message (such as the SuccessfulHOReportReq indication in the UEInformationRequest message).
  • the UE will report the saved radio link failure report (SuccessfulHOReport in the UEInformationResponse message) to the network side in the response RRC message.
  • the successful handover report saved on the UE can be saved for up to 48 hours.
  • the success of the handover process means that the link of the primary cell can successfully receive the handover command. Even if the link status of the master base station is not very good at this time (such as the timer T310 or T312 used for link failure monitoring when receiving the handover command), it is still at least in a state where the handover command can be successfully received.
  • the network side can send the handover command to the UE through the SCG path in two cases.
  • One case is when the primary base station link is configured with split SRB and the primary base station link has not yet experienced a radio link failure.
  • the primary base station issues the handover command through the secondary base station path of the split SRB.
  • the primary base station issues the handover command through the secondary base station path of the split SRB or SRB3. Because the handover command is received from the link of the secondary base station, even if the UE successfully receives the handover command, it does not mean that the link state of the primary cell is in a state where the command can be successfully received.
  • different handover parameters may be used based on whether the DC is configured. For example, in the scenario where no DC is configured, the corresponding handover parameters can be relatively conservative values, that is, handover needs to be triggered before the link status of the primary base station is good and no problems occur.
  • the corresponding handover parameters can be set relatively later, because when the primary base station link is not in good condition, it is still allowed to send the handover command through the secondary base station link . Then, for the successful handover reports that occur in these two cases, the network side can adopt different parameter adjustment methods.
  • the current successful handover report does not consider the DC scenario, and the successful handover report is not necessarily reported to the base station related to the handover immediately after the successful handover, but may arrive at the base station related to the handover after a period of time , and the context information of the UE has been deleted on the base station at this time, which leads to the fact that based on the current successful handover report, when the base station receives a successful handover report, it cannot know whether the corresponding handover is configured with a DC, or whether the handover command is From which path it was received.
  • the UE runs T316 to wait for a handover command from the network side.
  • the handover command is received when T316 runs for T, which means that the handover command is received after T time has elapsed since the failure of the MCG link.
  • the handover command should be sent to the UE before MCG RLF to avoid data interruption caused by MCG RLF.
  • the existing successful handover report makes it impossible for the base station to know that the handover occurs in the above scenario after receiving the successful handover report, which will bring inaccuracy to the adjustment and optimization of handover parameters. The above problems are successfully solved by the present disclosure.
  • This embodiment provides a method for reporting handover information performed on a UE.
  • the UE when the UE is configured with a DC, if the handover command is successfully received through the SCG path, the UE can report the relevant information to the base station in the successful handover report to provide more information to the network side. Precise switching information.
  • the base station may adjust and optimize handover parameters in combination with DC related information in the successful handover report.
  • FIG. 2 is a flowchart showing a handover information reporting method in Embodiment 1 as an example of the present invention.
  • the UE receives a handover command from the network side and performs handover.
  • the handover command includes the configuration of one or more trigger conditions (such as threshold values of T310/T312/T304) for triggering a successful handover report.
  • the trigger condition includes that T310 exceeds the configured threshold, T312 exceeds the configured threshold, T304 exceeds the configured threshold, and the random access resource used in the handover process is not the dedicated resource configured in the handover command. Random access resources, the UE is configured with a DC, or the handover command corresponding to the handover process is successfully received through the SCG link, etc.
  • step 2 the UE determines that one or more of the triggering conditions for triggering the successful handover report is met, and then the UE saves the successful handover information in the successful handover report variable.
  • the UE determines that one or more of the triggering conditions for triggering the successful handover report is met, and then the UE saves the successful handover information in the successful handover report variable.
  • the successful handover report includes first information, which is used to indicate that the SCG link when the handover command is successfully received status.
  • the SCG state may be whether the T310 corresponding to the SCG is running, the running value of the T310 corresponding to the SCG, whether the T310 corresponding to the SCG has timed out, or whether the SCG is in an SCG failure state (such as RLF) or a suspended state.
