End to end congestion control and active queue management

As an effective method for congestion control, active queue management plays an important role in improving the QoS of the Internet. In this paper, a newly developed TCP protocol Vegas and AQM are analyzed by dual theory. The mathematic model gives a better understanding about networks control, pointing out Vegas adapts to high speed network well and REM algorithm helps to achieve both high utility and low queue length. Simulation shows that REM is efferent, stable and outperforms current algorithms.