In Wi-Fi and LTE could be an alternative – Li-Fi technology is used to transmit the data source of illumination. How involved in this Alexander Graham Bell, the light efficient than radio waves, and when the support Li-Fi will appear in the iPhone – in “Gazety.Ru” material.
The term Li-Fi, or «light fidelity», first introduced by the German physicist Harald Haas in 2011, showing an LED lamp that can be used as a router, a signal is heard.
Li-Fi technology belongs to VLC (Visible Light Communication) – a so-called regard for visible light, allowing the light source in addition to its direct functions also to transmit information. In fact, it dates back to 1880 thanks to the scientist Alexander Graham Bell, who created Photobackground – a device that is able to transmit sounds with light in the distance.
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Li-Fi transmits the information via LED-light-emitting diodes which flicker at the nanosecond level, the process makes invisible to the human eye.
In 2011, scientists were able to achieve a speed of 224 GB / s. This would allow the user to download 18 films up to 1.5 GB each for one second,
but talking about the commercial use of Li-Fi is not.
The technology operates only in a short range, which means that the user needs to be close to the signal source. Despite the lack in terms of distance, it is also a plus – Li-Fi more secure from hacking.
Light does not pass through the wall and makes the technology attractive in terms of information security, for example, for office use. So, for breaking Li-Fi-network hacker must be in close proximity to the light source, and in such a situation would be difficult to maintain their anonymity.
In 2011, Li-Fi was still in the concept stage, the startup pureLiFi, created by Harald Haas, continues to develop.
US research firm Grand View Research predicted that
technology market data transmission using light, including Li-Fi, to reach $ 100 billion by 2024.
In autumn 2016 it became known that in Paris opened its first office in the world, equipped with technology of Li-Fi. Achieve result was due to the cooperation of the company and pureLiFi Lucibel, dedicated to LED lighting.
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“This project will be the first of its kind. It uses two-way data communication using Li-Fi technology. Man will be able to participate in the conference call on Skype, moving from one light source to another, but the connection is not interrupted, “- he said in an interview with director of business strategy pureLiFi Nikola Serafimovski.
Paris clearly claims to be the world’s Li-Fi-capital – in October Oledcomm French company won the bid to equip 66 stations of the Paris Metro 250 thousand LED light sources.. However, in this case, the technology will not provide two-way communication for example Wi-Fi, and will broadcast information about the location of specific objects, possibly trains in tunnels.
In January 2016 before the release of iPhone 7 in the code of the new version of the iOS operating system has been discovered about the test data transmission technology using light emitting Li-Fi.
If the new smartphone from Apple will be supported by advanced technology, it will be a real breakthrough in the field and contribute to its mass distribution worldwide.
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Not to be expected that the new technology completely replace Wi-Fi – most likely, they will work together.
Li-Fi will be useless on the street, so that public Wi-Fi-spots continue to function. In addition, Wi-Fi so tightly integrated into modern society, that to replace the entire nationwide wireless standard overnight would be too difficult and expensive.
technology creator Harald Haas is a future in which the light and the internet will distribute an ordinary light bulb.
“All you need to do is to integrate a small microchip in each light source and as a result we get a device that will perform simultaneously two basic functions – lighting and data transmission”, – he says.
According to him, in the long term will not only 14 billion light bulbs in the world, but 14 billion of potential sources of Li-Fi-signal, which will provide mankind vivid and bright future.