Patent ID: 8040830

Claim:
A communication method of a superordinate station in a wireless communication system using a multi-hop relay scheme, the method comprising: upon detecting an initial access of a Relay Station (RS), determining an offset value between a frame number used in the superordinate station and a frame number to be used in the relay station; determining a maximum waiting time by considering processing delay times of all relay stations including the connected relay station; determining a waiting time of the relay station using the maximum waiting time; generating a message which includes RS frame offset information corresponding to the offset value and information on the waiting time; transmitting the generated message to the relay station; upon generating a broadcast message to be transmitted at a same frame number by both the superordinate station and the relay station, determining a transmission time point, at which the broadcast message is transmitted to the relay station, by using a transmission frame number of the broadcast message and the maximum waiting time; transmitting the broadcast message to the relay stations at the determined transmission time point; and transmitting the broadcast message to a Mobile Station (MS) at a frame corresponding to the transmission frame number.