Method and device for indicating connection establishment between base station and gateway station and computing equipment

文档序号：1925050 发布日期：2021-12-03 浏览：12次中文

阅读说明：本技术 指示基站与信关站建立连接的方法、装置及计算设备 (Method and device for indicating connection establishment between base station and gateway station and computing equipment ) 是由汪宇乔云飞周建伟于 2020-05-27 设计创作，主要内容包括：本发明实施例公开了一种指示基站与信关站建立连接的方法、装置及计算设备,属于通信技术领域。该方法包括：获取目标基站对应的目标通信卫星的星历信息,以及目标通信卫星对应的多个信关站的位置信息；基于目标通信卫星的星历信息以及多个信关站的位置信息,确定每个信关站与目标通信卫星在目标通信卫星和地球的相对运动周期内的有效通信时间段；基于多个信关站的有效通信时间段和相对运动周期,在多个信关站中确定部分目标信关站,其中,各目标信关站的有效通信时间段的并集时间段能够覆盖整个相对运动周期；指示目标基站分别与每个目标信关站建立连接。采用本申请,能够降低卫星通信网络的建设成本。(The embodiment of the invention discloses a method, a device and computing equipment for indicating a base station and a gateway station to establish connection, and belongs to the technical field of communication. The method comprises the following steps: acquiring ephemeris information of a target communication satellite corresponding to a target base station and position information of a plurality of gateway stations corresponding to the target communication satellite; determining an effective communication time period of each gateway station and the target communication satellite in a relative motion cycle of the target communication satellite and the earth based on the ephemeris information of the target communication satellite and the position information of the plurality of gateway stations; determining a part of target gateway stations in the plurality of gateway stations based on the effective communication time periods and the relative motion cycles of the plurality of gateway stations, wherein the union time period of the effective communication time periods of the target gateway stations can cover the whole relative motion cycle; and indicating the target base station to establish connection with each target gateway station respectively. By the aid of the method and the device, construction cost of the satellite communication network can be reduced.)

1. A method for instructing a base station to establish a connection with a gateway station, the method comprising:

acquiring ephemeris information of a target communication satellite corresponding to a target base station and position information of a plurality of gateway stations corresponding to the target communication satellite;

determining a valid communication time period for each gateway station with the target communication satellite within a relative motion cycle of the target communication satellite and the earth based on ephemeris information of the target communication satellite and position information of the plurality of gateway stations;

determining a portion of target gateway stations among the plurality of gateway stations based on the effective communication time periods and the relative motion cycle of the plurality of gateway stations, wherein a union time period of the effective communication time periods of the target gateway stations can cover the whole relative motion cycle;

and indicating the target base station to establish connection with each target gateway station respectively.

2. The method of claim 1, wherein the duration of the relative movement period is the least common multiple of the duration of the autorotation of earth period and the duration of the movement period of the target communication satellite.

3. The method of claim 1, wherein determining a valid communication time period for each gateway station with the target communication satellite during a relative motion cycle of the target communication satellite and earth based on ephemeris information of the target communication satellite and location information of the plurality of gateway stations comprises:

determining a time period of visibility of each gateway station with the target communication satellite within a relative motion cycle of the target communication satellite and earth based on ephemeris information of the target communication satellite and location information of the plurality of gateway stations;

and respectively determining an effective communication time period corresponding to each gateway station based on the visible time period corresponding to each gateway station, wherein the duration of the effective communication time period corresponding to each gateway station is less than that of the visible time period.

4. The method of claim 1, wherein said determining a portion of target gateway stations among said plurality of gateway stations based on an effective communication time period and said relative motion period of said plurality of gateway stations comprises:

determining a plurality of connected time periods divided in the relative movement cycle;

determining a portion of the target gateway stations among the plurality of gateway stations based on the plurality of connection time periods, the valid communication time periods of the plurality of gateway stations, and the relative movement period.

5. The method of claim 4, wherein said determining a portion of the target gateway stations among the plurality of gateway stations based on the plurality of connection time periods, the active communication time periods of the plurality of gateway stations, and the relative motion cycle comprises:

determining a connection time period corresponding to each gateway station based on the plurality of connection time periods and valid communication time periods of the plurality of gateway stations, wherein the connection time period corresponding to each gateway station is within the range of the corresponding valid communication time period;

establishing a directed graph by taking a connection time period corresponding to each gateway station as a vertex, wherein in the directed graph, if the connection time periods corresponding to any two first vertices are adjacent in time and correspond to the same gateway station, the weight of an edge between the two first vertices is a first numerical value, and if the connection time periods corresponding to any two second vertices are adjacent in time and correspond to different gateway stations, the weight of an edge between the two second vertices is a second numerical value, wherein the first numerical value is smaller than the second numerical value;

determining a shortest path in the directed graph based on a shortest path algorithm;

and determining the target gateway station corresponding to the vertex on the shortest path.

6. The method of claim 5, further comprising:

determining a total connection time period corresponding to each target gateway station based on the connection time period corresponding to each target gateway station;

determining the time for the communication satellite to perform feeder link switching with each target gateway station based on the total connection time period corresponding to each target gateway station;

and determining interruption indication information based on the time of the target communication satellite and each target gateway station for switching the feeder link and the connection mode of the target communication satellite and the target base station, wherein the interruption indication information comprises an interruption type and an interruption time period, and the interruption indication information is sent to the user terminal by the target gateway station so as to indicate the interruption type and the interruption time period of signal interruption generated by the user terminal due to the feeder link switching between the target communication satellite and the target gateway station.

7. An apparatus for instructing a base station to establish a connection with a gateway station, the apparatus comprising:

the system comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring ephemeris information of a target communication satellite corresponding to a target base station and position information of a plurality of gateway stations corresponding to the target communication satellite;

a determining module, configured to determine, based on ephemeris information of the target communication satellite and position information of the plurality of gateway stations, a valid communication time period of each gateway station with the target communication satellite within a relative motion cycle of the target communication satellite and the earth; determining a portion of target gateway stations among the plurality of gateway stations based on the effective communication time periods and the relative motion cycle of the plurality of gateway stations, wherein a union time period of the effective communication time periods of the target gateway stations can cover the whole relative motion cycle;

and the indicating module is used for indicating the target base station to establish connection with each target gateway station respectively.

