Abstract
A key scheme based on multi-dimension location is presented for heterogeneous wireless sensor networks (HWSNs). 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 space. The sensing space is divided into a number of small same hypercubes for all kinds of nodes and then some of them consist of a logical group for those heterogeneous nodes. This paper researches 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, the grid-based key pre-distribution scheme, and the random key pre-distribution scheme. Analysis shows the heterogeneous nodes improve the security and connectivity for wireless sensor networks.
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