WOS2: Wireless, Optical, and Satellite Networks II
Thursday, 10 June 2021, 9:30-11:00, Zoom Room
Session Chair: Morio Toyoshima (NICT, Japan)
ELIoT: New Features in LiFi for Next-Generation IoT
Jean-Paul Linnartz (Technische Universiteit Eindhoven, The Netherlands); Carina Ribeiro Barbio Corrêa and Thiago Elias B Cunha (Eindhoven University of Technology, The Netherlands); Eduward Tangdiongga (Eindhoven University of Technology & Institute for Photonic Integration, The Netherlands); Ton Koonen (IPI, Eindhoven University of Technology, The Netherlands); Xiong Deng (TU Eindhoven, The Netherlands); Mathias Wendt (Signify, The Netherlands); Anteneh Abbo (Philips Research, The Netherlands); Pieter J Stobbelaar (Signify, The Netherlands); Marcel Müller and Daniel Behnke (Weidmüller Group, Germany); Marcos Vazquez and Santi Vicent Colonques (MaxLinear, Spain); Martijn Bech (KPN, The Netherlands); Taner Metin (Fraunhofer FOKUS Institute, Germany); Marc Emmelmann (Fraunhofer FOKUS, Germany); Sepideh Mohammadi Kouhini (Fraunhofer Henrich Hertz Institute, Germany); Kai Lennert Bober and Christoph Kottke (Fraunhofer Heinrich Hertz Institute, Germany); Volker Jungnickel (Fraunhofer Heinrich Hertz Institute & Technische Universität Berlin, Germany)
The Internet of Things currently is predominantly narrowband and cannot always guarantee high reliability and low latency. Future IoT applications such as flexible manufacturing, augmented reality and self-driving vehicles need sophisticated real-time processing units in the cloud to which mobile IoT devices are connected. These high-capacity links meet the requirements of the upcoming 6G systems and cannot be facilitated by the current mobile communication infrastructure. Light communication, which is also denoted as LiFi, offers huge amounts of spectrum, extra security and interference-free transmission. We present the current state-of-the-art of LiFi systems and introduce new features needed for future IoT applications. We propose a distributed Multiple-Input Multiple-Output topology with a fronthaul using a plastic optical fiber. Such a system offers seamless mobility between the light access points and also to 5G, besides low latency and integrated positioning. Future LiFi development, implementation and efforts towards standardization are ad-dressed in the EU ELIoT project which is presented here.
SDN Controlled Visible Light Communication Clusters for AGVs
Eike Lyczkowski (SEW Eurodrive, Germany); Christian Sauer (SEW EURODRIVE GmbH&Co KG, Germany); Nils Brödner and Wolfgang Kiess (University of Applied Sciences Koblenz, Germany); Marco Schmidt (University of Applied Sciences Würzburg Schweinfurt, Germany)
Automated Guided Vehicles (AGVs) become increasingly important for modern industrial facilities. Communication and cooperation are central parts to their role in the flexible factory of the future. Cooperating AGVs require ultra Reliable and Low Latency Communication (uRLLC), while adhering to the strict bandwidth limitation existing in modern factories. If two or more AGVs cooperatively transport a load, they need to exchange control information for precise formation control. High latency in this exchange causes undesirable relative movement in the formation and must be minimized. The addition of a dedicated communication channel for these transmissions of latency sensitive data is proposed. In this work Visible Light Communication (VLC) was selected. The AGVs are clustered according to the cooperative tasks. This maximizes the clusters lifetime and minimizes the number of handovers between communication technologies. The SDN paradigm is used to form and maintain the VLC clusters and supply the required global knowledge.
Flexible Multiband Signal Transmission Using a Directly Modulated Laser over Photonically Generated 40 GHz
Luis Vallejo (Universitat Politecnica de Valencia, Spain); Beatriz Ortega (ITEAM Research Institute, Spain); Vicenc Almenar (Universidad Politecnica De Valencia, Spain); Dong-Nhat Nguyen, Jan Bohata and Stanislav Zvanovec (Czech Technical University in Prague, Czech Republic)
Flexible multiband signal transmission is proposed and demonstrated over photonically generated 40 GHz. The proposed scheme is based on a low cost directly modulated laser (DML) for data transmission and a Mach-Zehnder modulator (MZM) for carrier suppressed double sideband modulation as the optical frequency multiplication scheme employed for millimeter wave signal generation. Multiple bands transmission with 50 MHz 16-quadrature amplitude modulation (QAM) have been experimentally demonstrated along 10 km standard single mode fiber (SSMF) link with a total bitrate of 1.2 Gb/s under a minimum RoP of -1.1 dBm. Further experiments with each band employing different modulation formats and bandwidths show successful performance providing 200 Mb/s per band using quadrature phase shift keying (QPSK) and 16-QAM, and 150 Mb/s for 64 QAM bands, as a proof of concept towards flexible deployment of future networks, i.e. employing centralized radio access network (C-RAN) architecture.
Towards Unified Channel Equalization to Meet Transmission Requirements for Next Generation Passive Optical Networks
Hamza Hallak Elwan (Foton Lab, France); Fabienne Saliou and Gael Simon (Orange, France); Luiz Anet Neto (Imt-atlantique, France); Philippe Chanclou (Orange Labs, France)
In this paper, the challenges of next generation passive optical networks are identified, and a promising solution to mitigate them is proposed using a unified/fixed weights of channel equalization. Possible layouts of existing and future networks employ different values of data rate, wavelength range, laser chirp, and fiber length. Therefore, adaptive equalizer weights are used in order to compensate the effects of those requirements, but at the cost of increased complexity and time constrains. The originality of this paper is in utilizing a single impulse response of the equalizer through fixed weights to satisfy any network configuration and to highly simplify signal processing operations. The simulated and experimental results are in very good agreement in which bit-error-rate of 10-2 is obtained at -27 dBm received optical power.