A Joint Channel and Queue-Aware Scheduling for IEEE 802.16 Wireless Metropolitan Area Networks

The authors propose a joint channel and queue-aware scheduling scheme for the downlink of the IEEE 802.16 wireless metropolitan area networks (WMANs). The base station scheduler determines the order of transmissions based on the channel quality and the stability status of each base station queue. Stability status is defined as the ratio of the average departure rate to the average arrival rate for each queue. The integration of opportunistic and stable service deliveries in the scheduling scheme increases the throughput and reduces the dropping probability and service discontinuity for non-real-time applications. Simulation results are given to demonstrate the performance of the proposed scheduling scheme.