METHOD OF PROVIDING FEEDBACK ON ACK/NACK MESSAGE DURING CARRIER AGGREGATION, BASE STATION, AND USER APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a method of feeding back ACK/NACK information for carrier aggregation, and to provide a base station and a user apparatus.SOLUTION: A method of feeding back ACK/NACK information for carrier aggregation includes: step 11 of constituting a common field preset in downlink control information (DCI) as at least one type of a command field related to ACK/NACK feedback by at least two types of a command field related to the ACK/NACK feedback, and constituting the common field as a command field related to the ACK/NACK feedback; and step 12 of transmitting the DCI to a user apparatus so that the user apparatus feeds back ACK/NACK information according to the DCI.SELECTED DRAWING: Figure 1