Satellite cluster service processing method, device, equipment, medium and product

Abstract

Embodiments of the present application provide a satellite cluster service processing method, device, equipment, medium and product. Through the LCF network element of the cluster core network equipment, the position information of the access satellite cell and the satellite base station reported by each first terminal, or the position information of the tracking area reported by each first terminal, and the current attribute information reported by each satellite base station are received. Then, the first mapping relationship between the satellite cell and the tracking area and the second mapping relationship between the satellite base station and the tracking area are established based on the attribute information. Finally, the satellite cluster service initiated by the target terminal is accurately processed according to the position information reported by each first terminal and the above two types of mapping relationships, thereby providing a feasible technical path for cluster communication in a satellite scenario.

Description

Technical Field

[0001] This application relates to the field of satellite communication technology, and in particular to a method, apparatus, equipment, medium and product for processing satellite trunking services. Background Technology

[0002] With the development of satellite communication technology, non-terrestrial networks (NTN) technology has developed rapidly in recent years. NTN aims to provide connectivity services to areas without terrestrial network coverage through satellite communication technology.

[0003] Among related technologies, terrestrial trunking services can be provided based on Broadband Trunking Communication (B-TrunC) technology using 5G (5th Generation Mobile Communication Technology). Alternatively, satellite data services can be provided based on New Radio Non-Terrestrial Network (NR NTN) technology. However, neither of these methods can currently provide satellite trunking services; therefore, a method that can provide satellite trunking services is urgently needed. Summary of the Invention

[0004] This application provides a method, apparatus, equipment, medium, and product for processing satellite trunking services, thereby achieving the technical effect of providing a method for processing satellite trunking services.

[0005] In a first aspect, embodiments of this application provide a method for processing satellite trunking services, applied to trunking core network equipment, including:

[0006] The location control function (LCF) network element receives location information reported by each first terminal. The location information includes location information of the access satellite cell and location information of the access satellite base station, or location information of the access tracking area.

[0007] The LCF network element receives attribute information reported by each satellite base station and establishes target mapping relationships based on the attribute information. The mapping relationships include the first mapping relationship between the satellite cell and the tracking area and the second mapping relationship between the satellite base station and the tracking area.

[0008] Through the LCF network element, the satellite trunking service initiated by the target terminal is processed based on the location information of the access satellite cell and the access satellite base station reported by the first terminal, or the location information of the access tracking area, the first mapping relationship and the second mapping relationship reported by the first terminal.

[0009] In one possible implementation, the location information reported by each first terminal is received through the location control function (LCF) network element, including:

[0010] For any first terminal, if the first terminal reports location information based on the cell, after the first terminal selects or reselects the access satellite cell, it obtains the location information of the first terminal accessing the satellite cell and the location information of the access satellite base station sent by the satellite base station through the Access and Mobility Management Function (AMF) network element.

[0011] For any first terminal, if the first terminal reports location information based on the tracking area, then after the first terminal accesses the tracking area, the location information of the first terminal accessing the tracking area sent by the satellite base station is obtained through the AMF network element;

[0012] Through the LCF network element, the location information of the first terminal accessing the satellite cell and the location information of the first terminal accessing the satellite base station, or the location information of the first terminal accessing the tracking area, sent by the AMF network element, are received.

[0013] In one possible implementation, the attribute information includes: beam information, the currently included tracking area, and the included satellite cells; establishing a target mapping relationship based on the attribute information includes:

[0014] Each satellite cell is mapped to the tracking area that its coverage falls into based on beam information, thus establishing the first mapping relationship between the satellite cell and the tracking area;

[0015] For any satellite base station, based on the first mapping relationship, the tracking area corresponding to each satellite cell included in the satellite base station is obtained, and the satellite base station is associated with the tracking area corresponding to each satellite cell to establish a second mapping relationship between the satellite base station and the tracking area.

[0016] In one possible implementation, the LCF network element processes the satellite trunking service initiated by the target terminal based on the location information of the access satellite cell and the location information of the access satellite base station reported by the first terminal, or the location information of the access tracking area, a first mapping relationship, and a second mapping relationship reported by the first terminal, including:

[0017] The cluster control function (TCF) network element is used to obtain the cluster service request initiated by the target terminal, which includes a list of called terminals.

[0018] Through the LCF network element, receive location information acquisition requests for each called terminal in the called terminal list sent by the TCF network element;

[0019] For any called terminal, the LCF network element queries the target location information corresponding to the called terminal from the location information of the access satellite cell and the access satellite base station reported by each first terminal, or from the location information of the access tracking area, the first mapping relationship and the second mapping relationship reported by each first terminal, based on the identification information of the called terminal.

[0020] Through the TCF network element, the target location information corresponding to each called terminal sent by the LCF network element is received, and the satellite trunking service initiated by the target terminal is processed according to the target location information corresponding to each called terminal.

[0021] In one possible implementation, for any called terminal, the LCF network element queries the target location information corresponding to the called terminal from the location information of the access satellite cell and the access satellite base station reported by each first terminal, or from the location information of the access tracking area, the first mapping relationship, and the second mapping relationship reported by each first terminal, based on the called terminal's identification information. This includes:

[0022] For any called terminal, the LCF network element queries the first location information corresponding to the called terminal from the location information reported by each first terminal based on the identification information of the called terminal.

[0023] If the first location information indicates both the location information of the access satellite cell and the location information of the access satellite base station, then the first location information is the target location information; or,

[0024] If the first location information indicates the location information of the access tracking area, then the location information of the target satellite cell and the location information of the target satellite base station accessed by the called terminal are determined according to the first mapping relationship, the second mapping relationship and the tracking area accessed indicated by the first location information.

