Communication method, network device, and first relay device

A communication method performed by a communication apparatus, comprising:

• receiving first information from a network device, wherein the first information indicates a first time unit, a second time unit, and a first phase;
• and
• performing downlink forwarding in the first time unit and the second time unit, wherein
• the second time unit is superimposed with the first phase compared with the first time unit when the communication apparatus performs downlink forwarding.

A communication apparatus, wherein the communication apparatus comprises at least one processor and a memory coupled to the at least one processor, the memory stores a computer program for execution by the at least one processor to enable the communication apparatus to perform the following steps:

• sending first information to a first relay device, wherein the first information indicates a first time unit, a second time unit, and a first phase;
• sending a first reference signal to a terminal device in the first time unit and the second time unit;
• and
• receiving second information from the terminal device, wherein
• the second information indicates a first phase difference or a precoding matrix index (PMI), wherein the first phase difference is associated with the first reference signal, the first phase difference and the first phase are used to determine an association relationship between the first relay device and the terminal device,
• the PMI indicates a precoding matrix associated with the first reference signal, and the PMI and the first phase are used to determine an association relationship between the first relay device and the terminal device.

A communication apparatus, wherein the communication apparatus comprises at least one processor and a memory coupled to the at least one processor, the memory stores a computer program for execution by the at least one processor to enable the communication apparatus to perform the following steps:

• receiving first information from a network device, wherein the first information indicates a first time unit, a second time unit, and a first phase;
• and
• performing downlink forwarding in the first time unit and the second time unit, wherein
• the second time unit is superimposed with the first phase compared with the first time unit when the communication apparatus performs downlink forwarding.