WiMAX is based on OFDM and OFDMA technology, and international standards are adopted for this technology. WiMAX has become a leading 4G technology and could reshuffle the structure of the global telecommunications equipment industry. At present, WiMAX technology is still in initial development stages, and manufacturers have a chance to reposition themselves in the next-generation wireless mobile broadband market. Therefore, mobile telecommunication and network communications equipment manufacturers like Alcatel-Lucent, Motorola, NSN, Nortel, NEC are all engaged in mobile WiMAX competition.