Serving cell handover method, storage medium, and electronic apparatus

Abstract

Provided in the embodiments of the present disclosure are a serving cell handover method, a storage medium, and an electronic apparatus. The method comprises: a terminal storing dedicated configuration information of a candidate serving cell from a base station; and the terminal performing a serving cell handover on the basis of the dedicated configuration information and an L2 indication message from the base station.

Description

Serving cell switching method, storage medium and electronic device

[0001] Cross-references to related publications

[0002] This disclosure is based on Chinese Patent Publication No. 2023118256702, filed on December 26, 2023, entitled “Service Cell Switching Method, Storage Medium and Electronic Device”, and claims the priority of the patent disclosure, all of which are incorporated into this disclosure by reference. Technical Field

[0003] The embodiments of the present disclosure relate to the field of communications, and in particular, to a serving cell switching method, a storage medium, and an electronic device. Background Art

[0004] With the continuous evolution of mobile communication networks, network cell sites are being deployed more densely, and the resulting interference problem is becoming increasingly prominent. Users in overlapping cell coverage areas experience significantly reduced service performance due to interference from neighboring cells, or the signal quality of neighboring cells is better. In order to provide users with better performance in overlapping network coverage, the concept of mobility switching is introduced. In the 5G New Radio (5G NR), during the mobile switching process of the existing network, Radio Resource Control (RRC) is reconfigured based on measurement results and enters an ambiguous period to wait for signaling to complete. The mobile switching delay of the serving cell and the resulting traffic drop affect user perception. Summary of the Invention

[0005] Embodiments of the present disclosure provide a serving cell switching method, a storage medium, and an electronic device.

[0006] According to one embodiment of the present disclosure, a serving cell switching method is provided, including: a terminal storing dedicated configuration information of candidate serving cells from a base station; and the terminal switching the serving cell according to the dedicated configuration information and an L2 indication message from the base station.

[0007] According to another embodiment of the present disclosure, a serving cell switching method is provided, including: a base station sends an L2 indication message to a terminal storing dedicated configuration information of a candidate serving cell, so that the terminal switches the serving cell according to the dedicated configuration information and the L2 indication message.

[0008] According to another embodiment of the present disclosure, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is configured to execute the steps of any one of the above method embodiments when running.

[0009] According to another embodiment of the present disclosure, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to perform the steps in any one of the above method embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a hardware structure block diagram of a mobile terminal of a serving cell switching method according to an embodiment of the present disclosure;

[0011] FIG2 is a flow chart of a serving cell switching method according to an embodiment of the present disclosure;

[0012] FIG3 is a flowchart of a serving cell switching method according to an embodiment of the present disclosure;

[0013] FIG4 is a schematic diagram of a serving cell switching process according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0014] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings and in conjunction with embodiments.

[0015] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0016] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking operation on a mobile terminal as an example, FIG1 is a hardware structure block diagram of a mobile terminal of a service cell switching method according to an embodiment of the present disclosure. As shown in FIG1 , the mobile terminal may include one or more (only one is shown in FIG1 ) processors 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 configured to store data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 configured to have a communication function. It will be understood by those skilled in the art that the structure shown in FIG1 is for illustration only and does not limit the structure of the mobile terminal. For example, the mobile terminal may also include more or fewer components than those shown in FIG1 , or have a configuration different from that shown in FIG1 .

[0017] The memory 104 can be configured to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the serving cell switching method in the embodiment of the present disclosure. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implements the above-mentioned method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include a memory remotely located relative to the processor 102, and these remote memories may be connected to the mobile terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0018] The transmission device 106 is configured to receive or transmit data via a network. A specific example of the aforementioned network may include a wireless network provided by the mobile terminal's telecommunications provider. In one embodiment, the transmission device 106 includes a network interface controller (NIC) that can be connected to other network devices via a base station to enable communication with the Internet. In another embodiment, the transmission device 106 may be a radio frequency (RF) module configured to communicate with the Internet wirelessly.

[0019] In this embodiment, a method for switching a serving cell running on the mobile terminal is provided. FIG2 is a flow chart of the method for switching a serving cell according to an embodiment of the present disclosure. As shown in FIG2 , the flow chart includes the following steps:

[0020] Step S202: The terminal stores the dedicated configuration information of the candidate serving cell from the base station;

[0021] In an exemplary embodiment, before the terminal stores the dedicated configuration information of the candidate service cells from the base station, it also includes: the terminal receives relevant configuration information of the candidate service cells from the base station, wherein the relevant configuration information includes common configuration information of multiple candidate service cells and dedicated configuration information of each candidate service cell.

