基于可靠性指标的通信网链路重要性评估方法

Evaluation Method of the Link Significance of Communication Network Based on Reliability Index

为了全面和客观地评估通信网各链路的重要性,引入了归一化容量加权可靠性指标概念,并从通信网络总体及局部两个考察角度均定义了指标,其一是研究涵盖网络所有节点之间可靠性的总容量归一化加权可靠性指标,另一是只研究指定两节点间可靠性的最大容量归一化加权可靠性指标。研究出一套自成体系的可靠性指标计算方法,由于算法将所有运算环节均转化为代数或逻辑代数化计算,所以易于用计算机编程运算,解决了人工计算繁琐问题,论证了算法的正确性与合理性。以链路失效对可靠性指标影响程度作为评价标准,介绍了评估链路重要性的方法。通过算例详细计算一种典型拓扑结构通信网络的可靠性指标,并从不同角度评估了各链路的重要性。

In order to evaluate the significance of each link of a communication network comprehensively and objectively, this paper introduced the normalized reliability index weighted by capacity, which is defined totally and locally respectively. One definition is the normalized reliability index weighted by the total capacity between all the network nodes and the other definition is the normalized reliability index weighted by the maximum capacity between two appointed nodes. This paper studied a systematical algorithm of reliability index, for which all the calculations are transformed to be algebraic and logic, so it is easy to design program and the complex manual calculations are avoided. The correctness and rationality are validated. By taking the effect degree of link invalidation on the reliability index as the evaluation criterion, the evaluation method of the link significance is introduced. As an example, the reliability index of a communication network with typical topology is calculated in detail, which evaluated the link significance from different aspects.