Title :
An observer-based robust active Queue Management scheme
Author :
Chuan, Zhou ; Jun-wei, He ; Qing-wei, Chen
Author_Institution :
Sch. of Autom., Nanjing Univ. of Sci. & Tchnology, Nanjing, China
Abstract :
Considering the characteristics of time-varying network parameters and input saturation, TCP /AQM system is described as linear state space model with state and input delay. An observer-based robust H-infinity AQM scheme is presented in this paper, where the state-observer is used to obtain the TCP window size which is immeasurable in real TCP network, in order to avoid the error by approximation. Based on Lyapunov stability theory and LMI techniques, AQM controller is designed to guarantee the robust stability of closed-loop system. Finally simulation results verify the effectiveness of the presented algorithm via NS-2 simulator.
Keywords :
Lyapunov methods; control system synthesis; linear matrix inequalities; observers; queueing theory; robust control; telecommunication control; telecommunication network management; time-varying networks; time-varying systems; transport protocols; AQM controller design; LMI techniques; Lyapunov stability theory; NS-2 simulator; TCP window size; TCP-AQM system; closed-loop system; linear state space model; observer-based robust H-infinity AQM scheme; observer-based robust active queue management scheme; robust stability; state-observer; time-varying network parameters; Algorithm design and analysis; Electronic mail; H infinity control; Heuristic algorithms; IEEE transactions; Internet; Robustness; AQM; H-infinity control; LMI; Network congestion control; state observer;
Conference_Titel :
Control Conference (CCC), 2012 31st Chinese
Print_ISBN :
978-1-4673-2581-3
