Fecha de publicación: 18/12/2018 Fuente: Wipo "IOT" The invention discloses a relay-based NB-IoT uplink coverage enhancement system, comprising a base station, a relay point and a group of NB-IoT terminals, wherein, the base station and the relay point, the relay point and the NB-IoT terminals and between base station and NB-IoT terminals, through the NB-IOT communication protocol of the is used for communication connection. The invention relates to a relay-based NB-IoT uplink coverage enhancement system, which forms a coverage increasing system through a base station, a relay point and a set of NB-IoT terminals, The whole system structure issimple and practical, which greatly improves the coverage range of NPUSCH performance, ensures its bandwidth, improves its data transmission and communication ability, solves the problem of data lossor incapability to communicate with the base station normally, at the same time, it also effectively reduces the increase of the cost of the NB-IoT site, which in turn allows it to better meet the needs of the use.