Optimising multiple aspects of network survivability

W. Pullan
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引用次数: 8

Abstract

It is generally accepted that survivable networks tend to consist of network elements (nodes and links) where no individual element is significantly more important than any other element. Using a traffic based network survivability metric Si, which quantifies the impact of removing network element i from a network of N elements, this paper investigates the modification of link capacities to simultaneously maximise average network survivability (1/N/spl Sigma//sub i=1//sup N/S/sub i/) and minimise the variability of Si (var(Si)). For some networks there appears to be an unique optimal set of link capacities however, for others, a number of possible optima exist. For these networks a Pareto-optimal set was generated so that a decision could be made on which link enhancements should be performed. The change in optima as a consequence of changes in the budget for link enhancements and also in changes in the required network traffic load were also investigated.
优化网络生存能力的多个方面
人们普遍认为,可生存的网络往往由网络元素(节点和链接)组成,其中没有任何一个元素明显比任何其他元素更重要。使用基于流量的网络生存性度量Si,量化从N个元素的网络中删除网络元素i的影响,本文研究了链路容量的修改,以同时最大化平均网络生存性(1/N/spl Sigma//sub i=1//sup N/S/sub i/)和最小化Si的可变性(var(Si))。对于某些网络,似乎存在一组唯一的最优链路容量,但对于其他网络,则存在许多可能的最优链路容量。对于这些网络,生成了一个帕累托最优集,以便决定应该对哪些链路进行增强。还研究了由于链路增强预算的变化和所需网络流量负载的变化而导致的最优值的变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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