WO2024094056A1

WO2024094056A1 - Information reporting method and user equipment

Info

Publication number: WO2024094056A1
Application number: PCT/CN2023/129039
Authority: WO
Inventors: 常宁娟; 刘仁茂
Original assignee: 夏普株式会社; 常宁娟
Priority date: 2022-11-01
Filing date: 2023-11-01
Publication date: 2024-05-10
Also published as: CN118042643A

Abstract

Provided in the present disclosure are an information reporting method and a user equipment. The information reporting method comprises: after a user equipment (UE) in dual connectivity successfully performs a primary secondary cell (PSCell) change procedure, the UE determining whether the PSCell change procedure is accompanied by a failure of a primary cell (PCell) handover procedure; and, when determining that the PSCell change procedure is accompanied by the primary cell (PCell) handover failure, the UE incorporating into an SPR information used for indicating the PCell handover failure.

Description

Information reporting method and user equipment

Technical Field

The present 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-connection situation and a corresponding user equipment.

Background technique

In December 2021, a new research project for Release 18 technical standards was approved at the RAN#94e plenary meeting of the 3rd Generation Partnership Project (3GPP) (see non-patent document: RP-213553: New WID on further enhancement of data collection for SON (Self-Organizing Networks)/MDT (Minimization of Drive Tests) in NR and EN-DC). The purpose of this project is to further enhance the network data collection process in the NR system based on Release 17 to better achieve the purpose of self-organizing and self-optimizing network and minimizing drive tests. One of the specific technologies studied is to realize information reporting in the scenario of successful change of primary and secondary cell group Cell (PSCell).

The present disclosure proposes a solution to the problem of how to implement PSCell information reporting in the NR system.

Summary of the invention

The purpose of the embodiments of the present disclosure is to propose a solution to the problem of how to implement PSCell information reporting in an NR system. More specifically, the present disclosure proposes a solution to the problem of how to record PSCell change information after successfully executing the PSCell change process when the UE is configured with dual connectivity (DC) in an NR system. The embodiments of the present disclosure provide an information reporting method executed in a user equipment and a corresponding user equipment.

According to the first aspect of the present disclosure, an information reporting method is proposed, comprising: after a dual-connected user equipment UE successfully completes a primary and secondary cell PSCell change process, the UE determines whether a primary cell PCell switch accompanying the PSCell change process fails; after determining whether a primary cell PCell switch failure accompanying the PSCell change process In the SPR, at least one of the following information is included: first information for indicating that a PCell switch is executed simultaneously with a PSCell change event; second information for indicating that a PCell switch executed simultaneously with a PSCell change event fails; and third information for indicating source PCell information or target PCell information corresponding to a PCell switch executed simultaneously with a PSCell change event.

In the information reporting method of the first aspect above, preferably, the UE performs an SPR determination process when the PSCell is changed successfully, and includes the SPR information in the SPR.

In the information reporting method of the first aspect above, preferably, the successful completion of the PSCell change is the successful completion of a random access process to the PSCell triggered by the PSCell change.

In the information reporting method of the first aspect above, preferably, the UE performs an SPR determination process when the timer T304 for the MCG times out, and includes the SPR information in the SPR.

In the information reporting method of the first aspect above, preferably, when the RRC message used to trigger the PSCell change includes both the synchronous reconfiguration for the SCG and the synchronous reconfiguration for the MCG, the UE determines that the PSCell change process is accompanied by the PCell switching.

In the information reporting method of the first aspect above, preferably, the PCell information includes a cell identifier corresponding to the PCell or a measurement result of the PCell.

In the information reporting method of the first aspect above, preferably, before the UE performs a PSCell change, an SPR configuration is received from the network side, the SPR configuration includes configuration parameters for triggering SPR, and the SPR determination process is performed based on the SPR configuration.

In the information reporting method of the first aspect above, preferably, the configuration information indicates whether the UE generates an SPR when the PSCell change is successfully completed and the PCell switching performed simultaneously fails.

In the information reporting method of the first aspect above, preferably, when the UE receives a UEInformationRequest message from the network side, and the UEInformationRequest message carries an indication/request for requesting the UE to report the stored SPR, the UE includes the content of the stored SPR in UEInformationResponse message and sent to the network side.

According to a second aspect of the present disclosure, a user equipment UE is proposed, comprising: a processor; and a memory storing instructions; wherein the instructions, when executed by the processor, execute the information reporting method according to the context.

Beneficial effects of the present invention

According to the above-mentioned information reporting method performed by the user equipment and the user equipment of the present invention, the network side can be informed of the cell change situation in the scenario of PCell switching accompanied by PSCell change, thereby realizing the adjustment and optimization of mobility parameters.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present disclosure and its advantages, reference will now be made to the following description taken in conjunction with the accompanying drawings, in which:

FIG1 is a schematic flow chart showing an information reporting method in Embodiment 1 of the present disclosure.

FIG. 2 is a schematic flow chart showing an information reporting method in Embodiment 2 of the present disclosure.

FIG3 is a schematic flow chart showing an information reporting method in Embodiment 3 of the present disclosure.

FIG4 is a schematic flow chart showing an information reporting method in Embodiment 4 of the present disclosure.

FIG5 is a schematic flow chart showing an information reporting method in Embodiment 5 of the present disclosure.

FIG6 is a schematic flow chart showing an information reporting method in Embodiment 6 of the present disclosure.

