A method, device and computer-readable storage medium for discovering MEC servers

Abstract

An embodiment of the present invention provides a method, device and computer-readable storage medium for discovering a multi-access edge computing (MEC) server. The method includes: an application server obtains an MEC server address and location-associated information; and sends the MEC server address and location-associated information to a terminal, so that the terminal establishes a connection with the MEC server.

Description

Technical Field

[0001] The present invention relates to the field of mobile communication technologies, and in particular to a method, device and computer-readable storage medium for discovering a multi-access edge computing (MEC) server. Background Art

[0002] In the MEC system architecture, some of the data sent by the terminal (such as local monitoring information, etc.) needs to be sent to the local network, and some of the data (such as external information query data, etc.) needs to be sent to the external network.

[0003] In the 5G research plan, a local domain name server (DNS) can be added to the local network. The terminal obtains the local DNS address in the 3GPP underlying communication process, sends an address request to the DNS, and the DNS returns the MEC server address. 5G is a newly deployed network, which can add network entities and modify the processes of terminals and networks in the underlying communication. However, for existing 4G and other networks, it is difficult to add network entities and modify the underlying processes, and the implementation is not flexible enough. Summary of the invention

[0004] In view of this, embodiments of the present invention are intended to provide a method, device, and computer-readable storage medium for discovering an MEC server.

[0005] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0006] An embodiment of the present invention provides a method for discovering a multi-access edge computing MEC server, which is applied to an application server and includes:

[0007] Get the MEC server address and location-related information;

[0008] The MEC server address and location-related information are sent to the terminal, so that the terminal can establish a connection with the MEC server.

[0009] The obtaining of the MEC server address and location-related information includes:

[0010] Receive the identifier and address of the MEC server and the location association information.

[0011] The obtaining of the MEC server address and location-related information includes:

[0012] Receive the identifier and address of the MEC server forwarded by the capability exposure platform, as well as the location association information.

[0013] The location-related information includes but is not limited to the following information:

[0014] The base station identifier connected to the MEC server and / or the location area identifier to which the base station belongs.

[0015] The sending of the MEC server address and location-related information to the terminal includes:

[0016] The MEC server address and location-related information are sent to the terminal.

[0017] An embodiment of the present invention also provides a method for discovering a multi-access edge computing MEC server, which is applied to a terminal and includes:

[0018] Receiving the MEC server address and location-related information; the MEC server address and location-related information are obtained and sent by the application server;

[0019] Establish a connection with the MEC server based on the MEC server address and location association information.

[0020] The receiving of the MEC server address and location-related information includes:

[0021] When registering, receive the MEC server address and location association information sent by the application server.

[0022] Optionally, after receiving the MEC server address and location association information, the method further includes:

[0023] Read cell broadcasts while moving;

[0024] When it is determined that the base station identifier in the broadcast message is the same as the base station identifier associated with the received MEC server, subsequent operations are performed.

[0025] An embodiment of the present invention also provides a method for discovering a multi-access edge computing MEC server, which is applied to the MEC server and includes:

[0026] Receiving location-related information sent by a base station;

[0027] Sending the address of the MEC server itself and the location association information;

[0028] Among them, the address of the MEC server and the location association information are used for the terminal to establish a connection with the MEC server.

[0029] Optionally, after receiving the location association information sent by the base station, the method further includes:

[0030] The address of the MEC server is sent to the base station for routing when the base station sends subsequent data.

[0031] The sending of the address of the MEC server itself and the location association information includes:

[0032] Sending the address of the MEC server itself and the location-related information to an application server; or,

[0033] The address of the MEC server itself and the location association information are sent to the application server via the capability exposure platform.

[0034] An embodiment of the present invention further provides a device for discovering a multi-access edge computing MEC server, which is applied to an application server and includes:

[0035] The acquisition module is used to obtain the MEC server address and location-related information;

[0036] The first sending module is used to send the MEC server address and location association information to the terminal, so that the terminal can establish a connection with the MEC server.

