Performance analysis of the fiber distributed data interface (FDDI) network

The Fiber Distributed Data Interface (FDDI) is a 100 Mbps local area network using optical fiber as the transmission medium in a ring configuration. Media Access Control (MAC) of the FDDI network is based on a Timed-Token Protocol (TTP) which supports a synchronous traffic class with guaranteed bandwidth and response time and an asynchronous traffic class with dynamic bandwidth sharing of the system.; In this dissertation, we present performance analyses of the FDDI token ring by using three analytic methods.; We employ a discrete-time Markov chain approach to conduct exact analysis of a nonsymmetric FDDI network supporting stations with single packet buffers. A simplified analysis is provided for the symmetric network containing a large number of stations. We analyze the queueing performance of such networks in terms of the derived token rotation time distribution, normalized throughput and mean packet waiting time at each station.; For a heterogeneous FDDI network serving buffer-limited asynchronous stations, we present a performance analysis method which uses analysis of an M/G/1/N vacation model for each station. We develop a set of iterative procedures to efficiently evaluate the network performance by examining at each station the calculated normalized throughput, blocking probability, average packet delay and packet delay distribution.; Exact throughput and stability analysis is presented for a nonsymmetric FDDI network operating under asynchronous service. We outline the stability regions of the FDDI network under general traffic configurations. An analytic procedure is developed to identify the stable stations and compute the throughput level achieved at the heavily loaded stations.; The analytic methods studied here provide a useful mathematic framework for better understanding of the queueing behavior of the FDDI token ring.