FIG. 7 is a block diagram showing a user equipment UE involved in the present disclosure.

In the drawings, the same or similar structures are marked with the same or similar reference numerals.

Detailed ways

Other aspects, advantages and salient features of the 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.

In this disclosure, the terms "include" and "including" and their derivatives mean inclusion rather than limitation; the term "or" is inclusive, meaning and/or.

In this specification, the various embodiments used to describe the principles of the present disclosure are merely illustrative and should not be interpreted in any way as limiting the scope of the disclosure. The exemplary embodiments of the present disclosure as defined by the claims and their equivalents are helpful for a comprehensive understanding. The following description includes a variety of specific details to help understanding, but these details should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. In addition, for the sake of clarity and brevity, descriptions of well-known functions and structures are omitted. In addition, throughout the drawings, the same reference numerals are used for similar functions and operations.

The following uses the Long Term Evolution (LTE)/NR mobile communication system and its subsequent evolution versions as example application environments to specifically describe multiple implementations according to the present disclosure. It should be noted that the present disclosure is not limited to the following implementations, but is applicable to many other wireless communication systems. Unless otherwise specified, in the present disclosure, the concepts of cell, base station and cell group can be interchangeable; the LTE system is also used to refer to 5G and subsequent LTE systems (such as eLTE systems, or LTE systems that can be connected to a 5G core network), and LTE can be replaced by Evolved Universal Terrestrial Radio Access (Evolved Universal Terrestrial Radio Access, E-UTRA) or Evolved Universal Terrestrial Radio Access Network E-UTRAN. The present disclosure involves changes in the primary cell PCell and changes in the primary and secondary cells PSCell. Among them, the change in the primary cell PCell is also called switching. The source main base station, the source main beam, the source main transmission point (Transmission point, TRP), the source primary cell (Primary Cell, PCell), and the source main cell group (Master Cell Group, MCG) can be replaced; the target main base station, the target main beam, the target main transmission point, the target main cell PCell, and the target main cell group MCG can be replaced. Similarly, the source PSCell, the source secondary base station, the source secondary cell group (Secondary Cell Group, SCG), the source secondary beam, and the source secondary transmission point (Transmission point, TRP) can be replaced; the target PSCell, the target secondary base station, the target secondary beam, the target secondary transmission point, and the target secondary cell group SCG can be replaced. In the present disclosure, the switching command is used to trigger the UE to perform a switching, and the PSCell change command is used to trigger the UE to perform a PSCell change. In the NR system, it is an RRC reconfiguration message containing a synchronous reconfiguration (Reconfigurationwithsync) information element. Specifically, the handover command is an RRC reconfiguration message containing a synchronous reconfiguration (Reconfigurationwithsync) information element for MCG; the PSCell change command is an RRC reconfiguration message containing a synchronous reconfiguration (Reconfigurationwithsync) information element for SCG. At this time, Switching can also be called synchronous reconfiguration of MCG or synchronous reconfiguration of PCell; PSCell change can also be called synchronous reconfiguration of SCG or synchronous reconfiguration of PSCell. Among them, the synchronous reconfiguration information element may include configuration information of the target cell, such as target cell identifier, target cell frequency, public configuration of the target cell such as system information, random access configuration used by UE to access the target cell, security parameter configuration of UE in the target cell, wireless bearer configuration of UE in the target cell, etc. Cancellation, release, deletion, clearing and clearing can be replaced. Execution, use and application can be replaced. Configuration and reconfiguration can be replaced. Monitoring (monitor) and detection (detect) can be replaced. For the convenience of description, PCell changes and PSCell changes are also collectively referred to as cell changes.

The following describes processes or concepts in the prior art to which the present disclosure relates.

Cell change configuration in NR system:

In the NR system, the RRC reconfiguration message for the cell change command carries the RRC configuration from the target base station, including but not limited to the following RRC configuration (see Section 6-2-2 of 3GPP Technical Standard Protocol 38-331 for details):

- Measurement configuration: used to configure the intra-frequency, inter-frequency and inter-RT measurements performed by the UE, such as measurement object configuration, measurement reporting configuration, measurement gap configuration, etc.

-Cell group configuration (cellGroupConfig information element), used to configure the secondary cell group. Including the radio link control (Radio Link Control, RLC) bearer configuration (rlc-bearerToAddModList information element and rlc-bearerToreleaselist information element) corresponding to the data radio bearer/signaling radio bearer, medium access control (Medium Access Control, MAC) configuration (MAC-cellgroupconfig information element), physical layer configuration, secondary cell addition/modification/release configuration, special cell (Special cell, SpCell) configuration, etc. Among them, the SpCell configuration includes the cell index number, cell change information (reconfigurationWithSync information element), radio link failure related timer and constant configuration, radio link detection (Radio Link Monitoring, RLM) configuration, special cell dedicated configuration, etc. Among them, the reconfigurationwithsync information element includes cell change related information such as serving cell configuration public information, UE's cell radio network temporary identification (Cell-Radio Network Temprory Identifier, C-RNTI) in the target cell, cell Change the process monitoring timer T304 configuration, the random access dedicated configuration used for the random access process to the target cell, etc.

-Radio bearer configuration (radiobearerConfig information element), used to configure the Service Data Application Protocol (SDAP) and Packet Data Convergence Protocol (PDCP) of the Data Radio Bearer (DRB) and/or Signaling Radio Bearer (SRB).

-Key update configuration.

