Apparatus and method for wireless communication in a wireless communication network includes determining availability of a primary uplink frequency of a primary carrier and a secondary uplink frequency of a secondary carrier for uplink transmissions and determining a primary radio condition of the primary uplink frequency meets a superior condition threshold and a second radio condition of the secondary uplink frequency meets an inferior condition threshold. Aspects of the method and apparatus also include transmitting, based on determining the primary radio condition meets the superior condition threshold and the second radio condition meets the inferior condition threshold, all pending control packet data units and all pending retransmission packet data units on the primary uplink frequency. Additionally, the UE duplicates a transmission of all data from the secondary uplink frequency on the primary uplink frequency.