Performance Analysis and Experimental Verification of 20MHz Dynamic Spectrum Sharing Network

Dynamic spectrum sharing (DSS) is of great significance in deploying 4G / 5G network cooperation under limited spectrum resources, realizing the smooth evolution from 4G to 5G, and using low frequency band to achieve wide coverage of 5G network. Although the DSS technology has many advantages above, the introduction of DSS in the network will introduce a lot of interference between different systems, which will affect the network performance. In this paper, through the analysis of the technical scheme of DSS based on the overhead calculation, the performance of various communication systems under DSS networking is theoretically evaluated. At the same time, 20 base stations are arranged in the outdoor experimental site. The call quality test of the DSS network is used to verify the influence of interference between different systems on the performance of various communication modes. Finally, the throughput of various communication modes under the DSS network is given through the drive test. At present, there is no literature to verify the networking performance of 20MHz DSS. This paper has great reference value for operators who need to deploy 4/5G cooperative networking in Sub 3GHz due to the shortage of spectrum resources.