Without WiFi signal, a LED light will be able to access the Internet. On the 14th, School of Computer Science and Technology, Fudan University spread the good news that an international frontier communication technology that utilizes the visible light transmission network signal in the house was successfully implemented in the laboratory. Researchers will access the network signal a 1W LED lamp beads, the light of the four computers to the Internet, the maximum rate of up to 3.25G, the average Internet speed of 150M, called the world's fastest "light Internet." Next month, 10 prototypes will be unveiled at the 2013 Shanghai International Industry Fair. Visible light communication is called Lifi A shining light bulb has been painted on top of a man's head for a while to symbolize the aura of an inventor, but the German physicist Harald Haas "lit" the light bulb itself Wonderful idea: relying on a small lamp, the invisible network signal into a "visible" network signal. Haas and his team at the University of Edinburgh recently invented a patented technology that uses blinking lights to transmit digital information, a process known as Visible Light Communication (VLC), which people often call "Lifi, To show that it can bring revolutionary changes to the current wireless network transmission technology represented by WiFi. This unimaginable network technology in the end how far from us? The answer is: very close, it is from Fudan University laboratory step by step to come to us. Xue Xiangyang, a professor at the School of Computer Science and Technology at Fudan University, told reporters that the current radio signal transmission devices have many limitations. They are rare and expensive but not very efficient. For example, mobile phones and millions of base stations around the world help to enhance their signals. Most of them Energy is consumed in cooling, efficiency is only 5%. In contrast, the world's use of light bulbs is inexhaustible, especially in the domestic LED light source is a large-scale replacement of traditional incandescent lamps. Simply add a microchip to any obscure LED bulb to turn the bulb into a wireless transmitter. Visible light communication is safe and economical Last year, the Shanghai Science and Technology Commission has laid the international advanced wireless communication technology in the universities and research institutes in the city. The research and application of the key technologies of visible light communication undertaken by Fudan University have made important progress. The researchers not only make use of the laboratory environment Visible light transmission network signals, and to achieve can "drag four", that is lit a small light, 4 computers can simultaneously access the Internet, each other network signals. Researcher Professor Chi Nan pointed out that light and radio waves are all a kind of electromagnetic wave, and the basic principle of transmitting network signals is the same. In the study, an ordinary LED bulb was loaded with a microchip, which controlled millions of blinks per second, lit a representation of 1, and off represented 0. Because the frequency is too fast, the human eye can not detect at all, but the photosensitive sensor can receive these changes. In this way, binary data is quickly encoded into light signals and transmitted efficiently. Light computer, through a set of special receiving device, read the light in the "Morse code." "Where there is light, there is a network signal. Turn off the lights, the network is empty." Chi Nan told reporters later, compared with the existing WiFi, the future of visible light communication is safe and economical. WiFi relies on invisible radio wave transmission, equipment power is more and more large, local electromagnetic radiation is bound to increase; wireless signal through the wall, the network information is not secure. These security risks are "swept away" in visible light communications. Moreover, the spectrum is 10,000 times larger than the radio spectrum, meaning more bandwidth and higher speeds, and the network setup requires virtually no new infrastructure. Lifi technology also has its limitations Of course, as a new network technology and products still in the laboratory, its future potential should not be overestimated. Because, from lighting control to chip design and manufacturing and a series of key technology products, researchers are 'hands-on', to really like WiFi into the tens of thousands of households, through a series of industrial development, there is a Long way to go. "Chi Nan believes that Lifi technology itself has its limitations, such as lighting is blocked, the network signal will be cut off and so on. Therefore, it is not a competitor of WiFi, but a complement to each other, helping to release spectrum space. Its future, can produce killer apples, but also rely on people's unlimited imagination: the car rely on LED lights to "dialogue", the aircraft cabin passengers using the overhead LED reading light to access the Internet ...... Electric Sport Motorcycle,Best Electric Motorbike,Ev Motorcycle,E Moto Bike Wu Xi Mdka New Energy Technology Co., Ltd. , https://www.evmdka.com
Network signal access LED lamp beads, you can access the Internet without WiFi.
August 06, 2021