Access method and device of non-terrestrial network logic cell

Abstract

The invention discloses an access method and device for a non-terrestrial network logic cell. The method comprises the steps that a system message of a non-terrestrial network NTN is acquired, the system message is broadcasted to a terminal by the NTN according to a preset period, the system message at least comprises a system information block SIB recording a newly-added field, and the newly-added field is used for recording information related to the coverage range of an NTN logic cell; determining the coverage range of the NTN logic cell according to the information recorded in the newly added field; determining whether the terminal is located in the coverage area according to the current position of the terminal and the coverage area of the NTN logic cell; and when the terminal is located in the coverage range, determining that the NTN logic cell is allowed to access, and when the terminal is not located in the coverage range, determining that the NTN logic cell is not allowed to access. According to the invention, the technical problem that the terminal cannot access the non-ground network virtual cell based on the related technology is solved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a method and device for accessing a non-terrestrial network logical cell. Background Art

[0002] The coverage of a satellite beam is highly correlated with the satellite. In related technologies, the concept of an NTN virtual cell is proposed. The NTN virtual cell is used to further divide the specific service scope of a non-terrestrial network based on the coverage of a satellite physical beam. However, there is no method for a terminal to access an NTN virtual cell in related technologies.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present application provide a method and device for accessing a non-terrestrial network logical cell, so as to at least solve the technical problem that a terminal cannot access a non-terrestrial network virtual cell based on related technologies.

[0005] According to one aspect of an embodiment of the present application, a method for accessing a non-terrestrial network logical cell is provided, including: obtaining a system message of a non-terrestrial network NTN, wherein the system message is broadcast by the NTN to a terminal according to a preset period, and the system message includes at least a system information block SIB recording a newly added field, and the newly added field is used to record information related to the coverage range of the NTN logical cell; determining the coverage range of the NTN logical cell according to the information recorded in the newly added field; determining whether the terminal is located within the coverage range according to the current location of the terminal and the coverage range of the NTN logical cell; if the terminal is located within the coverage range, determining that the NTN logical cell is allowed to access, and if the terminal is not located within the coverage range, determining that the NTN logical cell is not allowed to access.

[0006] Optionally, the newly added field includes description information of the geometric figure, the description information is used to determine the coverage of the NTN logical cell, and the description information includes multiple target points in the geometric figure, wherein the target point is a point among the multiple points contained in the geometric figure used to determine the coverage area corresponding to the geometric figure; information related to the coverage of the NTN logical cell, including: location parameters of each target point, the location parameters including: longitude value, latitude value, length value of a radius starting from the target point, and angle value of an angle between a ray starting from the target point and a reference ray; the newly added field includes multiple key fields corresponding to the NTN logical cell one by one, each key field including: a first type field for recording a longitude value, a second type field for recording a latitude value, a third type field for recording a length value, and a fourth type field for recording an angle value; determining the coverage of the NTN logical cell according to the information recorded in the newly added field, including: determining values ​​of different key fields, wherein the value of each key field is an actual value of the location parameter recorded by the key field; and determining the coverage of the NTN logical cell according to the value.

[0007] Optionally, determining the coverage of the NTN logical cell according to the value includes: determining the shape of the NTN logical cell according to the value of the third type of field, wherein the shape includes: a first type of geometric figure including an arc, and a second type of geometric figure not including an arc; and determining the coverage of the NTN logical cell according to a coverage determination strategy corresponding to the shape.

[0008] Optionally, the shape of the NTN logical cell is determined according to the value of the third category field, including: when the value of all the third category fields included in the newly added field is 0, the shape of the NTN logical cell is determined to be a first category geometric figure; when the value of at least one third category field included in the newly added field is not 0, the shape of the NTN logical cell is determined to be a second category geometric figure.

[0009] Optionally, the coverage of the NTN logical cell is determined according to a coverage determination strategy corresponding to the shape, wherein, when the shape is a first type of geometric figure, the coverage of the NTN logical cell is determined according to the first strategy, including: for each key field, determining the target point corresponding to each key field according to the value of the first type of field and the value of the second type of field, wherein the number of target points is the same as the number of key fields; connecting multiple target points with straight lines to obtain a first closed figure; and determining the interior of the first closed figure as the coverage of the NTN logical cell.

[0010] Optionally, the coverage of the NTN logical cell is determined according to a coverage determination strategy corresponding to the shape, wherein, when the shape is a second type of geometric figure, the coverage of the NTN logical cell is determined according to the second strategy, including: determining the target key field to which the third type field whose value is not 0 belongs; determining the arc corresponding to the target key field according to the value of the third type field and the value of the fourth type field contained in the target key field; using straight lines to connect the arc and multiple target points corresponding to the remaining key fields into a second closed figure, wherein the remaining key fields are key fields other than the target key fields in all key fields contained in the newly added fields; and determining the interior of the second closed figure as the coverage of the NTN logical cell.