[0025] Among them, the location information of the target satellite cell and the location information of the target satellite base station are the target location information.

[0026] In one possible implementation, the satellite trunking service initiated by the target terminal is processed based on the target location information corresponding to each called terminal, including:

[0027] Based on the target location information corresponding to each called terminal, a list of satellite base stations and a list of satellite cells for group calls are generated to process satellite trunking services initiated by the target terminal.

[0028] Secondly, embodiments of this application provide a satellite trunking service processing apparatus, applied to trunking core network equipment, comprising:

[0029] The receiving module is used to receive location information reported by each first terminal through the location control function (LCF) network element. The location information is either the location information of the access satellite cell or the location information of the access satellite base station, or the location information of the access tracking area.

[0030] The processing module is used to receive attribute information reported by each satellite base station through the LCF network element, and establish a target mapping relationship based on the attribute information. The mapping relationship includes a first mapping relationship between the satellite cell and the tracking area and a second mapping relationship between the satellite base station and the tracking area.

[0031] The processing module is also used to process satellite trunking services initiated by the target terminal through LCF network elements, based on the location information of the access satellite cell and the location information of the access satellite base station reported by each first terminal, or the location information of the access tracking area, the first mapping relationship and the second mapping relationship reported by each first terminal.

[0032] Thirdly, embodiments of this application provide a cluster core network device, including: a memory and a processor;

[0033] The memory stores the instructions that the computer executes;

[0034] The processor executes computer execution instructions stored in memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0035] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.

[0036] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0037] This application provides a method, apparatus, device, medium, and product for processing satellite trunking services. Through the LCF network element of the trunking core network equipment, it receives location information of the access satellite cell and satellite base station reported by each first terminal, or location information of the tracking area reported by each first terminal, as well as current attribute information reported by each satellite base station. Based on the attribute information, a first mapping relationship between satellite cells and tracking areas and a second mapping relationship between satellite base stations and tracking areas are established. Finally, based on the location information reported by each first terminal and the above two mapping relationships, the satellite trunking services initiated by the target terminal are accurately processed, thereby providing a feasible technical path for trunking communication in satellite scenarios. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0039] Figure 1 A schematic diagram of the architecture of B-TrunC 5G, a related technology provided for this application;

[0040] Figure 2 A schematic diagram of a transparent satellite relay architecture provided in this application;

[0041] Figure 3 A schematic diagram of an on-board regeneration architecture provided in this application;

[0042] Figure 4 A schematic diagram of the architecture of a satellite trunking service provided in an embodiment of this application;

[0043] Figure 5 A flowchart illustrating a satellite trunking service processing method provided in this application embodiment;

[0044] Figure 6 A signaling flowchart for a first terminal reporting location information is provided in an embodiment of this application;

[0045] Figure 7 Another signaling flowchart for a first terminal reporting location information provided in this application embodiment;

[0046] Figure 8 A signaling flowchart for satellite base stations reporting attribute information is provided in an embodiment of this application;

[0047] Figure 9 A flowchart illustrating a method for processing satellite trunking services initiated by a target terminal, provided in an embodiment of this application;

[0048] Figure 10 A signaling flowchart for location query provided in an embodiment of this application;

[0049] Figure 11 A schematic diagram of the structure of a satellite trunking service processing device provided in an embodiment of this application;

[0050] Figure 12 This is a schematic diagram of the structure of a cluster core network device provided in an embodiment of this application.

[0051] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0052] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0053] In terrestrial networks, broadband trunking communication has wide applications in public safety, emergency response, government affairs, and transportation. Among them, B-TrunC 5G is a broadband trunking communication system based on 5G technology. In addition to providing basic data connectivity and services, it also provides a variety of trunking command and dispatch services such as voice, video, MMS, and location services.

[0054] Please see Figure 1 , Figure 1 The schematic diagram of the architecture of B-TrunC 5G, a related technology provided in this application, includes, but is not limited to: multiple user terminals included in the terminal cluster, multiple base stations included in the base station cluster, the cluster core network, the dispatch console, and the application server.

[0055] The user terminals included in the terminal cluster can support packet domain services, as well as cluster service functions, logical channels and transmission channels required by cluster services, cluster-related system information and paging information, and the mobility of cluster services.

[0056] The main trunking functions of a base station in a trunking system include: radio resource control (RRC) signaling, trunking channel mapping control, trunking group bearer establishment and control, trunking user plane data transmission, mapping of trunking quality of service (QoS) streams to trunking data radio bearers, and fault mitigation.

[0057] The core network of the trunking system primarily performs the following trunking functions: Trunking service control and management: controlling trunking services such as call control, voice rights management, and command and dispatch. Trunking service mobility management: coordinating with the trunking core network and trunking base stations to ensure the continuity of trunking services. Trunking session management: managing trunking packet data units (PDUs) sessions during point-to-point and point-to-multipoint calls, including session establishment, modification, and release. Trunking user plane management: routing, copying, and forwarding of trunking data. Trunking user and group management: managing trunking user / group subscription data, trunking user status and service status information, and trunking user location information. Group call QoS management: distributing multicast QoS parameters, including the 5G QoS Identifier (5QI), Guaranteed Flow Bit Rate (GFBR), and Aggregated Maximum Bit Rate (AMBR).

[0058] The trunking core network includes, but is not limited to, the following network elements: 5th Generation Core Network (5GC), Trunking User Data Management (TUDM), Trunking Control Function (TCF), Trunking Mobility Function (TMF), Trunking Session Management Function (TSMF), and Trunking User Plane Function (TUPF).

[0059] The main functions provided by 5GC include: providing session management based on a service-oriented architecture, completing data routing, forwarding and QoS assurance through user plane functions, managing user mobility, and supporting seamless switching and location updates of terminals between different base stations and networks.

