Background
NB-IoT (a new cellular technology defined by 3GPP) is a low power wide area (LPWA) Internet of Things connection, which allows terminals to collect and exchange data with fewer resources than GRPS, 3G, LTE and other technologies. With the global telecom carriers building and commercializing NB-IoT networks, a large number of new scenarios and applications that traditional cellular technology can not support appear in the market.