Patent ID: 8522088

Claim:
A method for transmitting a data block in a wireless communication system, comprising: transmitting the data block to a receiver; determining whether the transmission of the data block fails; generating a retransmission block for the retransmission of the data block if it is determined that the transmission fails; increasing a value of a short retry counter (SRC) if it is determined that the transmission of the data block failed and a time to transmit the data block is less than a first threshold value; increasing a value of a long retry counter (LRC) if it is determined that the transmission of the data block failed and a time to transmit the data block is more than the first threshold value; determining whether channel access is performed according to a transmit time of the retransmission block; performing the channel access if it is determined that the channel access is performed; and transmitting the retransmission block to the receiver after the channel access is performed.