[0060] The main functions provided by TUDM include: cluster user subscription data management, cluster group subscription data management, and cluster user status information management.

[0061] The main functions provided by TCF include: cluster registration and deregistration, cluster service management, including call control, talk rights management, authentication of the cluster dispatch console, and cluster policy control.

[0062] The main functions provided by TMF include: cluster user plane management, replication, routing and distribution of cluster business data, etc.

[0063] The main functions provided by TSMF include: cluster group session management, TUPF selection, etc.

[0064] The main functions provided by TUPF include: cluster downlink point-to-multipoint packet inspection and user plane policy rule enforcement, cluster downlink point-to-multipoint data replication, routing and distribution, etc.

[0065] The 5GC includes the Access and Mobility Management Function (AMF) network element. The main functions provided by the AMF include: terminal registration management, connection management, mobility management, processing tracking area update requests, paging management, etc.

[0066] Non-terrestrial networks refer to communication networks built using non-terrestrial communication carriers such as satellites and high-altitude platforms. Their core function is to utilize space-based or high-altitude equipment to achieve signal coverage, filling coverage gaps in remote areas, oceans, deserts, disaster zones, and other similar scenarios. Based on 5G standards, particularly 5G NR technology, the 3GPP organization extends terrestrial network coverage through NTN, a technology known as NR NTN.

[0067] in, Figure 2 and Figure 3 The architecture supporting satellite access based on a 5G system is described. Figure 2 This is a schematic diagram of a transparent satellite relay architecture provided in this application. Figure 3 This is a schematic diagram of an on-board regeneration architecture provided in this application.

[0068] exist Figure 2 In this system, User Equipment (UE), i.e., mobile phones and other terminal devices, establishes a connection with the satellite through a service link. The satellite, as a core node in air-to-ground communication, performs transparent forwarding; that is, after receiving signals from the UE, it forwards the signals to the ground gateway station via a feeder link, and can also forward signals from the ground gateway station back to the UE. The ground gateway station, equipped with a satellite receiving antenna, receives signals forwarded by the satellite and also transmits them to the base station in a transparent manner, and conversely, forwards signals from the base station to the satellite. The base station communicates with the 5GC through the 3GPP Next Generation Interface (NG) and is responsible for connecting the signals from the ground gateway station to the core network. The 5GC, as the core control and data forwarding hub of the network, connects to the data network through the 3GPP N6 interface, ultimately enabling communication and data interaction between the UE and the data network, such as the Internet.

[0069] exist Figure 3 In this system, the UE establishes a wireless connection with the satellite-based base station through the 3GPP air interface (UMTS Terrestrial Radio Access Network User Equipment Interface, Uu). The satellite-based base station is a device that integrates base station and satellite functions. The satellite-based base station communicates with the ground gateway station through the 3GPP NG interface, forwarding the UE's signals to the ground gateway station and simultaneously receiving signals from the ground gateway station and forwarding them to the UE. The ground gateway station interacts with the 5GC through the 3GPP NG interface, responsible for connecting the satellite-based base station's signals to the core network. The 5GC, as the core control and data forwarding hub of the network, connects to the data network, such as the Internet, through the 3GPP N6 interface, ultimately enabling communication and data exchange between the UE and the data network.

[0070] However, neither of the above can yet provide satellite cluster services.

[0071] In existing terrestrial networks, when establishing a data service for an RRC idle terminal, the network pages the terminal in the Tracking Area (TA). After the terminal enters the connected state, the network knows the terminal's current cell and allocates radio resources within that cell. Because trunking services are characterized by a single call with multiple recipients, a single call may involve multiple called terminals. To avoid multiple called terminals simultaneously entering the connected state, causing significant signaling latency and load, the B-TrunC 5G system supports called terminals remaining in the idle state to receive services. This characteristic of trunking services also applies to satellite communication networks.

[0072] In terrestrial 5G networks, both the tracking area and the cell are fixed relative to the ground. One tracking area corresponds to multiple cells, and one cell corresponds to one tracking area; this correspondence is deterministic. However, in the scenario of low-Earth orbit (LEO) satellite communication with mobile cells, the satellites move rapidly, and the wireless link of the mobile cell is provided by the beams of the coverage area sliding across the Earth's surface, such as when LEO satellites generate fixed or non-directional beams. In the mobile cell scenario, the tracking area is fixed relative to the ground, while the cell's position relative to the ground is not fixed, and the correspondence between the tracking area and the cell is dynamic. One tracking area corresponds to multiple satellite cells, and the corresponding satellite cells are variable; that is, one satellite cell may correspond to multiple tracking areas, and the currently corresponding tracking area (TA) is changing.

[0073] In the aforementioned technologies, terrestrial 5G can determine the current cell accessed by a terminal through the logic of "TA paging + resource allocation after the terminal enters the connected state". However, as can be seen from the above, because the terminal needs to remain in an idle state and the mapping between TA and satellite cells changes dynamically, the network cannot know the current satellite cell / base station information accessed by the terminal when it is in an idle state. Consequently, when initiating a cluster service, the network does not know which cells / base stations to paging the called terminal in order to allocate service resources.

[0074] Therefore, this application proposes a method for processing satellite trunking services. The method involves receiving location information transmitted by each terminal through an LCF network element. This location information can be location information of the accessed satellite cell or satellite base station, or location information of the accessed tracking area. Based on the attribute information reported by each satellite base station, a mapping relationship between the satellite cell / satellite base station and the tracking area is established. This solves the problem of tracing the location of idle called terminals in dynamic mapping scenarios, ultimately achieving effective processing of satellite trunking services.

