Service uninterrupted satellite following method with high utilization rate of gateway station antenna

Abstract

The invention discloses a high-utilization-rate service uninterrupted satellite following method for a gateway station antenna, and belongs to the technical field of low-orbit satellite communication. According to the method, satellites which do not run out of a view field at the same time in a visible range of a gateway station are divided into N satellite clusters according to ephemeris, the number of satellites in each satellite cluster is M1, M2,..., MN, and the remaining K satellites are satellites which run out of a view field area at the same time. In order to ensure that the feed links are not interrupted, the gateway station at least needs (M1 + 1) + (M2 + 1) +,..., + (MN + 1) + 2K antennas to carry out relay tracking, and M1 + + M2 +,..., + MN + K uninterrupted feed links are established in total. The antennas of the satellites in the cluster are guaranteed to always keep one antenna in a to-be-relayed state at each moment, and K antennas in the remaining 2K antennas are always kept in the to-be-relayed state. According to the method, a small-scale number of antennas are used for tracking a visual satellite at a gateway station of a low-orbit satellite communication system, so that the switching satellite feed link service is ensured not to be interrupted; compared with a traditional method that each satellite needs to be provided with two antennas to keep uninterrupted feed, the deployment scale of the antennas of the gateway station is reduced, and the utilization efficiency of the antennas is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of low-orbit satellite communications, and in particular relates to a method for uninterrupted satellite tracking with high utilization of a gateway station antenna. Background Art

[0002] In satellite communication systems, gateway stations serve as system management and control centers and information exchange hubs. They manage and control satellite payloads and remote users by establishing feeder links with satellites, and support interoperability between remote users and ground network users. In satellite communication systems built on low-orbit constellations, due to the rapid movement of satellites relative to the ground, the gateway station's visibility of a single low-orbit satellite is generally on the order of ten minutes. To ensure uninterrupted feeder services, the gateway station typically configures two antennas for one feeder link, and relay tracking is used between the antennas to maintain an uninterrupted feeder link. When multiple uninterrupted feeder links need to be established, the gateway station needs to configure an independent relay tracking antenna for each feeder link. The number of relay tracking antennas required for all feeder links is not considered, resulting in low antenna utilization. Summary of the Invention

[0003] In view of this, the present invention proposes a method for uninterrupted satellite tracking with high utilization of gateway station antennas, aiming to solve the problem of low antenna utilization caused by ensuring uninterrupted feed links when the gateway station tracks low-orbit satellites.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] A method for tracking satellites with uninterrupted services and high utilization of a gateway station antenna comprises the following steps:

[0006] Step 1: First, determine the number of satellites M within the field of view of the gateway station and the time when each of the M satellites moves out of the field of view of the gateway station based on the ephemeris information;

[0007] Step 2: Number the M satellites from 1 to T in the order in which they leave the field of view of the gateway station, where T≤M. The smaller the number, the earlier they leave the field of view of the gateway station. Satellites that leave the field of view of the gateway station have the same number.

[0008] Step 3, sort the numbered satellites in ascending order of numbers;

[0009] Step 4: Build an empty satellite cluster and select T satellites numbered from 1 to T to add to the current satellite cluster;

[0010] Step 5: construct an empty satellite cluster, and select all satellites with different numbers from the remaining satellites that have not yet been added to any satellite cluster and add them to the current satellite cluster;

[0011] Step 6: Iterate step 5 until the remaining satellites have the same number; the number of satellite clusters is recorded as N, and the number of satellites in the nth satellite cluster is recorded as M. n , n=1,2,3,…,N; the number of satellites with the same number remaining at the end is recorded as K;

[0012] Step 7: Allocate M to the nth satellite cluster n +1 antenna for establishing M n Uninterrupted feeding links; 2K antennas are allocated to the last K remaining satellites with the same number, which are used to simultaneously establish K uninterrupted feeding links; and a method for uninterrupted satellite tracking with high utilization of the gateway station antenna is implemented.

[0013] Furthermore, when selecting satellites to join the satellite cluster in steps 4 and 5, any one of the satellites with the same number is selected as the selection object.