[0011] Optionally, the current position includes: the longitude value of the terminal and the latitude value of the terminal. Determining whether the terminal is within the coverage range according to the current position of the terminal and the coverage range of the NTN logical cell includes: determining the test point for representing the terminal according to the longitude value and the latitude value; determining any straight line passing through the test point as the target straight line; determining the number of intersections of the target straight line with the geometric figure when the target straight line passes through the geometric figure; when the value of the number is an odd number, determining that the terminal is within the coverage range; when the value of the number is an even number, determining that the terminal is not within the coverage range.

[0012] According to another aspect of an embodiment of the present application, a method for accessing a non-terrestrial network logical cell is also provided, including: recording information related to the coverage of the non-terrestrial network NTN in a newly added field, and adding the newly added field to a system information block SIB, wherein the SIB is included in a system message of the NTN; broadcasting the system message to the terminal at a preset period.

[0013] According to another aspect of an embodiment of the present application, an access device for a non-terrestrial network logical cell is also provided, including: an acquisition module, used to acquire a system message of a non-terrestrial network NTN, wherein the system message is broadcast by the NTN to a terminal according to a preset period, and the system message includes at least a system information block SIB recording a newly added field, and the newly added field is used to record information related to the coverage range of the NTN logical cell; a first determination module, used to determine the coverage range of the NTN logical cell according to the information recorded in the newly added field; a second determination module, used to determine whether the terminal is located within the coverage range according to the current location of the terminal and the coverage range of the NTN logical cell; a third determination module, used to determine that the NTN logical cell is allowed to access if the terminal is within the coverage range, and to determine that the NTN logical cell is not allowed to access if the terminal is not within the coverage range.

[0014] According to another aspect of an embodiment of the present application, a non-volatile storage medium is also provided, in which a computer program is stored, wherein the above-mentioned method for accessing a non-terrestrial network logical cell is executed by running the computer program on a device where the non-volatile storage medium is located.

[0015] According to another aspect of an embodiment of the present application, an electronic device is also provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to execute the above-mentioned non-terrestrial network logical cell access method through the computer program.

[0016] According to another aspect of an embodiment of the present application, a computer program product is also provided, including computer instructions, which implement the steps of the above-mentioned non-terrestrial network logical cell access method when executed by a processor.

[0017] In the embodiment of the present application, a system message of a non-terrestrial network NTN is obtained, wherein the system message is broadcasted by the NTN to the terminal according to a preset period, and the system message includes at least a system information block SIB recording a newly added field, and the newly added field is used to record information related to the coverage range of the NTN logical cell; the coverage range of the NTN logical cell is determined according to the information recorded in the newly added field; whether the terminal is located within the coverage range is determined according to the current location of the terminal and the coverage range of the NTN logical cell; when the terminal is within the coverage range, it is determined that the NTN logical cell is allowed to access, and when the terminal is not within the coverage range, it is determined that the NTN logical cell is not allowed to access. By writing relevant information used to describe the coverage range of the NTN virtual cell (i.e., the NTN logical cell) into the system information of the non-terrestrial network, the purpose of informing the terminal of the coverage range of the NTN logical cell when the network side transmits the system message to the terminal by broadcasting is achieved, thereby achieving the technical effect that the terminal knows the coverage range of the NTN logical cell by receiving the system message broadcasted by the network side, and further achieving the technical effect of assisting the terminal to determine the accessible NTN logical cell, thereby solving the technical problem that the terminal cannot access the non-terrestrial network virtual cell based on the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 is a schematic diagram of a communication system 100 according to an embodiment of the present application;

[0020] Figure 2is a flowchart of a method for accessing a non-terrestrial network logical cell according to an embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of an application scenario in which a terminal determines that it can access an NTN logical cell according to an embodiment of the present application;

[0022] Figure 4 is a system information block including the coverage of an NTN logical cell according to an embodiment of the present application;

[0023] Figure 5 is a schematic diagram of a second type of geometric figure according to an embodiment of the present application;

[0024] Figure 6 is a flowchart of another method for accessing a non-terrestrial network logical cell according to an embodiment of the present application;

[0025] Figure 7 It is a structural diagram of an access device for a non-terrestrial network logical cell according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] In order to better understand the embodiments of the present application, the technical terms involved in the embodiments of the present application are explained as follows:

[0029] Non-terrestrial network: A network that transmits communications through non-terrestrial devices such as satellites, airships, and high-altitude drones. This type of network can cover a wide geographical area and achieve global communication coverage. It is suitable for special environments such as remote areas, oceans, and aerospace. Non-terrestrial networks can provide high-speed, low-latency communication services.

[0030] NTN virtual cell (NTN logical cell): a logical network area of ​​a non-terrestrial network. An NTN logical cell usually consists of one or more non-terrestrial devices that communicate with user equipment via wireless connections.

