In accordance with an aspect of the present disclosure, a method of a user equipment is provided for controlling states of a secondary cell. The method includes receiving secondary cell (SCell) state indication information indicating a state for the SCell from a base station through an radio remote control (RRC) message or a medium access control (MAC)control element, causing a state of the SCell to transition into a dormant state when the SCell state indication information indicates the dormant state, and transmitting channel state information reporting for the SCell in the dormant state according to an dormant state CQI report period parameter set separately from an activation state CQI report period parameter.
In accordance with another aspect of the present disclosure, a method of a base station is provided for controlling states of a secondary cell of a user equipment. The method includes transmitting secondary cell (SCell) state indication information indicating a state for the SCell to the user equipment through an RRC message or a MAC control element, and when the SCell enters a dormant state according to the SCell state indication information, receiving channel state information reporting for the SCell in the dormant state according to an dormant state CQI report period parameter set separately from an activation state CQI report period parameter.