Base station, information acquisition method and readable storage medium
By deploying a shared memory bank in the base station, the protocol stack module directly accesses and operates the MIB, the problem of low base station work efficiency is solved, and more efficient operation, maintenance and management and memory resource utilization is achieved.
Patent Information
- Application Number
- CN202410200378.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2025-08-26
AI Technical Summary
In the wireless communication system, the base station is less efficient due to the operation and maintenance module notifying the protocol stack module MIB information.
Deploy a shared memory library in the base station, so that the operation and maintenance modules and protocol stack modules share the management information library, allowing the protocol stack module to directly access and operate the MIB, and reduce interaction between modules.
By reducing the message queue load between modules, the work efficiency of the base station is improved, the operation, maintenance and management process is simplified, memory resources are saved, and the system's memory resource utilization rate and business interaction operation efficiency are improved.
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Figure CN120547597A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of wireless communication technology, and specifically relates to a base station, an information acquisition method, and a readable storage medium. Background Art
[0002] In related technologies, when performing operation and maintenance management (OMS) in a wireless communication system, a base station typically needs to send full configuration information stored in a management information base (MIB) to a protocol stack module (such as a high-level protocol stack) via an OMS module (such as an OAM module) in the baseband processing unit (BBU). This generates a large number of interactive messages between the OMS module and the protocol stack module, occupying message queues between the modules and resulting in low base station efficiency. Summary of the Invention
[0003] The purpose of the embodiments of the present application is to provide a base station, an information acquisition method and a readable storage medium to solve the problem of low base station working efficiency caused by the method of notifying the protocol stack module of information in the MIB through the operation and maintenance module in the related art.
[0004] In order to solve the above technical problems, this application is implemented as follows:
[0005] In a first aspect, a base station is provided, wherein an operation and maintenance module, a protocol stack module, and a shared memory library are deployed on the base station; wherein,
[0006] The shared memory library is used to establish a management information base and store the management information base, and the management information base is shared by the operation and maintenance module and the protocol stack module;
[0007] The protocol stack module is used to access the information in the management information base.
[0008] Optionally, the operation and maintenance module is configured to receive a command or request from a network management system, and update information in the management information base according to the command or request.
[0009] Optionally, the operation and maintenance module is used to: send a cell establishment request to the protocol stack module; the protocol stack module is used to: receive the cell establishment request sent by the operation and maintenance module, and obtain cell establishment-related configuration information from the management information base based on the cell establishment request.
[0010] Optionally, the operation and maintenance module is configured to: send an update request to the protocol stack module, wherein the update request carries an identifier of the update information;
[0011] The protocol stack module is used to receive the update request sent by the operation and maintenance module, and obtain the update information corresponding to the identifier from the management information base.
[0012] Optionally, the update request further carries an update type of the update information; and the protocol stack module is further configured to: perform corresponding operations according to the update information and the update type.
[0013] Optionally, the protocol stack module is configured to: receive indication information, the indication information being used to instruct to update the information in the management information base; and send notification information to the operation and maintenance module, the notification information being used to notify the information to be updated;
[0014] The operation and maintenance module is used to receive notification information sent by the protocol stack module and update the management information base according to the information to be updated.
[0015] In a second aspect, a method for obtaining information is provided. The method is applied to a base station, where an operation and maintenance module, a protocol stack module, and a shared memory library are deployed. The method includes:
[0016] Establishing a management information base in the shared memory library and storing the management information base; wherein the management information base is shared by the operation and maintenance module and the protocol stack module;
[0017] The information in the management information base is accessed through the protocol stack module.
[0018] Optionally, the method further includes:
[0019] Sending a cell establishment request from the operation and maintenance module to the protocol stack module;
[0020] The configuration information related to cell establishment is obtained from the management information base through the protocol stack module.
[0021] Optionally, the method further includes:
[0022] Sending an update request from the operation and maintenance module to the protocol stack module, wherein the update request carries an identifier of the update information;
[0023] The update information corresponding to the identifier is obtained from the management information base through the protocol stack module.
[0024] Optionally, the update request further carries an update type of the update information; the method may further include: performing corresponding operations through the protocol stack module according to the update information and the update type.
[0025] Optionally, the method further includes:
[0026] receiving, through the protocol stack module, indication information, where the indication information is used to instruct updating of information in the management information base;
[0027] Sending notification information from the protocol stack module to the operation and maintenance module, where the notification information is used to notify information that needs to be updated;
[0028] The management information base is updated according to the information to be updated through the operation and maintenance module.
[0029] In a third aspect, a base station is provided, comprising a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method described in the second aspect.
