The invention is related to an apparatus comprising: a receiver configured to receive a channel quality indication matrix; a processor configured to repeat, until the channel quality indication matrix is empty except for selected scheduling results, the following procedure: selecting a column of the channel quality indication matrix having the smallest number of non-zero channel quality indicators; searching for a largest channel quality indicator in the selected column of the channel quality indication matrix; selecting the searched largest channel quality indicator as a scheduling result, and emptying the column and row of the channel quality indication matrix corresponding to the selected scheduling result except for the selected scheduling result.