Group call method and system in cluster communication

Abstract

This invention provides a group call method and system in trunked communication, applied to the core network, comprising: determining a target paging group, the target paging group including N terminal devices, where N is an integer greater than or equal to 1; determining M access devices based on the network location areas of the N terminal devices, where M is an integer greater than or equal to 1, and the M access devices can cover the network location areas of all terminal devices in the target paging group; and sending a group call message to each access device, so that the access devices perform a group call operation on the target paging group. This solves the problem in related technologies where beam selection is impossible when the base station is moving, thereby achieving the effect of performing group calls on terminals using the beam selected by the mobile base station.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of trunked radio communication, and more specifically, to a group call method and system in trunked radio communication. Background Technology

[0002] In 4G-based trunking systems, downlink point-to-multipoint transmission only supports single-beam transmission and does not support base station mobility. Multi-beam transmission is a crucial technical feature of the 5G wireless communication system air interface. On the one hand, the existing 4G-based trunking systems, which only support single-beam transmission for downlink point-to-multipoint transmission, prevent the trunking system from fully utilizing the capabilities of the 5G system. Since 5G introduces multi-beam characteristics, multi-beam systems need to solve the beam selection problem. Furthermore, since 5G base stations can be deployed not only on the ground but also on floating platforms in the air, and since air-deployed 5G base stations are not stationary relative to the ground, the beam selection problem in cases of base station movement also needs to be addressed.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] This invention provides a group call method and system in trunked communication, which at least solves the problem of beam selection being impossible when the base station is mobile in related technologies.

[0005] According to an embodiment of the present invention, a group call method in trunked communication is provided, applied to a core network, comprising: determining a target paging group, wherein the target paging group includes N terminal devices, where N is an integer greater than or equal to 1; determining M access devices based on the network location areas of the N terminal devices, wherein M is an integer greater than or equal to 1, and the M access devices can cover the network location areas of all the terminal devices in the target paging group; and sending a group call message to each of the access devices, so that the access devices perform a group call operation on the target paging group.

[0006] In an exemplary embodiment, before determining M access devices based on the network location regions of the N terminal devices, the method further includes: receiving the network location regions reported by the terminal devices; or, receiving a first geographical location reported by the terminal devices and determining the network location regions of the terminal devices based on the first geographical location.

[0007] In an exemplary embodiment, determining the network location area of ​​the terminal device based on the first geographical location includes: determining the network location area corresponding to the first geographical location in a first correspondence relationship, wherein the first correspondence relationship includes a correspondence relationship between geographical areas and network location areas, and the core network stores the first correspondence relationship.

[0008] In one exemplary embodiment, determining M access devices based on the network location regions of N terminal devices includes: determining the access devices covering the network location regions in a second correspondence relationship, wherein the second correspondence relationship includes the correspondence relationship between each access device and the network location region it covers, the core network stores the second correspondence relationship, the access devices are movable, and the second correspondence relationship is updated as the network location region covered by the access devices changes.

[0009] In one exemplary embodiment, sending a group call message to each of the access devices includes: sending the group call message to a target access device, wherein the target access device is any one of the M access devices, the group call message carries a set of network location areas, the set of network location areas being the union of the network location areas of all the terminal devices in the target paging group, or the set of network location areas being the union of the network location areas of the terminal devices covered by the target access device.

[0010] In one exemplary embodiment, the access device transmits multiple beams, at least one of which covers the network location area, so that the access device selects a target beam from the multiple beams it transmits to perform the group call operation to the network location area it covers.

[0011] In one exemplary embodiment, the network location region is a tracking region.

[0012] In one exemplary embodiment, the access device is a base station, which is deployed on an airborne mobile platform and moves with the airborne mobile platform.

[0013] According to another embodiment of the present invention, a group call method in trunked communication is provided, applied to an access device, comprising: receiving a group call message sent by a core network, wherein the group call message carries a set of network location areas; determining a target beam covering a network location area in the set of network location areas based on a third correspondence between a transmitted beam and the network location areas it covers, thereby obtaining a target beam set, wherein the access device stores the third correspondence; and performing a group call operation on at least one terminal device through the target beam set.

