FC互连的可靠性建模

对于光纤通道 (FC)互连的可靠性计算问题,从FC的基本模型出发,提出了基于任务的系统可靠性分析方法,建立了FC互连系统的可靠性模型,并给出了系统可靠度矩阵的表达形式.针对FC互连3种基本拓扑结构:点到点、仲裁环和交换网络,根据可靠性模型直接给出了表达式;针对FC组合拓扑结构连通性的特点,在可靠性模型中引入桥端口的概念,给出了组合拓扑结构互连可靠性模型的表示方法;针对FC协议中的交换网络和仲裁环组合拓扑结构互连给出了建模实例,通过分析桥端口对任务路径的影响,得到了桥端口对于FC互连可靠性影响最大的结论.基于任务的可靠性建模和计算方法在航电系统设计阶段对于任务划分和拓扑选择都将起到指导作用.

On reliability model of FC interconnections

To solve calculable problem of the reliability of fibre channel (FC) interconnection, based on basic FC interconnection model, a task based analysis method of system reliability was proposed, a reliability model of FC interconnection system was developed and the matrix of system reliability was used to describe reliability model. To three basic topologies of FC: point-to-point, arbitrated loop and Fabric, expressions were directly defined by reliability model. Based on combination topology of FC, the bridge-port in reliability model was defined, a reliability model of combination topology with bridge-port was developed. To a combination topology of Fabirc and arbitrated loop, an illustration of modeling avionics of FC network was also presented. By analysing the influence of bridge-port in task route, it is showed that bridge-port influences reliability of FC interconnection system most. The reliability model of task based has a directive effect on both task division and topology selection in the phase of avionics system design.