NOFC-VRTT:Nonlinear AQM algorithm based on variable RTT
Wang Zhi-quan · Kongzhi yu juece · 2010
An active queue management algorithm is presented for network congestion,which is based on variable round trip time(RTT).A novel TCP window size observer is first proposed,which can prove that the observer state converges to the real sate asymptotically,when packet dropping or marking ratio falls between 0 and 1.A nonlinear output feedback controller is designed based on backstepping technique,and the value range of the parameters are also discussed.Ns simulation results show that the proposed NOFC-VRTT presents high robust stabilization,high link utilization and low packet loss ratio,which even provides high fairness for the TCP sources.