Serving cell switching method, storage medium and electronic device

Abstract

The embodiment of the invention provides a serving cell switching method, a storage medium and an electronic device. The method comprises the following steps: storing proprietary configuration information of candidate serving cells from a base station through a terminal; and the terminal switches the serving cell according to the proprietary configuration information and the L2 indication message from the base station. According to the invention, the problems of mobile switching time delay of the service cell and flow falling and influence on user perception caused by the mobile switching time delay in the related technology are solved, and the effects of keeping the terminal service and improving the user perception in the service small switching process are achieved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communications, and in particular, to a serving cell handover method, a storage medium, and an electronic device. Background Art

[0002] With the continuous evolution of mobile communication networks, the deployment of network cell sites shows a trend of increasing density, and the resulting interference problems have become increasingly prominent. The service performance of users in the cell overlapping coverage area is greatly degraded due to the interference from neighboring cells, or the signal quality of neighboring cells is better. How to improve the user performance in the network overlapping coverage has introduced the concept of mobility handover. In 5G New Radio (5G NR), during the existing network mobile handover process, radio resource control (RRC) reconfiguration is performed according to the measurement results and enters a fuzzy period to wait for the signaling to complete. The mobile handover delay of the serving cell and the resulting traffic drop affect the user perception. Summary of the Invention

[0003] The embodiments of the present invention provide a serving cell handover method, a storage medium, and an electronic device, so as to at least solve the problem in the related art that the mobile handover delay of the serving cell and the resulting traffic drop affect the user perception.

[0004] According to an embodiment of the present invention, a serving cell handover method is provided, including: a terminal stores the proprietary configuration information of a candidate serving cell from a base station; the terminal performs a handover of the serving cell according to the proprietary configuration information and an L2 indication message from the base station.

[0005] According to another embodiment of the present invention, a serving cell handover method is provided, including: a base station sends an L2 indication message to a terminal storing the proprietary configuration information of a candidate serving cell, so that the terminal performs a handover of the serving cell according to the proprietary configuration information and the L2 indication message.

[0006] According to still another embodiment of the present invention, a computer-readable storage medium is further provided, and a computer program is stored in the computer-readable storage medium, wherein the computer program is configured to execute the steps in any one of the above method embodiments when running.

[0007] According to still another embodiment of the present invention, an electronic device is further provided, including a memory and a processor, a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0008] Through the present invention, a method for switching serving cells is provided, in which a terminal stores proprietary configuration information of candidate serving cells from a base station; and the terminal performs a serving cell handover according to the proprietary configuration information and an L2 indication message from the base station. This solves the problems of mobile handover delay of serving cells and the resulting traffic drop in related technologies, which affect the user experience, and achieves the effect of maintaining the terminal service and improving the user experience during the serving cell handover process. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 FIG. is a hardware structure block diagram of a mobile terminal for a method for switching serving cells according to an embodiment of the present invention;

[0010] Figure 2 FIG. is a flowchart of a method for switching serving cells according to an embodiment of the present invention;

[0011] Figure 3 Flowchart of a method for switching serving cells according to an embodiment of the present invention;

[0012] Figure 4 FIG. is a schematic diagram of a serving cell handover process principle according to an embodiment of the present invention scenario. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] The embodiments of the present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0014] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0015] The method embodiments provided in the embodiments of the present application can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 FIG. is a hardware structure block diagram of a mobile terminal for a method for switching serving cells according to an embodiment of the present invention. As Figure 1 shown, the mobile terminal may include one or more ( Figure 1 only one is shown in Figure 1 FIG.) processors 102 (the processors 102 may include, but are not limited to, processing devices such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Among them, the above-mentioned mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those of ordinary skill in the art can understand that Figure 1 the structure shown in Figure 1 FIG. is only schematic and does not limit the structure of the above-mentioned mobile terminal. For example, the mobile terminal may further include more or fewer components than those shown in

