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Clearwire can resell the Expedience PC Card from Motorola: The card will offer 1.5 Mbps downstream and 128 Kbps upstream according to sources. Pricing hasn’t yet been set, but it’s likely that Clearwire will establish home areas and charge a monthly roaming fee to access out-of-metro-area services. The card is not WiMax, and you’ll note the press release talks about “WiMax class” products and networks. It uses the NextNet Expedience technology, a proprietary standard that runs Clearwire’s current network, and which was part of what Clearwire spun off to Motorola with the NextNet sale.
The WiMax Forum has certified products that use Frequency Division Duplexing (FDD) in the 3.5 GHz band: You’ll have to get used to very fine distinctions with WiMax, because there are ultimately many frequencies and many encoding methods that could be certified, although a handful will be most common. The 3.5 GHz band is not yet cleared for use in the U.S., but is in wide availability in Europe where it’s considered one of the main early bands for broadband wireless. FDD uses distinct frequencies for uplink and downlink traffic; TDD (Time DD) uses time slots but shares frequencies.
These certifications and those announced in January are for a set of interoperable parameters for base stations and subscriber units that ensure those units both meet the 802.16-2004 spec as set up for testing by the forum, and that they interoperate in expected ways. Quality of service isn’t part of these parameters at the moment, so companies aren’t required to show compliance there.
Yesterday’s announcement brings official first-wave certification to Airspan (MacroMax base station, EasyST subscriber station), Axxcelera (ExcelMax base station), Sequans (SQN1010-RD subscriber station), Siemens (WayMAX@vantage base station, subscriber station), Wavesat (MiniMax subscriber station).