Communication method and apparatus

A communication method, applied to an access network device, and comprising:

• receiving second indication information sent by a terminal when a difference between a first propagation delay and a second propagation delay is greater than a second threshold, wherein the second indication information indicates to reconfigure an uplink resource for the terminal, the first propagation delay is a propagation delay of a service link between the terminal and a first cell corresponding to a first satellite, the second propagation delay is a propagation delay of a service link between the terminal and a second cell corresponding to a second satellite, the first satellite is a satellite that provides a service for the terminal before the terminal is handed over, and the second satellite is a satellite that provides a service for the terminal after the terminal is handed over;
• and
• reconfiguring the uplink resource for the terminal based on the second indication information.

A communication apparatus, comprising one or more processors, wherein the one or more processors are configured to execute instructions that cause the apparatus to:

• receive first indication information from a first cell corresponding to a first satellite, wherein the first indication information indicates to the terminal to perform uplink synchronization with a second satellite without triggering a random access procedure;
• and
• after the terminal is within a coverage area of the second satellite, if a first synchronization signal and physical broadcast channel block (SSB) is the same as a second SSB, perform uplink synchronization with the second satellite without triggering the random access procedure, wherein the first SSB is used for communication between the terminal and the first satellite, and the second SSB is used for communication between the terminal and the second satellite.