A New Robust Adaptive Controller under Dynamic Network Environment

To suppress the disturbance of unresponsive flows including HTTP and UDP connections, a novel AQM scheme, called RA-AQM, is proposed in this paper. RA-AQM is an adaptive controller for congestion control, and it can adjust its control parameters according to the network state. Simulation results show that the RA-AQM is robust and stable against traffic load fluctuations and unresponsive flow disturbances. RA-AQM can quickly regulate queue length to the target value, give fast response and keep the oscillation small.