It's actually NOT a lot of power on the AP side. It is the technology and the air interface. Most CDMA technologies have very low threshold to make a good link. I remember designing these networks and seeing great performance with signals as low as -107dBm. In fact the whole goal with CDMA based technologies is to keep everyone transmitting at the lowest power possible. The more power a single user has to put out, the more power everyone has to put to out just to "be heard". With CDMA, everything is based on the noise floor and the higher that floor becomes, the worse the system performs. That is why you don't want a user 5 miles away maintaining a link to a tower (in a typical urban or suburban morphology). His phone ramps up to maintain the link making the noise floor higher, the sector ramps up, then everyone else close in starts "shouting" just to get their code heard above the noise. Pretty soon, the whole sector becomes unstable and everyone drops. CDMA technologies also have the luxury of the rake receiver which essentially correlates received signals from several sectors at once to maintain communication with a device. All of this makes for a far superior technology than we have access to, and you have to have clean spectrum for this all to work so well...something we don't have.
Cameron On Tue, Apr 5, 2011 at 7:54 AM, St. Louis Broadband <li...@stlbroadband.com>wrote: > Yes, I have to agree that mobile has come a long way, since I was carrying > that big bag phone around. > > That has to be a lot of power on the ap side. > > ~V~ > > -----Original Message----- > From: Charles Wu [mailto:c...@cticonnect.com] > Sent: Tuesday, April 05, 2011 6:37 AM > To: li...@stlbroadband.com; WISPA General List > Subject: RE: [WISPA] Verizon 4G LTE - WOW - update > > It's generally known that the 20 Mb "burst" given by cable companies is > throttled to sustained download speeds in the 1-3 Mb range > > That said, the point I'm trying to make is that the technology has come so > far for mobile cellular data that we are now "unconsciously" comparing it > side-by-side to fixed terrestrial broadband technologies (think of it this > way, how many WISPs can deliver "up-to" speeds of 8-10 Mb to a low power > handset in the middle of a concrete building 3+ miles away from a tower) > > -Charles > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of St. Louis Broadband > Sent: Monday, April 04, 2011 9:33 PM > To: 'WISPA General List' > Subject: Re: [WISPA] Verizon 4G LTE - WOW - update > > I just checked my Charter via Ookla and it said I was getting 20 Mbps down > and 1 Mbps up, horse pucky. > I only get that in speedtests and never when I have to upload or download a > big file via FTP or whatever. > It generally gets throttled to dial up speeds or worse. > > ~V~ > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Charles Wu > Sent: Monday, April 04, 2011 9:21 PM > To: WISPA General List > Subject: Re: [WISPA] Verizon 4G LTE - WOW - update > > Sitting in my living room at 8 pm....3 bars, laptop connected to wireless > router on phone > > http://www.speedtest.net/result/1236758959.png > > -----Original Message----- > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > Behalf Of Tom DeReggi > Sent: Monday, April 04, 2011 6:39 PM > To: WISPA General List > Subject: Re: [WISPA] Verizon 4G LTE - WOW > > Yeah, its nice when a product is brand new, and you get the whole sector > all > > to yourself. > > I guess, its amazing that you are getting the speed to a handset, without > the big antenna outside. > > Tom DeReggi > RapidDSL & Wireless, Inc > IntAirNet- Fixed Wireless Broadband > > > ----- Original Message ----- > From: "Charles Wu" <c...@cticonnect.com> > To: <paolo.difrance...@level7.it>; "WISPA GeneralList" <wireless@wispa.org > > > Sent: Sunday, April 03, 2011 8:31 PM > Subject: Re: [WISPA] Verizon 4G LTE - WOW > > > > It is my understanding that Verizon is deploying an FDD version of LTE > > > > -----Original Message----- > > From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On > > Behalf Of Paolo Di Francesco > > Sent: Sunday, April 03, 2011 11:09 AM > > To: WISPA General List > > Subject: Re: [WISPA] Verizon 4G LTE - WOW > > > > most of the test are "half duplex" tests. In few words, they do one > > direction, then the other direction (e.g. first the customer download, > > then the customer upload). > > > > Suppose you have a 10Mb half duplex: the test will tell you that you > > have 10Mb in one direction and 10Mb in the other direction. Then you use > > the connection in 10Mb full duplex and you will discover the story is > > totally different ;) > > > > Also, yes it's interesting to see what is happening on the network > > interface when the test is running... > > > >> Do a real test and report back, like FTP. Ookla & Speedtest.net test are > >> bogus 99.9% percent of the time because it's based on screwy test > >> algorithms. > >> > >> On 04/01/2011 11:05 PM, Charles Wu wrote: > >>> > >>> Just got my HTC Thunderbolt, and Ookla tested 20 Mb down, 24 Mb up at > >>> Speedtest.Net to my handset > >>> > >>> > >>> > >>> -Charles > >>> > >>> > >>> > >>> > >>> > > ---------------------------------------------------------------------------- > ---- > >>> WISPA Wants You! Join today! > >>> http://signup.wispa.org/ > >>> > > ---------------------------------------------------------------------------- > ---- > >>> > >>> WISPA Wireless List: wireless@wispa.org > >>> > >>> Subscribe/Unsubscribe: > >>> http://lists.wispa.org/mailman/listinfo/wireless > >>> > >>> Archives: http://lists.wispa.org/pipermail/wireless/ > >> > >> > >> > >> > >> > >> > > ---------------------------------------------------------------------------- > ---- > >> WISPA Wants You! 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