Localized algorithms for coverage boundary detection in wireless sensor networks

Chi Zhang, Yanchao Zhang, Yuguang Fang

Research output: Contribution to journalArticle

66 Scopus citations

Abstract

Connected coverage, which reflects how well a target field is monitored under the base station, is the most important performance metric used to measure the quality of surveillance that wireless sensor networks (WSNs) can provide. To facilitate the measurement of this metric, we propose two novel algorithms for individual sensor nodes to identify whether they are on the coverage boundary, i.e., the boundary of a coverage hole or network partition. Our algorithms are based on two novel computational geometric techniques called localized Voronoi and neighbor embracing polygons. Compared to previous work, our algorithms can be applied to WSNs of arbitrary topologies. The algorithms are fully distributed in the sense that only the minimal position information of one-hop neighbors and a limited number of simple local computations are needed, and thus are of high scalability and energy efficiency. We show the correctness and efficiency of our algorithms by theoretical proofs and extensive simulations.

Original languageEnglish (US)
Pages (from-to)3-20
Number of pages18
JournalWireless Networks
Volume15
Issue number1
DOIs
StatePublished - Jan 1 2009

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Keywords

  • Computational geometry
  • Connected coverage
  • Localized algorithm
  • Wireless sensor networks (WSNs)

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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