Vehicular Multi-Tier Distributed Computing with Hybrid THz-RF Transmission in Satellite-Terrestrial Integrated Networks

• DOI: 10.48550/arxiv.2501.15577
• Publication Date: 2025-01-26
• Authors: Ni Zhang; Kunlun Wang; Wen Chen; Jing Xu; Yonghui Li; Arumugam Nallanathan
• Keywords: Communications satellite

In this paper, we propose a Satellite-Terrestrial Integrated Network (STIN) assisted vehicular multi-tier distributed computing (VMDC) system leveraging hybrid terahertz (THz) and radio frequency (RF) communication technologies. Task offloading for satellite edge is enabled by THz using the orthogonal division multiple access (OFDMA) technique. For terrestrial computing, employ non-orthogonal (NOMA) vehicle clustering to realize task offloading. We formulate non-convex optimization problem aimed at maximizing computation efficiency jointly optimizing bandwidth allocation, subchannel-vehicle matching power allocation. To address problem, decompose original into four sub-problems solve them an alternating iterative approach. subproblem of it linear programming. sub-channel exploit many-to-one theory obtain result. The allocation OFDMA NOMA are solved quadratic transformation method. Finally, simulation results show that our proposed scheme significantly enhances STIN-based VMDC compared with benchmark schemes.