Mobile Heterogeneous Network (HetNet) is a key technology for 4G mobile implementation. The mobile HetNet is under standardization by 3GPP as a part of LTE-advanced standards. 3GPP’s LTE-Advanced is one of candidates for ITU-R's (International Telecommunication Union – Radio Communication) 4G mobile communication (IMT-Advanced) standards. The IMT-Advanced standards establishment is scheduled to be early 2011 through the expert evaluation process.
To find the key IPR holders for the mobile HetNet, a keyword search of the global patent data bases (USPTO, EPO, JPO, and WIPO (PCT)) has been performed. As of March 31 2010, the key IPR holders and their IPR share for the mobile HetNet (total of 192 published and issued patent applications) are as follows:
Samsung (16, 15%), LG (13, 12%), Matsushita Electric (9, 8%), NSN (8, 7%), NTT DoCoMo (7, 6%), Huawei (6, 6%), Qualcomm (6, 6%), Toshiba (6, 6%), Broadcom (5, 5%), Alcatel-Lucent (4, 4%), ETRI (4, 4%), Nokia (4, 4%), Ericsson (3, 3%), and Motorola (3, 3%).
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