Dual Connectivity:

In order to improve the data transmission efficiency of UE, UE establishes links with two base stations at the same time, that is, the wireless resources used by UE are provided by different schedulers located in the two base stations. The wireless access between these two base stations and UE can be the same or different standards (Radio Access Technology, RAT), such as both are NR, or one is NR and the other is LTE, also known as Evolved Universal Terrestrial Radio Access (E-UTRA). Among these two base stations, one is called the master base station (Master Node, MN) or MgNB, MeNB, and the service cell group under the master base station is called the master cell group (Master Cell Group, MCG); the other is called the secondary base station (Secondary Node, SN) or SgNB, SeNB, and the service cell group under the secondary base station is called the secondary cell group (Secondary Cell Group, SCG). When the master base station is LTE and the secondary base station is NR, the DC is called EN-DC (using 4G core network) or NGEN-DC (using 5G core network); when the master base station and the secondary base station are both NR, the DC is called NR-DC. MCG contains a primary cell (PCell) and optionally one or more secondary cells (SCell). PCell operates on the main frequency, and the UE performs the initial connection establishment process or the connection re-establishment process through the main frequency. SCG contains a primary SCG cell (PSCell) and optionally one or more SCells. PSCell refers to the SCG cell to which the UE performs random access when performing the synchronous reconfiguration process of the SCG. PCell and PSCell are also collectively referred to as special cells SpCell. When DC is configured, DRB and SRB for UE are supported to be configured as split bearers. When not configured as split SRB, SRB1 and SRB2 are transmitted through the MCG path. In addition, when DC is configured, SRB3 can also be established for SN to transmit SN and UE The establishment and release of SRB3 are determined by SN.

Switching in NR system:

The user mobility of PCell in the connected state is mainly achieved through the handover process. The handover refers to the process of changing the PCell by the UE in the RRC connected state. The general handover process includes the following stages: Stage 1: Measurement stage. The UE measures the radio link corresponding to the serving cell or the neighboring cell based on the configured measurement parameters. When the configured measurement reporting conditions are met, the UE sends a measurement report to the base station. Stage 2: Handover preparation stage. The base station determines to trigger the handover for the UE based on the received measurement report and other factors such as the base station load. The source base station and the target base station obtain the handover command configured by the target base station through the handover preparation process. Stage 3: Handover execution stage. The source base station sends the handover command to the UE, and the UE that receives the handover command immediately applies the configuration of the handover command to perform the handover. The UE detects the handover process through a timer T304. When the handover process is initiated, the UE starts the T304 timer; when the handover process is completed, the UE stops the timer T304; when T304 times out, the UE considers that the handover has failed.

NR systems of version 16 and later also support conditional handover (CHO). Unlike the general handover process stage 3, in which the UE performs handover immediately after receiving the handover command, in conditional handover, the base station can send a handover command containing one or more handover candidate cells and their corresponding handover execution conditions to the UE in advance before the actual handover conditions are met. After receiving the conditional handover command, the UE does not perform the handover immediately, but saves the received handover command configuration and starts monitoring the link quality of the source cell or the link quality of the target cell according to the handover execution conditions carried in the handover command message to evaluate whether the handover execution conditions are met. Only when it is monitored that the configured handover execution conditions are met, the UE starts to execute the saved handover command and access the corresponding target cell. Therefore, conditional handover is also called conditional reconfiguration.

PSCell change process in NR system:

The change of PSCell can be initiated by MN or SN. MN or SN can initiate the change of PSCell based on the measurement results of source PSCell or neighboring cells reported by UE or the load of neighboring cells. In the process of PSCell change with MN participation (whether initiated by MN or SN), the cell change command packet for PSCell It is included in the RRC reconfiguration message of SRB1 and sent to the UE. The PSCell change command is an RRC reconfiguration message for the SCG. When sent to the UE via the MCG link, it is generally included in the mrdc-SecondaryCellGroupConfig information element or the nr-SecondaryCellGroupConfig information element and nested in 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 autonomously generate the RRC reconfiguration message of the PSCell change command and send it to the UE via SRB3 of the SCG link.

When a UE that receives a PSCell change command triggers a change to a target PSCell, it applies the configuration in the command to perform the PSCell change, including performing a random access process 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 (the random access process is successfully completed), the UE stops the timer T304; when T304 times out, the UE considers that the PSCell change has failed or the synchronization reconfiguration has failed.

Similarly, NR systems in version 16 and later also support conditional PSCell changes, which is conditional reconfiguration of PSCell, called Conditional PSCell Change (CPC) or Conditional PSCell Addition/Change (CPAC).

Wireless link failure reporting:

In the NR system, the UE will generate and save a radio link failure report (RLF Report) when a radio link failure (RLF) or a handover failure (HOF) occurs, and save the radio link failure information in the UE variable VarRLF-Report. In general, the UE only saves the RLF report of the most recent connection failure (RLF or HOF), that is, when a connection failure occurs, the UE will clear the last saved RLF report, and then save the failure information corresponding to the most recent connection failure in the variable VarRLF-Report. After restoring the connection with the network side (such as through the RRC re-establishment process or the RRC establishment process for establishing a new connection), the UE can inform the network side through an RRC message that there is an available radio link failure report (such as indicated by the rlf-InfoAvailable information element). After receiving the indication, the network side can send a radio link failure report through an RRC message (such as the rlf-ReportReq information element in the UE information request UEInformationRequest message). To indicate the request) to request the UE to report its saved radio link failure report. The UE will report the saved radio link failure report (rlf-Report information element in the UE information response UEInformationResponse message) to the network side in the response RRC 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 neighbor cell when the link failure occurs, location information, the primary cell identifier where the link failure occurs, the link failure type (RLF or HOF), the RLF reason, the time from the connection failure to the RLF report reporting (recorded as timeSinceFailure information element), the time from the last receipt of the handover command (handover initiation or handover execution) to the connection failure (recorded as timeConnFailure information element), the time between the next UE entering the RRC connection state after the connection failure and the failure of the re-establishment process (recorded as timeUntilReconnection information element), the RRC re-establishment cell identifier, etc. RLF and HOF are collectively referred to as connection failure.

