Method for Analysing the Performance Aspects of the Fault-Tolerance Mechanisms inFDDI

摘要

The high speed Fiber Distributed Data Interface (FDDI) is becoming an acceptedstandard for many real time communication networks. One of its real time applications supporting aspects is that the fault tolerance mechanisms are fast and initiated automatically. Nevertheless, occurring errors can have great influence on performance measured such as the probability of missing a deadline. The ability of the error recovery mechanisms to make FDDI satisfy real time performance constraints in the presence of errors is analyzed. A complicating factor in these analyses is the rarity of the error occurrences, which makes direct simulation unattractive. Therefore, a fast simulation technique, called injection simulation, was developed which makes it possible to analyze the performance of FDDI including its fault tolerance behavior. The implementation of injection simulation for polling models of FDDI is discussed and simulation results are shown.