Information reporting method and user equipment

Abstract

The invention provides an information reporting method and corresponding user equipment. The information reporting method comprises the following steps: after user equipment UE in dual connection successfully completes a primary and secondary cell PSCell change process, executing a determination process of successfully adding a change report SPR to a PSCell; the UE determines to store the information of the successful PSCell change in a UE variable used for storing SPR (Surface Plasmon Response); the UE determines whether to perform an SPR determination procedure based on an SPR configuration of a primary cell PCell configuration or an SPR configuration of a PSCell configuration based on whether the PSCell change procedure is a first hop execution or a next hop execution of a subsequent condition PSCell add change SCPAC.

Description

Technical Field

[0001] This disclosure relates to the field of wireless communication technology, and more specifically, to a method for reporting information related to primary and secondary cells in a dual-connectivity scenario, and corresponding user equipment. Background Technology

[0002] At the 3rd Generation Partnership Project (3GPP) RAN#102 plenary meeting, a new research project for the Release 19 technical standard was approved (see non-patent literature: RP-234038: New WID data collection for SON (Self-Organizing Networks) / MDT (Minimization of Drive Tests) in NR standalone and MR-DC Phase 4). The research objective of this project is to further enhance the network data collection process for the new mobility features introduced in the Release 18 NR system, in order to better achieve self-organizing and self-optimizing networks and minimize drive tests. Specific technologies researched include implementing mobility robustness optimization based on Layer 1 or Layer 2 Triggered Mobility (LTM) and mobility robustness optimization based on Subsequent Conditional PSCell Addition or Change (SCPAC) technology.

[0003] This disclosure primarily addresses the problem of how to implement SCPAC-based information reporting in the NR system, proposing solutions to this issue. Summary of the Invention

[0004] The purpose of this disclosure is to provide a solution to the problem of information reporting based on SCPAC technology in NR systems. More specifically, this disclosure addresses the problem of recording PSCell change information after a successful execution of a PSCell change process based on SCPAC configuration in an NR system. This disclosure provides an information reporting method executed in a user equipment and a corresponding user equipment.

[0005] According to a first aspect of this disclosure, an information reporting method is proposed, comprising: after a user equipment (UE) in dual connectivity successfully completes a primary / secondary cell PSCell change process, executing a determination process for a successful PSCell Add Change Report (SPR); the UE determines to store information about the successful PSCell change in a UE variable used to store the SPR; the UE determines whether the SPR determination process is based on the primary cell PCell configuration or the source PSCell configuration based on whether the PSCell change process is a first-hop or next-hop execution of a subsequent conditional PSCell Add Change SCPAC initiated by the primary site MN: if the executed PSCell change process is a first-hop SCPAC execution of an SCPAC initiated by the MN, the UE executes the SPR determination process based on the SPR configuration configured in the PCell; if the executed PSCell change process is a next-hop SCPAC execution of an SCPAC, the UE executes the SPR determination process based on the SPR configuration configured in the source PSCell.

[0006] In the information reporting method of the first aspect mentioned above, the UE determines whether the SPR determination process is based on the SPR configuration configured in the primary cell PCell or the SPR configuration configured in the source PSCell based on whether the PSCell change process is initiated by the primary site MN as the first hop execution or the next hop execution of the subsequent condition PSCell add change SCPAC. This includes: if the measurement identifier of the execution condition associated with the executed SCPAC process is a measurement identifier associated with the measurement configuration of the primary cell group MCG, the UE performs the SPR determination process based on the SPR configuration configured in the PCell; if the measurement identifier of the execution condition associated with the executed SCPAC process is a measurement identifier associated with the measurement configuration of the secondary cell group SCG, the UE performs the SPR determination process based on the SPR configuration configured in the source PSCell.

[0007] In the information reporting method of the first aspect mentioned above, the UE determines whether the SPR determination process is based on the SPR configuration configured in the primary cell PCell or the SPR configuration configured in the source PSCell based on whether the PSCell change process is initiated by the primary site MN as the first hop execution or the next hop execution of the subsequent condition PSCell addition change SCPAC. This includes: if the measurement event corresponding to the measurement identifier of the execution condition associated with the executed SCPAC process is A4, the UE performs the SPR determination process based on the SPR configuration configured in the PCell; if the measurement event corresponding to the measurement identifier of the execution condition associated with the executed SCPAC process is A3 or A5, the UE performs the SPR determination process based on the SPR configuration configured in the source PSCell.

[0008] In the information reporting method of the first aspect mentioned above, the UE determines whether the SPR determination process is based on the SPR configuration configured in the primary cell PCell or the SPR configuration configured in the source PSCell based on whether the PSCell change process is initiated by the primary site MN and the subsequent condition PSCell adds a change SCPAC. This includes: if the execution condition associated with the executed SCPAC process is configured by the MN, the UE performs the SPR determination process based on the SPR configuration configured in the PCell; if the execution condition associated with the executed SCPAC process is configured by the SN, the UE performs the SPR determination process based on the SPR configuration configured in the source PSCell.

[0009] In the information reporting method of the first aspect mentioned above, the UE determines whether the SPR determination process is based on the SPR configuration configured in the primary cell PCell or the SPR configuration configured in the source PSCell based on whether the PSCell change process is initiated by the primary site MN and the subsequent condition PSCell adds a change SCPAC. This includes: if the execution condition associated with the executed SCPAC process is obtained directly by the UE from the condExecutionCond information element in the received Radio Resource Control (RRC) message, the UE executes the SPR determination process based on the SPR configuration configured in the PCell; if the execution condition associated with the executed SCPAC process is obtained directly by the UE from the condExecutionCond information element in the received Radio Resource Control (RRC) message, the UE executes the SPR determination process based on the SPR configuration configured in the PCell; if the execution condition associated with the executed SCPAC process is obtained from the primary site MN and the source PSCell, the UE executes the SPR determination process based on the SPR configuration configured in the PCell.

[0010] The SPR determination process is obtained from the subsequentCondExecutionCondSCG information element, and the UE performs the SPR determination process based on the SPR configuration configured in the source PSCell.

[0011] In the information reporting method of the first aspect mentioned above, the UE determines whether the SPR determination process is based on the SPR configuration configured in the primary cell PCell or the SPR configuration configured in the source PSCell based on whether the PSCell change process is the first-hop execution or the next-hop execution of the subsequent conditional PSCell addition change SCPAC initiated by the primary site MN. This includes: when the SCPAC process executed by the UE is a next-hop SCPAC execution, the UE considers that the sn-InitiatedPSCellChange information element is configured in the SCPAC configuration item, and the UE performs the SPR determination process based on the SPR configuration configured in the source PSCell.

[0012] In the information reporting method of the first aspect mentioned above, the UE determines whether the SPR determination process is based on the primary cell PCell configuration or the PSCell configuration based on the first hop execution or the next hop execution of the subsequent conditional PSCell addition of the changed SCPAC initiated by the primary site MN. This includes: if the mn-InitiatedSCPAC information element is included in the conditional reconfiguration corresponding to the executed SCPAC process, the UE considers that the SCPAC configuration has not been configured.

[0013] sn-InitiatedPSCellChange ignores the sn-InitiatedPSCellChange instruction contained in the conditional reconfiguration corresponding to the SCPAC procedure, and performs the SPR determination process based on the SPR configuration configured in the PCell.

[0014] In the information reporting method of the first aspect mentioned above, the mn-InitiatedSCPAC information element is used to indicate that the received SCPAC configuration is an MN-initiated SCPAC configuration process.

[0015] The sn-InitiatedPSCellChange information element is used to indicate that the PSCell change process corresponding to the SPR was initiated by the SN.

[0016] According to a second aspect of this disclosure, an information reporting method is proposed, comprising: a user equipment (UE) performing an operation when receiving a Radio Resource Control (RRC) reconfiguration message; if the executed RRC reconfiguration message contains a synchronization reconfiguration for a secondary cell group (SCG), and the RRC reconfiguration is applied not because of the subsequent execution of a Primary / Secondary Cell Addition Change (SCPAC), and the UE is configured with a successful Primary / Secondary Cell Addition Change Report (SPR) configuration, then after successfully completing the Primary / Secondary Cell PSCell change process, an SPR determination operation is performed.

