<P> As of October 2010, the WiMAX Forum claimed over 592 WiMAX (fixed and mobile) networks deployed in over 148 countries, covering over 621 million subscribers . By February 2011, the WiMAX Forum cited coverage of over 823 million people, and estimate over 1 billion subscribers by the end of the year . </P> <P> South Korea launched a WiMAX network in the second quarter of 2006 . By the end of 2008 there were 350,000 WiMAX subscribers in Korea . </P> <P> Worldwide, by early 2010 WiMAX seemed to be ramping quickly relative to other available technologies, though access in North America lagged . Yota, the largest WiMAX network operator in the world in 4Q 2009, announced in May 2010 that it will move new network deployments to LTE and, subsequently, change its existing networks as well . </P> <P> A study published in September 2010 by Blycroft Publishing estimated 800 management contracts from 364 WiMAX operations worldwide offering active services (launched or still trading as opposed to just licensed and still to launch). </P>

Which of the following multiple access technique is used in wi-max technology