浅谈边失效可靠性研究的主要内容及进展

Introduction of Edge Failure Reliability

无论对于点失效、边失效还是点边混合失效网络模型,精确计算任意网络的可靠度都是NP-hard问题;随着现代网络规模的不断扩大,快速精确地计算可靠度是一个摆在我们面前的现实难题.因此,部分研究者关注于网络可靠度上下界的确定问题.采用相对简单的计算方法,通过网络可靠度上下界值评估网络可靠性,以此对网络可靠性分析和可靠性综合提供有价值的参考依据.针对网络可靠性分析和综合的研究十分活跃,内容也十分丰富,主要包括边失效情况下网络可靠性的分析与设计,点失效情况下网络可靠性的分析与设计和点边混合失效情况下网络可靠性的分析与设计,主要针对网络在规定的条件下和规定的时间内的生存能力和网络在规定的条件下和规定的时间内完成规定任务的能力.

In reality ,because of the nodes of the network and link circuit failure ,some network function is reduced ,and even the whole network become invalid .So analyzing the reliability of network and desig‐ning a reliable network are of great significance .Either point invalidity ,edge invalidity or the mixed failure network model ,precise calculation of arbitrary network reliability is NP -hard problem .With the continu‐ous expansion of modern network ,quickly and accurately calculate reliability is a realistic problem in front of us .Therefore ,some researchers focus on upper and lower boundary of network reliability problems ,u‐sing relatively simple calculation method ,w hich provides a valuable reference basis for the analysis of net‐work reliability and network reliability integration .Research for network reliability analysis and integration is extremely active ,and the content is very rich ,including on the condition of edge invalidity ,network re‐liability analysis and integration ,compared the case of network reliability point of failure analysis and de‐sign with mixed -point edge network under failure conditions reliability analysis and design ,mainly for network’s ability to survive in specified condition and in limited time ,and within the stipulated time to complete the task .