Successful switch report:

The NR system of version 17 introduces a handover information report upon successful handover, namely a successful handover report (SHR). This is because, in the NR system, relying solely on the radio link failure RLF report in the existing mechanism to perform network optimization may make the data collection process lengthy, while the handover information report when the handover is successful enables the network side to obtain a sufficient number of samples in the mobility process more quickly. Secondly, even for a successful handover scenario, there is still room for further optimization of its mobility parameters. The content of the SHR may include one or more of the following: the source cell identifier of the handover; the target cell identifier of the handover; the measurement results of the source cell or target cell of the handover; the neighbor cell measurement results; an indication of the reason why the SHR is triggered (i.e., which trigger condition is met), etc. The handover success may be the successful sending of the RRC reconfiguration completion message for responding to the handover command RRC reconfiguration message to the target base station, or the successful completion of the random access process to the target base station by the MAC layer. The network side needs to configure the trigger condition related parameters of the successful handover report to the UE (such as the threshold values corresponding to T310, T312, and T304). Only when one or more of the configured trigger conditions are met (such as the operating value of T310 or T312 of the source cell exceeds the corresponding configured threshold value when the handover command is received, and the operating value of T304 exceeds the corresponding configured threshold value when the handover is successfully completed) The UE will record the switching information of the successful switching only when the trigger conditions related to the source cell, such as the T310 threshold value or the T312 threshold value, are configured to the UE by the source cell, and the trigger conditions related to the target cell, such as the T304 threshold value, are configured to the UE by the target cell. The UE can inform the network side through an RRC message that there is an available successful switching report (such as indicated by the successHO-InfoAvailable information element). After receiving the indication, the network side can request the UE to report its saved successful switching information report through an RRC message (such as the successHO-ReportReq indication in the UE information request UEInformationRequest message). The UE will report the saved radio link failure report (successHO-Report in the UE information response UEInformationResponse message) to the network side in the response RRC message. This process is called the UE information process. The successful switching report saved on the UE can be saved for up to 48 hours.

As mentioned above, the SHR mechanism for PCell switching is standardized in the NR system of version 17 to optimize the mobility robustness in the switching scenario. One of the research goals in version 18 is to introduce a successful PSCell change report (SPR) in the PSCell change scenario. By reporting the information of the successful PSCell change process to the network side, the network side can optimize and adjust the parameters of the PSCell change to improve the mobility robustness of the PSCell. Successful PSCell change report, successful PSCell change and addition report (Successful PSCell change & addition report), and PSCell report (Successful PSCell report) can be replaced and are all called SPR. In the present disclosure, it is assumed that the reporting process of SPR is similar to that of SHR, that is, if the UE that has successfully executed the PSCell change/addition process determines to generate an SPR, the UE saves the content of the generated SPR in the corresponding UE variable, and indicates to the network side through an RRC message that there is a saved SPR thereon; after receiving the request from the network side instructing it to report the SPR, the UE reports the saved SPR to the network side in the RRC message. Different from the switching scenario, in the PSCell change scenario, in addition to the participation of the source PSCell and the target PSCell, the MN may also participate in the process. Consider the following scenario: a UE configured with DC, whose current PCell is PCell 1 and PSCell is PSCell2, when the source MN1 decides to trigger the switch to the target MN2, MN2 determines that the switching command contains the synchronous reconfiguration of PCell3 and the synchronous reconfiguration of PSCell4, that is, the target The target base station MN2 determines that the target PCell for switching is PCell3 and that the PSCell needs to be changed to the target PSCell, namely PSCell4. This scenario is called a PSCell change accompanied by switching or a switching accompanied by a PSCell change. In this scenario, when the UE receives an RRC reconfiguration message for a cell change, it needs to perform a PCell change and a PSCell change at the same time. In the 3GPP specification, there is no mandatory restriction on the order in which the UE performs a random access procedure to the PCell and a random access procedure to the PSCell. Then there is a possibility that the UE's PSCell change is successful (the random access procedure to PSCell4 is successfully completed), but then the PCell change fails (such as the random access procedure to the PCell fails, resulting in a T304 timeout). At this time, whether the UE needs to perform the SPR determination process to generate the SPR, how to generate the SPR, or how the UE generates a radio link failure RLF report corresponding to the PCell failure becomes a problem of concern in this disclosure. In addition, in this scenario, there is also a possibility that the PCell switch is successful, but the PSCell change fails or is aborted. In this case, how to set the SHR information also becomes an issue of concern to the present disclosure.

