Patent ID: 9549396
Date: 2017-01-17
CPC Classifications: H04L,H04W

Claim:
1. A method for transmitting Acknowledgement/Negative Acknowledgement (ACK/NACK) information in a wireless communication system, the method performed by a User Equipment (UE) and comprising: determining, by the UE, a Physical Uplink Control Channel (PUCCH) format and a PUCCH resource through which ACK/NACK information for downlink transmission in a downlink subframe set including M downlink subframes is to be transmitted, wherein M>1; and transmitting, by the UE, the ACK/NACK information using the PUCCH format and the PUCCH resource in one uplink subframe, wherein more than one serving cell is configured for the UE and the more than one serving cell includes one Primary Cell (PCell) and at least one Secondary Cell (SCell), wherein the ACK/NACK information is transmitted using a PUCCH format 1b, when the ACK/NACK information corresponds to one Physical Downlink Shared Channel (PDSCH) without a corresponding Physical Downlink Control Channel (PDCCH) received only on the PCell in the downlink subframe set, wherein the ACK/NACK information further corresponds to one PDSCH indicated by detection of a corresponding PDCCH having a Downlink Assignment Index (DAI) value of 1 or a Semi-Persistent Scheduling (SPS) release PDCCH having a DAI value of 1, and wherein the PUCCH resource is selected from among 3 PUCCH resources, when a number of transport blocks of the downlink transmission in the downlink subframe set is 2.