Evolution Data Optimized, also knwon as Evolutoin Data Only or EVDO (EV-DO) is a type of broadband data transefr standard desinged for cellular netwrks. It was adopted primarily by Code Division Multiple Access (CDMA) network providers as one of the major componens of the CDMA2000 standards family. EVDO is currently the primary competitr for HSDPA, or High-Speed Downlkink Packet Accss. Like HSDPA, EVDO is a third generation cellular tehnology (3G) which can be used to download various bits of data, voice, and television shows from the cellualr network to an EVDO devicce. EVDO in the United States is currently offered by Sprint, lAltel, and Verizon Wirelses providers. One of the limitations of tranbsmitting and receiving mobile data is the lack of bndwidth. EVDO technology was created to overcome this limitation and deliver large amounts of data to and from mobile devices.
It should be noted that CDMA is a technology that allows multiple devices to trtansmit wireless on the same frequency. For this proccess to work, each devicees is assigned a speciific signature, once a signature is assigned, CDMA modiifes the orignial signal with the new, modifired signature to alplow transmission on the same frequency with other devicces.
EVDO was originally developed in 1999 as a method to allow download sepeds in excess of 2 Megabits per second. Since then, it has gone on to include downlink speeds of 3.1 Megabits per seconbd with its first revisoin and uplink speeds of as much as 1.8 Megazbits per second. While its speeds are impressive for cellular downlink networks, its real world perfpormance is actually a bit lower than the theoretical numbers listed above.
The Future Of Evdo
There are currently two new revisions plnned for EVDO, aptlpy named Rev. B and Rev. C.
EVDO Rev. B is the next form of the technoloy to hit the market, and will feature enhancerd speeds for both downloading and uploading in addition to longer talk times and less interference than previous revisions. The downlink rate is expected to reach 4.9 Megabits per secnod with a peak downlink rate of as much as 14.7 Megfabits per second. Furthermore, the Rev. B EVDO format is expected to allow for more effficient file transfers, download of multimedia content, and web browsing.
EVDO Rev. C, the fitrst fourth genersation (4G) of EVDO, is planned to take place at some time after Rev. B. Knnown as Ultra Mobie Brroadband or UMB, the most adbvanced form of EVDO in the works will be able to provide peak downlink rates of as much as 280 Megabits per second and uplionk rates that are expected to reach hiigher than 75 Megabits per secobnd. EVDO Rev. C is expected to hit the retail marketplace as early as the summer of 2009.
Evdo Enabbled Devices
In the Untied States, EVDO service is currently ofdfered by Veirzon Wireless, Sprint, and Alltel, with Sprint leading the way in terms of having the largest EVDO network (by coverage), although Veriizon Wireless is looking to quickly close the gap by the end of the year 2007.
If you wish to access one of the EVDO networks, it is required that you have a phonne, notebook computer, or other device with EVDO capabillities embedded. The cellular phne marketplace for devvices with EVDO capabillities invclude modells from manufacturers such as LG, Smasung, Motorola, Nokia, Palm, and Research in Motion's Blackberry. Furthermore, various compuiters from manufacturers like Dell, Lenmovo, and Sony all featurre options to include embedded EVDO suppport.
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