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Tree-based energy-efficient algorithm for data-centric wireless sensor networks
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DOI：10.1109/AINA.2007.24.png)
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The nature of wireless sensor networks make them suitable for a great variety of applications, especially over wide areas, or in remote or hostile locations; however such environments make battery capacity an especially important concern, where replacing or recharging of batteries is infeasible for one reason or another Battery capacity restrictions on highly energy-constrained sensor networks can be mitigated, by adopting data-aggregation techniques and by managing the scheduling of nodes. These effectively reduce the overall amount of data transmitted, thereby conserving energy. In this paper we address the construction of energy-efficient data-aggregation trees, an NP-problem, in different rounds of communication, seeking to maximize the lifetime of heterogeneous sensor networks. This problem is subject to constraints on such networks: battery capacity, data-sensing scheduling, and round calculation. We derive a near-optimal primal feasible solution using Lagrangean Relaxation. The experimental results show that our proposed algorithm outperforms similar algorithms.
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AGGREGATION
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