In 2011, a professor at the University of Edinburgh Harald Haas delivered a lecture on Lifi technology on TED, Lifi is based on visible light communication technology to transmit data via LED lights for a variety of network signal used by the terminal.
In addition to the University of Edinburgh, the German Fraunhofer Institute for Optical, ACEMIND project operated by another team in Europe，as well as Fudan University School of Computer Science and Technology Laboratory operations have been realized a similar technology. Currently, the pureLife in Edinburgh is the first related startups.
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The company’s first-generation product with Li-1st bidirectional transmission can be achieved within three meters, the speed can reach 5Mbps, while the lighting features of LED lights are not affected in any way. In the fourth quarter of 2014, the LiFi team pure Life developed the networking products named Li-Flame, the system make the existing bulb accessed to LiFi for the automatically bidirectional data transmission. In other words, as long as a Li-Flame, just using the LED light bulbs，you can access to the internet.
Li-Flame has two key parts. One is the Ceiling Kit, simply by a standard Ethernet port connected to LED lamps, it can form a network of small-scale multi-site switch, and can switch seamlessly between the AP (Access Point access point).The other is the desktop suite, via the USB interface connected to the user’s device, you can use infrared to upload data to the ceiling kit, the speed can reach 10Mpbs. Rechargeable Li-Flame can ensure that the connection is constantly so that enhance the mobility, when the user moves from one AP to another (such as going into another room).
As for the security issue, because the Lifi signal is mounted in a very narrow beam of light channel, it is difficult to through walls. At the same time，because the upload and download channels are separated, if a hacker attempts to attack a computer, theoretically， he must break the two-way channel.
Li-Frame is now on the sale, the main customer base is business users. Prior to forming this technology, many commercial perspective envisaged are about to switch to the construction of public facilities (such as transfomed the street into a hotspot) and enterprise network security ects. According to the official website, there is a significantly demand for the product in the first quarter of 2015.
Marketandmarkets predicted that LiFi industry will grow to $ 9 billion (about 55.926 billion yuan) at least by 2020. Haas is pretty optimistic about this new technology, because it will promote the mobile Internet network steering cell type, and create 5G era, while dramatically promote the development of the Internet of Things.
Article from http://ledindoorlighting.cn/index.php/output-value-of-led-optical-communication-product-named-lifi-available-will-reach-9-billion-in-2020/
