The current situation of the development of Li-Fi technology and the future trend of decryption

Have a great influence on the use of Wi-Fi mobile computing, so that employees can access the company network in any place, coffee shops can also become independent staff office. But Wi-Fi also has its disadvantages, so the birth of a new standard: Li-Fi, if it can be successfully listed, will be able to fill the blank of Wi-Fi technology.

The problem is that Wi-Fi signal coverage is small, especially in the face of the wall, but also easy to be hijacked by hackers. Although in recent years, the bandwidth is increased, but when too many people visit Wi-Fi at the same time, the speed is very easy to slow down.

Adding more Wi-Fi most is a part of the solution. It can not solve the security problem, only part of the solution to the scalability problem.

Li-Fi or visible light wireless communication, which is a kind of emerging wireless protocol, using the visible spectrum to provide wireless network access. The Li-Fi transmitter using LED lights to adjust the light intensity, are beyond the scope of our eyes can be perceived, and is a photosensitive receiver for data read. Because LED has used chip to control its output, so that they can be modulated up to millions of times per second, the theory of data transmission speed can be 100 times faster than Wi-Fi.

But Li-Fi is not to replace Wi-Fi, but a supplement. Whether we use the intelligent mobile phone, tablet computer or notebook computer, there will exist at the same time, it takes a special receiver and transmitter to send and receive Li-Fi signals. It requires a special encoder / decoder chip to convert the optical signal into data.

Li-Fi is still an ongoing technology, but its inventor said, IEEE is considered to be included in the Wi-Fi standard 802.11. "The general lighting light emitting diode (LED) is introduced for the visible spectrum for wireless communication is the growing interest of." But the standard is still seeking feedback mechanism of its members. IDC mobile device technology and trend of the project manager Will Stofega said, "it is difficult to obtain accreditation standards." "There are always ecosystem and political interests, I always feel that takes a lot of work, but Li-Wi is an alternative to the most promising connection technology."

Stofega warns, will cause any vested interest on potential threats to their income and technology have doubts and fears. Like some 4G vendors because of its dominant market position and threats against the 5G, so Li-Fi may also face opposition. He said: "one must say Li-Fi is a bad idea in the Wi-Fi forum."

Wireless spectrum resource

The use of optical transmission data and not what happens; the TV remote control is such a mode of operation. But the infrared remote control use, the distance and transmission capacity is restricted.

University of Edinburgh Mobile chairman and pureLi-Fi co founder / chief scientific officer Harald professor Haas Li-Fi is presented for the first time in 2011, the company tried to put Li-Fi into the market.

Haas said that the wireless spectrum resource and inspired him to create Li-Fi. Haas has been engaged in the work of 4G in SIEMENS company. He is aware of the wireless spectrum is not enough for the multimedia era. Since then, he developed the world's first Li-Fi wireless transmitter, and in cooperation with the French manufacturer of Lucibel lighting, made the first fully integrated Li-Fi lighting, and was demonstrated at this year's mobile world congress.

He said: "today's Li-Fi is like Wi-Fi fifteen years ago, and in five to ten years, Li-Fi would like Wi-Fi everywhere."

CISCO enterprise network group senior vice president of Engineering Anand Oswal said that CISCO Li-Fi is a very exciting emerging technology, has great potential. CISCO's strategy is to establish Li-Fi technology development, the final product, but he added: "we are still in the exploratory stage, CISCO has not on Li-Fi products and solutions to make any decision."

A potential field is the integration of CISCO digital construction plan, which is a set of solutions, with PHILPS, Microchip, CREE and Molex suppliers, using CISCO's power over Ethernet (PoE) and general Ethernet (UPoE) innovation, provide electric lighting system for enterprises.

Oswal said: "every light is converted to a wireless communication medium ability in the enterprise, is the future trend of this solution. CISCO is working with partners to explore how technology will be seamlessly integrated into the wireless infrastructure in CISCO. "This will make the Li-Fi technology has a leading Wi-Fi field for decades of innovation."

Energy control and IoT solutions provider EMC president and CEO Jerry Johnson said, Li-Fi is very interested in the retailers, they will be regarded as a substitute for the potential of Bluetooth beacon technology. He also saw the government, airport and commercial space and building owners interest, they hope to use Wi-Fi or Li-Fi in the meeting room.

EMC plans to become a nationwide Li-Fi lighting dealer, and has to be deployed in 80 test sites.

He said: "I think there will be a combination of Li-Fi and Wi-Fi, Li-Fi occupies a dominant position." "Li-Fi will greatly improve the overall network bandwidth, speed and reliability, not to mention improve communication ability."

Some companies are tested on Li-Fi, but now they did not disclose the related information of foreign. He added that EMC's own research shows that Li-Fi transmission data can be 100 times faster than the traditional Wi-Fi.

How Li-Fi works

The key difference between conventional LED lamp and support Li-Fi bulb is Li-Fi bulb driving circuit for transmitting and receiving radio signals, using different intensities of light log