AN ANALYSIS OF A DISCRETE-TIME QUEUE FOR BROAD-BAND ISDN WITH PRIORITIES AMONG TRAFFIC CLASSES

In Broadband ISDN, different classes of traffic expect to receive diff erent quality of service. One way of providing service is to implement a priority structure among traffic classes. We analyze a single serve r queue in which video and voice traffic receive priority over data tr affic. Corresponding to the fixed cell size of ATM, we assume that ser vice times are deterministic. We further assume that the high priority traffic is correlated and the arrivals are governed by a Markov chain . With these assumptions, we characterize the queue length distributio ns and the waiting time distributions for this problem. We show by num erical examples that the delay distribution depends highly on the corr elations and that a priority service discipline is capable of providin g very good service for real time traffic.