A Queue Based Scheduling Approach for WMAN with Adaptive Augmentation

IEEE 802.16 Wireless Broadband is a promising technology for providing last mile access. Quality of Service (QoS) is an important factor that has been addressed by the standard which defines four types of multimedia traffic classes. However resource allocation and scheduling between the traffic classes is vital in providing QoS which the standard has left undefined. In this paper we propose a Markov Chain analytical model for a queue based uplink scheduling algorithm proposed earlier. The algorithm is based on resource sharing between real time and non real time traffic depending on their queue size and latency requirements. We then compare the analytical and simulation results. We also propose an adaptive scheduling scheme based on the delay feed back for the real-time flows and compare its performance with fixed scheduling.