一种通信网拓扑脆弱性评估算法设计与仿真

Design and Simulation of Communication Network Topology Vulnerability Evaluation Algorithm

为避免发生通信安全事故,提高通信网络传输成功率,提出基于分形机理的通信网拓扑脆弱性评估方法。将通信网络整体看作一个有权无向网络,通过网络连接矩阵分析节点之间的业务相关性,结合分形理论的相关性特征,计算分形维数,构建通信网拓扑传输模型,探究信息传输方式,提高评估准确性;通过富者俱乐部系数描述节点连接紧密度,凭借熵值探究网络节点有序性,将节点中心化程度、链路介数和传输延时作为脆弱性评估指标;根据通信分形模型,选取参与通信的节点与链路,在物理层与业务层双重约束下构建综合评估函数,实现拓扑脆弱性评估。仿真结果表明,所提方法可准确评估出不同攻击模式下通信网拓扑脆弱性,同时针对不同类型网络也能得到理想的评估效果。

In order to avoid communication accidents and improve the transmission success rate of communication networks, this article proposed a method to assess communication network topology vulnerability based on fractal mechanism. The communication network was regarded as a weighted-undirected network at the outset. Then the service correlation between nodes was analyzed through link matrix. Combined with the correlation characteristics of fractal theory, the fractal dimension was calculated, and the network topology transmission model was constructed. In addition, the information transmission mode was explored to improve the evaluation accuracy. The tightness between nodes was described by rich club coefficients, and the order of network nodes was explored by entropy. After that, the degree of node centralization, betweenness of link and transmission delay were used as vulnerability evaluation indexes. Based on the communication fractal model, the nodes and links participating in the communication were selected. Under the double constraints of the physical layer and service layer, the comprehensive evaluation function was constructed. Finally, the topology vulnerability assessment was achieved. Simulation results show that the proposed method can accurately evaluate the topology vulnerability of the communication network under different attack modes. Meanwhile, this method can get ideal evaluation results for different types of networks.