[0014] In an exemplary embodiment, determining a target beam covering a network location area in the set of network location areas based on a third correspondence between the transmitted beam and the network location area it covers, and obtaining a target beam set, includes: determining a target tracking area covered by the access device in the set of network location areas; and determining the beams in the third correspondence that have the correspondence with the target tracking area as target beams, thereby obtaining the target beam set.

[0015] In an exemplary embodiment, before determining the target beam covering a network location area in the set of network location areas based on a third correspondence between the transmitted beam and the network location area it covers, and obtaining the target beam set, the method further includes: determining a second geographical location of the access device; determining a target geographical area covered by each of the transmitted beams according to the second geographical location and the direction of each of the transmitted beams; establishing the third correspondence based on the target geographical areas covered by each of the beams and a first correspondence, wherein the first correspondence includes a correspondence between geographical areas and network location areas, and the access device stores the first correspondence.

[0016] In an exemplary embodiment, establishing the third correspondence based on the target geographic region covered by each of the beams and the first correspondence includes: determining the target network location region corresponding to the target geographic region in the first correspondence; establishing the correspondence between the beams covering the target geographic region and the target network location region to obtain the third correspondence.

[0017] In one exemplary embodiment, the access device is movable, and the network location area covered by the beam emitted by the access device changes as the access device moves, and the third correspondence is updated as the network location area covered by the beam changes.

[0018] In one exemplary embodiment, performing a group call operation on at least one terminal device through the target beam set includes: scheduling transmission resources for each of the target beams so that the target beams send paging messages to terminal devices within the network location area they cover.

[0019] In one exemplary embodiment, the network location region is a tracking region.

[0020] In one exemplary embodiment, the access device is a base station, which is deployed on an airborne mobile platform and moves with the airborne mobile platform.

[0021] According to another embodiment of the present invention, a group call method in trunked communication is provided, applied to a terminal device, comprising: determining the geographical location of the terminal device and reporting the geographical location to the core network; or, determining the geographical location of the terminal device, determining the network location area of ​​the terminal device based on the geographical location, and reporting the network location area to the core network.

[0022] In an exemplary embodiment, determining the network location area of ​​the terminal device based on the geographical location includes: determining the network location area corresponding to the geographical location in a first correspondence relationship, wherein the first correspondence relationship includes a correspondence relationship between geographical areas and network location areas, and the terminal device stores the first correspondence relationship.

[0023] In one exemplary embodiment, the method further includes: receiving a configuration message from the core network, wherein the configuration message includes reporting condition configuration information.

[0024] According to another embodiment of the present invention, a group call system in trunking communication is provided, including: a core network, an access device, and a terminal device as described above.

[0025] According to yet another embodiment of the present invention, a computer-readable storage medium is also provided, wherein a computer program is stored therein, wherein the computer program, when executed by a processor, implements the steps of the method described in any of the preceding claims.

[0026] According to yet another embodiment of the present invention, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0027] According to yet another embodiment of the present invention, a computer program product is also provided, comprising a computer program that, when executed by a processor, implements the steps of the method described in any of the preceding claims.

[0028] According to yet another embodiment of the present invention, a computer program product is also provided, including computer instructions that, when executed by a processor, implement the steps of the method described in any of the preceding claims.

[0029] Through this invention, the core network determines a target paging group, which includes N terminal devices, where N is an integer greater than or equal to 1; based on the network location areas of the N terminal devices, M access devices are determined, where M is an integer greater than or equal to 1, and the M access devices can cover the network location areas of all terminal devices in the target paging group; a group call message is sent to each access device, enabling the access devices to perform group call operations on the target paging group. Therefore, this invention solves the problem in related technologies where beam selection is impossible when the base station is moving, achieving the effect of performing group calls on terminals using the beam selected by the mobile base station. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a non-terrestrial network according to an embodiment of the present invention;

[0031] Figure 2 This is a flowchart of a group call method according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of a group call according to an embodiment of the present invention;

[0033] Figure 4 This is a step diagram according to an embodiment of the present invention. Detailed Implementation

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0036] Figure 1 This is a schematic diagram of a non-terrestrial network according to an embodiment of the present invention, such as... Figure 1 As shown, the non-terrestrial network includes satellite-based base stations, terminal equipment, gateway stations, and the core network. Satellite-based base stations are base stations deployed on airborne mobile platforms, such as satellites. The satellites on which the base stations are deployed can be low-Earth orbit (LEO), medium-Earth orbit (MEO), or high-Earth orbit (HEO).

