A comparative simulation of congestion avoidance techniques in broadband ISDNs

A comparative simulation of two congestion avoidance techniques in broadband integrated services digital networks (B-ISDNs) is presented. These broadband telecommunication networks are being designed for handling, in their final form, a large variety of digital information, e.g. data, voice, video, facsimile, etc. Asynchronous transfer mode (ATM) has been recommended by the CCITT as one of the most promising means of providing efficient and fast packet switched communication among B-ISDN users. An efficient and simple yet effective technique for congestion avoidance in these broadband networks is presented, and its performance is compared with an existing technique. The performance is evaluated by simulating these two techniques for a network that supports three types of services. The bandwidth requirements (in terms of cells per call) of these services are assumed to be geometrically distributed. Simulation results are presented in terms of call blocking probabilities for different cases