[0075] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0076] To facilitate understanding of the method in this application, the system architecture diagram of the satellite trunking service in this application is first described below. Please refer to [link / reference]. Figure 4 , Figure 4 This is a schematic diagram of the architecture of a satellite trunking service provided in an embodiment of this application. Figure 4 The architecture and Figure 1 In contrast, the user terminals in the terminal cluster are satellite-accessible terminals, the base stations in the base station cluster are satellite base stations, the cluster core network is a satellite cluster core network, and a new Location Control Function (LCF) network element has been added to the satellite cluster core network.

[0077] The user terminal is a satellite-accessible terminal that supports trunking service processing under satellite access and can report its location information to the satellite base stations and the satellite trunking core network. The base stations in the trunking are satellite trunking base stations that support trunking wireless transmission under satellite access. They can receive location information from user terminals accessing the satellite and forward it to the satellite trunking core network, and can also report their own location information to the satellite trunking core network. The trunking core network is enhanced to a satellite trunking core network, adding the LCF (Location Control Filter) element. The LCF supports location control functions, including sending, receiving, storing, managing, and querying location information for all satellite trunking terminals and satellite trunking base stations.

[0078] The following describes the processing procedure for the satellite trunking service in this application based on the above architecture. Please refer to [link to relevant documentation]. Figure 5 , Figure 5 This is a flowchart illustrating a method for processing satellite trunking services provided in an embodiment of this application. The execution entity of this method can be... Figure 4 In the cluster core network device, the method may include the following steps:

[0079] S501. The location information reported by each first terminal is received through the location control function (LCF) network element. The location information is either the location information of the access satellite cell or the location information of the access satellite base station, or the location information of the access tracking area.

[0080] One possible implementation is that, for any first terminal, if the first terminal reports location information based on the cell, then after the first terminal accesses the satellite cell, it obtains the location information of the first terminal accessing the satellite cell and the location information of the first terminal accessing the satellite base station sent by the satellite base station through the Access and Mobility Management Function (AMF) network element.

[0081] For any first terminal, if the first terminal reports location information based on the tracking area, then after the first terminal accesses the tracking area, the location information of the first terminal accessing the tracking area sent by the satellite base station is obtained through the AMF network element.

[0082] Through the LCF network element, the location information of the first terminal accessing the satellite cell and the location information of the first terminal accessing the satellite base station, or the location information of the first terminal accessing the tracking area, sent by the AMF network element, are received.

[0083] S502. Through the LCF network element, the attribute information reported by each satellite base station is received, and a target mapping relationship is established based on the attribute information. The mapping relationship includes the first mapping relationship between the satellite cell and the tracking area and the second mapping relationship between the satellite base station and the tracking area.

[0084] In this embodiment, the attribute information reported by each satellite base station can be received through the LCF network element.

[0085] Optionally, the attribute information includes, but is not limited to: beam information, currently included tracking areas and included satellite cells, and may also include orbital parameters, ephemeris data, beam configuration information, beam information, cell and beam mapping table, tracking area list, etc.

[0086] When a satellite base station is initially started up or when the coverage tracking area or satellite cell changes due to satellite movement, it will report attribute information to the LCF network element, including its own identifier, a list of all currently maintained satellite cells, and the corresponding coverage tracking area identifier for each satellite cell.

[0087] After receiving information through the standardized interface, the LCF network element first verifies the validity of the base station identifier and the association logic between the cell and tracking area. Then, it stores the information in a hierarchical structure according to the satellite base station-satellite cell-tracking area hierarchy. Based on the stored information, it constructs two types of mapping relationships. For example, it can use the identifier information of the satellite cell as the key and the identifier information of the corresponding tracking area as the value to generate the first mapping relationship between the satellite cell and the tracking area. It can also group the satellite base station by its identifier information, extract the tracking area identifier information of all satellite cells under it, and use the identifier information of the satellite base station as the key and the identifier information of the tracking area as the value to generate the second mapping relationship between the satellite base station and the tracking area.

[0088] In addition, the two types of mapping relationships will be updated in real time based on the attribute update information subsequently reported by the satellite base station to ensure that the mapping is consistent with the dynamic coverage of the satellite cell, thereby providing an accurate basis for locating idle called terminals to handle trunking services.

[0089] S503. Through the LCF network element, based on the location information of the access satellite cell and the location information of the access satellite base station reported by the first terminal, or the location information of the access tracking area, the first mapping relationship and the second mapping relationship reported by the first terminal, the satellite trunking service initiated by the target terminal is processed.

[0090] In this embodiment, when processing satellite cluster services initiated by the target terminal, the following two methods can be used.

[0091] One possible implementation is that, through the LCF network element, based on the location information of the access satellite cell and the access satellite base station reported by the first terminal, the precise target location information of the called terminal being called by the target terminal can be directly determined from the reported location information. This target location information consists of the location information of the access satellite cell and the access satellite base station. This target location information is precise.

[0092] Another possible implementation is that, through the LCF network element, based on the location information of the access tracking area reported by the first terminal, the ambiguous first location information of the called terminal being called by the target terminal, i.e., the location information of the access satellite cell, can be determined from the first mapping relationship. Furthermore, the ambiguous second location information of the called terminal being called by the target terminal, i.e., the location information of the access satellite base station, can be determined from the second mapping relationship.

[0093] In the above embodiments of this application, the LCF network element of the trunking core network device receives location information of the access satellite cell and satellite base station reported by each first terminal, or location information of the tracking area reported by each first terminal, as well as current attribute information reported by each satellite base station. Then, based on the attribute information, a first mapping relationship between the satellite cell and the tracking area and a second mapping relationship between the satellite base station and the tracking area are established. Finally, based on the location information reported by each first terminal and the above two mapping relationships, the satellite trunking service initiated by the target terminal is accurately processed, thereby providing a feasible technical path for trunking communication in satellite scenarios.

