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At this time, as 5G and advanced 5G networks are being rolled out worldwide, the groundwork for 5G began at the same time, and the transition from every generation, whether it is 2G or 5G, is a systematic and time-consuming process. A collaborative relationship among multiple organizations, research institutions, and governments is required, and one thing is clear. The commercial launch of 5G is not expected before 2030, but its groundwork is going on at full speed.