The following embodiments provide solutions based on the above problems. If not otherwise specified, some concepts or definitions are common among the embodiments. Each embodiment is also applicable to the case of adding a PSCell, that is, the PSCell change can also be a PSCell addition. Each embodiment is also applicable to the case of conditional reconfiguration, such as CHO or CPC.

Example 1

This embodiment provides an information reporting method executed on a UE. Through the method described in this embodiment, the UE can determine whether to perform the SPR determination process based on whether the PSCell change is accompanied by a PCell change or whether it is accompanied by a failed PCell change. If the accompanying handover process fails, the UE may not perform the SPR determination process, thereby avoiding unnecessary SPR storage and reporting, saving UE energy consumption and air interface signaling overhead.

The following is a detailed description of the embodiment 1 of the present disclosure. Fig. 1 is a schematic flow chart showing the information reporting method in the embodiment 1 of the present disclosure. As shown in Fig. 1 , the information reporting method in the embodiment 1 of the present disclosure may include the following steps.

Step 101: Receive signaling including both PCell switching and PSCell change from the network side, and the UE applies the configuration corresponding to the signaling to perform synchronous reconfiguration of the PSCell and synchronization of the PCell. Step reconfiguration.

Step 102: When the PSCell change process is successfully completed, the UE determines whether the PSCell change process is accompanied by the switching of the primary cell PCell and whether the switching fails. If the switching process fails, the UE does not perform the SPR determination process; otherwise, if the switching process is successful, the UE performs the SPR determination process, and includes the corresponding SPR information in the SPR. Optionally, the SPR information may include one or more of the following:

The first information is used to indicate whether the PSCell change event associated with the SPR simultaneously executes a PCell switch. Optionally, when the PSCell change event is accompanied by/simultaneously executes a PCell switch, the first information is set to true.

The second information is used to indicate whether the PCell switching executed simultaneously with the PSCell change event associated with the SPR is successful or failed.

The third information is used to indicate the source PCell information and target PCell information corresponding to the PCell switch executed simultaneously with the PSCell change event associated with the SPR. Optionally, the PCell information is the cell identifier corresponding to the PCell. Alternatively, the PCell information also includes the measurement result of the PCell, that is, information used to characterize the downlink signal quality of the PCell. Optionally, the measurement result is the latest measurement result obtained by the UE before performing the synchronous reconfiguration of the PSCell when receiving the PSCell change command, or the measurement result when a switching failure occurs.

Optionally, the first information and the second information may be the same information element.

Optionally, the successful completion of a PSCell change process refers to the successful completion of the random access process triggered by the synchronous reconfiguration process of the PSCell/SCG, or the response message for responding to the PSCell change command, i.e., the RRC reconfiguration completion message including the synchronous reconfiguration of the SCG, has been sent.

Optionally, the determination process of performing SPR is similar to the determination process of performing SHR in Version 17, which means that the UE determines whether to save SPR information in the SPR variable and how to set the corresponding SPR information according to the trigger condition parameters in the SPR configuration. For example, the SPR configuration can be a T310 percentage threshold value for the PSCell, a T312 percentage threshold value for the PSCell, or a T304 percentage threshold value for the SCG. For example, when the UE receives a PSCell change command and the ratio of the running value of T310 of the source PSCell before performing synchronous reconfiguration of the PSCell to the configured value of T310 exceeds the configured threshold When the value is set, the UE determines to save the SPR information corresponding to the process, and sets t310-cause in the corresponding SPR cause field (spr-Cause) to true. Optionally, the UE performs the SPR determination process only when the SPR configuration is configured.

Whether the PSCell change process is accompanied by the switching of the primary cell PCell refers to whether the RRC message used to trigger the PSCell change contains both the synchronous reconfiguration for SCG and the synchronous reconfiguration for MCG reconfigurationWithSync information elements. If the RRC message used to trigger the PSCell change contains both the synchronous reconfiguration for SCG and the synchronous reconfiguration for MCG reconfigurationWithSync information elements, it is considered that the RRC message triggers the PSCell change and the PCell switching at the same time, that is, the PSCell change process is accompanied by the switching of PCell or the switching of PCell is accompanied by the PSCell change.

Example 2

This embodiment provides another information reporting method performed on the UE. Through the method described in this embodiment, the UE can determine to retain the SPR information stored in the SPR variable based on whether the PSCell change is accompanied by a PCell change or whether it is accompanied by a failed PCell change. If the accompanying handover process fails, the UE can delete the SPR information for this PSCell change stored in the SPR variable, thereby avoiding unnecessary SPR reporting and saving UE energy consumption and air interface signaling overhead.

The following is a detailed description of the embodiment 2 of the present disclosure. Fig. 2 is a schematic flow chart showing the information reporting method in the embodiment 2 of the present disclosure. As shown in Fig. 2, the information reporting method in the embodiment 2 of the present disclosure may include the following steps.

Step 201: receiving signaling including both PCell switching and PSCell change from the network side, and the UE applies the configuration corresponding to the signaling to perform synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell.

Step 202: When the PSCell change process is successfully completed, the UE performs an SPR determination process, and includes corresponding SPR information in the SPR variable. Optionally, the UE performs an SPR determination process, and the SPR information is saved when the UE determines that the PCell switching process saved by the PSCell is in progress (i.e., the T304 timer for the MCG is running or has not timed out).

