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The clustering schemes devised so far mostly concentrate on satisfying the classic requirement of wireless sensor networks, which is energy awareness, to prolong network lifetime. On the other hand, there is a growing demand on applying heterogeneous nodes in sensor network applications, like distributed composite event detection that introduces new requirements such as maximizing sensor diversity for each cluster. The devised clustering schemes usually ignore this important feature. In this paper, the authors introduce a Diversity-based Energy aware Clustering protocol (DEC) that not only uses the energy level of the nodes in electing cluster heads, but also produces clusters with higher diversity of sensor types in their members.
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