[0031] In the related art, the coverage of the satellite beam is related to the satellite height. The communication standard (R17 23737) defines the coverage of the satellite beam and the satellite height as follows: When the height of the satellite increases, the size of the beam will increase accordingly, because the diameter of the satellite antenna is subject to technical limitations. The beam radius range can range from tens of kilometers for low-earth orbit satellites to hundreds of kilometers for medium-earth orbit or high-earth orbit satellites. The communication standard also proposes the concept of NTN virtual cells (i.e., NTN logical cells). For the NTN system, it can be found that the coverage of some low-orbit satellite communication systems overlaps with the coverage of ground mobile communication systems, that is, some low-orbit satellite communication systems can reach the coverage of ground mobile communication systems. Similarly, some drone communication systems can reach the coverage of ground mobile communication systems. Therefore, when supporting the NTN system, how the terminal accesses the NTN system becomes an urgent problem to be solved. The related art does not propose a method for the terminal to access the NTN logical cell. Therefore, there is a problem that the terminal cannot know the coverage of the NTN logical cell and cannot access the NTN logical cell. In order to solve this problem, a relevant solution is provided in the embodiment of the present application, which is described in detail below.

[0032] According to an embodiment of the present application, a method embodiment of a method for accessing an enclave ground logical cell is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that shown here.

[0033] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system or 5G system, etc.

[0034] For example, the communication system 100 used in the embodiment of the present application is as follows: Figure 1 As shown. The communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or referred to as a communication terminal or terminal). The network device 110 may provide communication coverage for a specific geographical area, and may communicate with terminal devices located in the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

[0035] The communication system 100 also includes at least one terminal device 120 located within the coverage of the network device 110. As used herein, "terminal device" includes but is not limited to connection via a wired line, such as via a Public Switched Telephone Networks (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as, for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and / or a device of another terminal device configured to receive / send communication signals; and / or an Internet of Things (IoT) device. A terminal device configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communications capabilities; PDAs that may include radiotelephones, pagers, Internet / Intranet access, Web browsers, notepads, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A terminal device may refer to an access terminal, user equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

[0036] Optionally, device to device (D2D) communication may be performed between the terminal devices 120 .

[0037] Optionally, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

[0038] The embodiment of the present application provides a method for accessing a non-terrestrial network logical cell that can be applied in the above-mentioned operating environment. Figure 2 is a flowchart of the steps of a method for accessing a non-terrestrial network logical cell provided in an embodiment of the present application, such as Figure 2 As shown, the method comprises the following steps:

[0039] Step S202, obtaining a system message of a non-terrestrial network NTN, wherein the system message is broadcasted by the NTN to the terminal according to a preset period, and the system message at least includes a system information block SIB recording a newly added field, and the newly added field is used to record information related to the coverage of the NTN logical cell.

[0040] The method provided in the embodiment of the present application can be used to assist the terminal in determining the coverage of the NTN logical cell, and further determine the accessible NTN logical cell according to the coverage of the NTN logical cell. Specifically, Figure 3 : is a schematic diagram of an application scenario in which a terminal determines that it can access an NTN logical cell. The method provided in the embodiment of the present application can be applied in the following cases: Figure 3 In the two scenarios (Case 1 and Case 2) shown in Figure 3As shown, when the terminal device is located in the intersection area of ​​the coverage of two non-terrestrial network network beams (such as beam A and beam B) (scenario Case 1), the terminal can determine whether there is an accessible NTN logical cell and which NTN logical cell to access by the method provided in the embodiment of the present application; when the signals covering the terminal are all signals sent by a non-terrestrial network beam (such as beam A) (scenario Case 2), the terminal can also use the embodiment of the present application to determine the coverage of the NTN logical cell of the beam, and further determine whether the NTN logical cell of the beam can be accessed. In step S202, the terminal can determine the coverage of the NTN logical cell based on the received system message of the non-terrestrial network. Therefore, the network side of the non-terrestrial network adds a field (i.e., a newly added field) in the system message for recording information related to the coverage of the NTN logical cell. Specifically, this newly added field is written into the system information block (System Information Block, SIB). The network side of the non-terrestrial network sends system messages to the terminal by broadcasting, wherein, in the absence of special circumstances, the network side of the non-terrestrial network periodically broadcasts system messages so as to timely update the relevant information of the non-terrestrial network to the terminal, wherein the period followed when periodically broadcasting system messages can be preset (preset period); the above-mentioned special circumstances include: the first access of the terminal (when the terminal is turned on for the first time or enters the NTN coverage area, the NTN will broadcast a system message), important event notification (when the network is maintained or the configuration is changed, the NTN notifies the terminal of these important events by broadcasting system messages, and notifies the terminal to take corresponding actions), user equipment capability query (NTN inquires about the terminal's capabilities and configuration by broadcasting system messages), etc.

[0041] Step S204: determine the coverage of the NTN logical cell according to the information recorded in the newly added field.

[0042] Since the field for recording information related to the coverage of the NTN logical cell (ie, the newly added field) is written in the SIB, in step S204, after receiving the system message, the terminal determines the coverage of the NTN logical cell according to the newly added field in the SIB.

[0043] Optionally, the newly added field includes description information of the geometric figure, the description information is used to determine the coverage of the NTN logical cell, and the description information includes multiple target points in the geometric figure, wherein the target point is a point among the multiple points contained in the geometric figure used to determine the coverage area corresponding to the geometric figure; information related to the coverage of the NTN logical cell, including: location parameters of each target point, the location parameters including: longitude value, latitude value, length value of a radius starting from the target point, and angle value of an angle between a ray starting from the target point and a reference ray; the newly added field includes multiple key fields corresponding to the NTN logical cell one by one, each key field including: a first type field for recording a longitude value, a second type field for recording a latitude value, a third type field for recording a length value, and a fourth type field for recording an angle value; determining the coverage of the NTN logical cell according to the information recorded in the newly added field, including: determining values ​​of different key fields, wherein the value of each key field is an actual value of the location parameter recorded by the key field; and determining the coverage of the NTN logical cell according to the value.

