Communication method and communication apparatus

A communication method, comprising:

• sending first indication information;
• and
• sending a first signal in M time units in a first time period, wherein
• the first indication information comprises information indicating the M time units occupied by the first signal in the first time period;
• or the first indication information comprises information indicating the M time units occupied by the first signal in the first time period, and at least one of:
• information used to determine a first signal sequence or information used to determine a time domain coefficient of the first signal;
• or the first indication information comprises information used to determine a first signal sequence and information used to determine a time domain coefficient of the first signal, wherein the first signal sequence and the time domain coefficient of the first signal are used to determine the first signal;
• and
• a value of M belongs to a first value set, and the first value set comprises a part or all of 40, 44, 64, 70, 71, 80, 81, 123, 128, 142, 160, 256, 283, or 320.

A communication apparatus, comprising:

• a transceiver, configured to:
• receive first indication information;
• and receive a first signal in M time units in a first time period based on the first indication information;
• and
• a processor, configured to perform sensing by using the first signal, wherein
• the first indication information comprises information indicating the M time units occupied by the first signal in the first time period;
• or the first indication information comprises information indicating the M time units occupied by the first signal in the first time period, and at least one of:
• information used to determine a first signal sequence or information used to determine a time domain coefficient of the first signal;
• or the first indication information comprises information used to determine a first signal sequence and information used to determine a time domain coefficient of the first signal, wherein the first signal sequence and the time domain coefficient of the first signal are used to determine the first signal;
• and
• a value of M belongs to a first value set, and the first value set comprises a part or all of 40, 44, 64, 70, 71, 80, 81, 123, 128, 142, 160, 256, 283, or 320.