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May 26, 2004

US & the 3G plans

The Wall Street Journal reports that Cingular Wireless will be testing a third-generation mobile network based on the UMTS standard, beginning in Atlanta this summer, although a rollout is not expected until 2006 or 2007. AT&T Wireless Services will offer a UMTS services in four US cities by the end of 2004. Seems like Verizon's decision to go with EV-DO and its plans to roll out the service in major metros in coming months is proving to be a catalyst for the wireless data market. Nextel, as you all know is flirting with Flarion, while Sprint is still thinking.

A few months ago I asked the question: what happens when say about 2 million subscribers opt for this Verizon service? And I got some really good answers on what are the problems with EV-DO service.

Martin said: It goes totally titsup. Because the reverse link isn't really CDMA. And it was slow to start off with. And the channel grab and release is slow. And it takes a lot of spectrum. And it scales REALLY BADLY. But it looks great in a demo to the telco execs, and the bits per hertz figures for the downlink look good, so who cares, right?

Charlie added: That is to say, the way QCOM boosted the speed on DO, is to limit the complete channel to only ONE user at a time. One step forward, 47 steps back. So as the load increases the latency dies and throughput can really drop.


Posted by yatta at 01:09 PM