At 02:57 PM 12/2/02 +0000, Peter Fairbrother wrote:

What I don't understand is how a node knows the location of a person

who

moves about in the first place.

Also, I don't like the idea that my location is known by the location of my equipment. But I know very little about geographical routing.

I'll bite. Lets think about fundamentals, and play the adversary game. If I know that you can receive in *any wireless* system, then I know something about your location. This includes nets with huge 'cells', like a 100,000 watt commercial broadcast station (are you listening to KFOO or WFOO?), and nets with smaller cells, like the 'cellular' phones and 802.11foo meshes. The only difference (albeit a significant one) is the size of the cell ---the smaller your cells the more bits I get about your location. (Barring cypherpunk jokesters who make cell calls from the foci of dishes to hit another base station...) Of course if you're needing to transmit, you give your location. If you're needing to receive, and you roam beyond the diameter of a single 'cell', you are going to have to transmit your location (think cell phones) for routing XOR the system has no routing and must broadcast to all cells (think pagers) (you might consider the physical cells merged into a large single virtual cell in this case.). This latter doesn't scale. ---- Got Yagis?