II. FEATURES AND APPLICATION MODES OF WIMAX SYSTEM
WiMAX is a broadband wireless access metropolitan
network based on IEEE802.16, which is a new air-interface
standard aimed at microwave and millimeter wave . It uses
such three frequency band: approved 10-66GHz, sub-11GHz
and Free license sub-11GHz(mainly is 5-6GHz)[2-5]. In this
paper, we use 3.6GHz. WiMAX system can connect wireless
access point of 802.11a, can connect company and family
network to internet backbones, and can be used as a extended
wireless technology of cables and DSL (Digital Subscriber
Line) in order to implement BWA. Wiamx has many
advantages whose features can be described as follows.