Abstract: This invention relates to a method and apparatus for transmitting data in a radio communication system. The apparatus comprises a data segmenter (203) segmenting data into data segments. The data segments are fed to a transmission encoder (205) which encodes the data segments into transmission blocks in accordance with a transmission scheme selected from a transmission protocol comprising of a plurality of transmission schemes having different energy per information hit levels. The transmission blocks are transmitted by transmitter (211) and feedback information is received from the remote radio station (216) by a receiver (217). An analysis processor (219) determines an analysis group of data segments such that the analysis group comprises at least two data segements having transmission blocks encoded with a different energy per information bit levels. The analysis processor (219) further generates a performance distribution measure relating to the analysis group in response to the feedback information.