TheIEEE802.16standard,commonlyknownasWiMAX,isthelatesttechnologythathaspromisedtoofferbroadbandwirelessaccessoverlongdistance.Since2001WiMAXhasevolvedfrom802.16to802.16dforfixedwirelessaccess,andtothenewIEEE802.16estandardwithmobilitysupport.Inthisarticleweprovideanoverviewofthe