Low Power Consumption Cluster Scheduling and Power Control Design for Non-Orthogonal Multiple Access Aided Down-Link IoT Networks

In this paper, we study the power allocation and cluster scheduling in a downlink non-orthogonal multiple access (NOMA) network deployed with massive internet of things (IoT) devices with constraints of battery capacity. Our objective is to minimize the total transmit power while meeting the quality of service (QoS) demands for each IoT device. In the considered NOMA network, each cluster can multiplex the access of more than two IoT devices. We derive the minimum power allocated to every IoT device in each cluster with considerations of the QoS demands. Then we use the potential game model to characterize this NOMA network, and present a cluster scheduling scheme. Simulation results demonstrate that using the proposed algorithm, the consumed power is far less than the power consumed by the conventional orthogonal multiple access (OMA) scheme and the conventional NOMA scheme.