关键词: 互联网拥塞控制, 滑模控制, T-S模糊模型, 主动队列管理

Abstract: As for the problem of congestion control in Internet, based on sliding mode control theory and Takagi-Sugeno（T-S） fuzzy model, a fuzzy sliding mode congestion control scheme is put forward. Considering uncertainty and time-varying delay factors in Internet, a network model is obtained by T-S fuzzy model for network system. An asymptotically stable sliding surface is designed by Linear Matrix Inequality（LMI）. It can effectively compensate for the effect of uncertainty and time-varying delay factors. The controller is designed by the way of reaching law, which can effectively constrain oscillation of the queue length in router. Simulation contrasts in many scenarios demonstrate that the proposed control scheme possesses better stability and robustness.

Key words: Internet congestion control, sliding mode control, T-S fuzzy model, active queue management