There is proposed a mechanism by means of which information can be generated and used for estimating and identifying at each base transceiver station of a communication network the set of other base transceiver stations generating interference on certain monitored component carriers used by the base transceiver station, i.e. information for the generation of the incoming uplink background interference matrix. For this purpose, a specific communication information set, referred to as uplink radio load map, is determined which informs about an average (time/frequency) and aggregated (over all or group of served UEs) uplink load measure per component carrier. Based on the uplink radio load map received via suitable signaling from other base transceiver stations, each base transceiver station can determine the incoming uplink background interference matrix and initiate, if necessary, suitable measures for reducing interference per component carrier.