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<p>The ever-increasing throughput demand is aimed to be met by the combined use of the radio frequency (RF) and free space optical (FSO) spectrum. However, making this combination into practice is still uncertain, especially for high-mobility scenarios with a limited coherence window for beam training and tracking. Accordingly, significant research efforts are being made towards the integrated RF and FSO framework. In this paper, we propose an integrated framework that makes use of the RF spectrum with the FSO spectrum to serve vehicles that are moving under the coverage of a cloud radio access network (CRAN). The proposed scenario simultaneously exploits the advantages of large distance coverage and a huge spectrum from RF and FSO, respectively. It poses the challenge of higher attenuation of FSO through the coordinated multi-point (CoMP) transmission for users being served by FSO spectrum. At the same time, the proposed framework takes care of the high attenuation of RF signals under poor weather conditions, e.g., rainy conditions, by providing a hybrid link with the FSO spectrum. Furthermore, the simulation results show that a reduction of hand-off is observed through the proposed scheme of integration of RF with FSO spectrum in the CRAN-assisted vehicular networks.</p>

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RF FSO integration for hand-off reduction in CRAN assisted vehicular networks

  • 期刊论文

  • 发表日期：

    2025年5月17日

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  • Brijesh Kumbhani,
  • Sameer Kumar Singh,
  • Rohit Singh,
  • Sam Darshi,
  • Ghanshyam Singh,
  • Ila Sharma,
  • Erich Leitgeb,
  • Bernd Eichberger,
  • Khurshed A. Shah

摘要

The ever-increasing throughput demand is aimed to be met by the combined use of the radio frequency (RF) and free space optical (FSO) spectrum. However, making this combination into practice is still uncertain, especially for high-mobility scenarios with a limited coherence window for beam training and tracking. Accordingly, significant research efforts are being made towards the integrated RF and FSO framework. In this paper, we propose an integrated framework that makes use of the RF spectrum with the FSO spectrum to serve vehicles that are moving under the coverage of a cloud radio access network (CRAN). The proposed scenario simultaneously exploits the advantages of large distance coverage and a huge spectrum from RF and FSO, respectively. It poses the challenge of higher attenuation of FSO through the coordinated multi-point (CoMP) transmission for users being served by FSO spectrum. At the same time, the proposed framework takes care of the high attenuation of RF signals under poor weather conditions, e.g., rainy conditions, by providing a hybrid link with the FSO spectrum. Furthermore, the simulation results show that a reduction of hand-off is observed through the proposed scheme of integration of RF with FSO spectrum in the CRAN-assisted vehicular networks.