Reference signal sending method, reference signal receiving method, and communications apparatus

A method, comprising:

• determining a resource set, wherein the resource set is allocated to be used to carry a demodulation reference signal and downlink data, the demodulation reference signal is usable to demodulate the downlink data, the resource set comprises a first time-frequency resource group and a second time-frequency resource group, the first time-frequency resource group comprises reserved time-frequency resources, and the second time-frequency resource group is allocated to be used to carry the demodulation reference signal;
• in response to the first time-frequency resource group and the second time-frequency resource group overlapping, determining a third time-frequency resource group based on a location of the second time-frequency resource group and an offset, wherein the offset is determined according to a preset rule;
• and
• receiving the demodulation reference signal using the third time-frequency resource group.

An apparatus, comprising:

• at least one processor;
• and
• a non-transitory memory storing instructions that are executable by the at least one processor, wherein the instructions, when executed by the at least one processor, instruct the at least one processor to:
• determine a resource set, wherein the resource set is allocated to be used to carry a demodulation reference signal and downlink data, the demodulation reference signal is usable to demodulate the downlink data, the resource set comprises a first time-frequency resource group and a second time-frequency resource group, the first time-frequency resource group comprises reserved time-frequency resources, and the second time-frequency resource group is allocated to be used to carry the demodulation reference signal;
• in response to the first time-frequency resource group and the second time-frequency resource group overlapping, determine a third time-frequency resource group based on a location of the second time-frequency resource group and an offset, wherein the offset is determined according to a preset rule;
• and
• send the demodulation reference signal using the third time-frequency resource group.