[0022] In actual implementation, the RRC reconfiguration message includes new common field signaling for non-cell nodes, namely the common configuration information mentioned above. This can be applied to multiple cells, reducing the number of RRC configuration air interface signaling transactions and reducing the size of RRC signaling. Dedicated configuration information is also added to the RRC reconfiguration message to form a complete candidate cell configuration. The UE can manage incremental configurations independently and stores them as separate configurations.

[0023] In an exemplary embodiment, the terminal receives relevant configuration information of a candidate serving cell from a base station, including: the terminal receives a radio resource control RRC reconfiguration message from the base station, wherein the RRC reconfiguration message carries relevant configuration information.

[0024] In an exemplary embodiment, the public configuration information includes at least one of the following: cell group configuration information; wireless bearer configuration information; the proprietary configuration information includes at least one of the following: multicast / broadcast service wireless bearer identifier; local traffic manager (LTM) target cell identifier; cell group configuration information incremental information.

[0025] Step S204: The terminal switches the serving cell according to the dedicated configuration information and the L2 indication message from the base station.

[0026] In an exemplary embodiment, the type of the L2 indication message includes at least one of the following: Media Access Control-Control Element (MAC CE); Downlink Control Information (DCI).

[0027] In an exemplary embodiment, before the terminal switches the serving cell according to the proprietary configuration information and the L2 indication message from the base station, the method further includes: the terminal performs L1 measurement on the candidate serving cell according to the identification information of the candidate serving cell in the proprietary configuration information to obtain a bottom layer measurement report; the terminal sends the bottom layer measurement report to the base station; and the terminal receives the L2 indication message from the base station, wherein the L2 indication message is determined by the base station based on the bottom layer measurement report.

[0028] In actual implementation, L1 measurement needs to be performed before sending the RRC reconfiguration message.

[0029] In actual implementation, the L2 indication message is determined by the base station based on the underlying measurement report. The base station uses the neighboring cell measurement value reference signal received power in the underlying measurement report to determine the neighboring cell to switch carriers based on the best carrier quality, thus obtaining the L2 indication message. If the gNB decides to perform a cell handover to the target cell, it transmits a MAC CE containing the candidate configuration index of the target cell to trigger the cell handover.

[0030] In an exemplary embodiment, before the terminal performs L1 measurement on the candidate serving cell, the method further includes: the terminal performs downlink synchronization with the candidate serving cell.

[0031] In actual implementation, the UE performs downlink or uplink synchronization with the target serving cell before receiving the cell handover command. By synchronizing the UE with the candidate cell in advance, there is no need to perform a subsequent random access process.

[0032] In an exemplary embodiment, the L2 indication message carries an early timing advance (TA) of the target serving cell.

[0033] In actual implementation, the UE may obtain the TA before receiving the handover instruction, i.e., the L2 indication message. However, in the embodiment of the present disclosure, in order to minimize the data interruption of the source cell to the candidate cell due to the channel feedback and reporting (CFRA), the UE does not receive the random access response (RAR) set to obtain the TA value, and the TA value of the candidate cell is indicated in the cell handover command.

[0034] In an exemplary embodiment, the terminal switches the serving cell according to the proprietary configuration information and the L2 indication message from the base station, including: the terminal determines the target serving cell according to the L2 indication message and the proprietary configuration information; the terminal sends an RRC reconfiguration completion message to the target serving cell to achieve switching to the target serving cell.

[0035] In an exemplary embodiment, the terminal switches the service cell according to the proprietary configuration information and the L2 indication message from the base station, and also includes: when the terminal does not have a valid TA value of the target service cell, the terminal initiates random access (RA) to the target service cell to achieve switching to the target service cell.

[0036] In actual implementation, if the UE does not have a valid TA for the target cell, it performs a random access procedure on the target cell. When the random access procedure is successfully completed, the UE considers that the LTM execution is successfully completed.

[0037] The present disclosure also provides a serving cell switching method. FIG3 is a flow chart of the serving cell switching method according to the present disclosure. As shown in FIG3 , the flow chart includes the following steps:

[0038] In step S302, the base station sends an L2 indication message to the terminal having stored therein the dedicated configuration information of the candidate serving cell, so that the terminal switches the serving cell according to the dedicated configuration information and the L2 indication message.

[0039] In an exemplary embodiment, before the base station sends an L2 indication message to a terminal that stores the dedicated configuration information of a candidate service cell, it also includes: the base station sends a radio resource control RRC reconfiguration message to the terminal, wherein the RRC reconfiguration message carries the common configuration information of multiple candidate service cells and the dedicated configuration information of each candidate service cell.

