Method for transmitting channel state information and device therefor
Provided are a method and a device for transmitting channel state information by using a PUCCH of an SCell when providing carrier aggregation (CA) or dual connectivity (DC) in a E-UTRAN. The method may include: configuring a carrier aggregation by using one primary cell (PCell) and a plurality of secondary cells (SCells) controlled by a base station; receiving an upper layer signaling including configuration information for configuring a physical uplink control channel (PUCCH) transmission function in at least one cell among the plurality of secondary cells; receiving, by using the configuration information, a MAC control element in which activation state indication information for a PUCCH SCell having an uplink control channel transmission function is included; and transmitting channel state information on the PUCCH SCell after the PUCCH SCell is activated according to the activation state indication information.
1. A method of transmitting channel state information by user equipment that configures carrier aggregation, the method comprising:
configuring carrier aggregation using a single primary cell and a plurality of secondary cells controlled by a base station;
receiving a higher layer signal including configuration information for configuring a physical uplink control channel (PUCCH) transmission function in at least one secondary cell among the plurality of secondary cells;
receiving a medium access control (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
after the PUCCH secondary cell is activated according to the activation state indication information, transmitting 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.
2. The method according to claim 1 , wherein the higher layer signal includes information regarding the at least one secondary cell mapped to the secondary PUCCH group.
3. The method according to claim 1 , wherein, when the PUCCH secondary cell is in a deactivated state, at least one secondary cell among the plurality of secondary cells, transmitting channel state information through the PUCCH secondary cell, is configured to be in a deactivated state.
4. The method of claim 1 , wherein the PUCCH secondary cell activated according to the activation state indication information is changed to a deactivated state according to an MAC control element including deactivation state indication information.
5. 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.
6. The method according to claim 5 , wherein the higher layer signal includes information regarding the at least one secondary cell mapped to the secondary PUCCH group.
7. The method according to claim 5 , wherein, when the PUCCH secondary cell is in a deactivated state, at least one secondary cell among the plurality of secondary cells, transmitting channel state information through the PUCCH secondary cell, is configured to be in a deactivated state.
8. The method of claim 5 , wherein the PUCCH secondary cell activated according to the activation state indication information is changed to a deactivated state according to an MAC control element including deactivation state indication information.
9. 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.
10. The user equipment according to claim 9 , wherein the higher layer signal includes information regarding the at least one secondary cell mapped to the secondary PUCCH group.
11. The user equipment according to claim 9 , wherein, when the PUCCH secondary cell is in a deactivated state, at least one secondary cell among the plurality of secondary cells, transmitting channel state information through the PUCCH secondary cell, is configured to be in a deactivated state.
12. The user equipment of claim 9 , wherein the PUCCH secondary cell activated according to the activation state indication information is changed to a deactivated state according to an MAC control element including deactivation state indication information.