Design and Analysis of an Efficient Queue Scheduling Scheme for Heterogeneous Traffics in BWA Networks

The most important aspect of Broadband Wireless Access (BWA) networks is to provide heterogeneous traffic flows with a guarantee of Quality of Service (QoS). To this end, we have designed an efficient adaptive Weighted Hybrid Queue Scheduling Scheme (WHQSS) to support differential QoS requirements for traffic classes, which are heterogeneous in BWA networks. At first, the performance of WHQSS is analyzed in comparison with two important Queue Scheduling Schemes (QSSs), namely Priority Queue Scheduling Scheme (PQSS) and Hybrid Queue Scheduling Scheme (HQSS) those are designed with some major existing scheduling algorithms. A single analytical platform has been created using 3D Continuous Time Markov Chain (CTMC) model to investigate the performance in terms of several parameters like mean number of packets waiting in the queue, throughput, mean queuing delay, packet loss probability, and fairness index of the said QSSs. The comparative performance results clearly reveal the superiority of WHQSS providing optimal QoS guarantee and highest fairness than other QSSs for heterogeneous traffic classes.