An efficient scheduling scheme for heterogeneous traffic in IEEE 802.16 wireless metropolitan area networks

An opportunistic stable queue (OSQ) scheduling scheme is proposed for scheduling heterogeneous traffic in the down-link of the IEEE 802.16 wireless metropolitan area networks (WMANs). The scheduler, located at the base station, uses the information of the channel and queue status of the users to schedule the traffic with different quality of service requirement and different arrival rate admitted to the queues in the base station. The scheduler deploys a differentiation technique, based on a notion of stability, to satisfy different service rate requirement of heterogeneous traffic types. It is demonstrated based on the numerical results that the proposed scheme has excellent performance in terms of throughput for non-real-time traffic and delay for real-time traffic.