QoS-Guaranteed Power-Saving Configuration Prediction Scheme for 5G IoT

Abstract

The narrowband Internet-of Things (NB-IoT) standard has been developed to provide low data rate requirement for 5G IoT systems. To prolong the battery lifetime of user equipment (UE), the extend discontinuous reception (eDRX) and power saving mode (PSM) are specified in the standard for power efficient purpose. However, it is non-trivial to configure suitable power-saving parameters to achieve power conservation while reducing transmission latency. In this paper, we proposed a QoS-guaranteed power-saving configuration prediction (QPCP) scheme to effectively reduce system power consumption with guaranteed packet delay constraints. By adopting partially observable Markov decision process (POMDP) and scheduling of base station (BS), a feasible set of power-saving parameters can be obtained. Simulation results show that the proposed QPCP scheme outperforms other existing methods for power-saving of both UE and BS with guaranteed QoS constraints.