Novel AQM algorithm employing observer-based SMC for efficient internet congestion prevention
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CitationWang, H., Jing, Y., Stojanovski, G. S., Stankovski, M. J. & Dimirovski, G. M. (2010). Novel AQM algorithm employing observer-based SMC for efficient internet congestion prevention. In 2010 IEEE International Conference on Systems Man and Cybernetics (SMC) (pp. 2256-2262). Piscataway, NJ: IEEE. http://dx.doi.org/10.1109/ICSMC.2010.5641978
An active queue management (AQM) scheme employing state observer and sliding mode control (SMO-SMC) is designed in this paper in order to overcome congestion problem in TCP communication networks. First, sliding mode observer is designed for input delay network system; a sufficient condition is given for the existence of such an observer in terms of linear matrix inequality. Then, on the grounds of estimated system state vector, a controller is synthesized by using the sliding-mode control theory combined with the reaching law technique. The reachability condition in such a SMO-SMC AQM scheme is also discussed. The stability and robustness of the proposed control scheme are then validated for different network scenarios using Matlab/Simulink. Simulation results for the single-bottleneck benchmark network confirmed the proposed scheme achieves high-quality performance as well as outperforms the previous observer-based sliding-mode and traditional controllers.