1.
Trinh, Phuc V.; Sugiura, Shinya; Xu, Chao; Hanzo, Lajos
Toward Quantum SAGINs Harnessing Optical RISs: Applications, Advances, and the Road Ahead Journal Article
In: IEEE Network, vol. 39, no. 3, pp. 215–222, 2025, ISSN: 1558-156X.
Abstract | Links | BibTeX | Tags: Airplanes, Buildings, Drones, free-space optics, Low earth orbit satellites, next-generation network, Optical beams, Optical fiber networks, Optical fibers, optical reconfigurable intelligent surface, Quantum entanglement, quantum Internet, Relays, Satellites, Space-air-ground integrated network, Space-air-ground integrated networks
@article{trinh_toward_2025,
title = {Toward Quantum SAGINs Harnessing Optical RISs: Applications, Advances, and the Road Ahead},
author = {Phuc V. Trinh and Shinya Sugiura and Chao Xu and Lajos Hanzo},
url = {https://ieeexplore.ieee.org/document/10858146},
doi = {10.1109/MNET.2025.3536848},
issn = {1558-156X},
year = {2025},
date = {2025-05-01},
urldate = {2025-10-08},
journal = {IEEE Network},
volume = {39},
number = {3},
pages = {215–222},
abstract = {The space-air-ground integrated network (SAGIN) concept is vital for the development of seamless next-generation (NG) wireless coverage, integrating satellites, unmanned aerial vehicles, and manned aircraft along with the terrestrial infrastructure to provide resilient ubiquitous communications. By incorporating quantum communications using optical wireless signals, SAGIN is expected to support a synergistic global quantum Internet alongside classical networks. However, long-distance optical beam propagation requires line-of-sight (LOS) connections in the face of beam broadening and LoS blockages. To overcome blockages among SAGIN nodes, we propose deploying optical reconfigurable intelligent surfaces (ORISs) on building rooftops. They can also adaptively control optical beam diameters for reducing losses. This article first introduces the applications of ORISs in SAGINs, then examines their advances in quantum communications for typical SAGIN scenarios. Finally, the road ahead towards the practical realization of ORIS-aided NG quantum SAGINs is outlined.},
keywords = {Airplanes, Buildings, Drones, free-space optics, Low earth orbit satellites, next-generation network, Optical beams, Optical fiber networks, Optical fibers, optical reconfigurable intelligent surface, Quantum entanglement, quantum Internet, Relays, Satellites, Space-air-ground integrated network, Space-air-ground integrated networks},
pubstate = {published},
tppubtype = {article}
}
The space-air-ground integrated network (SAGIN) concept is vital for the development of seamless next-generation (NG) wireless coverage, integrating satellites, unmanned aerial vehicles, and manned aircraft along with the terrestrial infrastructure to provide resilient ubiquitous communications. By incorporating quantum communications using optical wireless signals, SAGIN is expected to support a synergistic global quantum Internet alongside classical networks. However, long-distance optical beam propagation requires line-of-sight (LOS) connections in the face of beam broadening and LoS blockages. To overcome blockages among SAGIN nodes, we propose deploying optical reconfigurable intelligent surfaces (ORISs) on building rooftops. They can also adaptively control optical beam diameters for reducing losses. This article first introduces the applications of ORISs in SAGINs, then examines their advances in quantum communications for typical SAGIN scenarios. Finally, the road ahead towards the practical realization of ORIS-aided NG quantum SAGINs is outlined.
2.
Gonem, Omaro Fawzi Abdelhamid; Vallejo, Luis; He, Jiaxiang; Giddings, Roger Philip; Jin, Wei; Yi, Xingwen; Faruk, Md Saifuddin; Tang, Jianming
Seamless Fiber-Wireless Access Network Convergence with Dynamic O-E-O Conversion-less Sub-Wavelength Switching and Tunable Photonic mmWave Generation Proceedings Article
In: 2024 Asia Communications and Photonics Conference (ACP) and International Conference on Information Photonics and Optical Communications (IPOC), pp. 1–4, 2024, ISSN: 2162-1098, (ISSN: 2162-1098).
