More than a phone with a GPS navigator

joerg joerg.twinklephone at
Fri Mar 28 12:57:46 CET 2008

Am Fr  28. März 2008 schrieb Andy Green:
GSM not only holds information on recent "active" (booked in) cell, but also 
for next 6 (or 8?) next best cells, to handle cell handover. Each of these 
cells with same info (signal, channel...) like active cell.

And then there is time advance too. It tells in increments of 180m (IIRC) the 
distance of MS to BS. (Used to calibrate MS to fit nicely in the time 
division multiplex at BS receiver)

Anyway it is not (yet) clear whether we may get this info from GSM modem (just 
received the data sheets, pfff: 15meg!) If we can get, positioning via GSM 
may be magnitude more accurate.


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