[0017] According to a third aspect of this disclosure, a user equipment (UE) is provided, comprising: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, perform an information reporting method according to a context. Attached Figure Description

[0018] To gain a more complete understanding of this disclosure and its advantages, reference will now be made to the following description taken in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic flowchart illustrating the information reporting method in Embodiment 1 of this disclosure.

[0020] Figure 2 This is a schematic flowchart illustrating the information reporting method in Embodiment 2 of this disclosure.

[0021] Figure 3 This is a schematic flowchart illustrating the information reporting method in Embodiment 6 of this disclosure.

[0022] Figure 4 This is a schematic flowchart illustrating the information reporting method in Embodiment 8 of this disclosure.

[0023] Figure 5 This is a block diagram representing the user equipment (UE) involved in this disclosure.

[0024] In the accompanying drawings, identical or similar structures are identified by the same or similar reference numerals. Detailed Implementation

[0025] Other aspects, advantages, and key features of this disclosure will become apparent to those skilled in the art from the following detailed description of exemplary embodiments of the disclosure taken in conjunction with the accompanying drawings.

[0026] In this disclosure, the terms “comprising” and “containing” and their derivatives are used to mean including rather than limiting; the term “or” is inclusive and means and / or.

[0027] In this specification, the various embodiments described below to illustrate the principles of this disclosure are merely illustrative and should not be construed as limiting the scope of the disclosure in any way. The following description, with reference to the accompanying drawings, is intended to aid in a comprehensive understanding of exemplary embodiments of this disclosure as defined by the claims and their equivalents. The following description includes various specific details to aid understanding, but these details should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Furthermore, for clarity and brevity, descriptions of well-known functions and structures have been omitted. Additionally, throughout the drawings, the same reference numerals are used for similar functions and operations.

[0028] The following describes several implementation methods using the NR mobile communication system and its subsequent evolutions as an example application environment. It should be noted that this disclosure is not limited to the following implementation methods, but is applicable to many other wireless communication systems. Unless otherwise specified, the concepts of cell, base station, and cell group are interchangeable in this disclosure. This disclosure involves the addition or modification of primary and secondary cell PSCells. Primary and secondary cell PSCells, secondary base station SNs, secondary cell groups (SCGs), secondary beams, and secondary transmission points (TRPs) are interchangeable. In this disclosure, the PSCell add / modify command is used to trigger the UE to perform PSCell add or modify. In the NR system, the PSCell add / modify command is an RRC reconfiguration message containing Reconfigurationwithsync information elements for the SCG. Therefore, PSCell add / modify and SCG reconfiguration or PSCell reconfiguration are equivalent. The synchronization reconfiguration information element may include configuration information of the target primary and secondary cells, such as the target cell identifier, target cell frequency, common configurations of the target cell (e.g., system information), random access configuration used by the UE to access the target cell, security parameter configuration of the UE in the target cell, and radio bearer configuration of the UE in the target cell. Cancel, release, delete, clear, and clear are replaceable. Execute, use, and apply are replaceable. Configuration and reconfiguration are replaceable. Monitor and detect are replaceable. Trigger and initiate are replaceable. The names of information elements appearing in this embodiment are not limited by capitalization. The information elements in the RRC messages involved in the embodiments of this disclosure can refer to the corresponding information elements in 3GPP document 38.331-i10.

[0029] The following describes processes or concepts in the prior art to which this disclosure relates.

[0030] Dual Connectivity:

[0031] To improve UE data transmission efficiency, the UE establishes links with two base stations simultaneously, meaning the radio resources used by the UE are provided by different schedulers located at the two base stations. The radio access between these two base stations and the UE can be the same or different standards (Radio Access Technology, RAT), such as both being NR, or one being NR and the other LTE, also known as Evolved Universal Terrestrial Radio Access (E-UTRA). Of these two base stations, one is called the Master Node (MN) or MgNB / MeNB, and the serving cell group under the Master Node is called the Master Cell Group (MCG); the other is called the Secondary Node (SN) or SgNB / SeNB, and the serving cell group under the Secondary Node is called the Secondary Cell Group (SCG). When the Master Node is LTE and the Secondary Node is NR, the DC is called EN-DC (using the 4G core network) or NGEN-DC (using the 5G core network); when both the Master Node and the Secondary Node are NR, the DC is called NR-DC. The MCG (Multi-Cell Group) comprises one primary cell (PCell) and one or more optional secondary cells (SCells). The PCell operates on the primary frequency, through which the UE performs the initial connection establishment or connection re-establishment procedure. The SCG comprises one primary SCG cell (PSCell) and one or more optional SCells. A PSCell refers to the SCG cell where the UE performs random access during SCG synchronization reconfiguration or the cell identifier indicated in the SCG synchronization reconfiguration information element. PCells and PSCells are also collectively referred to as special cells (SpCells). When the DC (Distributed Control Center) is configured, the UE's Data Radio Bearer (DRB) and Signalling Radio Bearer (SRB) can be configured as split bearers. When not configured as splitSRBs, SRB1 and SRB2 are transmitted via the MCG path. Furthermore, when the DC is configured, SRB3 can also be established for the SN (Signal Node), used to transmit configuration information between the SN and the UE associated with the SCG. The creation and release of SRB3 are determined by SN.

[0032] PSCell change process in NR system:

[0033] The addition of a PSCell is always initiated by the MN. Changes to a PSCell can be initiated by either the MN or the SN. The MN or SN can initiate PSCell changes based on factors such as measurement results of the source PSCell or neighboring cells reported by the UE, or the load of neighboring cells. During a PSCell addition / change process involving the MN (whether initiated by the MN or the SN), the cell addition / change command for the PSCell is included in the RRC reconfiguration message of SRB1 and sent to the UE. The PSCell addition / change command (i.e., the RRC reconfiguration message generated by the target PSCell) is an RRC reconfiguration message for the SCG. When sent to the UE via the MCG link or via the SCG link portion of signaling split bearer 1 or 2, it is generally included in the mrdc-SecondaryCellGroupConfig information element or the nr-SecondaryCellGroupConfig information element and nested within the RRC reconfiguration message of SRB1. If the change of PSCell does not require the participation of MN, such as the PSCell change scenario of intra-SN, the SN can independently generate an RRC reconfiguration message containing the PSCell change command and send it to the UE through SRB3 of the SCG link.

[0034] When a UE receives a PSCell add / change command and triggers the addition or change of the target PSCell, it applies the configuration in the command to perform the PSCell addition or change, such as including the execution of a random access procedure to the target PSCell. The UE uses a timer T304 to detect the cell change process. When the cell change process is initiated, the UE starts the T304 timer; when the cell change process is completed (e.g., the random access procedure is successfully completed), the UE stops the timer T304; when T304 times out, the UE considers the PSCell change to have failed or the synchronization reconfiguration to have failed.

