A robust controller for the TCP congestion window

In this paper a robust active queue management (AQM) for TCP flows is designed. We synthesized a robust controller by using the H_infin control based on weight method. This was done by defining two weights W₁(s) and W₂(s); the first taking account of the desired performances and the second insuring the robustness of the controller to the model uncertainties. We also compared our controller with other ones proposed in the literature.