According to some embodiments, a method in a wireless device configured to use a first cell for wireless access network (WAN) operation comprises receiving, from a network node, an identification of a second cell that the wireless device may use for device-to-device (D2D) operation. The wireless device determines a reference cell associated with an uplink carrier used for D2D operation in the second cell. The method further comprises measuring a downlink reference signal of the reference cell, and performing one or more tasks related to D2D communication on the uplink carrier based on the measurement of the downlink reference signal.
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