Adaptive WSN Scheduling for Lifetime Extension in Environmental Monitoring Applications

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Title: Adaptive WSN Scheduling for Lifetime Extension in Environmental Monitoring Applications
Authors: Lim, Jong Chern
Bleakley, Chris J.
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Date: 2012
Abstract: Wireless sensor networks (WSNs) are often used for environmental monitoring applications in which nodes periodically measure environmental conditions and immediately send the measurements back to the sink for processing. Since WSN nodes are typically battery powered, network lifetime is a major concern. A key research problem is how to determine the data gathering schedule that will maximize network lifetime while meeting the user's application-specific accuracy requirements. In this work, a novel algorithm for determining efficient sampling schedules for data gathering WSNs is proposed. The algorithm differs from previous work in that it dynamically adapts the sampling schedule based on the observed internode data correlation as well as the temporal correlation. The performance of the algorithm has been assessed using real-world datasets. For two-tier networks, the proposed algorithm outperforms a highly cited previously published algorithm by up to 512% in terms of lifetime and by up to 30% in terms of prediction accuracy. For multihop networks, the proposed algorithm improves on the previously published algorithm by up to 553% and 38% in terms of lifetime and accuracy, respectively.
Funding Details: Enterprise Ireland
Type of material: Journal Article
Publisher: Hindawi Publishing Corporation
Journal: International Journal of Distributed Sensor Networks
Volume: 2012
Issue: 286981
Start page: 1
End page: 17
Copyright (published version): 2012 the Authors
Keywords: SchedulingSpatial correlationTemporal correlationPredictionWireless sensor networks
DOI: 10.1155/2012/286981
Language: en
Status of Item: Peer reviewed
Appears in Collections:Computer Science Research Collection
CASL Research Collection

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