[0035] Conditional reconfiguration

[0036] Conditional reconfiguration can be applied to either the MCG or SCG. Conditional reconfiguration of the MCG / PCell is called Conditional Handover (CHO); conditional reconfiguration of the SCG / PSCell is called Conditional PSCell Change (CPC) or Conditional PSCell Addition / Change (CPAC). In the NR system, conditional reconfiguration is configured to the UE via the ConditionalReconfiguration information element in the RRC message. The ConditionalReconfiguration information element contains a list of candidate cells for conditional reconfiguration (the condReconfigToAddModList information element for adding or modifying candidate cells, or the condReconfigToRemoveList information element for removing candidate cells). The UE stores the configuration corresponding to one or more of these candidate cells in the UE conditional reconfiguration variable VarConditionalReconfig. In NR system version 17, the UE maintains two VarConditionalReconfig variables, used to store CHO or CPAC configurations received on the MCG link and CPC configurations received on the SCG link, respectively. A conditional reconfiguration variable stores a conditional reconfiguration list (conReconfigIist (i.e., CondReconfigToAddModList)). Each conditional reconfiguration item (CondReconfigToAddMod) is identified by a conditional reconfiguration identifier (condReconfigId), which includes the execution condition (condExecutionCond or condExecutionCondSCG) and the candidate cell's RRC configuration (condRRCReconfig). The candidate cell's RRC configuration contains a nested RRC reconfiguration message, where the cell identifier in the serving cell common configuration (servingCellConfigCommon information element) within the synchronization reconfiguration (reconfigurationWithSync information element) corresponds to a conditional reconfiguration candidate cell. If the synchronization reconfiguration is for an SCG, i.e. included in an SCG configuration (such as a secondaryCellGroup or nr-SCG information element), then the conditional reconfiguration item is a CPAC configuration; if the synchronization reconfiguration is for an MCG, i.e. included in an MCG configuration (such as a masterCellGroup information element), then the conditional reconfiguration item is a CHO configuration.The UE performs conditional reconfiguration evaluation on each candidate cell based on the execution conditions. The execution conditions may include one or two measurement identifiers (measIDs). Only when all the measurement events corresponding to the measurement identifiers included in the execution conditions (such as condEventA3, CondEventA5, or CondEventA4 contained in the CondTriggerConfig information element) are satisfied, the UE considers the corresponding candidate cell as the triggering cell and initiates the conditional reconfiguration execution process. During the conditional reconfiguration execution process, the UE applies the saved RRC configuration (condRRCReconfig) corresponding to the selected triggering cell and performs cell change operations, such as starting timer T304, downlink synchronization to the selected cell, initiating a random access procedure to the selected cell for uplink synchronization, and sending an RRC reconfiguration completion message to the selected cell (see section 5.3.5.3 of the 3GPP protocol specification document TS38.331 for details, which will not be elaborated here). In this disclosure, unless otherwise specified, CHO and CHO configuration can be replaced, CPAC and CPAC configuration can be replaced, and conditional reconfiguration can refer to either CHO configuration or CPAC configuration. Conditional reconfiguration can also refer to an RRC message containing conditional reconfiguration, such as an RRC reconfiguration message.

[0037] Subsequent CPAC:

[0038] In the NR system version 18, to further reduce the signaling overhead and latency caused by configuring CAPC, a subsequent CPAC (SCPAC) was introduced on top of the traditional CPAC. SCPAC allows for the configuration of multiple hops of CPAC for the UE. A CPAC configuration item (CondReconfigToAddMod) contains the execution condition configuration for the next-hop SCPAC (subsequentCondReconfig information element). The subsequentCondReconfig information element contains a list of execution conditions (CondExecutionCondToAddModList information element). Each item in this list, CondExecutionCondToAddMod, contains a condition reconfiguration identifier CondReconfigId and the corresponding execution condition (subsequentCondExecutionCond or subsequentCondExecutionCondSCG information element). When a UE's PSCell successfully changes to a CPAC candidate cell A, if the CPAC configuration A corresponding to that cell contains the next-hop execution condition configuration, and the condition reconfiguration identifier in the next-hop execution condition configuration is the same as or matches the condition reconfiguration identifier in other CPAC configurations B, then for the CPAC configuration B corresponding to that condition reconfiguration identifier, the UE will replace the execution condition configuration stored in CPAC configuration B with the execution condition configuration corresponding to the next-hop execution condition configuration. In other words, the execution condition configuration in the stored CPAC configuration B will be updated to the execution condition configuration in CPAC configuration A that matches the condition reconfiguration identifier.

[0039] SCPAC can be initiated by either the MN or the SN. In an MN-initiated SCPAC, the MN initially triggers the candidate cell preparation procedure and generates the execution conditions for the first-hop SCPAC (or the initial SCPAC execution). In an SN-initiated SCPAC, the SN initially triggers the candidate cell preparation procedure and generates the execution conditions for the first-hop SCPAC. In both SN-initiated and MN-initiated SCPACs, the execution conditions for subsequent executions of the SCPAC (i.e., the execution conditions for the next-hop SCPAC) are generated by the candidate SN. Whether SCPAC is initiated by the MN or the SN is from the network side's perspective; from the UE's perspective, it is impossible to know whether the SCPAC configuration it acquires was initiated by the MN or the SN.

[0040] Wireless link failure reporting:

[0041] In NR systems, the UE generates and saves a Radio Link Failure (RLF) report when a Radio Link Failure (RLF) or Handover Failure (HOF) occurs, storing the RLF failure information in the UE variable VarRLF-Report. Generally, the UE only saves the RLF report for the most recent connection failure (RLF or HOF). That is, when a connection failure occurs, the UE clears the previously saved RLF report and then saves the failure information corresponding to the most recent connection failure in the VarRLF-Report variable. After restoring the connection with the network (e.g., through an RRC re-establishment procedure or an RRC establishment procedure for establishing a new connection), the UE can inform the network via an RRC message that it has available Radio Link Failure reports (e.g., indicated by the rlf-InfoAvailable information element). Upon receiving this indication, the network can request the UE to report its saved Radio Link Failure reports via an RRC message (e.g., indicated by the rlf-ReportReq information element in the UE InformationRequest message). The UE will report the saved radio link failure report (the rlf-Report information element in the UE Information Response message) to the network side in the RRC response message. The radio link failure report obtained by the network side is used for network optimization, such as network coverage and mobility robustness optimization. The radio link failure report contains information related to the link failure, including the measurement results of the source cell, target cell or neighboring cell when the link failure occurred, location information, the identifier of the primary cell where the link failure occurred, the link failure type (RLF or HOF), the reason for the RLF, the time elapsed from the connection failure to the RLF report reporting (denoted by the timeSinceFailure information element), the time elapsed from the last receipt of the handover command (handover initiation or handover execution) to the connection failure (denoted by the timeConnFailure information element), the time between the connection failure and the next time the UE enters the RRC connection state after the connection failure and the failure of the reconnection process (denoted by the timeUntilReconnection information element), and the RRC reconnection cell identifier, etc.

[0042] Successful PSCell addition or change report:

[0043] Version 18 of the NR system introduces a successful PScell ​​addition or change information report, namely the Successful PScell ​​addition & change Report (SPR), so that the UE can report relevant information about a successful PScell ​​addition or change to the network side. Based on the information obtained, the network side can further optimize the mobility of the PScell, reduce the failure rate of PScell ​​addition or change, and reduce the latency of PScell ​​addition or change.

[0044] The network side needs to configure SPR trigger condition parameters (such as percentage thresholds corresponding to T310, T312, and T304) to the UE. The UE will only record the relevant information of the successful PSCell addition or change when one or more of the configured trigger conditions are met. Specifically, trigger conditions related to the source PSCell link status, such as the T310 or T312 percentage threshold, are configured to the UE by the source PSCell or PCell, while trigger conditions related to the target cell link status, such as the T304 percentage threshold, are configured to the UE by the target PSCell. The PSCell change process can be initiated by the MN or the SN. In 3GPP version 18, when a UE in DC state receives an RRC message containing a PSCell change command (including non-CPAC and CPAC messages), the UE determines which site triggered the corresponding PSCell change process based on the SN trigger indication (sn-InitiatedPSCellChange information element) in the RRC message. If the RRC message or a CAPC configuration item contains a sn-InitiatedPSCellChange information element, which indicates that the PSCell change procedure was initiated by the SN, the UE considers the PSCell change procedure to be initiated by the SN. If the RRC message does not contain the sn-InitiatedPSCellChange information element, the UE considers the PSCell change procedure to be initiated by the MN. The UE can be configured with two sets of SPR configurations (successPSCell-Config information elements) simultaneously: one by the MN and one by the SN. When the UE successfully completes a PSCell change procedure or its triggered random access procedure, the UE performs an SPR determination process, that is, based on the saved SPR configuration, it determines whether to save the SPR information for the PSCell change procedure in the corresponding UE variable (VarSuccessPSCell-Report). During the SPR determination process, if the PSCell change process is triggered by the SN, the UE determines whether to save the SPR information for the PSCell change process in the corresponding UE variable based on the saved SPR configuration configured by the SN. If the PSCell change process is triggered by the MN, the UE determines whether to save the SPR information for the PSCell change process in the corresponding UE variable based on the saved SPR configuration configured by the MN. When the UE saves the PSCell change information of the PSCell change event in the SPR variable, the UE will also set one or more related contents in the PSCell change information based on whether the sn-InitiatedPSCellChange information element is included in the PSCell change command.The SPR information recorded by the UE may include one or more of the following: the source PSCell cell identifier of the PSCell change; the target PSCell cell identifier of the added or changed PSCell; the measurement results of the source or target PSCell; the measurement results of neighboring cells; the SPR triggering reason, etc. The UE can inform the network side that it has available SPRs by including an SPR indication in the RRC message. After receiving the indication, the network side can request the UE to report its saved SPRs via an RRC message (such as the UEInformationRequest message). The UE will report the saved SPRs to the network side in the UEInformationResponse message in response to the RRC message. This process is called the UE information process.