  • the successful handover report contains the second information, which is used to indicate the latest SCG cell when the handover command is successfully received. measurement results.
  • the SCG cell refers to a PSCell.
  • the SCG cells include one or more cells with the best link quality among all serving cells of the SCG.
  • the SCG includes all serving cells of the SCG. It can be known that the third information also includes a cell identifier of the SCG cell, or an indicator indicating that the cell is an SCG cell.
  • the successful handover report includes third information for indicating that the handover command is successfully received through the SCG link.
  • the successful handover report includes one or more of the above first to third information.
  • This embodiment provides a method for reporting handover information performed on a UE.
  • the UE executes the fast MCG link recovery mechanism, when the handover command is successfully received through the SCG path as a response to the MCG failure information, the UE can report the relevant The information is reported to the base station to provide more accurate handover information to the network side.
  • the base station can adjust and optimize the handover parameters in combination with the relevant information that the UE has performed the fast MCG link recovery process in the successful handover report.
  • FIG. 3 is a flowchart showing a handover information reporting method in Embodiment 2 of the present invention as an example.
  • the UE receives a handover command from the network side and performs handover.
  • the handover command includes the configuration of one or more trigger conditions (such as threshold values of T310/T312/T304) for triggering a successful handover report.
  • the trigger condition includes that T310 exceeds the configured threshold, T312 exceeds the configured threshold, T304 exceeds the configured threshold, and the random access resource used in the handover process is not the dedicated resource configured in the handover command. Random access to resources and handover commands are responses to MCG failure information, and T316 exceeds the configured threshold.
  • step 2 the UE determines that one or more of the trigger conditions used to trigger the successful handover report is met, and then the UE stores the successful handover information in the variable of the successful handover report, including:
  • the fourth information is included in the successful handover report, which is used to indicate that the MCG is in the RLF state when the handover command is successfully received.
  • the trigger condition is met, that is, the T316 operation value when the handover command is received exceeds the T316 gate limit value, the fifth information is included in the successful handover report, which is used to indicate the running value of T316 when the handover command is successfully received;
  • the trigger condition is the T316 threshold value
  • the trigger condition is met, that is, the T316 operation value when the handover command is received exceeds the T316 gate limit value
  • the sixth information is included in the successful handover report, which is used to indicate that the running value of T316 exceeds the T316 threshold when the handover command is successfully received.
  • the handover command is a response to the MCG failure information, which means that the UE has a running T316 timer when successfully receiving the handover command.
  • This embodiment provides a method for reporting handover information performed on a UE.
  • the UE can report DC-related information 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 Embodiment 1 or Embodiment 2 through the RRC process.
  • Step 1 The UE receives a UEInformationRequest message from the network side, which carries an indication/request for requesting the UE to report the stored handover success report.
  • Step 2 The UE includes the stored content of the successful handover report in the UEInformationResponse message, and sends the UEInformationResponse message to the network side.
  • the successful handover report included in the RRC message includes one or more items of the first information to the sixth information in the foregoing embodiments.
  • FIG. 4 is a block diagram showing a user equipment UE according to the present invention.
  • the user equipment UE40 includes a processor 401 and a memory 402 .
  • the processor 401 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like.
  • the memory 402 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a nonvolatile memory (such as a flash memory), or other memories.
  • Memory 402 has program instructions stored thereon. When the instruction is executed by the processor 401, it can execute the above-mentioned handover information reporting method described in detail in the present invention.
  • the methods and related devices of the present disclosure have been described above in conjunction with preferred embodiments. Those skilled in the art can understand that the methods shown above are only exemplary. The methods of the present disclosure are not limited to the steps and order 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 the like.
  • the various identifiers shown above are only exemplary rather than restrictive, and the present disclosure is not limited to specific information elements as examples of these identifiers. Numerous variations 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 a computer to realize 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.
  • a program for realizing the functions of the embodiments of the present disclosure can be recorded on a computer-readable recording medium.
  • the corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the 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 recording medium in which a short-term dynamic storage program is stored, or any other recording medium readable by a computer.
