Random access resource selection method, terminal device and network device

A terminal device, comprising:

• a processor and a memory, wherein the memory is configured to store a computer program, which when executed by the processor, causes the processor to:
• select a random access resource based on at least one of predefined manners, wherein the predefined manners comprise:
• selection based on a round-trip time (RTT) acquired by the terminal device;
• selection based on an absolute distance of a service link;
• selection based on a delay compensation of a feeder link, wherein the delay compensation of the feeder link is determined by the network device according to a time synchronization reference point specified by a serving cell, wherein the time synchronization reference point comprises a point between the serving satellite and the network device;
• selection based on service identity information for triggering a random access procedure by the terminal device;
• selection based on a terminal type of the terminal device;
• and
• selection based on an access probability parameter;
• wherein the processor is further caused to:
• determine whether a measurement result of a target cell or the serving cell is greater than or equal to a fourth threshold;
• and
• if yes, the terminal device performs said selecting the random access resource based on the at least one of predefined manners;
• and otherwise, the terminal device selects a four-step type random access resource.