Methods and apparatuses for carrier aggregation with discontinuous reception is disclosed. At least two different time division duplexing configurations can be communicated from serving cells to a device, the subframes of the at least two different configurations being counted for purposes of operating at least one timer function according to a predefined rule of counting. Discontinuous communications by the serving cells with the device are controlled based on the predefined rule of counting such that at least one timer function associated with discontinuous reception from the serving cells is operated based on the counting.