[0016] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the serving cell handover method in the embodiments of the present invention. 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 memories, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely disposed relative to the processor 102, and these remote memories can be connected to the mobile terminal through a network. Examples of the above-mentioned network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0017] The transmission device 106 is used to receive or send data via a network. Specific examples of the above-mentioned network may include a wireless network provided by a communication provider of the mobile terminal. In one instance, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices through a base station and thus communicate with the Internet. In one instance, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0018] In this embodiment, a method for serving cell handover running on the above-mentioned mobile terminal is provided. Figure 2 It is a flowchart of the serving cell handover method according to the embodiments of the present invention, as Figure 2 shown, and the process includes the following steps:

[0019] Step S202, the terminal stores the proprietary configuration information of the candidate serving cell from the base station;

[0020] In an exemplary embodiment, before the terminal stores the proprietary configuration information of the candidate serving cell from the base station, it further includes: the terminal receives the relevant configuration information of the candidate serving cell from the base station, where the relevant configuration information includes the common configuration information of multiple candidate serving cells and the proprietary configuration information of each candidate serving cell.

[0021] In the actual implementation process, in the Radio Resource Control (RRC) reconfiguration message, a new common field signaling under a non-cell node, i.e., the above-mentioned common configuration information, can be applied to multiple cells, which can save the number of RRC configuration air interface signaling and the size of RRC signaling. And a dedicated configuration information is added to the RRC reconfiguration message 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.

[0022] In an exemplary embodiment, the terminal receives relevant configuration information of a candidate serving cell from the base station, including: the terminal receives a Radio Resource Control (RRC) reconfiguration message from the base station, where the relevant configuration information is carried in the RRC reconfiguration message.

[0023] In an exemplary embodiment, the common configuration information at least includes one of the following: cell group configuration information; radio bearer configuration information; the dedicated configuration information at least includes one of the following: multicast / broadcast service radio bearer identifier; target cell identifier of the Local Traffic Manager (LTM); cell group configuration information incremental information.

[0024] Step S204, the terminal performs a handover of the serving cell according to the dedicated configuration information and the L2 indication message from the base station.

[0025] In an exemplary embodiment, the type of the L2 indication message at least includes one of the following: Media Access Control - Control Element (MAC CE); Downlink Control Information (DCI).

[0026] In an exemplary embodiment, before the terminal performs a handover of the serving cell according to the dedicated configuration information and the L2 indication message from the base station, it further includes: the terminal performs L1 measurement on the candidate serving cell according to the identification information of the candidate serving cell in the dedicated 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, where the L2 indication message is determined by the base station according to the lower layer measurement report.

[0027] In the actual implementation process, under the premise of sending the RRC reconfiguration message, L1 measurement needs to be performed.

[0028] In the actual implementation process, the L2 indication message is determined by the base station according to the underlying measurement report. The base station makes a judgment based on the neighbor cell measurement value reference signal received power in the underlying measurement report, and selects the neighbor cell of the handover carrier according to the optimal carrier quality to obtain the L2 indication message. If the gNB decides to perform a cell handover to the target cell, it triggers the cell handover by passing the candidate configuration index including the target cell through the MAC CE.

[0029] In an exemplary embodiment, before the terminal performs L1 measurement on the candidate serving cell, it further includes: the terminal performs downlink synchronization with the candidate serving cell.

[0030] In the actual implementation process, before the UE receives the cell handover command, it performs downlink or uplink synchronization with the target serving cell. By synchronizing with the candidate cell in advance by the UE, there is no need to perform subsequent random access procedures.

[0031] In an exemplary embodiment, the L2 indication message carries the early time advance (TA) of the target serving cell.

[0032] In the actual implementation process, the UE can obtain the TA before receiving the handover instruction, that is, the L2 indication message. However, in the embodiment of the present invention, in order to minimize the data interruption of the source cell to the candidate cell caused by channel feedback and reporting (CFRA), the UE does not receive the random access response Random (Access Response, RAR) for obtaining the TA value, and the TA value of the candidate cell is indicated in the cell handover command.

[0033] In an exemplary embodiment, the terminal performs a handover of 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 complete message to the target serving cell to implement the handover to the target serving cell.