Abstract | Links | BibTeX | Tags: Adaptive systems, B5G, Digital signal processing, fiber-wireless converged access networks, free-running lasers, Millimeter wave communication, millimeter waves, Optical fiber networks, Optical fibers, Optical signal processing, Optical switches, optical switching, Photonics, reconfigurable optical add/drop multiplexer (ROADM), Standards, Wireless networks
@inproceedings{abdelhamid_gonem_seamless_2024,
title = {Seamless Fiber-Wireless Access Network Convergence with Dynamic O-E-O Conversion-less Sub-Wavelength Switching and Tunable Photonic mmWave Generation},
author = {Omaro Fawzi Abdelhamid Gonem and Luis Vallejo and Jiaxiang He and Roger Philip Giddings and Wei Jin and Xingwen Yi and Md Saifuddin Faruk and Jianming Tang},
url = {https://ieeexplore.ieee.org/document/10809809},
doi = {10.1109/ACP/IPOC63121.2024.10809809},
issn = {2162-1098},
year = {2024},
date = {2024-11-01},
urldate = {2025-10-08},
booktitle = {2024 Asia Communications and Photonics Conference (ACP) and International Conference on Information Photonics and Optical Communications (IPOC)},
pages = {1–4},
abstract = {In order to meet the diverse needs of different services and applications in the B5G era, seamless integration of fiber and wireless network segments of next-generation radio access networks (NG-RANs), with flexible/fine channel switching granularity and ultra-low latency, is vital for enabling dynamic and continuous flow of heterogenous signals of various characteristics across different network segments without optical-electrical-optical (O-E-O) conversions or digital signal processing (DSP) at intermediate nodes. To address these requirements cost-effectively, we experimentally demonstrate 3xl.333 Gbps flexible BBU-UE connections over 10 km standard single-mode fiber (SSMF) and adaptable millimeter-wave (mmWave) wireless reach up to 50 m, using free-running laser/envelope detection-based tunable mm Wave generation/detection, and soft-ROADM-enabled dynamic sub-wavelength-level channel switching. The proposed technique requires no O-E-O conversions or DSP at intermediate nodes and offers dynamic RRH-controllable mmWave transmission with large frequency tunability and adaptive wireless network coverage.},
note = {ISSN: 2162-1098},
keywords = {Adaptive systems, B5G, Digital signal processing, fiber-wireless converged access networks, free-running lasers, Millimeter wave communication, millimeter waves, Optical fiber networks, Optical fibers, Optical signal processing, Optical switches, optical switching, Photonics, reconfigurable optical add/drop multiplexer (ROADM), Standards, Wireless networks},
pubstate = {published},
tppubtype = {inproceedings}
}
In order to meet the diverse needs of different services and applications in the B5G era, seamless integration of fiber and wireless network segments of next-generation radio access networks (NG-RANs), with flexible/fine channel switching granularity and ultra-low latency, is vital for enabling dynamic and continuous flow of heterogenous signals of various characteristics across different network segments without optical-electrical-optical (O-E-O) conversions or digital signal processing (DSP) at intermediate nodes. To address these requirements cost-effectively, we experimentally demonstrate 3xl.333 Gbps flexible BBU-UE connections over 10 km standard single-mode fiber (SSMF) and adaptable millimeter-wave (mmWave) wireless reach up to 50 m, using free-running laser/envelope detection-based tunable mm Wave generation/detection, and soft-ROADM-enabled dynamic sub-wavelength-level channel switching. The proposed technique requires no O-E-O conversions or DSP at intermediate nodes and offers dynamic RRH-controllable mmWave transmission with large frequency tunability and adaptive wireless network coverage.
3.
Li, Juncheng; Huang, Yifan; Huang, Shenjie; Tavakkolnia, Iman; Haas, Harald; Safari, Majid
Integrated Communication and Positioning for IRS-Assisted LiFi Networks: 2024 IEEE Wireless Communications and Networking Conference (WCNC) Journal Article
In: 2024 IEEE Wireless Communications and Networking Conference, WCNC 2024 - Proceedings, pp. 01–06, 2024, ISSN: 979-8-3503-0359-9, (Place: Piscataway, NJ).
