Method and device for transmitting and receiving data in mobile communication system
The present specification relates to a communication method and a communication device, and a random access method of a user equipment (UE), according to one embodiment of the present specification, comprises the steps of: sensing a random access trigger in a connected state; determining the type of the random access trigger when the random access trigger is sensed; and performing congestion control if the type of the random access trigger is a preset type.
1. A method by a user equipment (UE), the method comprising:
receiving an activation command for a secondary cell (SCell) from a base station in a subframe n;
performing a radio frequency (RF) bandwidth reconfiguration based on the activation command for the SCell; and
suspending data communication on a primary cell (PCell) for a predetermined number of subframes based on the activation command for the SCell,
wherein the suspending of the data communication on the PCell begins in a subframe n+5.
2. The method of claim 1 , further comprising:
transmitting a hybrid automatic repeat request (HARQ) feedback for the activation command.
3. The method of claim 1 , if the SCell is activated based on the activation command for the SCell, further comprising at least one of:
transmitting a sounding reference signal (SRS) on the SCell; or
monitoring a physical downlink control channel (PDCCH) of the SCell.
4. The method of claim 1 , after the activation command for the SCell is received, further comprising at least one of:
starting a timer of a deactivation for the SCell; or
transmitting a channel quality indicator (CQI) for the SCell.
5. The method of claim 1 , wherein the suspending of the data communication on the PCell is caused if the PCell and the SCell belong to a same frequency band.
6. The method of claim 1 , wherein the RF bandwidth reconfiguration is performed if the SCell is activated based on the activation command for the SCell.
7. The method of claim 6 , if the SCell was previously activated before the activation command for the SCell is received, further comprising at least one of:
starting a timer of a SCell deactivation for the SCell;
transmitting a channel quality indicator (CQI) for the SCell;
monitoring a physical downlink control channel (PDCCH) of the SCell; and
triggering a power headroom (PHR) report.
8. A user equipment (UE), the UE comprising:
a transceiver configured to transmit and receive signals; and
a controller configured to:
receive an activation command for a secondary cell (SCell) from a base station in a subframe n;
perform a radio frequency (RF) bandwidth reconfiguration based on the activation command for the SCell; and
suspend data communication on a primary cell (PCell) for a predetermined number of subframes based on the activation command for the SCell,
wherein the suspending of the data communication on the PCell begins in a subframe n+5.
9. The UE of claim 8 , wherein the controller is further configured to:
transmit a hybrid automatic repeat request (HARQ) feedback for the activation command.
10. The UE of claim 8 , wherein the controller is further configured to:
transmit a sounding reference signal (SRS) on the SCell and monitor a physical downlink control channel (PDCCH) of the SCell, if the SCell is activated based on the activation command for the SCell.
11. The UE of claim 8 , wherein the controller is further configured to:
start a timer of a deactivation for the SCell and transmit a channel quality indicator (CQI) for the SCell, after the activation command for the SCell is received.
12. The UE of claim 8 , wherein the suspending of the data communication on the PCell is caused if the PCell and the SCell belong to a same frequency band.
13. The UE of claim 8 , wherein the RF bandwidth reconfiguration is performed if the SCell is activated based on the activation command for the SCell.
14. The UE of claim 13 , wherein the controller is further configured to:
start a timer of a SCell deactivation for the SCell;
transmit a channel quality indicator (CQI) for the SCell;
monitor a physical downlink control channel (PDCCH) of the SCell; and
trigger a power headroom (PHR) report, if the SCell was previously activated before the activation command for the SCell is received.