A transportation vehicle, a system, apparatuses, methods, and a computer programs for user equipment and a network component of a mobile communication system. The method for a first user equipment (UE) of a first mobile communication system operated by a first operator includes transmitting information related to a subsequent direct communication with second user equipment to a network component of the first mobile communication system. The second UE is assigned to a second mobile communication system operated by a second operator. The method also includes receiving information related to a coordinating network component from the first network component. The coordinating network component is a network component of the first or the second mobile communication system. The method also includes receiving information related to radio resources to use for the communication with the second UE from the coordinating network component.