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Wireless Personal Communications

, Volume 68, Issue 1, pp 153–173 | Cite as

Continuous Location Dependent Queries in Mobile Wireless Sensor Networks

  • Liang Hong
  • Gang Zhou
  • Bo Liu
  • Sang Son
Article

Abstract

Query processing in mobile Wireless Sensor Networks (WSNs) is still a challenging problem because sensor mobility causes frequent changes of network topology. In this paper, we study the problem of processing Continuous Location Dependent Query (CLDQ) that retrieves the sampling data of the sensors within a specific area (i.e. query area) around a mobile sensor. Existing query processing approaches can not efficiently process CLDQs with continuously moving query areas. We propose scalable techniques to process CLDQs efficiently and accurately, including a dissemination approach, a Contention-based Distance-aware Message Scheduling scheme, in which each stationary sensor’s data transmissions are smartly scheduled according to its distance to the mobile sensor, and an optimization scheme for continuous processing of CLDQs. Extensive experiments indicate that our techniques demonstrate better efficiency of processing CLDQs over state-of-the-art techniques while achieving high accuracy and short query latency under various network settings.

Keywords

Location dependent query Mobile wireless sensor network Query processing Data aggregation Dissemination 

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Copyright information

© Springer Science+Business Media, LLC. 2011

Authors and Affiliations

  1. 1.School of ComputerWuhan UniversityWuhanChina
  2. 2.Department of Computer ScienceCollege of William & MaryWilliamsburgUSA
  3. 3.College of Computer Science and TechnologyHuazhong University of Science and TechnologyWuhanChina
  4. 4.Department of Computer ScienceUniversity of VirginiaCharlottesvilleUSA

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