[0040] In an exemplary embodiment, before the base station sends an L2 indication message to a terminal that stores dedicated configuration information of a candidate service cell, the method further includes: the base station receives a bottom layer measurement report obtained by performing L1 measurement on the candidate service cell from the terminal; and the base station obtains the L2 indication message based on the reference signal received power RSRP of the candidate service cell in the bottom layer measurement report.

[0041] In an exemplary embodiment, the L2 indication message carries a timing advance TA value of the target serving cell.

[0042] Through the above steps, a serving cell switching method is provided. The terminal stores proprietary configuration information of candidate serving cells from a base station. The terminal then switches the serving cell based on the proprietary configuration information and an L2 indication message from the base station. This method addresses the related art issues of serving cell mobility handover delays and the resulting traffic drops, which impact user experience. It achieves the goal of maintaining terminal services and improving user experience during minor service handovers.

[0043] The execution entity of the above steps may be a base station, a terminal, etc., but is not limited thereto.

[0044] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus the necessary general hardware platform, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), including a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present disclosure.

[0045] This embodiment also provides a serving cell switching device, which is configured to implement the above-mentioned embodiments and preferred implementations. Details already described will not be repeated. As used below, the term "module" may refer to a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

[0046] The serving cell switching apparatus provided in the embodiments of the present disclosure can be provided in a terminal and includes a receiving and storing module and a switching module. The receiving and storing module is configured to receive and store proprietary configuration information of candidate serving cells from a base station. The switching module is configured to switch the serving cell based on the proprietary configuration information and an L2 indication message from the base station.

[0047] It should be noted that each of the above modules can be implemented through software or hardware. For the latter, implementation can be achieved through the following methods, but is not limited to: all of the above modules are located in the same processor; or, the above modules are located in different processors in any combination. In actual implementation, the above-mentioned serving cell switching device can also be provided in the terminal. The corresponding naming method and functional division of the above-mentioned modules can be determined according to actual circumstances and are not specifically limited here.

[0048] An embodiment of the present disclosure further provides a computer-readable storage medium, in which a computer program is stored. The computer program is configured to execute the steps of any one of the above method embodiments when run.

[0049] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk.

[0050] An embodiment of the present disclosure further provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0051] In an exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0052] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail here.

[0053] Obviously, those skilled in the art should understand that the modules or steps of the present disclosure described above can be implemented using a general-purpose computing device, they can be concentrated on a single computing device, or distributed across a network composed of multiple computing devices, they can be implemented using program code executable by the computing device, and thus, they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be performed in a different order than herein, or they can be fabricated into separate integrated circuit modules, or multiple modules or steps can be fabricated into a single integrated circuit module for implementation. Thus, the present disclosure is not limited to any particular combination of hardware and software.

[0054] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, they are described below in conjunction with specific scenario embodiments.

[0055] Scenario Example 1

[0056] FIG4 is a schematic diagram of a serving cell handover process according to an embodiment of the present disclosure, as shown in FIG4 , including the following steps:

[0057] In step S401, the user terminal UE sends a Measurement Report message to the base station gNB; the gNB decides to configure LTM and initiates candidate cell preparation.

[0058] In step S402, the gNB sends an RRC reconfiguration message to the UE, which includes the LTM candidate cell configuration of one or more candidate cells.

[0059] In the embodiment of the present disclosure, relevant configuration information is newly added to the above RRC reconfiguration message, and the relevant configuration information includes common configuration information of multiple candidate serving cells and specific configuration information of each candidate serving cell.

[0060] Public configuration information:

[0061] In the Local Traffic Manager candidate configuration (LTM candidate config) specifically corresponding to the RRC reconfiguration message, new common field signaling for non-cell nodes is added. This can be applied to multiple cells, saving the number of RRC configuration air interface signaling times and reducing the size of RRC signaling. In the disclosed embodiments, the common field signaling may include: a Measurement Gap Configuration field (applicable to NG-RAN / NE-DC / MN), which is used to indicate the gap difference between FR1 and FR2 and the required gap type. The LTM-L1 Measurement Configuration-r18 field, corresponding to Measurement Configuration Release 18 in Long Term Evolution (LTE), is used to configure measurement parameters and setting standards in the LTE network.

[0062] In the disclosed embodiments, the common field signaling may also include a UE Multicast MRB Required to Be Released List field, which is used to record a list of UE Multicast Radio Bearers (MRBs) that need to be released. This list contains detailed information about the UE Multicast MRBs that need to be released, such as their identifiers and priorities. Maintaining this list ensures that no longer needed UE Multicast MRBs are released in a timely manner, thereby conserving network resources and improving system efficiency.