[0094] Furthermore, based on the above embodiments, the process of the first terminal reporting location information is illustrated below through the following embodiments. Please refer to [link to relevant documentation]. Figure 6 , Figure 6 This is a signaling flowchart for a first terminal reporting location information, provided as an embodiment of this application.

[0095] S601, LCF network element sends control information on the terminal's reported location to AMF network element.

[0096] The control information is used to indicate whether to report location information.

[0097] The S602 and AMF network elements send the control information to the satellite base station.

[0098] S603. Each first terminal initiates registration by sending a registration request message to the accessed satellite base station.

[0099] Each terminal sends a Registration Request message to the corresponding satellite base station based on the satellite base station it accesses and according to preset rules, such as registering at a preset time or periodically.

[0100] The registration request scenario can be either the initial registration of each first terminal or the registration scenario where the tracking area is updated.

[0101] S604. Each satellite base station uploads the registration request message sent by the first terminal to the AMF network element.

[0102] The S605 and AMF network elements send registration and acceptance messages to each satellite base station.

[0103] AMF network elements send Registration Accept messages to each satellite base station.

[0104] S606. Each satellite base station will send the registration and reception message and control information to the corresponding first terminal.

[0105] S607. Each first terminal sends a registration completion message to the satellite base station and reports the corresponding location information to the satellite base station.

[0106] Each terminal sends a Registration Complete message to the satellite base station and reports its location information to the satellite base station.

[0107] S608. Each satellite base station will report the location information of the corresponding first terminal to the AMF network element.

[0108] S609 and AMF network elements report the location information of each first terminal to LCF network element.

[0109] Therefore, in this embodiment, the location information reported by each first terminal may be the location information of the access satellite cell and the location information of the access satellite base station, or the location information of the access tracking area.

[0110] When the satellite cell accessed by each primary terminal is updated, i.e., each primary terminal selects a different satellite cell to access, it will re-report the new location information. Please refer to [link to relevant documentation]. Figure 7 , Figure 7 This is a signaling flowchart for a first terminal reporting location information, provided as an embodiment of this application.

[0111] S701, each first terminal has been connected to the new satellite cell.

[0112] S702. When the satellite cell newly accessed by each first terminal is updated, each first terminal enters the RRC connection state.

[0113] For the first terminal to report location information, it must first establish a signaling connection with the network, namely the RRC connection state. The RRC connection state is the state in which the first terminal has established an RRC signaling connection with the satellite base station. Only in this state can the first terminal transmit location information to the LCF network element of the core network through the satellite base station. Its essence is to obtain the signaling channel required for reporting location information.

[0114] S703, each first terminal reports new location information to the satellite base station.

[0115] The newly reported location information includes location information for accessing new satellite cells and location information for accessing new satellite base stations.

[0116] S704. Each satellite base station will report the new location information of the corresponding first terminal to the AMF network element.

[0117] The S705 and AMF network elements report the new location information of each first terminal to the LCF network element.

[0118] according to Figure 6 and Figure 7The signaling flowchart shown illustrates that the LCF network element can maintain the location information reported by each first terminal. When the LCF network element receives new location information from a first terminal, it updates the terminal's original location information to the new location information based on the terminal's identification information. This location information can be the location information of the access satellite cell, the location information of the access satellite base station, or the location information of the access tracking area.

[0119] In the above embodiments of this application, the LCF network element sends control information through the AMF and satellite base station to trigger the first terminal to report its location during registration. When the first terminal accesses a new satellite cell, it enters the RRC connected state and re-reports its location, which is then forwarded to the LCF network element via the satellite base station and AMF. The LCF network element then maintains the real-time nature of the first terminal's location information. This method solves the problem of dynamic changes in the first terminal's location in satellite scenarios, ensuring that the information of the satellite cell, base station, or tracking area currently accessed by the first terminal can be grasped in real time, thereby improving the accuracy and reliability of satellite trunking communication.

[0120] Furthermore, based on any of the above embodiments, the process of satellite base stations reporting attribute information is illustrated below through the following examples. Please refer to... Figure 8 , Figure 8 This is a signaling flowchart for reporting attribute information by a satellite base station, provided as an embodiment of this application.

[0121] S801. At the predicted target time, trigger the LCF network element to send an enable message to the AMF network element.

[0122] LCF network elements can establish mapping relationships between satellite cells and satellite base stations and tracking areas based on the attribute information reported by each satellite base station.

[0123] Optionally, each satellite cell is mapped to a tracking area within its coverage area based on beam information, establishing a first mapping relationship between satellite cells and tracking areas. For any satellite base station, based on the first mapping relationship, the tracking areas corresponding to each satellite cell included by the satellite base station are obtained, and the satellite base station is associated with the tracking areas corresponding to each satellite cell, establishing a second mapping relationship between satellite base stations and tracking areas.

[0124] Specifically, for each satellite cell, its beam information needs to be extracted first. This information includes the beam's latitude and longitude coverage area and the geographical boundary data corresponding to the beam number. Then, the preset fixed geographical range of the tracking area is retrieved. This range typically exists in the form of administrative regions or geographical coordinate boundaries defined on the ground. Next, through geographical range matching—that is, determining whether the satellite cell's beam coverage falls within the geographical boundary of a certain tracking area—each satellite cell is mapped to the tracking area involved in its coverage area, forming a first mapping relationship between satellite cell identification information and tracking area identification information. If a satellite cell's beam spans multiple tracking areas, then that satellite cell needs to correspond to the identification information of multiple tracking areas.

