From:	Dave Sherohman <esper@*****.IMA.UMN.EDU>
Subject:	Re: Dangers Of Portable Phones: Pt II
Date:	Tue, 22 Mar 1994 02:20:28 CST

From: Quid Non <jdfalk%CAIS.COM@***.spcs.umn.edu>
> Also, you would _have_ to triangulate the signal in order to find
>out where it is. Technologically speaking, there is no other way to do
>it, because the phone broadcasts in all directions at once. And, _all_
>the cel "antennas" send out the signal for _every_ call, so that a phone
>user can move from cel to cel while driving, or whatever.

A lot of good points, but this one is off. The reason for the locator
beacon in the phone is to let the system know which cel antennas the phone
is closest to, so that only, say, 5 cel antennas have to broadcast the
call. (I got 5 from the nearest antenna plus the next one north, south,
east, and west. It could easily be more, but now that I think about it,
it would make more sense to set up the transmission ranges up to be at least
twice the distance between cel antennas - this reduces the number of cels
required to transmit to 1 (the one nearest the phone, of course) and also
allows the user to pass through cels with nonfunctional transceivers without
interruption of service.)

esper@***.umn.edu