Comparative Study of Scheduling Algorithms for WiMAX

ABSTRACT: Broadband wireless access industry has seen very significant growth in present time due to its unique advantages compared to wired technology like rapid deployment and easy configuration, high scalability, lower maintenance cost, lower investment and also end-user preference. But as this industry has grown, different alternatives also emerged to capture available market. In this scenario, it is very important to provide outstanding service to end-user by ensuring that diversifying requirements of different applications are satisfied in the best way possible. Due to this Quality of Service (QoS) has become very important issue in present era to differentiate oneself from other competing technology. WiMax (IEEE 802.16) is one such standard specifies general QoS architecture with various parts of this architecture is left undefined. Most important part of this architecture is Scheduling Algorithm and this part is not defined and left open for vendors to implement as per their needs. This paper first describes in section I brief introduction to QoS architecture specified by 802. 16. Section II describe various approaches to provide scheduling in WiMAX and Section III provides detailed study of three algorithms. Section IV provides comparative study of these algorithms, finally we conclude in section V