A transmitter is provided having transmission methods that minimize the power needed to ensure reliable reception in a coverage area. In one aspect, data that requires re-transmission as acknowledged mode data is re-transmitted when the power level of the transmission link is higher than a pre-determined...http://www.google.de/patents/US20080069020?utm_source=gb-gplus-sharePatent US20080069020 - Signal Transmission Method from a Local Network Node
