Abstract
Orthogonal Frequency Division Multiple Access (OFDMA) is an attractive modulation technique adopted in new generation wireless networks, such as WiMAX, to provide high-speed transmission. In an OFDMA frame, burst is the radio resource allocated by Base Stations (BSs) for Subscriber Stations (SSs) to receive or transmit data. Due to scarcity of radio resource, how to allocate bursts to SSs efficiently becomes an important issue. In this paper, we especially focus on the downlink burst allocation problem because users spend most of their time to download data from BSs. A QoS-based resource allocation and scheduling scheme is proposed aiming to deal with the burst allocation problem in cooperative OFDMA wireless networks. Consideration of QoS guarantee and two-hop transmission can also improve the efficiency of the proposed scheme. Simulation results show that our proposed scheme can minimize the transmission time and thus increase thenetwork throughput.