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CN-122003920-A - Device and method for processing conditional handover failure

CN122003920ACN 122003920 ACN122003920 ACN 122003920ACN-122003920-A

Abstract

A method of managing conditional reconfiguration performed by a User Equipment (UE) includes performing removal or maintenance of conditional reconfiguration by a higher layer of the UE upon completion of a mobility related procedure. The completion of the mobility-related procedure may include one or more of receiving an indication from the lower layer of the UE that the performance of the lower Layer Triggered Mobility (LTM) cell handover has been successfully completed, successfully completing the RACH procedure towards the target cell during the performance of the LTM cell handover, receiving an indication from the lower layer of the UE that the RACH procedure towards the target cell has been successfully completed during the performance of the LTM cell handover, performing the LTM procedure, performing CPA, CPC, SCPAC or CHO, or completing one or more of the CPA, CPC, LTM, SCPAC or CHO procedures.

Inventors

  • YOU XIN

Assignees

  • OPPO广东移动通信有限公司

Dates

Publication Date
20260508
Application Date
20241113
Priority Date
20231117

Claims (20)

  1. 1. A method of managing conditional reconfiguration performed by a user equipment, UE, comprising: the removal or maintenance of the conditional reconfiguration is performed by the higher layer of the UE upon completion of the mobility-related procedure.
  2. 2. The method of claim 1, wherein completing the mobility-related procedure comprises one or more of: Receiving, from a lower layer of the UE, an indication that execution of a lower layer triggered mobility LTM cell handover has been successfully completed; Successfully completing a random access channel, RACH, procedure towards a target cell during performance of the LTM cell handover; During execution of the LTM cell switch, receiving an indication from a lower layer of the UE that a RACH procedure towards a target cell has been successfully completed; Performing an LTM process; Performing conditional Primary and Secondary cells PSCell addition or Change CPA/CPC, subsequent conditional PSCell addition or Change SCPAC, or conditional Handover CHO, or One or more of the CPA, CPC, LTM, SCPAC or CHO processes are completed.
  3. 3. The method of claim 1 or 2, wherein performing, by the RRC layer of the UE, removal or maintenance of the conditional reconfiguration comprises one or more of: removing a CPA/CPC configuration from a UE variable if a CPA/CPC configuration is added or changed by a conditional primary and secondary cell PSCell within the UE variable; removing the SCPAC configuration from the UE variable if there is a subsequent conditional PSCell addition or change SCPAC configuration within the UE variable; Removing the LTM configuration from the UE variable if there is an underlying triggered mobility LTM configuration within the UE variable; Maintaining the SCPAC configuration within the UE variable if the SCPAC configuration is within the UE variable; maintaining the LTM configuration within the UE variable if the LTM configuration is within the UE variable; Removing SCPAC related cell set information in the UE variable if the related cell set information is SCPAC in the UE variable; Removing LTM related cell set information in the UE variable under the condition that the LTM related cell set information exists in the UE variable; maintaining the SCPAC related cell set information in the UE variable if the SCPAC related cell set information is in the UE variable; maintaining the LTM related cell set information in the UE variable if the LTM related cell set information is in the UE variable, or The CHO configuration within the UE variable is maintained or released in case of conditional switching of the CHO configuration within the UE variable.
  4. 4. The method of claim 3, wherein the SCPAC related set of cells information comprises a secure set of cells identifier, ID.
  5. 5. The method of claim 3, wherein the LTM-related cell set information includes a distributed unit DU information ID for resetting a layer 2 L2 protocol stack and a UE-based TA information ID for determining whether to perform the UE-based timing advance TA.
  6. 6. The method of claim 2, further comprising triggering, by the UE, the LTM cell switch on a primary cell group, MCG, or a secondary cell group, SCG.
  7. 7. The method of claim 2, further comprising determining, by the lower layer of the UE, that execution of the LTM cell handover will complete successfully, and sending the indication to the upper layer of the UE that execution of the LTM cell handover has completed successfully: Receiving an uplink, UL, grant for the new transmission on the same hybrid automatic repeat request, HARQ, process used for the initial UL transmission to the target cell; receiving a downlink DL assignment after the initial UL transmission to the target cell, or The RACH procedure towards the target cell is successfully completed.
  8. 8. The method of claim 2, further comprising indicating, by the lower layer of the UE to an upper layer of the UE, that execution of the LTM cell handover has been successfully completed or that the RACH procedure towards the target cell has been successfully completed during execution of the LTM cell handover.
