Coexistence between 5G and Fixed Services

This study focuses on the coexistence between 5G networks and Fixed Services (FS), where fixed links (FL) is one application. 5G is expected to require spectrum in high frequency ranges and fixed services is a highly probable candidate to share spectrum with. Most of the spectrum is co-primary allocated to both mobile and fixed. This study gives assessment on the inference to/from the fixed link, and identifies areas for further study. The results indicate that the interference that 5G radiates to the fixed link is higher than the requirement in the co- channel case. However a low traffic load at 5G together with beamforming is the best scenario with a 30\% probability of interference. One possibility to reduce the probability of interference to 6\% is to increase antenna directivity of the fixed link's. This can be a valid solution to be applied for operators owning both fixed and 5G networks. The interference from fixed link to 5G downlink is below the allowed limit and it is found that at 5G downlink the main contributor to the aggregated interference is the intra network interference. The interference scenario can be improved by utilizing coordination protocols with beam- steering, and advanced antennas. Operators can also consider to deploy in a coordinated manner, or even using other deployments type like micro or indoor.