Abstract: At least one remote station communicates with a base station in a fixed wireless communication network. Data is transmitted in a series of short duration data frames, at any of at least four discrete transmission power levels selected for that data frame, and using any of at least four modulation-coding levels selected for that data frame. When the amount of data being transmitted in that data frame requires the highest adequate modulation-coding level as determined by received signal quality information including signal-to-interference-and-noise ratio, data is transmitted at the highest optimal power level. When the amount of data being transmitted in that data frame requires less than the highest adequate modulation-coding level, data is transmitted at a lower modulation-coding level sufficient to transmit the amount of data for that frame and at a correspondingly reduced power level.