Abstract: By studying the complex network theory, this paper introduced the main features of a complex network of several metrics, and analyzed the characteristics of wireless sensor networks. A wireless sensor networks degree distribution, clustering coefficient, characteristic path length, network connectivity and other features were listed. This paper studied the relationship between the number of nodes, communication radius and the rate of connectivity. The data obtwined from the simulation shows,increasing the node cannot fully guarantee connectivity of the network, but can only increase the probability of connecting, increasing emission radius can quickly make the network connect. Therefore, if the conditions allow, to select sensors of a larger emission radius is better than to layout more sensors. Finally, the article described a method which is suitable for wireless sensor networks to assess betweenness.

Key words: Degree distribution, Clustering coefficient, Characteristic path length, Network connectivity, Betweenness