8. The apparatus of claim 7, wherein the duration of the relative movement period is a least common multiple of the duration of the autorotation of earth period and the duration of the movement period of the target communication satellite.

9. The apparatus of claim 7, wherein the determining module is configured to:

10. The apparatus of claim 7, wherein the determining module is configured to:

determining a plurality of connected time periods divided in the relative movement cycle;

11. The apparatus of claim 10, wherein the determining module is configured to:

determining a shortest path in the directed graph based on a shortest path algorithm;

and determining the target gateway station corresponding to the vertex on the shortest path.

12. The apparatus of claim 11, wherein the indication module is further configured to:

determining a total connection time period corresponding to each target gateway station based on the connection time period corresponding to each target gateway station;

13. A computing device that instructs a base station to establish a connection with a gateway station, the computing device comprising a processor and a memory, wherein:

the memory having stored therein computer instructions;

the processor executes the computer instructions to implement the method of any of claims 1-6.

14. A computer-readable storage medium storing computer instructions which, when executed by a computing device, cause the computing device to perform the method of any of claims 1-6 or to implement the functionality of the apparatus of any of claims 7-12.

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, and a computing device for indicating a base station to establish a connection with a gateway station.

Background

With the development of communication technology, a Non-Terrestrial communication Network NTN (Non-Terrestrial Network), that is, a satellite communication Network, has significant advantages of global coverage, long-distance transmission, flexible networking, convenient deployment, no limitation of geographical conditions, and the like, and has been widely applied to multiple fields of marine communication, positioning navigation, emergency relief, scientific experiments, video broadcasting, earth observation, and the like.

Existing satellite communication networks may include communication satellites, gateway stations, gnbs (5G Node bs, 5G base stations), UEs (User Equipment), and the like. The communication satellite and the gNB can establish connection through a gateway station, the communication satellite broadcasts system information of a cell corresponding to the gNB, and the UE establishes connection with the communication satellite through searching the system information of the cell, so that data can be transmitted between the UE and the gNB.

In the course of implementing the present application, the inventors found that the related art has at least the following problems:

due to the movement of the communication satellite and the rotation of the earth, the communication satellite cannot be constantly visible between the gateway stations distributed on the ground and the communication satellite, namely the gateway stations are not always within the signal coverage range of the communication satellite, so that the communication satellite can be connected with different gateway stations on the ground at different time periods. In order to ensure the normal operation of the satellite communication network, when the satellite communication network is established, the gNB needs to establish connection with all the gateway stations on the ground, but the cost for establishing the satellite communication network is also increased.

Disclosure of Invention

The embodiment of the application provides a method, a device and computing equipment for indicating connection establishment between a base station and a gateway station, which are used for indicating establishment between the base station and the gateway station.

In a first aspect, the present application provides a method for instructing a base station to establish a connection with a gateway station, the method comprising: acquiring ephemeris information of a target communication satellite corresponding to a target base station and position information of a plurality of gateway stations corresponding to the target communication satellite; determining an effective communication time period of each gateway station and the target communication satellite in a relative motion cycle of the target communication satellite and the earth based on the ephemeris information of the target communication satellite and the position information of the plurality of gateway stations; determining a part of target gateway stations in the plurality of gateway stations based on the effective communication time periods and the relative motion cycles of the plurality of gateway stations, wherein the union time period of the effective communication time periods of the target gateway stations can cover the whole relative motion cycle; and indicating the target base station to establish connection with each target gateway station respectively.

The scheme shown in the embodiment of the invention can be applied to the process of establishing a satellite communication network, wherein the satellite communication network comprises a communication satellite, gateway stations, a gNB, UE and the like, the gNB is connected with a plurality of gateway stations, the communication satellite is connected with different gateway stations in different time periods and broadcasts the cell system information corresponding to the gNB, and the UE realizes satellite communication by receiving the cell system information corresponding to the gNB. Specifically, the technician can accurately calculate the operating states of the communication satellite, such as the position, the velocity, and the like, at different times according to the ephemeris information. And then acquiring the position information of each gateway station in the satellite communication system, wherein the position information can be the longitude and latitude of each gateway station. And then determines a time period (i.e., an effective time period) during which each of the gateway stations can communicate with the target communication satellite during the relative movement cycle of the target communication satellite and the earth, based on the position of the communication satellite at different times and the position information of the respective gateway stations. Wherein the relative positions of the target communication satellite and each of the gateway stations are the same at corresponding like times in the plurality of relative movement periods. A portion of the target gateway stations may then be determined among the plurality of gateway stations based on the effective communication time period and the relative motion cycle for each of the gateway stations, wherein a union of the effective communication time periods for the respective gateway stations among the portion of the target gateway stations is capable of covering the entire relative motion cycle. Finally, the target base station can be set to establish a connection with each target gateway station. Therefore, under the condition of ensuring the normal communication of the satellite communication network, the connection cost of the gNB and the gateway station and the times of switching the feeder link between the satellite and the gateway station are reduced.

In one possible implementation, the duration of the relative movement period is the least common multiple of the duration of the earth rotation period and the duration of the movement period of the target communication satellite.

According to the scheme shown in the embodiment of the invention, the common multiple or the minimum common multiple of the duration (the movement period of the target communication satellite) of the target communication satellite surrounding the earth for one circle and the duration of the earth rotation period can be determined as the relative movement period of the target communication satellite and the earth. Thus, the relative positions of the target communication satellite and the respective gateway stations are the same at any one of the same time during each of the relative movement periods.

