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ABSTRACT

This article describes several user localization methods currently used to support locationbased services (LBS) in GSM and WCDMA mobile networks. Nowadays, many high-technology crimes rely on mobile stations (MS) and existing telecommunication networks. One way of combating fraud and other illegal activities is to perfect techniques for localizing MS almost in real time. The precision of this process varies with method and depending on whether the MS is outdoors or indoors, but generally speaking ranges from tens to hundreds of meters. Using their "mPosition" system, Nokia has achieved even greater precision in MS localization. These methods can also be used in WLAN networks.


KEYWORDS

AGPS, TOA, CI, TA, Rx Level.

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THE INTERNATIONAL JOURNAL OF FORENSIC COMPUTER SCIENCE - IJoFCS

Volume 3, Number 1, pp 51-59, DOI: 10.5769/J200801005 or http://dx.doi.org/10.5769/J200801005


Mobile Positioning Methods used in Location-Based Services in GSM, WCDMA and WLAN Networks


By Antonio Rosa, Daniel Barboni, and Paulo Quintiliano


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