[0030] In a fourth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the second aspect are implemented.
[0031] In a fifth aspect, a computer program product is provided, comprising computer instructions, which, when executed by a processor, implement the steps of the method described in the second aspect.
[0032] Through the solution in the embodiment of the present application, the protocol stack module can directly access / operate the MIB on the base station side, so that the protocol stack module no longer needs to rely on interaction with the operation and maintenance module to obtain information in the MIB, effectively reducing the amount of interactive information between the operation and maintenance module and the protocol stack module, and reducing the load of the message queue between modules, thereby optimizing the operation and maintenance management process and improving the work efficiency of the base station. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 This is a schematic diagram of the structure of a base station provided in an embodiment of the present application;
[0034] Figure 2 is a schematic diagram of the information interaction process in an embodiment of the present application;
[0035] Figure 3 This is a flow chart of an information acquisition method provided by an embodiment of the present application;
[0036] Figure 4 This is a structural diagram of a base station provided in an embodiment of the present application. DETAILED DESCRIPTION
[0037] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of this application without making any creative efforts are within the scope of protection of this application.
[0038] In order to solve the problem of low base station working efficiency caused by the method of notifying the protocol stack module of information in the MIB through the operation and maintenance module in the related technology, the embodiment of the present application proposes to open the access permission of the base station side MIB to the protocol stack module (such as the high-level protocol stack), and the protocol stack module directly accesses / operates the base station side MIB through shared memory and interface, so that the protocol stack module no longer needs to rely on interaction with the operation and maintenance module to obtain information in the MIB, thereby reducing the load of the message queue between modules and improving the working efficiency of the base station.
[0039] The following, in conjunction with the accompanying drawings, describes in detail the base station, information acquisition method, and readable storage medium provided in the embodiments of the present application through specific embodiments and their application scenarios.
[0040] See Figure 1 , Figure 1 This is a schematic diagram of the structure of a base station provided in an embodiment of the present application. Figure 1 As shown, a base station 10 is deployed with an operation and maintenance module 11, a protocol stack module 12, and a shared memory library 13. The shared memory library 13 is used to establish and store a management information base (MIB), which is shared by the operation and maintenance module 11 and the protocol stack module 12. The protocol stack module 12 is used to access information in the management information base.
[0041] Optionally, the base station 10 includes a baseband processing unit (Building Baseband Unit, BBU), on which an operation and maintenance module 11, a protocol stack module 12, and a shared memory library 13 are deployed. Deploying the shared memory library 13 can be understood as allocating the shared memory library 13 on the BBU for establishing and storing a management information base MIB.
[0042] The operation and maintenance module 11 may be an OAM module, which is located at the platform layer.
[0043] The protocol stack module 12 is located at the service layer, such as Layer 3 (L3), and may be a control plane module of a higher-level protocol stack, such as the Radio Resource Control (RRC) layer, the Packet Data Convergence Protocol (PDCP) layer, the Medium Access Control (MAC) layer, etc. The protocol stack module 12 mainly reads information from the management information base when establishing a service and does not need to update the management information base.
[0044] For establishing and storing the management information base, the shared memory library 13 resources may be used to establish and store the management information base of the base station 10 in the shared memory library 13. The management information base may also be called a management information table, which contains configuration information of related hardware, services, etc.
[0045] The information in the management information base (MIB) shared between the operation and maintenance module 11 and the protocol stack module 12 can be understood as follows: the operation and maintenance module 11 can directly access and operate the MIB, and the protocol stack module 12 can also directly access and operate the MIB. To enable the protocol stack module 12 to directly access the MIB, an interface for accessing the MIB can be provided for the protocol stack module 12.
[0046] Through the solution in the embodiment of the present application, the protocol stack module can directly access / operate the MIB on the base station side, so that the protocol stack module no longer needs to rely on interaction with the operation and maintenance module to obtain information in the MIB, effectively reducing the amount of interactive information between the operation and maintenance module and the protocol stack module, and reducing the load of the message queue between modules, thereby optimizing the operation and maintenance management process and improving the work efficiency of the base station.
[0047] In addition, by directly accessing / operating the base station side MIB through the protocol stack module, the memory used to store data within the protocol stack can be effectively saved. It is no longer necessary to occupy the memory resources within the protocol stack to store all configuration information, thereby improving the utilization of memory resources and simplifying the forwarding and storage of configuration information within the protocol stack.
