| The goal of the thesis is to evaluate and enhance the performance of the multiple access control protocol of the IEEE 802.16 standard.; First, using mathematical modeling, I analyze the contention delay of the reservation requests in the reservation multiple access protocol of the standard in light of the available contention slots in a frame. I obtain insightful observations on the impact of the various system design parameters on the contention delay among which is the size of the reservation period.; Furthermore, I develop an analytical model to compute the contention delay, data transmission delay and throughput resulting from different reservation period allocations under dynamic traffic conditions. To this end, I instigate different arguments to understand the protocol performance and potentials. I illustrate the performance compromises and remedies with respect to the reservation period allocation.; Based on the analytical model and performance evaluation results, I present a framework of a dynamic reservation period controller to enhance the performance of the protocol. Furthermore, I propose a Markovian optimization model that achieves opportunistic performance improvement, on a per frame basis, over the best case static reservation period. Through simulation, I study the merits of the proposed optimized controller with respect to the framework. (Abstract shortened by UMI.)... |
