802.16 WiMax Wireless Broadband on the Horizon

securitas writes "Products using the emerging IEEE 802.16 WiMax wireless broadband standard should be available early in 2005. WiMax's hundreds of megabits per second bandwidth looks promising to many vendors and service providers who met in San Jose at last week's Wireless Communications Association (WCA) International Technical Symposium & Business Expo. The point-to-multipoint 802.16d standard, with a 50-kilometre range, is expected to be complete by February, ratified in March and deployed in the first quarter of 2005." (Read on for more.)

"The IEEE 802.16e spec, which will support mobile applications, is expected to be complete by early 2005. Nextel, Sprint and BellSouth are all interested in the technology to deploy services like streaming video and TV, wireless phones, and high-speed Internet service in unserved, low-density areas near high-density ones. Mobile operators in developing countries like Brazil's NEOTEC group have already successfully tested an 802.16 wireless broadband deployment. Intel communications group executive VP and GM, Sean Maloney, is banking on it. From the article: 'We believe that WiMax can happen, and be widely deployed, and be a big deal in the next three years the same way Wi-Fi has been a big deal the last two years.' Mirrors at Network World Fusion, Techworld and PCWorld. What happens when techies start to build their own 802.16x WiMax VoIP systems?"

Comments

Re:This is promising.

[CaptainAlbert]

Usually, higher bandwith means higher frequency. Higher frequemcy means less range, since the waves is easilier interupted by obstacles, like trees. and so on. Someone care to explain this to me?

Without getting too technical - you're right, sort of. The article is rather muddled; it mentions the frequencies in question (2.5GHz region, which is microwave), and then has some confused sentence about "point-to-multipoint meaning no line-of-sight is necessary". Well, that's nonsense. Microwave propogation is almost exclusively line-of-sight. Without LOS, signal strength drops off dramatically.

However, if you use spread-spectrum techniques (which 802.16 does), you can overcome a lot of these problems. Basically, the characteristics of a wideband SS signal are such that multiple reflections (even weak ones) can be separately received and combined. This is a big gain over narrowband radio, where reflections cause inter-symbol interference which causes the signal to deteriorate.

Another factor that may be more significant - this standard seems mainly to be for delivering broadband to fixed installations (not mobile stations). Well that's an easier job by orders of magnitude: you only have to site the antennas correctly once, and you never have to worry about them moving around.

In conclusion: it's quite different from the radio technology we're most used to, and there's a little thing called progress to factor in too! :)

Hope that helps.