Recently, indoor LED lighting can be considered for constructing green infra with energy saving and additionally
providing LED-IT convergence services such as visible light communication (VLC) based location awareness and
navigation services. For example, in case of large complex shopping mall, location awareness to navigate the destination
is very important issue. However, the conventional navigation using GPS is not working indoors. Alternative location
service based on WLAN has a problem that the position accuracy is low. For example, it is difficult to estimate the
height exactly. If the position error of the height is greater than the height between floors, it may cause big problem.
Therefore, conventional navigation is inappropriate for indoor navigation. Alternative possible solution for indoor
navigation is VLC based location awareness scheme. Because indoor LED infra will be definitely equipped for providing
lighting functionality, indoor LED lighting has a possibility to provide relatively high accuracy of position estimation
combined with VLC technology. In this paper, we provide a new VLC based positioning system using visible LED lights
and image sensors. Our system uses location of image sensor lens and location of reception plane. By using more than
two image sensor, we can determine transmitter position less than 1m position error. Through simulation, we verify the
validity of the proposed VLC based new positioning system using visible LED light and image sensors.
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