LIFI and WI-FI
This year's visible light wireless communication--lifi concept has continuously entered people's field of vision. Qinshang Optoelectronics has successfully developed a sample of Lifi communication mobile phone version in cooperation with Tsinghua University. Fudan University has also successfully realized the use of indoor visible light transmission network signals. LED wireless optical communication is to add a microchip to an ordinary LED bulb , so that the bulb blinks at a very fast speed, and the data can be transmitted by using the bulb, which can solve the problem that the spectrum spread of the wireless communication cannot be communicated in the limited area of ​​the microwave transmission. The problem of location services.
When LIFI comes out, many people have suggested whether it will replace the existing wireless communication method WI-FI. Compared with WI-FI, lifi has the convenience of construction - just insert a chip on the LED lamp; high bandwidth, high Rate--current laboratory test speeds up to 1 Gbps; no wall penetration capability - high information transmission security; wide range of applications - applicable to any radio sensitive environment such as aircraft, operating room, underwater, etc. Advantage.
Although the technical prospects of LIFI are widely optimistic, there are still many problems, such as reverse communication problems, how to realize two-way communication and return of signals, and currently only half of LIFI is solved; there are environmental interference and signal blocking problems and prices.
Due to LiFi's attribute limitations, it is not destined to completely replace current wireless devices. However, it can complement the coverage area of ​​WiFi. Between existing networks, by adding a new element of visible light communication, business interoperability and technology complement each other, and a perfect fusion can be formed. In a word, it is not a competitor to Wi-Fi, but a complementary technology.
However, as an emerging technology, there are still many problems to be solved in order to realize large-scale commercial applications and bring large-scale market applications.
USB 3.0 is the future and the new generation in transmission tech, with the following advantages: Super speed – It`s 10 times faster than its predecessor and backward compatible with all USB 2.0 interfaces. It uses a 9-pin connector with 4 pins compatible with USB 2.0 and another 5 pins for bi-directional data transfer.
External Differences
The USB 3.0 connector is blue.
The top 5 pins provide the two-way data transfer.
The bottom 4 pins provide backward compatibility with USB 2.0.
Note: All USB 3.0 Interfaces are blue
Usb 3.0 Cable,Usb3 Cable,3.0 Usb Port,Micro Usb 3.0 Cable
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