APPARATUS AND METHOD FOR RETRANSMITTING REQUEST IN WIRELESS RELAY COMMUNICATION SYSTEM

摘要

Data retransmission apparatus and method in a wireless relay communicatio n system are provided. It is checked whether an Acknowledgement (ACK) messag e or a Negative ACK (NACK) message for data is received from a Relay Station (RS), which receives the data from a Mobile Station (MS). Scheduling inform ation for transmitting the data is transmitted to the RS, when the ACK messa ge is received from the RS. Errors are checked for in of the data, when the data is received from the RS. The RS is requested to retransmit the data, wh en the data has an error. Accordingly, since the RS retransmits only the err or-free data to the BS, the BS can enhance the data reliability.