Joint Optimization of Beam-Hopping Design and NOMA-Assisted Transmission for Flexible Satellite Systems
Por:
Wang A., Lei L., Lagunas E., Perez-Neira A.I., Chatzinotas S., Ottersten B.
Publicada:
1 ene 2022
Ahead of Print:
1 ene 2022
Resumen:
Next-generation satellite systems require more flexibility in resource management such that available radio resources can be dynamically allocated to meet time-varying and non-uniform traffic demands. Considering potential benefits of beam hopping (BH) and non-orthogonal multiple access (NOMA), we exploit the time-domain flexibility in multi-beam satellite systems by optimizing BH design, and enhance the power-domain flexibility via NOMA. In this paper, we investigate the synergy and mutual influence of beam hopping and NOMA. We jointly optimize power allocation, beam scheduling, and terminal-timeslot assignment to minimize the gap between requested traffic demand and offered capacity. In the solution development, we formally prove the NP-hardness of the optimization problem. Next, we develop a bounding scheme to tightly gauge the global optimum and propose a suboptimal algorithm to enable efficient resource assignment. Numerical results demonstrate the benefits of combining NOMA and BH, and validate the superiority of the proposed BH-NOMA schemes over benchmarks. © 2002-2012 IEEE.
Filiaciones:
Wang A.:
Interdisciplinary Center for Security, Reliability and Trust, University of Luxembourg, 1855 Luxembourg
Lei L.:
School of Information and Communications Engineering, Xi’
Lagunas E.:
Interdisciplinary Center for Security, Reliability and Trust, University of Luxembourg, 1855 Luxembourg
Perez-Neira A.I.:
Centre Tecnolò
Chatzinotas S.:
Interdisciplinary Center for Security, Reliability and Trust, University of Luxembourg, 1855 Luxembourg
Ottersten B.:
Interdisciplinary Center for Security, Reliability and Trust, University of Luxembourg, 1855 Luxembourg
Green Submitted, Green Published, hybrid, All Open Access; Green Open Access; Hybrid Gold Open Access
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