Flluid flow approximation of time-limited TCP/UDP/XCP streams.

This article presents the use of fluid flow approximation to model interactions between a set of TCP, UDP and XCP flows in the enveronment of IP routers using AQM (Active Queue Management) algorithms to control traffic congestion. In contrast to other works, independent UDP and TCP streams are considered and the model allows to start and end data transmissions in TCP, UDP and XCP strams at any time moment. It incorporates several Active Queue Management mechanisms: RED, NLRED, CHOKe.