Patent ID: 9276691
Filing Date: 2016-03-01
CPC Classification: H04J,H04L,H04W

Claim Text:
1. A method for transmitting control channel from a terminal to a base station in a wireless communication system supporting carrier aggregation, the method comprising: receiving, at the terminal, information on a primary cell operating in a Frequency Division Duplexing (FDD) mode and a secondary cell operating in a Time Division Duplexing (TDD) mode; receiving, at the terminal, downlink scheduling information for downlink data; receiving, at the terminal, the downlink data in a first subframe according to the downlink scheduling information; and transmitting, at the terminal, control information corresponding to the downlink data on the primary cell, wherein the control information is transmitted using a physical uplink control channel (PUCCH) format determined based on a type of the first subframe of the secondary cell.