Uplink signal synchronization method and communication apparatus

A communication apparatus, comprising at least one processor coupled to a memory, wherein

• the memory is configured to store a program or instructions;
• and
• the at least one processor is configured to execute the program or the instructions, so that the apparatus is enabled to:
• obtain first indication information, wherein the first indication information indicates a first duration, the first duration is a validity duration of synchronization information, and the synchronization information is used for uplink signal synchronization;
• obtain second indication information;
• and
• perform the uplink signal synchronization, based on the second indication information, within the first duration beginning after the obtaining of the second indication information, wherein the uplink signal synchronization comprises at least one of time domain offset compensation or frequency domain offset compensation, and the second indication information indicates the synchronization information.