Patent ID: 8880971

Claim:
A hybrid automatic repeat request (H-ARQ) supporting method by a relay node when a transmitting node transmits information data to a receiver in cooperation with at least one relay node, the method comprising: receiving a first data packet corresponding to the information data from the transmitting node; restoring the information data from the first data packet, and determining an erroneous state of the restored information data; receiving response information from the receiver when the restored information data have no error; and transmitting a second data packet corresponding to the information data to the receiver when the response information includes a repeat request caused by transmission failure and repeat transmitter selecting information included in the response information indicates that the relay node is one of a plurality of repeat transmitters in a repeat transmitter group of the repeat transmitter selecting information, wherein the receiver transmits the response information to the relay node in response to the first data packet received directly from the transmitting node, wherein a repeat method is determined from the repeat transmitter selecting information and wherein the relay node transmits the second data packet corresponding to the information data to the receiver using the repeat method.