Wireless LAN
Leonhard Korowajczuk · 2011
The popularization of computers at home created the need to interconnect several devices, such as desktops, switches, laptops, printers, cable modems, and so on. WLAN (Wireless Local Area Network) became attractive as it did not require wires and gave mobility to laptops, but to be implemented it required the RF spectrum. The RF spectrum is regulated by government agencies, requiring that users obtain licenses to use it. There are two possible implementations of a WLAN (Wireless Local Area Network) foreseen in the standard: 1) IBSS (Independent Basic Service Set): 2) InfraBSS (Infrastructure Basic Service Set): All the amendments to the 802.11-1999 Standard were incorporated in the 802.11-2007 Standard. These amendments are: a, b, d, e, g, h, i and j. The medium access procedure of 802.11 is very inefficient and extensive work was done to increase the protocol efficiency, while keeping compatibility with existing systems. Controlled Vocabulary Terms IEEE 802.11n Standard; radio frequency; Wireless LAN