| By samc on Cellular Technology Verizon is testing EVDO revision A, the next incarnation of the technology, which promises speeds of around 3.1Mbps/1.8Mbps. Trials are planned for 2006. With the improved upstream speed, Verizon hope to offer VoIP and multimedia services over the EV-DO network. Right now it's Data Only. Lucent's CDMA2000 1xEV-DO with Revision A will be commercially available in 2006, and claims faster, more flexible cellular networks that can handle both voice and data. Sprint also made a committment to EV-DO, backing out of it's public stand for EV-DV (Data & Voice) after it realized that EV-DO revision A would be available sooner and provide integrated voice and data cheaper. According to WikiPedia, the initial design of 1xEV-DO was developed by Qualcomm and Lucent in 1999 to meet IMT-2000 requirements for greater than 2 Mbit/s downlink for stationary communications. Initially, the standard was called High Data Rate, and renamed to 1xEV-DO, Rev. 0 after it was ratified by the ITU. When deployed with a voice network, 1xEV-DO requires a separate radio channel of approximately 1.25 MHz. The successor, 1xEV-DO Rev A, is a software upgrade. It offers fast packet establishment on both forward and reverse link, along with air interface enhancements that reduce latency and improve data rates. Meanwhile, T-Mobile International will work with Nokia to deploy high-speed HSDPA 3G service in German, the Netherlands and the United Kingdom, the companies announced Wednesday. HSDPA is an add-on to UMTS, which uses 5 Mhz channels and is deployed by GSM cellular operators. HSDPA boosts typical cellular data speeds to more than 1 Mbps with theoretical and burst speeds many times that level. In the U.S., Cingular has said it will deploy HSDPA in the 2007 timeframe. Nokia said that T-Mobile will first deploy HSDPA in Germany in 2006 and will deploy the technology in the Netherlands and the United Kingdom afterward. While T-Mobile may be advancing HSDPA in Europe, T-Mobile USA, has not divulged any plans for 3G deployment in the United States. If Qualcomm wants any U.S. operator to adopt it's newly aquired Flarion system, it better get crackin' -- and T-Mobile might be a good candidate. Flarion's Flash-OFDM modulation scheme is said to support an average data rate of around 1.5 Mbit/s on a standard, PCS-sized cell site, using only 1.25 MHz of spectrum. That's more bandwidth-efficient than standard cellular networks. Cingular has committed to HSDPA while Sprint and Verizon are going with EV-DO. Sprint and Motorola will team with WiMax. That pretty much narrows the field. Related DailyWireless stories include; Qualcomm Buys Flarion, T-Mobile's HSDPA Move, CDMA vs OFDM, Sprint Rolls Out EV-DO, 3G: HSDPA or Not?, HSDPA Tests, Sprint Commits to EV-DO and Cellular At The Races. | 
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