Communication method and apparatus

A communication method performed by a second terminal device or a chip in the second terminal device, comprising:

• receiving a first message from a first terminal device, wherein the second terminal device and the first terminal device perform relay communication via a first relay device, wherein the first message comprises an identifier of at least one candidate relay device, a relay reselection indication indicating to change a relay device, and an address of the at least one candidate relay device, and the address of the at least one candidate relay device is a layer 2 identifier, wherein a status of a signal between the at least one candidate relay device and the first terminal device satisfies a first preset condition;
• obtaining, based on the address of the at least one candidate relay device, a status of a signal between the at least one candidate relay device and the second terminal device;
• determining, based on the status of the signal between each of the at least one candidate relay device and the second terminal device, a second relay device from the at least one candidate relay device;
• and
• sending indication information to the first terminal device, wherein the indication information indicates to change a relay device between the second terminal device and the first terminal device to the second relay device, the indication information comprises an identifier of the second relay device, and the indication information is carried by a link modification request message.

A communication apparatus, comprising:

• at least one processor;
• and
• a non-transitory computer-readable storage medium storing a program to be executed by the at least one processor, the program including instructions for:
• determining a candidate relay device set, wherein the candidate relay device set comprises at least one candidate relay device, and a status of a signal between the at least one relay device and the communication apparatus satisfies a first preset condition;
• and
• sending a first message to a second terminal device, wherein the second terminal device and the communication apparatus perform relay communication via a first relay device, wherein the first message comprises an identifier of the at least one candidate relay device, a relay reselection indication indicating to change a relay device, and an address of the at least one candidate relay device, wherein the address of the at least one candidate relay device is for obtaining a status of a communication link between the second terminal device and the at least one candidate relay device, and the address of the at least one candidate relay device is a layer 2 identifier;
• and
• receiving indication information from the second terminal device based on the first message, wherein the indication information indicates to change a relay device between the second terminal device and the communication apparatus to a second relay device, wherein the at least one candidate relay device comprises the second relay device, the indication information comprises an identifier of the second relay device, and the indication information is carried by a link modification request message.

A communication apparatus, comprising:

• at least one processor;
• and
• a non-transitory computer-readable storage medium storing a program to be executed by the at least one processor, the program including instructions for:
• receiving a first message from a first terminal device, wherein the first terminal device and the communication apparatus perform relay communication via a first relay device, wherein the first message comprises an identifier of at least one candidate relay device, a relay reselection indication indicating to change a relay device, and an address of the at least one candidate relay device, and the address of the at least one candidate relay device is a layer 2 identifier, wherein a status of a signal between the at least one candidate relay device and the first terminal device satisfies a first preset condition;
• obtaining, based on the address of the at least one candidate relay device, a status of a signal between the at least one candidate relay device and a second terminal device;
• determining, based on the status of the signal between each of the at least one candidate relay device and the second terminal device, a second relay device from the at least one candidate relay device;
• and
• sending indication information to the first terminal device, wherein the indication information indicates to change a relay device between the communication apparatus and the first terminal device to the second relay device, the indication information comprises an identifier of the second relay device, the indication information is carried by a link modification request message.