Software implementations of QoS scheduling algorithms for high speed networks /

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2015
Pehlivanlı, Aydın
The end to end Quality of Service (QoS) support for the dominating multimedia traffic in the contemporary computer networks is achieved by implementing schedulers in the routers and deploying traffic shapers. To this end, realistic modeling and simulation of these components is essential for network performance evaluation. The first contribution of this thesis is the design and implementation of a C++ simulator QueST (Quality of Service simulaTor) for this task. QueST is a modular cycle accurate simulator with a detailed modeling of the traffic flows, shapers and schedulers. The traffic generators and the schedulers of QueST are verified by comparison to the respective analytical models. The QoS schedulers are data plane components in routers which have to operate at 10s of Gbps rates. Hence, the increasing scheduling complexity with the number of flows is an important problem. This problem can be alleviated by reducing the number of flows by traffic aggregation. The second contribution of this thesis is the evaluation of previously developed Window Based Fair Aggregator (WBFA) in QueST under a large number of case studies to investigate its features and benefits as well as optimal parameter selection.

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Citation Formats
A. Pehlivanlı, “Software implementations of QoS scheduling algorithms for high speed networks /,” M.S. - Master of Science, Middle East Technical University, 2015.