Internet动态节点特性的层级相关性研究

Research on Correlation Between Internet Measurement Levels and Dynamic Nodes Characteristics

为了探究Internet拓扑动态节点演化特征的层级相关性,基于CAIDA项目授权的海量数据,结合网络科学的思想,分析了不同尺度下网络结构的演化机制.针对IP级与AS级拓扑,对层级与节点动态特性的相关性进行了分析,其中包括新生与消亡节点的动态变化比例、偏好依附、稳定连接数目等多个特性.结果表明:IP级拓扑节点的新陈代谢比AS级旺盛,IP级拓扑新生节点的非优先连接"偏好"比AS级稳定,新生连接中IP级拓扑的稳定连接数较多.IP级与AS级动态节点的演化有本质不同,为理解Internet的演化机制提供了基础.

Introducing network science theories, the evolution mechanisms of different network scales were analyzed based on lots of data provided by the CAIDA project. As to the topologies of IP-level and AS-level, the correlation between the two levels and the characteristics of dynamic nodes were analyzed, including the dynamically changing proportion of birth/death nodes, preferential attachments and the number of stable attachments. The conclusions are as follows： firstly, IP-level nodes are more active; secondly, the evolution of IP-level non-preferential attachments is more stable, and thirdly, the number of IP-level stable attachments is much greater. The evolutions of the dynamic nodes in different measure levels are different in essence, which can provide a valid basis for understanding the Internet evolution mechanism.