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Congestion control algorithm in large-delay uncertain networks

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Abstract

Based on Smith-fuzzy controller, a new active queue management (AQM) algorithm adaptable to the large-delay uncertain networks is presented. It can compensate the negative impact on the queue stability caused by the large delay, and it also maintains strong robustness under the condition of dynamic network fluid. Its stability is proven through Lyapunov method. Simulation results demonstrated that this method enables the queue length to converge at a preset value quickly and keeps the queue oscillation small, the simulation results also show that the scheme is very robust to disturbance under various network conditions and large delay and, in particular, the algorithm proposed outperforms the conventional PI control and fuzzy control when the network parameters and network delay change.

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This work was supported by the National Natural Science Foundation of China (No. 20020145007).

Fengjie YIN received her B.S. degree in Communication Engineering Department of Changchun Institute of Posts and Telecommunications in 1988, M.S. degree in Electrical Engineering Department of Harbin Institute of Technology in 1991, and Ph.D. Automatic Control Department of Northeastern University in 2006. She currently works at Liaoning University as an associate professor. Her research interests include network congestion control, network performance analysis etc.

Yuanwei JING received his B.S. degree from Liaoning University in Mathematics Department in 1981. He also received M.S. degree and Ph.D. in Automatic Control Department of Northeastern University in 1984 and 1988 respectively. As a Post-doctor fellow, he worked in Faculty of Electrical Engineer of Saint Cyril and Saint Methodius University in 1996. From 1998 to 1999, he was a senior visiting scholar in Faculty of Computer Science Telecommunication of Missouri-Kansas City University. He currently works at Northeastern University as a professor and supervisor of Ph.D. candidates. His research interests include complex systems, telecommunication control, etc.

Yuanjiu GONG received his B.S. degree in Physics Department of Beijing University in 1986, he currently works at Liaoning University as a professor. His research interests include communication engineering and electronic engineering.

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Yin, F., Jing, Y. & Gong, Y. Congestion control algorithm in large-delay uncertain networks. J. Control Theory Appl. 5, 67–70 (2007). https://doi.org/10.1007/s11768-005-5002-2

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  • DOI: https://doi.org/10.1007/s11768-005-5002-2

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