ADAPTIX, developer of orthogonal frequency division multiple access (OFDMA) technology, has been granted eight patents by the governing patent agencies in Japan, Australia, Hong Kong and South Korea. The company already has an IP portfolio focused on OFDMA and related next-generation wireless technology patents in the U.S.
The Japanese, Australian and Hong Kong patents (2002-535271, 2002211628, 4105278.8) describe, among other features, a Medium Access Control (MAC) layer controlling OFDMA-based cellular networks. The Korean patents (2003-7005079, 2003-7007961, 2003-7007963, 2003-7007962, 2006-7020261) describe, among other features, both MAC over OFDMA and assignment of subcarriers and subcarrier groups (or "clusters") in OFDMA systems.
These inventions, which already have been integrated into ADAPTIX's products, describe important capabilities for both mobile and fixed 4G wireless systems based on OFDMA. Such systems may include, but are not limited to, mobile WiMAX (IEEE 802.16e), 3GPP's long-term evolution (LTE), next-generation personal handyphone system (NG-PHS) and 3GPP2's ultra-mobile broadband (UMB).