[0037] This embodiment provides a group call method for trunking communication operating in the aforementioned non-terrestrial network, applied to the core network. Figure 2 This is a flowchart of a group call method in trunked communication according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps:

[0038] Step S202: Determine the target paging group, wherein the target paging group includes N terminal devices, and N is an integer greater than or equal to 1;

[0039] The terminal devices included in the target paging group are the terminal devices to be paging.

[0040] Step S204: Determine M access devices based on the network location areas of the N terminal devices, where M is an integer greater than or equal to 1, and the M access devices can cover the network location areas of all the terminal devices in the target paging group;

[0041] The network location area is the tracking area. The access device is a base station, which is deployed on an airborne mobile platform and moves with the airborne mobile platform. For example, it could be a spaceborne base station (a base station deployed on a satellite).

[0042] The access device transmits multiple beams, at least one of which covers any one or more network location areas among N terminal devices, so that the access device selects a target beam from its transmitted beams to perform the group call operation to the network location area it covers.

[0043] For example, determining M access devices based on the network location areas of N terminal devices includes: determining the access devices covering the network location areas in a second correspondence relationship, wherein the second correspondence relationship includes the correspondence relationship between each access device and the network location area it covers, the core network stores the second correspondence relationship, the access devices are movable, and the second correspondence relationship is updated as the network location area covered by the access devices changes.

[0044] Step S206: Send a group call message to each of the access devices so that the access devices perform a group call operation on the target paging group.

[0045] For example, taking the group call message sent to a target access device (the target access device is any one of the M access devices) as an example, the group call message carries a set of network location areas, which is the union of the network location areas of all the terminal devices in the target paging group, or the set of network location areas is the union of the network location areas of the terminal devices covered by the target access device.

[0046] In one exemplary embodiment, before determining the M access devices based on the network location regions of the N terminal devices, the method further includes:

[0047] The system receives the network location area reported by the terminal device; or, it receives a first geographical location reported by the terminal device and determines the network location area of ​​the terminal device based on the first geographical location. Specifically, the network location area corresponding to the first geographical location is determined in a first correspondence relationship, wherein the first correspondence relationship includes a correspondence relationship between geographical areas and network location areas, and the core network stores the first correspondence relationship.

[0048] The core network can determine the tracking area where each terminal is located based on the geographical location reported by each terminal; the core network then compiles a tracking area list of the tracking areas where each terminal device is located.

[0049] The TA (Tracking Area) region is mapped to a geographic region to obtain the first correspondence mentioned above. The core network stores the first correspondence and determines the base stations serving each tracking region in the tracking area list based on the first correspondence. The core network then sends the TA list to each base station.

[0050] The aforementioned tracking area is a specific area covered by the satellite in space, also known as the coverage area. This tracking area includes the geographical location of the terminal and its surrounding area. The satellite periodically updates information about this area to ensure that the base station and the terminal can maintain communication within the tracking area. The Track Area (TA) list is generated by the core network during group call setup. Based on the terminal devices in the target paging group (which includes information about the terminal devices to be paging), and combined with real-time tracking area information for each terminal device, the core network creates a list of tracking areas (TA) for the entire group call. This list ensures that the TA list includes the tracking area of ​​each terminal device to be paging.

[0051] The locations reported by the aforementioned terminals are their geographical locations. These terminals themselves have location update reporting functions, so the core network can be used to configure the terminals to report terminal location information periodically, or to report terminal location information based on location changes.

[0052] In one exemplary embodiment, when the number of access devices serving the tracking areas in the tracking area list is M, the core network sends the tracking area list to each of the M access devices.