[0044] Figure 4 It is a system information block containing the coverage of the NTN logical cell. In the related technology, the system information block (SIB) is usually used to record satellite ephemeris information, timing advance (TA) pre-compensation, frequency deviation and other NTN network access parameters, time- and location-based cell reselection measurement control information (based on time conditions, such as peak hours, off-peak hours, etc., location conditions, such as indoors, tunnels, mountainous areas, etc., measurement control parameters, such as signal quality thresholds, cell reselection time intervals, etc., cell reselection strategies defined), neighbor cell configuration information, target satellite service time (specific time period information related to satellite services, which informs the terminal when it can expect to receive satellite services, or when satellite services may be unavailable, for example, it may include satellite transit time, specific service windows, or satellite service availability schedules). Figure 4As shown, the system information block (SIB) adds a new field (Location Service) relative to the SIB in the related art, and the field is composed of at least one key field (SEQUENCE), and the information recorded in each key field (SEQUENCE) is used to describe the coverage of an NTN logical cell. In the embodiment of the present application, a geometric figure is used to define the coverage of the NTN logical cell, and the information recorded in each key field (SEQUENCE) is also the description information of the geometric figure; when a geometric figure is used to define the coverage of the NTN logical cell, the area of ​​the geometric figure can be regarded as the coverage of the NTN logical cell. If the area of ​​the geometric figure is to be determined, the shape of the geometric figure must be determined first, and the information recorded in each key field (SEQUENCE) is actually the location parameter of one or more points (i.e., target points) that can be used to determine the shape of the geometric figure. The location parameters of each target point include: longitude value and latitude value. Therefore, each key field (SEQUENCE) contains a latitude field latitude (i.e., a second type of field) and a longitude field longitude (i.e., a first type of field). Considering that there may be arcs in geometric figures, the embodiment of the present application also defines a radius length field radius (i.e., a third type of field) for recording the length value of the radius starting from the target point in the key field, and an angle field for recording the angle value between the ray starting from the target and the reference ray, wherein each key field corresponds to a reference ray, which is any one of the two rays that intersect and are perpendicular to each other with the target point whose radius field is not 0. In this embodiment, there are multiple angle fields in each key field, for example, a starting angle field (anglestart) and an ending angle field (angleend) may be included at the same time. Each newly added field contains at least one key field. When the terminal determines the coverage of the NTN logical cell according to the newly added field, the above information can be used. Specifically, when determining the coverage of each NTN logical cell, the key field corresponding to each NTN logical cell is taken, and the coverage of the NTN logical cell is determined according to the value result. The above value result is the actual value of the location parameter recorded in multiple fields (first type field, second type field, third type field, fourth type field) contained in each key field. A target point in a geometric figure corresponding to the coverage of an NTN logical cell has a longitude of 116.391, a latitude of 39.907, a radius length of 0, and an angle value related to the target point is 0. The value result of the key field SEQUENCE1{(latitude1, longitude1, radius1, anglestart1, angleend1)} used to represent this point is {(0, 0, 0, 0, 0)}.

[0045] In this embodiment, by using geometric graphics to describe information, the coverage of the NTN logical cell can be flexibly defined, not only limited to a circle or a rectangle, but also any complex shape, which is of great significance for the coverage optimization of non-terrestrial networks. For example, in a satellite network, the coverage can be optimized by adjusting the location parameters of the target point to adapt to different ground service requirements.

[0046] According to an optional embodiment of the present application, the coverage of the NTN logical cell is determined according to a value, including: determining the shape of the NTN logical cell according to the value of the third type of field, wherein the shape includes: a first type of geometric figure including an arc, and a second type of geometric figure not including an arc; and determining the coverage of the NTN logical cell according to a coverage determination strategy corresponding to the shape.

[0047] As mentioned in the above embodiment, the embodiment of the present application adopts geometric figures to define the coverage of the NTN logical cell. In this embodiment, in order to determine the coverage of the NTN logical cell, it is necessary to first determine the specific shape of the geometric figure representing the coverage of the NTN logical cell. When making a preliminary determination, first determine which of the following types the coverage representing the NTN logical cell belongs to based on the third type of field in the newly added field: a first type of geometric figure containing an arc, a second type of geometric figure not containing an arc; and then further determine the coverage of the NTN logical cell based on the coverage determination strategies corresponding to different types.

[0048] In the embodiment of the present application, different coverage range determination strategies are set according to whether the shape of the geometric figure representing the coverage range of the NTN logical cell contains an arc shape, so that the coverage range can be described more accurately, especially for scenarios where an arc boundary is required to optimize coverage, such as in satellite communications. By defining a coverage range that contains an arc, it is possible to better adapt to the curvature of the earth's surface and improve coverage efficiency.

