Design on internal model controller for flow control in real-time multimedia communication
Lifeng Wei · Journal of China Institute of Communications · 2004
The application of VOD has been expanded rapidly with the popularization of broadband integrated services digital network. But the playback quality of VOD is not guaranteed because of the jitter of propagation delay. It is difficult for conventional Smith predicted control to overcome it. Due to the various delays in the network transmission, the buffer occupancy level and traffic model can be thought of integral time-varying delay model. On the basis of the control theory scheme of rate-based flow control, a new internal model feedback control is designed to overcome the adverse effect caused by propagation delay and jitter and keep buffer occupancy running to a given level. The playback quality of VOD is greatly improved.