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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2007, Vol. 8 Issue (1 ): 16-    DOI: 10.1631/jzus.2007.A0113
    
Using Lyapunov function to design optimal controller for AQM routers
ZHANG Peng, YE Cheng-qing, MA Xue-ying, CHEN Yan-hua, LI Xin
School of Computer Science and Technology, Zhejiang University, Hangzhou 310027, China
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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.

Key words： TCP flows      Active queue management (AQM)      Lyapunov function      Optimal controls     
Received: 10 February 2006     
CLC:  TP393  
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ZHANG Peng
YE Cheng-qing
MA Xue-ying
CHEN Yan-hua
LI Xin
Cite this article:

ZHANG Peng, YE Cheng-qing, MA Xue-ying, CHEN Yan-hua, LI Xin. Using Lyapunov function to design optimal controller for AQM routers. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(1 ): 16-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2007.A0113     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2007/V8/I1 /16

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[2] HU Jian-bo, SU Hong-ye, KE Ting, CHU Jian, CHEN Xin-hai. CONTINUOUS ROBUST TRACKING CONTROLLERS FOR A CLASS OF UNCERTAIN NONLINEAR DYNAMICAL SYSTEMS[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2001, 2(2): 137-141.