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Scientists Made 3Gbps Local Network Via LED Ceiling Lamps

Recently, it has been reported that researchers who are working at the Fraunhofer Heinrich Hertz Institute (HHI), Berlin, Germany, have developed a new technology named Visible Light Communication (VLC) that can turn standard ‘off-the-shelf’ Light-Emitting Diode (LED) room lights into Optical Wireless Local Area Network (OWLAN) that delivers data transmission rates of up to 3Gbps (Gigabits per second).


Fraunhofer hhi visible light communication

In 2011, a group of scientists successfully created an 800Mbps capable network using flashing LED lights. Now, the same group has successfully created new components that can achieve a transmission rate of 1Gbps per single light frequency. The transmission rate can be extended to 3Gbps as off-the-shelf LEDs typically use three light frequencies, RGB (Red, Green and Blue). Earlier, the same LEDs could only be used with a bandwidth of around 30MHz, but the latest ones have pushed this to 180MHz.

Visible Light Network

The cheap LEDs can be placed on the ceiling or in room lights and can cover around 10 meters. At that time, it will be blinking on/off at extreme fast to transmit the data (you won’t be able to see the data through naked eyes). Hence it becomes extremely useful for short-range and high-speed networks. However, HHI’s new components will be presented at FOE 2013 in Tokyo.

Source: ISPreview

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