Classical control theory for congestion avoidance in high-speed Internet

The explosive growth of the Internet with the ever-increasing demand for network bandwidth makes the issue of congestion control critical. In this paper, we use classical control theory to model the congestion control algorithm of the Internet´s Transmission Control Protocol (TCP) and the Smith principle to design a new algorithm for congestion control for the high-speed Internet. The analysis provides a theoretical insight into the congestion control mechanisms of TCP, along with a method to modify and improve this mechanism in a way that is backward-compatible, The proposed control algorithm generalizes today´s TCP congestion control algorithm using a generalized advertised window which is obtained by means of round-trip time measurements