  • circuits for example, single-chip or multi-chip integrated circuits.
  • Circuits designed to perform the functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above.
  • DSPs digital signal processors
  • ASICs application-specific integrated circuits
  • FPGAs field-programmable gate arrays
  • a general-purpose processor can be a microprocessor, or it can be any existing processor, controller, microcontroller, or state machine.
  • the above-mentioned circuits may be digital circuits or analog circuits. Where new integrated circuit technologies have emerged to replace existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present disclosure may also be implemented using these new integrated circuit technologies.
  • present disclosure is not limited to the above-described embodiments. Although various examples of the embodiments have been described, the present disclosure is not limited thereto.
  • Fixed or non-mobile electronic equipment installed indoors or outdoors can be used as terminal equipment or communication equipment, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

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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接收来自网络侧的切换命令，并基于所述切换命令执行切换；在所述UE判断用于触发成功切换报告的触发条件中的至少一个条件满足的情况下，所述UE在所述成功切换报告中保存该次成功切换的信息；若该切换过程所对应的切换命令是通过辅小区组SCG链路成功接收的或者所述UE被配置了双连接DC，则在所述成功切换报告中包含第一信息，其中，所述第一信息用于指示所述切换命令成功接收时所述SCG链路的状态。

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，本公开涉及切换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
2019年12月，在第三代合作伙伴计划(3rd Generation Partnership Project：3GPP)RAN#86次全会上批准了一个Release 17技术标准的新的研究项目(参见非专利文献：RP-193255：New WID on enhancement of data collection for SON/MDT in NR)。这个项目的研究目的是对NR系统中的网络数据收集过程进行增强，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成功切换场景下的切换信息报告。
本公开针对在NR系统中如何实现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系统中如何在UE配置了双连接(Dual Connectivity，DC)时的切换信息的记录问题提出了解决方法。本公开实施例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接收来自网络侧的切换命令，并基于所述切换命令执行切换；在所述UE判断用于触发成功切换报告的触发条件中的至少一个条件满足的情况下，所述UE在所述成功切换报告中保存该次成功切换的信息；若该切换过程所对应的切换命令是通过辅小区组SCG链路成功接收的或者所述UE被配置了双连接DC，则在所述成功切换报 告中包含第一信息，其中，所述第一信息用于指示所述切换命令成功接收时所述SCG链路的状态。
在上述第一方面的切换信息报告方法中，所述所述成功切换报告中可以还包含第二信息，所述第二信息用于指示所述切换命令成功接收时SCG小区的最新的测量结果。
在上述第一方面的切换信息报告方法中，若该切换过程所对应的切换命令是通过SCG链路成功接收的，则在所述成功切换报告中可以包含第三信息，所述第三信息用于指示所述切换命令是通过SCG链路成功接收的。
