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International Journal of Distributed Sensor Networks
Volume 2 (2006), Issue 1, Pages 23-54
http://dx.doi.org/10.1080/15501320500330711
Original Article

BBS: An Energy Efficient Localized Routing Scheme for Query Processing in Wireless Sensor Networks

1Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario, Canada
2Database Research Group, Department of Computer Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
3Database Research Group, School of Computer Science, University of Waterloo, Waterloo, Ontario, Canada

Copyright © 2006 Hindawi Publishing Corporation. 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.

Abstract

A wireless sensor network (WSNET) can support various types of queries. The energy resource of sensors constrains the total number of query responses, called query capacity, received by the sink. There are four problems in the existing approaches for energy-efficient query processing in WSNETs:

the fact that sensors near the sink drain their energy much faster than distant sensors has been overlooked,

routing trees (RT) are rooted at the sink, and therefore, aggregative queries are less energy-efficient,

data reception cost has been ignored, and

flooding is used in query distribution or RT construction.

In this paper, we propose a Broadcasting-Based query Scheme (BBS) to address the above problems. BBS reduces the energy depletion rate of sensors near the sink, builds different localized RTs for different query types, and eliminates the flooding cost of query distribution. Compared to the existing approaches, simulation studies show that BBS produces significant improvement in the query capacity for non-holistic queries (10%—100% capacity improvement) and holistic queries (up to an order of magnitude of capacity improvement).