An Adaptive Weight Calculation based Bandwidth Allocation Scheme for IEEE 802.16 Networks

Abstract

WiMAX standard also known as IEEE 802.16 is a wireless MAN standard driven by WiMAX Forum. WiMAX forum defines specification for QoS provisioning for manufacturing of WiMAX equipment by different vendors but the amount of bandwidth allocated to specific service in WIMAX is still an open issue. A number of algorithms have been presented to satisfy the diverse QoS requirements for traffic in WiMAX networks. The focus of all these algorithms is towards real time traffic. Non real time traffic like nrtPS and BE is quite often neglected. This paper is an attempt towards fair allocation of resources to non real time traffic simultaneously taking care of real time traffic also. The approach uses uncertainty principles of fuzzy logic to calculate new weights for different flows and makes allocation based on these new weights. Simulation results show that the proposed scheme was able to meet required performance levels for both kinds of traffic.