Radio resource allocation for heterogeneous services in relay enhanced OFDMA systems

We propose a priority based resource allocation algorithm for heterogeneous services in the relay enhanced OFDMA downlink systems. The aim is to maximize the system throughput while satisfying the quality of service (QoS) requirements of heterogeneous services, comprising real time (RT) and non real time (NRT) services. The base station (BS) allocates resources dynamically to the users in a prioritized manner. The priority parameter depends on the channel condition, QoS requirement and data buffer information. We propose a suboptimal algorithm to reduce the computational complexity. The simulation results are compared with the fixed as well as dynamic resource allocation algorithms proposed in different researches. Our proposed scheme reduces the outage probability of the system and increases the system throughput. © 2010 ACADEMY PUBLISHER.