[0045] As mentioned earlier, the SPR in version 18 was designed for traditional PSCell change processes (i.e., unconditional reconfiguration) and general CPAC processes. In the NR system of version 19, whether or not to enhance the SPR based on the newly introduced SCPAC features, and how to enhance it, are issues to be discussed in the network self-optimization project of version 19, and this is also the main issue addressed in this disclosure. More specifically, in the MN-initiated SCPAC scenario, the MN generates an RRC message containing the SCPAC configuration. The SCPAC configuration includes both the execution conditions generated by the MN for the initial execution of the SCPAC (first hop) and the execution conditions generated by the candidate SN for subsequent execution of the SCPAC (next hop). Therefore, when the UE is configured with an MN-initiated SCPAC configuration, how the UE determines whether to perform the SPR determination process based on the MN-configured SPR or the SN-configured SPR when performing an SCPAC process is a problem that needs to be solved. Furthermore, if the method in version 18 is used to determine whether the SPR configuration is based on the MN configuration or the SN configuration by whether the sn-InitiatedPSCellChange indication is carried in the RRC message containing the PSCell change command, then how the network side sets the sn-InitiatedPSCellChange indication or how the UE side understands the network side's sn-InitiatedPSCellChange configuration becomes a problem that needs to be solved.

[0046] The following embodiments provide solutions to the aforementioned problems. Unless otherwise specified, some concepts or definitions are universal across the embodiments, and the various operations described in the embodiments are not limited in their execution order.

[0047] Example 1

[0048] This embodiment provides an information reporting method performed on a UE. Considering that SCPAC procedures may occur more frequently than traditional CPAC procedures, the method described in this embodiment allows the UE to avoid performing the SPR determination process for a successfully completed PSCell change procedure when it is an SCPAC procedure, thereby avoiding SPR storage and reporting issues caused by frequent SCPAC procedures.

[0049] The following is a detailed description of Embodiment 1 of this disclosure. Figure 1 This is a schematic flowchart illustrating the information reporting method in Embodiment 1 of this disclosure, as shown below. Figure 1 As shown, the information reporting method in Embodiment 1 of this disclosure may include the following steps.

[0050] Step 101: The UE performs the operation when it receives the RRC reconfiguration message.

[0051] Optionally, the UE may perform the operation initiated upon receiving the RRC reconfiguration message, or when conditional reconfiguration is executed. Optionally, the conditional reconfiguration is a CHO, CPAC, or SCPAC.

[0052] Step 102: The UE determines if the executed RRC reconfiguration message contains a synchronization reconfiguration for SCG, and the RRC reconfiguration is applied not because of the execution of SCPAC, and if the UE is configured with SPR, then when the random access procedure triggered by the synchronization reconfiguration for SCG is successfully completed, the UE executes the operation determined by SPR.

[0053] Optionally, the synchronization reconfiguration for SCG refers to the synchronization reconfiguration information element being included in the configuration of SCG (such as in the spCellConfig information element of SCG).

[0054] Optionally, the SPR configuration refers to the successPSCell-Config information element.

[0055] Optionally, before step 101, the UE may receive an RRC reconfiguration message from the network side or initiate a conditional reconfiguration execution process to apply the conditional reconfiguration corresponding to the selected cell.

[0056] Optionally, the conditional reconfiguration corresponding to the selected cell is the condRRCReconfig information element corresponding to that cell in the conditional reconfiguration variables stored by the UE.

[0057] Example 2

[0058] This embodiment provides an information reporting method performed on a UE. Using the method described in this embodiment, when the UE is configured with SCPAC configuration initiated by the MN, the UE can determine whether the SPR determination process is based on the SPR configuration configured by the MN or the SPR configuration configured by the SN during the execution of the SPR determination process.

[0059] The following is a detailed description of Embodiment 2 of this disclosure. Figure 2 This is a schematic flowchart illustrating the information reporting method in Embodiment 2 of this disclosure, as shown below. Figure 2 As shown, the information reporting method in Embodiment 2 of this disclosure may include the following steps.

[0060] Step 201: After the random access procedure triggered by the synchronization reconfiguration for SCG is successfully completed, the UE performs the operation determined by the SPR.

[0061] Optionally, before step 201, the UE may perform a PSCell change procedure, that is, apply the corresponding RRC reconfiguration message containing the synchronization reconfiguration for SCG.

[0062] Optionally, the UE initiates a random access procedure to the target PSCell when performing a PSCell change.

[0063] Step 202: During the SPR determination process performed by the UE, if the corresponding PSCell change event is the first hop SCPAC execution of the SCPAC initiated by the MN, then the UE performs the SPR determination process based on the SPR configuration configured in the PCell; if the corresponding PSCell change event is the next hop SCPAC execution of the SCPAC, then the UE performs the SPR determination process based on the SPR configuration configured in the source PSCell.

[0064] Optionally, the first SCPAC execution is also referred to as the initial SCPAC execution.

[0065] Optionally, the next-hop SCPAC execution is also referred to as following SCPAC execution.

[0066] Optionally, the next-hop SCPAC is the next-hop SCPAC of the SCPAC initiated by MN, referring to any SCPAC execution other than the initial SCPAC execution.

[0067] During the SCPAC process, the UE changes its serving PSCell to the selected target candidate PSCell and applies the conditional reconfiguration corresponding to the condReconfigId associated with that PSCell (such as the configuration contained in the condRRCReconfig information element or the configuration contained in the condReconfigToAddMod item).

[0068] Optionally, the SPR determination process based on the SPR configuration configured by PCell includes one or more of the following operations:

[0069] Operation 1: If the ratio between the running value of timer T310 and the configured value of timer T310 is greater than the T310 threshold value (e.g., identified by thresholdPercentageT310-SCG) in the SPR configuration configured by the PCell before the final SCG synchronization reconfiguration, the UE saves the SPR information in the SPR variable. Optionally, the configured value of timer T310 is configured by the UE when it connects to the source PSCell before the final SCG synchronization reconfiguration; or it is configured by the UE when it connects to the PCell before the final SCG synchronization reconfiguration. Optionally, this operation is performed if the SPR configuration configured by the PCell before the final SCG synchronization reconfiguration includes a T310 threshold value.

[0070] Operation 2: If the ratio between the running value of timer T312 and the configured value of timer T312 is greater than the T312 threshold value (e.g., identified by thresholdPercentageT312-SCG) in the SPR configuration configured by the PCell before performing the final SCG synchronization reconfiguration, the UE saves the SPR information in the SPR variable. Optionally, the configured value of timer T312 is configured by the UE when it connects to the source PSCell before performing the final SCG synchronization reconfiguration; or it is configured by the UE when it connects to the PCell before performing the final SCG synchronization reconfiguration. Optionally, this operation is performed if the SPR configuration configured by the PCell before the UE performs the final SCG synchronization reconfiguration includes a T312 threshold value.

[0071] Operation 3: The UE sets the measurement results in the SPR information based on the measurement configuration configured in the PCell. Optionally, the measurement configuration is a measObjectNR information element. Optionally, setting the measurement results in the SPR information includes including the neighbor cell measurement results in the measResultListNR in the measResultNeighCells information element.

[0072] Operation 4: The UE sets the location information in the SPR information according to the otherConfig information element set by the PCell. Optionally, the location information is included in the locationInfo information element.

