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Relative - Locative system for a GSM Environment

Gaurav Gupta
Chief Executive, Beedance Technologies
Mailing Address: E-363, Mayur Vihar- II, New Delhi 110091
Email: info@beedance.com, garvatma@hotmail.com
Tel: 011 32305179, 22773513

Abstract
It has never been easy to find out the precise location of any mobile device in a geographic area. The fundamental question that arises is how do we intend to find out where a mobile device is? The answer lies hidden in the fact is that the power of signal received by a mobile handset drops inversely with distance, like the intensity of light falls off at square of distance from a bulb or a candle. Hence, in a hypothetical circumstance where the power of signal is not attenuated (lost, diminished, interfered or accentuated) by traveling in air, though buildings, trees, electricity sources, microwave ovens etc, a relation can be envisioned between the drop of signal strength and the physical distance between the source of the signal and the receiver.

If the distance between a transmitter and receiver calculated by measuring the drop of power between them as the Nominal Distance, the problem does not end there! Though the Nominal Distance of the Pakistani can be known, the bearing of Pakistani from the Base Station cannot be known. This means that the Pakistani maybe anywhere on a circle of ‘radius= Nominal Distance’. Establishing ranges of vicinity of other mobiles wireless devices around the Pakistani mobile and finding the Pakistani’s location relative to the neighbors can circumvent this problem. To find the bearing of the region so obtained, we take help of signals coming from the neighboring cell’s mobile phones. This not only fixes the region of Pakistani but also informs about where he is heading!