[0037] An embodiment of the present invention further provides a device for discovering a multi-access edge computing MEC server, which is applied to a terminal and includes:

[0038] A first receiving module is used to receive the MEC server address and location-related information; the MEC server address and location-related information are acquired and sent by the application server;

[0039] A connection module is used to establish a connection with the MEC server based on the MEC server address and location association information.

[0040] An embodiment of the present invention further provides a device for discovering a multi-access edge computing MEC server, which is applied to a MEC server and includes:

[0041] A second receiving module, used for receiving location-related information sent by the base station;

[0042] A second sending module is used to send the address of the MEC server itself and the location association information;

[0043] Among them, the address of the MEC server and the location association information are used for the terminal to establish a connection with the MEC server.

[0044] An embodiment of the present invention also provides a device for discovering a multi-access edge computing MEC server, the device comprising: a processor and a memory for storing a computer program that can be run on the processor,

[0045] Wherein, the processor is used to execute the steps of the above method when running the computer program.

[0046] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the above method are implemented.

[0047] The method, device and computer-readable storage medium for discovering an MEC server provided by an embodiment of the present invention, wherein an application server obtains an MEC server address and location-related information; and sends the MEC server address and location-related information to a terminal, so that the terminal can establish a connection with the MEC server.

[0048] The embodiments of the present invention can implement rapid MEC server deployment and discovery at the application layer and realize related functions of MEC without adding existing LTE or existing network entities and without changing the underlying communication process. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 The method flow diagram of discovering a MEC server according to an embodiment of the present invention is as follows Figure 1 ;

[0050] Figure 2 The method flow diagram of discovering a MEC server according to an embodiment of the present invention is as follows Figure 2 ;

[0051] Figure 3 The method flow diagram of discovering a MEC server according to an embodiment of the present invention is as follows Figure 3 ;

[0052] Figure 4 Schematic diagram of the device structure for discovering MEC server according to an embodiment of the present invention Figure 1 ;

[0053] Figure 5 Schematic diagram of the device structure for discovering MEC server according to an embodiment of the present invention Figure 2 ;

[0054] Figure 6 Schematic diagram of the device structure for discovering MEC server according to an embodiment of the present invention Figure 3 ;

[0055] Figure 7 This is a schematic diagram of the system structure described in the scenario embodiment of the present invention;

[0056] Figure 8 A flowchart of a method for discovering an MEC server according to an embodiment of the present invention. DETAILED DESCRIPTION

[0057] The present invention is described below in conjunction with the accompanying drawings and embodiments.

[0058] The embodiment of the present invention provides a method for discovering a multi-access edge computing MEC server, such as Figure 1 As shown, the method is applied to an application server, comprising:

[0059] Step 101: Obtain the MEC server address and location-related information;

[0060] Step 102: Send the MEC server address and location-related information to the terminal, so that the terminal can establish a connection with the MEC server.

[0061] In the embodiment of the present invention, the obtaining of the MEC server address and location-related information includes:

[0062] Receive the identifier and address of the MEC server and the location association information.

[0063] In the embodiment of the present invention, the obtaining of the MEC server address and location-related information includes:

[0064] Receive the identifier and address of the MEC server forwarded by the capability exposure platform, as well as the location association information.

[0065] In the embodiment of the present invention, the location-related information includes but is not limited to the following information:

[0066] The base station identifier connected to the MEC server and / or the location area identifier to which the base station belongs.

[0067] In the embodiment of the present invention, sending the MEC server address and location-related information to the terminal includes:

[0068] The MEC server address and location-related information are sent to the terminal.

[0069] The embodiment of the present invention also provides a method for discovering a multi-access edge computing MEC server, such as Figure 2 As shown, the method is applied to a terminal, comprising:

[0070] Step 201: Receive the MEC server address and location-related information; the MEC server address and location-related information are acquired and sent by the application server;

[0071] Step 202: Establish a connection with the MEC server based on the MEC server address and location association information.

[0072] In the embodiment of the present invention, the receiving of the MEC server address and location-related information includes:

[0073] When registering, receive the MEC server address and location association information sent by the application server.

[0074] In one embodiment of the present invention, after receiving the MEC server address and location association information, the method further includes:

[0075] Read cell broadcasts while moving;

[0076] When it is determined that the base station identifier in the broadcast message is the same as the base station identifier associated with the received MEC server, subsequent operations are performed.

