With limited wireless spectrum resources, Dynamic Spectrum Sharing is a way to improve the efficiency of spectrum usage. With reference to the development and operation experience of the hierarchical sharing mechanism of the US Citizens Broadband Radio Service (CBRS), ACTS introduced CommScope Spectrum Access System (SAS) and integrated Taiwan Graphic information to build a team with domestic mobile telecommunications operators and equipment suppliers participating in the field test verification research project of TTC for the construction of Dynamic Spectrum Sharing access technology.