Sliding Mode Congestion Control in Differentiated Service Communication Networks

The rapid growth of the Internet and increased demand to use the Internet for voice and video applications necessitate the design and utilization of new Internet architectures with effective congestion control algorithms. As a result, the Differentiated Service (Diff-Serv) architectures were proposed to deliver Quality of Service (QoS) in TCP/IP networks. Network congestion control remains a critical and high priority issue, even for the present Internet architecture. The aim of this paper is to design a robust active queue management system to secure high utilization, bounded delay and loss, while the network complies with the demands each traffic class sets. To this end, variable structure control theory is used and a sliding mode congestion controller is designed. Simulation results of the proposed control action demonstrate the effectiveness of the controller in providing robust queue management system.

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