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German geniuses hit 800Mbps with light bulb WLAN
Last year, Chinese scientists showed off some new old-school tech, transmitting data with blue LEDs that flicker faster than the human eye can perceive. This throwback to the good ol' days of IR receivers was able to hit speeds of 2Mbps, but leave it to the fine folks at the Heinrich Hertz Institute to push the light bulb networking tech to the extremes. Earlier this year researchers hit 500Mbps with white LEDs; now, using a combination of white, green, blue, and red, the team ramped that up to 800Mbps, officially putting Ethernet on notice. The line-of-sight networking won't actually replace your standard Cat 5 line or WiFi router, but it could find a home in places like hospitals where radio-based wireless technology can cause problems for sensitive equipment. With any luck, we'll soon be bathing our homes in HD-streaming illumination.
Chinese scientists demonstrate 2Mbps internet connection over LED
LED data transmission used to be all the rage -- we fondly remember beaming Palm Pilot contacts via IrDA. Then we got omni-directional Bluetooth and building-penetrating WiFi, and put all that caveman stuff behind us. But now, scientists the world over are looking to bring back line-of-sight networking, and the latest demonstration has Chinese researchers streaming video to a laptop with naught but ceiling-mounted blue LEDs. The Chinese Academy of Sciences claims to have realized a 2Mbit per second internet connection that transmits data simply by modulating the flicker of the little diodes, and imperceptibly enough to have them serve as room lighting as well. Like Boston University before them, the Chinese scholars see short-range LED networks controlling smart appliances. It's not quite the gigabit speed you'd get from laser diodes, but this way you'll get more mileage out of those expensive new bulbs, eh?
Light bulb networks could be the next WiFi
If researchers at Boston University's College of Engineering have their way, light bulbs of the future may be the highway your data gets carried along. A team at the school is working on low-power LEDs which could utilize an optical communication system to carry data wirelessly. Using a technique which rapidly switches the LEDs on and off data transmissions could be made via imperceptible -- yet undoubtedly brain-scrambling -- flickering patterns, and each light would be its own network entry point at speeds of 1 to 10Mbps. The concept is more secure than current RF techniques because it requires linked devices be in line-of-sight, and the technology would draw far less energy than conventional radios. Says professor Thomas Little, "Imagine if your computer, iPhone, TV, radio and thermostat could all communicate with you when you walked in a room just by flipping the wall light switch and without the usual cluster of wires." Yes... and talk about you behind your back. And plot your "accidental" death after taking out a large life insurance policy on you. You won't get away with this LED network! [Thanks, Travis]
