A reliability analysis of failsoft FDDI networks

Abstract

The reliability of three fiber distributed data interface (FDDI) network topologies is examined. The three interconnection topologies considered are a tree, a double ring, and a ring of trees. The reliability measure is terminal-pair reliability in which the probability P(h(s,t)) that two arbitrarily positioned terminal stations (s and t) can communicate with each other is calculated. For the three FDDI network topologies considered, closed-form expressions are obtained for worst-case reliability as a function of the stations' positions. The expressions are used to optimize the number of ports in and the topological interconnections of the wiring concentrators in order to achieve highest reliability for a given number of stations.<>