A Novel Parameterized QoS based Uplink and Downlink Scheduler for Bandwidth/Data Management over IEEE 802.16d Network

Recent developments in Broadband Wireless Access (BWA), caused users to use multimedia, real–time and high bandwidth intensive applications that lead to a new era of research and development in wireless networks. IEEE 802.16 standard has come forward as BWA solution to fulfill the requirements of users. Even though IEEE 802.16 standard defines scheduling service flows and quality of service parameters, but scheduling of these flows to maintain QoS and fairness among flows is left open for researchers. In this paper we developed a scheduling architecture for IEEE 802.16 in both uplink and downlink directions. Our scheduling architecture includes QoS parameters like maximum sustained rate, maximum latency, tolerated jitter, minimum reserved bandwidth, request transmission policy, traffic priority, burst size, SDU size and queue information for various scheduling service flows. We use First in First out (FIFO), Earliest Deadline First (EDF) and Self Clocked Fair Queuing (SCFQ) to schedule different flows to achieve QoS and efficient bandwidth utilization.