Discrete-time flow control for connection-oriented communication network via reduced model
P. Baburaj, Bijnan Bandyopadhyay · 2013
In this paper, a suboptimal flow controller design for connection-oriented communication network via reduced model is proposed. Network is modeled as an nthorder discrete system whose available bandwidth variations at the bottlenecked link act as an exogenous unmatched disturbance. The proposed scheme is characterized by a simple first order design which is applied to nthorder systems through aggregation. Effect of bandwidth variation at the congested node which is modeled as a disturbance, is well accounted in controller design with widely adopted delay-based disturbance estimation. Performance of the proposed scheme is validated through Matlab and ns simulations. Simulation results shows that all the proposed reduced order control scheme tracks the desired queue length effectively under the adverse influence of unmatched disturbances.