THE STUDY OF DYNAMIC INTERFERENCE DETECTION AND POWER SAVING OF NB-IOT BASED ON PARTIAL NETWORK DEPLOYMENT

The Internet of Things is ubiquitous in life, and a new narrow-bandwidth Internet of Things (IoT) technology is emerging. It has the advantages of low power consumption and wide area network such as large coverage area, longer battery life, stable throughput, and low bandwidth latency. After the popularization of IoT devices, the old hardware devices under the Long Term Evolution (LTE) system architecture can still be compatible and reused, and the original low-cost infrastructure can be used during device deployment of the Narrowband Internet of Things (NB-IoT). On the other hand, in the process of 5G deployment some old base stations will not support NB-IoT, and some NB-IoT and 5G base stations will bring interference problems. This paper finds several techniques that can effectively reduce path loss and interference, including power boosting, repetition, listen before talk (LBT) and resource blanking. Therefore, this paper proposes a two-stage algorithm, which can effectively solve and reduce the interference problem of some supporting and non-supporting NB-IoT base stations, and can effectively reduce the collision probability and energy loss between terminal devices to optimize resource allocation and energy usage.