  9. 9. The method of claim 1, wherein the conditional reconfiguration includes one or more of conditional primary and secondary cell PSCell addition CPA, conditional PSCell change CPC, subsequent conditional PSCell addition or change SCPAC, or conditional handover CHO with the CHO or secondary cell group SCG with candidate SCG.
  10. 10. A user equipment, UE, comprising: a higher layer configured to perform removal or maintenance of a conditional reconfiguration upon completion of a mobility-related procedure.
  11. 11. A user equipment, UE, comprising: A memory; Transceiver, and A processor coupled to the memory and the transceiver; Wherein the higher layer of the UE is configured to perform removal or maintenance of the conditional reconfiguration upon completion of the mobility-related procedure.
  12. 12. The UE of claim 11, wherein the completion of the mobility-related procedure comprises one or more of: Receiving, from a lower layer of the UE, an indication that execution of a lower layer triggered mobility LTM cell handover has been successfully completed; Successfully completing a random access channel, RACH, procedure towards a target cell during performance of the LTM cell handover; receiving an indication from a lower layer of the UE that a RACH procedure towards a target cell has been successfully completed during performance of the LTM cell handover; Performing an LTM process; Performing conditional Primary and Secondary cells PSCell addition or Change CPA/CPC, subsequent conditional PSCell addition or Change SCPAC, or conditional Handover CHO, or One or more of the CPA, CPC, LTM, SCPAC or CHO processes are completed.
  13. 13. The UE of claim 11 or 12, wherein performing, by an RRC layer of the UE, removal or maintenance of the conditional reconfiguration comprises one or more of: removing a CPA/CPC configuration from a UE variable if a CPA/CPC configuration is added or changed by a conditional primary and secondary cell PSCell within the UE variable; removing the SCPAC configuration from the UE variable if there is a subsequent conditional PSCell addition or change SCPAC configuration within the UE variable; Removing the LTM configuration from the UE variable if there is an underlying triggered mobility LTM configuration within the UE variable; Maintaining the SCPAC configuration within the UE variable if the SCPAC configuration is within the UE variable; maintaining the LTM configuration within the UE variable if the LTM configuration is within the UE variable; Removing SCPAC related cell set information in the UE variable if the related cell set information is SCPAC in the UE variable; Removing LTM related cell set information in the UE variable under the condition that the LTM related cell set information exists in the UE variable; maintaining the SCPAC related cell set information in the UE variable if the SCPAC related cell set information is in the UE variable; maintaining the LTM related cell set information in the UE variable if the LTM related cell set information is in the UE variable, or The CHO configuration within the UE variable is maintained or released in case of conditional switching of the CHO configuration within the UE variable.
  14. 14. The UE of claim 13, wherein the SCPAC-related set of cells information includes a secure set of cells identifier, ID.
  15. 15. The UE of claim 13, wherein the LTM-related cell set information includes a distributed unit DU information ID for resetting a layer 2 L2 protocol stack and a UE-based TA information ID for determining whether to perform the UE-based timing advance TA.
  16. 16. The UE of claim 12, wherein the UE is configured to trigger the LTM cell handover on a primary cell group, MCG, or a secondary cell group, SCG.
  17. 17. The UE of claim 12, wherein the lower layer of the UE is configured to determine that execution of the LTM cell switch will complete successfully, and to send the indication to the upper layer of the UE that execution of the LTM cell switch has completed successfully, if one or more of: Receiving an uplink, UL, grant for the new transmission on the same hybrid automatic repeat request, HARQ, process used for the initial UL transmission to the target cell; receiving a downlink DL assignment after the initial UL transmission to the target cell, or The RACH procedure towards the target cell is successfully completed.
  18. 18. The UE of claim 12, wherein the lower layer of the UE is configured to indicate to an upper layer of the UE that execution of the LTM cell handover has been successfully completed or that the RACH procedure towards the target cell has been successfully completed during execution of the LTM cell handover.
  19. 19. The UE of claim 11, wherein the conditional reconfiguration includes one or more of conditional primary and secondary cell PSCell addition CPA, conditional PSCell change CPC, subsequent conditional PSCell addition or change SCPAC, or conditional handover CHO with the CHO or secondary cell group SCG with candidate SCG.
  20. 20. A non-transitory machine-readable storage medium storing instructions which, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 9.

