10 Gbps Data Rates Achieved Using LEDs (Li-Fi)
UK researchers last month announced
they were able to achieve speeds up to 10 Gbps using LEDs. The technology, dubbed "Li-Fi," is line of sight, though some researchers have seen success with reflected light
to expand the reach of Li-Fi indoors. This week, a Chinese professor Chi Nan stated she built a Li-Fi system for about $500,000
using retail parts achieving initial speeds of 150 Mbps:
Chi's own system runs at 150 Mbps by using a small number of LED bulbs each at one watt. "With a more powerful LED light, we can reach 3.5 Gbps speeds," she added. Both the router and receiver are fitted with LED bulbs so that they can send data, and also installed with a chip that can process the signals.
While several startups
have formed promoting the technology, there's no hard date for when Li-Fi is expected to hit the market. Below, German physicist Harald Haas discusses Li-Fi in more detail during a TED talk back in 2011.
Re: A very reasonable office (indoor) solution...
said by tshirt:But it only works line of sight, which means limited to one room. Not a very usable solution for the home where most devices are in other rooms and separated by floors & walls.
... which could offload a great deal of traffic from the Wi-Fi (outdoor) solution.
| No it can be reflected to fill the room, and newer LED bulbs are addressable (to allow intensity and color control) so it could go to all the bulbs in a home , office, building, or campus AND (equally important IMHO) be restricted to some bulbs in some rooms for security purposes or so that adjacent rooms, offices, buildings or apt's don't interfere, with each other. Something WIFi does poorly, a window tint could prevent security risks if glass alone does not block it already|
| |KA3SGM- -... ...- -PremiumReviews:
West Chester, PA
Re: A very reasonable office (indoor) solution... Most newer Low-E glass would block it, as it is designed to block UV, to prevent fading of indoor fabrics, and it also blocks IR, because its the main way to obstruct heat transfer through the glass.
Newer multi-pane windows are also pressurized with Argon gas, an inert halogen, but very well known to alter the properties of light that passes through it, very similar as to what Neon, Xenon, and Krypton do as well.
ROCK 'TIL SUNSET