EV-DO lights up mobile data

The light at the end of the tunnel to 3G mobile data services in the U.S. is getting brighter as technology that builds on Code Division Multiple Access networks comes into view.

Although the rival Universal Mobile Telecommunications System (UMTS) technology is making headway, CDMA2000-1x Evolution-Data Only (EV-DO) looks likely to be the most widely deployed form of 3G in the U.S. by year-end. That might still be too early for enterprise customers to start rejoicing and writing checks, but it's the beginning of good news for users, especially mobile professionals, analysts say.

Though they are cagey about details, both major U.S. CDMA carriers are heading toward national rollouts. Verizon Wireless Inc. already offers a commercial EV-DO service in the Las Vegas, San Diego and Washington, D.C., metropolitan areas and plans to have it available to one-third of its customers by year-end, according to spokesman Jeffrey Nelson. Verizon Wireless sells EV-DO data cards for notebook PCs. Sprint plans to begin rolling out the technology by year-end and offering it nationwide by late 2005 or early 2006.

EV-DO builds on CDMA2000-1x, the data technology that Verizon and Sprint Corp. currently offer nationally, which on average delivers speed in the same range as a 56K bit/sec dial-up Internet connection. By adding EV-DO modules and software to existing base stations, mobile operators can boost performance to between 300K and 500K bit/sec, with peak throughput of more than 2M bit/sec, according to the service providers. That's enough to run business applications and e-mail at a reasonable speed, analysts say.

As EV-DO rolls out in more cities, it will open up new on-the-road capabilities for enterprise employees, according to Lisa Pierce, an analyst at Forrester Research Inc.

"Trying to do remote e-mail at 56K is not a fun experience," Pierce says. "Siebel doesn't really work at all at 56K."

For businesses, EV-DO should mean easier connectivity and lower costs, Pierce says. Employees who today buy the broadband connections in hotel rooms should be able to get adequate speed on the same EV-DO account they use in their home cities.

EV-DO won't be the only option for fast access on the road. U.S. operators with networks are moving toward national deployments of UMTS, which will offer speeds of 220K to 320K bit/sec with bursts up to 384K bit/sec.

Last month, AT&T Wireless Services Inc. launched UMTS in four cities, with two more set to get the service by year-end. UMTS customers also can buy handsets that use the service, something not available for EV-DO.

Cingular Wireless, which is set to complete its acquisition of AT&T Wireless by year-end, also is seeking proposals for UMTS equipment. Nextel, which uses a third technology called iDEN, plans to increase its data performance to between 40K and 80K bit/sec early next year through a technology called WiDEN. It's also testing a wide-area mobile broadband system called Flash OFDM - Fast Low-latency Access with Seamless Handoff Orthogonal Frequency Division Multiplexing - that could deliver 3M bit/sec.

For 3G in the U.S., broad coverage is key and business data applications on notebooks are what will drive adoption, at least initially, analysts say. For any such service to work for the average corporation, it will have to be offered in at least the 50 largest metropolitan areas in the U.S. so users can count on getting access when they travel, according to Forrester's Pierce.