Systems and methods relating to Discovery Signal Measurement Timing Configuration (DMTC) are disclosed. In some embodiments, a method of operating a radio access node in a cellular communications network having a primary cell and a secondary cell, comprises sending, to a wireless device, a DMTC for one of a group consisting of: (a) the secondary cell configured for the wireless device such that the DMTC is a specific DMTC for the secondary cell; and (b) the primary cell and additional cells that are configurable as secondary cells such that the DMTC applies to both the primary cell and the additional cells when configured as secondary cells. Related radio access nodes and wireless devices are also disclosed.