|reply to NetAdmin1 |
said by NetAdmin1:WIMAX will have the exact same problems EVDO and GSM have. All 3 rely on oversubscribtion business models. I belive WIMAX is 18.5 mbitps per 5 mhz channel, EVDO is 3.1 (Rev A) or 2.4 (Rev 0) mbitps per 1.25 mhz channel, and HSDPA is 14 mbitps per 5 mhz channel.
WIMAX is suppose to change that, but this service is too new to know if the problems that EVDO and GSM data services suffer from under high utilization are gone.
WIMAX may have an advantage in speed and congestion over other standards since WIMAX will not be forced into the small PCS and 800 Cellular bands and have to share channels with legacy standards (GSM/EDGE/CDMA 1x). USA WIMAX bands/spectrum MIGHT be larger and/or more available than PCS/800 bands/spectrum, and thats what provides the illusion WIMAX is better. The analogy is that the car isn't any better or faster than any other car, it just has a sticker on its bumper that lets it drive on a much bigger less congested highway. If you tried to run WIMAX inside 800/PCS, you would have the exact same problems as with EVDO and HSDPA.
Yarmouth Port, MA
Thanks for the tech detail. I was looking for those numbers a while ago.
This bandwidth <scarequotes>crisis</scarequotes> isn't a failure of the oversubscription concept. It's a failure of ISPs to keep up with the current burst of video demand. We've been through this pain before when HTTP started surpassing gopher and usenet -- suddenly systems that handled mostly text were having to pass a lot of graphics.
|reply to patcat88 |
Sprint has about 100Mhz of spectrum per market, which is technically enough to provide 1Gbps to each site (when 802.16m comes along in a couple years). Sprint won't provide that kind of performance to each user, but they'll have the spectrum to provide far more shared bandwidth than 3G. They'll be way ahead of 3G and be able to compete with cable/dsl with one big advantage... truly mobile data.