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CDMA for Domestic, GSM for International?

Discussion in 'GENERAL Wireless Discussion' started by ajulius, Jul 21, 2002.

  1. ajulius

    ajulius New Member

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    As of now, it appears as though CDMA carriers are limited for international roaming usage, while GSM players have extensive roaming. In total markets with CDMA vs GSM, GSM is available in more areas across the world. Do countries with GSM and no current CDMA deployments have plans to add CDMA to their markets, and eventually have a global roaming usage on par with GSM down the road? Or will GSM be delegated to the global market and CDMA be used domestically? If such becomes the case, then CDMA will be cheaper based on price for domestic usage, while GSM carriers will focus on global roaming agreements. As of now, the GSM carriers are not more expensive than CDMA carriers, but CDMA has better nationwide domestic penetration in the USA .
     
  2. aiwapro

    aiwapro Silver Senior Member
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    CDMA is only domestic in the U.S. and barely used in any other places around the world. GSM is a world standard. It is used everywhere, and is beginning to expandmore in the U.S. To answer your question, no, countries with GSM have no plans to launch CDMA in their country.
     
  3. WirelessBeachBum

    WirelessBeachBum Soylent Green is People
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    Sorry CDMA is here and abroad, in fact three out four 3G implementations schemes are CDMA based. Initially the plan was to have one standard 3G service that would allow interoperability between countries and carriers that plan was:

    IMT-2000 International Mobile Telecommunications for the year 2000 (or another possible meaning is 2000 kbps, especially since the year 2000 has passed), IMT-2000 is the vision for a single global standard for wireless networks. IMT-2000 is an ITU initiative, (If you don't know what the ITU is it is probably the single most important telecommunications standards organization in the world, ironically they don't set standards only recommendations, but they are generally listened to because most countries/companies understand the need for interoperability across borders.) IMT-2000 is a concept for 3G---Specifications Include 128kbps for high mobility and ISDN applications
    384kbps for pedestrian speed and full-motion compressed video and 2 Mbps for fixed e-1/t-1 access and wireless LANs.

    The concept of a single global standard fell apart in October 1999, when representatives from the various countries agreed to adopt "federal standards" under the IMT-2000 umbrella.

    Two of these three modes are based on CDMA and one on TDMA.

    cdmaOne, also known as TIA IS-95a, was the first CDMA-based 3G approach to be introduced, and is popular with CDMA-based cellular operators in North America and Asia. (cdmaOne is a trademarked name of the CDMA development Group (CDG), a group of companies joined together to promote CDMA technology, technically CDMAOne is just a brand name)

    Cdma2000 3xmc, the high-speed version operating at 2Mbps, was developed by qualcomm and has been approved by the ITU. The migration path is to roll out CDMA2000 1xrtt then progress to the faster version)

    Edge (Enhanced Data Service for GSM Evolution) is the TDMA variant of IMT-2000. GPRS (General Packet Radio Service), an interim step towards Edge, is the choice of cellular operators with networks based on GSM (GPRS is the equivelent of CDMA 1xrtt)

    Another alternative to GSM carriers is based on CDMA- wcdma ----Please Note: wCDMA is being developed for Europe----

    WCDMA- wideband CDMA, wCDMA is another name for UMTS (Universal Mobile Telecommunications System), which is also referred to as 3GPP. As the name implies UMTS will be based on CDMA technology, but will allow a migration path for GSM handsets, such that wCDMA should accommodate dual mode wCDMA and GSM handsets.

    So out of the four primary paths to 3G three are based on CDMA....
     
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  4. Guest

    Guest Guest

    So. in Europe, for instance where wCDMA is being developed, would current tri-band GSM phones be able to operate on wCDMA networks? Or would new handsets have to be developed?
     
  5. IdiOTeQnoLogY

    IdiOTeQnoLogY Bronze Senior Member
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    new handsets have and are being developed.
     
  6. CaliphoniaBoy

    CaliphoniaBoy Senior Member
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    current triband handsets will continue working there as they won't switch off their current (very extensive) GSM network for the next (5+) years...

    they will slowly start overlaying wCDMA on their GSM networks in the metropolitan areas but will keep GSM up and running

    C.
     

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