[0049] Optionally, the shape of the NTN logical cell is determined according to the value of the third category field, including: when the value of all the third category fields included in the newly added field is 0, the shape of the NTN logical cell is determined to be a first category geometric figure; when the value of at least one third category field included in the newly added field is not 0, the shape of the NTN logical cell is determined to be a second category geometric figure.

[0050] As mentioned in the above embodiment, each key field (SEQUENCE) used to describe the coverage of each NTN logical cell includes a radius length field radius (i.e., a third type of field) for recording the length value of the radius starting from the target point. The radius field can be used to determine whether the shape of the geometric figure representing the coverage of the NTN logical cell contains an arc. Specifically, when the values ​​of all radius fields included in the newly added field are 0, it means that the shape of the geometric figure representing the coverage of the NTN logical cell does not contain an arc. At this time, the values ​​of all angle fields included in the newly added field are also 0; on the contrary, when the value of a radius field included in the newly added field is not 0, it means that the shape of the geometric figure representing the coverage of the NTN logical cell must contain an arc, and the value of the angle field included in the key field (SEQUENCE) to which the radius field having a value not of 0 belongs must also be not 0.

[0051] According to an optional embodiment of the present application, the coverage of the NTN logical cell is determined according to a coverage determination strategy corresponding to the shape, wherein, when the shape is a first type of geometric figure, the coverage of the NTN logical cell is determined according to the first strategy, including: for each key field, determining the target point corresponding to each key field according to the value of the first type of field and the value of the second type of field, wherein the number of target points is the same as the number of key fields; connecting multiple target points with a straight line to obtain a first closed figure; and determining the interior of the first closed figure as the coverage of the NTN logical cell.

[0052] In this embodiment, when it is determined that the geometric figure representing the coverage of the NTN logical cell is a figure that does not contain an arc (i.e., a first-type geometric figure), a polygonal coverage determination strategy (i.e., a first strategy) is used to determine the shape of the geometric figure representing the coverage of the NTN logical cell. Specifically, when the geometric figure representing the coverage of the NTN logical cell is a figure that does not contain an arc (i.e., a first-type geometric figure), the target points located according to the information recorded in each key field are all endpoints of the first-type geometric figure, and when there is no arc, the value of the radius field and the value of the angle field are both 0, then a point can be located according to the values ​​of the latitude field (i.e., the second-type field) and the longitude field (i.e., the first-type field); further, these target points are connected into a (first) closed figure using a Geographic Information System (GIS) algorithm, and the interior of the first closed figure is the coverage of the NTN logical cell.

[0053] According to another optional embodiment of the present application, the coverage of the NTN logical cell is determined according to the coverage determination strategy corresponding to the shape, wherein, when the shape is a second type of geometric figure, the coverage of the NTN logical cell is determined according to the second strategy, including: determining the target key field to which the third type field whose value is not 0 belongs; determining the arc corresponding to the target key field according to the value of the third type field and the value of the fourth type field contained in the target key field; using a straight line to connect the arc and multiple target points corresponding to the remaining key fields into a second closed figure, wherein the remaining key fields are the key fields other than the target key fields in all the key fields contained in the newly added fields; and determining the interior of the second closed figure as the coverage of the NTN logical cell.

[0054] In this embodiment, when it is determined that the geometric figure representing the coverage range of the NTN logical cell is a figure containing an arc (i.e., a second type of geometric figure), an arc-containing coverage range determination strategy (i.e., a first strategy) is adopted to determine the shape of the geometric figure representing the coverage range of the NTN logical cell. Specifically, when the geometric figure representing the coverage range of the NTN logical cell is a figure containing an arc (i.e., a second type of geometric figure), there are points that are not endpoints among the multiple target points located according to the information recorded in the multiple key fields. Specifically, when the value of the radius field included in the key field is not 0, it indicates that the target point represented by the key field to which it belongs is not an endpoint. Therefore, in this embodiment, first, the radius field to which the value is not 0 belongs is determined in the newly added field. (target) key field; for each key field whose radius field value is not 0 (i.e., the target key field), the arc contained in the geometric figure is determined based on the value of the radius field and the value of the angle field (anglestart field and angleend field) contained therein, and then a (second) closed figure is constructed using the GIS algorithm based on multiple target points represented by multiple remaining key fields and the arc. The interior of the (second) closed figure is the coverage range of the NTN logical cell represented by the key field; wherein the remaining key field is a key field whose radius field value is 0 among all the key fields contained in the newly added field, and a straight line is used to connect multiple target points represented by multiple remaining key fields of the arc. Figure 5 This is a schematic diagram of the second type of geometric figure. When the coverage of the NTN logical cell is expressed as Figure 5When the geometric figure shown in the figure is shown in the figure, the newly added fields contain 5 key fields, namely the key field for recording the position parameters of endpoint 1, the key field for recording the position parameters of endpoint 2, the key field for recording the position parameters of endpoint 3, the key field for recording the position parameters of endpoint 4, and the key field for recording the position parameters of endpoint 5. Among them, the value of the radius field of endpoints 1-4 is 0, indicating that the radius field is meaningless; the value of the angle field (anglestart field and angleend field) of endpoints 1-4 is also 0, indicating that the angle field (anglestart field and angle end field) is meaningless; the value of the radius field of endpoint 5 is not 0, indicating that the geometric figure representing the coverage range of the NTN logical cell contains an arc, and the value of the radius field is the length of the radius of the arc; the value of the angle field (anglestart field and angleend field) of endpoint 5 is also not 0, the value of the anglestart field indicates the starting angle (α) of the arc with endpoint 5 as the starting point and the value of the radius field as the radius length, and the value of the angleend field indicates the ending angle (β) of the arc with endpoint 5 as the starting point and the value of the radius field as the radius length, Figure 5 The reference ray in is c.

