Fecha de publicación: 14/09/2021 Fuente: Wipo "IOT" The invention discloses a local area network meter reading system based on NB-IOT, which comprises a control unit, the control unit comprises an NB-IOT gateway module and a meter reading module, the NB-IOT gateway module comprises an NB-IOT module, a storage unit, a WIFI (Wireless Fidelity) module and an NB-IOT antenna, the transmitting power of the NB-IOT gateway module and the meter reading module is 16db, the transmitting power is enhanced, and the condition that the signals are always good and bad is avoided; the number of the NB-IOT gateway module in each control unit is one, and the number of the meter reading modules in each control unit is N, so that when meter reading is carried out, only one NB-IOT works, other modules are WIFI signals, the problems that multiple NB-IOTs are started at the same time and multiple channels are blocked are avoided, one NB-IOT works at the same time, the transmitting power can be increased, other NB-IOTs are prevented from being interfered, the problem of weak signals is solved, and according to the cost, no matter how many modules exceed the standard in each system, only one NB-IOT module works, only one SIM card fee and module need to be paid, and the rest are all free WIFI connections, so that the cost is low and the system is more economical.