Energy-and-Spectrum-Efficient Trade-Off Oriented Multi-Domains Resource Management Approach in RIS-Aided IABN Using NOMA With Imperfect SIC
Zhongyu Ma, Jing Li, Guangjie Han, Yajing Wang, Zhirong Liu, Zhanjun Hao, Qun Guo · IEEE Transactions on Green Communications and Networking · 2025
Although reconfigurable intelligent surface (RIS)-assisted millimeter-wave integrated access and backhaul networks (mmWave IABN) offer a cost-effective solution for 6G systems, they face difficulties in meeting the spectral efficiency (SE) and energy efficiency (EE) requirements due to environmental uncertainties and interference. This paper focuses on the application of RIS-aided mmWave IABN and proposes an energy-and-spectrum-efficient trade-off oriented multi-domains resource management (ETOM-RM) scheme to address these challenges by optimizing the trade-off between SE and EE. The scheme uses non-orthogonal multiple access (NOMA) technology combined with imperfect successive interference cancellation (SIC), and it decomposes the optimization problem into two sub-problems: user transmission power and RIS phase-shift control, as well as bandwidth partition between access and backhaul. Simulation results validate the ETOM-RM scheme’s effectiveness in enhancing SE and optimizing the SE-EE trade-off. Compared to the OMA-RMM and RPS-RMM schemes, it demonstrates superior performance. Additionally, the observed trade-off between SE and EE underscores the scheme’s robustness across diverse scenarios, which provides concrete guidelines for advancing environmentally sustainable wireless communication technologies.