Method for selecting relay device, remote device and relay device

A remote device, comprising:

• a processor;
• and
• a transceiver connected to the processor, wherein
• the processor is configured to select a first relay device from among at least one relay device on a basis of at least one relay mode to which the remote device is able to adapt and at least one relay mode which is able to be provided by the at least one relay device, wherein
• the first relay device is used for implementing a communication between the remote device and a network device, and at least one relay mode which is able to be provided by the first relay device matches the at least one relay mode to which the remote device is able to adapt, and
• the at least one relay mode which is able to be provided by the at least one relay device corresponds to a piece of reference information comprising a Relay Service Code (RSC), and the processor is further configured to:
• determine, according to the piece of reference information and a first correspondence, the at least one relay mode which is able to be provided by the at least one relay device, wherein
• the first correspondence comprises a correspondence between at least one piece of reference information and at least one relay mode which is able to be provided by a relay device, and the at least one relay mode which is able to be provided by the at least one relay device comprises a relay mode based on a Non-3rd Generation Partnership Project (3GPP) Inter Working Function (N3IWF).

A relay device, comprising:

• a processor;
• and
• a transceiver connected to the processor, wherein
• the transceiver is configured to send a first message to a remote device, wherein the first message is used to indicate at least one relay mode which is able to be provided by the relay device, the at least one relay mode which is able to be provided by the relay device corresponds to a piece of reference information comprising a Relay Service Code (RSC), the piece of reference information is carried in the first message, and is used for the remote device to determine the at least one relay mode which is able to be provided by the relay device based on the piece of reference information and a first correspondence, and wherein the at least one relay mode which is able to be provided by the relay device comprises a relay mode based on a Non-3rd Generation Partnership Project (3GPP) Inter Working Function (N3IWF), and
• the first message is a discovery message or a response message for a relay solicitation message sent by the remote device.