antwanp
Beyond FM, Beyond AM, XM Satellite Radio
Premium
join:2002-05-14
Cedar Hill, TX
clubs: 
 ·T-Mobile US
 ·RoadRunner Cable
| GSM>CDMA 1x
This makes me happy. I was hoping to see a worldwide shift towards LTE in the future. Sorry CDMA 1x, you're a dead format... GSM won.
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The Perils of Living in 3-D: »www.antwanpayne.com |
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xenophon
join:2007-09-17 | Well actually HSPA is not GSM, it's WCDMA. |
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jtel
join:2005-06-28
Bristol, RI
| Telstra announced yesterday their HSPA update will be finished by years end. 21Mbps downloads where active now. Lord knows what kind of backhaul is necessary to maintain that with heavy traffic or what the cost will be.
I have to admit the acronyms are very confusing in these next steps of wireless evolution. |
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NOCMan
Verizon Fios User
Premium
join:2004-09-30
Flower Mound, TX | Yeah only expect to see these speeds in cities. Backhaul issues will be immense. |
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mlerner
Premium
join:2000-11-25
Nepean, ON
·Rogers Hi-Speed
 ·TekSavvy Solutions..
·Bell Sympatico
| reply to xenophon
said by xenophon  :Well actually HSPA is not GSM, it's WCDMA. Well HSPA is more like GSM than it is CDMA, the only thing it has in common with CDMA is the air interface. |
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JackityJack
@qwest.net
| reply to antwanp
said by antwanp :This makes me happy. I was hoping to see a worldwide shift towards LTE in the future. Sorry CDMA 1x, you're a dead format... GSM won. Thats interesting cause HSPA is based on the CDMA wavelength. GSM carriers may be choosing HSPA as their upgrade paths, but HSPA is NOT GSM!!!! |
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phoneboy3
@shawcable.net
| HSPA is an upgrade to GSM that in many cases only requires updated software/firmware on the backend equipment. It is NOT a forklift upgrade to GSM like it is to CDMA. Also, it IS backward compatible with GSM unlike CDMA.
Don't get confused by the fact it uses a W-CDMA air interface as others have pointed.
»hspa.gsmworld.com/ |
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en102
Canadian, eh?
join:2001-01-26
Valencia, CA
·RoadRunner Cable
·DSL EXTREME
1 edit | reply to JackityJack
CDMA 'wavelength' ?
WCDMA / HSPA is a 'CDMA' based air interface which uses 5MHz physical channels, and ties into GSM's MAP core infrastructure (same infrastructure as GSM phones)
CDMA 1x is also a CDMA based air interface, but uses 1.25MHz physical channels and ties into ANSI core (i.e. same core as AMPS and TDMA used)
CDMA EVDO is a data only (IP based) air interface which uses 1.25MHz channels and ties into an IP backend.
Basically... UMTS/WCDMA (HSPA) and GSM utilize the same 'core' and SIM cards.
CDMA2000 (CDMA 1x/EVDO) utilize a different core.
LTE is an IP only based system which 'should' be able to bridge both CDMA EVDO and UMTS/WCDMA (HSPA) and even possibly WiMAX.
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Canada = Hollywood North |
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patcat88
join:2002-04-05
Jamaica, NY
| reply to antwanp
said by antwanp :This makes me happy. I was hoping to see a worldwide shift towards LTE in the future. Sorry CDMA 1x, you're a dead format... GSM won. GSM lost and CDMA won. Qualcomm got their CDMA patents into GSM, and decided to just license patents than worry about market share, and making products, and *gasp* competing. |
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