Wi-Fi is becoming increasingly more present on all sides. From homes and workplaces to public spaces like shopping malls, stations of transportation and even the streets of many cities. But one of the problems that is facing, among many, the limitations of the spectrum using, each time more demanded for different uses.
In order to solve that and other problems relationships with Wi-Fi are different universities and companies that are working on the development of the Li-Fi. The idea is as simple as using ordinary light to transmit data. But look at that point is the development of this technology, thanks to the show that one could witness During MWC in the Scottish company pureLiFi.
Visible Light Communications (VLC) or Li-Fi wants to be the future technology to transmit data at short distance, with the aim of replacing so present and extended Wi-Fi. Its operation is so simple that only we need some LED bulbs that go off and light fast light changes are not visible to our eyes In addition to the receiving computer.
Is also not only a light bulb, I connect to the Internet
For the emission of the signal it is necessary to install a modulator with LED bulbs, daily most popular bulbs to be changed signal to transmit data. By the receiving device we need a photodiode receiver such as other transmitters so that two-way communication can be established.
There are several advantages of the use of visible light for data transmission. The first is that interference with other communications problem, there is no since all current electronic devices use much lower frequencies. In addition anywhere we can find bulbs, indoors or outdoors, and its adaptation to LiFi it would be very economic.
But it is that in addition to its cheaper implementation and use of a non-saturated spectrum the LiFi would also be a more secure method of transmission. Its short range, which can provide a light bulb, makes this technology a securely transmit data, having to sit in the same beam light someone who want to meddle in the communication between transmitter and receiver.
The challenge of integrating Li-Fi on different devices
But obviously there are drawbacks and disadvantages. The LiFi, for a long time that bring already under investigation, still offers quite limited speeds. Currently only pureLiFi has managed to transmit to a maximum of 13 Mbps of descent in real environments. True also that from the same company assured us that laboratory tests have managed to reach speeds of “hundreds of megabytes”, noting some studies that the theoretical limit would be at 800 Mbps of download.
Another added problem, which we have already mentioned in part as an advantage, is its short range. The maximum distance between the transmitter and receiver so that the transmission can be minimally stable estimated about 10 meters, while taking into account that indoors we could count on so many issuers of LiFi as bulbs have not seem a big deal. Also the transmission would be cut to interpose an object in the beam of light, but the truth is that shows that we are witnessing were required several seconds of interception for connection were to be cut completely.
But without a doubt the biggest problem that currently the LiFi technology is the integration of recipients on different devices. Receivers that we could show these days were both bulky and heavy. The receiver used in a laptop with a 15 inch screen mating magnetically to the back of the screen, occupy throughout the entire screen and with a width of about ten centimeters, more a small box where the photodiodes were located. The connection to the PC is performed via USB.
Still in early development
Now the challenge that is pureLiFi as all the companies that are trying to bet on this technology is to drastically reduce the receiver, so that you can integrate into smartphones, tablets, laptops and other devices. By pureLiFi they could not find us date to overcome this challenge, pointing to that I will still have to wait a few years.
Therefore, seen in a real environment the possibilities that it may provide the LiFi truth is that we were eager to see how this technology evolves. The advantages over WiFi are there, but there are also several obstacles still remaining to be overcome to get to should unseat the current King of communications over short distances.