Wireless MAN
Wireless metropolitan network offers broadband network access via exterior antennas. Antennas communicate with base stations which are connected to core network. This is a good alternative to fixed line networks. It is fast to build and not so expensive.
802.16 is a 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 wavelenght, 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 speficies 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 bandwith 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 subcribers rather than directly with the base station.
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Referenced By
WLAN | Wireless LAN
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