Supporting Aggregate Queries Over Ad-Hoc Wireless Sensor Networks

  • Authors:
  • Samuel Madden;Robert Szewczyk;Michael J. Franklin;David Culler

  • Affiliations:
  • -;-;-;-

  • Venue:
  • WMCSA '02 Proceedings of the Fourth IEEE Workshop on Mobile Computing Systems and Applications
  • Year:
  • 2002

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Abstract

We show how the database community's notion of a generic query interface for data aggregation can be applied to ad-hoc networks of sensor devices. As has been noted in the sensor network literature, aggregation is important as a data-reduction tool; networking approaches, however, have focused on application specific solutions, whereas our in-networkaggregation approach is driven by a general purpose, SQL-style interface that can execute queries over any type of sensor data while providing opportunities for significant optimization. We present a variety of techniques to improve the reliability and performance of our solution.We also show how grouped aggregates can be efficiently computed and offer a comparison to related systems and database projects.