[LINK] question re mobile phone tracking
tony at tony-barry.emu.id.au
Sun Oct 29 13:56:46 EST 2006
On 29/10/2006, at 1:21 PM, Geoffrey Ramadan wrote:
> It can only be tracked if the phone is ON. From my understanding,
> the phone needs to communicate to a Base Station it's ID. The
> Mobile network needs to know which cell the mobile phone is
> associated with in order to know where to route any phone calls.
> This does not mean it knows its location, only which network cell
> it is in.
I presume this is done by triangulation? If so you need the phone to
be received at three stations and the time delay differences to be
compared? If you were tracking position continuously I guess you
could do two stations as the two point ambiguity in the intersection
of two circles would be resolved by looking at the movement over time.
phone : 02 6241 7659 | mailto:me at Tony-Barry.emu.id.au
mobile: 04 1242 0397 | mailto:tony.barry at alianet.alia.org.au
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