A Study on Estimation Method of Interference State during Frequency Sharing in 5G Cellular Systems

We have been studying a method to determine the interference tolerance capability of 5GNR based on the variation of communication quality due to co-channel interference (CCI) and to determine the frequency sharing decision, assuming co-channel sharing in 5GNR [1]. In this study, we used a local 5G radio, which is an actual 5GNR, and proceeded with quality evaluation when CCI was generated in a shielded environment within a radio blackout curtain. We also evaluated the performance of a method to identify the amount of CCI power from the quality evaluation results. Through experiments on actual equipment, we have achieved highly accurate identification of the amount of CCI power for both downlink (access from the base station to the terminal) and uplink (access from the terminal to the base station) during TCP/UDP communication. Here, we analyzed the feature importance, which indicates the importance as an identifier, and found that the RSRP (Reference Signal Received Power) was the most important among the various communication quality evaluation norms.