WOS3 – Optical & multi-technology communications
Friday, 6 June 2025, 9:00-10:30, room 1.C
Session Chair: Pedro Merino (Univ. Malaga, Spain)
End-to-End Evaluation of the Int5Gent Platform: Integrating 5G Enabling Technologies in a Holistic Service to Physical Layer Platform
Evrydiki Kyriazi and Panagiotis Toumasis (National Technical University of Athens, Greece); Georgios P. Katsikas, Labros Papadopoulos and Vasileios Charlaftis (UBITECH, Greece); Caro Meysmans (Ghent University-IMEC, Belgium); Juan Brenes (Nextworks, Italy); Dimitris Diakakis (OTE, Greece); Ioanna Mesogiti (Hellenic Telecommunications Organization, Greece); Wojtek Wasko (NVIDIA, Israel); Raul Muñoz (Centre Tecnològic de Telecomunicacions de Catalunya (CTTC/CERCA), Spain); David Larrabeiti (Universidad Carlos III de Madrid, Spain); Zhongxia Simon He (Chalmers University of Technology & Microwave Electronic Lab, Sweden); Elad Dayan (SIKLU, Israel); Ignasi Garcia-Milà Vidal (Worldsensing, Spain); Juan Pedro Fernández-Palacios (Telefónica I+D, Spain); Carlos Agustín Manso (Centre Tecnològic de Telecomunicacions de Catalunya (CTTC/CERCA), Spain); Carles Miralpeix Llorach (Worlsensing, Spain); Luka Korsic (INTERNET INSTITUTE, Ltd, Slovenia); Josep M Fabrega (Centre Tecnologic de Telecomunicacions de Catalunya, Spain); Olga Segou and Ioannis Avramidis (Netcompany, Greece); George Lyberopoulos (COSMOTE Mobile Telecommunications S.A., Greece); Eleni Theodoropoulou (Hellenic Telecommunications Organization, Greece); Victor Lopez (Telefonica, Spain); Janez Sterle (INTERNET INSTITUTE Ltd, Slovenia); Guy Torfs (Ghent University & Imec, Belgium); Chris Vagionas (Aristotle University of Thessaloniki, Greece); Dimitrios Klonidis (UBITECH, Greece); Giannis Giannoulis and Hercules Avramopoulos (National Technical University of Athens, Greece); Dimitrios Apostolopoulos (National Technical University of Athens & Institute of Communication and Computer Systems, Greece)
The Int5Gent project integrates advanced technologies across the data plane, control plane, and application layers to enable high-capacity, low-latency, and flexible network solutions for demanding vertical applications in beyond 5G (B5G) networks. Focusing on edge computing, Sigma-Delta Radio-over-Fiber (SD-RoF), Digital RoF (D-RoF), Analog RoF (A-RoF), millimeter-wave (mmWave) backhaul, and GPU-enabled processing, it supports AI-driven use cases such as real-time video analysis and critical communication for Public Protection and Disaster Relief (PPDR). The project’s demonstrators show: a) real-time human detection and AI inference at 15 frames per second (fps), showcasing network resiliency and integration of A-RoF with D-band transceivers for high-speed video transmission and b) the system’s ability to monitor critical infrastructure (railway), using edge-based processing for safety-critical applications and dynamic transport slicing for operational needs. Both demonstrators validated the platform’s ability to orchestrate and optimize resources in real-time, offering scalable, resilient solutions for future 5G deployments.
Four Fixed O-Band WDM Channels for 100 Gbps and 200 Gbps IMDD Transmissions for VHSP
Georges Gaillard (Orange, France & IMT Atlantique, France); Fabienne Saliou (Orange, France); Jeremy Potet (Orange Labs, France); Gael Simon and Dylan Chevalier (Orange, France); Philippe Chanclou (Orange Labs, France); Luiz Anet Neto (Imt-atlantique, France); Michel Morvan (IMT-atlantique, France); Bruno Fracasso (IMT Atlantique, France)
We assess Intensity Modulation and Direct Detection (IMDD) for Very High Speed PON (VHSP), focusing on the transmission capabilities of 100 Gbps and 200 Gbps using four fixed O-band wavelengths. VHSP architectures offer a cost-effective way to deliver ultra-high data rates over shared infrastructures, effectively bridging the gap between next-generation wireless access points and core networks. The competitive advantage of leveraging existing 50G-PON technology allows us to achieve 200 Gbps without the complexities and costs associated with other candidate solutions such as coherent systems. We use simple optics with Distributed Feedback (DFB) or Externally Modulated Laser (EML)-Semiconductor Optical Amplifier (SOA), Avalanche Photodiode (APD), and Analog Feed Forward Equalizer (AFFE) at 25 and 50 Gbit/s over 4 fixed-channels, achieving error-free transmissions over 20 km Single- Mode Fiber (SMF) with >32 dB optical budget, despite Four-Wave Mixing (FWM) penalties.
