Hardware demonstration on an efficient radio access for massive machine-type communication (mMTC)

A rapid increase of uplink traffic is predicted with the spread of IoT (Internet of Things) devices. The 5G (5th generation mobile communications systems) requires that base stations effectively receive small-size packets but massive uplink signals transmitted by the IoT devices. To solve this problem, we have researched and developed techniques to increase number of devices that one base station can accumulate and to decrease delay time. We have evaluated channel estimation techniques and interference suppression and cancellation techniques by computer simulation. However, we have not evaluated the techniques on real machine yet. In this paper, we use software defined radio (SDR) on wired environment and evaluate accuracy of the proposed channel estimation techniques and signal separation performance of successive interference cancellation techniques.