Much like EVDO, WiMAX (Worldwide Interoperability for Microwave Access) is an alternative to internet services like dial-up, DSL, cable, and satellite. It works somewhat similarly to EVDO, in that it provides broadband access to customers wirelessly via "base stations" (towers). Since it doesn't rely on cables or phone lines to deliver its signals - it uses microwave links - deploying WiMAX to a community can be done in a matter of days. This also makes it much more cost effective to create the broadband networks.
WiMAX will give consumers the ability to access the internet with 4G broadband speeds via a WiMAX device anywhere within the provider's service area. Just like EVDO, WiMAX users will need to use a modem to connect. Options include USB dongles, ExpressCards, standard PCMCIA format cards, and WiMAX-embedded laptops. It will also be available on PDA's and handsets.
In addition to the portability, the speed of 4G broadband service is part of what makes it so special. To compare, EVDO Rev A currently tops out at about 1.4 megabits/second in optimal conditions and has much slower upload speeds than download; WiMAX will reportedly be able to handle speeds up to 70megabits/second in ideal conditions, with a realistic average speed of about 10megabits/second.
Unlike WiFi, WiMAX has a large range, up to 30 miles from the base station (WiFI's range is about 100ft), and unlike 3G technology, it does not require a direct line of sight between the source and the endpoint. Additionally, each base station is capable of providing up to 1,000 homes/businesses with wireless broadband service at one time. There is also the option of using a "fixed-line" system, meaning that instead of accessing the WiMAX network wirelessly (like EVDO), a fixed antenna dish on the home or office points straight at the WiMAX tower and operates at higher frequencies, which decreases interference. This direct line-of-sight setup would provide a more stable connection, but obviously wouldn't offer the benefit of portability.
Several providers around the world are in the process of researching and deploying WiMAX networks, including Sprint and Altius in the US. Pakistan and Asia currently boast the most widespread operating WiMAX networks, but coverage to the US is expanding. Clearwire, which recently merged with Sprint's WiMAX division, has branded their WiMAX service as "Clear" and it is currently available in Portland; Sprint's WiMAX product, XOHM, is currently being re-branded as Clear and is available in Baltimore, Dallas, Chicago, and DC.
As WiMAX becomes available in the US, 4Ginfo.com will be selling both service and products, including modems, antennas, and routers.
Key Details:
- Standard: IEEE 802.16 (also called WirelessMAN)
- Promised speeds: up to 70mbit/s in ideal conditions - realistically more like 10mbit/s
- Line-of-sight not needed between user and base station
- Frequency bands: -2 to 11 GHz and 10 to 66 GHz (licensed and unlicensed bands)
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