Patent ID: 10057037

Abstract:
A method is provided for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information at a User Equipment (UE) in a wireless communication system. The UE determines whether a transmission of a scheduling request is configured in one uplink subframe in which ACK/NACK information for downlink transmissions is to be transmitted, when a Physical Uplink Control Channel (PUCCH) format 3 is configured for a transmission of the ACK/NACK information, and transmits the ACK/NACK information using a PUCCH format 1a/1b and a PUCCH resource. If the transmission of the ACK/NACK information coincides with the one uplink subframe for the transmission of the scheduling request, the UE transmits ACK/NACK information and the scheduling request in the one uplink subframe by using the PUCCH format 1a/1b, when the ACK/NACK information corresponds only to a Physical Downlink Shared Channel (PDSCH) received only on a Primary Cell (PCell).