Reference signal receiving and sending method, device, and system

A reference signal receiving method, wherein the method is used in a plurality of cycles whose cycle lengths are a first cycle length, the plurality of cycles comprise a first cycle and a second cycle, the first cycle and the second cycle each comprise M first durations, the first duration comprises N paging occasions, and location distribution of paging occasions in the first cycle is the same as location distribution of paging occasions in the second cycle, wherein M is a positive integer, and N is a positive integer greater than 1;

• and the method comprises:
• determining, by a terminal device, a first target paging occasion that is in an mth first duration of the first cycle, wherein a relative location of the first target paging occasion in the first cycle is different from a relative location of a second target paging occasion in the second cycle, the second target paging occasion is a target paging occasion in an mth first duration of the second cycle, and m is any positive integer less than or equal to M;
• determining, by the terminal device based on the first target paging occasion, a time domain resource that is in the mth first duration of the first cycle, wherein the time domain resource is a time domain resource of a time-frequency resource used to transmit a reference signal;
• and
• receiving, by the terminal device on the time-frequency resource, the reference signal that is from a network device.

A communications apparatus, wherein the communications apparatus is used in a plurality of cycles whose cycle lengths are a first cycle length, the plurality of cycles comprise a first cycle and a second cycle, the first cycle and the second cycle each comprise M first durations, the first duration comprises N paging occasions, and location distribution of paging occasions in the first cycle is the same as location distribution of paging occasions in the second cycle, wherein M is a positive integer, and N is a positive integer greater than 1;

• and the communications apparatus comprises at least one processor and a transceiver, wherein
• the at least one processor is configured to determine a first target paging occasion that is in an mth first duration of the first cycle, wherein a relative location of the first target paging occasion in the first cycle is different from a relative location of a second target paging occasion in the second cycle, the second target paging occasion is a target paging occasion in an mth first duration of the second cycle, and m is any positive integer less than or equal to M;
• the at least one processor is further configured to determine, based on the first target paging occasion, a time domain resource that is in the mth first duration of the first cycle, wherein the time domain resource is a time domain resource of a time-frequency resource used to transmit a reference signal;
• and
• the transceiver is configured to send the reference signal to a terminal device on the time-frequency resource.

A communications apparatus, wherein the communications apparatus is used in a plurality of cycles whose cycle lengths are a first cycle length, the plurality of cycles comprise a first cycle and a second cycle, the first cycle and the second cycle each comprise M first durations, the first duration comprises N paging occasions, and location distribution of paging occasions in the first cycle is the same as location distribution of paging occasions in the second cycle, wherein M is a positive integer, and N is a positive integer greater than 1;

• and the communications apparatus comprises at least one processor and a transceiver, wherein
• the at least one processor is configured to determine a first target paging occasion that is in an mth first duration of the first cycle, wherein a relative location of the first target paging occasion in the first cycle is different from a relative location of a second target paging occasion in the second cycle, the second target paging occasion is a target paging occasion in an mth first duration of the second cycle, and m is any positive integer less than or equal to M;
• the at least one processor is further configured to determine, based on the first target paging occasion, a time domain resource that is in the mth first duration of the first cycle, wherein the time domain resource is a time domain resource of a time-frequency resource used to transmit a reference signal;
• and
• the transceiver is configured to receive, on the time-frequency resource, the reference signal that is from a network device.