Nonlinear output feedback control of TCP/AQM networks

Research output: Contribution to journalConference articlepeer-review


An output-feedback Active Queue Management (AQM) scheme is presented for asymptotically stabilizing a class of TCP networks at a desired operating point. In order to design an AQM controller with only an output (queue size) measurement, a novel TCP window size observer is first proposed. Then, the control law is developed by applying an observer-based backstepping design technique. The amplitude limits on the control input is addressed, namely, packet dropping or marking ratio must fall between 0 and 1. An estimation of the domain of attractiveness is given with a Lyapunov level set [3].

Original languageEnglish (US)
Article number1465026
Pages (from-to)2072-2075
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - 2005
EventIEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 - Kobe, Japan
Duration: May 23 2005May 26 2005


  • AQM
  • Congestion control
  • Output feedback
  • Persistent excitation
  • TCP

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


Dive into the research topics of 'Nonlinear output feedback control of TCP/AQM networks'. Together they form a unique fingerprint.

Cite this