In this post I will introduce the LiFi technology
What is LiFi?
An abbreviation of the term and the closest meaning to this term is (working according to lighting or dependence on light), and in the practical sense of this technology is the transmission of data through light. It is a high-speed optical wireless communication technology that relies on visible light as a means of transmitting data instead of traditional radio frequencies (WiFi).
Features:
Security: The process of transferring data using Li-Fi technology is confined to the space that the light reaches, and therefore will not be leaked outside, and this will miss the opportunity for hackers and spies to gain access to devices and phones to steal data, as this does not depend on radio waves like other existing technologies, but It relies on visible light waves, and this makes controlling and directing them very easy, unlike radio waves that cannot be controlled in any way, as they are everywhere!
Some may consider this feature as a defect in this technology, as the process of transmitting data will be limited only to a limited place, but the spread of light bulbs everywhere, one will not feel a limitation in this new technology!
Speed: One of the most important advantages offered by Li-Fi technology is the tremendous speed in transmitting data, as the technology depends on visible light waves, and it is known that visible light waves have a frequency greater than the frequency of radio waves by 10,000 times.
Costs: With Li-Fi technology, we will not need more wires, connections and cables, and we will not need to build new towers and stations, because we already have the “infrastructure” for this technology, which is the electric lamps, which are estimated at billions of lamps, so we can Consider each lamp as a stand-alone booster!
Jamming: Li-Fi technology does not interfere with navigation devices and sensitive medical and industrial devices, as do radio-wave communication technologies, and therefore using Li-Fi optical technology, the Internet can be used via phones, laptops and tablets in hospitals, planes, factories, and even facilities Sensitive industrial such as: petrochemical plants, in which “disasters” may occur in the event of radio waves, so Li-Fi technology is the most appropriate in such cases!
The advantages can be expressed through the following points:
Vacant Spectrum spectra: The most distinguishing feature of this technology is that it does not depend on radio spectrum. You should know my dear brother that there is a problem that is growing day by day, which is that there is no longer a vacancy in the radio spectrum that is currently used and the difficulty of managing these spectra to the extent that this problem is called a spectra crisis.
It will allow wireless services to enter places where the use of wireless is prohibited because of its interference with some sensitive devices such as hospitals, planes, military facilities...etc.
The light spectra are 10,000 times wider than the radio spectra, allowing huge amounts of data to be transmitted at even faster speeds.
The presence of the infrastructure for this technology in advance (electricity), it is present everywhere, and what you lack is only an LED lamp that carries a receiver and a transmitter.
Energy saving in both homes and appliances, LED is a real energy saver compared to other wireless receivers.
The low price of LED lamps is cheap and has a long practical life.
Radiation pollution As LED is safe, it is only light.
It is available almost everywhere, as the lighting is everywhere. Almost no place is devoid of lighting.
Security As the data will be confined between walls when receiving it, there is no room for it to leak.
Li-Fi is the future:
The spread of wireless communications that depend on radio waves is increasing dramatically, and with it the spread of devices that transmit and receive data over the Internet through mobile networks or through Wi-Fi networks, and all the numbers and statistics indicate an unprecedented increase in the amount of data as a natural result of the increase in the number of mobile devices that It has the ability to connect to the Internet and send and receive data, as well as the increasing prevalence of smart phones connected to the Internet and its advanced features such as: making video phone calls, and easy access to social sites.
All these reasons and more eventually led to what we see now of the unprecedented increase in data consumption, and thus increase the pressure on the current wireless networks, and here emerge temporary solutions represented in the expansion and upgrade of wireless networks, but these solutions did not meet the requirements, and they are still The current wireless networks are unable to cope with this huge amount of data, so the only way out of this problem is to use new methods that have not yet been used to transmit data, and light can contribute to solving this problem because it provides a spectrum of magnetic frequencies 10,000 times greater than radio waves on which Wi-Fi technology depends.
The method of work:
The basic principle of this technology depends on the spectrum width (Board of spectrum) of the light.
Here what is meant is the width of the frequencies, as the bandwidth of the light is 10,000 times greater than the bandwidth of Wi-Fi, allowing for a very wide bandwidth that can be taken advantage of. Do this with the LEDs but not any LEDs as the LEDs should be exactly!!! The reason for this is that the LED lighting is originally flickering at very high rates, as our eyes do not perceive this flickering, and this flickering benefits by creating a so-called Binary Code, i.e. 0 and 1, which is the original form of data in computers...
Also, this technology does not generate any radiation, as in Wi-Fi, it is in the end light. The lamps must be lit in order to be able to connect to the network, but this does not constitute a major obstacle. For example, companies and factories traditionally use lamps during the work period, as well as homes use lighting during the night, but despite that, you do not have to light these lamps during the day, Because these lamps can reduce their brightness so that they cannot be noticed, yet the data transmission process continues, but at a lower speed. In all cases, the place must be well lit. The better the lighting, the faster the data transfer speed, and the lower the light, the lower the speed.
We will not need lamps of a special type, we will only need to integrate a small chip inside the lamp to transmit data, and therefore we will need to replace the existing lamps with white-light LED lamps that carry these chips, which are not expensive as their price is no different from the price of ordinary lamps! Sunlight or any other light source will not interfere with the data transmission process, because these technologies rely on chips that filter and filter to ensure that the transmission of data is not affected, and therefore the presence of any additional light sources does not have any impact on the data transmission process.
Thanks
