Study on Potential Interferences of 5G NR-U and WiFi 6E to Fixed Service in 6 GHz

This paper studies coexistence scenarios and observed potential interferences from services using unlicensed bands, Radio Local Area Network (RLAN) and 5G New Radio unlicensed (5G NR-U), to services using licensed band, Fixed service (FS). These interferences have the potential to disrupt FS if it exceeds established thresholds for protection criteria. To assess the impact of this coexistence, we develop several scenarios that focus on FS as the primary receiver to be protected and analyze potential interferences from RLAN and 5G NR-U. We perform a series of computer simulations for scenarios with varying power levels, series of distances, and number of devices under multipath fading channels. FS parameters are set using the practical parameters of the real-field in suburban Indonesia. We evaluate Interference-to-noise power ratio (INR) and Signal-to-interference ratio (SIR) at the FS receiver. Our results show that coexistence is feasible without causing interference to FS, when minimum separation distances and maximum number of devices for each station are well managed.