This invention relates to the zonal transmission of data by radio means and optionally by optical means through the modulation of light from common building light fixtures, including the light output of fluorescent, mercury vapor, and other arc or discharge lamps and fixtures; a system for the reuse...http://www.google.es/patents/US7352972?utm_source=gb-gplus-sharePatente US7352972 - Method and apparatus for the zonal transmission of data using building lighting fixtures
Method and apparatus for the zonal transmission of data using building ...