Description

Device and method for processing conditional handover failure Technical Field The present disclosure relates to the field of communication systems, and more particularly, to an apparatus and method of managing conditional reconfiguration. Background In a wireless communication system, when a User Equipment (UE) completes an access procedure toward a target cell, a conditional configuration for cell addition and change is conventionally released. Recent developments such as lower-LAYER TRIGGERED Mobility (LTM) and subsequent conditional primary and secondary cell (primary secondary cell, PSCell) additions or changes (subsequent conditional primary secondary cell addition or change, SCPAC) enable dynamic cell adjustment based on lower-layer measurements and allow for condition reconfiguration without requiring complete re-initialization. However, the process of triggering release or maintaining these conditional configurations after LTM completion is still undefined. Accordingly, there is a need for an apparatus and method of managing conditional reconfiguration. Disclosure of Invention It is an object of the present disclosure to propose an apparatus and method of managing condition reconfiguration that may solve the above and other problems in the prior art and/or perform appropriate actions on the removal or maintenance of condition reconfiguration when mobility-related procedures are completed. In a first aspect of the present disclosure, a method of managing conditional reconfiguration performed by a User Equipment (UE) includes performing removal or maintenance of conditional reconfiguration by a higher layer of the UE upon completion of a mobility-related procedure. In a second aspect of the disclosure, a User Equipment (UE) includes a higher layer configured to perform removal or maintenance of a conditional reconfiguration upon completion of a mobility-related procedure. In a third aspect of the disclosure, a User Equipment (UE) includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The UE is configured to perform the above method. In a fourth aspect of the disclosure, a non-transitory machine-readable storage medium has instructions stored thereon, which when executed by a computer, cause the computer to perform the above-described method. In a fifth aspect of the present disclosure, a chip includes a processor for invoking and running a computer program stored in a memory to cause a device on which the chip is mounted to perform the above-described method. In a sixth aspect of the present disclosure, a computer-readable storage medium has a computer program stored therein, causing a computer to execute the above-described method. In a seventh aspect of the present disclosure, a computer program product comprises a computer program that causes a computer to perform the above method. In an eighth aspect of the present disclosure, a computer program causes a computer to perform the above method. Drawings In order to more clearly illustrate the embodiments of the present disclosure or related techniques, the following drawings, which will be described in the embodiments, will be briefly introduced. It is apparent that the drawings are merely some embodiments of the present disclosure, and that one of ordinary skill in the art may obtain other drawings from these drawings without being limited thereto. Fig. 1 is a block diagram of one or more User Equipments (UEs) and a communication base station in a communication network system according to an embodiment of the disclosure. Fig. 2 is a schematic diagram illustrating a user plane protocol stack according to an embodiment of the present disclosure. Fig. 3 is a schematic diagram illustrating a control plane protocol stack according to an embodiment of the present disclosure. Fig. 4 is a block diagram of a UE according to an embodiment of the present disclosure. Fig. 5 is a block diagram of a UE according to an embodiment of the present disclosure. Fig. 6 is a flowchart illustrating a method of managing a condition reconfiguration performed by a UE according to an embodiment of the present disclosure. Fig. 7 is a block diagram of an example of a computing device according to an embodiment of the disclosure. Fig. 8 is a block diagram of a communication system according to an embodiment of the present disclosure. Detailed Description The technical gist, structural features, achieved objects, and effects of the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. In particular, the terminology used in the embodiments of the disclosure is for the purpose of describing a particular embodiment only and is not intended to be limiting of the disclosure. The technical solutions of the embodiments of the present disclosure may be applied to various communication systems, such as a global system for mobile communications (global system of mobile communication, GSM) syste