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Slower Wi-Fi to contend with lightning speed Li-Fi
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CONNECTING your smartphone to the web with just a lamp — that is the promise of Li-Fi, featuring Internet access 100 times faster than Wi-Fi with revolutionary wireless technology.
French startup Oledcomm demonstrated the technology at the Mobile World Congress, the world’s biggest mobile fair, in Barcelona. As soon as a smartphone was placed under an office lamp, it started playing a video.
The big advantage of Li-Fi, short for “light fidelity,” is its lightning speed.
Laboratory tests have shown theoretical speeds of over 200Gbps — fast enough to “download the equivalent of 23 DVDs in one second,” said Suat Topsu, the founder and head of Oledcomm.
“Li-Fi allows speeds that are 100 times faster than Wi-Fi” which uses radio waves to transmit data, he added.
The technology uses the frequencies generated by LED bulbs — which flicker on and off imperceptibly thousands of times a second — to beam information through the air, leading it to be dubbed the “digital equivalent of Morse Code.”
It started making its way out of laboratories in 2015 to be tested in everyday settings in France, a Li-Fi pioneer, such as museums and shopping malls. It has also seen test runs in Belgium, Estonia and India.
Dutch medical equipment and lighting group Philips is said to be interested in the technology and Apple may integrate it in its next smartphone, the iPhone 7, due out at the end of the year, according to tech media.
With analysts predicting the number of objects that are connected to the Internet soaring to 50 million by 2020 and the spectrum for radio waves used by Wi-Fi in short supply, Li-Fi offers a viable alternative, according to its promoters.
“We are going to connect our coffee machine, our washing machine, our tooth brush. But you can’t have more than 10 objects connected in Bluetooth or Wi-Fi without interference,” said Topsu.
Deepak Solanki, founder and CEO of Estonian firm Velmenni which tested Li-Fi in an industrial space last year, said he expected that “two years down the line the technology can be commercialized and people can see its use at different levels.”
Still lab tech
Analysts said it was still hard to say if Li-Fi will become the new Wi-Fi.
“It is still a laboratory technology,” said Frederic Sarrat, an analyst at PricewaterhouseCoopers.
Much will depend on how Wi-Fi evolves in the future, said Gartner chief analyst Jim Tully.
“Wi-Fi has shown a capability to continuously increase its communication speed with each successive generation of the technology,” he said.
Li-Fi has its drawbacks — it only works if a smartphone or other device is placed directly in the light and it cannot travel through walls.
This restricts its use to smaller spaces, but Tully said this could limit the risk of data theft.
“Unlike Wi-Fi, Li-Fi can potentially be directed and beamed at a particular user in order to enhance the privacy of transmissions,” he said.
Li-Fi backers say it would be ideal in places where Wi-Fi is restricted to some areas such as schools and hospitals.
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