A Fair-Oriented Two-Level Scheduling Scheme for Downlink Traffic in WiMAX Network

The IEEE 802.16 standard is proposed to provide a wide-range broadband wireless service, but it leaves the implementation of the wireless resource scheduler as an open issue. We study the scheduling algorithm and propose a fairoriented two-level scheduling scheme for downlink traffic in a WiMAX network. A central controller (Base Station) has a number of users, and different mobile subscriber stations have different channel conditions. Even the same mobile subscriber station has different service requirements in the WiMAX network. Our design improves throughput and alleviates the delay and also ensures fairness in the network. Our results show our scheduling algorithm can increase the network throughput, maintain the relative fairness, and lower delay compared with the round robin algorithm.