Optionally, the determination process of performing SPR is similar to the determination process of performing SHR in version 17, which means that the UE determines whether to save SPR information in the SPR variable and how to set the corresponding SPR information according to the trigger condition parameters in the SPR configuration. For example, the SPR configuration can be a T310 percentage threshold for PSCell, a T312 percentage threshold for PSCell, or a T304 percentage threshold for SCG. For example, when the UE receives a PSCell change command and the ratio of the running value of T310 of the source PSCell before performing synchronous reconfiguration of the PSCell to the configuration value of T310 exceeds the configured threshold value, the UE determines to save the SPR information corresponding to the process and sets the t310-cause in the corresponding SPR cause field (spr-Cause) to true. Optionally, the UE performs the SPR determination process only when the SPR configuration is configured.

Step 203: The UE determines that the PCell switching process executed in step 201 fails, such as timer T304 for MCG times out. Then the UE determines that the SPR information in the SPR variable is associated with the PSCell change event accompanying the PCell switching process, and the UE deletes the SPR information stored in the SPR variable.

In this embodiment, when the UE performs PCell switching and PSCell change at the same time, because the PSCell change is successfully completed first, the UE triggers the recording of the SPR information corresponding to the PSCell change event in the SPR variable according to the SPR configuration. However, a PCell switching failure occurs later, so the UE determines that the PSCell change event is triggered together with the PCell switching. scenario, the UE deletes the saved SPR information corresponding to the PSCell change event.

Example 3

This embodiment provides another information reporting method performed on the UE. Through the method described in this embodiment, the UE can determine how to set the SPR information stored in the SPR variable based on whether the PSCell change is accompanied by a failed PCell change. If the accompanying switching process fails, then in addition to saving the information of the PSCell change in the SPR variable, the UE also includes the information related to the PCell switching in the SPR record and reports it to the network side. After receiving the SPR report, the network side can learn that although the PSCell change corresponding to the SPR report is successful, the accompanying/attached PCell switching has failed, thereby determining whether to use the SPR report for the corresponding PSCell mobility optimization process, and the weight applied to the corresponding PSCell mobility optimization.

The following is a detailed description of the third embodiment of the present disclosure. Fig. 3 is a schematic flow chart showing an information reporting method in the third embodiment of the present disclosure. As shown in Fig. 3, the information reporting method in the third embodiment of the present disclosure may include the following steps.

Step 301: receiving signaling including both PCell switching and PSCell change from the network side, and the UE applies the configuration corresponding to the signaling to perform synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell.

Step 302: When the PSCell change process is successfully completed, the UE performs an SPR determination process, and the SPR variable includes corresponding SPR information. Optionally, the UE performs the SPR determination process when the UE determines that the PCell switching accompanying the PSCell change is also successfully completed; or the UE performs the SPR determination process when the UE determines that the PCell switching accompanying the PSCell change fails.

The corresponding SPR information included in the SPR variable further includes one or more of the following information:

The second information is used to indicate that the PSCell change event associated with the SPR is executed simultaneously Whether the PCell switching has failed (or completed successfully). Optionally, when the PCell switching accompanied by/executed simultaneously with the PSCell change event has failed, the second information is set to true.

Example 4

This embodiment provides another information reporting method executed on the UE. In the method described in the embodiment, the UE can determine how to set the SPR information stored in the SPR variable based on whether the PSCell change is accompanied by a failed PCell change. This embodiment is similar to embodiment 3 and is another specific implementation method of embodiment 3.

The following is a detailed description of the fourth embodiment of the present disclosure. Fig. 4 is a schematic flow chart showing an information reporting method in the fourth embodiment of the present disclosure. As shown in Fig. 4, the information reporting method in the fourth embodiment of the present disclosure may include the following steps.

Step 401: receiving signaling including both PCell switching and PSCell change from the network side, and the UE applies the configuration corresponding to the signaling to perform synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell.

Step 402: When the PSCell change process is successfully completed, the UE performs an SPR determination process and saves corresponding SPR information in the SPR variable.

Step 403: The UE determines that the PCell switching process executed in step 401 fails and HOF occurs. For example, if the timer T304 for the MCG times out, the UE determines that the SPR information in the stored SPR variable is associated with the PSCell change event accompanying the PCell switching process. Then, the UE further includes one or more of the following information in the SPR variable:

The second information is used to indicate that the PSCell change event associated with the SPR is executed simultaneously Whether the PCell switching fails. Optionally, when the PCell switching accompanied by/executed simultaneously with the PSCell change event fails, the second information is set to true.

Example 5

This embodiment provides a method for reporting and recording PSCell change information executed on a UE. In a scenario where the UE simultaneously performs a PSCell change and a PCell switch, if the PSCell change succeeds but the PCell switch fails, the UE records the SPR information related to the PSCell change in the SPR variable.

The fifth embodiment of the present disclosure is described in detail below. Fig. 5 is a schematic flow chart showing an information reporting method in the fifth embodiment of the present disclosure. As shown in Fig. 5 , the information reporting method in the fifth embodiment of the present disclosure may include the following steps.

Step 501: receiving signaling including both PCell switching and PSCell change from the network side, and the UE applies the configuration corresponding to the signaling to perform synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell.

Step 502: When the PSCell change is successfully completed, the UE performs the SPR determination process. During the SPR determination process, if the PCell associated with step 501 fails, The corresponding SPR information is saved in the SPR variable. That is, when the PSCell change is successfully completed and the accompanying PCell switching fails, the UE saves the corresponding SPR information in the SPR variable.

