YUE Cheng-jun; YIN Feng-jie
Taking account of unfairness of the bandwidth, which due to the unfriendly TCP don’t obey to the TCP congestion control protocol, this paper presents a congestion control algorithm ensuring TCP-friendly flow fairness. A new robust discreted sliding mode controller is designed based on the max bound of the non-TCP friendly flow. It analyzes the characteristic of the non-TCP friendly flow, and the max translation value of an TCP-unfairness is estimated. It proposes controller regards the influence of unknown disturbances of non-TCP friendly flow and uncertain parameters as an equivalent disturbance, and estimates the value of the disturbance on line by the mechanism of router time delay, employing the value in designing the control law in order to cancel the slowly varying uncertainties. Simulation results show that the algorithm is highly robust against the disturbance under various networks conditions and outperforms significantly.