[0053] In this context, an access device can cover one or more TA areas, and a TA area can be covered by one or more access devices. For example, when the group call TA area is too large to be fully covered by a single access device, the trunking core network will send the group call setup message to multiple access devices that can provide downlink point-to-multipoint transmission for the TA area.

[0054] During the group call setup process, the core network sends the TA list of the group call area to the access equipment. The access equipment then determines the target TA area for the group call downlink point-to-multipoint transmission based on the core network TA list. For example... Figure 3 This is a schematic diagram of a group call according to an embodiment of the present invention, such as... Figure 3 As shown, TA1 and TA2 are the aforementioned tracking areas. Beams 1 and 2 transmitted by the base station (left) cover TA1, and beams 5 and 6 transmitted by the base station (right) cover TA2. Therefore, the core network transmits TA1 and TA2 to the aforementioned left and right base stations respectively.

[0055] Through the above steps, the core network determines the target paging group, which includes N terminal devices, where N is an integer greater than or equal to 1; based on the network location areas of the N terminal devices, it determines M access devices, where M is an integer greater than or equal to 1, and the M access devices can cover the network location areas of all terminal devices in the target paging group; a group call message is sent to each access device, enabling the access devices to perform group call operations on the target paging group. Therefore, the problem of beam selection being impossible when the base station is moving in related technologies can be solved, achieving the effect of performing group calls on terminals using the beam selected by the mobile base station.

[0056] According to another embodiment of the present invention, a group call method in trunked communication is provided, applied to an access device, which is a base station deployed on an airborne mobile platform and moves with the airborne mobile platform. For example, the access device may be a satellite-borne base station deployed on a satellite. The satellite deploying the base station may be a low-Earth orbit satellite, a medium-Earth orbit satellite, or a high-Earth orbit satellite. The core network can determine the base station serving each tracking area based on an ephemeris table, which records, but is not limited to, satellite movement trajectories, satellite positions, tables or charts of satellite movement, etc. The method includes the following steps:

[0057] Step S302: Receive a group call message sent by the core network, wherein the group call message carries a set of network location areas;

[0058] The set of network location regions is either the union of the network location regions of all terminal devices in the target paging group, or the union of the network location regions of the terminal devices covered by the target access device. The target paging group comprises N terminal devices, where N is an integer greater than or equal to 1.

[0059] The aforementioned network location area is a tracking area. The aforementioned group call message carries a set of network location areas, which can be the union of the network location areas of all the terminal devices in the target paging group in the above embodiments, or the set of network location areas can be the union of the network location areas of the terminal devices covered by the access device.

[0060] Step S304: Based on the third correspondence between the transmitted beam and the network location area it covers, determine the target beam that covers the network location area in the set of network location areas, and obtain the target beam set, wherein the access device stores the third correspondence;

[0061] Specifically, the target tracking area covered by the access device is determined in the network location area of ​​at least one terminal device included in the group call message; the beams in the third correspondence that have the correspondence with the target tracking area are determined as target beams, thus obtaining a target beam set.

[0062] Step S306: Perform a group call operation on at least one terminal device through the target beam set.

[0063] Specifically, transmission resources are scheduled for each of the target beams so that the target beams can send paging messages to terminal devices within the network location area they cover.

[0064] In an exemplary embodiment, before determining the target beam covering a network location area in the set of network location areas based on a third correspondence between the transmitted beam and the network location area it covers, and obtaining the target beam set, the method further includes: determining a second geographical location of the access device; determining a target geographical area covered by each of the transmitted beams according to the second geographical location and the direction of each of the transmitted beams; establishing the third correspondence based on the target geographical areas covered by each of the beams and a first correspondence, wherein the first correspondence includes a correspondence between geographical areas and network location areas, and the access device stores the first correspondence.

[0065] Specifically, establishing the third correspondence based on the target geographical area covered by each of the beams and the first correspondence includes:

[0066] In the first correspondence, the target network location area corresponding to the target geographical area is determined; the correspondence between the beam covering the target geographical area and the target network location area is established to obtain the third correspondence.

[0067] The base station pre-stores a first correspondence between TA areas and geographical areas, and determines the target network location area (hereinafter referred to as the target TA area) that the base station can serve based on its own location (second geographical location). The base station searches for the corresponding network location area in the first correspondence based on the geographical area covered by its transmitted beam, and establishes a third correspondence between the beam and the network location area.

