Internet from light bulbs: in Estonia began using light to transmit data 100 times faster Wi-Fi

7 декабря 2015 года

Internet from light bulbs: in Estonia began using light to transmit data 100 times faster Wi-Fi

Startup Velmenni began testing technology of high-speed wireless data transmission Li-Fi. The technology is already available for testing in offices and industrial areas of Tallinn. In field conditions, the transmission rate reaches 1 GB/s, 100 times the speed of standard Wi-Fi connection.

Li-Fi – a new wireless communications technology (“light” – “light” and “fidelity” – “precision”), which makes use of a cheap and reliable way to connect to a global network with special LEDs from virtually anywhere. The project, which explored innovative technology, initiated by the universities of Oxford, Cambridge and Edinburgh. And is funded by the British research Council in the field of physical Sciences and engineering.


The concept of Li-Fi in 2011 formed a Professor at the University of Edinburgh’s Harald Haas. He suggested the use of visible light communication to transmit data from the Internet and between devices. Information on Li-Fi transmit via LED-diodes that flash with imperceptible to the human eye, nanosecond frequency. Light can transmit much more information than radio waves in Wi-Fi. In the laboratory Velmenni were able to get a transfer speed of 224 GB/s, and during the tests in the office — up to 1 Gbit/s, which is an order of magnitude faster than conventional Wi-Fi.

Since Li-Fi transmits data via light, it will not be able to send them to the device behind a wall or in another room. However, a clear line of sight between the diode and the device he, too, is not necessary because light can be reflected from the walls. In this case, the device accepts the data, but at a lower rate.

In Velmenni believe that the technology Li-Fi will be available to consumers within the next three to four years. Now the main problem of the deployment of Li-Fi startup sees integration with your existing Wi-Fi networks. In the future data plan to adapt conventional bulbs in homes.