Title :
H∞-performance analysis of robust controllers designed for AQM
Author :
Yan, Peng ; Ozbay, Hitay
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
It has been shown that the TCP connections through the congested routers with the active queue management (AQM) can be modeled as a nonlinear feedback system. In this paper, we design H∞ robust controllers for AQM based on the linearized TCP model with time delays. For the linear system model exhibiting LPV nature, we investigate the H∞-performance with respect to the uncertainty bound of RTT (round trip time). The robust controllers and the corresponding analysis of H∞-performance are validated by simulations in different scenarios.
Keywords :
H∞ control; computer network management; control system synthesis; delays; queueing theory; robust control; telecommunication congestion control; transport protocols; H∞-performance analysis; RTT; TCP connections; active queue management; congested routers; linear system; nonlinear feedback system; robust controllers design; round trip time; time delays; uncertainty bound; Delay effects; Finite impulse response filter; Laplace equations; Mathematical model; Network topology; Propagation delay; Robust control; Robust stability; Roentgenium; Uncertainty;
Conference_Titel :
American Control Conference, 2003. Proceedings of the 2003
Print_ISBN :
0-7803-7896-2
DOI :
10.1109/ACC.2003.1240493