[0068] In one exemplary embodiment, the access device is movable, and the network location area covered by the beam emitted by the access device changes as the access device moves, and the third correspondence is updated as the network location area covered by the beam changes.

[0069] In this cluster system, there is a correspondence between TA areas and geographical areas (the first correspondence). The base station pre-stores this first correspondence and determines the TA areas it can serve based on its own location information. Since the base station itself may move with the airborne platform, the correspondence between the base station's transmitted beam and the TA areas may change. The base station can estimate the ground coverage of its transmitted beam based on its own location and the direction of its transmitted beam, thereby determining the correspondence between the TA areas and the base station's transmitted beam.

[0070] by Figure 3 For example, beams 1 and 2 transmitted by the base station (left) correspond to TA1, beams 3 and 4 transmitted by the base station (left) correspond to TA2, beams 5 and 6 transmitted by the base station (right) correspond to TA3, and beams 7 and 8 transmitted by the base station (right) correspond to TA4.

[0071] Specifically, the base station determines the target tracking area served by the base station in the tracking area list; the base station determines the target beam set in the beams transmitted by the base station according to the correspondence between the target tracking area and the beams transmitted by the base station.

[0072] by Figure 3 For example, the group call TA area list sent by the core network to the base station includes TA1 and TA3. The base station calculates and determines that they correspond to beams 1 and 2 and beams 5 and 6 respectively. Therefore, the base station only needs to schedule the target beams 1, 2, 5, and 6 to form the target beam set transmission resources for group call downlink point-to-multipoint transmission.

[0073] According to another embodiment of the present invention, a group call method in trunked communication is provided, applied to a terminal device, comprising the following steps: determining the geographical location of the terminal device and reporting the geographical location to the core network; or, determining the geographical location of the terminal device, determining the network location area of ​​the terminal device based on the geographical location, and reporting the network location area to the core network.

[0074] In one exemplary embodiment, the terminal device reports its geographical location to the core network, and the core network determines the network location area corresponding to the geographical location based on a first correspondence. Alternatively, the terminal device may store the aforementioned first correspondence, and determine its network location area based on its own geographical location and the first correspondence.

[0075] Specifically, the terminal device can determine the network location area in the following way: determine the network location area corresponding to the geographical location in a first correspondence relationship, wherein the first correspondence relationship includes the correspondence relationship between geographical areas and network location areas, and the terminal device saves the first correspondence relationship.

[0076] In one exemplary embodiment, the method further includes: receiving a configuration message from the core network, wherein the configuration message includes reporting condition configuration information.

[0077] The reporting condition configuration information is used to instruct the terminal device on the conditions for reporting its geographical location or network location area, including but not limited to:

[0078] The device reports its geographical location to the core network every first preset period; or, if the geographical location of the terminal device changes, the device reports the changed geographical location to the core network.

[0079] The network location area is reported to the core network every second preset period; or, if the network location area of ​​the terminal device changes, the changed network location area of ​​the terminal device is reported to the core network.

[0080] According to another embodiment of the present invention, a group call system in trunking communication is provided, including: a core network, an access device, and a terminal device as described above.

[0081] Figure 4 This is a step diagram according to an embodiment of the present invention, such as... Figure 4 As shown, this step includes the following:

[0082] S401, the base station determines the correspondence between the geographical area covered by its transmitted beam and the tracking area (TA area) (first correspondence).

[0083] S402, set the trigger conditions and reporting method for the cluster terminal (terminal equipment of the target paging group) to report the geographical location. The trigger conditions for reporting the geographical location include periodic reporting or reporting when the geographical location changes. The reporting method can adopt the geographical location reporting method in the prior art. Alternatively, set the trigger conditions and reporting method for the cluster terminal to report the tracking area. The trigger conditions for reporting the tracking area include periodic reporting or reporting when the tracking area changes. The reporting method can adopt the reporting method in the prior art.

[0084] S403, the cluster core network stores the TA tracking area of ​​the cluster terminal;

[0085] S404, During the trunking group call service, the trunking core network sends the list of trunking terminals forming TA areas to each base station.

