Implementing models of the FDDI-II cycle synchronization technique

Abstract

This paper considers the cycle synchronization technique of FDDI-II and evaluates it on some possible implementation models. In an FDDI ring system, each station determines the bit clock of data transmitted therefrom. In an FDDI-II system also supporting a circuit-switched service, 125 μs cycles are generated and circulated on a ring from a master station, and each slave station synchronizes to them. The smoothing function of the physical layer in each station adjusts the length of the preamble to transmit data without loss. We explored five models of stations and simulated cycle circulation operation on a ring to verify the smoothing function's effectiveness and the propriety of the FDDI-II cycle synchronization technique.