In one possible implementation, determining an effective communication time period between each gateway station and the target communication satellite in a relative motion cycle of the target communication satellite and the earth based on ephemeris information of the target communication satellite and position information of a plurality of gateway stations includes: determining a visibility time period of each gateway station and the target communication satellite within a relative motion cycle of the target communication satellite and the earth based on ephemeris information of the target communication satellite and position information of a plurality of gateway stations; and respectively determining an effective communication time period corresponding to each gateway station based on the visible time period corresponding to each gateway station, wherein the duration of the effective communication time period corresponding to each gateway station is less than that of the visible time period.

According to the scheme shown in the embodiment of the invention, before the effective communication time period of each gateway station and the target communication satellite in the relative motion cycle is determined, the visible time period of each gateway station and the target communication satellite can be determined. The visible time period of the gateway station is the time period of the gateway station in the coverage range of the broadcast signal of the target communication satellite, the positions of the target communication satellite at different moments can be calculated through ephemeris information, and then the visible time period of each gateway station is calculated according to the position information of each gateway station and the coverage area of the broadcast signal of the target communication satellite. The effective communication time period is a time period in which the target communication satellite and the gateway station can normally communicate, and the starting and ending time points of the effective communication time period of the gateway station are within the visible time period. In this way, the corresponding effective communication time period can be determined from the calculated visible time period.

In one possible implementation, determining a portion of the target gateway stations among the plurality of gateway stations based on the effective communication time periods and the relative movement cycles of the plurality of gateway stations includes: determining a plurality of connected time periods divided in a relative movement cycle; a portion of the target gateway stations is determined among the plurality of gateway stations based on the plurality of connection time periods, the effective communication time periods of the plurality of gateway stations, and the relative movement period.

According to the scheme shown in the embodiment of the invention, in the process of determining the target gateway station, the relative motion cycle of the target communication satellite and the earth can be divided into a plurality of connection time periods in advance. And determining part of target gateway stations for establishing connection with the gNB according to the effective communication time period of each gateway station and the division into a plurality of connection time periods in the relative motion period. During each connection period, the target communication satellite establishes a connection only with the corresponding target gateway station.

In one possible implementation, determining a portion of the target gateway stations among the plurality of gateway stations based on the plurality of connection time periods, the effective communication time periods of the plurality of gateway stations, and the relative movement period includes: determining a connection time period corresponding to each gateway station based on a plurality of connection time periods and effective communication time periods of a plurality of gateway stations, wherein the connection time period corresponding to each gateway station is within the range of the corresponding effective communication time period; establishing a directed graph by taking the connection time period corresponding to each gateway station as a vertex, wherein in the directed graph, if the connection time periods corresponding to any two first vertices are adjacent in time and correspond to the same gateway station, the weight of an edge between the two first vertices is a first numerical value, and if the connection time periods corresponding to any two second vertices are adjacent in time and correspond to different gateway stations, the weight of an edge between the two second vertices is a second numerical value, wherein the first numerical value is smaller than the second numerical value; determining a shortest path in the directed graph based on a shortest path algorithm; and determining the target gateway station corresponding to the vertex on the shortest path.

According to the scheme shown in the embodiment of the invention, technical personnel can determine the connection time period corresponding to each gateway station according to the effective communication time period or the visible time period of each gateway station, wherein each gateway station can correspond to a plurality of connection time periods, then the connection time period corresponding to each gateway station is taken as a vertex, and a directed graph is established according to the starting time and the ending time of each connection time period. If the gateway stations corresponding to the connection time periods of two adjacent vertexes are the same, the weight of the edge between the two adjacent vertexes can be set to be a first value, and if the gateway stations corresponding to the connection time periods of the two adjacent vertexes are different, the weight of the edge between the two adjacent vertexes can be set to be a second value, wherein the first value is smaller than the second value. And then determining at least one shortest path according to a shortest path algorithm. Thus, the number of the target gateway stations corresponding to the vertex on the determined shortest path is the minimum through the shortest path algorithm.

In one possible implementation, after the target gateway stations are determined, a total connection time period corresponding to each target gateway station is determined based on a connection time period corresponding to each target gateway station; determining the time for switching the feeder link between the communication satellite and each target gateway station based on the total connection time period corresponding to each target gateway station; and determining interruption indication information based on the time of the target communication satellite and each target gateway station for switching the feeder link and the connection mode of the target communication satellite and the target base station, wherein the interruption indication information comprises an interruption type and an interruption time period, and the interruption indication information is transmitted to the user terminal by the target gateway station so as to indicate the interruption type and the interruption time period of signal interruption generated by the user terminal due to the feeder link switching between the target communication satellite and the target gateway station.

According to the scheme shown in the embodiment of the invention, the target communication satellite may need to establish connection with different gateway stations in different connection time periods, and then at the ending time point or the starting time point of each connection time period, the target communication satellite may switch the feeder link with the gateway station, namely disconnect the currently connected gateway station and establish connection with the next gateway station to be connected. Therefore, the total connection time period corresponding to each target gateway station can be determined according to the connection time period corresponding to each target gateway station, the starting time point or the ending time point of the total connection time period corresponding to each target gateway station is the time point of the feed link switching of the target communication satellite, in order to avoid the interruption of data transmission caused by the feed link switching of the target communication satellite by the UE, interruption indication information can be sent to the UE before the feed link switching of the target communication satellite, the ending time point of the starting time point is included in the interruption indication information, the starting time point of the interruption is the starting time point and the ending time point of the total connection time period corresponding to each target gateway station, the ending time point can be set by technical personnel according to the starting time point of the interruption, and the type of the interruption can be determined according to the connection mode of the gNB and the target communication satellite, the method comprises uplink and downlink full interruption and uplink interruption without interruption. Therefore, the UE can send the interruption indication information in advance before the target communication satellite carries out the feed link switching, and the data transmission interruption caused by the feed link switching of the target communication satellite by the UE can be avoided.