[0086] S405: The base station determines the target beam for downlink point-to-multipoint transmission based on the correspondence between the geographical area covered by the beam and the TA area, and then uses the target beam to paging the trunking terminal.

[0087] The method of selecting group call beams through the base station in the data transmission of group calls in this application fills a gap in the prior art, effectively improving the spectrum utilization rate of the system and the efficiency of base station transmit power utilization, and further expanding the group call capacity of wide-baseline trunking systems in multi-beam wireless communication systems. It solves the problem in related technologies where beam selection is impossible when the base station is moving, achieving the effect of group calling terminals through the beam selected by the mobile base station.

[0088] Optionally, the entity performing the above steps may be a background processor or other devices with similar processing capabilities, or a machine that integrates at least an image acquisition device and a data processing device. The image acquisition device may include an image acquisition module such as a camera, and the data processing device may include a terminal such as a computer or a mobile phone, but is not limited thereto.

[0089] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0090] This embodiment also provides a group call system, including the core network, access equipment, and terminal equipment described in the above embodiments. This system is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0091] It should be noted that the above systems can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above systems are located in the same processor; or, the above systems are located in different processors in any combination.

[0092] Embodiments of the present invention also provide a computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of the method described in any of the preceding claims.

[0093] In one exemplary embodiment, the aforementioned computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard disk, magnetic disk, or optical disk.

[0094] Embodiments of the present invention also provide an electronic device including a memory and a processor, the memory storing a computer program and the processor being configured to run the computer program to perform the steps in any of the above method embodiments.

[0095] In one exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0096] Specific examples in this embodiment can be found in the examples described in the above embodiments and exemplary implementations, and will not be repeated here.

[0097] Embodiments of the present invention also provide a computer program product, including a computer program that, when executed by a processor, implements the steps of the methods described in various embodiments of the present application.

[0098] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0099] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A group call method in trunked radio communication, characterized in that, Applied to the core network, including: Determine the target paging group, wherein the target paging group includes N terminal devices, where N is an integer greater than or equal to 1; Based on the network location regions of N terminal devices, M access devices are determined, where M is an integer greater than or equal to 1. The M access devices can cover the network location regions of all terminal devices in the target paging group. The core network stores the network location regions of the target paging group. A group call message is sent to each of the access devices so that the access devices can perform a group call operation on the target paging group, wherein the group call message carries a set of network location areas.

2. The method according to claim 1, characterized in that, Before determining the M access devices based on the network location areas of the N terminal devices, the method further includes: Receive the network location area reported by the terminal device; or... Receive the first geographical location reported by the terminal device, and determine the network location area of ​​the terminal device based on the first geographical location.

3. The method according to claim 2, characterized in that, Determining the network location area of ​​the terminal device based on the first geographical location includes: The network location region corresponding to the first geographical location is determined in the first correspondence relationship, wherein the first correspondence relationship includes the correspondence relationship between geographical regions and network location regions, and the core network stores the first correspondence relationship.

4. The method according to claim 1, characterized in that, Based on the network location regions of the N terminal devices, M access devices are determined, including: The access devices covering the network location area are determined in the second correspondence relationship, wherein the second correspondence relationship includes the correspondence relationship between each access device and the network location area it covers, the core network stores the second correspondence relationship, the access devices are movable, and the second correspondence relationship is updated as the network location area covered by the access devices changes.

5. The method according to claim 1, characterized in that, Sending group call messages to each of the access devices, including: The group call message is sent to the target access device, wherein the target access device is any one of the M access devices, and the group call message carries a set of network location areas, which is the union of the network location areas of all the terminal devices in the target paging group, or the set of network location areas is the union of the network location areas of the terminal devices covered by the target access device.

6. The method according to any one of claims 1 to 5, characterized in that, The access device transmits multiple beams, at least one of which covers the network location area, so that the access device selects a target beam from among the multiple beams it transmits to perform the group call operation to the network location area it covers.

7. The method according to any one of claims 1 to 5, characterized in that, The network location region is the tracking region.