[0048] In addition, sharing information in the MIB with the operation and maintenance module and the protocol stack module helps to simplify the function expansion method. It can be applied to base station systems with complex business scenarios, a lot of configuration information, and a large network. It can also be applied to the operation and maintenance management process of small stations, and can improve the system memory resource utilization and system business interaction operation efficiency.
[0049] In the embodiment of this application, Figure 2As shown, the MIB can be updated by the operation and maintenance module 11. The operation and maintenance module 11 can be used to receive commands or requests from the network management system and update the information in the MIB based on the commands or requests. For example, the operation and maintenance module 11 is primarily responsible for receiving Man-Machine Language (MML) or Simple Network Management Protocol (SNMP) requests from the network management system, parsing them, updating the information in the MIB, and reading information from the MIB when configuration information is needed.
[0050] Optionally, the protocol stack module 12 in the embodiment of the present application can access / operate the management information base during the cell establishment process. Specifically, the operation and maintenance module 11 is used to: send a cell establishment request to the protocol stack module 12; the protocol stack module 12 is used to: receive the cell establishment request sent by the operation and maintenance module 11, and obtain the cell establishment-related configuration information from the management information base according to the cell establishment request. As a result, the operation and maintenance module 11 only needs to carry the necessary configuration information to notify the protocol stack module 12 during the necessary process of cell configuration, and there is no need to use a large number of configuration update messages to carry the full amount of MIB information for notification, thereby effectively reducing the message content and simplifying the inter-layer operation and maintenance management process.
[0051] For example, the operation process of the base station during the cell establishment process in this solution includes:
[0052] S1: When the base station starts, the main processor BBU allocates a shared memory library, creates and stores the management information base MIB in the shared memory library; the operation and maintenance module obtains MIB data from the base station configuration file or external commands and updates the management information base.
[0053] S2: After the external resources are ready, the operation and maintenance module notifies the upper layer protocol stack L3 through a request message to start establishing a Stream Control Transmission Protocol (SCTP) link.
[0054] S3: After the SCTP link is established, the operation and maintenance module notifies each layer of the protocol stack through a request message to start establishing a cell.
[0055] S4: Protocol stack modules (such as RRC and PDCP) obtain cell establishment-related broadcast and configuration data by reading the corresponding cell-level configuration table in the management information base. If the BBU is deployed as a centralized unit (CU) / distributed unit (DU), some protocol stack modules cannot read the MIB, so the CU module must read the relevant information in the MIB instead of the DU module.
[0056] S5: After each layer is established, the protocol stack module returns an establishment response to the operation and maintenance module, and continues to obtain terminal and resource information from the MIB to carry out subsequent services.
[0057] In the embodiment of this application, Figure 2 As shown, the operation and maintenance module 11 can dynamically send an update request to the protocol stack module 12, which no longer carries all the data information defined in the management information base, but carries the identifier of the updated part. The protocol stack module 12 reads the information in the management information base through the identifier and returns an update response to the operation and maintenance module 11.
[0058] Optionally, the operation and maintenance module 11 is configured to send an update request to the protocol stack module 12, the update request carrying an identifier of the update information; and the protocol stack module 12 is configured to receive the update request sent by the operation and maintenance module 11 and obtain the update information corresponding to the identifier from the management information base. Thus, when dynamic notification of MIB change information is required during base station service, only the identifier of the changed portion can be notified to the protocol stack module, thereby effectively reducing message content, simplifying the inter-layer operation and maintenance management process, and effectively improving the system's performance and stability during dynamic updates of base station configuration information.
[0059] Optionally, the update request may also carry an update type of the update information, such as adding configuration information, modifying configuration information, or deleting configuration information, etc. The protocol stack module 12 is further configured to perform corresponding operations according to the update information and the update type.
[0060] For example, when a cell is activated and the terminal service needs to be dynamically notified of MIB change information during operation, the operation and maintenance module can notify the protocol stack module of the change information identifier, and the protocol stack module reads the relevant configuration information in the MIB based on the identifier to manage the configuration update process. The specific processing process includes:
[0061] S1: After the cell activation is completed and the terminal service is in progress, the operation and maintenance module receives a parameter operation request from the network management system or the local maintenance terminal LMT, which is used to request to update the information in the management information base, including adding information, modifying information, deleting information, etc.
[0062] S2: The operation and maintenance module parses the received request, updates the information in the management information base, and sends a response to the network management system.
[0063] S3: The operation and maintenance module sends an update request to the protocol stack module, which carries the identifier and update type of the update information defined in the management information base.
[0064] S4: The protocol stack module obtains relevant information from the management information base based on the identifier, and performs the reconfiguration process of cell resources and terminal resources to complete the work of dynamically updating service parameters; and sends an update response to the operation and maintenance module.