[0077] The embodiment of the present invention also provides a method for discovering a multi-access edge computing MEC server, such as Figure 3 As shown, the method is applied to the MEC server, including:

[0078] Step 301: receiving location-related information sent by a base station;

[0079] Step 302: Send the address of the MEC server itself and the location association information;

[0080] Among them, the address of the MEC server and the location association information are used for the terminal to establish a connection with the MEC server.

[0081] In one embodiment of the present invention, after receiving the location association information sent by the base station, the method further includes:

[0082] The address of the MEC server is sent to the base station for routing when the base station sends subsequent data.

[0083] In the embodiment of the present invention, the sending of the address of the MEC server itself and the location association information includes:

[0084] Sending the address of the MEC server itself and the location-related information to an application server; or,

[0085] The address of the MEC server itself and the location association information are sent to the application server via the capability exposure platform.

[0086] In order to implement the above method embodiment, the embodiment of the present invention also provides a device for discovering a multi-access edge computing MEC server, such as Figure 4 As shown, the device is applied to an application server and includes:

[0087] Acquisition module 401, used to acquire the MEC server address and location-related information;

[0088] The first sending module 402 is used to send the MEC server address and location-related information to the terminal, so that the terminal can establish a connection with the MEC server.

[0089] In the embodiment of the present invention, the acquisition module 401 acquires the MEC server address and location-related information, including:

[0090] Receive the identifier and address of the MEC server and the location association information.

[0091] In the embodiment of the present invention, the acquisition module 401 acquires the MEC server address and location-related information, including:

[0092] Receive the identifier and address of the MEC server forwarded by the capability exposure platform, as well as the location association information.

[0093] In the embodiment of the present invention, the location-related information includes but is not limited to the following information:

[0094] The base station identifier connected to the MEC server and / or the location area identifier to which the base station belongs.

[0095] In the embodiment of the present invention, the first sending module 402 sends the MEC server address and location-related information to the terminal, including:

[0096] The MEC server address and location-related information are sent to the terminal.

[0097] The embodiment of the present invention also provides a device for discovering a multi-access edge computing MEC server, such as Figure 5 As shown, the device is applied to a terminal, comprising:

[0098] The first receiving module 501 is used to receive the MEC server address and location-related information; the MEC server address and location-related information are acquired and sent by the application server;

[0099] The connection module 502 is used to establish a connection with the MEC server based on the MEC server address and location association information.

[0100] In the embodiment of the present invention, the first receiving module 501 receives the MEC server address and location association information, including:

[0101] When registering, receive the MEC server address and location association information sent by the application server.

[0102] In one embodiment of the present invention, after the first receiving module 501 receives the MEC server address and location association information,

[0103] It is also used to read cell broadcasts when moving;

[0104] When it is determined that the base station identifier in the broadcast message is the same as the base station identifier associated with the received MEC server, subsequent operations are performed.

[0105] The embodiment of the present invention also provides a device for discovering a multi-access edge computing MEC server, such as Figure 6 As shown, the device is applied to a MEC server and includes:

[0106] The second receiving module 601 is used to receive location-related information sent by a base station;

[0107] The second sending module 602 is used to send the address of the MEC server itself and the location association information;

[0108] Among them, the address of the MEC server and the location association information are used for the terminal to establish a connection with the MEC server.

[0109] In one embodiment of the present invention, after the second receiving module 601 receives the location association information sent by the base station,

[0110] The second sending module 602 is further used to send the address of the MEC server to the base station for routing when the base station sends subsequent data.

[0111] In the embodiment of the present invention, the second sending module 602 sends the address of the MEC server itself and the location association information, including:

[0112] Sending the address of the MEC server itself and the location-related information to an application server; or,

[0113] The address of the MEC server itself and the location association information are sent to the application server via the capability exposure platform.

[0114] An embodiment of the present invention also provides a device for discovering a multi-access edge computing MEC server, the device comprising: a processor and a memory for storing a computer program that can be run on the processor,

[0115] Wherein, when the processor is used to run the computer program, it executes:

[0116] Get the MEC server address and location-related information;

[0117] The MEC server address and location-related information are sent to the terminal, so that the terminal can establish a connection with the MEC server.

