China and Japan cooperate in the 4G (4th generation) wireless research. Japanese wireless tech is high but it needs larger market. China lost in the 2G wireless and made big progress in 3G (TD-SDMA is one of the 3 international standards proposed by China's Datang and German's Simense. It is in commercial trial stage now)
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4G standardization efforts are expected to increase after 2007. In anticipation, Japan and China intend to collaborate, said the Japanese official.
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Japan, China to collaborate on 4G mobile