[0073] Optionally, the SPR determination process based on the SPR configuration configured in PSCell includes one or more of the following operations:

[0074] Operation 5: If the ratio between the running value of timer T310 and the configured value of timer T310 is greater than the T310 threshold value (e.g., identified by thresholdPercentageT310-SCG) in the SPR configuration configured by the source PSCell before performing the final SCG synchronization reconfiguration, the UE saves the SPR information in the SPR variable. Optionally, the configured value of timer T310 is configured by the UE when it connects to the source PSCell before performing the final SCG synchronization reconfiguration. Optionally, this operation is performed if the SPR configuration configured by the PSCell before the UE performs the final SCG synchronization reconfiguration includes the T310 threshold value.

[0075] Operation 6: If the ratio between the running value of timer T312 and the configured value of timer T312 is greater than the T312 threshold value (e.g., identified by thresholdPercentageT312-SCG) in the SPR configuration configured by the PSCell before performing the final SCG synchronization reconfiguration, the UE saves the SPR information in the SPR variable. Optionally, the configured value of timer T312 is configured by the UE when the UE connects to the source PSCell before performing the final SCG synchronization reconfiguration. Optionally, this operation is performed if the SPR configuration configured by the PSCell before the UE performs the final SCG synchronization reconfiguration includes a T312 threshold value.

[0076] Operation 7: The UE sets the measurement results in the SPR information based on the measurement configuration configured in the PSCell. Optionally, the measurement configuration is a measObjectNR information element. Optionally, setting the measurement results in the SPR information includes including the neighbor cell measurement results in the measResultListNR in the measResultNeighCells information element.

[0077] Operation 8: The UE sets the location information in the SPR information according to the otherConfig information element set in the PSCell. Optionally, the location information is included in the locationInfo information element.

[0078] Operation 9: The UE saves SPR information in the SPR variable, including including sn-InitiatedPSCellChange in the SPR information. This indication information is used to indicate whether the PSCell change procedure corresponding to the SPR or the executed CPAC or SCPAC procedure is configured or initiated by the SN. Optionally, setting this indication information to true indicates that the PSCell change procedure or the executed CPAC or SCPAC procedure is configured or initiated by the SN.

[0079] In step 202, the UE determines whether the SPR configuration is based on the PCell or the PSCell based on whether the PSCell change event is the first-hop SCPAC execution or the next-hop SCPAC execution initiated by the MN. The UE then performs the SPR determination process based on whether the SPR configuration is based on the PCell or the PSCell. Some implementation methods for determining whether the PSCell change event is the first-hop SCPAC execution or the next-hop SCPAC execution initiated by the MN are given below, but this embodiment is not limited to these implementation methods.

[0080] In implementation method 1, if the measurement identifier (measId) of the execution condition associated with the executed SCPAC procedure is the measId in VarMeasConfig associated with the measurement configuration measConfig of the MCG, then the UE considers the executed SCPAC procedure to be the first-hop SCPAC initiated by the MN. If the measurement identifier (measId) of the execution condition associated with the executed SCPAC procedure is the measId in VarMeasConfig associated with the measurement configuration measConfig of the SCG, then the UE considers the executed SCPAC procedure to be the next-hop SCPAC or the executed SCPAC procedure not to be the first-hop SCPAC initiated by the MN.

[0081] Therefore, in implementation mode 1, step 202 can be executed as follows: during the UE's SPR determination process, if the measurement identifier of the execution condition associated with the executed SCPAC procedure is the measId in VarMeasConfig associated with the measurement configuration measConfig of the MCG, then the UE executes the SPR determination process based on the SPR configuration configured in the PCell; if the measurement identifier of the execution condition associated with the executed SCPAC procedure is the measId in VarMeasConfig associated with the measurement configuration measConfig of the SCG, then the UE executes the SPR determination process based on the SPR configuration configured in the source PSCell.

[0082] Optionally, the measurement identifier is one or more measurement identifiers in the execution conditions.

[0083] In implementation method 2, if the measurement event corresponding to the measurement identifier (measId) of the execution condition associated with the executed SCPAC procedure is A4 (i.e., CondEvent A4), then the UE considers the executed SCPAC procedure to be the first-hop SCPAC initiated by MN. If the measurement event corresponding to the measurement identifier (measId) of the execution condition associated with the executed SCPAC procedure is A3 or A5 (i.e., CondEvent A3 or CondEvent A5), then the UE considers the executed SCPAC procedure to be the next-hop SCPAC or the executed SCPAC procedure not to be the first-hop SCPAC initiated by MN.

[0084] Therefore, in implementation method 2, step 202 can be executed as follows: during the UE's SPR determination process, if the measurement event corresponding to the measurement identifier of the execution condition associated with the executed SCPAC procedure is A4, then the UE executes the SPR determination process based on the SPR configuration configured in the PCell; if the measurement event corresponding to the measurement identifier of the execution condition associated with the executed SCPAC procedure is A3 or A5, then the UE executes the SPR determination process based on the SPR configuration configured in the source PSCell.

[0085] In implementation method 3, if the execution condition associated with the executed SCPAC procedure is configured by MN, then the UE considers the executed SCPAC procedure to be the first-hop SCPAC initiated by MN. If the execution condition associated with the executed SCPAC procedure is configured by SN, then the UE considers the executed SCPAC procedure to be the next-hop SCPAC or the executed SCPAC procedure to be either not the first-hop SCPAC initiated by MN.

[0086] Optionally, the execution condition being configured with MN means that the measurement identifier corresponding to the execution condition is configured with MN; the execution condition being configured with SN means that the measurement identifier corresponding to the execution condition is configured with SN.

[0087] Therefore, in implementation mode 3, step 202 can be executed as follows: during the UE's SPR determination process, if the execution condition associated with the executed SCPAC procedure is configured by MN, then the UE executes the SPR determination process based on the SPR configuration configured by PCell; if the execution condition associated with the executed SCPAC procedure is configured by SN, then the UE executes the SPR determination process based on the SPR configuration configured by the source PSCell.

[0088] In implementation method 4, if the execution condition associated with the executed SCPAC procedure is obtained directly from the condExecutionCond information element in the received RRC message by the UE, then the UE considers the executed SCPAC procedure to be the first-hop SCPAC initiated by the MN. If the execution condition associated with the executed SCPAC procedure is obtained from the subsequentCondExecutionCondSCG, then the UE considers the executed SCPAC procedure to be the next-hop SCPAC or the executed SCPAC procedure not to be the first-hop SCPAC initiated by the MN.

[0089] Optionally, the `subsequentCondExecutionCondSCG` information element is included in the `subsequentCondReconfig` information element. The `subsequentCondReconfig` information element is contained in the `CondReconfigToAddMod` item corresponding to the executed SCPAC procedure.

[0090] Optionally, the pointer is not inherited directly from the condExecutionCond information element in the received RRC message, but rather from the subsequentCondReconfig information element in the received RRC message.

[0091] Therefore, in implementation method 4, step 202 can be further executed as follows: During the UE's SPR determination process, if the execution condition associated with the executed SCPAC procedure is obtained directly from the condExecutionCond information element in the received RRC message, then the UE executes the SPR determination process based on the SPR configuration configured in the PCell; if the execution condition associated with the executed SCPAC procedure is obtained from subsequentCondExecutionCondSCG, then the UE executes the SPR determination process based on the SPR configuration configured in the source PSCell. Optionally, further, if the execution condition associated with the executed SCPAC procedure is obtained directly from the condExecutionCond information element in the received RRC message, and the condition reconfiguration corresponding to the SCPAC procedure does not include the sn-InitiatedPSCellChange information element, then the UE executes the SPR determination process based on the SPR configuration configured in the PCell;

[0092] In implementation method 5, a method based on sn-InitiatedPSCellChange configuration is provided. When configuring the SCPAC initiated by the MN to the UE, the network side does not configure the sn-InitiatedPSCellChange indication in each SCPAC configuration item. When the SCPAC procedure executed by the UE is a next-hop SCPAC, the UE considers that sn-InitiatedPSCellChange is configured (set to true) in the SCPAC configuration, and then the UE performs the SPR determination procedure based on the SPR configuration configured in the source PSCell. Optionally, if the SCPAC procedure executed by the UE is a first-hop SCPAC, then because the sn-InitiatedPSCellChange indication is not configured in its conditional reconfiguration, the UE considers the procedure to be initiated or configured by the MN, and then performs the SPR determination procedure based on the SPR configuration configured in the PCell. Optionally, further, when the SCPAC procedure executed by the UE is a next-hop SCPAC, if the sn-InitiatedPSCellChange information element is not configured in the conditional reconfiguration item corresponding to the SCPAC procedure, the UE assumes that sn-InitiatedPSCellChange is configured in the SCPAC configuration (set to true), and then the UE performs the SPR determination procedure based on the SPR configuration configured in the source PSCell.