[0125] For any given satellite base station, first obtain the list of all satellite cells it maintains, along with the first mapping relationship previously established for these satellite cells. Extract the identification information of all tracking areas corresponding to these satellite cells from the first mapping relationship, and deduplicate the extracted tracking area identifiers to avoid duplicate association of the same tracking area. Then, bind the deduplicated set of tracking areas to the identification information of the satellite base station, finally establishing a second mapping relationship between the satellite base station's identification information and the tracking area identification information. This ensures that the mapping result accurately reflects the actual tracking area coverage of all satellite cells under the satellite base station's jurisdiction.

[0126] In addition, the LCF network element can also predict the target time when the mapping relationship between the satellite base station and the tracking area changes based on the beam information of the satellite base station at the previous historical moment.

[0127] Therefore, when the predicted target time is reached, the LCF network element is triggered to send an enable message to the AMF network element. This enable message is used to indicate that the satellite base station can report its attribute information.

[0128] The S802 and AMF network elements will send enable messages to each satellite base station.

[0129] S803. Each satellite base station reports its attribute information to the AMF network element based on the enable message.

[0130] The S804 and AMF network elements report the attribute information reported by each satellite base station to the LCF network element.

[0131] Based on the attribute information reported by each satellite base station, the S805 and LCF network elements establish a mapping relationship between the satellite cell and the satellite base station and the tracking area respectively.

[0132] As time goes on, LCF network elements can predict subsequent moments when the mapping relationship changes based on the above method, and then repeat the above steps to obtain an updated and accurate mapping relationship.

[0133] In the above embodiments of this application, the LCF network element actively predicts the time of change in the mapping relationship between the satellite base station and the tracking area, and triggers the transmission of enable messages. This drives the satellite base station to report attribute information as needed, which is then forwarded by the AMF network element to the LCF network element for updating the mapping relationship, forming a closed-loop mechanism of prediction-triggering-reporting-updating. This method avoids meaningless frequent reporting by the satellite base station, reducing signaling load, and can obtain updated data in a timely manner when the mapping relationship changes, ensuring that the mapping always matches the actual movement state of the satellite beam, thereby effectively improving the resource utilization and service reliability of the satellite trunking network.

[0134] Furthermore, based on any of the above embodiments, the process of processing satellite trunking services initiated by a target terminal is illustrated below through the following embodiments. Please refer to... Figure 9 , Figure 9 A flowchart illustrating a method for processing satellite trunking services initiated by a target terminal, provided in this application embodiment, includes the following steps:

[0135] S901. Obtain the cluster service request initiated by the target terminal through the cluster control function (TCF) network element. The cluster service request includes a list of called terminals.

[0136] The target terminal initiates a cluster service request, which includes a list of called terminals and is sent to the TCF network element. The TCF network element then establishes cluster group call resources for multiple called terminals.

[0137] S902. Receive location information acquisition requests for each called terminal in the called terminal list sent by the TCF network element via the LCF network element.

[0138] The following is combined Figure 10 This describes the method of this embodiment. Figure 10 A signaling flowchart for location query provided in this application embodiment includes:

[0139] S1001, TCF network element sends a request to LCF network element to query location information.

[0140] S1002, LCF network element reports the queried location information to TCF network element.

[0141] The TCF network element sends a location information retrieval request for each called terminal in the called terminal list to the LCF network element in order to obtain the location information of the called terminals from the LCF network element. This location information can be the location information of the access satellite cell or the access satellite base station, or the location information of the access tracking area.

[0142] S903. For any called terminal, the LCF network element queries the target location information corresponding to the called terminal from the location information of the access satellite cell and the location information of the access satellite base station reported by each first terminal, or from the location information of the access tracking area, the first mapping relationship and the second mapping relationship reported by each first terminal, based on the identification information of the called terminal.

[0143] For any called terminal, the LCF network element queries the first location information corresponding to the called terminal from the location information reported by each first terminal, based on the identification information of the called terminal.

[0144] If the first location information indicates both the location information of the access satellite cell and the location information of the access satellite base station, then the first location information is the target location information. Specifically, the first location information is the precise location information of the called terminal.

[0145] Alternatively, if the first location information indicates location information for accessing a tracking area, then based on the first mapping relationship, the second mapping relationship, and the tracking area indicated by the first location information, the location information of the target satellite cell and the target satellite base station accessed by the called terminal are determined. This location information is fuzzy.

[0146] Among them, the location information of the target satellite cell and the location information of the target satellite base station are the target location information.

[0147] S904. Receive target location information corresponding to each called terminal from the LCF network element via the TCF network element, and process the satellite trunking service initiated by the target terminal based on the target location information corresponding to each called terminal.

[0148] Based on the target location information corresponding to each called terminal, a list of satellite base stations and a list of satellite cells for group calls are generated to process satellite trunking services initiated by the target terminal.

[0149] After receiving the target location information of each called terminal returned by the LCF network element, the TCF network element first processes the information based on its accuracy. If the target location information is precise satellite cell and satellite base station information, meaning the called terminal reports location information based on cells, the TCF network element combines the current satellite cells of all called terminals to generate a precise list of cluster call cells, combines the current satellite base stations to generate a precise list of cluster call base stations, and / or combines the current tracking areas to generate a list of cluster call tracking areas. If the target location information is fuzzy information derived from tracking areas combined with mapping relationships, a more fuzzy version of the cluster call cell list, cluster call base station list, and cluster call tracking area list is generated.

