WiMAX Standards and Interoperability

The mobile WiMAX standard, IEEE* 802.16e, is a single, worldwide standard that will cover fixed, portable and mobile deployments. Designed to facilitate economies of scale, lower network implementation costs, provide interoperability, while enabling device compatibility, WiMAX is the next open standards-based step in our wireless evolution.
Increasing global leadership and collaboration
Formed to promote and certify compatibility and interoperability of broadband wireless products, the WiMAX Forum* was established in June, 2001 as an industry-led, not-for-profit corporation. The Forum has over 500 members in almost 60 countries. The diverse membership includes many of the world's largest mobile and fixed-line operators as well as leading telecom manufacturers, in collaboration with component suppliers, research labs, test equipment vendors, and certification labs. This vibrant ecosystem is driving innovation to help bring costs down quickly.
To support the hundreds of 802.16e-compliant products expected to be submitted in 2008, the forum has five certification labs operating in China, Korea, Spain, Taiwan and U.S. with plans for additional labs in Brazil, India, Japan, and a second one in Taiwan.
Industry collaboration
With more than 250 802.16e-based commercial trials and deployments globally—from developing to mature markets—providers are building the business relationships and framework that will eventually permit seamless global roaming and the possibility of practically any data-intensive application delivered

taken from
http://www.intel.com/technology/wimax/standards.htm?iid=tech_wimax_products+body_standards