Patent ID: 8811323

Claim:
A method of discontinuous data reception by a User Equipment (UE), in which multiple carriers are aggregated, in a mobile communication system, the method comprising: receiving scheduling information related to downlink data in a first downlink carrier among a plurality of downlink carriers; receiving the downlink data in a second downlink carrier among the plurality of downlink carriers; decoding the received downlink data; if the decoding is failed, operating a retransmission timer for receiving retransmitted downlink data; if the first downlink carrier is different from the second downlink carrier, monitoring both of the first downlink carrier and the second downlink carrier for receiving the retransmitted downlink data during an operation of the retransmission timer; and if the first downlink carrier is identical to the second downlink carrier, monitoring the first downlink carrier for receiving the retransmitted downlink data during the operation of the retransmission timer.