[0065] S5: If the BBU is deployed with CU / DU separated, some protocol stack modules cannot read the MIB. Therefore, the CU module must be used instead of the DU module to read the relevant information in the MIB.
[0066] Optionally, the protocol stack module 12 can be configured to receive an indication message instructing an update of information in the management information base (MIB) and send a notification message to the operation and maintenance module 11, notifying the operation and maintenance module 11 of the information to be updated. The operation and maintenance module 11 can then receive the notification message from the protocol stack module 12 and update the MIB based on the information to be updated. In this way, the protocol stack module is solely responsible for acquiring MIB data, and the operation and maintenance module handles MIB updates, thereby preventing conflicts within the base station's internal processes.
[0067] For example, when the protocol stack module receives an indication message from the NG interface and the XN interface and needs to update the data in the management information base (such as maintaining slices, neighboring area information, etc.), it can notify the operation and maintenance module of the information that needs to be updated, and the operation and maintenance module will update the management information base and return a response to the protocol stack module.
[0068] See Figure 3 , Figure 3 is a flow chart of an information acquisition method provided in an embodiment of the present application, wherein the method is applied to a base station, on which an operation and maintenance module, a protocol stack module, and a shared memory library are deployed; Figure 3 As shown, the method includes the following steps:
[0069] Step 31: Establish a management information base in a shared memory library and store the management information base; the management information base is shared by the operation and maintenance module and the protocol stack module;
[0070] Step 32: Access the information in the management information base through the protocol stack module.
[0071] Optionally, the base station includes a baseband processing unit (BBU), on which an operation and maintenance module, a protocol stack module, and a shared memory library are deployed. Deploying the shared memory library can be understood as allocating a shared memory library on the BBU for establishing and storing a management information library.
[0072] For establishing and storing the management information base, resources of a shared memory library may be used to establish and store the base station's management information base in the shared memory library. The management information base may also be called a management information table, which contains configuration information of related hardware, services, etc.
[0073] The information in the management information base shared by the operation and maintenance module and the protocol stack module can be understood as follows: the operation and maintenance module can directly access and operate the management information base, and the protocol stack module can also directly access and operate the management information base. In order to enable the protocol stack module to directly access the management information base, an interface for accessing the management information base can be provided for the protocol stack module.
[0074] Through the solution in the embodiment of the present application, the protocol stack module can directly access / operate the MIB on the base station side, so that the protocol stack module no longer needs to rely on interaction with the operation and maintenance module to obtain information in the MIB, effectively reducing the amount of interactive information between the operation and maintenance module and the protocol stack module, and reducing the load of the message queue between modules, thereby optimizing the operation and maintenance management process and improving the work efficiency of the base station.
[0075] In addition, by directly accessing / operating the base station side MIB through the protocol stack module, the memory used to store data within the protocol stack can be effectively saved. It is no longer necessary to occupy the memory resources within the protocol stack to store all configuration information, thereby improving the utilization of memory resources and simplifying the forwarding and storage of configuration information within the protocol stack.
[0076] Optionally, the method may further include:
[0077] Sending a cell establishment request from the operation and maintenance module to the protocol stack module;
[0078] The protocol stack module obtains the configuration information related to cell establishment from the management information base.
[0079] Therefore, the operation and maintenance module only needs to carry the necessary configuration information to notify the protocol stack module during the necessary process of cell configuration, without having to use a large number of configuration update messages carrying the full amount of MIB information for notification, thereby effectively reducing the message content and simplifying the inter-layer operation and maintenance management process.
[0080] Optionally, the method may further include:
[0081] Sending an update request from the operation and maintenance module to the protocol stack module, wherein the update request carries an identifier of the update information;
[0082] The update information corresponding to the identifier is obtained from the management information base through the protocol stack module.
[0083] Therefore, during the base station business process, when it is necessary to dynamically notify MIB change information, only the identifier of the changed part can be notified to the protocol stack module, thereby effectively reducing the message content, simplifying the inter-layer operation and maintenance management process, and effectively improving the system's work quality and stability in dynamically updating configuration information.
[0084] Optionally, the update request also carries an update type of the update information; the method further includes: performing corresponding operations through a protocol stack module according to the update information and the update type.
[0085] Optionally, the method may further include:
[0086] receiving, through the protocol stack module, indication information for instructing updating of information in a management information base;
[0087] Sending notification information from the protocol stack module to the operation and maintenance module, wherein the notification information is used to notify the information that needs to be updated;
[0088] The management information base is updated according to the information to be updated through the operation and maintenance module.
