Li-Fi the Future Technology in Wireless Communication

Gadget where future technology? Researchers believe the commercial horizon at 2018.

After the presentation of the 1st smart phone Lifi at CES in Las Vegas in January 2014, this technology continues to develop. Some experts and industrialists announced 14 LED LIFI billion by 2020 (see article of December 2015 echoes). The potential revenue of the Li – Fi is estimated at 6 billion dollars U.S. research Markets and Markets in 2018 (firm).

Is this being technology really Pierce in the face of the WIFI and low range radio (Bluetooth…) technologies that are two-way?

Preamble: Lifi technology called also Li-fire or VLC for ” Visible Light Communication. ” It seems that the worries of “name brand” lead developers of this new technology to spread the initially retained term of Lifi judged too close probably by members of the consortium WiFi its direct competitor.

Power connect Internet wireless in a café or a train safely without sharing bandwidth with its neighbour. Internet broadcast in access to conference room or in a building (or meeting room) unless ‘wireless signals’ are ‘hacked’ by the neighborhood, here are some of the strengths that the promoters of the LIFI highlight.

How does the LIFI work?

Radio waves are only a part of the spectrum that can carry our data. And if we could use other waves for surfing the Internet?

The German physicist Harald Haas, has developed a solution he calls ‘data through lighting’ by sending data through an LED bulb that varies in intensity faster than the human eye. It’s the same idea as the remote control infrared, but much more powerful.

This technology is to insert a microchips in the lamp LED connected to a source of upstream collection transmission (optical fiber, CPL or DSL…).

Harald Haas wants to transmit wireless since each light bulb data: «Cleaner, greener, bright…» »

Presentation at the TED conference in August 2011 by Harald Haas (pioneer behind a new type of light bulb that can communicate as well as illuminate – access the Internet using light instead of radio waves)- video of the first global presentation of technology LIFI in August 2011

Presentation of the company pureVLC

The startup site French OLEDCOMM born from the lab of engineering of the University of Versailles Saint-Quentin, which produces, among other devices Li – Fi / VLC indoor geolocation with the support of Philips.

Most recent presentation in December 2012: Demonstration on the WEB12 of LIFI

Demo at the booth of France Television

Haas said his invention, which he called “D-Light”, can produce data rates greater than 10 megabits per second (several drivers work at 150 Mbps). He imagines a future where the data for laptops, smartphones, and tablets are transmitted by light in a room. And security would be enhanced, if you can’t see the light, you can’t access the data.

A multitude of applications are possible with this technology, since public access to Internet through streetlights to cars that communicate in their headlights. The LIFI could facilitate the data transmissions across the spectrum of the visible wireless soothing the fears of some users towards the electromagnetic waves.

LIFI technology at the service of the Smart city?

In an exploratory vision the LIFI could be used in some areas by urban public lighting, public transport (metro, trains, planes,…) but also medical or industrial environments where wireless radio communications are disrupted or dangerous

– Paradox if LIFI is energy efficient car use lighting and consumes very little ‘ extra energy-online it works only if the light is on, even weakly, but must be lit, which limit the use in public spaces.

– The LIFI has a potential for much higher theoretical transmission (x 10,000) to the wireless radio : values of light versus the electromagnetic spectrum Radio spectrum: the spectrum of visible light is 10,000 times greater than the spectrum of the airwaves by technology “LED / SIM OFDM ‘ data

– The LIFI is one-way (can’t receive that and not make the sensor of LIFI) interactivity is so impossible except by linking him with another technology (ex-CPL, WIFI…) which limits its development : A little at first (now two-way) satellite terminal technologies like or connected users objects cannot issue. It forbidden so all applications transactional or require to send streams to the networks (email sent, connection type VOIP, instant messaging, connection to a professional or personal…).

The LiFi practices are, suddenly, limited to the pure signal dissemination when no recovery is necessary. For example geolocation inside a building or for services of type broadcast (download of applications, documents, media content, view video streams HD…) by “pushing” content to a Tablet, a smartphone… in all parts of the House, in hotel rooms, in a professional place, in a commercial space, for hosting a public service or when visiting an exhibition.

– The LIFI offers an original and higher security level : the stream n ‘ is available in the “direct beams’ light has the difference of radio waves circulating less controllable way

– The LIFI is only a technology of the last meters : it requires to deploy a network of collection behind the “LED lights”, it’s a huge collection infrastructure to establish. Several tracks could pair CPL and LIFI in public lighting networks.