[0063] The UE Multicast MRB Required to Be Released Item IEs field is used to indicate to the user equipment that the multicast multimedia broadcast and multicast service radio bearers must release item information elements. These information elements may include the multicast session identifier, multicast group identifier, multicast service identifier, etc., which are used to indicate the multicast MRB related information that the UE needs to release.

[0064] Proprietary configuration information:

[0065] Each candidate cell configuration can be provided as an incremental configuration on top of the baseline configuration, and the incremental configuration is used to form a complete candidate cell configuration. The UE can manage the incremental configuration separately, and the UE stores the incremental configuration as a separate configuration. The signaling fields differentiated by cell ID in RRC reconfiguration can include: Multicast / Broadcast Service Radio Bearer ID (MRB ID); Local Traffic Management LTM Target Cell ID (LTM Target Cell ID); Cell Group Configuration information delta information (Cell Group Configuration delta).

[0066] In step S403, the UE saves the LTM candidate cell configuration and sends an RRC Reconfiguration Complete message to the gNB.

[0067] In the embodiment of the present disclosure, the UE saves the LTM candidate cell configuration, that is, saves the newly added related configuration information of the RRC reconfiguration message, and both the public configuration information and the proprietary configuration information need to be saved.

[0068] Step S404: Before receiving the cell switching command, the UE performs downlink or uplink synchronization with the candidate cell.

[0069] In actual implementation, the UE synchronizes with the candidate cell in advance through step S404, and there is no need to perform steps S407 and S408. The candidate cell is the target serving cell.

[0070] Additionally, in step S404, the UE may also perform early timing advance (TA) acquisition for the candidate cells requested by the network before receiving the cell handover command. This can be accomplished via a CFRA sequentially triggered by the source cell's PDCCH, after which the UE sends a preamble to the indicated candidate cells. To minimize data interruption from the source cell to the candidate cells due to CFRA, the UE does not receive a RAR configured to acquire the TA value. The TA value of the candidate cell is indicated in the cell handover command, i.e., the L2 indication message. The UE does not maintain a TA timer for the candidate cells and relies on network implementation to ensure TA validity.

[0071] In actual implementation, the UE may execute TA acquisition before receiving the switching instruction, i.e., the L2 indication message. However, in the embodiment of the present disclosure, in order to minimize the data interruption of the source cell to the candidate cell due to CFRA, the UE does not receive the RAR set to obtain the TA value, and the TA value of the candidate cell is indicated in the cell switching command.

[0072] In step S405, the UE performs L1 measurement on the configured candidate cell and sends a bottom-layer measurement report to the gNB.

[0073] In actual implementation, L1 measurement needs to be performed before the RRC reconfiguration message is sent in step S402.

[0074] In step S406, the gNB evaluates the Reference Signal Received Power (RSRP) measured by the UE and selects the neighboring cell to which the carrier to switch based on the best carrier quality. If the gNB decides to perform a cell handover to the target cell, it transmits a MAC-CE triggering the cell handover, including the candidate configuration index of the target cell. The UE switches to the target cell and applies the configuration indicated by the candidate configuration index.

[0075] In actual implementation, the base station extracts the key measurement value, Reference Signal Received Power (RSRP), from the intra-frequency or inter-frequency measurement reports reported by the UE and selects the target carrier for handover based on the optimal carrier quality. In actual implementation, other information in the measurement report can also be used to select the target serving cell or target carrier for handover, which will not be detailed here.

[0076] Step S407: If the UE does not have a valid TA for the target cell, a random access procedure is performed on the target cell.

[0077] In step S408, the UE completes the LTM cell handover process by sending an RRC reconfiguration complete message to the target cell. If the UE has already performed the random access (RA) process in step S407, the UE considers the LTM process to have successfully completed upon successful completion of the RA process. For LTM on the Random Access Channel (RAC), the UE considers the LTM process to have successfully completed upon determining that the network has successfully received its first uplink-unrelated data.

[0078] In summary, the disclosed embodiments provide a service cell switching method, which synchronizes the relevant configuration information between neighboring areas within the cluster for the terminal in advance on the system side or by the base station. During the movement of the UE within the cluster, the switching activation is only dynamically performed through the L2 indication MAC CE / DCI. At the same time, the relevant configuration information includes public configuration information and dedicated configuration information. After receiving the relevant configuration information, the UE can manage the cell reference configuration separately and store the reference configuration as a separate configuration. The base station makes a judgment by extracting the key measurement value reference signal received power RSRP from the same-frequency or different-frequency measurement report reported by the UE, and selects the switching target carrier according to the optimal carrier quality. During the movement of the UE, when the switching conditions are met in 5G mobility, there is no need for RRC signaling. The service cell can be switched only through the L2 indication message, and there is no need to reconfigure RRC every time, which reduces the signaling overhead as a whole.

