Development of a Model to Estimate Future Exposure with Increased Utilization of Mobile Radio Base Stations

With the further development of mobile radio networks in terms of new frequencies used and a re-organized allocation of the existing mobile radio bands, a change of the instantaneous exposure can be anticipated. Therefore, the first steps for modelling the instantaneous exposure due to future utilization of the mobile radio bands were taken here by recording the instantaneous exposure to all LTE and 5G bands at two base stations, each equipped with massive MIMO antennas, at varying utilization levels caused by a user equipment, while the network operator simultaneously monitored the resource blocks in use. In order to calculate the change in exposure due to traffic caused by the user equipment, the exposure measured per data rate and per measurement point was normalized to the exposure of the signaling. This so found power-related difference factor demonstrates a linear correlation with the resource blocks utilized across all LTE bands. This seems to imply that the expected future exposure can be calculated on the basis of the signaling exposure. However, the findings for 5G suggest that a linear dependency between utilization and exposure due to beamforming cannot be derived in this way.