在上述第一方面的切换信息报告方法中，所述触发条件可以包含：T310超过配置的门限值、T312超过配置的门限值、T304超过配置的门限值、切换过程所使用的随机接入资源不是切换命令中所配置的专用随机接入资源、所述UE被配置了DC、该切换过程所对应的切换命令是通过SCG链路成功接收的。
在上述第一方面的切换信息报告方法中，所述SCG状态可以表示所述SCG对应的T310是否正在运行、所述SCG对应的T310的运行的值、所述SCG对应的T310是否超时、所述SCG是否处于SCG失败状态或挂起状态。
在上述第一方面的切换信息报告方法中，所述UE在从网络侧接收到包含成功切换报告请求指示的UEInformationRequest消息时，可以将所保存的成功切换报告中的内容包含在UEInformationResponse消息中，并向网络侧进行发送。
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接收来自网络侧的切换命令，并基于所述切换命令执行切换；在所述UE判断用于触发成功切换报告的触发条件中的至少一个条件满足的情况下，所述UE在所述成功切换报告中保存该次成功切换的信息；若该切换过程所对应的切换命令是作为主小区组MCG失败信息的响应，则在所述成功切换报告中包含第四信息，所述第四信息用于指示所述切换命令成功接收时MCG处于无线链路失败RLF 状态。
在上述第二方面的切换信息报告方法中，在所述成功切换报告中可以还包含第五信息，所述第五信息用于指示所述切换命令成功接收时T316的运行值。
在上述第二方面的切换信息报告方法中，在接收到切换命令时的T316的运行值超过了所述T316的门限值时，在所述成功切换报告中可以还包含第六信息，所述第六信息用于指示所述切换命令成功接收时T316的运行值超过了所述T316门限值。
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是表示分裂承载的传输路径的示意图。
图2是表示本发明的作为一例的实施例1中的切换信息报告方法的流程图。
图3是表示本发明的作为一例的实施例2中的切换信息报告方法的流程图。
图4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系统也用于指代5G及其之后的LTE系统(如称为eLTE系统，或者可以连接到5G核心网的LTE系统)，同时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)。图1表示分裂承载的传输路径的示意图。如图1所示，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，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15及之前的系统中，UE在发生主小区组的无线链路失败(Radio Link Failure，RLF)或者UE执行切换过程失败(HandOver Failure，HOF)(即T304超时)后，会发起RRC连接重建立过程来重建/恢复与网络侧的连接。在发起的RRC连接重建立过程中，UE先执行小区选择过程来选择一个重建小区，并向其发送RRC连接重建立请求消息。当UE收到响应消息为RRC连接重建消息时，UE根据RRC连接重建消息中的配置来重建立RRC连接，并向基站反馈RRC连接重建完成消息，成功结束所述RRC连接重建立过程。
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。所谓“快速”是相对于直接通过RRC连接重建立过程来恢复链路连接而言的。在快速MCG链路恢复机制中，当UE的MCG发生RLF时，若UE的辅小区组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变更过程(即SCG对应的T04不在运行)，或SCG不是被挂起状态(not suspended))，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执行对应的操作。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失败信息过程和快速MCG链路恢复过程是等同的。
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：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)；T310/T312的运行情况(指示T310和/或T312是否超过配置的门限值)；接收到切换命令时的波束失败监测情况；执行到目标基站的随机接入时下行最好的一个或多个波束标识；切换成功完成时的T304定时器的运行状态/值；以及随机接入过程信息等。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。网络侧需要向UE配置成功切换报告的触发条件(如T310、T312、T304对应的门限值)，只有当配置的一个或多个触发条件满足(如收到切换命令时源小区的T310 或T312的运行值超过所配置的对应的门限值，切换成功完成时的T304的运行值超过了所配置的对应的门限值)时，UE才会记录所述成功切换的切换信息。在目前3GPP已达成的结论中，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SuccHORep-Available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SuccessfulHOReportReq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消息中将所保存的无线链路失败报告(UEInformationResponse消息中的SuccessfulHOReport)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)，但还是处于至少可以成功接收切换命令的状态。