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With UMB cell phones at 300 Mbit



With UMB cell phones at 300 Mbit


Rome – CDMA2000 1xEV-DO Revision C could be too long and convoluted to identify the broadband technology capable of offering downstream with a peak speed of 280 Mbps on the move. The developers have thus thought of something more catchy: UMB, acronym for Ultra Mobile Broadband.

However, the application of this technology is still far away, originating from the EVDO (EVolution Data Optimized) system, whose top speed is similar to those of our own entry-level ADSL (over 700 kbps). The development of the UMB standard will not be completed before next year and the possible commercial availability could arrive by 2009.

The CDMA Development Group (CDG), the technology development group (which includes many telcos) explains that UMB will have a data transfer rate that is absolutely superior to any technology available today. The first version (CDMA2000 1xEV-DO Revision A), now supported in the States by operators such as Sprint Nextel and Verizon, can reach 450-800Kbps in static conditions (not in mobility).

From the second version (CDMA2000 1xEV-DO Revision B), which will see the commercial light in 2008, much more is already expected: a peak of 46.5 Mbps. From the third generation, UMB precisely, what is expected today it’s unlikely. And this, according to the CDG, is possible thanks to very short latency times and a more efficient use of frequencies.

“These improvement factors – explain the developers – will lead cell phones to greater battery efficiency, with longer autonomy of use”. Finally, UMBs will not present the unpleasant drawback of signal degradation in the areas farthest from the transmission antennas.

DB