A Joint Uplink/Downlink Resource Allocation Scheme in Wireless OFDMA Networks

With the increasing demand for interactive services, it is important to investigate joint uplink/downlink resource allocation scheme in wireless networks, because the performance of the interactive service is determined by uplink and downlink jointly. In this paper, we propose a joint uplink/downlink resource allocation (RA) scheme in wireless orthogonal frequency division multiple access (OFDMA) networks with interactive service. The proposed RA scheme consists of a data interaction mechanism and a joint uplink/downlink RA algorithm. In the data interaction mechanism for interactive service, the base station encodes the received data from the interactive users over individual uplink channels using network coding technique, and multicasts the processed information over the same downlink channels. In the proposed RA algorithm, the uplink and downlink resources are allocated jointly for the interactive service. Simulation results show that the proposed joint uplink/downlink RA scheme allocates the resources efficiently in wireless OFDMA networks.