[0055] It should be noted that when these target points are connected into closed figures (a first closed figure and a second closed figure) using a GIS algorithm, based on a pre-set connection rule, it can be ensured that no two connecting lines intersect inside the closed figure.

[0056] Step S206: Determine whether the terminal is located within the coverage range according to the current location of the terminal and the coverage range of the NTN logical cell.

[0057] After the terminal determines the coverage of each NTN logical cell, in step S206, the terminal determines whether the terminal is currently located within the coverage of a certain NTN logical cell by determining the relative position relationship between its own current position and the coverage of the NTN logical cell, and can determine which NTN logical cell the terminal is currently located within the coverage of; the above relative position relationship includes: the current position of the terminal is outside the coverage of the NTN logical cell, and the current position of the terminal is within the coverage of the NTN logical cell.

[0058] Optionally, the current position includes: the longitude value of the terminal and the latitude value of the terminal. Determining whether the terminal is within the coverage range according to the current position of the terminal and the coverage range of the NTN logical cell includes: determining the test point for representing the terminal according to the longitude value and the latitude value; determining any straight line passing through the test point as the target straight line; determining the number of intersections of the target straight line with the geometric figure when the target straight line passes through the geometric figure; when the value of the number is an odd number, determining that the terminal is within the coverage range; when the value of the number is an even number, determining that the terminal is not within the coverage range.

[0059] In this embodiment, after the coverage range of each NTN logical cell is determined, the terminal determines whether its current position is within the coverage range of each NTN logical cell. The embodiment of the present application determines whether the terminal is within the coverage range of the NTN logical cell by the intersection rule when a straight line intersects a geometric figure. Specifically, a point representing the terminal (i.e., a point to be measured) is determined according to the longitude and latitude values ​​of the terminal, and any straight line passing through the point to be measured is determined as a straight line (i.e., a target straight line) used to assist in determining whether the current position of the terminal is within the coverage range of the NTN logical cell; next, when the target straight line passes through the geometric figure representing the coverage range of the NTN logical cell, the target straight line is intersected with the boundary shape of the geometric figure. The above-mentioned crossing means that both ends of the target straight line pass through the boundary of the geometric figure; finally, if the target straight line passes through the geometric figure representing the coverage range of the NTN logical cell, the number of intersections formed with the boundary of the geometric figure is an odd number, indicating that the current position of the terminal falls within the coverage range of the NTN logical cell, and the terminal can currently access this NTN logical cell; otherwise, if the target straight line passes through the geometric figure representing the coverage range of the NTN logical cell, the number of intersections formed with the boundary of the geometric figure is an even number, indicating that the current position of the terminal does not fall within the coverage range of the NTN logical cell, and the terminal cannot currently access this NTN logical cell. The coverage range judgment method based on the location parameter of this embodiment can quickly and accurately judge whether the terminal is within the coverage range, which is particularly effective for terminals with high mobility and frequent location changes, such as terminals on aircraft. By judging whether they are within the coverage range in real time, it can ensure timely access or disconnection to the network, thereby improving the utilization efficiency of network resources and user experience.

[0060] Step S208: When the terminal is within the coverage area, it is determined that the NTN logical cell allows access; when the terminal is not within the coverage area, it is determined that the NTN logical cell does not allow access.

[0061] In step S208, the NTN logical cell that can be accessed at the current location can be determined according to the judgment result obtained in step S206. Specifically, the NTN logical cell whose relative position relationship with the current location of the terminal in step S206 is: "the current location of the terminal is within the coverage of the NTN logical cell" is the NTN logical cell that the terminal is allowed to access, and the NTN logical cell whose relative position relationship with the current location of the terminal in step S206 is: "the current location of the terminal is outside the coverage of the NTN logical cell" is the NTN logical cell that the terminal is not allowed to access.

[0062] Through the above steps, the auxiliary terminal can clearly identify the accessible NTN logical cells and the coverage of the NTN logical cells in any geographical location.

[0063] The embodiment of the present application also provides a method for accessing a non-terrestrial network logical cell. Figure 6 is a flowchart of another method for accessing a non-terrestrial network logical cell, such as Figure 6 As shown, the method comprises the following steps:

[0064] Step S602: record information related to the coverage of the non-terrestrial network NTN in a newly added field, and add the newly added field to a system information block SIB, wherein the SIB is included in a system message of the NTN.

