Satellite communication method and apparatus, terminal device, satellite, and readable storage medium
The present disclosure provides example satellite communication method, terminal device, and computer-readable storage medium. One example method includes receiving a first system message sent by a first satellite, where the first system message indicates a mean anomaly of the first satellite at an ephemeris reference time. A topology of a satellite network to which the first satellite belongs is determined based on the first system message.
1. A satellite communication method, comprising:
receiving a first system message sent by a first satellite in a satellite network, wherein the first system message comprises an identifier of the first satellite, an ephemeris reference time, and a mean anomaly of the first satellite to indicate the mean anomaly of the first satellite at the ephemeris reference time;
determining, based on the first system message, position information of the first satellite and other satellites in the satellite network; and
determining, based on the position information, a topology of the satellite network.
2. The method according to claim 1 , wherein the first system message further comprises at least one of an identifier of a satellite that is currently online or an identifier of a satellite that is currently offline.
3. The method according to claim 1 , the method further comprises: before receiving the first system message, sending a first request message to the first satellite, wherein the first request message requests the first satellite to send the first system message.
4. The method according to claim 1 , wherein the method further comprises:
before receiving the first system message, sending a second request message to a second satellite, wherein the second request message requests to obtain ephemeris parameters of the second satellite; and
receiving a second system message sent by the second satellite, wherein the second system message indicates the ephemeris parameters of the second satellite.
5. The method according to claim 4 , wherein the second system message comprises a square root of a semi-major axis of an orbit, an eccentricity, an argument of perigee, an orbital plane inclination angle at a reference time, and a longitude of an ascending node that are of the satellite network.
6. The method according to claim 5 , wherein the second system message further comprises an identifier of the second satellite, an ephemeris reference time of the second satellite, and a mean anomaly of the second satellite at the ephemeris reference time of the second satellite.
7. A terminal device, comprising at least one processor coupled to one or more memories, wherein the at least one processor executes instructions stored in the one or more memories to cause the terminal device to perform operations comprising:
receiving a first system message sent by a first satellite in a satellite network, wherein the first system message comprises an identifier of the first satellite, an ephemeris reference time, and a mean anomaly of the first satellite to indicate the mean anomaly of the first satellite at the ephemeris reference time;
determining, based on the first system message, position information of the first satellite and other satellites in the satellite network; and
determining, based on the position information, a topology of the satellite network.
8. The terminal device according to claim 7 , wherein the first system message further comprises at least one of an identifier of a satellite that is currently online or an identifier of a satellite that is currently offline.
9. The terminal device according to claim 7 , wherein the operations further comprise: before receiving the first system message, sending a first request message to the first satellite, wherein the first request message requests the first satellite to send the first system message.
10. The terminal device according to claim 7 , wherein the operations further comprise: before receiving the first system message, sending a second request message to a second satellite, wherein the second request message requests to obtain ephemeris parameters of the second satellite; and receiving a second system message sent by the second satellite, wherein the second system message indicates the ephemeris parameters of the second satellite.
11. The terminal device according to claim 10 , wherein the second system message comprises a square root of a semi-major axis of an orbit, an eccentricity, an argument of perigee, an orbital plane inclination angle at a reference time, and a longitude of an ascending node that are of the satellite network.
12. The terminal device according to claim 11 , wherein the second system message further comprises an identifier of the second satellite, the ephemeris reference time of the second satellite, and a mean anomaly of the second satellite at the ephemeris reference time of the second satellite.
13. A non-transitory computer-readable storage medium storing computer instructions that when executed by a computer, cause the computer to perform operations comprising:
receiving a first system message sent by a first satellite in a satellite network, wherein the first system message comprises an identifier of the first satellite, an ephemeris reference time, and a mean anomaly of the first satellite to indicate the mean anomaly of the first satellite at the ephemeris reference time;
determining, based on the first system message, position information of the first satellite and other satellites in the satellite network; and
determining, based on the position information, a topology of the satellite network.
14. The non-transitory computer-readable storage medium according to claim 13 , wherein the first system message further comprises at least one of an identifier of a satellite that is currently online/or an identifier of a satellite that is currently offline.
15. The non-transitory computer-readable storage medium according to claim 13 , wherein the operations further comprise:
before receiving the first system message, sending a first request message to the first satellite, wherein the first request message requests the first satellite to send the first system message.
16. The non-transitory computer-readable storage medium according to claim 13 , wherein the operations further comprise:
before receiving the first system message, sending a second request message to a second satellite, wherein the second request message requests to obtain ephemeris parameters of the second satellite; and
receiving a second system message sent by the second satellite, wherein the second system message indicates the ephemeris parameters of the second satellite.
17. The non-transitory computer-readable storage medium according to claim 16 , wherein the second system message comprises a square root of a semi-major axis of an orbit, an eccentricity, an argument of perigee, an orbital plane inclination angle at a reference time, and a longitude of an ascending node that are of the satellite network.