Abstract | Links | BibTeX | Tags: Downlink, Light fidelity, machine learning algorithms, mobile communication, Optical fiber networks, surface emitting lasers, Wireless communication
@article{li_integrated_2024,
title = {Integrated Communication and Positioning for IRS-Assisted LiFi Networks: 2024 IEEE Wireless Communications and Networking Conference (WCNC)},
author = {Juncheng Li and Yifan Huang and Shenjie Huang and Iman Tavakkolnia and Harald Haas and Majid Safari},
url = {https://ieeexplore.ieee.org/document/10570819/},
doi = {10.1109/wcnc57260.2024.10570819},
issn = {979-8-3503-0359-9},
year = {2024},
date = {2024-07-01},
urldate = {2024-08-20},
booktitle = {2024 IEEE Wireless Communications and Networking Conference (WCNC)},
journal = {2024 IEEE Wireless Communications and Networking Conference, WCNC 2024 - Proceedings},
pages = {01–06},
publisher = {IEEE},
address = {Dubai, United Arab Emirates},
series = {IEEE Wireless Communications and Networking Conference, WCNC},
abstract = {Light-fidelity (LiFi) is a networked optical wireless communication (OWC) solution to achieve high-speed mobile communications. To address the misalignment challenges encountered in laser-based LiFi, this study introduces an innovative full-coverage indoor LiFi system with integrated communication and positioning capabilities, leveraging intelligent reflected surfaces (IRSs). By design, the proposed system ensures successful wireless downlink connectivity, irrespective of the user's random location and orientation status. An algorithm is developed to ascertain the optimal deployment of both access points (APs) and IRS layers. Moreover, this study introduces a machine learning (ML)-based OWC positioning approach designed to enhance the accuracy of the user positioning, thereby effectively boosting the performance of the IRS-assisted communication system. Numerical results demonstrate the superiority of the proposed positioning approach over traditional methods in terms of average data rate.},
note = {Place: Piscataway, NJ},
keywords = {Downlink, Light fidelity, machine learning algorithms, mobile communication, Optical fiber networks, surface emitting lasers, Wireless communication},
pubstate = {published},
tppubtype = {article}
}
Light-fidelity (LiFi) is a networked optical wireless communication (OWC) solution to achieve high-speed mobile communications. To address the misalignment challenges encountered in laser-based LiFi, this study introduces an innovative full-coverage indoor LiFi system with integrated communication and positioning capabilities, leveraging intelligent reflected surfaces (IRSs). By design, the proposed system ensures successful wireless downlink connectivity, irrespective of the user's random location and orientation status. An algorithm is developed to ascertain the optimal deployment of both access points (APs) and IRS layers. Moreover, this study introduces a machine learning (ML)-based OWC positioning approach designed to enhance the accuracy of the user positioning, thereby effectively boosting the performance of the IRS-assisted communication system. Numerical results demonstrate the superiority of the proposed positioning approach over traditional methods in terms of average data rate.
4.
Vallejo, Luis; Gonem, Omaro Fawzi Abdelhamid; Jin, Wei; Giddings, Roger Philip; Tang, Jianming
Soft-ROADM-enabled Seamlessly Converged Optical-Wireless Access Networks with Free-Running Laser-based Tunable mmWave Generation and RF Envelope Detection Proceedings Article
In: 2024 IEEE Opto-Electronics and Communications Conference (OECC), pp. 1–3, 2024, ISSN: 2166-8892, (ISSN: 2166-8892).
Abstract | Links | BibTeX | Tags: B5G, Bit rate, fronthaul, Millimeter wave communication, mmWave, Optical fiber networks, Optical fibers, Optical switches, optical switching, Photonics, radio access network (RAN), Radio access networks, Radio frequency, RF envelope detection, Wireless communication
@inproceedings{vallejo_soft-roadm-enabled_2024,
title = {Soft-ROADM-enabled Seamlessly Converged Optical-Wireless Access Networks with Free-Running Laser-based Tunable mmWave Generation and RF Envelope Detection},
author = {Luis Vallejo and Omaro Fawzi Abdelhamid Gonem and Wei Jin and Roger Philip Giddings and Jianming Tang},
url = {https://ieeexplore.ieee.org/document/10975552},
doi = {10.1109/OECC54135.2024.10975552},
issn = {2166-8892},
year = {2024},
date = {2024-06-01},
urldate = {2025-10-08},
booktitle = {2024 IEEE Opto-Electronics and Communications Conference (OECC)},
pages = {1–3},
abstract = {Incorporating O-E-O conversion-free Soft-ROADMs and free-running laser-based tunable mmWave generations with RF envelope detection, a cost-effective optical-wireless-converged RAN supporting flexible ultra-dense BBU-UE connectivity without O-E-O conversion and DSPs at any intermediate nodes is proposed and experimentally demonstrated, achieving 2×2.4-Gbit/s dynamic connections over 10-km fiber and 2-m @38GHz mmWave transmissions.},
note = {ISSN: 2166-8892},
keywords = {B5G, Bit rate, fronthaul, Millimeter wave communication, mmWave, Optical fiber networks, Optical fibers, Optical switches, optical switching, Photonics, radio access network (RAN), Radio access networks, Radio frequency, RF envelope detection, Wireless communication},
pubstate = {published},
tppubtype = {inproceedings}
}
Incorporating O-E-O conversion-free Soft-ROADMs and free-running laser-based tunable mmWave generations with RF envelope detection, a cost-effective optical-wireless-converged RAN supporting flexible ultra-dense BBU-UE connectivity without O-E-O conversion and DSPs at any intermediate nodes is proposed and experimentally demonstrated, achieving 2×2.4-Gbit/s dynamic connections over 10-km fiber and 2-m @38GHz mmWave transmissions.