[0065] In order to determine the coverage of the NTN logical cell, the terminal needs to know relevant information that can be used to determine the coverage of the NTN logical cell. In step S602, the information related to the coverage of the NTN logical cell is written into a field (i.e., a newly added field) in the system information block (SIB).

[0066] Step S604: broadcast system messages to the terminals at a preset period.

[0067] Since the SIB is included in the system message, the SIB can be sent to the terminal together with the system message on the network side. In step S604, the network side of the non-terrestrial network broadcasts the SIB together with the system message when broadcasting the system message to the terminal, and sends the newly added fields in the SIB to the terminal. By adding a field describing the coverage of the NTN logical cell in the system information block, this method enables the terminal to accurately determine whether it is within the coverage of a specific logical cell, thereby deciding whether to access the logical cell, effectively improving the accuracy of access and the reasonable allocation of network resources. It is particularly suitable for non-terrestrial communication systems such as satellite communications and drone networks, and can cope with the challenges of irregular and dynamic changes in coverage.

[0068] Figure 7is a structural diagram of an access device for a non-terrestrial network logical cell provided according to an embodiment of the present application, such as Figure 7 As shown, the access device of the non-terrestrial network logical cell includes: an acquisition module 70, which is used to obtain a system message of the non-terrestrial network NTN, wherein the system message is broadcast by the NTN to the terminal according to a preset period, and the system message at least includes a system information block SIB recording a newly added field, and the newly added field is used to record information related to the coverage range of the NTN logical cell; a first determination module 72, which is used to determine the coverage range of the NTN logical cell according to the information recorded in the newly added field; a second determination module 74, which is used to determine whether the terminal is located within the coverage range according to the current location of the terminal and the coverage range of the NTN logical cell; a third determination module 76, which is used to determine that the NTN logical cell is allowed to access when the terminal is within the coverage range, and to determine that the NTN logical cell is not allowed to access when the terminal is not within the coverage range.

[0069] It should be noted that Figure 7 The preferred implementation of the illustrated embodiment can be found in Figure 2 The relevant description of the illustrated embodiment will not be repeated here.

[0070] An embodiment of the present application also provides a non-volatile storage medium, in which a computer program is stored, wherein the above non-terrestrial network logical cell access method is executed by running the computer program on a device where the non-volatile storage medium is located.

[0071] The above-mentioned non-volatile storage medium is used to store a program for performing the following functions: obtaining a system message of a non-terrestrial network NTN, wherein the system message is broadcast by the NTN to the terminal according to a preset period, and the system message at least includes a system information block SIB recording a newly added field, and the newly added field is used to record information related to the coverage of the NTN logical cell; determining the coverage of the NTN logical cell according to the information recorded in the newly added field; determining whether the terminal is located within the coverage according to the current location of the terminal and the coverage of the NTN logical cell; if the terminal is within the coverage, determining that the NTN logical cell is allowed to access, and if the terminal is not within the coverage, determining that the NTN logical cell is not allowed to access.

[0072] An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to execute the above non-terrestrial network logical cell access method through the computer program.

[0073] The processor in the above-mentioned electronic device is used to run a program that performs the following functions: obtaining a system message of a non-terrestrial network NTN, wherein the system message is broadcast by the NTN to the terminal according to a preset period, and the system message at least includes a system information block SIB recording a newly added field, and the newly added field is used to record information related to the coverage of the NTN logical cell; determining the coverage of the NTN logical cell according to the information recorded in the newly added field; determining whether the terminal is located within the coverage according to the current location of the terminal and the coverage of the NTN logical cell; if the terminal is within the coverage, determining that the NTN logical cell is allowed to access, and if the terminal is not within the coverage, determining that the NTN logical cell is not allowed to access.

[0074] An embodiment of the present application also provides a computer program product, including computer instructions, which implement the steps of the above non-terrestrial network logical cell access method when executed by a processor.

[0075] It should be noted that the various modules in the access device of the above-mentioned non-terrestrial network logical cell can be program modules (for example, a set of program instructions to implement a certain specific function) or hardware modules. For the latter, it can be expressed in the following forms, but is not limited to this: the expression form of each of the above-mentioned modules is a processor, or the functions of each of the above-mentioned modules are implemented by a processor.

[0076] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0077] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0078] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0079] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0080] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0081] If the integrated unit is implemented in the form of 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 the present application, or the part that contributes to the relevant technology or all or part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0082] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for accessing a non-terrestrial network logical cell, characterized in that: include: Acquire a system message of a non-terrestrial network NTN, wherein the system message is broadcast by the NTN to the terminal according to a preset period, and the system message includes at least a system information block SIB recording a newly added field, and the newly added field is used to record information related to the coverage of the NTN logical cell; Determine the coverage of the NTN logical cell according to the information recorded in the newly added field; Determining whether the terminal is located within the coverage range according to the current location of the terminal and the coverage range of the NTN logical cell; In the case where the terminal is located within the coverage area, it is determined that the NTN logical cell allows access; and in the case where the terminal is not located within the coverage area, it is determined that the NTN logical cell does not allow access.