[0034] In an exemplary embodiment, the terminal performs a handover of the serving cell according to the proprietary configuration information and the L2 indication message from the base station, and further includes: in the case where the terminal does not have a valid TA value of the target serving cell, the terminal initiates a random access (Random Access, RA) to the target serving cell to implement the handover to the target serving cell.

[0035] In the actual implementation process, if the UE does not have a valid TA of the target cell, it performs a random access process on the target cell. When the random access process is successfully completed, the UE considers that the LTM is successfully completed.

[0036] An embodiment of the present invention also provides a method for serving cell handover. Figure 3 According to the flowchart of the serving cell handover method of the embodiment of the present invention, as Figure 3 shown, the process includes the following steps:

[0037] Step S302, the base station sends an L2 indication message to the terminal storing the dedicated configuration information of the candidate serving cell, so that the terminal performs serving cell handover according to the dedicated configuration information and the L2 indication message.

[0038] In an exemplary embodiment, before the base station sends an L2 indication message to the terminal storing the dedicated configuration information of the candidate serving cell, it 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.

[0039] In an exemplary embodiment, before the base station sends an L2 indication message to the terminal storing the dedicated configuration information of the candidate serving cell, it further includes: the base station receives a physical layer measurement report obtained by the terminal for performing L1 measurement on 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 physical layer measurement report.

[0040] In an exemplary embodiment, the L2 indication message carries the timing advance (TA) value of the target serving cell.

[0041] Through the above steps, a method for serving cell handover is provided. The terminal stores the dedicated configuration information of the candidate serving cell from the base station; the terminal performs serving cell handover according to the dedicated configuration information and the L2 indication message from the base station. The problem of the mobile handover delay of the serving cell and the resulting traffic drop in the related art, which affects the user experience, is solved, and the effect of maintaining the terminal service and improving the user experience during the serving cell handover process is achieved.

[0042] Among them, the execution subject of the above steps may be a base station, a terminal, etc., but is not limited thereto.

[0043] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0044] In this embodiment, a serving cell handover device is further provided. This device is used to implement the above embodiments and preferred implementation manners, and those that have been described will not be repeated. As used hereinafter, the term "module" can be a combination of software and / or hardware that can achieve 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.

[0045] The serving cell handover device provided by the embodiments of the present invention can be set in a terminal, and includes a receiving and storing module and a handover module. Among them, the receiving and storing module is used to receive and store the dedicated configuration information of the candidate serving cell from the base station. The handover module is used to perform the handover of the serving cell according to the dedicated configuration information and the L2 indication message from the base station.

[0046] It should be noted that the above-mentioned various modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above-mentioned modules are all located in the same processor; or, the above-mentioned various modules are respectively located in different processors in any combination form. In the actual implementation process, the above-mentioned serving cell handover device can also be set in the terminal, and the naming method and function division of the above-mentioned various modules can be determined according to the actual situation, and no specific limitation is made here.

[0047] The embodiments of the present invention also provide a computer-readable storage medium, in which a computer program is stored. Among them, the computer program is set to execute the steps in any one of the above method embodiments when running.

[0048] In an exemplary embodiment, the above-mentioned computer-readable storage medium may include, but is not limited to: USB flash drive, read-only memory (ROM), random access memory (RAM), mobile hard disk, magnetic disk, or optical disk and other various media that can store computer programs.

[0049] An embodiment of the present invention further provides an electronic device, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0050] In an exemplary embodiment, the above electronic device may further include a transmission device and an input / output device. The transmission device is connected to the above processor, and the input / output device is connected to the above processor.

[0051] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary embodiments, and details are not described herein again.

[0052] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. They can be implemented by program codes executable by the computing device, so that 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 executed in a different order than here, or they can be separately fabricated into individual integrated circuit modules, or multiple modules or steps among them can be fabricated into a single integrated circuit module to implement. Thus, the present invention is not limited to any specific combination of hardware and software.

[0053] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following will be described in combination with specific scenario embodiments.