在配置了DC时，在两种情况下网络侧可以通过SCG路径将切换命令发送给UE，一种情况是在主基站链路配置了split SRB且主基站链路尚未发生无线链路失败时，主基站通过split SRB的辅基站路径来下发切换命令，另一种情况是在MCG失败信息过程中，主机站通过split SRB的辅基站路径或SRB3来下发切换命令。因为切换命令是从辅基站链路上收到的，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。此外，在网络侧的一种实现中，是可以基于是否配置DC使用不同的切换参数的。例如在未配置DC场景下，对应的切换参数可以是相对保守的值，即在主基站链路状态较好未出现问题之前就需要触发切换。而在配置了DC场景下，结合当前辅基站链路的情况，对应的切换参数可以设置相对晚一些，因为在主基站链路状态不太好时，依然允许通过辅基站链路来发送切换命令。那么对于发生在这两种情况下的成功切换报告，网络侧是可以采用不同的参数调整方法的。但目前的成功切换报告并未考虑DC场景，且成功切换报告并不一定是在成功切换后立即上报给本次切换相关的基站的，而可 能在切换发生一段时间后到达此次切换相关的基站，而此时基站上已经删除了该UE的上下文信息，这就导致基于目前的成功切换报告，基站在收到一个成功切换报告时，无法获知所对应的切换是否配置了DC，或切换命令是从哪个路径被收到的。此外，在快速MCG链路恢复机制下，UE在MCG链路发生RLF后，运行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时间后才收到的切换命令。而在正常情况下，该切换命令应该是在MCG RLF之前就下发给UE，以避免因为MCG RLF而带来的数据中断。而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。上述问题则成功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方法。通过该实施例所述方法，UE在配置了DC的情况下，若切换命令是通过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DC相关信息来进行切换参数的调整和优化。
以下，基于图2对本发明的实施例1进行说明。图2是表示本发明的作为一例的实施例1中的切换信息报告方法的流程图。
如图2所示，在步骤1中，UE接收来自网络侧的切换命令，并执行切换。可选地，所述切换命令中包含了用于触发成功切换报告的一个或多个触发条件的配置(如T310/T312/T304的门限值)。可选地，所述触发条件包含T310超过配置的门限值、T312超过配置的门限值、T304超过配置的门限值、切换过程所使用的随机接入资源不是切换命令中所配置的专用随机接入资源、UE被配置了DC或该切换过程所对 应的切换命令是通过SCG链路成功接收的等。
在步骤2中，UE确定用于触发成功切换报告的触发条件中的一个或多个满足，则UE在成功切换报告变量中保存该次成功切换的信息。其中包括：
若该切换过程所对应的切换命令是通过SCG链路成功接收的或UE被配置了DC，则在成功切换报告中包含第一信息，用于指示所述切换命令成功接收时所述SCG链路的状态。所述SCG状态可以是SCG对应的T310是否正在运行、所述SCG对应的T310的运行的值、SCG对应的T310是否超时或所述SCG是否处于SCG失败状态(如RLF)或挂起状态。
若该切换过程所对应的切换命令是通过SCG链路成功接收的或UE被配置了DC，则在成功切换报告中包含第二信息，用于指示所述切换命令成功接收时SCG小区的最新的测量结果。可选地，所述SCG小区指PSCell。可选地，所述SCG小区包含SCG的所有服务小区中链路质量最好的一个或多个小区。可选地，所述SCG包含SCG的所有服务小区。由此可知，所述第三信息还包括SCG小区的小区标识，或者指示该小区为SCG小区的指示符。
若该切换过程所对应的切换命令是通过SCG链路成功接收的，则在成功切换报告中包含第三信息，用于指示所述切换命令是通过SCG链路成功接收的。
可选地，UE在被配置了split SRB1或SRB3时在成功切换报告中包含上述第一至第三信息中的一个或多个。
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方法。通过该实施例所述方法，UE在执行了快速MCG链路恢复机制的情况下，当切换命令是作为MCG失败信息的响应通过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，基于图3对本发明的实施例2进行说明。图3是表示本发明的作为一例的实施例2中的切换信息报告方法的流程图。
如图3所示，在步骤1中，UE接收来自网络侧的切换命令，并执行切换。可选地，所述切换命令中包含了用于触发成功切换报告的一个或多个触发条件的配置(如T310/T312/T304的门限值)。可选地，所述触发条件包含T310超过配置的门限值、T312超过配置的门限值、T304超过配置的门限值、切换过程所使用的随机接入资源不是切换命令中所配置的专用随机接入资源、切换命令是作为MCG失败信息的响应、T316超过配置的门限值等。
