Method for transmitting channel state information and device therefor

A method of receiving channel state information by a base station, the method comprising:

• configuring, by the base station, carrier aggregation together with user equipment using a single primary cell and a plurality of secondary cells controlled thereby;
• transmitting a higher layer signal including configuration information for configuring a PUCCH transmission function in at least one secondary cell among the plurality of secondary cells;
• transmitting a MAC control element including activation state indication information regarding the PUCCH secondary cell having the PUCCH transmission function;
• and
• after the PUCCH secondary cell is activated according to the activation state indication information, receiving channel state information in the PUCCH secondary cell,
• wherein a secondary cell deactivation timer for deactivation of an activated secondary cell is differently applied according to whether a type of the activated secondary cell is the PUCCH secondary cell;
• and
• wherein:
• the secondary cell deactivation timer is applied when each secondary cell, except for the PUCCH secondary cell, included in a secondary PUCCH group to which the PUCCH secondary cell belongs is changed to an activated state;
• and
• the secondary cell deactivation timer is not applied when the PUCCH secondary cell is changed to an activated state,
• wherein the plurality of secondary cells except for the PUCCH secondary cell are respectively mapped to one of a primary PUCCH group and the secondary PUCCH group,
• wherein at least one secondary cell among the plurality of secondary cells, mapped to the primary PUCCH group, transmits channel state information through the primary cell, while at least one secondary cell among the plurality of secondary cells, mapped to the secondary PUCCH group, transmits channel state information through the PUCCH secondary cell,
• the secondary cell deactivation timer is configured to have a single value,
• wherein the plurality of secondary cells mapped to the primary PUCCH group and the plurality of secondary cells mapped to the secondary PUCCH group is applied the single value of the secondary cell deactivation timer, and
• wherein the PUCCH secondary cell is not applied the secondary cell deactivation timer.

User equipment transmitting channel state information, comprising:

• a controller configured to configure carrier aggregation using a single primary cell and a plurality of secondary cells controlled by a base station;
• a receiver configured to receive a higher-level signal including configuration information for configuring a PUCCH transmission function in at least one secondary cell of the plurality of secondary cells and receive a MAC control element including activation state indication information regarding a PUCCH secondary cell having the PUCCH transmission function configured based on the configuration information;
• and
• a transmitter configured to transmit channel state information in the PUCCH secondary cell after the PUCCH secondary cell is activated according to the activation state indication information,
• wherein a secondary cell deactivation timer for deactivation of an activated secondary cell is differently applied according to whether a type of the activated secondary cell is the PUCCH secondary cell;
• and
• wherein:
• the secondary cell deactivation timer is applied when each secondary cell, except for the PUCCH secondary cell, included in a secondary PUCCH group to which the PUCCH secondary cell belongs is changed to an activated state;
• and
• the secondary cell deactivation timer is not applied when the PUCCH secondary cell is changed to an activated state,
• wherein the plurality of secondary cells except for the PUCCH secondary cell are respectively mapped to one of a primary PUCCH group and the secondary PUCCH group,
• at least one secondary cell among the plurality of secondary cells, mapped to the primary PUCCH group, transmits channel state information through the primary cell, while at least one secondary cell among the plurality of secondary cells, mapped to the secondary PUCCH group, transmits channel state information through the PUCCH secondary cell,
• the secondary cell deactivation timer is configured to have a single value,
• wherein the plurality of secondary cells mapped to the primary PUCCH group and the plurality of secondary cells mapped to the secondary PUCCH group is applied the single value of the secondary cell deactivation timer, and
• wherein the PUCCH secondary cell is not applied the secondary cell deactivation timer.