Method for controlling transmission of uplink control information on plurality of serving cells, and apparatus therefor

A method of a Base Station (BS) for receiving uplink control information in a plurality of serving cells, the method comprising:

• receiving, from a User Equipment (UE), M or fewer Uplink control informations (UCIs) through a Physical Uplink Control CHannel (PUCCH) of each serving cell, where M indicates a number of UCIs of available for simultaneous transmission;
• and
• determining the UCIs,
• wherein, when a number K of UCIs to be simultaneously transmitted by the UE is greater than the number M of UCIs available for simultaneous transmission, the UE selects one or less than K UCIs based on at least one of a priority set with each UCI and a Carrier Indicator Field (CIF) of a serving cell, and transmits the selected one or less than K UCIs through the PUCCH, and
• wherein the number M is less than or equal to a number N of serving cells, and the number M is greater than or equal to 1.

A User Equipment (UE) for controlling transmission of uplink control information in a plurality of serving cells, the UE comprising:

• a receiving unit configured to receive a signal from a Base Station (BS);
• a controller configured to compare a number K of UCIs to be simultaneously transmitted and a number M of UCIs available for simultaneous transmission and configured to select M UCIs from the UCIs to be simultaneously transmitted when the number K is greater than the number M;
• and
• a transmitting unit configured to transmit the selected M UCIs to the BS through a Physical Uplink Control CHannel (PUCCH) of each serving cell,
• wherein the number M is less than or equal to a number N of serving cells, and the number M is a natural number greater than or equal to 1;
• and
• wherein the controller is configured to select UCIs from the K UCIs, based on at least one of a priority set with each UCI and a Carrier Indicator Field (CIF) of a serving cell.