Patent ID: 9226276
Filing Date: 2015-12-29
Classification: H04J,H04L,H04W

Abstract:
1. A method of reporting control information in a wireless communication system in which M downlink time division duplex (TDD) subframes are associated with an uplink TDD subframe, the method comprising: selecting, by a user equipment (UE) supporting at least one cell including a primary cell, a physical uplink control channel (PUCCH) format among a plurality of PUCCH formats including a first PUCCH format and a second PUCCH format, wherein the first PUCCH format is selected if the UE receives a first physical downlink shared channel (PDSCH) in one of the M downlink TDD subframes on the primary cell, the UE receives a second PDSCH with a downlink assignment index (DAI) in one of the M downlink TDD subframes on the primary cell, the UE does not receive a first physical downlink control channel (PDCCH) corresponding to the first PDSCH on the primary cell, and the UE receives a second PDCCH corresponding to the second PDSCH; and transmitting, by the UE, a positive-acknowledgement/negative-acknowledgement (ACK/NACK) signal by using the selected PUCCH format, wherein the ACK/NACK signal is used for the first and second PDSCHs.