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pnh102
Reptiles Are Cuddly And Pretty
Premium
join:2002-05-02
Mount Airy, MD
 ·Comcast
| Re: Better for Promoting CDMA Abroad said by wifi4milez  :Apparently CDMA is actually going away in the next few years. The 4G roadmaps all include non CDMA variants as their core! Assuming all goes according to plan, Verizon will be a GSM provider sometime between 2010 and 2020. Interesting. I remember when 3G GSM services were deployed by AT&T, they were based off CDMA technologies, but they weren't directly compatible with CDMA. That is, you couldn't take a 3G CDMA device and roam on a 3G "GSM" network. I am wondering if the GSM-based 4G solution would work in the same manner.
Also, I can't picture Verizon simply throwing away its existing CDMA-based infrastructure.
»www.cdg.org/worldwide/index.asp
The above is the status of CDMA worldwide.
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Only SHATNER is Kirk. | |
| | amungus
Premium
join:2004-11-26
America
clubs:
| Re: Better for Promoting CDMA Abroad Cool link. Wondered how CDMA was doing...
I see little reason CDMA couldn't incorporate a SIM card type system. It's just a wireless standard is it not? I mean, the network can adapt to a new handset quickly enough, so there should be little technical reason for this NOT to work (eventually...).
I'm no wireless expert, but it seems like this might be an obvious idea - to be able to take a phone (say, CDMA) and use it on any network of the same type...
I don't see the sense in keeping it so locked down if it's the same exact underlying technology.
One should be able to buy any (for example, CDMA) Nokia, Motorola, whatever, and activate it on the plan of your choice.
All that marketing speak about "OUR network standards.." sounds like crap to me. It's CDMA, is it not? There are already standards by which these things work... | |
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bobjohnson
Premium
join:2007-02-03
Titusville, FL | Re: Better for Promoting CDMA Abroad Why couldnt they just make sim based cdma phones, thats what nextel did and iden is just tdma.. | |
| | | | patcat88
join:2002-04-05
Jamaica, NY
| Re: Better for Promoting CDMA Abroad They do, its called a RUIM, no North American CDMA provider uses it. Blame the cell companies, not the equipment makers, some cellphones have the slots under the batteries, or atleast traces on the PCB for a RUIM card. Having no cards means they can charge you for a phonebook transfer, and a non-geek is at their mercy. Nor can you switch phones without their approval (another fee and only their handsets can be used), plus they can control what phones go on what tiers more easily (they can still always block by ESN (CDMA)/IMSI (GSM)) (a million ways to get more $). | |
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NOCMan
Verizon Fios User
Premium
join:2004-09-30
Flower Mound, TX
| VZ has alredy announced that they will migrate with AT&T and other international carriers to LTE.
Conversions are easy. Cell towers are capable of having more than one radio. Some have 5-10 radios. Replace one radio with a LTE radio and as demand increase and CDMA sets decrease you add more LTE radios while taking away CDMA radios.
That's how the TDMA to CDMA conversions went. | |
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Jwobot
join:2002-08-14
Sterling Heights, MI | Awesome. All the phones I want to use on my Verizon service are GSM based. | |
| 
GSMUser
@myvzw.com
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LTE is not GSM. LTE is an IP-Based network infrastructure and doesn't share the same core network as current day CDMA or GSM networks.
I think people get confused because the GSM Association chose LTE as their upgrade standard of choice. People now associate LTE with GSM when it is anything but. | |
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AllCingularUser
@umusic.com | Re: Better for Promoting CDMA Abroad What part of LTE is GSM? UMTS uses a CDMA (WCDMA) air interface. GSM uses a TDMA core. Completely different regardless of what "path," any particular carrier chooses. | |
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wifi4milez
Big Russ, 1918 to 2008. Rest in Peace
join:2004-08-07
New York, NY
 ·Verizon FIOS
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| Re: Better for Promoting CDMA Abroad said by AllCingularUser :
What part of LTE is GSM? UMTS uses a CDMA (WCDMA) air interface. GSM uses a TDMA core. Completely different regardless of what "path," any particular carrier chooses.
Huh?? Do some proper research buddy. UMTS is the evolution of GSM, and is based on the standard. LTE is also the evolution of UMTS and GSM, and is likewise based on the standard. Yes, each evolution utilizes new technologies (such as W-CDMA), however that doesnt change their core design.
said by UMTS Technical Description :
UMTS, the 3G successor to GSM which utilizes the W-CDMA air interface and GSM infrastructures.
said by UMTS Technical Description :
UMTS combines the W-CDMA, TD-CDMA, or TD-SCDMA air interfaces, GSM's Mobile Application Part (MAP) core, and the GSM family of speech codecs. In the most popular cellular mobile telephone variant of UMTS, W-CDMA is currently used.
