Priority Control Scheduling for Downlink and Uplink in WiMAX Network

In a WIMAX scheduler, when scheduling scheme needs to be designed for downlink and uplink, the issues of packet delay is paramount. This is even more when considering real time sensitive packets. In this paper, a Priority Control Scheme (PCS) is proposed to provide better QoS for real time delay sensitive packets in uplink and downlink channel. This is done by classifying the service flow priority of the packets into two types, which are time-delay sensitive and non-time delay sensitive. The performance from the proposed PCS is compared with the WIMAX classification service flow priority. The simulation results using OPNET show that the proposed scheme outperforms the existing scheme by having less delay.