Joint User Pairing and Subcarrier Allocation for NOMA-based Hybrid Power Line and Visible Light Communication Systems

Abstract

Abstract With the rapid growth of the number of mobile communication users, the radio frequency bands occupied by traditional radio frequency (RF) communication are becoming more and more crowded, and visible light communication (VLC) based on light emitting diode (LED) has become a powerful candidate. However, visible light cannot be used directly as an information source, and power line communication (PLC) is needed to provide data to the VLC transmitter. In a hybrid power line and visible light communication (HPV) system, the PLC can transmit data to the VLC transmitter. In order to improve spectrum utilization, we introduce non-orthogonal multiple access (NOMA) technology, but allocating all users to a resource block will result in higher computational complexity and decoding delay. This paper proposes a joint user pairing and subcarrier allocation algorithm based on fairness (IGA-JUPSA). While ensuring the performance of the system, the algorithm can also reduce the complexity of calculation and improve user satisfaction. The simulation results show that the proposed IGA-JUPSA scheme can reduce the computational complexity while ensuring the performance of the HPV system, and can also take into account the fairness of the HPV system and user satisfaction.