Beyond IMT-2000 System에 대한 고찰

Investigation for Beyond IMT-2000 System

The transport network evolved for almost 30 years at 3 period's generation(80's lG, 90's 2G and 2000's 3G). The next generation's mobile communication requires improved service. In addition, the system will integrate various networks, which will give rise to high levels of service corresponding to superhigh speed broadband multimedia. Current global mobile communication adopts nationally individual techniques(CDMA vs. GSM; 3GPP vs. 3GPP2). However, in 4G system, global standardization is under way according to the introduction of global roaming. This paper reviews the standardization progress in ITU-R where it is well undergoing, crucial techniques required for the realization and it's current research status.