Patent ID: 9419762
Filing Date: 2016-08-16
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A method for transmitting an uplink (UL) signal by a user equipment (UE) in a wireless communication system supporting carrier aggregation, the UE being configured with a plurality of cells including a first cell and a second cell, the first cell and the second cell operating in time division duplex (TDD) and having different TDD uplink-downlink (UL-DL) configurations, the method comprising: receiving, by the UE, at least one downlink signal in at least one DL subframe of the first cell; and transmitting, by the UE, a control signal in a UL subframe of the second cell in response to reception of the at least one downlink signal, wherein a relationship between the at least one DL subframe of the first cell and the UL subframe of the second cell is determined according to a TDD UL-DL configuration having a smallest number of DL subframes from among one or more TDD UL-DL configurations in which each subframe configured as a DL subframe on the first cell or the second cell is configured as a DL subframe.