摘要
研究了通信网络在不同通信负载下的鲁棒性问题。采用BA无标度网络作为通信网络模型,采用大度节点优先的局域结构路由策略,研究了网络在自由畅通态的级联故障。仿真研究表明:网络的鲁棒性、平均效率随网络中信息产生速率的增加而减小;当网络处于临界拥塞态时,攻击网络中10%的节点,网络中会有约50%的节点由于级联而失效,攻击网络中20%的节点就会使网络的效率变为零;当网络中节点负荷较轻时,攻击网络中40%～50%的最大度节点也可使得整个网络崩溃。
The robustness problem is studied under different traffic loads on communication networks.The cascading failure on a BA scale-free network is analyzed after some max-degree nodes attacked when the network is in the free-flow state,useing the local structural information routing strategy and giving the priority to those nodes with big degrees.Simulation shows that both the robustness and the average efficiency of the network reduce with the increase of the packet generation rate when the network is in the free-flow state.In critical congestion state,about 50 percent nodes will become failure through cascading when 10 percent big nodes are attacked and the network＇s efficiency will become zero when 20 percent big nodes are attacked.In the free-flow state with light load,attacking 40～50 percent big nodes will make the whole network collapse.
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2012年第3期83-87,共5页
Journal of Guangxi Normal University:Natural Science Edition
基金
国家自然科学基金资助项目(11062001
11165003)
关键词
复杂网络
级联故障
信息传输
complex network
cascading failure
information transmission
