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Issue No. 06 - June (2013 vol. 25)
ISSN: 1041-4347
pp: 1368-1379
Azin Arya , Dept. of Networks & Comput. Sci., Inst. Telecom ParisTech, Paris, France
Philippe Godlewski , Dept. of Networks & Comput. Sci., Inst. Telecom ParisTech, Paris, France
Marine Campedel , Dept. of Signal & Image Process., Inst. Telecom ParisTech, Paris, France
Ghislain du Chene , Dept. of R&D, SFR, Boulogne-Billancourt, France
Location fingerprinting is a positioning method that exploits the already existing infrastructures such as cellular networks or WLANs. Regarding the recent demand for energy efficient networks and the emergence of issues like green networking, we propose a clustering technique to compress the radio database in the context of cellular fingerprinting systems. The aim of the proposed technique is to reduce the computation cost and transmission load in the mobile-based implementations. The presented method may be called Block-based Weighted Clustering (BWC) technique, which is applied in a concatenated location-radio signal space, and attributes different weight factors to the location and radio components. Computer simulations and real experiments have been conducted to evaluate the performance of our proposed technique in the context of a GSM network. The obtained results confirm the efficiency of the BWC technique, and show that it improves the performance of standard k-means and hierarchical clustering methods.
Databases, Clustering algorithms, Mobile communication, Equations, Training, Vectors, Context, machine learning, Wireless systems, ubiquitous computing, location-dependent and sensitive

G. du Chene, M. Campedel, P. Godlewski and A. Arya, "Radio Database Compression for Accurate Energy-Efficient Localization in Fingerprinting Systems," in IEEE Transactions on Knowledge & Data Engineering, vol. 25, no. , pp. 1368-1379, 2013.
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