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Sensors 2010, 10(2), 1176-1215; doi:10.3390/s100201176

Cooperative Anchor-Free Position Estimation for Hierarchical Wireless Sensor Networks

Department of Electrical Engineering, Graduate Institute of Communication Engineering, National Chung Hsing University, Taichung 402, Taiwan
Author to whom correspondence should be addressed.
Received: 30 December 2009 / Revised: 27 January 2010 / Accepted: 27 January 2010 / Published: 1 February 2010


This paper proposes a distributed algorithm for establishing connectivity and location estimation in cluster-based wireless sensor networks. The algorithm exploits the information flow while coping with distributed signal processing and the requirements of network scalability. Once the estimation procedure and communication protocol are performed, sensor clusters can be merged to establish a single global coordinate system without GPS sensors using only distance information. In order to adjust the sensor positions, the refinement schemes and cooperative fusion approaches are applied to reduce the estimation error and improve the measurement accuracy. This paper outlines the technical foundations of the localization techniques and presents the tradeoffs in algorithm design. The feasibility of the proposed schemes is shown to be effective under certain assumptions and the analysis is supported by simulation and numerical studies. View Full-Text
Keywords: anchor-free localization; cooperative estimation fusion; wireless sensor networks anchor-free localization; cooperative estimation fusion; wireless sensor networks

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Wen, C.-Y.; Hsiao, Y.-C.; Chan, F.-K. Cooperative Anchor-Free Position Estimation for Hierarchical Wireless Sensor Networks. Sensors 2010, 10, 1176-1215.

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