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802.16 is an Institute of Electrical and Electronics Engineering ( IEEE ) standard which specifies the wirelessMAN Air Interface for wireless metropolitan area networks. Standard was completed in October 2001 and published on 8 April 2002 . 802.16 is a “ Last Mile ” technique which uses bandwidth between 10 – 66 GHz. Because of the short wavelength, line of sight is required. Standard supports point-to-multipoint topology, Frequency-division Duplex (FDD) and Time-division Duplex (TDD) in a consistent framework and full Quality Of Service (QoS). With QoS it is possible to send sound, video etc. Standard specifies 120 Mbit/s on each 25 MHz channel. 802.16a followed 802.16 standard. It was completed in November 2002 and published on 1 April 2003 . It uses bandwidth between 2 - 11 GHz and support mesh instead of only point-to-multipoint network architecture. Standard doesn't need line of sight. With mesh support subscriber stations communicate with other subscribers rather than directly with the base station. SEE ALSO EXTERNAL LINKS |
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