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Visible Light Communication devices ready for commercialization

Visible Light Communication devices ready for commercialization
Outstanding Technology has developed two commercial products using visible light communication technology, using LED lights to transmit data. These are a location service for smartphones, called the Commulight System, and a visible light transceiver, the TR01. The Commulight System consists of a receiver that plugs into a smartphone or tablet, and LED lights with a built-in transmitter. The receiving device obtains IDs emitted by the LED lights, enabling it to download content relevant to the user's location. The receiver is available in two types, one that connects via USB, and one that connects via the headphone jack. "The most obvious application for this system is guiding visitors in galleries and museums. "Positioning services using indoor GPS and wireless communication already exist. Using light from LEDs instead of radio signals also makes it possible to communicate in tunnels and factories, where radio reception can be difficult.

LiFi Consortium Orthogonal frequency-division multiplexing Orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies. OFDM has developed into a popular scheme for wideband digital communication, whether wireless or over copper wires, used in applications such as digital television and audio broadcasting, DSL Internet access, wireless networks, powerline networks, and 4G mobile communications. Example of applications[edit] The following list is a summary of existing OFDM based standards and products. Cable[edit] Wireless[edit] The wireless LAN (WLAN) radio interfaces IEEE 802.11a, g, n, ac and HIPERLAN/2.The digital radio systems DAB/EUREKA 147, DAB+, Digital Radio Mondiale, HD Radio, T-DMB and ISDB-TSB.The terrestrial digital TV systems DVB-T and ISDB-T.The terrestrial mobile TV systems DVB-H, T-DMB, ISDB-T and MediaFLO forward link.The wireless personal area network (PAN) ultra-wideband (UWB) IEEE 802.15.3a implementation suggested by WiMedia Alliance. Key features[edit]

High-Speed Internet from the Ceiling Lamp - Fraunhofer HHI The technology developed by HHI makes it possible to use standard off-the-shelf LED room lights for data transmission. Data rates of up to 800 Mbit/s were reached by this optical WLAN under laboratory conditions, while a complete real-time system exhibited at trade fairs reached data throughput of 500 Mbit/s. The newly developed patent protected components have now achieved a transmission rate in laboratory experiments of over 1 Gbit/s per single light frequency. As off-the-shelf LEDs mainly use three light frequencies or light colors, speeds of up to 3 Gbit/s are feasible. Thus far LEDs could only be used with a bandwidth of around 30 MHz, yet the new technical components enable exploitation of a much higher bandwidth of up to 180 MHz.

Li-Fi Li-1st, the first Li-Fi equipment Li-Fi, as coined by Prof. Harald Haas during his TED Global talk,[1] is bidirectional, high speed and fully networked wireless communications, like Wi-Fi, using light. Li-Fi is a subset of optical wireless communications (OWC) and can be a complement to RF communication (Wi-Fi or Cellular network), or a replacement in contexts of data broadcasting. It is wireless and uses visible light communication or infra-red and near ultraviolet (instead of radio frequency waves), part of Optical wireless communications technology, which carries much more information, and has been proposed as a solution to the RF-bandwidth limitations.[2] A complete solution includes an industry led standardization process. Technology details[edit] Visible light communications (VLC) works by switching bulbs on and off within nanoseconds,[6] which is too quickly to be noticed by the human eye. History[edit] Standards[edit] The standard defines three PHY layers with different rates:

'Li-fi' via LED light bulb data speed breakthrough 28 October 2013Last updated at 09:10 ET By Matthew Wall Technology reporter, BBC News Micro-LEDs can transmit large amounts of digital data in parallel UK researchers say they have achieved data transmission speeds of 10Gbit/s via "li-fi" - wireless internet connectivity using light. The researchers used a micro-LED light bulb to transmit 3.5Gbit/s via each of the three primary colours - red, green, blue - that make up white light. This means over 10Gbit/s is possible. Li-fi is an emerging technology that could see specialised LED lights bulbs providing low-cost wireless internet connectivity almost everywhere. High speed The research, known as the ultra-parallel visible light communications project, is a joint venture between the universities of Edinburgh, St Andrews, Strathclyde, Oxford, and Cambridge, and funded by the Engineering and Physical Sciences Research Council. This allows large chunks of binary data - a series of ones and zeros - to be transmitted at high speed. 'Light fidelity'

