Save yourself alot of time and headache and use a Geo Location Library or Api. It will handle the dirty work for you _______________________________________________ *Good judgement comes from Experience.* *Most Experience comes from Bad Judgement * _______________________________________________ * * 2011/8/22 Kinuthia Ngugi <kinuthia.ngugi@gmail.com>
Am afraid in GSM, the TA and serving cell is as narrow as it can get. You can not hope to have more than half a kilometer precision. Normaly, timing advance goes in units of 550m, so TA 0 means 550m form the BTS, TA 1 means 1.1KM, so and on. Then there is the issue of how wide a cell's coverage is; you could be having a BTS on a hill with an antenna that has a 90deg beamwidth in the far field....that could mean a span of like 10km across that field, so even if the TA tells you are 3km from the BTS, but in which direction? North or South or East? such are the challenges. All the best though.
On Mon, Aug 22, 2011 at 10:11 AM, hellen masita <hellenmasita@hotmail.com>wrote:
Hi skunks/skunkettes,
in line with an earlier discussion on this being a technical forum...
May i call upon your help without monetary gains taking an upper hand???? please :)
i want to try and create an application for triangulating a mobile phone. i am at a loss on where to start....really!!! so i throw it to the floor.
******************* In a GSM network with than one vendor a proprietary software is normally supplied to handle their equipment including the BTS.
Mobile phones however send *Measurement reports* which are standardized.
these reports contain the following,
1. signal level of 6 best neignbours 2. signal quality\level of serving cell 3. the BTS can determine the Timing Advance of the Mobile(The distance (usually a range) the mobile is from the bts) as well as serving cell (Sector)
Now, with just the *Timing Advance*(TA) and *Serving cell*, i can tell the general direction of a user. however i would like to use the other measurements to narrow down the location
*************************
The significance of this is that it a network can track a phone that does not have a GPS. it would make phone thefts less bothersome among things.
*If guys discuss it for a bit, i'm sure i'll find my footing,*
regards,
Hellen
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