On the performance limitation of active queue management (AQM)

Traffic properties relevant to active queue management (AQM) and the resulting pole/zero and Bode limitations are examined. ARX models of TCP are derived from data collected in a fixed "dumbbell" simulation environment. The pole dynamics at short time scales can be traced to the RTT, which serves as a confirmation of the relevance of the models. It is shown that the weighted sensitivity function is a reasonable metric for AQM performance. However, H/sup /spl infin// design shows that the sensitivity can only be slightly reduced. The conclusion of this work is that the goal of smoothing TCP's oscillations (a principle design goal of AQM) is likely not met in general.

[1]  Bing-Fei Wu,et al.  A simplified approach to Bode's theorem for continuous-time and discrete-time systems , 1992 .

[2]  Stephan Bohacek,et al.  TCP throughput and timeout - steady state and time-varying dynamics , 2004, IEEE Global Telecommunications Conference, 2004. GLOBECOM '04..

[3]  Glenn Vinnicombe,et al.  On the stability of end-to-end congestion control for the internet , 2001 .

[4]  Lennart Ljung,et al.  System Identification: Theory for the User , 1987 .

[5]  E. Jonckheere.  Principal component analysis of flexible systems--Open-loop case , 1984 .

[6]  R. Srikant,et al.  Analysis and design of an adaptive virtual queue (AVQ) algorithm for active queue management , 2001, SIGCOMM '01.

[7]  R. Srikant,et al.  An adaptive virtual queue (AVQ) algorithm for active queue management , 2004, IEEE/ACM Transactions on Networking.

[8]  Steven H. Low,et al.  Random Early Marking , 2000, QofIS.

[9]  Fernando Paganini,et al.  Internet congestion control , 2002 .

[10]  Gene F. Franklin,et al.  An error bound for a discrete reduced order model of a linear multivariable system , 1987 .

[11]  Edmond A. Jonckheere,et al.  On the predictability of data network traffic , 2003, Proceedings of the 2003 American Control Conference, 2003..

[12]  Eyad H. Abed,et al.  Nonlinear instabilities in TCP-RED , 2002, IEEE/ACM Transactions on Networking.

[13]  J. Rissanen,et al.  Modeling By Shortest Data Description* , 1978, Autom..

[14]  QUTdN QeO,et al.  Random early detection gateways for congestion avoidance , 1993, TNET.