[0014] Furthermore, the specific method of step 7 is:

[0015] For the nth satellite cluster, using M n Antennas to build M n Based on the feeder link, the Mth n +1 antenna is rotated in advance according to the ephemeris to the position where the next satellite is about to enter the field of view of the gateway station;

[0016] When one of the satellites in the nth satellite cluster moves out of the field of view of the gateway station, the Mth satellite cluster n +1 antenna establishes a feed link with the satellite that has just entered the field of view of the gateway station, and releases the antenna of the satellite that is currently running out of the field of view of the gateway station, and rotates to the next satellite that is about to enter the field of view of the gateway station, ensuring that M is established at the same time at every moment. n Uninterruptible feeder links;

[0017] For the last K satellites with the same number, K antennas are used to establish K feeder links. The remaining K antennas are then rotated in advance according to the ephemeris to positions where they will enter the field of view of the gateway station.

[0018] When K satellites leave the field of view of the gateway station, the remaining K antennas establish feeder links with the K satellites that have just entered the field of view of the gateway station, and release the antennas of the K satellites that are currently leaving the field of view of the gateway station and rotate to the satellite that is about to enter the field of view of the gateway station, ensuring that K feeder links are established at the same time at every moment.

[0019] Compared with the background technology, the present invention has the following advantages:

[0020] The present invention can make full use of the ephemeris to classify and cluster the visible satellites of the gateway station, realize a shared antenna pool for the satellites in the cluster, and improve the antenna utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. 1 is a schematic diagram of numbering and clustering of visible satellites at a gateway station according to an embodiment of the present invention.

[0022] Figure 2 Schematic diagram of a satellite tracking method for antennas in a satellite cluster that do not simultaneously move out of view according to an embodiment of the present invention.

[0023] Figure 3 Schematic diagram of an antenna tracking method for simultaneously operating satellites outside the field of view area according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings.

[0025] A method for uninterrupted satellite tracking with high utilization of gateway station antennas. Figure 1 The satellites within the gateway's visible range are numbered and clustered in the order they exit the field of view. Cluster 1 is numbered {1, 2, 3, 4}, Cluster 2 is numbered {1, 2, 3}, and the remaining satellites are numbered {3, 3}. Clusters 1 and 2 are satellites that exit the field of view at different times, while the remaining satellites exit the field of view at the same time.

[0026] Figure 2 Given Figure 1 The antenna configuration of the gateway station and the uninterrupted satellite tracking method for satellite cluster 2 that are not operating out of the field of view at the same time.

[0027] Figure 3 Given Figure 1 The antenna configuration of the gateway station and the uninterrupted satellite tracking method are operated simultaneously with the satellites out of view.

[0028] Specifically, the method includes the following steps:

[0029] Step 1: First, determine the number of satellites M within the field of view of the gateway station and the time when each of the M satellites moves out of the field of view of the gateway station based on the ephemeris information;

[0030] Step 2: Number the M satellites from 1 to T in the order in which they leave the field of view of the gateway station, where T≤M. The smaller the number, the earlier they leave the field of view of the gateway station. Satellites that leave the field of view of the gateway station have the same number.

[0031] Step 3, sort the numbered satellites in ascending order of numbers;

[0032] Step 4: Build an empty satellite cluster and select T satellites numbered from 1 to T to add to the current satellite cluster;

[0033] Step 5: construct an empty satellite cluster, and select all satellites with different numbers from the remaining satellites that have not yet been added to any satellite cluster and add them to the current satellite cluster;

[0034] Step 6: Iterate step 5 until the remaining satellites have the same number; the number of satellite clusters is recorded as N, and the number of satellites in the nth satellite cluster is recorded as M. n , n=1,2,3,…,N; the number of satellites with the same number remaining at the end is recorded as K;

[0035] Step 7: Allocate M to the nth satellite cluster n +1 antenna for establishing M n Uninterrupted feeding links; 2K antennas are allocated to the last K remaining satellites with the same number, which are used to simultaneously establish K uninterrupted feeding links; and a method for uninterrupted satellite tracking with high utilization of the gateway station antenna is implemented.

[0036] Furthermore, when selecting satellites to join the satellite cluster in steps 4 and 5, any one of the satellites with the same number is selected as the selection object.

