Communication method and communication apparatus

1 . A communication method, wherein the method comprises:

determining, by a first communication apparatus, a first frequency domain resource, wherein the first frequency domain resource is determined from a frequency domain resource pool based on a sensing requirement parameter, wherein the sensing requirement parameter comprises an unambiguous ranging distance, the first frequency domain resource meets a minimum frequency baseline, and the minimum frequency baseline is determined based on the unambiguous ranging distance; and

sending, by the first communication apparatus, a sensing signal on the first frequency domain resource to a second communication apparatus.

2 . The method according to claim 1 , wherein the sensing requirement parameter comprises a ranging resolution.

3 . The method according to claim 1 , wherein the method further comprises receiving, by the first communication apparatus, the sensing requirement parameter.

4 . The method according to claim 3 , wherein the receiving, by the first communication apparatus, the sensing requirement parameter comprises:

receiving, by the first communication apparatus, the sensing requirement parameter from a third communication apparatus.

5 . The method according to claim 2 , wherein

the first frequency domain resource meets a maximum frequency baseline, and the maximum frequency baseline is based on the ranging resolution.

6 . The method according to claim 5 , wherein the first frequency domain resource comprises a frequency point combination, and the frequency point combination is a frequency point combination that meets a first condition;

the first condition comprises: frequency baselines formed by frequency points comprised in the frequency point combination comprise a frequency baseline of a first length; and

the first length is k*length of the minimum frequency baseline, k is a positive integer belonging to [1, K], K is a ratio of a length of the maximum frequency baseline to the length of the minimum frequency baseline, and K is greater than or equal to 1.

7 . The method according to claim 6 , wherein the frequency point combination comprises a subcarrier combination, and the subcarrier combination is a subcarrier combination with a smallest quantity of subcarriers in a subcarrier combination that meets the minimum frequency baseline, the maximum frequency baseline, and the first condition.

8 . The method according to claim 1 , wherein the method further comprises:

sending, by the first communication apparatus, first information to the second communication apparatus, wherein the first information indicates a frequency domain position of the first frequency domain resource.

9 . The method according to claim 8 , wherein

the first information comprises the frequency domain position of the first frequency domain resource; or

the first information comprises a sensing quality index, and the sensing quality index indicates the frequency domain position of the first frequency domain resource.

10 . The method according to claim 8 , wherein the first information is carried in radio resource control (RRC) signaling or downlink control information (DCI) signaling.

11 . The method according to claim 1 , wherein the method further comprises:

sending, by the first communication apparatus, trigger signaling to the second communication apparatus, wherein the trigger signaling is used to trigger the second communication apparatus to enable a sensing function.

12 . The method according to claim 11 , wherein a type of the trigger signaling comprises RRC signaling or DCI signaling.

13 . The method according to claim 1 , wherein the frequency domain resource pool comprises a frequency domain resource used to transmit a channel state information reference signal between the first communication apparatus and the second communication apparatus; or

the frequency domain resource pool comprises a frequency domain resource used to transmit communication data between the first communication apparatus and the second communication apparatus.

14 . A communication method, wherein the method comprises:

determining, by a second communication apparatus, a first frequency domain resource, wherein the first frequency domain resource is determined from a frequency domain resource pool based on a sensing requirement parameter, wherein the sensing requirement parameter comprises an unambiguous ranging distance, the first frequency domain resource meets a minimum frequency baseline, and the minimum frequency baseline is determined based on the unambiguous ranging distance;

receiving, by the second communication apparatus, a sensing signal on the first frequency domain resource from a first communication apparatus; and

performing, by the second communication apparatus, sensing measurement on the sensing signal to obtain a sensing result.

15 . The method according to claim 14 , wherein the sensing requirement parameter comprises a ranging resolution.

16 . The method according to claim 14 , wherein the method further comprises:

receiving, by the second communication apparatus, first information, wherein the first information indicates a frequency domain position of the first frequency domain resource.

17 . The method according to claim 16 , wherein the first information comprises the frequency domain position of the first frequency domain resource; or

the first information comprises a sensing quality index, and the sensing quality index indicates the frequency domain position of the first frequency domain resource.

18 . The method according to claim 14 , wherein the method further comprises:

receiving, by the second communication apparatus, the sensing requirement parameter.

19 . The method according to claim 15 , wherein

the first frequency domain resource meets a maximum frequency baseline, and the maximum frequency baseline is based on the ranging resolution.

20 . A communication apparatus, wherein the communication apparatus comprises a processor and a memory;

the memory is configured to store a computer program; and

the processor is configured to invoke and run the computer program stored in the memory, to enable the communication apparatus to perform operations of:

determining, by the communication apparatus, a first frequency domain resource, wherein the first frequency domain resource is determined from a frequency domain resource pool based on a sensing requirement parameter, wherein the sensing requirement parameter comprises an unambiguous ranging distance, the first frequency domain resource meets a minimum frequency baseline, and the minimum frequency baseline is determined based on the unambiguous ranging distance; and

sending, by the communication apparatus, a sensing signal on the first frequency domain resource to a second communication apparatus.