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  • Research Article
  • Open Access

An Energy-Efficient Framework for Multirate Query in Wireless Sensor Networks

  • 1Email author,
  • 1,
  • 1,
  • 2,
  • 2,
  • 2 and
  • 2
EURASIP Journal on Wireless Communications and Networking20072007:048984

  • Received: 30 September 2006
  • Accepted: 6 April 2007
  • Published:


Minimizing the communication overhead is always a hot topic in wireless sensor networks. In a multirate query system, data sources disseminate the data streams to users at the frequency they request. However, sending data in different frequencies to individual users is very costly. We address this problem by broadcasting a single consolidated data stream, aiming at reducing the amount of transmitted data. Taking into account the data correlation, we can reconstruct the data streams at lower frequencies from the consolidated stream at a higher frequency. In this paper, we propose an energy-efficient framework to process multirate queries and investigate the path-sharing routing tree construction method together with the rate conversion mechanism. We evaluate both the accuracy and energy efficiency by simulation. Simulation results indicate that with a reasonable level of tolerance, the performance gain is significant. As far as we know, this is the first energy-efficient solution for multirate query in wireless sensor networks.


  • Energy Efficiency
  • Wireless Sensor Network
  • Rate Conversion
  • Transmitted Data
  • Data Stream


Authors’ Affiliations

School of Computer, National University of Defense Technology, Changsha, Hunan, 410073, China
Department of Computing, The Hong Kong Polytechnic University, Hung Hom, Hong Kong


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© Yingwen Chen et al. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.