Active learning driven data acquisition for sensor networks

Anish Muttreja, Anand Raghunathan, Srivaths Ravi, Niraj K. Jha

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

Online monitoring of a physical phenomenon over a geographical area is a popular application of sensor networks. Networks representative of this class of applications are typically operated in one of two modes, viz. an always-on mode where every sensor reading is streamed to a base station, possibly after in-network aggregation, and a snapshot mode where a user queries the network for an instantaneous summary of the observed field. However, a continuum of data acquisition policies exists between these two extreme modes, depending upon the rate and manner in which each sensor node is queried. In this work, we explore this continuum to improve network energy efficiency. We present a data acquisition framework that models the evolution of the observed data field at each sensor location as a function of time and uses an active learning based criterion to intelligently sample each sensor. Sensor nodes in our framework are organized in a clustered hierarchy, Time-dependent models of sensor readings are maintained at cluster-head nodes, which sample nodes in their cluster in a way that minimizes total energy consumption while maintaining confidence bounds on the overall model. We use sparse Gaussian processes to model sensor readings and variance minimization based active learning to intelligently select sensor nodes for querying. Finally, we present simulation results demonstrating up to 70% savings in total network energy, compared to the base case, in which sensors are sampled according to a cyclic schedule.

Original languageEnglish (US)
Title of host publicationProceedings - 11th IEEE Symposium on Computers and Communications, ISCC 2006
Pages929-934
Number of pages6
DOIs
StatePublished - Dec 1 2006
Event11th IEEE Symposium on Computers and Communications, ISCC 2006 - Cagliari, Sardinia, Italy
Duration: Jun 26 2006Jun 29 2006

Publication series

NameProceedings - International Symposium on Computers and Communications
ISSN (Print)1530-1346

Other

Other11th IEEE Symposium on Computers and Communications, ISCC 2006
CountryItaly
CityCagliari, Sardinia
Period6/26/066/29/06

All Science Journal Classification (ASJC) codes

  • Software
  • Signal Processing
  • Mathematics(all)
  • Computer Science Applications
  • Computer Networks and Communications

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    Muttreja, A., Raghunathan, A., Ravi, S., & Jha, N. K. (2006). Active learning driven data acquisition for sensor networks. In Proceedings - 11th IEEE Symposium on Computers and Communications, ISCC 2006 (pp. 929-934). [1691142] (Proceedings - International Symposium on Computers and Communications). https://doi.org/10.1109/ISCC.2006.23