The combination of LED and IoT, or LiFi will be used in the field of information security and the wisdom of the city

LiFi at first glance like WiFi's relatives, but in fact he is a visible light communication (VLC) a, using a fluorescent lamp or LED light as a signal source, between the source and receiver of communication to transmit messages, with high bandwidth and high security, many countries take these advantages to develop the technology.

Among them, the India Ministry of Communications (MeitY) is now with the Indian Institutet of Technology (ITT) and India PHILPS company LiFi technology research, hope can be complemented with the optical fiber network, the technology for optical fiber network but electricity area, and used in the hospital or diving equipment. According to their research, within a range of 1 kilometers, the speed of LiFi can reach 10GB per second.

The network education research department of the Ministry of communication and information (ERNET) director general manager Neena Pahuja said, LiFi is available in the wisdom of the city, these communications will become India's major infrastructure construction, but also hope that these equipment can be combined with the Internet of things (IoT), and LED lighting connection.

ERNET has previously with ITT and India PHILPS in the laboratory, and this technology will soon enter the outdoor test stage, Pahuja pointed out that after the new technology will be in India science India Polytechnic Institute of Bangalore (IISc) outdoor test.

LiFi is a professor at the University of Edinburgh Harold Haas launched in 2010, according to the report, LiFi can simultaneously complete high-speed Internet access and lighting two functions. Although he has high transmission speed and high security advantages, but as long as the light is blocked or blocked, the signal will be interrupted.

Pahuja said that LiFi cannot penetrate walls, need unobstructed space to transmit signals, is widely used in the market there is a distance. We think the LED lamp (mesh of LED lights network) is a solution. India Jawaharlal Nehru Center for advanced scientific research (JNCASR) researchers also agreed to this plan, the laboratory professor KS Narayan said that although the walls can reflect light, but the signal will be weakened, we can use more light to maintain the signal source.

The new field of information security and research LiFi

JNCASR is currently working to improve the security of LiFi, in the hope that we can improve the network security in the future smart city. The researchers coated with fluorescent powder on the wall (fluorescent) and phosphorescent paint (phosphorescent piant), the coating will absorb light and increase noise, can limit the application range of LiFi.

But in the absorption of light, phosphorescent paint can continue to shine in the light is turned off, this phenomenon also opens up a new field of study, Narayan pointed out that if the phosphorescent paint emits light as a signal source, this means that even if the phosphorescence can also turn off the lights, the hours of signal.

The French company Oledcomm LiFi products in the 2014 CES exhibition, to the high-speed transmission of information to the naked eye not to feel the pulse flash. VLNCommLi-Fi LEDLED108Mbps253MbpsLumiStick516 (text: LEDinside Daisy)

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