Yuquan Zhang

A Security Strategy Based on Two-Dimension Location for Hierarchical Wireless Heterogeneous Sensor Networks

A key management scheme based on multi-dimension location is presented for heterogeneous wireless hierarchical sensor networks. The wireless sensor networks consist of some nodes that have greater power and transmission capability than other sensor nodes. All kinds of nodes are deployed evenly in sensing multi-dimensional hypercube respectively. The sensing hypercube is divided into a number of small same hypercubes for all kinds of nodes and then some of those small same hypercubes consist of a logical group for those heterogeneous nodes. The wireless sensor network has a two-tier structure. The upper layer consists of all cluster heads, namely heterogeneous sensor nodes and the lower layer consists of all ordinary sensors managed by their corresponding cluster heads. This paper investigates how the heterogeneous sensor nodes enhance the performance of wireless sensor networks. Pairwise keys are established between all kinds of nodes through employing the concept of the overlap key sharing and the random key predistribution scheme. Analysis shows the heterogeneous nodes improve the security and connectivity for wireless sensor networks, moreover, they extend the network lifetime.