Narrowband IoT (NB-IoT) is a low-power wide-area (LPWA) technology specifically designed for the Internet of Things (IoT). NB-IoT significantly improves the power consumption of user devices, system capacity and spectrum efficiency, especially with deep coverage.
New signals and channels for the physical layer have been developed to fulfil the high requirements of extended coverage (rural environment and deep indoor spaces) and extremely low device complexity. The costs of NB-IoT modules are comparable to GSM/GPRS modules. However, the underlying technology is much simpler than today's GSM/GPRS technology.