Communication method, apparatus, and system

A communication apparatus, comprising:

• at least one processor;
• and
• a non-transitory memory configured to store a computer program, the computer program comprising program instructions that, when executed by the at least one processor, cause the communication apparatus to perform:
• receiving first policy information from a policy control function network element, wherein the first policy information indicates a first relay mode corresponding to a first application of a first terminal, and the first relay mode is a layer-3 user equipment (UE)-to-network relay without a non-3GPP interworking function network element (N3IWF);
• determining the first relay mode for the first application based on the first policy information indicating the first relay mode corresponding to the first application of the first terminal;
• and
• transmitting data of the first application in the first relay mode to a relay device.

A non-transitory computer readable medium storing a computer program code for execution by a processor of a terminal, the computer program code comprising instructions for:

• receiving first policy information from a policy control function network element, wherein the first policy information indicates a first relay mode corresponding to a first application of the terminal, and the first relay mode is a layer-3 user equipment (UE)-to-network relay without a non-3GPP interworking function network element (N3IWF);
• determining the first relay mode for the first application based on the first policy information indicating the first relay mode corresponding to the first application of the terminal;
• and
• transmitting data of the first application in the first relay mode to a relay device.