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Wi-Fi devices usually provide limited bandwidth. The more users, the lower the bandwidth allocated. A busy public Wi-Fi network usually has hundreds of connections, and the available bandwidth is greatly reduced. To help solve this problem, Oregon State University researchers have invented a new system called WiFO that uses infrared LEDs to increase Wi-Fi bandwidth by a factor of 10. This system uses a combination of radio frequency (RF) and optical data links to enhance the available bandwidth. The prototype system utilizes improved LED technology to allow wireless transmission of infrared light as part of a fiber Gigabit wireless LAN.
Currently, the prototype system is capable of transmitting data at a rate of 10 MB/s per second, but LED components can only transmit data to a diameter of one meter around the receiving area. To overcome this limitation, the system uses multiple LED emitters (set at ceilings or other high points) to automatically switch while using existing wireless network radios to provide seamless coverage of a specific area.
The receiving end of this system contains simple photodiodes to accept infrared data transmissions, and the team will further develop USB port receivers for use in mobile devices or computers.
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