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  • Research Article
  • Open Access

A Wireless Sensor Network for RF-Based Indoor Localization

  • 1Email author,
  • 1,
  • 2,
  • 1 and
  • 1
EURASIP Journal on Advances in Signal Processing20082008:731835

  • Received: 14 August 2007
  • Accepted: 26 March 2008
  • Published:


An RF-based indoor localization design targeted for wireless sensor networks (WSNs) is presented. The energy-efficiency of mobile location nodes is maximized by a localization medium access control (LocMAC) protocol. For location estimation, a location resolver algorithm is introduced. It enables localization with very scarce energy and processing resources, and the utilization of simple and low-cost radio transceiver HardWare (HW) without received signal strength indicator (RSSI) support. For achieving high energy-efficiency and minimizing resource usage, LocMAC is tightly cross-layer designed with the location resolver algorithm. The presented solution is fully calibration-free and can cope with coarse grained and unreliable ranging measurements. We analyze LocMAC power consumption and show that it outperforms current state-of-the-art WSN medium access control (MAC) protocols in location node energy-efficiency. The feasibility of the proposed localization scheme is validated by experimental measurements using real resource constrained WSN node prototypes. The prototype network reaches accuracies ranging from 1 m to 7 m.With one anchor node per a typical office room, the current room of the localized node is determined with 89.7% precision.


  • Wireless Sensor Network
  • Medium Access Control
  • Receive Signal Strength Indicator
  • Anchor Node
  • Radio Transceiver

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Authors’ Affiliations

Department of Computer Systems, Tampere University of Technology, P.O. Box 553, 33101 Tampere, Finland
Nokia, Devices R&D, Visiokatu 3, 33720 Tampere, Finland


© Ville A. Kaseva et al. 2008

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.