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Energy-efficient data gathering in wireless sensor networks with asynchronous sampling

Published: 24 June 2010 Publication History

Abstract

A low sampling rate leads to reduced congestion and hence energy consumption in the resource-constrained wireless sensor networks. In this article, we propose asynchronous sampling that shifts the sampling time instances of sensor nodes from each other. For lossy data gathering scenarios, the proposed approach provides more information about the physical phenomena in terms of increased entropy at a low sampling rate. For lossless data gathering scenarios, on the other hand, the sampling rate is lowered without sacrificing critical knowledge required for signal reconstruction. As lower sampling rates lead to smaller energy consumption for processing and transmitting the collected sensory data, the proposed asynchronous sampling strategies are capable of achieving a better trade-off between the lifetime of the network and the quality of collected information. In addition to mathematical analysis, simulation results based on real data also verify the benefits of our asynchronous sampling.

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Published In

cover image ACM Transactions on Sensor Networks
ACM Transactions on Sensor Networks  Volume 6, Issue 3
June 2010
320 pages
ISSN:1550-4859
EISSN:1550-4867
DOI:10.1145/1754414
Issue’s Table of Contents
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Publication History

Published: 24 June 2010
Accepted: 01 July 2009
Revised: 01 July 2009
Received: 01 November 2008
Published in TOSN Volume 6, Issue 3

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Author Tags

  1. Models
  2. asynchronous sampling
  3. data gathering
  4. energy efficiency
  5. temporal-spatial correlation
  6. wireless sensor networks

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