In a second aspect, an apparatus for instructing a base station to establish a connection with a gateway station is provided, the apparatus comprising: the system comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring ephemeris information of a target communication satellite corresponding to a target base station and position information of a plurality of gateway stations corresponding to the target communication satellite; the determining module is used for determining effective communication time periods of each gateway station and the target communication satellite in a relative motion cycle of the target communication satellite and the earth based on ephemeris information of the target communication satellite and position information of a plurality of gateway stations; determining a part of target gateway stations in the plurality of gateway stations based on the effective communication time periods and the relative motion cycles of the plurality of gateway stations, wherein the union time period of the effective communication time periods of the target gateway stations can cover the whole relative motion cycle; and the indicating module is used for indicating the target base station to establish connection with each target gateway station respectively.

In one possible implementation, the determining module is configured to: determining a visibility time period of each gateway station and the target communication satellite within a relative motion cycle of the target communication satellite and the earth based on ephemeris information of the target communication satellite and position information of a plurality of gateway stations; and respectively determining an effective communication time period corresponding to each gateway station based on the visible time period corresponding to each gateway station, wherein the duration of the effective communication time period corresponding to each gateway station is less than that of the visible time period.

In one possible implementation, the determining module is configured to: determining a plurality of connected time periods divided in a relative movement cycle; a portion of the target gateway stations is determined among the plurality of gateway stations based on the plurality of connection time periods, the effective communication time periods of the plurality of gateway stations, and the relative movement period.

In one possible implementation, the determining module is configured to:

determining a connection time period corresponding to each gateway station based on a plurality of connection time periods and effective communication time periods of a plurality of gateway stations, wherein the connection time period corresponding to each gateway station is within the range of the corresponding effective communication time period; establishing a directed graph by taking the connection time period corresponding to each gateway station as a vertex, wherein in the directed graph, if the connection time periods corresponding to any two first vertices are adjacent in time and correspond to the same gateway station, the weight of an edge between the two first vertices is a first numerical value, and if the connection time periods corresponding to any two second vertices are adjacent in time and correspond to different gateway stations, the weight of an edge between the two second vertices is a second numerical value, wherein the first numerical value is smaller than the second numerical value; determining a shortest path in the directed graph based on a shortest path algorithm; and determining the target gateway station corresponding to the vertex on the shortest path.

In one possible implementation, the indication module is further configured to: determining a total connection time period corresponding to each target gateway station based on the connection time period corresponding to each target gateway station; determining the time for switching the feeder link between the communication satellite and each target gateway station based on the total connection time period corresponding to each target gateway station; and determining interruption indication information based on the time of the target communication satellite and each target gateway station for switching the feeder link and the connection mode of the target communication satellite and the target base station, wherein the interruption indication information comprises an interruption type and an interruption time period, and the interruption indication information is transmitted to the user terminal by the target gateway station so as to indicate the interruption type and the interruption time period of signal interruption generated by the user terminal due to the feeder link switching between the target communication satellite and the target gateway station.

In a third aspect, a computing device for instructing a base station to establish a connection with a gateway station is provided, the computing device comprising a processor and a memory, wherein: the memory has stored therein computer instructions; the processor executes the computer instructions to implement the method of the first aspect and its possible implementations.

In a fourth aspect, a computer-readable storage medium is provided, which stores computer instructions that, when executed by a computing device, cause the computing device to perform the method of the first aspect and its possible implementations, or cause the computing device to implement the functions of the apparatus of the second aspect and its possible implementations described above.

In a fifth aspect, there is provided a computer program product containing instructions which, when run on a computing device, cause the computing device to perform the method of the first aspect and its possible implementations or cause the computing device to implement the functionality of the apparatus of the second aspect and its possible implementations.

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

the method comprises the steps of determining an effective communication time period between each gateway station and a target communication satellite by obtaining position information of the plurality of gateway stations and ephemeris information of the target communication satellite, setting a relative motion cycle between the target communication satellite and the earth, predicting the effective communication time period corresponding to each gateway station according to the relative motion cycle, determining part of target gateway stations in the plurality of gateway stations in the satellite communication network, and finally establishing connection with the target gateway stations by indicating the gNB.

Drawings

FIG. 1 is a schematic illustration of an implementation environment provided by an exemplary embodiment of the present application;

FIG. 2 is a system architecture diagram provided in an exemplary embodiment of the present application;

fig. 3 is a flowchart of a method for instructing a base station to establish a connection with a gateway station according to an exemplary embodiment of the present application;

fig. 4 is a schematic diagram illustrating a method for instructing a base station to establish a connection with a gateway station according to an exemplary embodiment of the present application;

fig. 5 is a schematic structural diagram of an apparatus for instructing a base station to establish a connection with a gateway station according to an exemplary embodiment of the present application;

fig. 6 is a schematic structural diagram of a computing device according to an exemplary embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The embodiment of the invention provides a method for indicating a base station to establish connection with a gateway station, which can be applied to the process of establishing a satellite communication network. The satellite communication network belongs to one of non-ground communication networks, has the remarkable advantages of global coverage, long-distance transmission, flexible networking, convenience in deployment, no geographic condition limitation and the like, and can realize that a user terminal is directly connected with a communication satellite to realize data transmission. The satellite communication network may be comprised of communication satellites, gateway stations, gNBs, UEs, and the like. Fig. 1 is a schematic diagram of an implementation environment provided by an embodiment of the present application, where a communication satellite may be a transparent transmission satellite, and is responsible for forwarding data between a UE and a gNB/gateway station in a satellite communication network. The gNB may access a core network to establish a wired connection, such as over an optical fiber, with a gateway station within the satellite communications network. The gateway stations are then connected to a communications satellite to build up a satellite communications network. After the satellite communication network is established, the communication satellite can broadcast the system information of the cell corresponding to the gNB, and the UE establishes connection with the communication satellite by searching the system information of the cell, so that data can be transmitted between the UE and the gNB. In a satellite communication network, one communication satellite may correspond to a plurality of gateway stations, and the plurality of gateway stations may establish connection with the same gNB or with a plurality of gateway stations.

