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True 4G Future Gets Closer, Qualcomm Successfully Completes VoIP LTE To WCDMA Tests

By now, we all know and love our 4G LTE network that the various carriers are providing for us. Still even now though, LTE is not used for any voice duties, only data. Verizon specifically uses 3G or CDMA for any voice calls, but thanks to a new test by a Qualcomm chip, the MSM8960 Snapdragon S4, full LTE use is in sight.

This new chipset allows for a single radio to handle the LTE/CDMA handoff seamlessly. This means there doesn’t need to be two separate radios for data and voice. What does this mean for the consumers? Smaller phones and better battery life without the need for multiple radios. When VoLTE (voice over LTE) becomes more commercially focused these chips will be invaluable to our phones.

Via: Engadget

  • Anonymous

    Title says WCDMA, article says CDMA. There’s a big difference, so which is it?

    • Butters619

      I’m pretty sure it’s WCDMA (aka GSM) but this information is posted 1,000 times on the internet across all sorts of blogs and news sites and almost every one uses both terms :/

      Edit: Yeah it looks like it’s WCDMA. And since they have plans to show off the demo at Mobile World Congress (GSM heaven), it would seem to back that up.

      • Anonymous

        It’s a bit annoying when that happens… I’m pretty sure it’s WCDMA because that makes more sense. Since LTE is an evolution of 3GPP tech as is WCDMA, it would be logical. It should be easier to get it working with WCDMA than CDMA as well.

  • Meanwhile in Europe, voice over LTE is in use for a year or so (with automatic 3G and 2G fallback support).

    • Tony Allen

      Really? On what network have you had such a thing?

      • Lattelecom for example.

        • Tony Allen

          I can’t find any evidence of them actually using real VoLTE and if they had, it hasn’t been for over a year now, they were only testing LTE on their network at the 850Mhz spectrum in summer of 2011. So you’re wrong.

          You’re entirely missing the point of this article though. They can’t have been doing what this new chipset is going to do. Since without the technology the network isn’t capable.

          • The problem here is that, how do I put it, voice over LTE is essentially data over LTE.

            In GSM 3G networks, there’s no “Voice over UMTS”, there’s just UMTS data, divided into subchannels where one is used for voice (transmitted as data), and another, with less priority, for data.

            You don’t need the transceiver itself to handle subchannels, too.

          • (Although I’m not sure how exactly they did it on Lattelecom; there’s a possibility VoIP was in use instead of pure channel division method.)

  • Anonymous

    I thought this was exclusively a handoff from LTE to W-CDMA…. and not to cdma? I believe this is GSMs answer to garbage ehrpd….

    • I’m also puzzled by the title, considering WCDMA is GSM 3G.

  • tjmonkey15

    Now we just need Verizon to beef up their 4G network enough to make this a reality.  Personally, I wouldn’t want my voice calls to rely on that network as it currently stands.  

    • @EMAW_29

      Yeah, because they’re totally done deploying it and are the farthest behind…

      • he means with the outages

  • Anonymous

    What will be the first phones to use these? The GSIII? The iPhone? Or something else?

    • Anonymous

      probably something else. It’ll take a while for the network to become large enough and stable enough to use this over CDMA. The GSIII and the iPhone will be out way before this becomes a reality. Also, only Qualcomm’s S4 chipset has been shown to do this so far and Samsung/Apple like to use their own chipsets for their phones.

      • Josh Groff

         Two of the GS2’s have snapdragon S3’s? I know t-mobile’s does

    • Anonymous

      Need a network that supports this before any phones come out. No networks in the US use VoIP which is necessary for a pure IP based network to handle voice.

      • Josh Groff

         T-mobile is working on implementing VoIP, they already have WiFi calling (which is why I locked in for another 2 years, wireless N router = amazing VoIP)

    • Tim242

      The LG Revolution is the only phone thus far to support VoLTE. Verizon uses it in testing.