Abstract

Extensive numbers of the IEEE 802.16e Mobile WiMAX scheduling proposals focus on simulation for obtaining performance measures of the proposed scheduling algorithm. There is also handful of article that focused on the mathematical modeling. However, the model is derived assuming the traffic from different quality of service (QoS) classes is separated, which allow for independent analysis. In this paper, we propose an uplink (UL) scheduling algorithm that considers the adaptive modulation and coding scheme and QoS parameters of all five service classes. The resources are distributed in two stages. The first stage allocates the resources to different classes of service in accordance to the threshold based priority while the second stage allocates the resources within the same class with the exhaustive service strategy. A mathematical model that combine the different QoS classes of Mobile WiMAX is formulated and it is derived based on the weighted sum of the mean waiting time for the individual queues or known as pseudo-conservation law. 

Key words: Uplink scheduling, mobile WiMAX (IEEE 802.16e), threshold based cyclic polling (TbCP) algorithm, pseudo-conservation law, QoS.