An H/spl infin/ approach to congestion controller design for wireless access networks

In this paper, we aim at developing an H_infin approach, from control-theoretic viewpoint, to the design of an active queue management (AQM) based congestion controller for wireless networks supporting Internet protocol. We study networks in which the backbone is a traditional wired network supporting Internet TCP, while end user access is via wireless way. First, a dynamic model for the congestion control problem of wireless networks is built up, which enables the application of modern control theory on time-delay systems to this problem. Second, an H_infin design approach for general time-delay systems is presented. Finally, the proposed approach is applied to the congestion controller design of wireless networks, yielding an effective and systematic way for the design problem. Simulation results are provided to illustrate the design procedure and the effectiveness of the proposed method