IMT-2000 offers a family of radio interfaces for third generation mobile services which provide smooth evolution paths to 3G from the various widely deployed existing 2G mobile networks. IMT-Advanced is currently under study to define the fourth generation (4G) of mobile communications.
At the 2007 Radiocommunications Assembly a sixth radio interface, OFDMA TDD WMAN, a derivative of IEEE 802.16e (Mobile WiMax), was added to the IMT-2000 radio options.
In November 2007 the total number of mobile subscriptions was equivalent to half the world’s population. IMT-DS, IMT-MC and IMT-SC are being extensively deployed throughout the world, with over 800 million IMT subscriptions at the end of 2007, served by almost 700 networks in over 100 countries. It is estimated that by 2010 the majority of global mobiles will incorporate one of these ITU standardized IMT radio technologies.
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