The disclosure relates to methods of operating a first wireless terminal providing network communication with a radio access network using a network carrier and providing sidelink communications using a sidelink carrier. A scheduling grant may be received from the radio access network using a network subframe of the network carrier. First and second time measurements relating to the sidelink carrier and the network carrier respectively may be obtained. Responsive to the scheduling grant, the first time measurement, and the second time measurement, a communication sidelink subframe of the sidelink carrier may be selected to be used for a sidelink communication.