Date: Mon, 22 Jan 2001 23:04:29 -0000 (GMT) From: Duncan Barclay <dmlb@dmlb.org> To: Brad Knowles <brad.knowles@skynet.be> Cc: freebsd-chat@FreeBSD.ORG, Michael C.Wu <keichii@peorth.iteration.net>, Greg Lehey <grog@lemis.com> Subject: Re: Mobile phone coverage (was: VCD (was Re: cvs commit: src/sys Message-ID: <XFMail.010122230429.dmlb@computer.my.domain> In-Reply-To: <v04220829b6914d70834a@[10.0.1.2]>
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On 22-Jan-01 Brad Knowles wrote: > At 12:35 PM +1030 2001/1/22, Greg Lehey wrote: > >> That's not the issue here. BTW, for the USA you need a three-band >> phone. That is, incidentally, the only kind of phone which will work >> just about anywhere (I'm not sure about Israel and Korea). > > Uhh, I think you need more than that. Let's count: > > AMPS/NAMPS > US TDMA (1900Mhz? 900Mhz?) > US CDMA (1900Mhz? 900Mhz?) > US GSM (1900Mhz) > European GSM (900Mhz/1800Mhz) > > To which you will be able to add W-CDMA, with the advent of the > 3G networks. Of course, this doesn't begin to address the needs for > analog coverage outside the US -- this is just a list of the > different technologies and frequencies of which I am personally > acquainted. I'd love to see this list get expanded. UMTS/3G is 1920-1980 downlink and 2110-2170 uplink. >> The real issue is competition. One large company would be able to get >> better coverage. > > Coverage is extremely expensive to build. It's much cheaper to > buy. And even then, you don't really try to dot the entire country > side with a tower in each and every square mile (maybe every 1/10th > of a square mile in cities), you just don't bother trying to put up > antennas in the less populated areas, and you live with the fact that > 98% coverage is good enough and the rest of the people can just piss > off. You also build pci and micro cellular basestations that live on light/ utility poles. Nokia, Ericsson and Lucent all do these. Nokias are called MetroCite. >>> Love love 3G+W-CDMA. >> >> And where do I get one? R+D labs! Not mine yet though :-( > Damn good question. I wanna know, too. Duncan --- ________________________________________________________________________ Duncan Barclay | God smiles upon the little children, dmlb@dmlb.org | the alcoholics, and the permanently stoned. dmlb@freebsd.org| Steven King To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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