[0079] The serving cell switching method provided in the embodiments of the present disclosure is mainly used in 5G NR networking scenarios. In the switching scenario where two same-frequency or different-frequency cells overlap, a non-RRC signaling switching method is adopted for the UE to achieve the effect of improving the terminal switching delay and reducing the switching time.

[0080] The foregoing description is merely a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Those skilled in the art will readily appreciate that various modifications and variations of the present disclosure are possible. Any modifications, equivalent substitutions, or improvements made within the principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A method for serving cell handover, comprising: The terminal stores the proprietary configuration information of candidate serving cells from the base station; The terminal performs serving cell handover according to the proprietary configuration information and the L2 indication message from the base station.

2. The method according to claim 1, wherein Before the terminal stores the proprietary configuration information of candidate serving cells from the base station, the method further comprises: The terminal receives the relevant configuration information of candidate serving cells from the base station, wherein the relevant configuration information includes the common configuration information of multiple candidate serving cells and the proprietary configuration information of each candidate serving cell.

3. The method according to claim 2, wherein, The terminal receiving the relevant configuration information of candidate serving cells from the base station includes: The terminal receives a Radio Resource Control (RRC) reconfiguration message from the base station, wherein the relevant configuration information is carried in the RRC reconfiguration message.

4. The method according to claim 2, wherein, The common configuration information includes at least one of the following: cell group configuration information; radio bearer configuration information; The proprietary configuration information includes at least one of the following: multicast / broadcast service radio bearer identifier; Local Traffic Management (LTM) target cell identifier; cell group configuration information increment information.

5. The method according to claim 1, wherein, The types of the L2 indication message include at least one of the following: Media Access Control Control Element (MAC CE); Downlink Control Information (DCI).

6. The method according to claim 1, wherein Before the terminal performs serving cell handover according to the proprietary configuration information and the L2 indication message from the base station, the method further comprises: The terminal performs L1 measurement on the candidate serving cells according to the identifier information of the candidate serving cells in the proprietary configuration information to obtain a lower layer measurement report; The terminal sends the lower layer measurement report to the base station; The terminal receives the L2 indication message from the base station, wherein the L2 indication message is determined by the base station according to the lower layer measurement report.

7. The method according to claim 1, wherein, Before the terminal performs L1 measurement on the candidate serving cells, the method further comprises: The terminal performs downlink synchronization with the candidate serving cells.

8. The method according to claim 1, wherein, The L2 indication message carries the Time Advance (TA) value of the target serving cell.

9. The method according to claim 8, wherein The terminal performing serving cell handover according to the proprietary configuration information and the L2 indication message from the base station includes: The terminal determines the target serving cell according to the L2 indication message and the proprietary configuration information; The terminal sends an RRC reconfiguration complete message to the target serving cell to implement handover to the target serving cell.

10. The method according to claim 1, wherein, The terminal performing serving cell handover according to the proprietary configuration information and the L2 indication message from the base station further includes: In the case that the terminal does not have a valid TA value of the target serving cell, the terminal initiates a Random Access (RA) to the target serving cell to implement handover to the target serving cell.

11. A method for serving cell handover, comprising: The base station sends an L2 indication message to a terminal storing the dedicated configuration information of a candidate serving cell, so that the terminal performs a handover of the serving cell according to the dedicated configuration information and the L2 indication message.

12. The method according to claim 11, wherein, Before the base station sends the L2 indication message to the terminal storing the dedicated configuration information of the candidate serving cell, the method further includes: The base station sends a Radio Resource Control (RRC) reconfiguration message to the terminal, where the RRC reconfiguration message carries the common configuration information of multiple candidate serving cells and the dedicated configuration information of each candidate serving cell.

13. The method according to claim 11, wherein, Before the base station sends the L2 indication message to the terminal storing the dedicated configuration information of the candidate serving cell, the method further includes: The base station receives a layer 1 measurement report obtained by the terminal through L1 measurement of the candidate serving cell; The base station obtains the L2 indication message according to the Reference Signal Received Power (RSRP) of the candidate serving cell in the layer 1 measurement report.

14. The method according to claim 13, wherein The L2 indication message carries a Time Advance (TA) value of the target serving cell.

15. A computer-readable storage medium storing a computer program therein, wherein, The computer program, when executed by a processor, implements the method described in any one of claims 1 to 14.

16. An electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method described in any one of claims 1 to 14.

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