On Fri, 28 Mar 2008 16:00:39 +0100 "Alexey Feldgendler" <[EMAIL PROTECTED]> wrote:
> On Fri, 28 Mar 2008 14:59:42 +0100, Andy Green <[EMAIL PROTECTED]> > wrote: > > > | That's the point: while you're inside a building, all you have to > > know | is that you're still inside. > > > Well you can know where you are in the building from AP scan > > monitoring. ~ In an office building for example you might go to a > > meeting room or a cafeteria and want that as a different "place", > > but you never get to the open sky moving around between these > > places. > > Fair point about different rooms. However, attempts to locate > yourself up to room precision will fail a lot -- the range of one > WiFi AP isn't really confined within the walls of a room, so just > walking the corridor past the meeting room or sitting in an adjacent > room would trigger the meeting room profile. I don't see how it could > be made to work up to room precision. It seems to me that building > precision is the best that's practically possible. > > The signal and noise levels are usually fairly different in different rooms (at the uni I can't easily get the wireless behind the wall on the other side of corridor. * access point | wall $ me & door | | *& |$ & | | | I can't see why you can't use the noise signal levels in this way as every room will have a unique AP profile? -- Ewan Marshall (ewanm89/Cap_J_L_Picard on irc) http://ewanm89.co.uk/ Geek by nature, Linux by choice.
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