Performance analysis of interconnected metropolitan area circuit-switched telecommunications networks

A circuit-switched telecommunications network is considered that consists of two metropolitan area networks (MANs) interconnectd by a multiaccess communications channel, such as a satellite or multiaccess multichannel terrestrial trunk. The blocking probability performance of this network is computed, using a finite-source-traffic model, by setting up a Markov chain model and applying results based on the reversibility of this chain to compute the underlying state probabilities. Local and long-distance blocking probabilities are calculated. each in terms of its two components: circuit-blocking and destination-busy probabilities. Both dedicated and shared circuit allocation policies are used in allocating the circuits of a MAN between its local and long-distance calls. Explicit performance equations are presented. Illustrative results and performance curves are given, indicating the various underlying system performance characteristics and tradeoffs