Optionally, the SPR information includes one or more of the following:

The second information is used to indicate whether the PCell switching executed simultaneously with the PSCell change event associated with the SPR fails. Optionally, when the PCell switching accompanied by/executed simultaneously with the PSCell change event fails, the second information is set to true.

Whether the PSCell change process is accompanied by the switching of the primary cell PCell refers to whether the RRC message used to trigger the PSCell change contains both the synchronous reconfiguration for SCG and the synchronous reconfiguration for MCG reconfigurationWithSync information elements. If the RRC message used to trigger the PSCell change contains both the synchronous reconfiguration for SCG and the synchronous reconfiguration for MCG reconfigurationWithSync information elements, it is considered that the RRC message triggers the PSCell change and the PCell switching at the same time, that is, the PSCell change process is accompanied by the switching of the PCell or the switching of the PCell is accompanied by the PSCell change.

That is, the PCell switching failure in step 502 becomes the triggering cause for the UE to perform the SPR determination process or save the SPR information corresponding to the PSCell change process in the SPR determination process. Therefore, optionally, the saving of the corresponding SPR information also includes setting the SPR cause field (such as identified as spr-Cause) in the SPR to PCell switching failure, which means that the PCell switching failure occurring simultaneously with the PSCell change process is the triggering cause of the SPR.

Optionally, before step 501 or step 502, step 500 is further included, the UE receives the incoming The SPR configuration from the network side includes a configuration information indicating whether the UE generates an SPR when a PSCell change is successfully completed and a PCell handover performed simultaneously fails. Optionally, the configuration is configured by the target PSCell or the target PCell.

Example 6

This embodiment provides a method for reporting PSCell change information executed on a UE. Through the method described in this embodiment, the UE can report relevant information to the base station in the SPR to provide more accurate PSCell change information to the network side. This embodiment provides a method for the signaling process when the UE reports the SPR described in the above embodiment through the RRC process.

FIG6 is a schematic flow chart showing an information reporting method in Embodiment 6 of the present disclosure. As shown in FIG6 , the information reporting method in Embodiment 6 of the present disclosure may include the following steps.

Step 601: The UE receives a UEInformationRequest message from the network side, which carries an indication/request for requesting the UE to report a stored SPR.

Step 602: The UE includes the content in the stored SPR in a UEInformationResponse message, and sends the UEInformationResponse message to the network side. The SPR report included in the UEInformationResponse message includes at least the first to third information in the above-mentioned embodiment.

Optionally, in the above-mentioned embodiments 1 to 6, the SPR information in the SPR report includes at least one or more of the following: source PSCell cell identifier or related downlink measurement results, target PSCell cell identifier or related downlink measurement results, SPR cause (i.e., the cause of triggering SPR), neighbor cell identifier or downlink measurement results.

Example 7

This embodiment provides a method for reporting and recording PSCell change information executed on a UE. In a scenario where the UE simultaneously performs a PSCell change and a PCell switch, if the PSCell change is successful and the PCell switch is also successful, the UE records the SPR information related to the PSCell change in the SPR variable.

Step 701: Receive information from the network side that includes both PCell switching and PSCell change. The UE applies the configuration corresponding to the signaling to perform synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell.

Step 702: When the PSCell change process is successful, the UE performs an SPR determination process. In this process, the UE determines whether the accompanying PCell switching in step 701 is successfully completed. If so, that is, the accompanying PCell switching is successfully completed, then the corresponding SPR information is saved in the SPR variable. This step can also be described as if the PSCell change in step 701 is successfully completed and the accompanying PCell switching is also successful, the UE saves the corresponding SPR information in the SPR determination process.

Optionally, the SPR information includes one or more of the following:

The second information is used to indicate whether the PCell switching executed simultaneously with the PSCell change event associated with the SPR is successful.

That is, the successful switching of the PCell in step 702 means that the UE performs the SPR determination process or saves the SPR information corresponding to the PSCell change process during the SPR determination process. Therefore, optionally, the storing of the corresponding SPR information further includes setting the SPR cause field (such as identified as spr-Cause) in the SPR to PCell switching success, which means that the PCell switching success occurring simultaneously with the PSCell change process is the triggering cause of the SPR.

Optionally, before step 701 or step 702, step 700 is also included, in which the UE receives an SPR configuration from the network side, which includes a configuration information indicating whether the UE generates an SPR when a PSCell change is successfully completed and a PCell switch is successfully executed at the same time. Optionally, the configuration is configured by the target PSCell or the target PCell.

Example 8

This embodiment proposes a method for reporting PSCell change information implemented on the UE. In a scenario where the UE performs PCell switching and PSCell change at the same time, if the PSCell change fails or is stopped, and the PCell switching is successful or the PCell switching fails, the UE includes the status information of the PSCell change in the PCell switching success report SHR or the PCell switching failure report (RLF report). This allows the network side to be informed of the execution status of the PSCell change accompanying the PCell switching, thereby providing a basis for optimizing the PSCell mobility in this scenario.

Step 801: receiving signaling including both PCell switching and PSCell change from the network side, and the UE applies the configuration corresponding to the signaling to perform synchronous reconfiguration of the PSCell and synchronous reconfiguration of the PCell.

Step 802a: When the PCell switching is successfully completed, the UE performs the SHR determination process and saves the SHR information in the SHR. The SHR information includes the PSCell change related information performed in step 1. The PSCell change related information may be one or more of the following information:

The fourth information includes source PSCell information or target PSCell information in the PSCell change process. The PSCell information includes a cell identifier of the PSCell or a measurement result of the PSCell.