[0054] Scenario Embodiment 1

[0055] Figure 4 is a schematic diagram of the service cell handover process according to the scenario embodiment of the present invention. As Figure 4 shown, it includes the following steps:

[0056] Step S401, the user equipment UE sends a Measurement Report message to the base station gNB; the gNB decides to configure LTM and initiates the preparation of candidate cells.

[0057] Step S402, the gNB sends an RRC Reconfiguration message to the UE, and the message contains the LTM candidate cell configuration of one or more candidate cells.

[0058] In the embodiment of the present invention, relevant configuration information is added to the above RRC reconfiguration message. The relevant configuration information includes the common configuration information of multiple candidate serving cells and the proprietary configuration information of each candidate serving cell.

[0059] Common configuration information:

[0060] In the Local Traffic Manager candidate configuration (LTM candidate config) specifically corresponding to the RRC reconfiguration message, a common field signaling under non-cell nodes is newly added. It can be applied to multiple cells, saving the number of RRC configuration air interface signaling times and reducing the RRC signaling size. Among them, in the embodiment of the present invention, the common field signaling may include: a Measurement Gap Configuration field, applicable to NG-RAN / NE-DC / MN, used to represent the gap difference between FR1 and FR2, indicating the required gap type, etc. The LTM-L1 Measurement Configuration-r18 field corresponding to the measurement configuration version 18 in the Long Term Evolution (LTE) network is used to configure the measurement parameters and settings standards in the LTE network.

[0061] In the embodiment of the present invention, the common field signaling may further include: a UE Multicast MRB Required to Be Released List field, used to record the 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 identifiers, priorities, etc. By maintaining this list, it can ensure the timely release of unnecessary UEMulticast MRBs, thereby saving network resources and improving system efficiency.

[0062] The UE Multicast MRB Required to Be Released Item IEs field is used to indicate the user equipment multicast multimedia broadcast and multicast service radio bearer must release item information elements. These information elements may include multicast session identifiers, multicast group identifiers, multicast service identifiers, etc., used to indicate the information related to the multicast MRBs that the UE needs to release.

[0063] Proprietary configuration information:

[0064] Each candidate cell configuration can be provided as an incremental configuration on top of a baseline configuration, which 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 the RRC reconfiguration may include: Multicast / Broadcast Service Radio Bearer ID (MRB ID); Local Traffic Management (LTM) Target Cell ID; Cell Group Configuration delta.

[0065] Step S403: The UE saves the LTM candidate cell configuration and sends an RRC Reconfiguration Complete message to the gNB.

[0066] In the embodiment of the present invention, when the UE saves the LTM candidate cell configuration, it saves the relevant configuration information newly added in the RRC reconfiguration message, and both the common configuration information and the dedicated configuration information need to be saved.

[0067] Step S404: Before the UE receives the cell handover command, it synchronizes with the candidate cell in the downlink or uplink.

[0068] In the actual implementation process, through step S404, the UE synchronizes with the candidate cell in advance, so steps S407 and S408 do not need to be performed. Among them, the candidate cell is the target serving cell.

[0069] In addition, in step S404, the UE can also perform early Timing Advance (TA) acquisition for the candidate cell requested by the network before receiving the cell handover command. It can be completed through the CFRA triggered by the PDCCH order of the source cell, and then the UE sends a preamble to the indicated candidate cell. To minimize the data interruption of the source cell to the candidate cell caused by the CFRA, the UE does not receive the Random Access Response (RAR) for obtaining the TA value, and the TA value of the candidate cell is indicated in the cell handover command, that is, the L2 indication message. The UE does not maintain the TA timer of the candidate cell and relies on the network implementation to ensure the validity of the TA.

[0070] In the actual implementation process, the UE can perform TA acquisition before receiving the handover instruction, that is, the L2 indication message. However, in the embodiment of the present invention, to minimize the data interruption of the source cell to the candidate cell caused by the CFRA, the UE does not receive the RAR for obtaining the TA value, and the TA value of the candidate cell is indicated in the cell handover command.

[0071] Step S405: The UE performs L1 measurements on the configured candidate cells and sends a low-layer measurement report to the gNB.