Exploring Multi-Antenna Techniques for Satellite-Terrestrial Coexistence in Upper Mid-Band
Yerassyl Akhmetkaziyev (Huawei Munich Research Center, Germany & Universidad Politecnica de Catalunya, Spain); Malte Schellmann (Huawei Technologies German Research Center, Germany); Hanwen Cao (Huawei Munich Research Center, Germany); Marius Caus (CTTC, Spain); Ana Isabel Pérez Neira (Centre Tecnològic de Telecomunicacions de Catalunya (CTTC-CERCA) & Universitat Politecnica de Catalunya – UPC, Spain)
Future 6G communications are expected to be complemented by non-terrestrial networks (NTNs), particularly satellites, to ensure ubiquitous connectivity. Furthermore, to address the growing spectrum shortage in terrestrial networks (TNs), the upper mid-band (7-24 GHz), currently known as frequency range 3 (FR3), is emerging as a key frequency band due to its appealing balance between capacity and coverage. However, this band is already utilized by incumbent satellite communications, making the investigation of NTN and TN coexistence in FR3 critical. This paper explores linear multi-antenna receiver techniques at TN user equipment (UE), aimed at enhancing coexistence between NTN and TN, leveraging the increased number of antennas that higher frequency bands enable on UE. Specifically, we apply Maximum Ratio Combining (MRC) and Interference Rejection Combining (IRC) techniques to address the dual challenges of interference suppression and signal enhancement. Simulation results demonstrate the effectiveness of these techniques in improving TN UE performance and reducing satellite interference.
Full-Duplex Transmissions in Heterogeneous Fiber FSO-Wireless Converged Access Networks at Ka Band
Luis Vallejo (Bangor University, United Kingdom (Great Britain)); Jose Mora and Beatriz Ortega (Universitat Politecnica de Valencia); Wei Jin (Bangor University, United Kingdom (Great Britain)); Jaime Romero (Universitat Politecnica de Valencia, Spain); Jianming Tang (Bangor University, United Kingdom (Great Britain))
To overcome the challenges associated with increased demands for mobile capacity and network densification in the 5G and beyond era, this paper experimentally demonstrates full-duplex heterogeneous fiber-FSO-wireless converged links between the central office-baseband unit (CO-BBU) and the remote radio head (RRH). The centralization of active optical sources for the downlink (DL) and uplink (UL) enables dynamic resource sharing and allocation, optimizing wavelength utilization and improving overall network efficiency. The DL uses a directly modulated laser (DML) with free-running laser-assisted mmWave signal generation and envelope detection for the downstream, transmitting a 100 MHz 16-QAM signal at 39 GHz. The UL reuses the DL wavelength for upstream transmission, employing intensity modulation and direct detection (IM-DD) of a 100 MHz QPSK signal at 36.5 GHz. The bidirectional heterogeneous network comprises a 10 km SSMF, a 1.8 m FSO link, and a 3 m wireless radio link, providing flexibility for future networks. The results show successful transmissions of 16-QAM and QPSK signals up to 200 Mbit/s and 400 Mbit/s for DL and UL, respectively, under the full-duplex transmissions. Additionally, using 5G NR OFDM signals, a maximum bit rate of 2.15 Gbit/s and 1.07 Gbit/s is achieved for the DL and UL, respectively, demonstrating the cost-effectiveness of the proposed solution.
Short-Range Energy-Aware Optical Wireless Communications Module for ns-3
Tiago S Ribeiro and Sérgio M. Silva (INESC TEC, Portugal); João Pedro Loureiro (University of Porto, Portugal & INESC TEC, Portugal); Eduardo Nuno Almeida (INESC TEC and Faculdade de Engenharia, Universidade Do Porto, Portugal); Nuno T. Almeida (INESC TEC and FEUP – University of Porto, Portugal); Helder Fontes (INESC TEC and FEUP, Portugal)
Optical Wireless Communications (OWC) has recently emerged as a viable alternative to radio-frequency technology, especially for the Internet of Things (IoT) domain. However, current simulation tools primarily focus on physical layer modelling, ignoring network-level issues and energy-constrained environments. This paper presents an energy-aware OWC module for ns-3 that addresses these limitations. The module includes specific PHY and MAC layers and integrates an energy model, a mobility model, and models of monochromatic transceivers and photodetectors, supporting both visible light and infrared (IR) communications. Verification against MATLAB simulations confirms the accuracy of our implementation. Additionally, mobility tests demonstrate that an energy-restricted end device transmitting via IR can maintain a stable connection with a gateway at distances up to 2.5 m, provided the SNR is above 10 dB. These results confirm the capabilities of our module and its potential to facilitate the development of energy-efficient OWC-based IoT systems.
