subject: United States-based LED intelligent lighting locked optical wireless network - intelligent lighting, the United States - smart home industry [print this page] United States-based LED intelligent lighting locked optical wireless network - intelligent lighting, the United States - smart home industry
HC intelligent home network Funded by the U.S. government a "smart lighting" initiative to explore the wireless communication capability embedded into the future installation of LED lighting to provide a wider range of access points.
This investment 185 million U.S. dollars, and a 10-year U.S. National Science Foundation program involves more than 30 university researchers, which included Boston University, Rensselaer Polytechnic in New York and New Mexico in the United States State University of New Mexico in central cities.
The initiative to explore the beam can be seen using the radio equipment and LED-based lighting devices communication. LED-based programs can also be used for LED applications in the growing number of cars to communicate between. The goal is to build communications capacity among all the LED lighting at the same time, reduce the RF frequency band of the crowding
"To communicate using infrared light has a long history of IRDA Infrared Data Association many years ago has PDA, printers and laptops built communication protocols," said Boston University professor ThomasLittle. "We are now doing is to seize this opportunity to embed networking capability into LED lighting innovation. With incandescent and fluorescent lamps are replaced, we hope to networking technology embedded into LED lighting."
Present infrared LED's, LED-based communications features such as remote control, would be suitable for use visible light to digital devices in the transceiver can communicate with lighting equipment. The lighting equipment will be connected to the Internet via cable. Contact must be shared between all users of spectrum, based on the WiFi access point RF is different from the line of sight communications via visible light could allow different data streams can be fed into each device.
Researchers with different modulation schemes have been carried out experiments, including the use of standard binary code, not zero encoders, pulse code modulation and pulse density modulation of the various encoders. They claim that these programs as long as the data rate is higher than 900KHz, the work of each case may not feel the light flashes.
Next year will show the speed of the initial prototype for the second 1-10Mbits, it will use the latest LED and the light-emitting diodes to handle transmission and reception. The researchers also plan to develop the end transceivers can be made visible a new semiconductor technology.
"As an integral part of the system, we need receivers usually made of light-emitting diode," a program is "to adopt the same only with the anti-bias of the LED, and, in effect, as a component manufacturing process parts makes the LED part of a receiver, while the other as a transmitter, "Little said.
The group will also experiment with a variety of light wavelengths, to form white light using different colors of light on a number of encoded data streams. Light polarization also will be the use of visible light to the focus of multiple communication strategies.
Boston University will focus on system-level issues, including computer networking application development. Semiconductor device development from Rensselaer Polytechnic and the University of New Mexico researchers have to solve.
Boston University has established a publishing initiative on the intelligent lighting transmission sites.