[0150] The TCF network element notifies the Trunking Service Media Function (TSMF) network element to establish a trunking group call session, carrying the aforementioned list, which is then forwarded by the TSMF network element to the AMF network element. Based on the trunking group call satellite base station list, the AMF network element specifically notifies the satellite base stations within the list to establish a trunking group call context, and simultaneously distributes the corresponding trunking group call satellite cell list to that satellite base station, thereby reducing invalid participation from non-target satellite base stations / cells. Upon receiving the information, the satellite base station establishes trunking group call radio resources only within the cells specified in the trunking group call satellite cell list, and performs targeted paging of the called terminal within these cells, while simultaneously pushing the group call resource information to the called terminal.

[0151] The satellite base station sends paging messages in a designated cell through a dedicated trunking paging channel. The idle-state called terminal does not need to enter the RRC connection state; it can receive the message simply by detecting the dedicated paging channel and directly synchronize to the trunking group call resources of the target cell based on the resource parameters in the message. This completes the trunking service access in the idle state, and finally receives the trunking service data, realizing the complete processing of satellite trunking services.

[0152] In the above embodiments of this application, the TCF network element obtains the trunking service request and the list of called terminals, and the LCF network element queries the location information of each called terminal as needed. It can directly retrieve precise satellite cell / base station location information, or deduce fuzzy satellite cell / base station location information from tracking area information by combining mapping relationships, thus obtaining the target location information. The target location information is then fed back to the TCF network element for service processing. This method ensures the flexibility and accuracy of obtaining called terminal location information, thereby improving the reliability of satellite trunking service processing.

[0153] This application also provides a processing apparatus for satellite trunking services; please refer to [link to relevant documentation]. Figure 11 , Figure 11 This is a schematic diagram of the structure of a satellite trunking service processing device provided in an embodiment of this application, as shown below. Figure 11 As shown, it includes:

[0154] The receiving module 1101 is used to receive location information reported by each first terminal through the location control function (LCF) network element. The location information is either the location information of the access satellite cell or the location information of the access satellite base station, or the location information of the access tracking area.

[0155] The processing module 1102 is used to receive attribute information reported by each satellite base station through the LCF network element, and establish a target mapping relationship based on the attribute information. The mapping relationship includes a first mapping relationship between the satellite cell and the tracking area and a second mapping relationship between the satellite base station and the tracking area.

[0156] The processing module 1102 is also used to process the satellite trunking service initiated by the target terminal through the LCF network element, based on the location information of the access satellite cell and the location information of the access satellite base station reported by each first terminal, or the location information of the access tracking area, the first mapping relationship and the second mapping relationship reported by each first terminal.

[0157] One possible implementation is that the receiving module 1101 is specifically used for:

[0158] For any first terminal, if the first terminal reports location information based on the cell, then after the first terminal accesses the satellite cell, it obtains the location information of the first terminal accessing the satellite cell and the location information of the first terminal accessing the satellite base station sent by the satellite base station through the Access and Mobility Management Function (AMF) network element.

[0159] For any first terminal, if the first terminal reports location information based on the tracking area, then after the first terminal accesses the tracking area, the location information of the first terminal accessing the tracking area sent by the satellite base station is obtained through the AMF network element.

[0160] Through the LCF network element, the location information of the first terminal accessing the satellite cell and the location information of the first terminal accessing the satellite base station, or the location information of the first terminal accessing the tracking area, sent by the AMF network element, are received.

[0161] One possible implementation is that the attribute information includes: beam information, the currently included tracking area, and the included satellite cells. The processing module 1102 is specifically used for:

[0162] Each satellite cell is mapped to the tracking area within its coverage area based on beam information, thus establishing the first mapping relationship between the satellite cell and the tracking area.

[0163] For any satellite base station, based on the first mapping relationship, the tracking area corresponding to each satellite cell included in the satellite base station is obtained, and the satellite base station is associated with the tracking area corresponding to each satellite cell to establish a second mapping relationship between the satellite base station and the tracking area.

[0164] One possible implementation is that the processing module 1102 is specifically used for:

[0165] The cluster control function (TCF) network element is used to obtain cluster service requests initiated by the target terminal, which include a list of called terminals.

[0166] The LCF network element receives location information retrieval requests from the TCF network element for each called terminal in the called terminal list.

[0167] For any called terminal, the LCF network element queries the target location information corresponding to the called terminal from the location information of the access satellite cell and the access satellite base station reported by each first terminal, or from the location information of the access tracking area, the first mapping relationship and the second mapping relationship reported by each first terminal, based on the identification information of the called terminal.

[0168] Through the TCF network element, the target location information corresponding to each called terminal sent by the LCF network element is received, and the satellite trunking service initiated by the target terminal is processed according to the target location information corresponding to each called terminal.

[0169] One possible implementation is that the processing module 1102 is specifically used for:

[0170] For any called terminal, the LCF network element queries the first location information corresponding to the called terminal from the location information reported by each first terminal, based on the identification information of the called terminal.

[0171] If the first location information indicates both the location information of the access satellite cell and the location information of the access satellite base station, then the first location information is the target location information. Alternatively,

[0172] If the first location information indicates the location information of the access tracking area, then the location information of the target satellite cell and the location information of the target satellite base station accessed by the called terminal are determined according to the first mapping relationship, the second mapping relationship and the tracking area accessed indicated by the first location information.

[0173] Among them, the location information of the target satellite cell and the location information of the target satellite base station are the target location information.

[0174] One possible implementation is that the processing module 1102 is specifically used for:

[0175] Based on the target location information corresponding to each called terminal, a list of satellite base stations and a list of satellite cells for group calls are generated to process satellite trunking services initiated by the target terminal.

