In the future, without the wifi signal, the visible light communication technology that can access the high-speed Internet through the green lighting LED lamp, the network speed is more than 100 times faster than the traditional network, and it takes only 0.2 seconds to download the 1G movie. As a pilot city, Chongqing is currently in the integration stage of technological breakthroughs.
Yesterday, the reporter learned at the signing ceremony of China's visible light communication industry technology innovation alliance (funding) and China's industry, academia, research and investment financing alliance, in the future, without the wifi signal, the high-speed Internet access visible light communication technology through green lighting LED lights will give people's lives. Bringing major changes, the network speed is more than 100 times faster than the traditional network, and it takes only 0.2 seconds to download 1G movies.
At the signing ceremony, Chongqing is a pilot city for the promotion and application of visible light technology. Silian Broadcasting and Television Group will undertake the research and development and application of visible light positioning and navigation in coal mines, and is currently in the integration stage of technical research.
At least five years after entering the ordinary family, Yan Jiangxing, director of the National Digital Switching System Engineering Technology Research Center, said that light and radio waves are electromagnetic waves, and the basic principles of transmitting network signals are consistent. Therefore, as long as a chip is added to the LED bulb, the bulb becomes a wireless network transmitter, which can control millions of flicker per second. Since the frequency is too fast, the human eye is not aware of it, and the photosensor can receive these. Change, this kind of flashing is actually an open and close process, which quickly encodes the binary data of 0 and 1 into a light signal through the flicker frequency and transmits it effectively. Therefore, the light has a wireless router, a communication base station, a WiFi access point or even a GPS function, and the computer under the light can receive the signal through a set of special receiving devices to access the Internet. At present, the technology is limited to the industrial and commercial fields in application, and it takes at least five years to enter the ordinary family. As for the price, because it has not yet reached the stage of industrialization, the current lighting Internet is expensive.
It is expected to play a role in the downhole of the cabin. If visible light communication enters our lives, what impact will it have on our lives?
Yan Jiangxing said that the use of visible light communication technology can easily build a home broadband integrated information service system. Through the ordinary household power line, the TV signal can be sent to the ceiling lamp, received by the visible light set-top box, and played on the TV.
Visible light communication can also be combined with existing wireless networks, such as wifi and mobile networks, to form an interactive network. For example, Qi Jiangxing can use the technology to screen potential advertisements. For example, when watching a TV series, I think that the heroine’s clothes are particularly good-looking, so I can directly scan the TV with my mobile phone, and the potential advertising information will appear. Tell you where to buy this dress, how much, etc.
For example, nowadays, everyone has several savings cards in their hands. Once they are lost, they are very troublesome. In the future, you don’t need a physical savings card to use this technology. You only need to use the mobile phone LED lights to connect with the LED lights on the ATM, you can complete the withdrawal. Deposit function.
Qi Jiangxing also introduced that with the deepening of communication functions, the shape of the lights will also undergo major changes. Our coffee tables, dining tables and furniture may become practical lamps and high-speed wireless access points. Also on the street, the technology can be used for traffic control or broadcasting public information such as weather and news. For example, if a car is equipped with LED headlights or LED taillights, the road condition information can be exchanged according to this to prevent or reduce accidents. Traffic lights can also be used. Communicate with the car. In addition, this technology can also function in places where it is not desirable or possible to use a radio transmission network, such as a cabin, a hospital, or a well.
Can not and will not replace the traditional network. Jiang Jiangxing said that China's 863 program began to deploy visible light communication technology research in 2011. After more than two years of scientific research, it has achieved a number of important aspects in modulation bandwidth expansion, real-time transmission rate, and converged network architecture. Research results, at present, China's basic research and practical application of visible light communication is at the same starting line with foreign developed countries.
Although visible light communication has many advantages, such as the absence of electromagnetic interference, it is harmless to the human body, but it does not and does not have to completely replace the traditional wired network and wireless communication, it just provides a new way of wireless communication. It is conceivable that in the near future, we can watch TV at home when we turn on the lights, and can turn on the lights to access the Internet at high speed. With lights, we can share high-speed information between digital devices, and get rid of the current situation that mobile is not high-speed and broadband is not convenient. Yan Jiangxing said.
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