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Lyapunov-based Fuzzy Queue Scheduling for Internet Routers

Hyun Cheol Cho, M. Sami Fadali, Jin Woo Lee, Young Jin Lee, and Kwon Soon Lee*
International Journal of Control, Automation, and Systems, vol. 5, no. 3, pp.317-323, 2007

Abstract : Quality of Service (QoS) in the Internet depends on queuing and sophisticated scheduling in routers. In this paper, we address the issue of managing traffic flows with different priorities. In our reference model, incoming packets are first classified based on their priority, placed into different queues with different capacities, and then multiplexed onto one router link. The fuzzy nature of the information on Internet traffic makes this problem particularly suited to fuzzy methodologies. We propose a new solution that employs a fuzzy inference system to dynamically and efficiently schedule these priority queues. The fuzzy rules are derived to minimize the selected Lyapunov function. Simulation experiments show that the proposed fuzzy scheduling algorithm outperforms the popular Weighted Round Robin (WRR) queue scheduling mechanism.

Keyword : Fuzzy inference, internet routers, Lyapunov stability, queue scheduling.

 
 
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