Patent ID: 8397118

Claim:
An automatic repeat request (ARQ) method for use in a communication system, the method comprising: constructing a data block set including a plurality of data blocks using data received from an upper layer; transmitting the plurality of data blocks contained in the data block set to a reception end; and if a predetermined time elapses without receiving any acknowledgement (ACK) signal after transmitting a last data block among the plurality of data blocks, transmitting at least one data block reconstructed from the data received from the upper layer to the reception end until an acknowledgment (ACK) signal is received from the reception end, wherein a number of the transmitted at least one data block is equal to a number of received non-acknowledgment (NACK) signals, wherein the acknowledgment (ACK) signal is received from the reception end in response to the data block set when all of the plurality of data blocks of the data block set have been successfully received by the reception end, and wherein each of the NACK signals is received from the reception end in response to each data block of the plurality of data blocks when each data block has not been successfully received by the reception end.