The IEEE 802.16 Working Group on broadband wireless access standards prepared the formal specifications for broadband wireless metropolitan area networks (WirelessMAN, the 802.16 family of standards is the basis of Mobile WiMAX).
IEEE 802.16-2004 (also called simply 802.16d) provides support for non-line of sight (NLOS) and indoor end-user terminals for fixed wireless broadband. In 2005, the standard was amended (IEEE 802.16e-2005 or 802.16e) adding support for data mobility.
IEEE 802.16e or Mobile WiMAX) improves on the modulation schemes used in the original (Fixed) WiMAX standard by introducing SOFDMA (scalable orthogonal frequency-division multiple access).
