Random access method and apparatus applicable to satellite communication

A communications apparatus, comprising:

• one or more processors;
• and
• a memory, configured to store one or more programs, wherein
• when the one or more programs are executed by the one or more processors, the one or more processors are enabled to:
• obtain a round-trip transmission latency tRTD of a signal between the communications apparatus and a satellite;
• obtain a random access parameter based on the round-trip transmission latency, wherein the random access parameter comprises one or more of the following:
• tX, tY, tbackoff, and tsubframe, wherein tX represents duration between a moment at which the communications apparatus sends a random access preamble and a moment at which the communications apparatus starts to receive a random access response (RAR), tY represents duration of a window in which the communications apparatus receives the RAR, tbackoff represents duration between a moment at which the communications apparatus stops receiving the RAR and a moment at which the communications apparatus sends the random access preamble again, and tsubframe represents subframe duration;
• and
• receive the RAR based on the random access parameter.

A non-transitory computer-readable storage medium, wherein the computer-readable storage medium stores instructions, and when the instructions are run on a computer, the instructions cause the computer to:

• obtain a round-trip transmission latency tRTD of a signal between the computer and a satellite;
• obtain a random access parameter based on the round-trip transmission latency, wherein the random access parameter comprises one or more of the following:
• tX, tY, tbackoff, and tsubframe, wherein tX represents duration between a moment at which the computer sends a random access preamble and a moment at which the computer starts to receive a random access response (RAR), tY represents duration of a window in which the computer receives the RAR, tbackoff represents duration between a moment at which the computer stops receiving the RAR and a moment at which the computer sends the random access preamble again, and tsubframe represents subframe duration;
• and
• receive, the RAR based on the random access parameter.