- Research Article
- Open Access
A Wireless Sensor Network for RF-Based Indoor Localization
EURASIP Journal on Advances in Signal Processing volume 2008, Article number: 731835 (2008)
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.
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Kaseva, V.A., Kohvakka, M., Kuorilehto, M. et al. A Wireless Sensor Network for RF-Based Indoor Localization. EURASIP J. Adv. Signal Process. 2008, 731835 (2008) doi:10.1155/2008/731835
- Wireless Sensor Network
- Medium Access Control
- Receive Signal Strength Indicator
- Anchor Node
- Radio Transceiver