WTF is... 4G
Posted: Fri Jun 03, 2011 2:53 pm
The Reg
This was one of the few concise articles I have found on this. I was really hoping that LTE would get us to 4G speeds and unify cell coverage around the world. It sounds like LTE Adv will do this. It does no one any good to have competing standards like this (where some are definitely inferior to others) and it will force even more spectrum allocation. I think that the biggest thing that is restricting phones right now is that actual lines going to the cell stations anyway. At least (real) 4G will get us to converge on the land network side of things.The great thing about standards, as some wit once said, is that there are so many to choose from. Mobile phones are afflicted worse than most technology – a multiplicity of standards, nested within one another like a messy set of Russian dolls filled with alphabet soup.
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Existing mobile networks have two, parallel infrastructures: one, circuit-switched, for voice calls, and a separate, packet-switched layer for data traffic. 4G will be different: a pure packet-switched TCP/IP network, running everything over IPv6. Voice becomes VoIP.
By the time the ITU set its specification, two competing systems were already under development. A group called 3GPP (Third-Generation Partnership Project) developed LTE (Long Term Evolution), a successor to UMTS. Meanwhile, the totally separate 3GPP2 was working on UMB (Ultra Mobile Broadband), an upgrade to Qualcomm's CDMA2000.
Fortunately, in late 2008, Qualcomm ended work on UMB and switched its efforts to LTE. Since Qualcomm was its main supporter, UMB is now effectively dead.
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Many of the current generation of 4G-branded phones in the US are not actually 4G, whatever their names may suggest. Some, such as HTC's Evo 4G, are actually CDMA2000 3G phones with an additional WiMAX transceiver. Others, such as Samsung's Droid Charge and HTC's ThunderBolt, are LTE devices.
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