A method for retransmitting data when data transmission/reception has failed in a wireless LAN system using visible light communication. A mobile node searches a received frame for a fast feedback slot allocated for retransmission information when momentary data transmission/reception failure has occurred....http://www.google.com.tw/patents/US8149812?utm_source=gb-gplus-share專利 US8149812 - Method and apparatus for retransmitting data in wireless LAN system using visible light communication
