Abstract
AbstractBandwidth allocation plays a crucial role in ensuring overall quality of service in WiMAX. WiMAX supports non-contention based bandwidth allocation mechanism, where the responsibility of bandwidth allocation lies with the base station. In this paper, a novel user- centric, Game Theory-based bandwidth allocation algorithm is proposed. The Users/Mobile Station shall be grouped in pairs and bandwidth allocation is performed alternately between the two users of a group. In any given frame only one user from a pair is allocated bandwidth. The bandwidth thus allocated shall satisfy the requirements of the user/mobile station for two consecutive frames. Since, in any given frame, only one user/MS is allocated the bandwidth, the proposed algorithm reduces the frame overhead, thereby saving precious bandwidth that can be utilized to improve throughput. Simulation results show a 50% decrease in the uplink frame overhead and about 8% improvement in the uplink throughput per user/mobile station.
Highlights
IEEE 802.16e [1,2,3] is a combination of layer-2 and layer-1 protocols that provide fixed and mobile broadband wireless solution
It can be observed that the average frame overhead for Game Theory based Bandwidth allocation Algorithm (GTBA) is about 40-50% less compared to Earliest Deadline First (EDF)
From the figure it is clear that the uplink overhead is about 50% less for GTBA compared to EDF
Summary
IEEE 802.16e [1,2,3] ( called WiMAX) is a combination of layer-2 and layer-1 protocols that provide fixed and mobile broadband wireless solution. WiMAX provides quality of service (QoS) by segregating user data into five different service class. The decision on the appropriate service class is made based on the quality of service requirements, like delay, jitter and throughput for the traffic. The first service class called Unsolicited Grant Services (UGS) is designed to support real time data streams that generate fixed size packets at periodic intervals. Voice over IP without silence suppression is an example for traffic that is categorized as UGS. The second service class called Real Time Polling Services (RTPS) supports real time data streams that generate variable sized packets on a periodic basis.
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