Patent ID: 9172519
Filing Date: 2015-10-27
Classification: H04L

Abstract:
1. A method for transmitting an acknowledgement/not-acknowledgement (ACK/NACK) by User Equipment (UE) for which a plurality of serving cells have been configured, the method comprising: receiving data in a subframe n of a secondary cell; and transmitting an ACK/NACK signal for the data in a subframe n+k of a primary cell, wherein the primary cell uses a Frequency Division Duplex (FDD) radio frame, wherein the secondary cell uses a Time Division Duplex (TDD) radio frame, wherein k is a predetermined value, wherein uplink (UL)-downlink (DL) configuration information about the TDD radio frame used in the secondary cell is received by the UE, and wherein the UL-DL configuration information indicates any one of the UL-DL configurations shown in the table below: