18 January 2011, 1 pm
The WiMAX standard allows the employment of independent schedulers for the five defined QoS classes. However, the type of scheduling is not defined in the standard to give a freedom to manufacturers to employ their own scheduling policies. We have proposed a greedy-based scheduler to serve a real-time Polling service (rtPS) class. It is known that a Greedy scheduler can serve delay-sensitive applications because it qualitatively shows lower average delay, but it has a low fairness index both in terms of delay and throughput. In addition to that, its average delay in heavy load conditions is not within the required maximum latency. Thus, we propose a combined scheduling and packet dropping algorithm which is shown to bring the average delay below the required maximum latency and also significantly improves the delay fairness when compared to a Greedy scheduler.
Title: Less Aggressive Greedy-based Scheduler for Real time Video Transmission over WiMAX Networks: Performance and Tradeoffs
Room 1.11 of the Merchant Venturers Building.