The method for indicating the base station to establish the connection with the gateway station provided by the embodiment of the application can select a part of the gateway stations from a plurality of gateway stations corresponding to a communication satellite so as to indicate the gNB and the part of the gateway stations to establish a satellite communication network. The method of instructing a base station to establish a connection with a gateway station may be performed by a method apparatus of instructing a base station to establish a connection with a gateway station (hereinafter may be referred to as an instructing apparatus). The indication device may be a hardware device, such as a server, a terminal computing device, etc., or may be a software device (such as a set of software programs running on a hardware device). For example, as shown in fig. 2, the indicating apparatus may operate in a cloud computing device system (which may include at least one cloud computing device, such as a server, etc.), may also operate in an edge computing device system (which may include at least one edge computing device, such as a server, a desktop computer, etc.), and may also operate in various terminal computing devices (such as a notebook computer, a personal desktop computer, etc.).

The indicating device may be logically formed by various parts, for example, the indicating device may include an obtaining module, a determining module and an indicating module. The various components of the pointing device may be deployed in different systems or servers, respectively. Each part of the indicating device can be respectively operated in any two of the cloud computing equipment system, the edge computing equipment system and the terminal computing equipment. The cloud computing device system, the edge computing device system and the terminal computing device are connected through communication paths, and can communicate with each other and transmit data.

A method for instructing a base station to establish a connection with a gateway station according to an embodiment of the present application will be described with reference to fig. 3, and the method may be executed by an instructing device. Referring to fig. 3, the processing flow of the method is as follows:

step 301, obtaining ephemeris information of a target communication satellite corresponding to the target base station and position information of a plurality of gateway stations corresponding to the target communication satellite.

In a satellite communication network, gateway stations are distributed in various regions, countries, of the earth. Multiple gateway stations may establish connections with the same base station, which may be referred to as a target base station. The communication satellite forming the satellite communication network with the target base station and the plurality of gateway stations is the communication satellite of the target base station pair. Each satellite has ephemeris information, which can also be called satellite ephemeris, and the satellite ephemeris determines various parameters of the flight object, such as time, coordinates, azimuth, speed and the like according to the mathematical relationship among 6 orbit parameters of Kepler's law, so that the satellite ephemeris has extremely high precision. Technicians can accurately calculate the running states of the target communication satellite such as the flight time, the flight position, the flight speed and the like through the ephemeris of the target communication satellite, and then the flight positions of the target communication satellite corresponding to different moments can be obtained. The technician may also obtain location information for a plurality of gateway stations in the satellite communications network, which may be the latitude and longitude of each gateway station.

Step 302, based on the ephemeris information of the target communication satellite and the position information of the plurality of gateway stations, determining an effective communication time period of each gateway station and the target communication satellite in a relative motion cycle of the target communication satellite and the earth.

In implementation, after the technician obtains the position information of each gateway station of the satellite communication network and the corresponding flight position of the target communication satellite at different moments, the effective communication time period of each gateway station and the target communication satellite in the relative motion cycle of the target communication satellite and the earth can be calculated according to the position information of each gateway station and the flight position of the target communication satellite at each moment.

The relative movement period of the target communication satellite and the earth is the time length of one relative movement between the target communication satellite and any reference point on the earth, so that the relative positions of the target communication satellite and the same reference point on the earth are the same at the same time of each target communication satellite in the relative movement period of the target communication satellite and the earth. For example, the duration of the relative movement period is 48 hours, the reference point is a marumann peak, and the time for the target communication satellite to fly around the earth is 480 hours, that is, the target communication satellite completes the flight of 10 relative movement periods, then the relative positions of the target communication satellite and the marumann peak at the same time of each relative movement period are the same, and the relative position change of the target communication satellite and the marumann peak at each relative movement period is the same.

Optionally, the duration of the relative movement period is a least common multiple of the duration of the earth rotation period and the duration of the movement period of the target communication satellite. If the condition that the relative position change of the target communication satellite and the Everest in each relative movement period is the same is to be met, the common multiple of the duration of the earth rotation period and the duration of the movement period of the target communication satellite needs to be determined as the duration of the relative movement period. Wherein the least common multiple of the duration of the earth's rotation period and the duration of the movement period of the target communication satellite may be determined as the duration of the relative movement period for the convenience of the technician's calculation.

The effective communication time period of the gateway station and the target communication satellite in the relative motion cycle is a time period that the gateway station is in the signal coverage range of the target communication satellite, can establish connection with the target communication satellite and can maintain normal-speed data transmission. The calculation personnel can calculate the effective communication time period corresponding to each gateway station according to the position information of the gateway station and the flight positions of the target communication satellite corresponding to different moments. The calculation method is as follows: determining a visibility time period of each gateway station and the target communication satellite within a relative motion cycle of the target communication satellite and the earth based on ephemeris information of the target communication satellite and position information of a plurality of gateway stations; and respectively determining an effective communication time period corresponding to each gateway station based on the visible time period corresponding to each gateway station, wherein the duration of the effective communication time period corresponding to each gateway station is less than that of the visible time period.

