Patent ID: 9515758
Filing Date: 2016-12-06
CPC Classification: H04J,H04L,H04W

Claim Text:
1. A method by a terminal connected with a base station through a primary cell (PCell) operating in a time division duplex (TDD) mode and a secondary cell (SCell) operating in a frequency division duplex (FDD) mode, the method comprising: monitoring a physical downlink control channel (PDCCH) or enhanced PDCCH (ePDCCH) on the SCell; receiving data on the SCell in a first subframe from the base station according to scheduling information in the PDCCH or in the ePDCCH; and transmitting a hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback on the PCell in a second subframe to the base station, using a physical uplink control channel (PUCCH) format 3 or a PUCCH format 1b with channel selection, wherein the PUCCH format 3 or the PUCCH format 1b with channel selection is selected for the HARQ-ACK feedback based on a TDD UL-DL configuration configured for the PCell, and wherein the PUCCH format 3 is selected for the HARQ-ACK feedback if a predetermined TDD UL-DL configuration is configured for the PCell.