Abstract- IEEE 802.16/Worldwide Interoperability for
Microwave Access (WiMAX) technology is a very promising
successor to the current wireless technologies like 3G, IEEE
802.11/WiFi. WiMAX incorporates a number of advanced
techniques which make it stand apart from the current
technologies. WiMAX has evolved quite a lot from the 802.16
standard which was approved in December, 2001. It now has
different modes of operations and offers mobility support
along with robust security measures. For this to be
implemented fully, it has to overcome quite a number of
challenges.