2. The method according to claim 1, characterized in that The newly added field includes description information of a geometric figure, the description information is used to determine the coverage of the NTN logical cell, and the description information includes multiple target points in the geometric figure, wherein the target point is a point among the multiple points included in the geometric figure used to determine the coverage area corresponding to the geometric figure; the information related to the coverage of the NTN logical cell includes: location parameters of each of the target points, the location parameters include: longitude value, latitude value, length value of a radius starting from the target point, and angle value of an angle between a ray starting from the target point and a reference ray; the newly added field includes multiple key fields corresponding to the NTN logical cells one by one, each of the key fields includes: a first type field for recording the longitude value, a second type field for recording the latitude value, a third type field for recording the length value, and a fourth type field for recording the angle value; Determining the coverage of the NTN logical cell according to the information recorded in the newly added field includes: Determine the values ​​of different key fields, wherein the value of each key field is the actual value of the location parameter recorded in the key field; and determine the coverage of the NTN logical cell according to the value.

3. The method according to claim 2, characterized in that Determining the coverage of the NTN logical cell according to the value includes: Determine the shape of the NTN logical cell according to the value of the third type field, wherein the shape includes: a first type of geometric figure including an arc and a second type of geometric figure not including an arc; The coverage range of the NTN logical cell is determined according to a coverage range determination strategy corresponding to the shape.

4. The method according to claim 3, characterized in that Determining the shape of the NTN logical cell according to the value of the third type of field includes: When all the third-type fields included in the newly added field have values ​​of 0, determining that the shape of the NTN logical cell is the first-type geometric figure; When the value of at least one of the third-type fields included in the newly added field is not 0, it is determined that the shape of the NTN logical cell is the second-type geometric figure.

5. The method according to claim 3, characterized in that: Determining the coverage of the NTN logical cell according to the coverage determination strategy corresponding to the shape, wherein, when the shape is the first type of geometric figure, determining the coverage of the NTN logical cell according to the first strategy includes: For each of the key fields, determine the target point corresponding to each of the key fields according to the values ​​of the first category of fields and the values ​​of the second category of fields, wherein the number of the target points is the same as the number of the key fields; Connecting a plurality of the target points with straight lines to obtain a first closed figure; The interior of the first closed figure is determined as the coverage range of the NTN logical cell.

6. The method according to claim 3, characterized in that Determining the coverage of the NTN logical cell according to the coverage determination strategy corresponding to the shape, wherein, when the shape is the second type of geometric figure, determining the coverage of the NTN logical cell according to the second strategy includes: Determine the target key field to which the third category field whose value is not 0 belongs; Determine the arc corresponding to the target key field according to the value of the third type of field and the value of the fourth type of field contained in the target key field; Connecting the arc and the plurality of target points corresponding to the remaining key fields into a second closed graph by using a straight line, wherein the remaining key fields are the key fields other than the target key fields among all the key fields included in the newly added field; The interior of the second closed figure is determined as the coverage range of the NTN logical cell.

7. The method according to claim 3, characterized in that The current location includes: the longitude value of the terminal and the latitude value of the terminal, and determining whether the terminal is located within the coverage range according to the current location of the terminal and the coverage range of the NTN logical cell includes: Determine a point to be measured for representing the terminal according to the longitude value and the latitude value; Determine any straight line passing through the point to be measured as a target straight line; Determine the number of intersections between the target straight line and the geometric figure when the target straight line passes through the geometric figure; When the value of the number is an odd number, determining that the terminal is within the coverage area; When the value of the number is an even number, it is determined that the terminal is not within the coverage area.

8. A method for accessing a non-terrestrial network logical cell, characterized in that: include: Recording information related to the coverage of the non-terrestrial network NTN in a newly added field, and adding the newly added field to a system information block SIB, wherein the SIB is included in a system message of the NTN; The system message is broadcast to the terminal at a preset period.

9. A non-terrestrial network logical cell access device, characterized in that: include: An acquisition module, configured to acquire a system message of a non-terrestrial network NTN, wherein the system message is broadcast by the NTN to the terminal according to a preset period, and the system message at least includes a system information block SIB recording a newly added field, and the newly added field is used to record information related to the coverage of the NTN logical cell; A first determination module, configured to determine the coverage of the NTN logical cell according to the information recorded in the newly added field; A second determination module, configured to determine whether the terminal is located within the coverage range according to the current location of the terminal and the coverage range of the NTN logical cell; The third determining module is configured to determine that the NTN logical cell allows access when the terminal is within the coverage area, and determine that the NTN logical cell does not allow access when the terminal is not within the coverage area.

10. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a computer program, wherein the device where the non-volatile storage medium is located executes the method for accessing a non-terrestrial network logical cell as described in any one of claims 1 to 7 by running the computer program.

11. An electronic device comprising a memory and a processor, characterized in that: The memory stores a computer program, and the processor is configured to execute the non-terrestrial network logical cell access method according to any one of claims 1 to 7 through the computer program.

12. A computer program product comprising computer instructions, characterized in that: When the computer instructions are executed by a processor, the steps of the method for accessing a non-terrestrial network logical cell as described in any one of claims 1 to 7 are implemented.

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