PDCCH monitoring regardless of DRX configuration

1. A method for a user equipment (UE) to operate in a wireless communication system, the method comprising:

receiving Discontinuous Reception (DRX) configuration information from a network;

receiving other configuration information for ignoring the DRX configuration information and monitoring a Physical Downlink Control Channel (PDCCH) from the network;

transmitting a specific indication; and

ignoring the DRX configuration information and monitoring the PDCCH after the transmitting the specific indication,

wherein the other configuration information comprises:

criteria for the specific indication, and

a time period for the ignoring the DRX configuration information and the monitoring the PDCCH.

2. The method of claim 1 , wherein the monitoring the PDCCH is performed during a specified period of time in addition to an active time according to the DRX configuration information.

3. The method of claim 1 , wherein the specific indication comprises a measurement report.

4. The method of claim 1 , wherein the ignoring the DRX configuration information and the monitoring the PDCCH are performed only after transmitting a measurement report triggered by a specific type of neighbor cell.

5. The method of claim 4 , wherein the specific type of neighbor cell is configured by the network through a Radio Resource Control (RRC) signal.

6. The method of claim 1 , wherein the ignoring the DRX configuration information and the monitoring the PDCCH are performed only after transmitting a measurement report triggered by at least one specific measurement object.

7. The method of claim 6 , wherein the at least one specific measurement object is configured by the network through a Radio Resource Control (RRC) signal.

8. The method of claim 1 , wherein the ignoring the DRX configuration information and the monitoring the PDCCH are performed only after transmitting a measurement report to a specific type of serving cell.

9. The method of claim 8 , wherein the specific type of serving cell is configured by the network through a Radio Resource Control (RRC).

10. The method of claim 1 , wherein the ignoring the DRX configuration information and the monitoring the PDCCH are performed only after transmitting a measurement report triggered by a specific type of neighbor cell to a specific type of serving cell.

11. The method of claim 10 , wherein the specific type of neighbor cell and the specific type of serving cell are configured by the network through a Radio Resource Control (RRC) signal.

12. The method of claim 1 , wherein the ignoring the DRX configuration infoitnation and the monitoring the PDCCH are performed only after transmitting a measurement report triggered by a specific measurement report triggering event.

13. The method of claim 1 , wherein the DRX configuration information is for an on-duration timer, a DRX inactivity timer, and a DRX retransmission timer.

14. A user equipment (UE) for operating in a wireless communication system, the UE comprising:

a transceiver configured to receive Discontinuous Reception (DRX) configuration information, and other configuration information for ignoring the DRX configuration information and monitoring a Physical Downlink Control Channel (PDCCH) from a network; and

a processor connected to the transceiver,

wherein the processor is configured to:

control the transceiver to transmit a specific indication, and

ignore the DRX configuration information and monitor the PDCCH after the transceiver transmits the specific indication,

wherein the other configuration information comprises:

criteria for the specific indication, and

a time period for the ignoring the DRX configuration information and the monitoring the PDCCH.