A robust congestion control strategy for delay dependent differentiated-services networks

For time-delayed dependent scalable Differentiated Services (DiffServ) networks the use of robust control techniques are essential for addressing the congestion control problem. Sliding mode-based variable structure control (SM-VSC) technique robustness capabilities are utilized in this paper to design on the basis of an inaccurate/uncertain model, a new congestion control algorithm. The utilized fluid flow model (FFM) is of low order and simpler than a detailed Markovian queuing probabilistic models. The proposed time-delayed dependent congestion control dynamics is studied analytically to guarantee stability of the closed-loop system. To evaluate robustness and to demonstrate the capabilities of our proposed algorithm, simulation results are provided for different operating conditions and time-delay values.