Abstract:

An active queue management (AQM) algorithm is presented based on discrete-time global sliding mode control to solve the problems of dynamic transmission control protocol (TCP) network congestion, which can remove the reaching phase from sliding mode control so as to guarantee the system robustness during the whole control process. An improved sliding mode reaching law is designed, which can weaken the chattering, and make the complex network systems to have well performance. Simulation results demonstrate that the proposed controllers have good stability and robustness with respect to the uncertainties of the number of active TCP sessions, link capacity and the round-trip time.