Patent ID: 8019230

Claim:
A method for providing a visible light communication in a data link layer of a visible light communication system adopting an infrared communication link connection protocol, the method comprising: broadcasting during a discovery process, by a transmitting terminal, a discovery exchange station identification (D-XID) frame to establish a communication link; generating, by a receiving terminal, a visible frame to provide a visibility to the link for a predetermined waiting time period for responding to the broadcast D-XID frame; exchanging during a connection process a set normal response mode (SNRM) frame and an unnumbered acknowledgement (UA) frame for requesting a link setting between the transmitting and receiving terminals and generating visible frames for the predetermined waiting period for receiving the SNRM frame and the UA frame; and exchanging during a normal response mode (NRM) an information transfer frame (I-frame) and a receive ready (RR) frame in response to the I-frame, between the transmitting and receiving terminals, when the link has been established and generating visible frames for the predetermined waiting period for receiving the I-frame and the RR frame.