[0037] Furthermore, the specific method of step 7 is:

[0038] For the nth satellite cluster, using M n Antennas to build M n Based on the feeder link, the Mth n +1 antenna is rotated in advance according to the ephemeris to the position where the next satellite is about to enter the field of view of the gateway station;

[0039] When one of the satellites in the nth satellite cluster moves out of the field of view of the gateway station, the Mth satellite cluster n +1 antenna establishes a feed link with the satellite that has just entered the field of view of the gateway station, and releases the antenna of the satellite that is currently running out of the field of view of the gateway station, and rotates to the next satellite that is about to enter the field of view of the gateway station, ensuring that M is established at the same time at every moment. n Uninterruptible feeder links;

[0040] For the last K satellites with the same number, K antennas are used to establish K feeder links. The remaining K antennas are then rotated in advance according to the ephemeris to positions where they will enter the field of view of the gateway station.

[0041] When K satellites leave the field of view of the gateway station, the remaining K antennas establish feeder links with the K satellites that have just entered the field of view of the gateway station, and release the antennas of the K satellites that are currently leaving the field of view of the gateway station and rotate to the satellite that is about to enter the field of view of the gateway station, ensuring that K feeder links are established at the same time at every moment.

[0042] Those skilled in the art will appreciate that the embodiments described are intended to help readers understand the principles of the present invention and should be understood that the scope of protection of the present invention is not limited to the embodiments described. It will be apparent to those skilled in the art that various modifications and variations are possible in the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A method for tracking satellites with high utilization of gateway antennas, characterized in that: The following steps are involved: Step 1: First, determine the number of satellites M within the field of view of the gateway station and the time when each of the M satellites moves out of the field of view of the gateway station based on the ephemeris information; Step 2: Number the M satellites from 1 to T in the order in which they leave the field of view of the gateway station, where T≤M. The smaller the number, the earlier they leave the field of view of the gateway station. Satellites that leave the field of view of the gateway station have the same number. Step 3, sort the numbered satellites in ascending order of numbers; Step 4: Build an empty satellite cluster and select T satellites numbered from 1 to T to add to the current satellite cluster; Step 5: construct an empty satellite cluster, and select all satellites with different numbers from the remaining satellites that have not yet been added to any satellite cluster and add them to the current satellite cluster; Step 6: Iterate step 5 until the remaining satellites have the same number; the number of satellite clusters is recorded as N, and the number of satellites in the nth satellite cluster is recorded as M. n , n=1,2,3,…,N; the number of satellites with the same number remaining at the end is recorded as K; Step 7: Allocate M to the nth satellite cluster n +1 antenna for establishing M n Uninterrupted feeding links; 2K antennas are allocated to the last K remaining satellites with the same number, which are used to simultaneously establish K uninterrupted feeding links; and a method for uninterrupted satellite tracking with high utilization of the gateway station antenna is implemented.

2. The method for uninterrupted satellite tracking with high utilization of gateway antennas according to claim 1, characterized in that: When selecting satellites to join the satellite cluster in steps 4 and 5, any one of the satellites with the same number is selected as the selection object.

3. The method for tracking satellites with high utilization of gateway antennas according to claim 1, characterized in that: The specific method of step 7 is: For the nth satellite cluster, using M n Antennas to build M n Based on the feeder link, the Mth n +1 antenna is rotated in advance according to the ephemeris to the position where the next satellite is about to enter the field of view of the gateway station; When one of the satellites in the nth satellite cluster moves out of the field of view of the gateway station, the Mth satellite cluster n +1 antenna establishes a feed link with the satellite that has just entered the field of view of the gateway station, and releases the antenna of the satellite that is currently running out of the field of view of the gateway station, and rotates to the next satellite that is about to enter the field of view of the gateway station, ensuring that M is established at the same time at every moment. n Uninterruptible feeder links; For the last K satellites with the same number, K antennas are used to establish K feeder links. The remaining K antennas are then rotated in advance according to the ephemeris to positions where they will enter the field of view of the gateway station. When K satellites leave the field of view of the gateway station, the remaining K antennas establish feeder links with the K satellites that have just entered the field of view of the gateway station, and release the antennas of the K satellites that are currently leaving the field of view of the gateway station and rotate to the satellite that is about to enter the field of view of the gateway station, ensuring that K feeder links are established at the same time at every moment.

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