The visible time period of the gateway station and the target communication satellite in the relative motion cycle of the target communication satellite and the earth is the time period of the gateway station in the signal coverage range of the target communication satellite. The technical personnel can calculate at least one time slot of the gateway station in a relative motion cycle and the signal coverage range of the target communication satellite according to the position information of the gateway station, the flight positions of the target communication satellite corresponding to different moments and the signal coverage range of the target communication satellite, wherein the at least one time slot is the visible time slot of the gateway station and the target communication satellite. Generally, under the influence of factors such as weather and geographic position, in a start time segment and an end start time segment of a visible time period between a gateway station and a target communication satellite, the gateway station may not be able to establish connection with the target communication satellite, or normal transmission of data is ensured, so the visible time period between the gateway station and the target communication satellite is not necessarily an effective communication time period between the gateway station and the target communication satellite, the duration of the effective communication time period between the general gateway station and the target communication satellite is less than the duration of a corresponding visible time period, a technician may set the durations of the start time segment and the end start time segment, and subtract the durations of the start time segment and the end start time segment in the visible time period between the gateway station and the target communication satellite to obtain a corresponding effective communication time period. The durations of the start time segment and the end start time segment may be set by the skilled person based on experience, and the durations of the start time segment and the end start time segment are not limited herein. For example, the visible time period between the gateway station a and the target communication satellite is 30min to 40min, the time lengths of the start time segment and the end start time segment set by the technician are 2min and 3min respectively, and the effective communication time period between the gateway station a and the target communication satellite is 32min to 37 min.

Step 303, determining a part of target gateway stations in the plurality of gateway stations based on the effective communication time period and the relative movement cycle of the plurality of gateway stations.

Wherein the union of the valid communication time periods of the target gateway stations can cover the entire relative movement period.

In implementation, after obtaining the effective communication time period of each gateway station in the satellite communication network and the relative movement period of the target communication satellite and the earth, a part of the gateway stations which establish connection with the gNB, that is, the target gateway station, can be determined.

In one possible approach, the technician may sort by the starting time points of the active communication time periods for each gateway station and determine the target gateway station in the order of the starting time points of the active communication time periods for each gateway station and the duration of the active communication time periods for each gateway station.

In an implementation, if the start time points of the effective communication periods of the plurality of gateway stations are the same, the sorting positions of the corresponding gateway stations may be the same. The technician determines at least one originating gateway station in the sequence of the start time points of the active communication time periods of the gateway stations, which may be the start time point of the relative movement period or may be located before the start time point of the relative movement period, i.e. the start time point of the originating gateway station may be in the last relative movement period of the relative movement period and the end time point is within the relative movement period. When the number of the starting gateway stations is multiple, the later corresponding ending time point is determined as the first target gateway station. After determining the first target gateway station, the gateway station having the same start time point as the end time point of the first target gateway station, or the gateway station having the start time point within the effective communication time period of the first target gateway station may be determined as a first intermediate gateway station, and if there is only one first intermediate gateway station, the first intermediate gateway station is determined as a second target gateway station, and if there are a plurality of first intermediate gateway stations, the corresponding end time point is determined as a second target gateway station later. After determining the second target gateway station, a gateway station having the same start time point as the end time point of the second target gateway station, or a gateway station having a start time point within the effective communication period of the second target gateway station may be determined as the second intermediate gateway station, and if there is only one second intermediate gateway station, the second intermediate gateway station is the third target gateway station, and if there are a plurality of second intermediate gateway stations, the corresponding end time point is determined as the third target gateway station later. And so on, to determine the subsequent gateway station. And when the end time point of the Nth target gateway station is the end time point of the relative motion period or the end time point of the Nth target gateway station is positioned in the effective communication time period of the first target gateway station, determining the Nth target gateway station as the last target gateway station.

In another possible approach, the technician may determine a plurality of connected time periods divided in the relative motion cycle; a portion of the target gateway stations is determined among the plurality of gateway stations based on the plurality of connection time periods, the effective communication time periods of the plurality of gateway stations, and the relative movement period. The corresponding processing is as follows: determining a connection time period corresponding to each gateway station based on a plurality of connection time periods and effective communication time periods of a plurality of gateway stations, wherein the connection time period corresponding to each gateway station is within the range of the corresponding effective communication time period; establishing a directed graph by taking the connection time period corresponding to each gateway station as a vertex, wherein in the directed graph, if the connection time periods corresponding to any two first vertices are adjacent in time and correspond to the same gateway station, the weight of an edge between the two first vertices is a first numerical value, and if the connection time periods corresponding to any two second vertices are adjacent in time and correspond to different gateway stations, the weight of an edge between the two second vertices is a second numerical value, wherein the first numerical value is smaller than the second numerical value; determining a shortest path in the directed graph based on a shortest path algorithm; and determining the target gateway station corresponding to the vertex on the shortest path.

In an implementation, the technician may divide the relative movement period into a plurality of connection time periods, for example, if the relative movement period is 48 hours, and the connection time period is 10 minutes, then the relative movement period corresponds to 288 connection time periods. In the embodiment of the present application, the scheme is described in detail in such a way that the duration of each connection time period may be equal, and the processing manner in which the duration of each connection time period is unequal is similar to the processing manner in which the duration of each connection time period is equal, and details are not described here. In each connection time period, the target communication satellite establishes connection with the corresponding gateway station only, and the time for switching the feeder link before the target communication satellite and the plurality of gateway stations is the ending time point of each connection time period. After determining the plurality of connection time periods divided in the relative movement cycle, the connection time period corresponding to each gateway station may be determined, the connection time period corresponding to each gateway station is within the range of the corresponding effective communication time period, that is, the duration of the effective communication time period of each gateway station is longer than the corresponding connection time period, and the starting time point and the ending time period of the connection time period corresponding to the gateway station are within the effective communication time period corresponding to the gateway station. One gateway station may have a plurality of effective communication time periods, and each effective communication time period may also correspond to a plurality of connection time periods. For example, the relative movement period is 48 hours, namely, the time period of the relative movement period is 00:00: 00-47: 59:59, the connection time periods are 00:00: 00:00-00: 09:59, 00:10: 00-00: 00:19:59, …, 47:50: 00-47: 59:59, the effective communication time of the gateway station B is 00:25: 00-02: 54:00, and the corresponding connection time period of the gateway station B is 00:30: 00-00: 00:39:59, 00:40: 00:00: 49: 59. Then, a directed graph may be established for the vertex for the connection time period corresponding to each gateway station, where the directed graph may be a weighted directed graph, and if two vertices are adjacent in the connection time period corresponding to the two vertices, the two vertices are adjacent, that is, there may be an edge between the two vertices. The weight of the edge may be determined by the gateway station to which the two vertices correspond. When the connection time periods corresponding to two vertices are adjacent in time and correspond to the same gateway station, the weight of the edge between the two vertices is a first value, and if the connection time periods corresponding to any two vertices are adjacent in time and correspond to different gateway stations, the weight of the edge between the two vertices is a second value, where the first value is smaller than the second value, for example, the first value may be a value close to 0, and the second value may be 1. Fig. 4 is a weighted directed graph constructed for the vertices by the connection period.

