A method, in a user equipment , for performing one or more radio measurements, the method comprising: determining that the user equipment is to perform one or more radio measurements using a first set of reference time resources on at least a first cell operating on a first carrier frequency, the first set of reference time resources comprising at least one of: downlink subframe number 0 or downlink subframe number 5 per radio frame; downlink subframes containing discovery signals; and at least one downlink subframe and uplink subframe per radio frame for UE Rx-Tx time difference measurement; and adaptively performing reference signal carrier-based switching, based on the determined first set of reference time resources, for transmitting a reference signal on a second cell operating on a second carrier frequency, wherein adaptively performing reference signal carrier-based switching, based on the determined first set of reference time resources, for transmitting a reference signal on a second cell operating on a second carrier frequency comprises adapting a reference signal carrier-based switching configuration, characterized in that adapting the reference signal carrier-based switching configuration comprises adapting one or more of: a reference signal switching period; a number or set of carriers involved in reference signal carrier based switching; a sequence in which carriers are switched; reference signal switching loop length; time-to-stay on carrier during reference signal carrier based switching; minimum or maximum time before reference signal transmission on the second carrier frequency when the user equipment switches to the second carrier frequency; and minimum or maximum time after reference signal transmission on the second carrier frequency when the user equipment switches from the second carrier frequency. determining that the user equipment is to perform one or more radio measurements using a first set of reference time resources on at least a first cell operating on a first carrier frequency, the first set of reference time resources comprising at least one of: downlink subframe number 0 or downlink subframe number 5 per radio frame; downlink subframes containing discovery signals; and at least one downlink subframe and uplink subframe per radio frame for UE Rx-Tx time difference measurement; and adaptively performing reference signal carrier-based switching, based on the determined first set of reference time resources, for transmitting a reference signal on a second cell operating on a second carrier frequency, wherein adaptively performing reference signal carrier-based switching, based on the determined first set of reference time resources, for transmitting a reference signal on a second cell operating on a second carrier frequency comprises adapting a reference signal carrier-based switching configuration, characterized in that adapting the reference signal carrier-based switching configuration comprises adapting one or more of: a reference signal switching period; a number or set of carriers involved in reference signal carrier based switching; a sequence in which carriers are switched; reference signal switching loop length; time-to-stay on carrier during reference signal carrier based switching; minimum or maximum time before reference signal transmission on the second carrier frequency when the user equipment switches to the second carrier frequency; and minimum or maximum time after reference signal transmission on the second carrier frequency when the user equipment switches from the second carrier frequency. <EOS>