A wireless device receives a sidelink (SL) downlink control information (DCI). The SL DCI indicates: one or more first frequency domain resources; one or more first time domain resources; and a periodicity. One or more SL control information (SCI) indicating the periodicity and one or more first SL transmissions is transmitted via a first set of SL resources. The first set of SL resources are determined based on the one or more first frequency domain resources and the one or more first time domain resources. One or more second SL transmissions are transmitted via a second set of SL resources determined based on: the one or more first frequency domain resources; the one or more first time domain resources; and the periodicity.