[0118] When obtaining the MEC server address and location-related information, the processor is further configured to execute, when running the computer program:

[0119] Receive the identifier and address of the MEC server and the location association information.

[0120] When obtaining the MEC server address and location-related information, the processor is further configured to execute, when running the computer program:

[0121] Receive the identifier and address of the MEC server forwarded by the capability exposure platform, as well as the location association information.

[0122] The location-related information includes but is not limited to the following information:

[0123] The base station identifier connected to the MEC server and / or the location area identifier to which the base station belongs.

[0124] When the MEC server address and location-related information are sent to the terminal, the processor is further configured to execute, when running the computer program:

[0125] The MEC server address and location-related information are sent to the terminal.

[0126] An embodiment of the present invention also provides a device for discovering a multi-access edge computing MEC server, the device comprising: a processor and a memory for storing a computer program that can be run on the processor,

[0127] Wherein, when the processor is used to run the computer program, it executes:

[0128] Receiving the MEC server address and location-related information; the MEC server address and location-related information are obtained and sent by the application server;

[0129] Establish a connection with the MEC server based on the MEC server address and location association information.

[0130] When receiving the MEC server address and location-related information, the processor is further configured to execute, when running the computer program:

[0131] When registering, receive the MEC server address and location association information sent by the application server.

[0132] After receiving the MEC server address and location association information, the processor is further configured to execute, when running the computer program:

[0133] Read cell broadcasts while moving;

[0134] When it is determined that the base station identifier in the broadcast message is the same as the base station identifier associated with the received MEC server, subsequent operations are performed.

[0135] An embodiment of the present invention also provides a device for discovering a multi-access edge computing MEC server, the device comprising: a processor and a memory for storing a computer program that can be run on the processor,

[0136] Wherein, when the processor is used to run the computer program, it executes:

[0137] Receiving location-related information sent by a base station;

[0138] Sending the address of the MEC server itself and the location association information;

[0139] Among them, the address of the MEC server and the location association information are used for the terminal to establish a connection with the MEC server.

[0140] After receiving the location association information sent by the base station, the processor is further configured to execute, when running the computer program:

[0141] The address of the MEC server is sent to the base station for routing when the base station sends subsequent data.

[0142] When sending the address of the MEC server itself and the location association information, the processor is also used to execute:

[0143] Sending the address of the MEC server itself and the location-related information to an application server; or,

[0144] The address of the MEC server itself and the location association information are sent to the application server via the capability exposure platform.

[0145] It should be noted that: when the device provided in the above embodiment discovers the MEC server, only the division of the above program modules is used as an example. In practical applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the device provided in the above embodiment and the corresponding method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0146] In an exemplary embodiment, an embodiment of the present invention further provides a computer-readable storage medium, which may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disk, or CD-ROM; or may be various devices including one or any combination of the above memories, such as a mobile phone, a computer, a tablet device, a personal digital assistant, etc.

[0147] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the computer program performs:

[0148] Get the MEC server address and location-related information;

[0149] The MEC server address and location-related information are sent to the terminal, so that the terminal can establish a connection with the MEC server.

[0150] When obtaining the MEC server address and location-related information, the computer program, when executed by the processor, further executes:

[0151] Receive the identifier and address of the MEC server and the location association information.

[0152] When obtaining the MEC server address and location-related information, the computer program, when executed by the processor, further executes:

[0153] Receive the identifier and address of the MEC server forwarded by the capability exposure platform, as well as the location association information.

[0154] The location-related information includes but is not limited to the following information:

[0155] The base station identifier connected to the MEC server and / or the location area identifier to which the base station belongs.

[0156] When the MEC server address and location-related information are sent to the terminal, the computer program is executed by the processor and further executes:

[0157] The MEC server address and location-related information are sent to the terminal.

[0158] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the computer program performs:

[0159] Receiving the MEC server address and location-related information; the MEC server address and location-related information are obtained and sent by the application server;

[0160] Establish a connection with the MEC server based on the MEC server address and location association information.