– The LIFI requires to change the current led compatible LIFI lamps Park : 14 billion light bulbs in the world. C’ is a huge market, but do not arrive too early or too late as with any innovation, open the reflection from the lighting of a building design, a neighbourhood, a means of transport, a public space (subway station)…!

=> In a 1st generation the LIFI could target industrial applications or specialized areas: targeted initially (train station, subway, train, tunnel, airport, airplane, hospitals, factories, museums, centers of Congress or exhibitions…).

It is not in 2014 as the wireless radio (WIFI) will be replaced by the wireless light but 5 or 10 years, this technology could complement our toolset to access ‘Wireless’ and in particular in the field of the “broadcast” of proximity (streaming very high speed in dedicated or modular spaces).

The most important industrial issue remains to convince the manufacturers of devices (smartphone, tablets, connected… objects) to equip their products base in LIFI. Without the effect of critical fleet size of terminals with the LIFI-compatible interfaces, this technology could stay confined to professional very industrial world or “niches” of highly targeted market as is the case for CPL (current carrier online) who in the early 2000s was positioned as a competitor to ADSL for home internet access. But its market has been reduced to the bare “internal distribution” buildings and including housing support or complement WIFI. The CPL could find a second wind with the massive spread of the electric smart meters as part of the “smart grid” developments (in France including 35 million meters Linky equipped in CPL in 10 years). So, the future of the LIFI is uncertain but it is a complementary technology that exists.

What made the success of WIFI is primarily its adoption by manufacturers of the devices from around the world and chipset production integrating WIFI at a low cost. It is certainly the biggest challenge for this new wireless technology!

To meet this challenge and others, the promoters of the LIFI actors are organized within the LIFI Consortium.

Consortium Li – Fi to promote this innovation

The founding members of the consortium Li – Fi are international technology companies and research institutions specialized in optical communication technologies.

The group is based on a concept developed collectively and roadmap to implement a new wireless technol

Li – fi as an alternative to the Wifi? These researchers are convinced managing to obtain a flow rate greater than 10 Gbps Wireless: 250 times faster than maximum flows available in private homes. They have for this is the choice of using light waves instead of radio waves, which works the Wifi.

Several research projects already exist in this area, in continuous or intermittent light. One of the main parameters influencing the achieved data rates and the switching frequency of the light source used.

LEDs and lasers are among the sources with higher switching frequencies, to achieve best performance of data transfer in the field, but constituting a challenge to stability at the level of the Protocol of communication between the transmitter and the receiver.

It is precisely this problem that the research activities of the project Ultra Parallel Visible Light Communications, managed jointly by the universities of Oxford, Cambridge, St Andrews and Strathclyde, and funded by the Engineering and Physical Sciences Research Council (EPSRC, engineering and physical sciences Research Council) were recently able to overcome.

Each used LED in these circumstances is capable of generating a flow rate greater than 3 Gbps, the researchers successfully pair LED 3 different and operate simultaneously to achieve the staggering rate of 10 Gbps.

some links in English on the LIFI:

TECH RADAR, 28/11/13: Li – Fi researchers smash through 10Gbit/s data barrier using LED light bulbs via hetongdiy.

THE INDEPENDENT: 28/11/13, Li – Fi revolution: internet connections using light bulbs are 250 times faster than broadband.

January 2014, first Smartphone equipped this LIFI to the these in las Vegas by the French SunPartner company:

The French company SunPartner shows the Wisyps Connect a compatible coating LiFi. The idea is simple: the coating is able to capture light for transmitting data to the smartphone, but also – the specialty of SunPartner – the device. Wysips Crystal is a photovoltaic coating that is able to transform light into energy usable by phone.

It is not a finished product, but a prototype since SunPartner use a smartphone for mid range already marketed to demonstrate Wysips® Connect. This presentation is intended to appeal to operators of mobile telephony and convince them to move to the LiFi.

The company says have signed with three manufacturers offering LIFI compatible smartphones this year 2014, with the Chinese manufacturer TCL, which offers smartphones under the Alcatel One Touch brand. The integration of the LiFi is this additional point with Wi – Fi or 4G.

Since early 2016, rumors are APPLE of intentions to install the LIFI in its smartphone. Originally a line of “IOS 9.1” code that would make reference to a “LIFI Capability”. However, from there to imagine the next smartphone of Cupertino with the LIFI firm there a universe. This passage in large public terminals type is an issue of market size for LIFI technology. Without this passage she could be confined to business applications for many years or never make that leap.

OLEDCOMM Startup French presents the LIFI in Las Vegas

below to view the video of the presentation of the LIFI by OLEDCOMM.