[0093] In implementation method 6, a method based on sn-InitiatedPSCellChange configuration is provided. When configuring the SCPAC initiated by the MN to the UE, the network side configures the sn-InitiatedPSCellChange indication in each SCPAC configuration item. When the SCPAC procedure executed by the UE is a first-hop SCPAC, the UE considers that sn-InitiatedPSCellChange is not configured in the SCPAC configuration, that is, it ignores the sn-InitiatedPSCellChange indication configured in the conditional reconfiguration corresponding to the SCPAC procedure. Then, the UE performs the SPR determination procedure based on the SPR configuration configured in the PCell. Optionally, if the SCPAC procedure executed by the UE is a next-hop SCPAC, then because the sn-InitiatedPSCellChange indication is configured in its conditional reconfiguration, the UE considers that the procedure is initiated or configured by the SN, and performs the SPR determination procedure based on the SPR configuration configured in the PSCell.

[0094] In implementation method 7, a method based on sn-InitiatedPSCellChange configuration is provided. When configuring MN-initiated SCPAC to the UE, the network side configures a sn-InitiatedPSCellChange indication in each SCPAC configuration item, and also configures another mn-InitiatedSCPAC indication. When the SCPAC procedure executed by the UE is a first-hop SCPAC, if the mn-InitiatedSCPAC indication is included in the conditional reconfiguration corresponding to the executed SCPAC procedure, the UE considers that sn-InitiatedPSCellChange has not been configured in the SCPAC configuration, that is, it ignores the sn-InitiatedPSCellChange indication configured in the conditional reconfiguration corresponding to the SCPAC procedure. Then, the UE performs the SPR determination procedure based on the SPR configuration configured in the PCell. In this implementation method, the mn-InitiatedSCPAC indication is configured by the MN to indicate that the received SCPAC configuration is an MN-initiated SCPAC configuration procedure. Optionally, if the SCPAC procedure executed by the UE is a next-hop SCPAC, then because its conditional reconfiguration includes the sn-InitiatedPSCellChange indication, the UE considers the procedure to be initiated or configured by the SN, and performs the SPR determination procedure based on the SPR configuration configured in the PSCell. Optionally, further, when the UE executes the SCPAC procedure, if the conditional reconfiguration item corresponding to the SCPAC procedure (such as CondReconfigToAddMod) includes both sn-InitiatedPSCellChange and mn-InitiatedSCPAC, the UE ignores the sn-InitiatedPSCellChange indication configured in the conditional reconfiguration corresponding to the SCPAC procedure, and performs the SPR determination procedure based on the SPR configuration configured in the PCell.

[0095] Optionally, the UE considers that sn-InitiatedPSCellChange is configured in the SCPAC configuration, meaning the UE considers that sn-InitiatedPSCellChange is configured in the RRC reconfiguration message containing the last applied RRC reconfiguration message carrying synchronization reconfiguration for SCG. The UE considers that sn-InitiatedPSCellChange is not configured in the SCPAC configuration, meaning the UE considers that sn-InitiatedPSCellChange is not configured in the RRC reconfiguration message containing the last applied RRC reconfiguration message carrying synchronization reconfiguration for SCG.

[0096] Optionally, the UE may determine whether the executed SCPAC procedure is a next-hop SCPAC based on any of the aforementioned implementation methods 1 to 4, but is not limited to using the methods in implementation methods 1 to 4.

[0097] Example 3

[0098] This embodiment provides a method for SPR information reporting in an SCPAC scenario implemented on a UE. Using this method, the UE can determine whether the SPR contains the time information and what time information is included in the SPR. This allows the network side to determine whether the SPR corresponds to an SCPAC process or a traditional PSCell change process based on the information, thereby differentiating between different scenarios, achieving more refined analysis of statistical data, and enabling more optimized movement parameter adjustments.

[0099] In SPR version 18, when the PSCell procedure executed by the UE is a CPAC procedure, i.e., the last applied RRC message containing the synchronous reconfiguration for SCG is included in the saved conditional reconfiguration condRRCReconfig, the UE sets the first time information (denoted as timeSinceCPAC-Reconfig) as the time elapsed from the initiation of the conditional reconfiguration execution of the target PSCell to the reception of the last conditional reconfiguration containing the target PSCell. The network side can determine whether the CPAC configuration of the target PSCell is sent too early or too late based on this time information. In traditional CPAC scenarios, the CPAC configuration is always a single hop, i.e., all saved CPAC configurations are released after execution. However, in SCPAC scenarios, because there are multiple consecutively executed SCPAC procedures, the SCPAC configuration is sent to the UE multiple hops in advance. Therefore, the first time information cannot achieve the above function in SCPAC scenarios. Therefore, this embodiment proposes a corresponding solution to this problem.

[0100] Considering that the role of this timing information is unclear in SCPAC scenarios, a feasible approach is that if the UE determines that it is executing an SCPAC procedure, then the UE does not record this initial timing information in the SPR, as follows:

[0101] When the UE performs the SPR determination operation, the UE sets the contents of the SPR as follows: If the last applied RRC message containing the synchronization reconfiguration for SCG is included in the saved conditional reconfiguration condRRCReconfig, and the RRC reconfiguration message is not applied because of SCPAC, the UE sets the first time information to the time elapsed from the initiation of the conditional reconfiguration execution of the target PSCell to the reception of the last conditional reconfiguration (including the conditionalReconfiguration of condRRCReconfig) of the target PSCell.

[0102] Optionally, further, the statement that the RRC reconfiguration message is not applied because of SCPAC also includes the statement that the RRC reconfiguration message is applied because of the execution of the next-hop SCPAC. The determination of the next-hop SCPAC can be found in other embodiments, and will not be elaborated here.

[0103] Optionally, the RRC reconfiguration message not being applied due to SCPAC means that the RRC reconfiguration message does not contain the subsequentCondReconfig information element, or the RRC reconfiguration message containing the RRC reconfiguration message does not contain the subsequentCondReconfig information element, or the condReconfigToAddMod containing the RRC reconfiguration message does not contain the subsequentCondReconfig information element.

[0104] Example 4

[0105] Based on the problems described in Embodiment 3, Embodiment 4 provides another method for SPR information reporting in an SCPAC scenario implemented on a UE.

[0106] Considering that the role of the first time information in Example 3 is unclear in the SCPAC scenario, another feasible method is that if the UE determines that it is executing an SCPAC procedure, then the UE records another second time information in the SPR. The network side can then determine that the PSCell change procedure corresponding to the SPR is an SCPAC procedure based on the first and second time information, thereby determining the validity of the time information. Specifically:

[0107] When the UE performs the SPR determination operation, the UE sets the contents of the SPR as follows: if the last applied RRC message containing the synchronization reconfiguration for SCG is included in the saved conditional reconfiguration condRRCReconfig, and the RRC reconfiguration message is applied because of SCPAC, the UE sets the second time information to the time elapsed from the initiation of the conditional reconfiguration execution of the target PSCell to the last PSCell change or CPAC executed before the execution of this conditional reconfiguration process.

[0108] Optionally, further, the application of the RRC reconfiguration message due to SCPAC also includes the application of the RRC reconfiguration message due to the execution of the next-hop SCPAC. The determination of the next-hop SCPAC can be found in other embodiments, and will not be elaborated here.

[0109] Optionally, the RRC reconfiguration message applied because of SCPAC refers to the RRC reconfiguration message containing the subsequentCondReconfig information element, or the RRC reconfiguration message containing the subsequentCondReconfig information element, or the condReconfigToAddMod containing the RRC reconfiguration message containing the subsequentCondReconfig information element.

[0110] Example 5

[0111] Based on the problems described in Embodiment 3, Embodiment 5 provides another method for SPR information reporting in an SCPAC scenario implemented on a UE.

