Real-time simulation with traffic monitoring tool

We have developed new traffic measuring equipment and applied it to the real-time simulation of a network. The measuring equipment monitors IP traffic on an ATM link and continuously transfers the packet length and the timestamp for each IP packet to a post-processing system. The post-processing system receives the data, estimates the arrival epoch to the transmission queue of the ATM link, and simulates the queueing behavior on-line for conditions different from those of the actual system. The measuring equipment and the real-time simulation are a new approach for traffic engineering. A new estimation problem, the arrival sequence estimation, is shown and a simple algorithm is evaluated. Also, a new dimensioning algorithm called the queue decay parameter method, which is expected to be robust and applicable to real-time control, is proposed and evaluated