[0176] The satellite trunking service processing device provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0177] Figure 12 This is a schematic diagram of the structure of a cluster core network device provided in an embodiment of this application. Figure 12As shown, the cluster core network device provided in this embodiment includes at least one processor 1201 and a memory 1202. Optionally, the device further includes a communication component 1203. The processor 1201, memory 1202, and communication component 1203 are connected via a bus 1204.

[0178] In a specific implementation, at least one processor 1201 executes computer execution instructions stored in memory 1202, causing at least one processor 1201 to perform the above-described method.

[0179] The specific implementation process of processor 1201 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0180] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0181] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0182] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0183] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0184] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0185] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0186] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0187] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0188] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0189] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0190] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0191] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0192] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for processing satellite trunking services, characterized in that, Applied to trunking core network devices, including: The location control function (LCF) network element receives location information reported by each first terminal. The location information is either the location information of the access satellite cell or the location information of the access satellite base station, or the location information of the access tracking area. The LCF network element receives attribute information reported by each satellite base station and establishes a target mapping relationship based on the attribute information. The mapping relationship includes a first mapping relationship between the satellite cell and the tracking area and a second mapping relationship between the satellite base station and the tracking area. The LCF network element processes satellite trunking services initiated by the target terminal based on the location information of the access satellite cell and the access satellite base station reported by the first terminal, or the location information of the access tracking area, the first mapping relationship, and the second mapping relationship reported by the first terminal.

2. The method according to claim 1, characterized in that, The location information reported by each first terminal is received through the location control function (LCF) network element, including: For any first terminal, if the first terminal reports location information based on the cell, then after the first terminal accesses the satellite cell, it obtains the location information of the first terminal accessing the satellite cell and the location information of the first terminal accessing the satellite base station sent by the satellite base station through the Access and Mobility Management Function (AMF) network element. For any first terminal, if the first terminal reports location information based on the tracking area, then after the first terminal accesses the tracking area, the location information of the first terminal accessing the tracking area sent by the satellite base station is obtained through the AMF network element; The LCF network element receives the location information of the first terminal accessing the satellite cell and the location information of the first terminal accessing the satellite base station, or the location information of the first terminal accessing the tracking area, sent by the AMF network element.

3. The method according to claim 1, characterized in that, The attribute information includes: beam information, the currently included tracking area, and the included satellite cells; the step of establishing a target mapping relationship based on the attribute information includes: Each satellite cell is mapped to the tracking area that its coverage falls into based on beam information, thus establishing the first mapping relationship between the satellite cell and the tracking area; For any satellite base station, based on the first mapping relationship, the tracking area corresponding to each satellite cell included in the satellite base station is obtained, and the satellite base station is associated with the tracking area corresponding to each satellite cell to establish a second mapping relationship between the satellite base station and the tracking area.

4. The method according to claim 1, characterized in that, The step of processing satellite trunking services initiated by the target terminal through the LCF network element, based on the location information of the access satellite cell and the location information of the access satellite base station reported by the first terminal, or the location information of the access tracking area reported by the first terminal, the first mapping relationship, and the second mapping relationship, includes: The cluster control function (TCF) network element is used to obtain the cluster service request initiated by the target terminal, which includes a list of called terminals. The LCF network element receives location information acquisition requests for each called terminal in the called terminal list sent by the TCF network element. For any called terminal, the LCF network element queries the target location information corresponding to the called terminal from the location information of the access satellite cell and the location information of the access satellite base station reported by each first terminal, or from the location information of the access tracking area, the first mapping relationship and the second mapping relationship reported by each first terminal, based on the identification information of the called terminal. The TCF network element receives target location information corresponding to each called terminal sent by the LCF network element, and processes the satellite trunking service initiated by the target terminal based on the target location information corresponding to each called terminal.

5. The method according to claim 4, characterized in that, For any called terminal, the LCF network element queries the target location information corresponding to the called terminal based on the called terminal's identification information, from the location information of the access satellite cell and the location information of the access satellite base station reported by each first terminal, or from the location information of the access tracking area, the first mapping relationship, and the second mapping relationship reported by each first terminal, including: For any called terminal, the LCF network element queries the first location information corresponding to the called terminal from the location information reported by each first terminal based on the identification information of the called terminal. If the first location information indicates both the location information of the access satellite cell and the location information of the access satellite base station, then the first location information is the target location information; or, If the first location information indicates the location information of the access tracking area, then the location information of the target satellite cell and the location information of the target satellite base station accessed by the called terminal are determined according to the first mapping relationship, the second mapping relationship and the tracking area accessed indicated by the first location information. The location information of the target satellite cell and the location information of the target satellite base station are referred to as the target location information.

6. The method according to claim 5, characterized in that, The step of processing the satellite trunking service initiated by the target terminal based on the target location information corresponding to each called terminal includes: Based on the target location information corresponding to each called terminal, a list of satellite base stations and a list of satellite cells for group calls are generated to process satellite trunking services initiated by the target terminals.

7. A processing apparatus for satellite trunking services, characterized in that, Applied to trunking core network devices, including: The receiving module is used to receive location information reported by each first terminal through the location control function (LCF) network element. The location information is the location information of the access satellite cell and the location information of the access satellite base station, or the location information of the access tracking area. The processing module is used to receive attribute information reported by each satellite base station through the LCF network element, and establish a target mapping relationship based on the attribute information. The mapping relationship includes a first mapping relationship between the satellite cell and the tracking area and a second mapping relationship between the satellite base station and the tracking area. The processing module is further configured to process the satellite cluster service initiated by the target terminal through the LCF network element, based on the location information of the access satellite cell and the location information of the access satellite base station reported by each first terminal, or the location information of the access tracking area reported by each first terminal, the first mapping relationship and the second mapping relationship.

8. A trunking core network device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-6.

10. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method described in any one of claims 1-6.

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