Patent ID: 6643469
Filing Date: 2003-11-04
Classification: H04B,H04J,H04L,Y02D

Abstract:
Method for wireless optical communication between a transmitting station and a receiving station, wherebysaid transmitting station provides a Request-to-Send (RTS) frame to said receiving station to announce the transmission of a data frame, said receiving station provides a Clear-to-Send (CTS) frame to said transmitting station in case of correct reception of the Request-to-Send (RTS) frame, and said transmitting station subsequently sends a data frame at a nominal transmission power level to the receiving station, said Request-to-Send (RTS) frame comprising a Preamble field (PA), a Synchronization field (SYNC), a Robust Header field (RH), a Source Address/Destination Address field (SA/DA), and a Cyclic Redundancy Check field (CRC), said Request-to-Send (RTS) frame being transmitted at a first optical power level and said Robust Header field (RH) being repetition coded using a first Rate Reduction, whereby eithersaid first optical power level is higher than said nominal transmission power level and said first Rate Reduction is lower than a maximum Rate Reduction (RR), or said first optical power level is lower than said nominal transmission power level and said first Rate Reduction is equal to said maximum Rate Reduction (RR).