Network resource allocation method for communicating control systems

In order to realize distributed control systems, it is required to tie up plural distributed subsystems through a network, and the fusion of control engineering and realtime communication technology is also required. In this article, a new network resource allocation method is proposed. This is based on a traffic control queuing mechanism called ALTQ. To fill the delay time constraints for each flow, an online measurement mechanism of each packet transmission time in a router is introduced into a conventional ALTQ to limit the number of flows. This article shows the design and the implementation of the measurement mechanism. Also some experimental results shows the efficiency of the proposed method.