Secondary carrier activation/deactivation method and apparatus for mobile communication system supporting carrier aggregation
A method for activating/deactivating secondary carriers of a User Equipment (UE) in a mobile communication system supporting carrier aggregation is provided. The method comprises, receiving a control message including an activation/deactivation Control Element (CE) in a first sub-frame from a Base station, identifying an activation command or a deactivation command of at least one secondary carrier based on the control message, determining whether a current sub-frame is a second sub-frame or not, performing at least one first operation for the at least one secondary carrier in a second sub-frame, and performing, when the activation/deactivation CE indicates deactivation of the at least one secondary carrier, at least one second operation for the at least one secondary carrier no later than the second sub-frame.
1. A method for activating/deactivating at least one secondary carrier of a terminal in a mobile communication system supporting carrier aggregation, the method comprising:
identifying, when information associated with secondary carrier control is received from a base station, an activation command or a deactivation command of the at least one secondary carrier in the information associated with secondary carrier control;
executing, when the information associated with secondary carrier control indicates the activation command of the at least one secondary carrier, at least one of channel state information report, physical downlink control channel monitoring on secondary carriers, and sounding reference signal transmission in a first sub-frame; and
executing, when the information associated with secondary carrier control indicates the deactivation command of at least one secondary carrier, at least one of physical downlink control channel monitoring termination on secondary carriers and sounding reference signal transmission termination no later than the first sub-frame and a channel state information report termination in the first sub-frame.
2. The method of claim 1 , wherein a difference of sub-frames between the first sub-frame and a sub-frame of reception the information associated with secondary carrier control is 8.
3. The method of claim 1 , wherein the channel state information comprises at least one of a channel quality indicator, a precoding matrix index, a rank indicator, and a precoder type indicator.
4. A User Equipment (UE) for controlling activation/deactivation of at least one secondary carrier in a mobile communication system supporting carrier aggregation, the UE comprising:
a transceiver for transmitting and receiving signals with a base station; and
a controller configured to identify, when information associated with secondary carrier control is received from a base station, an activation command or a deactivation command of the at least one secondary carrier in the information associated with secondary carrier control, execute, when the information indicates the activation command of the at least one secondary carrier, at least one of channel state information report, physical downlink control channel monitoring on secondary carriers, and sounding reference signal transmission in a first sub-frame, and execute, when the information indicates the deactivation command of at least one secondary carrier, at least one of physical downlink control channel monitoring termination on secondary carriers and sounding reference signal transmission termination no later than the first sub-frame and a channel state information report termination in the first sub-frame.
5. The terminal of claim 4 , wherein the time difference between the first sub-frame and a sub-frame of reception the information associated with secondary carrier control is 8 sub-frames.
6. The UE of claim 4 , wherein the channel state information comprises at least one of a channel quality indicator, a precoding matrix index, a rank indicator, and a precoder type indicator.
7. A method for activating/deactivating at least one secondary carrier of a terminal in a mobile communication system supporting carrier aggregation, the method comprising:
identifying, when information associated with secondary carrier control is received from a base station, carriers to be activated or deactivated;
determining, when the information indicates a secondary carrier deactivation command, a first time point; and
executing, no later than the first time point, at least one of physical downlink control channel monitoring termination on secondary carriers and sounding reference signal transmission termination.
8. The method of claim 7 , further comprising:
when the first time point arrives, executing a channel state information report termination.
9. The UE of claim 7 , wherein 8 sub-frames elapse until the first sub-frame.
10. A User Equipment (UE) for controlling activation/deactivation of at least one secondary carrier in a mobile communication system supporting carrier aggregation, the UE comprising:
a transceiver for transmitting and receiving signals with a base station; and
a controller configured to identify, when information associated with secondary carrier control is received from a base station, at least one secondary carrier to be deactivated in the information associated with secondary carrier control, determine a first sub-frame, and execute, no later than the first sub-frame, at least one of physical downlink control channel monitoring termination on secondary carriers and sounding reference signal transmission termination.
11. The UE of claim 10 , wherein the control performs a channel state information report termination at the first sub-frame.
12. The UE of claim 10 , wherein 8 sub-frames elapse until the first sub-frame.