Sk telecom said it would establish a joint research center in china to develop a 3g mobile telecom standard, promoted by china, called time division-synchronous code division multiple access ( td-scdma ) sk電信還表示,該公司將在中國(guó)建立一家合資研究中心,用來(lái)開(kāi)發(fā)中國(guó)提出的3g移動(dòng)通信標(biāo)準(zhǔn)td-scdma。