| CPC H04W 56/0045 (2013.01) | 20 Claims |

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1. A communication method, comprising:
receiving, by a terminal device, a first message from a satellite, wherein the first message includes target adjustment information;
receiving, by the terminal device, a second message, wherein the second message includes a timing advance (TA);
determining, by the terminal device based on the target adjustment information, a delay time;
determining, by the terminal device based on the TA, a first uplink sending time; and
adjusting, by the terminal device, an uplink sending time by delaying the first uplink sending time with the delay time,
wherein the method further comprises:
after sending a message msg3, starting, by the terminal device, a first timer after a preset duration, wherein the first timer monitors a contention resolution message msg4.
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