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Constructing Battery-Aware Virtual Backbones in Wireless Sensor Networks

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Abstract

A critical issue in battery-powered sensor networks is to construct energy efficient virtual backbones for network routing. Recent study in battery technology reveals that batteries tend to discharge more power than needed and reimburse the over-discharged power if they are recovered. In this paper we first provide a mathematical battery model suitable for implementation in sensor networks. We then introduce the concept of battery-aware connected dominating set (BACDS) and show that in general the minimum BACDS (MBACDS) can achieve longer lifetime than the previous backbone structures. Then we show that finding a MBACDS is NP-hard and give a distributed approximation algorithm to construct the BACDS. The resulting BACDS constructed by our algorithm is at mostopt size, where is the maximum node degree and opt is the size of an optimal BACDS. Simulation results show that the BACDS can save a significant amount of energy and achieve up to longer network lifetime than previous schemes.

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Correspondence to Chi Ma.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Ma, C., Yang, Y. & Zhang, Z. Constructing Battery-Aware Virtual Backbones in Wireless Sensor Networks. J Wireless Com Network 2007, 040154 (2007) doi:10.1155/2007/40154

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Keywords

  • Information System
  • Sensor Network
  • Wireless Sensor Network
  • Approximation Algorithm
  • System Application