Research on Invulnerability of Optical Fiber Backbone Network Based on Complex Network

Abstract

As a basic platform for large-capacity, long-distance and high-reliability information transmission, the optical fiber backbone network may be destroyed by natural disasters or deliberately attacked. This may make the originally connected network topology be divided, or even the entire network be paralyzed, resulting in serious economic and social losses. How to establish the survivability model of the optical fiber backbone network and measure its survivability has become a key research problem to improve the robustness of the optical fiber backbone network. Based on the theory of complex network, this paper analyses the changing characteristics of network node degree and betweenness of optical backbone network under several typical network attack strategies. By establishing the survivability model of optical backbone network and analyzing the model, the changes of network performance in the face of typical network attacks are obtained.The optical fiber backbone network is more robust and invulnerable during the random attacks, and has certain characteristics of random networks. In the face of selective attacks, the network performance of the optical fiber backbone network decreases rapidly, and the network is relatively fragile. There is a threshold for the betweenness. When the attack does not exceed the threshold, the network betweenness will increase. After exceeding the threshold, the centrality and the network performance will decline sharply.