在步骤2中，UE确定用于触发成功切换报告的触发条件中的一个或多个满足，则UE在成功切换报告变量中保存该次成功切换的信息，其中包括：
若该切换过程所对应的切换命令是作为MCG失败信息的响应，则在成功切换报告中包含第四信息，用于指示所述切换命令成功接收时MCG处于RLF状态。
若该切换过程所对应的切换命令是作为MCG失败信息的响应，或所述触发条件为T316门限值时，该触发条件满足即接收到切换命令时的T316的运行值超过了所述T316门限值，则在成功切换报告中包含第五信息，用于指示所述切换命令成功接收时T316的运行值；
若该切换过程所对应的切换命令是作为MCG失败信息的响应，或所述触发条件为T316门限值时，该触发条件满足即接收到切换命令时的T316的运行值超过了所述T316门限值，则在成功切换报告中包含第六信息，用于指示所述切换命令成功接收时T316的运行值超过了所述T316门限值。
所述切换命令是作为MCG失败信息的响应，指的是UE在成功接收到切换命令时有正在运行的T316定时器。
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，则UE可以在成功切换报告中将DC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或实施例2中所述切换信息报告时的方法。
步骤1：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。
步骤2：UE将所保存的成功切换报告中的内容包含在UEInformationResponse消息中，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信息至第六信息中的一项或多项。
实施例4：
该实施例对本公开的用户设备UE进行说明。图4是表示本发明所涉及的用户设备UE的框图。如图4所示，该用户设备UE40包括处理器401和存储器402。处理器401例如可以包括微处理器、微控制器、嵌入式处理器等。存储器402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402上存储有程序指令。该指令在由处理器401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接收来自网络侧的切换命令，并基于所述切换命令执行切换；
    在所述UE判断用于触发成功切换报告的触发条件中的至少一个条件满足的情况下，所述UE在所述成功切换报告中保存该次成功切换的信息；
    若该切换过程所对应的切换命令是通过辅小区组SCG链路成功接收的或者所述UE被配置了双连接DC，则在所述成功切换报告中包含第一信息，其中，所述第一信息用于指示所述切换命令成功接收时所述SCG链路的状态。
  2. 根据权利要求1所述的切换信息报告方法，其中，
    所述所述成功切换报告中还包含第二信息，所述第二信息用于指示所述切换命令成功接收时SCG小区的最新的测量结果。
  3. 根据权利要求1或者2所述的切换信息报告方法，其中，
    若该切换过程所对应的切换命令是通过SCG链路成功接收的，则在所述成功切换报告中包含第三信息，所述第三信息用于指示所述切换命令是通过SCG链路成功接收的。
  4. 根据权利要求1或者2所述的切换信息报告方法，其中，
    所述触发条件包含：T310超过配置的门限值、T312超过配置的门限值、T304超过配置的门限值、切换过程所使用的随机接入资源不是切换命令中所配置的专用随机接入资源、所述UE被配置了DC、该切换过程所对应的切换命令是通过SCG链路成功接收的。
  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SCG状态表示所述SCG对应的T310是否正在运行、所述SCG对应的T310的运行的值、所述SCG对应的T310是否超时、所述SCG是否处于SCG失败状态或挂起状态。
  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UE在从网络侧接收到包含成功切换报告请求指示的UEInformationRequest消息时，将所保存的成功切换报告中的内容包含在UEInformationResponse消息中，并向网络侧进行发送。
  7. 一种切换信息报告方法，包括：
    用户设备UE接收来自网络侧的切换命令，并基于所述切换命令执行切换；
    在所述UE判断用于触发成功切换报告的触发条件中的至少一个条件满足的情况下，所述UE在所述成功切换报告中保存该次成功切换的信息；
    若该切换过程所对应的切换命令是作为主小区组MCG失败信息的响应，则在所述成功切换报告中包含第四信息，所述第四信息用于指示所述切换命令成功接收时MCG处于无线链路失败RLF状态。
  8. 根据权利要求7所述的切换信息报告方法，其中，
    在所述成功切换报告中还包含第五信息，所述第五信息用于指示所述切换命令成功接收时T316的运行值。
  9. 根据权利要求7或者8所述的切换信息报告方法，其中，
    在接收到切换命令时的T316的运行值超过了所述T316的门限值时，在所述成功切换报告中还包含第六信息，所述第六信息用于指示所述切换命令成功接收时T316的运行值超过了所述T316门限值。
  10. 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权利要求1～9的任意一项所述的切换信息报告方法。
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