Date Added: Apr 2010
The IEEE 802.16e-2005 amendment to the IEEE Std 802.16-2004 Air Interface Standard which added Scalable-Orthogonal Frequency Division Multiple Access (S-OFDMA) and many other features for support of mobility has provided the basis for WiMAX System Release 1. Further specification enhancements for Release 1 were provided with IEEE Std 802.16e-2009. The first WiMAX System Release 1 deployments took place in 2006. Estimates by the WiMAX Forum indicate that as of the end of 2009, WiMAX service providers have covered more than 600 million people with over 500 deployments in over 140 telecommunications markets worldwide.