Li-Fi, 100 times faster than Wi-Fi
If you still marvel at how wonderful the web is without wires through Wi-Fi, you’ll be over the moon with this new way of enjoying the internet as Li-Fi promises to be as much as 100 times faster. Li-Fi uses the visual spectrum rather than radio waves to transmit the data. Unfortunately, it’s still at the testing stage.The future
With promises of speeds of around 1GB per second, Li-Fi quite literally is the future. The basic process involves a light source (like a standard LED), an internet connection and a photo detector. When it was tested by Estonian firm Velmenni it produced speeds of 1GB per second but there was evidence that speeds of up to 224GB per second are achievable. According to reports, this technology could be used in offices all across the world in less than 4 years’ time.
How it works
The visible light spectrum is 10,000 times larger than the radio waves used for Wi-Fi which is very attractive as radio waves are in short supply. The information is encoded in pulsed light like it is in TV remote controllers. With modern LEDs you could transmit more than enough data for a standard internet connection. What’s great about this tech (apart from the massive speed gains of course) is that, unlike Wi-Fi, there’s no interference with other radio signals so this technology can be used on aeroplanes or any other place with Wi-Fi interferes. The only real drawbacks found in testing are that it can’t be used in direct light so using it outside could be a problem. The technology can’t travel through walls like radio waves either so until a work around is found for that, Li-Fi is likely to be used to supplement Wi-Fi networks in congested urban areas or places like hospitals.