A method for operating a control node for a wireless communication system. The control node creates a data frame having at least one resource block. The data elements of the resource block are subdivided into at least a first subset and a second subset The first subset comprises first control data for controlling a receiving node The second subset comprises data elements of said resource block not used for control data for controlling said receiving node. The method further comprises checking whether second control data for a second receiving node are to be put into the second subset, scheduling payload data for the receiving node into the second subset if second control data are not to be put into the second subset of data elements, and transmitting the data frame to the receiving node.