In this paper, an air-interface traffic-load based intrusion detection approach is proposed. The base station can intelligently learn the traffic-load features by analyzing the air-interference signal in the massive machine type communications(mMTC) nodes' random access procedure. With the help of the statistic information under the normal case, the framework of intrusion and attack detection for massive machine type communications(MTC) networks is established and a real time detection scheme is designed. T...