8. The method according to any one of claims 1 to 5, characterized in that, The access device is a base station, which is deployed on an airborne mobile platform and moves with the airborne mobile platform.

9. A group call method in trunked radio communication, characterized in that, Applied to access devices, including: Receive a group call message sent by the core network, wherein the group call message carries a set of network location areas; Based on the third correspondence between the transmitted beam and the network location area it covers, the target beam covering the network location area in the set of network location areas is determined, and the target beam set is obtained, wherein the access device stores the third correspondence. A group call operation is performed on at least one terminal device using the target beam set; The core network is used to determine M access devices based on the network location areas of N terminal devices included in the target paging group, where N is an integer greater than or equal to 1, M is an integer greater than or equal to 1, and the M access devices can cover the network location areas of all terminal devices in the target paging group. The core network stores the network location areas of the target paging group. The core network sends group call messages to each access device so that the access devices can perform group call operations on the target paging group.

10. The method according to claim 9, characterized in that, Based on the third correspondence between the transmitted beam and the network location area it covers, the target beam covering the network location area in the set of network location areas is determined, resulting in a target beam set, including: Determine the target tracking area covered by the access device from the set of network location areas; The beams that have the corresponding relationship with the target tracking area in the third correspondence are identified as target beams, thus obtaining the target beam set.

11. The method according to claim 9, characterized in that, Before determining the target beam covering the network location area in the set of network location areas based on the third correspondence between the transmitted beam and the network location area it covers, and obtaining the target beam set, the method further includes: Determine the second geographical location of the access device; Based on the second geographical location and the direction of each of the emitted beams, the target geographical area covered by each of the beams is determined. The third correspondence is established based on the target geographical area covered by each of the beams and the first correspondence, wherein the first correspondence includes the correspondence between geographical areas and network location areas, and the access device stores the first correspondence.

12. The method according to claim 11, characterized in that, The third correspondence is established based on the target geographical area covered by each of the beams and the first correspondence, including: In the first correspondence, determine the target network location region corresponding to the target geographical region; Establish a correspondence between the beams covering the target geographical area and the target network location area to obtain the third correspondence.

13. The method according to any one of claims 9 to 12, characterized in that, The access device is movable, and the network location area covered by the beam emitted by the access device changes as the access device moves. The third correspondence is updated as the network location area covered by the beam changes.

14. The method according to claim 9, characterized in that, Performing a group call operation on at least one terminal device through the target beam set includes: Transmission resources are scheduled for each of the target beams so that the target beams send paging messages to terminal devices within the network location area they cover.

15. The method according to claim 9, characterized in that, The network location region is the tracking region.

16. The method according to claim 9, characterized in that, The access device is a base station, which is deployed on an airborne mobile platform and moves with the airborne mobile platform.

17. A group call system in trunked radio communication, characterized in that, include: The core network is used to determine a target paging group, wherein the target paging group includes N terminal devices, where N is an integer greater than or equal to 1; based on the network location areas of the N terminal devices, M access devices are determined, where M is an integer greater than or equal to 1, and the M access devices can cover the network location areas of all the terminal devices in the target paging group; the core network stores the network location areas of the target paging group; and a group call message is sent to each of the access devices to enable the access devices to perform a group call operation on the target paging group, wherein the group call message carries a set of network location areas. An access device is configured to receive a group call message sent by the core network, wherein the group call message carries a set of network location areas; based on a third correspondence between the transmitted beam and the network location areas it covers, a target beam covering the network location areas in the set of network location areas is determined to obtain a target beam set, wherein the access device stores the third correspondence; and a group call operation is performed on at least one terminal device through the target beam set. A terminal device is configured to determine the geographical location of the terminal device and report the geographical location to the core network; or, to determine the geographical location of the terminal device, determine the network location area of ​​the terminal device based on the geographical location, and report the network location area to the core network.

18. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, wherein the computer program, when executed by a processor, implements the steps of the method described in any one of claims 1 to 8 or 9 to 16.

19. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to run the computer program to perform the method as described in any one of claims 1 to 8 or 9 to 16.

20. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method described in any one of claims 1 to 8 or 9 to 16.

Images