What is the coverage area of an NB-IoT base station?

An NB-IoT base station improves the gain by 20 dB when compared with LTE and GPRS base stations and is expected to cover places where signals are difficult to reach, such as underground garages, basements, and underground pipelines. The simulated data shows that the covering power of NB-IoT can reach 164 dB in independent deployment mode. The covering power of NB-IoT in in-band deployment and guard band deployment needs to be tested.