Li-Fi data transmission can be more than 10Gb/s lights will be able to access the Internet

British researchers said they have been through Li-Fi technology - LED bulb data transmission technology - achieved up to 10Gb/s of data transmission speed.

The researchers used a miniature LED bulb, which made up of three primary colors, red, green, and blue, to achieve the speed of data transmission of 3.5Gb/s. This means that the data transmission speed of more than 10Gb/s is possible. Li-Fi is an emerging technology that allows specially designed LED bulbs to provide low-cost wireless network connections almost anywhere.

Super high speed

The research project named "super parallel visible light communication engineering", by University of Edinburgh, University of St Andrews, University of Oxford and the University of Cambridge at Clyde University, to carry out joint projects, the engineering and Physical Sciences Research Council funded.

Micro LED bulb, by Clyde at university R & D, allowing light parallel injection, thereby increasing the amount of data transmission at any time. "Imagine a shower that divides water into parallel flow, which is what we do with light. Harald, professor and professor of fiber optic wireless communications at University of Edinburgh, (Harald Haas).

Using the digital modulation technique called orthogonal frequency division multiplexing, researchers can make the brightness of a micro LED bulb change millions of times per second. This allows a large number of binary data - that is, a series of data consisting of 0 and 1 - high-speed transmission.

Earlier this year, the German Institute of Hof Hertz Hertz announced that in laboratory conditions, up to 1Gb/s of data transmission speed is possible to achieve. This month, Chinese scientists have developed a microchip LED bulb, can achieve 150 Mb/s data transmission speed. One such bulb can provide a network connection for four computers.

Li-Fi Technology

In 2011, Professor Haas demonstrated how a LED bulb with signal processing technology can transmit high-definition video to a computer. He invented the term Li-Fi, and created a Private Companies PureVLC to use this technology (also known as visible light communication technology, referred to as VLC technology).

Because LED bulbs are very popular, lighting infrastructure is also in place, so Li-Fi technology is expected to be cheaper and more energy-efficient than existing wireless communication systems.

Visible light is a part of the electromagnetic spectrum, which is 10 thousand times larger than the radio spectrum. Another advantage, Professor Haas says, is that a well distributed LED transmitter can provide a more stable and localized Internet connection for the entire building. The disadvantage of the traditional Wi-Fi is that the farther you get away from it, the less you get the signal, which leads to the instability of wireless connections in the office and home.

Professor Haas also believes that because the light can not penetrate the wall, VLC technology may be more secure than the traditional Wi-Fi connection.