After the weighted directed graph is constructed. The technician may obtain the shortest path from the designated starting vertex to the designated ending vertex based on a shortest path algorithm, such as Dijkstra's algorithm (a shortest path algorithm), and designating the starting vertex and the ending vertex. Wherein, the designated start vertex may be a first connected time period in the relative motion cycle, and a start time point of the connected time period is the same as a start time point of the relative motion cycle. The designated end vertex may be the last connected period in the relative motion cycle, and the end time point of the connected period is the same as the end time point of the relative motion cycle. And the gateway station corresponding to the connection time period corresponding to the top point on the shortest path is a target gateway station establishing connection with the base station. In addition, the target communication satellite may establish connection with a plurality of gateway stations at the same time, so the technician may determine a plurality of shortest paths in the established weighted directed graph according to a shortest path algorithm, where the number of the shortest paths is the same as the number of the gateway stations simultaneously connected to the target communication satellite, the number of vertices on different shortest paths is the same, and the gateway stations corresponding to the vertices on different shortest paths are different.

And step 304, indicating the target base station to establish connection with each target gateway station respectively.

In practice, but after determining a portion of the target gateway stations in the satellite communications network, the target base station may be instructed to establish a connection with the target gateway station when the satellite communications network is established.

In a satellite communication network, a target communication satellite may need to establish connections with different gateway stations during different connection periods, and at the end time point or the start time point of each connection period, the target communication satellite may switch the feeder link with the gateway station, i.e. disconnect the currently connected gateway station and establish a connection with the next gateway station to be connected. Since a certain time is required for the target communication satellite to perform the feeder link switching process, the target communication satellite does not establish connection with the gateway station during the feeder link switching process of the target communication satellite, and if the UE of the satellite communication network is used for data transmission at this time, data transmission interruption occurs. The interruption includes downlink interruption or uplink and downlink full interruption. In order to avoid data transmission interruption caused by the UE switching the feeder link due to the target communication satellite, the UE may send interruption indication information to notify the UE of the interruption time and the interruption type before the target communication satellite switches the feeder link, and the corresponding processing is as follows: determining a total connection time period corresponding to each target gateway station based on the connection time period corresponding to each target gateway station; determining the time for switching the feeder link between the communication satellite and each target gateway station based on the total connection time period corresponding to each target gateway station; and determining interruption indication information based on the time of the target communication satellite and each target gateway station for switching the feeder link and the connection mode of the target communication satellite and the target base station, wherein the interruption indication information comprises an interruption type and an interruption time period, and the interruption indication information is transmitted to the user terminal by the target gateway station so as to indicate the interruption type and the interruption time period of signal interruption generated by the user terminal due to the feeder link switching between the target communication satellite and the target gateway station.

In practice, the total connection time period of each target gateway station may be determined according to the connection time period corresponding to each target gateway station determined in the step 303. For example, if the gateway station C corresponds to connection time periods of 00:00:00-:00:09:59, 00:10:00-:00:19:59, then the gateway station C corresponds to a total connection time period of 00:00:00-00:19: 59. And then determining the time for the target communication satellite to switch the feeder link with each target gateway station according to the total connection time period corresponding to each target gateway station. For example, the total connection time period corresponding to the gateway station C is 00:00:00-00:19:59, and the total connection time period corresponding to the gateway station D is 00:20:00-00:29:59, then the time for the corresponding target communication satellite to perform feeder link switching is 00:19: 59. The type of outage may then also be determined based on the manner in which the target communication satellite is connected to the target base station. In the architecture of the satellite communication network provided in the embodiment of the present application, the base station is located on the ground and may be connected to the target communication satellite through the gateway station, the target communication satellite is a transparent transmission satellite, that is, the target communication satellite is only responsible for forwarding data between the UE and the gateway station/gNB, when the target communication satellite switches the feeder link, the target communication satellite is disconnected from the gateway station, the target communication satellite cannot complete forwarding of the data between the UE and the gateway station/gNB, and the corresponding interruption type is full uplink and downlink interruption. In another architecture of a satellite communication network, a base station is located on a satellite, even if a target communication satellite switches a feeder link, the base station can also receive data sent by UE, but cannot receive data of a gateway station, and at this time, the corresponding interruption type is downlink interruption and uplink interruption is not performed. After obtaining the interrupt time and the interrupt type, corresponding interrupt indication information may be generated as follows:

the type is a terminal type, when the type is 0, the uplink and the downlink are interrupted, and when the type is 1, the downlink is interrupted and the uplink is not interrupted;

time-duration-on is the interruption start Time;

time-duration-off is the interrupt end Time.

The technician may set the interrupt end time according to the interrupt start time, for example, the interrupt start time 01:59:59:59, and the interrupt end time 02:00:00: 20.

By determining a portion of the plurality of gateway stations in the satellite communications network, the number of times that a feeder link between the target communications satellite and the gateway stations is switched and the number of interruptions that occur are reduced after the satellite communications network is established due to the reduced number of gateway stations in the satellite communications network. And then, the interruption indication information is sent to the UE in advance, so that the data transmission interruption caused by the feed link switching of the target communication satellite of the UE is avoided.

