As 5G is now deployed at full speed in the frequency bands below 6Ghz (including both low and mid-frequency bands), the focus is shifting to the frontier of the next frequency band. Even from an economic and technical point of view, the mid-band used in combination with Massive MIMO has achieved great success, achieving more total capacity and throughput growth at a much lower capital expenditure than originally envisaged, but the baseline situation shows , Mobile data traffic is expected to increase by 15-25 times in the next ten years, and will exceed 1ZB per month by 2030. Although Massive MIMO and frequency bands below 6Ghz will bring a 5x to potential 15x increase to a large extent, this may not be enough to meet the capacity requirements of the next ten years considering the economic constraints faced by operators.
