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Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.1 P.113~118

http://doi.org/10.1631/jzus.2007.A0113


Using Lyapunov function to design optimal controller for AQM routers


Author(s):  ZHANG Peng, YE Cheng-qing, MA Xue-ying, CHEN Yan-hua, LI Xin

Affiliation(s):  School of Computer Science and Technology, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   zhang_peng_zju@yahoo.com.cn

Key Words:  TCP flows, Active queue management (AQM), Lyapunov function, Optimal controls


ZHANG Peng, YE Cheng-qing, MA Xue-ying, CHEN Yan-hua, LI Xin. Using Lyapunov function to design optimal controller for AQM routers[J]. Journal of Zhejiang University Science A, 2007, 8(1): 113~118.

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DOI - 10.1631/jzus.2007.A0113


Abstract: 
It was shown that active queue management schemes implemented in the routers of communication networks supporting transmission control protocol (TCP) flows can be modelled as a feedback control system. In this paper based on lyapunov function we developed an optimal controller to improve active queue management (AQM) router’s stability and response time, which are often in conflict with each other in system performance. Ns-2 simulations showed that optimal controller outperforms PI controller significantly.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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