基于链路重要度的电力通信网链路保护方法

Link Protection Method based on Link Importance in Power Communication Networks

传统的链路保护方法大多基于网络拓扑结构和网络流量,很少考虑网络中传输业务的类别和特征。为此,创新性地提出了一种基于链路重要度的链路保护方法。该方法首先从网络拓扑角度提出一种链路贡献值模型,以计算各链路对整个网络的可靠性贡献值,然后与各链路上承载的业务相结合,构建出一种链路重要度模型。基于链路重要度,可以在给定网络可靠性的条件下,找出数量最少且链路重要度之和最大的保护链路。最后,以一个骨干网网络拓扑实例对模型进行计算分析,证明所提方案的可行性。与传统链路保护方法相比,该方法充分考虑了网络拓扑和业务特征两个重要因素,结果更具全面性和准确性,对电力通信网中的针对性链路保护具有指导意义。

Traditional link protection methods are mostly based on network topology and network traffic, with little regard for the categories and characteristics of the services transported in the network. For this reason, the link protection method based on link importance is proposed innovatively. In this method, a link contribution model is ＇firstly proposed, with which the contribution to the reliability of the whole network can be calculated. Then a link-importance model is constructed in combination with the link-carried service. Based on this method, the minimum number of protected links with maximum link-importance can be found, thus to meet network reliability demands. Finally with backbone network topology as a practical example, calculation and analysis on the model indicate the feasibility of the proposed scheme. Compared with traditional link protection methods, this method gives full consideration to the network topology and servic characteristic, and the result is more comprehensive and accurate, and thus it is of guiding significance for link protection in power communication networks.