Mobility-assisted node localization based on TOA measurements without time synchronization in wireless sensor networks

Hongyang Chen, Bin Liu, Pei Huang, Junli Liang, Yu Gu

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

Wireless sensor networks (WSNs) have been proposed for a multitude of location-dependent applications. To stamp the collected data and facilitate communication protocols, it is necessary to identify the location of each sensor. In this paper, we discuss the performance of two novel positioning schemes, which use two generalized geometrical localization algorithms to achieve an accurate estimation based on time-ofarrival (TOA) measurements without time synchronization. In order to improve the network performance and address the limitations of static WSNs on position estimation, a mobile anchor is utilized effectively and two attractive movement strategies for mobile anchor are designed accordingly. The effectiveness of our approaches is validated and compared with the traditional Trilateration method by extensive simulations.

Original languageEnglish
Pages (from-to)90-99
Number of pages10
JournalMobile Networks and Applications
Volume17
Issue number1
DOIs
StatePublished - Feb 2012
Externally publishedYes

Keywords

  • Geometrical location
  • TOA
  • Wireless sensor networks

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