航空电子系统FC交换式网络的可靠性研究

 对于采用光纤通道(FC)互连的航空电子系统，从FC的基本模型出发，给出了由多个FC交换机组成的FC交换式网络的通信模型；采用基于任务的可靠性建模方法，给出了FC交换式网络的可靠性计算公式，并提出了任务基本路径的概念。根据航空电子系统提高可靠性的需要，提出了FC交换式网络的2种冗余拓扑结构：基本路径冗余和全网络冗余；最后通过实例分析了端口单元、交换要素单元和链路单元对FC交换式网络及2种冗余拓扑结构可靠性的影响；FC交换式网络可靠性的研究对于航空电子系统设计阶段的容错设计和拓扑选择都将起到指导作用。

Study on Reliability of FC Fabric in Avionic

To avionics of fibre channel(FC)interconnection,communication model of fabric that is made up of one or more FC switches is given based on basic FC interconnection model.On task based analysis method of system reliability,the reliability expression of fabric topology is given and the concept of basic path is proposed.To improve system reliability of avionics,two redundancy methods of fabric topology:basic path redundancy and whole fabric redundancy, are proposed.By an illustration in which different disabled probabilities of port,switch and link are used to compute the task reliability of fabric topology,basic path redundancy and whole fabric redundancy,the relations among task reliability and disabled probabilities of port,switch and link are analyzed.The study on reliability of fabric topologies of FC has a directive effect on both fault tolerance design and topology selection in the phase of avionics system design.