LIFI – LiFire ou VLC internet par lampe LED – révolution ou utopie ? | Tactis LIFI, LiFire ou VLC où comment se connecter sans fil au net via les lampes LED avec effet wow garanti … mais pour des usages limités actuellement au broadcast. Gadget où technologie d’avenir ? Des chercheurs estiment l’horizon commercial à 2018. Après la présentation du 1er smartphone Lifi au CES de Las Vegas en janvier 2014, cette technologie poursuit son développement. par stéphane Lelux - Président de Tactis Est-ce que cette technologie mono-directionnelle percera vraiment face au WIFI et aux technologies radio faible portée (Bluetooth…) qui sont bidirectionnelles ? Pouvoir communiquer par Internet sans fil dans un café ou un train, en toute sécurité sans partager la bande passante avec son voisin. Comment le LIFI marche-t-il ? Les ondes radioélectriques ne sont qu’une partie du spectre qui peut transporter nos données. Cette technologie consiste à insérer un microchips dans la lampe LED connectée à une source de transmission de collecte amont (soit fibre optique, CPL ou DSL …).

Professor Harald Haas | TheSecurityLion A light-based wireless communication network developed by Edinburgh-based mobile communication specialist pureLiFi could become an essential tool for Government and business in combating terrorism and cyber crime. The pureLiFi system offers a new and secure way of exchanging information over networks, using light rather than radio waves to communicate between devices. The pureLiFi system offers a new and secure way of exchanging information over networks, using light rather than radio waves to communicate between devices The new light-based communication technology, known as Li-Fi, could provide a substantially increased solution to enhance data security for businesses seeking to improve data protection – from Government and defence organisations through to financial, public sector, pharmaceutical or any ‘high data risk’ industries. By exploiting specific properties of light, the Li-Fi system prevents both sides of the communications link being intercepted. Professor Harald Haas

France Top 10 Li-Fi myths | Visible Light Communications One only needs to read some of the daft comments posted at the foot of online visible light comms articles to understand that there are a large number of misconceptions out there. Here is my Li-Fi myth buster top 10. 1. The lights flicker. We subtly modulate the current supply to the LED devices at relatively high speeds. 2. There are VLC patents pending on methods to dim the LED while maintaining high data rates until the current is dimmed to about 50%. 3. VLC can be used for transmission in either direction. 4. It is relatively simple to eliminate the vast majority of interference from natural and artificial sources using optical filters (which avoids receiver saturation). 5. To use VLC the lights do need to be on. In domestic environments we do tend to switch off lights during daylight. 6. Line of sight is a definite advantage because the signal will be stronger. 7. VLC is often regarded as a disruptive technology relative to radio technology. 8. 9. 10.

Japan Exclu : le 1er smart phone compatible Li-Fi Par Bernard Fontaine, France Télévisions Editions Numériques Peut-être vous souvenez-vous de notre présentation du Li-Fi lors du Web12 avec la toute première start-up française spécialisée, Oledcomm. Depuis la techno a fait du chemin et nous sommes en mesure de vous présenter aujourd’hui le premier smart phone compatible Li-Fi qu’elle vient de mettre au point dans la région parisienne, à Vélizy. (Le li-fi est une technologie de communication sans fil qui passe par la lumière en utilisant le spectre optique. Le wi-fi utilise, lui, la partie radio du spectre électromagnétique) Il y a quelques mois pour recevoir ces données numériques il était indispensable d’ajouter au smartphone ou à la tablette un « dongle » extérieur équipé du récepteur Li-Fi. Ce terminal « no name » c'est-à-dire fabriqué à destination de marques (ici Oledcomm) est équipé d’un écran de 5 pouces d’assez bonne qualité, fabriqué en Chine. Bientôt d’autres révélations plus surprenantes sur Méta-media d’ici quelques semaines.

Allemagne

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