[0112] Considering that the role of the first time information in Example 3 is unclear in the SCPAC scenario, another feasible method is that if the UE determines that it is executing an SCPAC procedure, then the UE records an SCPAC indication in the SPR. The network side can then determine that the PSCell change procedure corresponding to the SPR is an SCPAC procedure based on the first time information and the indication, thereby determining the validity of the time information. Specifically:

[0113] When the UE performs the SPR determination operation, the UE sets the contents of the SPR as follows: if the last applied RRC message containing the synchronization reconfiguration for SCG was applied because of SCPAC, the UE sets / includes an SCPAC message indicating that the execution of the PSCell change procedure is an SCPAC procedure.

[0114] Optionally, the execution of the PSCell change procedure is an SCPAC procedure, meaning that the PSCell change procedure or the RRC reconfiguration message applied by the PSCell change procedure is executed when performing a conditional reconfiguration execution operation for SCPAC.

[0115] Optionally, and further, the included SCPAC information indicates that the RRC reconfiguration message was applied because of a next-hop SCPAC execution, that is, it indicates that the executed SCPAC procedure is a next-hop SCPAC execution. The determination of the next-hop SCPAC can be found in other embodiments, and will not be elaborated here.

[0116] Example 6

[0117] This embodiment provides a method for setting radio link reporting information on a UE.

[0118] In the existing CHO with candidate SCG scenario, if the UE is configured with CHO with candidate SCG, then when the UE experiences SCG failure, the UE stops the condition evaluation of CHO with candidate SCG during the initiated SCG failure information flow. However, in other cases, the condition evaluation of CHO with candidate SCG is not stopped. In the existing radio link report, if a saved CHO configuration exists at the time of link failure, the UE will include the status information of the corresponding CHO execution conditions at the time of the link failure in the radio link report. The network side can use this status information to determine whether the CHO configuration is too conservative, thereby adjusting the corresponding CHO execution conditions to improve the success rate of subsequent CHO execution and the robustness of UE mobility. When a UE is configured with CHO with candidate SCG, if an SCG failure occurs first, and the UE stops the condition evaluation of SCG with candidate SCG, and then an MCG radio link failure occurs, the existing radio link report method for reporting the status information of the execution condition corresponding to the CHO will still be used. However, the provided status information will not reflect the status at the time of the MCG failure because the corresponding condition evaluation operation stopped before the MCG failure. Therefore, the CHO information in the existing radio link failure report is not necessarily applicable to the CHO with candidate SCG scenario. This embodiment provides a solution to this problem. With the method described in this embodiment, when the UE includes the execution condition status information of a CHO configuration in the radio link failure report, it also includes information informing the network side whether the execution condition was stopped before the MCG link failure occurred. The network side can determine the validity of the execution condition status information based on this information.

[0119] The following is a detailed description of Embodiment 6 of this disclosure. Figure 3 This is a schematic flowchart illustrating the information reporting method in Embodiment 6 of this disclosure, as shown below. Figure 3 As shown, the information reporting method in Embodiment 6 of this disclosure may include the following steps.

[0120] Step 601: The UE experiences an MCG radio link failure or handover failure (T304 timeout).

[0121] Step 602: The UE stores relevant failure information in the radio link failure report variable. Specifically, this includes: for each neighboring cell included in the neighboring cell measurement results, if the UE supports the radio link failure reporting function for conditional handover, and when an MCG failure is detected, the neighboring cell is a candidate cell in the masterCellGroup of the conditional reconfiguration variable VarConditionalReconfig included in the MCG, and if the candidate cell is a candidate cell with a CHO with a candidate SCG and the conditional evaluation corresponding to the candidate cell is stopped before the MCG failure is detected, then a message is set to indicate that the conditional evaluation corresponding to the candidate cell is stopped before the MCG failure is detected. Optionally, the message is set to true.

[0122] Optionally, a candidate cell is a CHO with candidate SCG, meaning that the CHO configuration of the candidate cell includes execution conditions for PSCell (such as condExecutionCondPSCell).

[0123] Optionally, the performance condition assessment refers to the condition reconfiguration assessment.

[0124] Optionally, "included in neighbor cell measurement results" refers to the measResultListNR information element contained within the measResultNeighCells information element.

[0125] Example 7

[0126] This embodiment provides an alternative method for setting radio link report information on the UE to address the problem in Embodiment 6. Using this method, when the UE includes execution condition status information configured by a CHO in the radio link failure report, it determines whether the execution condition was stopped before the MCG link failure occurred. If so, the UE does not include the execution condition status information configured by the CHO in the radio link failure report, thereby avoiding unnecessary or erroneous radio link failure information reporting, which incurs information overhead and misleads the network side.

[0127] As an example, this embodiment includes the following steps:

[0128] Step 701: The UE experiences an MCG radio link failure or handover failure (T304 timeout).

[0129] Step 702: The UE stores relevant failure information in the radio link failure report variable. Specifically, this includes: for each neighboring cell included in the neighboring cell measurement results, if the UE supports the radio link failure reporting function for conditional handover, and when an MCG failure is detected, the neighboring cell is a candidate cell in the masterCellGroup of the conditional reconfiguration variable VarConditionalReconfig in the MCG, and the candidate cell is not a candidate cell of CHO with candidate SCG, then the UE includes the status information of the execution conditions of the candidate cell in the radio link failure report, that is, performs one or more of the following operations:

[0130] Operation 10: Set the choConfig information element to the execution condition of each measurement identifier in the condTriggerConfig associated with the neighboring cell, which is included in the conditional reconfiguration variable of the MCG;

[0131] Operation 11: If the MCG wireless link fails or the handover fails, and the first item in choConfig corresponds to a satisfied execution condition or the second item in choConfig corresponds to a satisfied execution condition: Set the firstTriggeredEvent information element to the execution condition condFirstEvent corresponding to the first item in choConfig or the execution condition condSecondEvent corresponding to the second item in choConfig that is satisfied first in time; set the timeBetweenEvents information element to the time elapsed between the time when the first execution condition in choConfig is satisfied and the time when the second execution condition in choConfig is satisfied.

[0132] Optionally, the candidate cell not being a CHO with candidate SCG can be replaced by the candidate cell's condition evaluation not being stopped before MCG failure is detected. Alternatively, the candidate cell not being a CHO with candidate SCG can be replaced by the candidate cell being a CHO with candidate SCG and the candidate cell's condition evaluation not being stopped before MCG failure is detected.

[0133] Optionally, a candidate cell that is a CHO with a candidate SCG means that the CHO configuration of the candidate cell includes execution conditions for PSCell (such as condExecutionCondPSCell). A candidate cell that is not a CHO with a candidate SCG means that the CHO configuration of the candidate cell does not include execution conditions for PSCell (such as condExecutionCondPSCell).

[0134] Optionally, the performance condition assessment refers to the condition reconfiguration assessment.

[0135] Optionally, "included in neighbor cell measurement results" refers to the measResultListNR information element contained within the measResultNeighCells information element.

[0136] Example 8

[0137] This embodiment provides an information reporting method performed on a UE. It describes the signaling flow method when a UE reports the SPR information or SON report described in the preceding embodiments via the RRC procedure.

[0138] Figure 4 This is a schematic flowchart illustrating the information reporting method in Embodiment 8 of this disclosure, as shown below. Figure 4 As shown, the information reporting method in Embodiment 8 of this disclosure may include the following steps.

[0139] Step 801: The UE receives a UEInformationRequest message from the network side.

[0140] Step 802: If the UEInformationRequest carries an indication / request for the UE to report a saved SPR, the UE includes the content of the saved SPR in a UEInformationResponse message and sends the UEInformationResponse message to the network side. The SPR report included in the UEInformationResponse message contains at least one or more of the SPR information described in embodiments 1 to 5 above. If the UEInformationRequest carries an indication / request for the UE to report a saved RLF report, the UE includes the content of the saved RLF report in a UEInformationResponse message and sends the UEInformationResponse message to the network side. The RLF report included in the UEInformationResponse message contains at least one or more of the RLF information described in embodiments 6 or 7 above.

