Evaluation and comparaison of scheduling algorithms in Wimax networks

In this paper, we propose a new scheduling algorithm for IEEE802.16 Broadband wireless Metropolitan Area Networks in TDD mode. Based on some known algorithms such as Modified Deficit Round Robin (MDRR), Proportional Fairness (PF) and Adaptive Proportional Fairness (APF), we have studied the scheduling problem and proposed scheduling algorithm, called (Enhanced-APF) for focuses on an efficient mechanism to serve high priority traffic in order to perform and achieve high resource utilization in the Wimax Base Station. We give a detailed simulation study for the proposed scheduling algorithm and its performance has been compared. Based on OPNET modeler Simulation, results show that the proposed algorithm can increase the network throughput, maintain relative fairness, and lower delay of dealing with different requirements from users under congestion conditions.