Communication method and related apparatus

A communication method applied to a second terminal apparatus, wherein the method comprises:

• obtaining identifier information, wherein the identifier information identifies at least one of the following:
• a first terminal apparatus, the second terminal apparatus, a service of the first terminal apparatus, data of the first terminal apparatus, a service of the second terminal apparatus, or data of the second terminal apparatus;
• obtaining resource configuration information, wherein the resource configuration information is used to determine a first resource set of an energy-saving signal, the first resource set comprises at least one of the following:
• a frequency domain resource set, a time domain resource set, or a code domain resource set, and the energy-saving signal indicates the second terminal apparatus to wake up or indicates the second terminal apparatus to go to sleep, wherein the energy-saving signal is represented by an energy-saving signal sequence generated by using different cyclic shift values CSm indicating that the energy-saving signal sequence is used to wake up or go to sleep, wherein a wake-up signal (WUS) and a going-to-sleep signal (GTS) are a pair, and each pair of the cyclic shift values indicates the second terminal apparatus to listen to sidelink information from the first terminal apparatus or indicates the second terminal apparatus to go to sleep, wherein CSm≥2i, and i is a positive integer and m is an integer greater than or equal to 0;
• determining a first resource based on the identifier information and the first resource set, wherein the first resource belongs to the first resource set;
• and
• receiving the energy-saving signal from the first terminal apparatus on the first resource.

A first terminal apparatus, comprising a transceiver and a processor, wherein

• the transceiver is configured to cooperate with the processor to obtain identifier information, wherein the identifier information identifies at least one of the following:
• the first terminal apparatus, a second terminal apparatus, a service of the first terminal apparatus, data of the first terminal apparatus, a service of the second terminal apparatus, or data of the second terminal apparatus;
• the transceiver is further configured to cooperate with the processor to obtain resource configuration information, wherein the resource configuration information is used to determine a first resource set of an energy-saving signal, the first resource set comprises at least one of the following:
• a frequency domain resource set, a time domain resource set, or a code domain resource set, and the energy-saving signal indicates the second terminal apparatus to wake up or indicates the second terminal apparatus to go to sleep, wherein the energy-saving signal is represented by an energy-saving signal sequence generated by using different cyclic shift values CSm indicating that the energy-saving signal sequence is used to wake up or go to sleep, wherein a wake-up signal (WUS) and a going-to-sleep signal (GTS) are a pair, and each pair of the cyclic shift values indicates the second terminal apparatus to listen to sidelink information from the first terminal apparatus or indicates the second terminal apparatus to go to sleep, wherein CSm≥2i, and i is a positive integer and m is an integer greater than or equal to 0;
• the processor is configured to determine a first resource based on the identifier information and the first resource set, wherein the first resource belongs to the first resource set;
• and
• the transceiver is further configured to cooperate with the processor to send the energy-saving signal to the second terminal apparatus on the first resource.