A wireless device determines a first transmission power for a first signal starting in a first subframe and a second transmission power for a second signal starting in a second subframe. When a calculated power value is more than an allowable transmission power a power control mechanism is employed. The wireless device reduces signal transmission power during an overlap period if the first subframe and the second subframe overlap in time by less than a first duration. The wireless device drops a signal if the first subframe and the second subframe overlap in time by more than a second duration.