Real-time cell arrival sequence estimation and simulation for IP-over-ATM networks

We have developed a new traffic measuring tool and applied it to the real-t ime simulation of a network. It monitors IP traffic on an ATM link and cont inuously transfers the length and timestamp of each IP packet to a post-pro cessing system. The post-processing system receives the data, estimates the cell's arrival epoch at the transmission queue of the ATM link, and simula tes the queueing behavior on-line if conditions differ from those of the ac tual system. The measuring tool and real-time simulation represent a new ap proach to traffic engineering. A new estimation problem, the arrival sequen ce estimation, is shown and some algorithms are proposed and evaluated. Als o, a new dimensioning algorithm called the queue decay parameter method, wh ich is expected to be robust and applicable to real-time control, is propos ed and evaluated.