The fifth information is used to indicate the completion status of the PSCell change process, such as whether the PSCell change is successful, or whether the PSCell change fails, or the reason for the PSCell change failure, or whether the PSCell Aborted/stopped, or the reason why the PSCell was stopped.

Step 802b: When the PCell switching fails, the UE saves the PCell switching failure related information in the RLF report variable. The PCell switching failure related information includes the PSCell change related information executed in step 801. The PSCell change related information may be one or more of the fourth or fifth information in the above step 802a.

Example 9

This embodiment illustrates the user equipment UE of the present disclosure. FIG. 7 is a block diagram of the user equipment UE involved in the present invention. As shown in FIG. 7 , the user equipment UE 70 includes a processor 701 and a memory 702. The processor 701 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 702 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memories, etc. Program instructions are stored on the memory 702. When the instructions are executed by the processor 701, various methods such as the above-mentioned mobile information reporting method described in detail in the present invention may be executed.

The method of the present invention and the equipment involved have been described above in conjunction with the preferred embodiments. It will be appreciated by those skilled in the art that the method shown above is exemplary only. The method of the present invention is not limited to the steps and sequence shown above. The base station and user equipment shown above may include more modules, for example, modules that can be developed or developed in the future and can be used for base stations, MMEs, or UEs, etc. The various identifiers shown above are exemplary only and not restrictive, and the present invention is not limited to the specific information elements that are examples of these identifiers. Those skilled in the art may make many changes and modifications based on the teachings of the illustrated embodiments.

The program running on the device according to the present disclosure may be a program that enables a computer to implement the functions of the embodiments of the present disclosure by controlling a central processing unit (CPU). The program or information processed by the program may be temporarily stored in a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory systems.

The program for realizing the functions of each embodiment of the present disclosure may be recorded in a computer readable recording medium. The corresponding functions can be realized by making the computer system read the programs recorded on the recording medium and execute these programs. The so-called "computer system" here can be a computer system embedded in the device, which can 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 recording medium for short-term dynamic storage of programs, or any other recording medium readable by a computer.

The various features or functional modules of the devices used in the above embodiments can be implemented or executed by circuits (e.g., single-chip or multi-chip integrated circuits). Circuits designed to perform the functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine. The above circuits may be digital circuits or analog circuits. In the case where new integrated circuit technologies have emerged to replace existing integrated circuits due to advances in semiconductor technology, one or more embodiments of the present disclosure may also be implemented using these new integrated circuit technologies.

In addition, the present disclosure is not limited to the above-mentioned embodiments. Although various examples of the embodiments have been described, the present 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.

As mentioned above, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. However, the specific structure is not limited to the above embodiments, and the present disclosure also includes any design changes that do not deviate from the main purpose of the present disclosure. In addition, various changes can be made to the present disclosure within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. In addition, the components with the same effect described in the above embodiments can be replaced by each other.

Claims

An information reporting method, comprising:

After the dual-connected user equipment UE successfully completes the primary and secondary cell (PSCell) change process, the UE determines whether the primary cell (PCell) switching accompanying the PSCell change process fails;

In the case where it is determined that the primary cell PCell switching accompanying the PSCell change process fails, the successful PSCell change report SPR includes at least one of the following information:

First information used to indicate that a PSCell change event simultaneously executes a PCell switch;

Second information used to indicate that a PCell switch executed simultaneously with a PSCell change event has failed;

The third information is used to indicate the source PCell information or the target PCell information corresponding to the PCell switching executed simultaneously with the PSCell change event.
The information reporting method according to claim 1, wherein:

The UE performs an SPR determination process when the PSCell is changed successfully, and includes SPR information in the SPR.
The information reporting method according to claim 1 or 2, wherein:

The successful completion of the PSCell change is the successful completion of a random access process to the target PSCell triggered by the PSCell change.
The information reporting method according to claim 1, wherein:

The UE performs an SPR determination process when the timer T304 for the MCG expires, and includes the SPR information in the SPR.
The information reporting method according to claim 1, wherein:

When the RRC message for triggering the PSCell change includes both the synchronization reconfiguration information element for the SCG and the synchronization reconfiguration information element for the MCG, the UE determines that the PSCell change process is accompanied by the PCell switching.
The information reporting method according to claim 1, wherein:

The PCell information includes a cell identifier corresponding to the PCell or a measurement result of the PCell.
The information reporting method according to claims 1 to 4, wherein:

Before the UE performs the PSCell change, an SPR configuration is received from the network side, the SPR configuration includes configuration parameters for triggering the SPR, and the SPR determination process is performed based on the SPR configuration.
The information reporting method according to claim 7, wherein:

The configuration information indicates whether the UE generates an SPR when a PSCell change is successfully completed and a PCell handover performed simultaneously fails.
The information reporting method according to claim 1, wherein:

When the UE receives a UE information request UEInformationRequest message from the network side, and the UEInformationRequest message carries an indication/request for requesting the UE to report the saved SPR, the UE includes the content of the saved SPR in a UE information response UEInformationResponse message and sends it to the network side.
A user equipment, comprising:

Processor; and

A memory, wherein instructions are stored in the memory;

Wherein, when the instructions are executed by the processor, the user equipment executes the information reporting method according to any one of claims 1-9.