Title: Efficient SWIPT transmission optimisation in decentralised FD-NOMA-V2X systems

Authors: Peiying Zhang; Shengpeng Chen; Yi Wang; Di Zhang; Lizhuang Tan; Jian Wang

Addresses: Qingdao Institute of Software, College of Computer Science and Technology, China University of Petroleum (East China), Qingdao, 266580, China; Shandong Key Laboratory of Intelligent Oil and Gas Industrial Software, Qingdao, 266580, China; Key Laboratory of Computing Power Network and Information Security, Ministry of Education, Shandong Computer Science Center (National Supercomputer Center in Jinan), Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, China ' Qingdao Institute of Software, College of Computer Science and Technology, China University of Petroleum (East China), Qingdao, 266580, China; Shandong Key Laboratory of Intelligent Oil and Gas Industrial Software, Qingdao, 266580, China ' School of Electronics and Information, Zhengzhou University of Aeronautics, Zhengzhou, 450046, China ' School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou, 450001, China ' Key Laboratory of Computing Power Network and Information Security, Ministry of Education, Shandong Computer Science Center (National Supercomputer Center in Jinan), Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, China; Shandong Provincial Key Laboratory of Computing Power Internet and Service Computing, Shandong Fundamental Research Center for Computer Science, Jinan, 250014, China ' College of Science, China University of Petroleum (East China), Qingdao, 266580, China

Abstract: This paper investigates the effectiveness of simultaneous wireless information and power transfer (SWIPT) in a decentralised full-duplex non-orthogonal multiple access vehicle-to-everything (FD-NOMA-V2X) system. The proposed model enables direct communication between devices, reducing the burden on cellular networks in vehicular communication. Additionally, the FD-NOMA technology further enhances the system's spectral efficiency (SE). Considering the limited battery capacity of devices, a SWIPT transmission framework is introduced based on the system model, formulated as an optimisation problem. The optimal solution to this problem is derived using the CVX tool. To increase the model's practical applicability, a suboptimal solution with lower computational complexity than the CVX-based method is also proposed, based on an analytical approach. Simulation results demonstrate that as the energy harvesting threshold increases, the power allocation coefficients in both methods converge to a common point. Furthermore, the analytical method significantly reduces computation time compared to the CVX tool.

Keywords: caching and sharing mechanism; 5G; internet of things; IoT; energy efficiency.

DOI: 10.1504/IJAHUC.2026.151263

International Journal of Ad Hoc and Ubiquitous Computing, 2026 Vol.51 No.1, pp.1 - 11

Received: 19 Nov 2024
Accepted: 15 May 2025
Published online: 20 Jan 2026 *

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