network and bus with low-delay

Fibre channel is the newest technology of network and bus with low-delay, good-compatibility, highly-reliable, high-speed and long-distance. It supports multiple medias and devices and make it possible to support protocols of channel or net-work with the same interface.The Fibre channel arbitrated loop is the third and most recent addition to the The Fibre channel family of interconnection topologies. It is ideal for many small to mid-sized configurations where the cost of a sepatate fabric switch would be prohibitive. Arbitrated loop applications include storage subsystems, processor clustering, work group networking, and many other environments requiring modest connectivity combined with high transmission speeds.This thesis mainly proposes the configuration of Fiber channel, topologies and Principle of Fibre channel arbitrated loop. Aiming at the fairness Algorithm of arbitrated loop, I propose two modified schemes to improve the efficiency and latency.Sending time allocation of arbitrated loop of fibre channel is made to serve the purpose of real time transmission through the Internet. For real time communication and the application of arbitrated loop of fibre channel in the environment of real time communication, we have proposed sending time allocation scheme based on the periodical task model in real time system.