Turn on the Internet can be visible light communication is expected next year industrialization

This year, the U.S. eavesdropping incident caused a great uproar in the world, network and communications privacy and security issues of concern. Is there a communication technology that can transmit confidential information more securely? State Key Laboratory of mobile communications experts located in Jiangning Development Zone Chinese wireless Valley said that the recent rise of the visible light communication technology can do, next year based on equipment of this technology is expected in the industry in Jiangning development zone.

The scientific community has studied "visible light communication" for more than and 10 years

No WIFI signal, lit a LED lamp will be able to access the internet. This unimaginable communication technology is not far away from us. National mobile communications research laboratory, Southeast University professor Zhang Zaichen introduction, "visible light communication technology" is not a mystery, the principle is the combination of semiconductor lighting technology and communication technology, using the characteristics of LED light source rapidly changing luminous intensity, the modulation of information to LED lights, can be in the local information transmission light. Visible light communication technology is also known as "LIFI".

As early as 1999, scholars in Hongkong and Japan made a systematic study on the visible light communication technology. Zhang Zaichen said that by 2009, with the gradual popularization of LED lighting, the technology once again into people's vision, and has been rapid development.

Safe and cheap, good prospects for application

In the State Key Laboratory of mobile communications in East China, the reporter saw a computer is playing high-definition video. Researchers will be high-definition video signal coding for the visible light signal, light in another computer receiving end, the display on the display of the same video content.

Compared with the existing wireless communication, visible light communication security. Zhang Zaichen introduction, radio signal through the wall, it is difficult to ensure the safety of information transmission. In the visible light communication, these security risks become nowhere to hide. For example, pull the curtain, the outside world can not receive the information in the light, confidentiality than radio communication, so visible light communication can be applied to military and national security and other special areas.

In addition, an ordinary LED lamp slightly transformation is equivalent to a small base station, in the premise of the popularity of LED lighting, visible light communication network construction costs greatly reduced. Zhang Zaichen said that it is because of the excellent security and low cost, visible light communication can not only be used for indoor wireless access, but also for intelligent transportation and positioning system to provide a new method.

Complementary with WIFI, is expected next year industrialization

However, Zhang Zaichen also pointed out that the "visible light communication technology currently has many limitations, such as blocking the light data will be interrupted, to make this technology into thousands of households like WIFI, there is a long way to go. Visible light communication is not an alternative to the existing wireless communication technology, but more complementary to each other.

It is reported that, a number of key technologies involved in visible light communications research and development is progressing smoothly, based on the application of the technology is expected to achieve industrialization in Jiangning Development Zone next year.