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LED-ID SYSTEM : COVERAGE AND FAST LINK RECOVERY TECHNIQUE

Recently Light Emitting Diodes (LEDs) are considered to represent the next generation of lighting and communication technology. LED-ID (Light Emitting Diode – Identification) is one of the key technologies for identification, data transmission and illumination simultaneously. This is the new paradigm in the identification technology environment. LED-ID system typically needs line of sight (LOS) to support narrow FOV transceivers links to achieve high data rate but reduced the coverage, increase the disconnection rate of the link. Also when the receiver moves horizontally or vertically, in that case coverage also varied and LOS relies upon direct link between transmitter and receiver. Link recovery is a new challenge for reliable LED-ID system. Fast link recovery techniques are essential for the making the system robust. In this paper we discuss about the horizontal and vertical coverage variation in terms of received power and fast link recovery technique for the LED-ID system considering both LOS and NLOS reflection.