Si-soft's Li-fi research team

Li-fi record data transmission of 10Gbps set using LED lights

Mexican software development company Sisoft has succeeded in wirelessly transmitting internet data at 10Gbps using Visible Light Communications (VLC), a technology that can illuminate a large space, such as an office, while at the same time providing high-speed mobile internet connectivity to devices that come into range of the light spectrum.

Sisoft was able to transfer data at speeds of up to 10Gbps across a light spectrum emitted by LED lamps.

In April this year, E&T reported how Scottish researchers had achieved 1.1Gbps using the same VLC technology.

Sisoft was able to transmit audio, video and Internet data across the spectrum of light emitted by LED lamps

Light fidelity, or Li-Fi, is being touted as an alternative to Wi-Fi as it has the potential to transmit data more cheaply and securely. Li-Fi uses light waves instead of radio waves.

One advantage of Li-Fi over Wi-Fi is the difficulty in hacking the signal. Li-Fi is also put to good use installed in hospitals which use radiation apparatuses.

The Li-Fi device works by transmitting data via LEDs that emit an intermittent flicker at a speed imperceptible to the human eye.

 “Currently in Mexico the highest transfer rate is 200 megabytes per second. Just to get an idea, with Li-Fi you could quickly download an entire HD movie in just 45 seconds,” said Arturo Campos Fentanes, CEO of Sisoft.

Sisoft worked with researchers from the Autonomous Technological Institute of Mexico (ITAM) in adapting the VLC system to be able to achieve five times the original transfer speeds of 2Gbps, to 10Gbps.

Campos Fentanes explained that the first experiments were conducted with audio, in which a cable was connected from the 3.5mm audio jack of a smartphone to a protoboard tablet, transforming the audio signals to optical waves. A special emitter transmitted data across the spectrum of light generated by an LED lamp, which in turn was captured by a receptor located in a speaker that reproduced the sound.

For wireless internet transmission, the mechanics are similar. The electronic apparatus developed by Sisoft sits above the router and the light emitted by the LED lamp acts as an antenna. The apparatus has an in-built receptor for the "optical audio" signal.

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