Communication method, apparatus, and system

A communication apparatus, comprising:

• at least one processor;
• and
• a non-transitory memory having instructions stored there on that, when executed by the at least one processor, cause the apparatus to:
• determine, based on area configuration information of a first cell of a network device and location information of a terminal device, a first sub-area corresponding to the terminal device, wherein the area configuration information indicates information about a plurality of sub-areas corresponding to the first cell, and the plurality of sub-areas comprise the first sub-area;
• and
• obtain satellite ephemeris information corresponding to the first sub-area, wherein
• to obtain the satellite ephemeris information corresponding to the first sub-area, the communication apparatus is caused to:
• send first indication information to the network device, to request to obtain the satellite ephemeris information corresponding to the first sub-area, wherein the first indication information comprises a first preamble corresponding to the first sub-area, and wherein the sending of the first indication information to the network device comprises sending the first preamble to the network device on a first access resource corresponding to the first sub-area;
• and
• receive the satellite ephemeris information corresponding to the first sub-area from the network device, and
• the satellite ephemeris information corresponding to the first sub-area comprises one or more of the following:
• first satellite ephemeris information of a first satellite in the first sub-area at a current moment, second satellite ephemeris information of a second satellite that is to run to the first sub-area at a first time, third satellite ephemeris information of a third satellite that is in a neighboring area of the first sub-area at the current moment, or fourth satellite ephemeris information of a fourth satellite that is to run to the neighboring area of the first sub-area at second time.

A communication apparatus, comprising:

• at least one processor;
• and
• a non-transitory memory having instructions stored there on that, when executed by the at least one processor, cause the apparatus to:
• determine a plurality of sub-areas corresponding to a first cell of a network device;
• send area configuration information to a terminal device, wherein the area configuration information indicates information about the plurality of sub-areas corresponding to the first cell, the plurality of sub-areas comprise a first sub-area, the area configuration information is used by the terminal device to obtain satellite ephemeris information corresponding to the first sub-area, and the terminal device is located in the first sub-area;
• receive first indication information from the terminal device, wherein the first indication information requests to obtain the satellite ephemeris information corresponding to the first sub-area, wherein the first indication information comprises a first preamble corresponding to the first sub-area, and wherein the receiving of the first indication information from the terminal device comprises receiving the first preamble from the terminal device on a first access resource corresponding to the first sub-area;
• and
• send the satellite ephemeris information corresponding to the first sub-area to the terminal device,
• wherein
• the satellite ephemeris information corresponding to the first sub-area comprises one or more of the following:
• first satellite ephemeris information of a first satellite in the first sub-area at a current moment, second satellite ephemeris information of a second satellite that is to run to the first sub-area at a first time, third satellite ephemeris information of a third satellite that is in a neighboring area of the first sub-area at the current moment, or fourth satellite ephemeris information of a fourth satellite that is to run to the neighboring area of the first sub-area at second time.