Optimal active queue management for internet with reduced-order state-observer
Cunwu Han, Qi Diao, Shurui Chang, Song Bi, Lei Liu, Zhong‐Hua Pang · 2016
Network congestion is an important problem for Internet, and active queue management (AQM) is an effective congestion control technique. However, because the system states in real networks cannot be obtained directly, the traditional congestion control methods based on the AQM cannot obtain the state-feedback control law. Based on the modeling of the system, this paper presents an optimal congestion control method with reduced-order state-observer for Internet based on the AQM. The reduced-order state-observer is used to obtain the system state which cannot be obtained directly. The optimal control law to optimize the performance index is obtained by solving the Riccati equations, and the optimal congestion control for Internet is achieved. Simulation results show that the proposed algorithm has good tracking performance.