[0161] When receiving the MEC server address and location-related information, the computer program is executed by the processor and further executes:

[0162] When registering, receive the MEC server address and location association information sent by the application server.

[0163] After receiving the MEC server address and location association information, the computer program is executed by the processor and further executes:

[0164] Read cell broadcasts while moving;

[0165] When it is determined that the base station identifier in the broadcast message is the same as the base station identifier associated with the received MEC server, subsequent operations are performed.

[0166] The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the computer program performs:

[0167] Receiving location-related information sent by a base station;

[0168] Sending the address of the MEC server itself and the location association information;

[0169] Among them, the address of the MEC server and the location association information are used for the terminal to establish a connection with the MEC server.

[0170] After receiving the location association information sent by the base station, the computer program is executed by the processor and further executes:

[0171] The address of the MEC server is sent to the base station for routing when the base station sends subsequent data.

[0172] When the address of the MEC server itself and the location-related information are sent, the computer program, when executed by the processor, further executes:

[0173] Sending the address of the MEC server itself and the location-related information to an application server; or,

[0174] The address of the MEC server itself and the location association information are sent to the application server via the capability exposure platform.

[0175] The present invention is described below in conjunction with scenario embodiments.

[0176] like Figure 7As shown, in this embodiment, by connecting the capability exposure platform with the MEC server, the application server obtains the edge computing server address and location association information through the capability exposure platform and sends it to the UE, so that the UE establishes a connection with the MEC server after moving to an area served by the MEC server.

[0177] Of course, in another embodiment of the present invention, the MEC server may directly interact with the application server regarding the address and location-related information of the MEC server itself, that is, a capability exposure platform may not be provided.

[0178] Figure 8 Based on Figure 7 The schematic diagram of the method flow of the system discovering the MEC server is shown in FIG. Figure 8 As shown, including:

[0179] Step 1: When the base station establishes a connection with the MEC server, the base station sends its identity and / or location area, such as the tracking area identity TAI, to the MEC server;

[0180] Step 2: The MEC server sends its address to the base station for routing when the base station sends subsequent data;

[0181] Step 3: The MEC server sends its own identification, its own address, the base station ID to which it is connected and / or the location area identification, such as the tracking area identification TAI, to the capability exposure platform;

[0182] Step 4: The capability exposure platform sends the MEC server identifier, MEC address, base station identifier (such as base station ID, cell ID, etc.) and / or the location area identifier, such as tracking area identifier TAI, to the server;

[0183] Step 5: When the UE registers, the MEC address and the base station identifier associated with it (such as base station ID, cell ID, etc.) and / or the location area identifier to which it belongs, such as the tracking area identifier TAI, are sent to the UE;

[0184] Step 6: The UE saves the received MEC server address and the identifier associated with it;

[0185] Step 7: When the UE moves, read the cell broadcast;

[0186] Step 8: When the UE reads the information (base station identifier) ​​in the received broadcast message and finds that it matches the base station identifier associated with the received MEC server, it performs subsequent actions, such as establishing a local connection, sending data to the MEC server, etc.

[0187] It can be seen that the embodiments of the present invention can realize rapid MEC server deployment and discovery at the application layer and realize related functions of MEC without adding existing LTE or existing network entities and without changing the underlying communication process.

[0188] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A method for discovering a multi-access edge computing MEC server, characterized in that: The method is applied to an application server and includes: Obtaining the MEC server address and location-related information; wherein the location-related information includes but is not limited to the following information: a base station identifier connected to the MEC server and / or a location area identifier to which the base station belongs; The MEC server address and location-associated information are sent to the terminal, so that when the base station identifier in the cell broadcast message read by the terminal during movement is the same as the base station identifier associated with the received MEC server, a connection is established with the MEC server.

2. The method according to claim 1, characterized in that The obtaining of the MEC server address and location-related information includes: Receive the identifier and address of the MEC server and the location association information.

3. The method according to claim 1, characterized in that The obtaining of the MEC server address and location-related information includes: Receive the identifier and address of the MEC server forwarded by the capability exposure platform, as well as the location association information.