[0089] In this way, the protocol stack module is only responsible for acquiring MIB data and placing MIB update operations in the operation and maintenance module, thereby preventing internal process conflicts within the base station. For example, when the protocol stack module receives an indication message from the NG interface and the XN interface indicating that it needs to update the data in the MIB (such as maintaining slices and neighboring cell information), it can notify the operation and maintenance module of the information that needs to be updated. The operation and maintenance module will then update the MIB and return a response to the protocol stack module.
[0090] Optional, such as Figure 4 As shown, an embodiment of the present application also provides a base station 40, including a processor 41, a memory 42, and a program or instruction stored in the memory 42 and executable on the processor 41. When the program or instruction is executed by the processor 41, each process of the above-mentioned information acquisition method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.
[0091] The present application also provides a computer program product including computer instructions, which can achieve the above-mentioned Figure 3 The various processes of the method embodiment shown can achieve the same technical effect, and to avoid repetition, they will not be described here.
[0092] An embodiment of the present application also provides a readable storage medium on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned information acquisition method embodiment can be implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.
[0093] Computer-readable media includes both permanent and non-permanent, removable and non-removable media, and can be implemented using any method or technology for information storage. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change RAM (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media, such as modulated data signals and carrier waves.
[0094] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.
[0095] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.
[0096] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course 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 application, 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), and includes a number of instructions for enabling a service classification device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.
[0097] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A base station, characterized in that: The base station is deployed with an operation and maintenance module, a protocol stack module and a shared memory library; wherein, The shared memory library is used to establish a management information base and store the management information base, and the management information base is shared by the operation and maintenance module and the protocol stack module; The protocol stack module is used to access the information in the management information base.
2. The base station according to claim 1, wherein The operation and maintenance module is used to receive a command or request from the network management system and update the information in the management information base according to the command or request.
3. The base station according to claim 1, wherein The operation and maintenance module is used to: send a cell establishment request to the protocol stack module; The protocol stack module is used to receive a cell establishment request sent by the operation and maintenance module, and obtain configuration information related to cell establishment from the management information base according to the cell establishment request.
4. The base station according to claim 1, wherein The operation and maintenance module is used to: send an update request to the protocol stack module, wherein the update request carries an identifier of the update information; The protocol stack module is used to receive the update request sent by the operation and maintenance module, and obtain the update information corresponding to the identifier from the management information base.
5. The base station according to claim 4, characterized in that The update request also carries the update type of the update information; The protocol stack module is further configured to: execute corresponding operations according to the update information and the update type. The base station according to claim 1 , wherein: The protocol stack module is used to: receive indication information, the indication information is used to instruct to update the information in the management information base; and send notification information to the operation and maintenance module, the notification information is used to notify the information to be updated; The operation and maintenance module is used to receive notification information sent by the protocol stack module and update the management information base according to the information to be updated.
7. An information acquisition method, characterized in that: The method is applied to a base station, on which an operation and maintenance module, a protocol stack module, and a shared memory library are deployed. The method includes: Establishing a management information base in the shared memory library and storing the management information base; wherein the management information base is shared by the operation and maintenance module and the protocol stack module; The information in the management information base is accessed through the protocol stack module.
8. The method according to claim 7, characterized in that The method further comprises: Sending a cell establishment request from the operation and maintenance module to the protocol stack module; The configuration information related to cell establishment is obtained from the management information base through the protocol stack module.
9. The method according to claim 7, characterized in that The method further comprises: Sending an update request from the operation and maintenance module to the protocol stack module, wherein the update request carries an identifier of the update information; The update information corresponding to the identifier is obtained from the management information base through the protocol stack module.
10. The method according to claim 9, characterized in that The update request also carries the update type of the update information; and the method further includes: According to the update information and the update type, corresponding operations are performed through the protocol stack module.
11. The method according to claim 7, characterized in that The method further comprises: receiving, through the protocol stack module, indication information, where the indication information is used to instruct updating of information in the management information base; Sending notification information from the protocol stack module to the operation and maintenance module, wherein the notification information is used to notify information that needs to be updated; The management information base is updated according to the information to be updated through the operation and maintenance module.
12. A base station, characterized in that: The method comprises a processor, a memory, and a program or instruction stored in the memory and executable on the processor, wherein the program or instruction, when executed by the processor, implements the steps of the method according to any one of claims 7 to 11.
13. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the steps of the method according to any one of claims 7 to 11 are implemented.
14. A computer program product, characterized in that The method comprises computer instructions, which, when executed by a processor, implement the steps of the method according to any one of claims 7 to 11.