In the embodiment of the invention, the effective communication time period of each gateway station and the target communication satellite is determined by acquiring the position information of the plurality of gateway stations and the ephemeris information of the target communication satellite, the relative motion cycle of the target communication satellite and the earth is set, the effective communication time period corresponding to each gateway station is predicted according to the relative motion cycle, partial target gateway stations are determined in the plurality of gateway stations in the satellite communication network, and finally the connection is established with the target gateway stations by indicating the gNB.

All the above optional technical solutions may be combined arbitrarily to form the optional embodiments of the present disclosure, and are not described herein again.

Based on the same technical concept, an embodiment of the present invention further provides an apparatus for instructing a base station to establish a connection with a gateway station, as shown in fig. 5, the apparatus includes:

an obtaining module 510, configured to obtain ephemeris information of a target communication satellite corresponding to a target base station and position information of multiple gateway stations corresponding to the target communication satellite, where the obtaining function in step 301 above and other implicit steps may be specifically implemented;

a determining module 520, configured to determine, based on the ephemeris information of the target communication satellite and the position information of the plurality of gateway stations, a valid communication time period of each gateway station with the target communication satellite in a relative motion cycle of the target communication satellite and the earth; determining part of target gateway stations in the plurality of gateway stations based on the effective communication time periods and the relative motion cycles of the plurality of gateway stations, wherein a union time period of the effective communication time periods of the target gateway stations can cover the whole relative motion cycle, and the determining function in the step 302 and the step 303 and other implicit steps can be specifically realized;

an indicating module, configured to instruct the target base station to establish a connection with each target gateway station, where the indicating function in step 304 and other implicit steps may be specifically implemented.

Optionally, the determining module 520 is configured to:

determining a plurality of connected time periods divided in the relative movement cycle;

Optionally, the determining module 520 is configured to:

determining a shortest path in the directed graph based on a shortest path algorithm;

and determining the target gateway station corresponding to the vertex on the shortest path.

Optionally, the indicating module 530 is further configured to:

determining a total connection time period corresponding to each target gateway station based on the connection time period corresponding to each target gateway station;

The division of the modules in the embodiments of the present application is schematic, and only one logic function division is provided, and in actual implementation, there may be another division manner, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, may also exist alone physically, or may also be integrated in one module by two or more modules. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a terminal device (which may be a personal computer, a mobile phone, or a network device) or a processor (processor) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

It should be noted that the obtaining module 510, the determining module 520, and the indicating module 530 may be implemented by a processor, or implemented by a processor in cooperation with a memory and a transceiver.

In the apparatus for instructing a base station to establish a connection with a gateway station according to the foregoing embodiment, when the base station is instructed to establish a connection with the gateway station, only the division of the functional modules is used for illustration, and in practical applications, the function distribution may be completed by different functional modules according to needs, that is, the internal structure of the apparatus may be divided into different functional modules to complete all or part of the functions described above. In addition, the apparatus for indicating a base station to establish a connection with a gateway station and the method embodiment for indicating a base station to establish a connection with a gateway station provided in the foregoing embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiment and are not described herein again.

The embodiment of the application also provides a computing device for indicating the base station to establish the connection with the gateway station. Fig. 6 illustratively provides one possible architecture diagram for a computing device 600.

Computing device 600 includes memory 601, processor 602, communication interface 603, and bus 604. The memory 601, the processor 602, and the communication interface 603 are communicatively connected to each other via a bus 604.

The memory 601 may be a ROM, a static storage device, a dynamic storage device, or a RAM. The memory 601 may store programs which, when executed by the processor 602 stored in the memory 601, the processor 602 and the communication interface 603 are used to instruct the base station a method of establishing a connection with a gateway station. The memory 601 may also store a data set, such as: a portion of the memory resources in memory 601 are divided into a data set storage module for storing data sets required to instruct the base station to establish a connection with the gateway station.

The processor 602 may be implemented as a general purpose Central Processing Unit (CPU), a microprocessor, an Application Specific Integrated Circuit (ASIC), a Graphics Processing Unit (GPU), or one or more Integrated circuits.

The processor 602 may also be an integrated circuit chip having signal processing capabilities. In implementation, some or all of the functions of the apparatus for instructing a base station to establish a connection with a gateway station of the present application may be performed by instructions in the form of hardware integrated logic circuits or software in the processor 602. The processor 602 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments described above in this application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory 601, and a processor 602 reads information in the memory 601, and completes, in combination with hardware thereof, part of functions of an apparatus for instructing a base station to establish a connection with a gateway station according to an embodiment of the present application.

The communication interface 603 enables communication between the computing device 600 and other devices or communication networks using transceiver modules such as, but not limited to, transceivers. For example, the data set may be acquired through the communication interface 603.

Bus 604 may include a pathway to transfer information between components of computing device 600 (e.g., memory 601, processor 602, communication interface 603).

When there are a plurality of the computing apparatuses 600, a communication path is established between each of the computing apparatuses 600 through a communication network. Any one or more of the above-described acquisition module 510, determination module 520, and indication module 530 are executed on each computing device 600. Any of the computing devices 600 may be a computing device (e.g., a server) in a cloud data center, or a computing device in an edge data center, or a terminal computing device.

The descriptions of the flows corresponding to the above-mentioned figures have respective emphasis, and for parts not described in detail in a certain flow, reference may be made to the related descriptions of other flows.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware or any combination thereof, and when the implementation is realized by software, all or part of the implementation may be realized in the form of a computer program product. The computer program product comprises one or more computer program instructions which, when loaded and executed on a device, cause a process or function according to an embodiment of the invention to be performed, in whole or in part. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optics, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by the device or a data storage device, such as a server, a data center, etc., that is integrated into one or more available media. The usable medium may be a magnetic medium (such as a floppy Disk, a hard Disk, a magnetic tape, etc.), an optical medium (such as a Digital Video Disk (DVD), etc.), or a semiconductor medium (such as a solid state Disk, etc.).

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only an example of the present invention and should not be taken as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

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Method and device for indicating connection establishment between base station and gateway station and computing equipment

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