[0072] In the actual implementation process, on the premise of sending the RRC reconfiguration message in step S402, L1 measurements need to be performed.

[0073] Step S406: For the neighbor cell measurement value Reference Signal Receiving Power (RSRP) reported by the UE, the base station gNB makes a judgment and selects the neighbor cell for handover carrier according to the optimal carrier quality. If the gNB decides to perform a cell handover to the target cell, it triggers the cell handover by passing the candidate configuration index including the target cell through the MAC-CE. The UE switches to the target cell and applies the configuration indicated by the candidate configuration index.

[0074] In the actual implementation process, the base station extracts the key measurement value Reference Signal Receiving Power (RSRP) from the reported same-frequency or different-frequency measurement report of the UE and selects the handover target carrier according to the optimal carrier quality. In the actual implementation process, the handover selection of the target serving cell or the target carrier can also be performed through other information in the measurement report, which will not be elaborated here.

[0075] Step S407: If the UE does not have a valid TA for the target cell, it performs a random access procedure on the target cell.

[0076] 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 performed the random access (RA) procedure in step S407, when the random access procedure is successfully completed, the UE considers that the LTM is successfully completed. For the LTM of the Random Access Channel (RAC), when the UE determines that the network has successfully received its first uplink unrelated data, the UE considers that the LTM is successfully completed.

[0077] In summary, the embodiments of the present invention provide a serving cell handover method. By pre-configuring the relevant configuration information between neighboring cells within a synchronization cluster on the system side or by the base station for the terminal, during the movement of the UE within the cluster, only the L2 indication MAC CE / DCI is dynamically used to activate the handover. At the same time, the relevant configuration information includes common 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 extracts the key measured value, the reference signal received power (RSRP), from the reported co-frequency or cross-frequency measurement report of the UE for judgment, and selects the handover target carrier according to the optimal carrier quality. During the movement of the UE, in 5G mobility, when the handover condition is met, the serving cell handover can be performed without RRC signaling, only through the L2 indication message, without the need for RRC re-configuration each time, thus overall reducing the signaling overhead.

[0078] The serving cell handover method provided by the embodiments of the present invention is mainly applied to the networking scenario of 5G NR, in the handover scenario between two co-frequency or cross-frequency cell overlapping areas, and a non-RRC signaling handover method is adopted for the UE to achieve the effect of improving the terminal handover delay and reducing the handover time.

[0079] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention shall be included in the protection scope of the present invention.

Claims

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

2. The method according to claim 1, characterized in that, Before the terminal stores the proprietary configuration information of candidate serving cells from the base station, the method further includes: The terminal receives the relevant configuration information of candidate serving cells from the base station, where 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, where the relevant configuration information is carried in the RRC reconfiguration message.

4. The method according to claim 2, wherein 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 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, characterized in that, Before the terminal performs handover of serving cells 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 cells according to the identification information of the candidate serving cells in the proprietary configuration information to obtain a physical layer measurement report; The terminal sends the physical layer measurement report to the base station; The terminal receives the L2 indication message from the base station, where the L2 indication message is determined by the base station according to the physical layer measurement report.

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

8. The method according to claim 1, characterized in that Wherein, The L2 indication message carries the Timing Advance (TA) value of the target serving cell.

9. The method according to claim 8, wherein The terminal performing handover of serving cells 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 achieve handover to the target serving cell.

10. The method according to claim 1, wherein The terminal performing handover of serving cells 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 achieve handover to the target serving cell.

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

12. The method according to claim 11, wherein Before the base station sends an L2 indication message to a terminal storing the dedicated configuration information of a 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 an L2 indication message to a terminal storing the dedicated configuration information of a candidate serving cell, the method further includes: The base station receives a layer 1 measurement report obtained by the terminal from performing L1 measurements on 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 Wherein, The L2 indication message carries a timing advance (TA) value of a target serving cell.

15. A computer-readable storage medium, characterized in that, A computer program is stored in the computer-readable storage medium, where the computer program, when executed by a processor, implements the method described in any one of claims 1 to 14.

16. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method described in any one of claims 1 to 14.

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