4. The method according to claim 1, characterized in that: The sending the MEC server address and location-related information to the terminal includes: The MEC server address and location-related information are sent to the terminal.

5. A method for discovering a multi-access edge computing MEC server, characterized in that: The method is applied to a terminal, comprising: Receiving the MEC server address and location-related information; the MEC server address and location-related information are acquired and sent by the application server; wherein the location-related information includes but is not limited to the following information: a base station identifier connected to the MEC server and / or a location area identifier to which the base station belongs; Establishing a connection with the MEC server based on the MEC server address and location association information; After receiving the MEC server address and location association information, the method further includes: Read cell broadcasts while moving; When it is determined that the base station identifier in the broadcast message is the same as the base station identifier associated with the received MEC server, subsequent operations are performed, wherein the subsequent operations include establishing a local connection.

6. The method according to claim 5, characterized in that The receiving of the MEC server address and location-related information includes: When registering, receive the MEC server address and location association information sent by the application server.

7. A method for discovering a multi-access edge computing MEC server, characterized in that: The method is applied to the MEC server, including: Receiving location-related information sent by a base station; wherein the location-related information includes but is not limited to the following information: a base station identifier connected to the MEC server and / or a location area identifier to which the base station belongs; Sending the address of the MEC server itself and the location association information; Among them, the address of the MEC server and the location association information are used to establish a connection with the MEC server when the base station identifier in the cell broadcast message read by the terminal during movement is the same as the base station identifier associated with the received MEC server.

8. The method according to claim 7, characterized in that After receiving the location association information sent by the base station, the method further includes: The address of the MEC server is sent to the base station for routing when the base station sends subsequent data.

9. The method according to claim 7, characterized in that: The sending the address of the MEC server itself and the location association information includes: Sending the address of the MEC server itself and the location-related information to an application server; or, The address of the MEC server itself and the location association information are sent to the application server via the capability exposure platform.

10. A device for discovering a multi-access edge computing MEC server, characterized in that: The device is applied to an application server and includes: An acquisition module is used to acquire the MEC server address and location-related information; wherein the location-related information includes but is not limited to the following information: a base station identifier connected to the MEC server and / or a location area identifier to which the base station belongs; The first sending module is used to send the MEC server address and location association information to the terminal, and is used to establish a connection with the MEC server when the base station identifier in the cell broadcast message read by the terminal during movement is the same as the base station identifier associated with the received MEC server.

11. A device for discovering a multi-access edge computing MEC server, characterized in that: The device is applied to a terminal, and includes: A first receiving module is configured to receive an MEC server address and location-related information; the MEC server address and location-related information are acquired and sent by an application server; wherein the location-related information includes but is not limited to the following information: an identifier of a base station connected to the MEC server and / or an identifier of a location area to which the base station belongs; A connection module, configured to establish a connection with the MEC server based on the MEC server address and location association information; The first receiving module is also used to read cell broadcasts when moving; When it is determined that the base station identifier in the broadcast message is the same as the base station identifier associated with the received MEC server, subsequent operations are performed, wherein the subsequent operations include establishing a local connection.

12. A device for discovering a multi-access edge computing MEC server, characterized in that: The device is applied to the MEC server and includes: The second receiving module is used to receive location-related information sent by the base station; wherein the location-related information includes but is not limited to the following information: a base station identifier connected to the MEC server and / or a location area identifier to which the base station belongs; A second sending module is used to send the address of the MEC server itself and the location association information; Among them, the address of the MEC server and the location association information are used to establish a connection with the MEC server when the base station identifier in the cell broadcast message read by the terminal during movement is the same as the base station identifier associated with the received MEC server.

13. A device for discovering a multi-access edge computing MEC server, characterized in that: The apparatus comprises: a processor and a memory for storing a computer program capable of running on the processor, Wherein, when the processor is used to run the computer program, it executes the steps of the method described in any one of claims 1 to 4, or executes the steps of the method described in any one of claims 5 to 6, or executes the steps of the method described in any one of claims 7 to 9.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the computer program implements the steps of the method described in any one of claims 1 to 4, or the steps of the method described in any one of claims 5 to 6, or the steps of the method described in any one of claims 7 to 9.

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