The present disclosure relates to a scheduling apparatus (109) for reducing interference in a cellular radio communication system (110). The apparatus comprises a processor. The processor is configured for obtaining an indication that direct (D2D) wireless communication should be set up between a first wireless communication terminal and a second wireless communication terminal of the communication system. The processor is also configured for measuring at least one metric of the communication system, said measurement indicating a risk of interference of signalling from the second terminal to the first terminal. The processor is also configured for allocating, based on said measurement, a first set of frequency and/or time resources (f/t resources) for D2D transmissions from the first terminal to the second terminal. The first set of f/t resources defines a first amount of signalling. The processor is also configured for allocating, based on said measurement, a second set of f/t resources for D2D transmissions from the second terminal to the first terminal. The second set of f/t resources defines a second amount of signalling. The second amount of signalling is less than the first amount of signalling.