les. The profiles include frequency bands of operation, the physical layer to be used, minimum performance levels, and SO on. It has also been tasked to certify compatibility and interoperability of broadband wireless products from different suppliers [1]. The IEEE 802.16-2004 (Fixed WiMAX) air interface standard was published in October 2004 while IEEE 802.16e-2005 (Mobile WiMAX) was published in December 2005. Until April 2009 there was as such no formal standard proposed for Mobile WiMAX but the IEEE 802.16-2004 [2] was amended to include the mobility aspects. The IEEE 802.16e [3] standard provides enhancements to IEEE Std 802.16-2004 to support mobility and it was co-published with 802.16-2004/Cor 1-2005 that also contains corrections for fixed operations. In May 2009, the IEEE-SA Standards Body approved the IEEE 802.16-2009 air interface standard. The IEEE 802.16-2009 [4] is a revision of IEEE Std 802.16-2004, and consolidates material from IEEE Std 802.16e-2005, IEEE 02.16-2004/Cor1-2005, IEEE 802.16f-2005, and IEEE Std 802.16g-2007, along 1 LMDS is a broadband wireless access technology outlined by IEEE 802 LAN/MAN standards committee. It commonly operates on microwave frequencies in the range of 26-29 GHz and through 31-31.3 GHz in USA. Next Generation Mobile Communications Ecosystem: Technology Management for Mobile Communications Saad Z. Asif © 2011 John Wiley & Sons, Ltd. ISBN: 978-0-470-74746-9 Next Generation Mobile Communications Ecosystem WiMAX Development Bodies IEEE 802.16 Working Group WiMAX Forum > IEEE (Institute of Electrical Electronics > It was formed to create system profiles Engineers), a non-profit organization, is the since IEEE only defined lower layers' world's leading professional association for specifications the advancement of technology > The profiles include frequency bands > IEEE 802.16 WG is a part of IEEE 802 of operation, the physical to be used, LAN/MAN Standards Committee minimum performance levels, etc > The forum main task is to certify > Define only Physical & MAC layer