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Co-Grid: an efficient coverage maintenance protocol for distributed sensor networks

Published: 26 April 2004 Publication History

Abstract

Wireless sensor networks often face the critical challenge of sustaining long-term operation on limited battery energy. Coverage maintenance protocols can effectively prolong network lifetime by maintaining sufficient sensing coverage over a region using a small number of active nodes while scheduling the others to sleep. We present a novel distributed coverage maintenance protocol called the Coordinating Grid (Co-Grid). In contrast to existing coverage maintenance protocols which are based on simpler detection models, Co-Grid adopts a distributed detection model based on data fusion that is more consistent with many distributed sensing applications. Co-Grid organizes the network into coordinating fusion groups located on overlapping virtual grids. Through coordination among neighboring fusion groups, Co-Grid can achieve comparable number of active nodes as a centralized algorithm, while reducing the network (re-)configuration time by orders of magnitude. Co-Grid is especially suitable for large and energy-constrained sensor networks that require quick (re-)configuration in response to node failures and environmental changes. We validate our claims by both theoretical analysis and simulations.

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        cover image ACM Conferences
        IPSN '04: Proceedings of the 3rd international symposium on Information processing in sensor networks
        April 2004
        464 pages
        ISBN:1581138466
        DOI:10.1145/984622
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        Published: 26 April 2004

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        Author Tags

        1. coverage
        2. data fusion
        3. distributed detection
        4. energy conservation
        5. sensor networks

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