I could quote many more lines explaining this in detail, but I will let you read it yourself and get a leg up on things.
»en.wikipedia.org/wiki/Universal_···s_System
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с новым годом | |
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Howard F
@myvzw.com
| Re: Better for Promoting CDMA Abroad
All you quoted proves that UMTS is CDMA based (on the airlink - WCDMA) like the other guys said. You didn't prove that LTE is a natural evolution of GSM.
Don't confuse GSM with WCDMA and WCDMA with LTE either.
Like the other poster said. LTE is IP-based (OFDM for the downlink). What part of GSM is IP-based?
There will be no simple software upgrade from UMTS/HSDPA sites. They will require completely new hardware. There is NO guarantee that calls that originate on the old 2G GSM network or the newer WCDMA network will soft handoff to any LTE technology.
With the stock market the way it is and the way AT&T moves as slow as molasses with their technology rollouts, I don't see them really rushing to roll LTE out either. I'm sure Vodafone and Verizon will market the technology much sooner.
"Natural progression," in this case implies that the greater majority of GSM operators that are part of the "Association," mutually agreed that they'd unanimously migrate to a new standard. From a cost perspective, the move to LTE made much more sense since it required less bandwidth to operate with while allowing the various telcos to stay within budget. This was clearly a pure politics and money based decision. | |
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wifi4milez
Big Russ, 1918 to 2008. Rest in Peace
join:2004-08-07
New York, NY
·Verizon FIOS
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·BroadVoice
| Re: Better for Promoting CDMA Abroad said by Howard F :
All you quoted proves that UMTS is CDMA based (on the airlink - WCDMA) like the other guys said. You didn't prove that LTE is a natural evolution of GSM.
You missed the point as well. GSM evolved to EDGE, which then evolved to UMTS. HSPA is an extension/evolution of UMTS. LTE is the next evolution of all the prior services, again, based on the core GSM design. For your reading pleasure:
said by LTE Technical Description :
3GPP LTE (Long Term Evolution) is the name given to a project within the Third Generation Partnership Project to improve the UMTS mobile phone standard to cope with future requirements. Goals include improving efficiency, lowering costs, improving services, making use of new spectrum opportunities, and better integration with other open standards. The LTE project is not a standard, but it will result in the new evolved release 8 of the UMTS standard, including mostly or wholly extensions and modifications of the UMTS system
said by Howard F :
There will be no simple software upgrade from UMTS/HSDPA sites. They will require completely new hardware. There is NO guarantee that calls that originate on the old 2G GSM network or the newer WCDMA network will soft handoff to any LTE technology.
Again, you missed the point. UMTS wasnt a simple software upgrade from GSM/EDGE either! NEW equipment has been required at each major "jump" in technology. The same applies with LTE. This is nothing new, and has happened multiple times already. Simply because equipment upgrades are required, in no way precludes something from being evolutionary.
The full description, along with the evolutionary lineage (along the right hand side) can be found at the following link:
»en.wikipedia.org/wiki/3GPP_Long_···volution
Mobile communication standards
GSM / UMTS (3GPP) Family
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2G
GSM
GPRS
EDGE (EGPRS)
EDGE Evolution
HSCSD
3G
UMTS (3GSM)
HSPA
HSDPA
HSUPA
HSPA+
UMTS-TDD
TD-CDMA
TD-SCDMA
FOMA
Pre-4G
UMTS Revision 8
LTE
HSOPA (Super 3G)
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с новым годом | |
| | | | patcat88
join:2002-04-05
Jamaica, NY
| CDMA is a digital modulation scheme, involing vectors, walsh codes, and psudorandom numbers. Nothing more.
Qualcomm Corp, makes a product called "IS2000" also called "CDMA2000", it is an upgrade of "IS-95", also there is a product called "IS-856, aka "EVDO". These are protocols that use CDMA modulation/multiple access. CDMA is a digital modulation/encoding, nothing more. It doesn't allow for cellphone, phone calls, internet, or anything else, it only allows multiple users on 1 communication medium.
GSM family decided to use CDMA modulation since it was more efficient than TDMA used in GSM. Their product is called "WCDMA", WCDMA and CDMA2000 only share a digital mutiple access technology, nothing more.
Are you also going to say next that sim-less old ATT Wireless handsets, also called "TDMA" are the same thing as GSM handsets? | |
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