WiMAX, is an acronym of Worldwide Interoperability for Microwave Access, is a telecommunications technology provides wireless data over long distance. It is based on the IEEE 802.16 standard, also called WirelessMAN. According to WiMAX forum WiMAX is a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL.WiBro (Wireless Broadband) is a wireless broadband Internet technology being developed by the South Korean telecoms industry. WiBro is the South Korean service name for IEEE 802.16e (mobile WiMAX) international standard. Actually, WiBro was developed to overcome the data rate limitation of mobile phones (for example CDMA 1x) and to add mobility to broadband Internet access (e.g. ADSL or Wireless LAN). WiBro adapts TDD for duplexing, OFDMA for multiple access and 8.75 MHz as a channel bandwidth. WiBro base stations offer an aggregate data throughput of 30 to 50 Mbit/s and cover a radius of 1-5 km allowing for the use of portable internet usage. It provides mobility for moving devices up to 120 km/h.
WiBro provides mobility for moving devices up to 120 km/h compared to WLAN having mobility up to walking speed and Mobile Phone having mobility up to 250 km/h. It also offers QoS. The inclusion of QoS allows for WiBro to stream video content and other loss-sensitive data in a reliable manner.