[0141] Example 9

[0142] This embodiment illustrates the user equipment (UE) of this disclosure. Figure 5 This is a block diagram illustrating the user equipment (UE) involved in this invention. For example... Figure 5 As shown, the user equipment UE10 includes a processor 101 and a memory 102. The processor 101 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 102 may include, for example, volatile memory (such as random access memory, RAM), a hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory. Program instructions are stored on the memory 102. When executed by the processor 101, these instructions can perform the information reporting method described in detail herein.

[0143] The methods and related devices of this disclosure have been described above in conjunction with preferred embodiments. Those skilled in the art will understand that the methods shown above are merely exemplary. The methods of this disclosure are not limited to the steps and sequence shown above. The base station and user equipment shown above may include more modules, such as modules that can be developed or will be developed in the future for use in base stations, MMEs, or UEs, etc. The various identifiers shown above are exemplary and not limiting, and this disclosure is not limited to the specific information elements exemplified by these identifiers. Those skilled in the art can make many variations and modifications based on the teachings of the illustrated embodiments.

[0144] A program running on a device according to this disclosure may be a program that enables a computer to perform the functions of embodiments of this disclosure by controlling a central processing unit (CPU). The program or the 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.

[0145] Programs used to implement the functions of the embodiments of this disclosure can be recorded on a computer-readable recording medium. The corresponding functions can be implemented by causing a computer system to read and execute the programs recorded on the recording medium. The term "computer system" here can refer to a computer system embedded in the device, and may include an operating system or hardware (such as peripheral devices). "Computer-readable recording medium" can be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a short-time dynamic storage program recording medium, or any other computer-readable recording medium.

[0146] Various features or functional modules of the devices used in the above embodiments can be implemented or executed by circuits (e.g., monolithic 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 devices. A general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine. The circuits described above may be digital circuits or analog circuits. In cases where advancements in semiconductor technology have led to new integrated circuit technologies that replace existing integrated circuits, one or more embodiments of this disclosure may also be implemented using these new integrated circuit technologies.

[0147] Furthermore, this disclosure is not limited to the embodiments described above. Although various examples of the embodiments have been described, this disclosure is not limited thereto. Fixed or non-mobile electronic devices installed indoors or outdoors can be used as terminal devices or communication devices, such as AV equipment, kitchen equipment, cleaning equipment, air conditioners, office equipment, vending machines, and other household appliances.

[0148] As described above, embodiments of this disclosure have been described in detail with reference to the accompanying drawings. However, the specific structure is not limited to the above embodiments, and this disclosure also includes any design modifications that do not depart from the spirit of this disclosure. Furthermore, various modifications can be made to this disclosure within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included within the technical scope of this disclosure. In addition, components with the same effects described in the above embodiments can be substituted for each other.

Claims

1. An information reporting method performed on a UE, comprising: After successfully completing the primary and secondary cell PSCell change process, the user equipment (UE) in dual connectivity executes the process of determining the successful addition of the PSCell change report (SPR). The UE determines to store the information of the successful PSCell change in the UE variable used to store the SPR; The UE determines whether the SPR determination process is based on the primary cell PCell configuration or the source PSCell configuration, depending on whether the PSCell change process is initiated by the primary site MN and the subsequent conditional PSCell adds a change SCPAC. If the PSCell change procedure is the first-hop SCPAC execution initiated by the MN, the UE performs the SPR determination procedure based on the SPR configuration configured in the PCell; if the PSCell change procedure is the next-hop SCPAC execution, the UE performs the SPR determination procedure based on the SPR configuration configured in the source PSCell.

2. The information reporting method according to claim 1, wherein, The UE determines whether the SPR determination process is based on the primary cell PCell configuration or the source PSCell configuration, based on whether the PSCell change process is initiated by the primary site MN and the subsequent conditional PSCell adds a change SCPAC. This process includes: If the measurement identifier of the execution condition associated with the executed SCPAC procedure is a measurement identifier associated with the measurement configuration of the primary cell group (MCG), the UE performs the SPR determination procedure based on the SPR configuration configured in the PCell; if the measurement identifier of the execution condition associated with the executed SCPAC procedure is a measurement identifier associated with the measurement configuration of the secondary cell group (SCG), the UE performs the SPR determination procedure based on the SPR configuration configured in the source PSCell.

3. The information reporting method according to claim 1, wherein, The UE determines whether the SPR determination process is based on the primary cell PCell configuration or the source PSCell configuration, based on whether the PSCell change process is initiated by the primary site MN and the subsequent conditional PSCell adds a change SCPAC. This process includes: If the measurement event corresponding to the measurement identifier of the execution condition associated with the executed SCPAC procedure is A4, the UE performs the SPR determination procedure based on the SPR configuration configured in the PCell; if the measurement event corresponding to the measurement identifier of the execution condition associated with the executed SCPAC procedure is A3 or A5, the UE performs the SPR determination procedure based on the SPR configuration configured in the source PSCell.

4. The information reporting method according to claim 1, wherein, The UE determines whether the SPR determination process is based on the primary cell PCell configuration or the source PSCell configuration, based on whether the PSCell change process is initiated by the primary site MN and the subsequent conditional PSCell adds a change SCPAC. This process includes: If the execution condition associated with the SCPAC procedure is configured by MN, the UE performs the SPR determination procedure based on the SPR configuration configured by PCell; if the execution condition associated with the SCPAC procedure is configured by SN, the UE performs the SPR determination procedure based on the SPR configuration configured by the source PSCell.

5. The information reporting method according to claim 1, wherein, The UE determines whether the SPR determination process is based on the primary cell PCell configuration or the source PSCell configuration, based on whether the PSCell change process is initiated by the primary site MN and the subsequent conditional PSCell adds a change SCPAC. This process includes: If the execution condition associated with the executed SCPAC procedure is obtained directly by the UE from the condExecutionCond information element in the received Radio Resource Control (RRC) message, the UE executes the SPR determination procedure based on the SPR configuration configured in the PCell; if the execution condition associated with the executed SCPAC procedure is obtained from the subsequentCondExecutionCondSCG information element, the UE executes the SPR determination procedure based on the SPR configuration configured in the source PSCell.

6. The information reporting method according to claim 1, wherein, The UE determines whether the SPR determination process is based on the primary cell PCell configuration or the source PSCell configuration, based on whether the PSCell change process is initiated by the primary site MN and the subsequent conditional PSCell adds a change SCPAC. This process includes: When the SCPAC procedure executed by the UE is a next-hop SCPAC execution, the UE assumes that the sn-InitiatedPSCellChange information element is configured in the SCPAC configuration item, and the UE performs the SPR determination process based on the SPR configuration configured in the source PSCell.

7. The information reporting method according to claim 1, wherein, The UE determines whether the SPR determination process is based on the primary cell PCell configuration or the PSCell configuration, depending on whether the PSCell change process is initiated by the primary site MN and the subsequent conditional PSCell adds a change SCPAC. This process includes: If the mn-InitiatedSCPAC information element is included in the conditional reconfiguration corresponding to the executed SCPAC procedure, the UE assumes that sn-InitiatedPSCellChange is not configured in the SCPAC configuration, ignores the sn-InitiatedPSCellChange indication included in the conditional reconfiguration corresponding to the SCPAC procedure, and performs the SPR determination process based on the SPR configuration configured in the PCell.

8. The information reporting method according to claim 6 or claim 7, wherein, The mn-InitiatedSCPAC information element is used to indicate that the received SCPAC configuration is an MN-initiated SCPAC configuration process. The sn-InitiatedPSCellChange information element is used to indicate that the PSCell change process corresponding to the SPR was initiated by the SN.

9. An information reporting method performed on a UE, comprising: User equipment (UE) performs the operation when it receives a Radio Resource Control (RRC) reconfiguration message; If the executed RRC reconfiguration message contains a synchronous reconfiguration for the secondary cell group SCG, and the RRC reconfiguration is applied not because of the subsequent execution of the primary / secondary cell addition change SCPAC, and the UE is configured with a successful primary / secondary cell addition change report SPR, then the SPR determination operation is executed after the primary / secondary cell PSCell change process is successfully completed.

10. A user equipment, comprising: processor; as well as A memory, on which instructions are stored; When the instruction is executed by the processor, it causes the user equipment to perform the information reporting method according to any one of claims 1-9.

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