From owner-freebsd-hackers Mon May 8 18:52: 0 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from picnic.mat.net (picnic.mat.net [206.246.122.133]) by hub.freebsd.org (Postfix) with ESMTP id 81AC837BAA5; Mon, 8 May 2000 18:51:56 -0700 (PDT) (envelope-from chuckr@picnic.mat.net) Received: from localhost (chuckr@localhost [127.0.0.1]) by picnic.mat.net (8.9.3/8.9.3) with ESMTP id VAA03483; Mon, 8 May 2000 21:52:01 -0400 (EDT) (envelope-from chuckr@picnic.mat.net) Date: Mon, 8 May 2000 21:52:01 -0400 (EDT) From: Chuck Robey To: Warner Losh Cc: Nate Williams , Mike Smith , hackers@FreeBSD.ORG Subject: Re: [OT] Finding people with GSM phones (was Re: GPS heads up ) In-Reply-To: <200005090144.TAA81887@harmony.village.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Mon, 8 May 2000, Warner Losh wrote: > In message Chuck Robey writes: > : I'm not trying to tell you you're wrong, but I'm having trouble connecting > : the dots. Is my lady informant all wet? Or, am I misunderstanding you? > > The syncing isn't for the initial sync like you are talking about. It > is to reject messages that get to the phone by multi-path. The phone > knows what's valid and what isn't and to do that has to know what time > it is. It isn't to start the sync either, because of the same > multipath and atmospherics introducing variations in the propigation > times. There are also some other uses for timing that I know I've > forgotten over time. Gotcha. Thanks! ---------------------------------------------------------------------------- Chuck Robey | Interests include C & Java programming, FreeBSD, chuckr@picnic.mat.net | electronics, communications, and signal processing. New Year's Resolution: I will not sphroxify gullible people into looking up fictitious words in the dictionary. ---------------------------------------------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message