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Both energy efficiency and high data relevancy are crucial for wireless sensor network applications. Network clustering and event-driven protocols are two main approaches typically used to fulfill those requirements. Existing techniques are either focused only on performance of clusterheads or too restricted to specific applications; however, few of previous work took advantage of the combination of both approaches. In this paper, the authors formalize the combined problem of network clustering in an event-driven manner, show its NP-Completeness and present an innovative distributed heuristic solution.
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