Sensing method and communication apparatus

A sensing method, comprising:

• receiving, by a second communication apparatus, first information from a first communication apparatus, wherein the first information indicates a pulse repetition interval PRI;
• interval (PRI);
• and
• sending, by the second communication apparatus, a reference signal based on the first information, wherein the reference signal is used by the first communication apparatus to sense a to-be-sensed target, and a periodicity of the reference signal in time domain is less than or equal to the PRI.

A communication apparatus, comprising:

• a processor;
• and
• a memory having instructions stored thereon that, when executed by the processor, cause the communication apparatus to:
• determine first information, wherein the first information indicates a pulse repetition interval PRI;
• interval (PRI);
• send the first information to a second communication apparatus, wherein the first information is used by the second communication apparatus to send a reference signal, and a periodicity of the reference signal in time domain is less than or equal to the PRI;
• receive the reference signal from the second communication apparatus;
• and
• sense a to-be-sensed target based on the reference signal.