A cellular network supports radio communication based on a first configuration which organizes a time-frequency space in first resource elements and radio communication based on a second configuration which organizes the time-frequency space in second resource elements and assigns at least one of the second resource elements to a utilization which is in conflict with the radio communication based on the first configuration. A node (100-A) of the cellular network sends an indication (20) to a communication device (10-A, 10-B). The indication (20) comprises time domain and/or frequency domain information for defining a pattern comprising at least one of the first resource elements which is to be disregarded by the communication device (10-A, 10-B) when performing radio communication with the cellular network based on the first configuration and/or the second configuration. The at least one first resource element of the pattern defines a first part of the time-frequency space which overlaps a second part of the time-frequency space defined by the at least one of the second resource elements.