Patent ID: 9363687
Filing Date: 2016-06-07
CPC Classification: H04L,H04W

Claim Text:
1. A method for transmitting acknowledgement/not-acknowledgement (ACK/NACK) of a user equipment in a wireless communication system, the method comprising: receiving uplink-downlink (UL-DL) configuration information for a plurality of subframes of a secondary cell via a primary cell; receiving data in at least one subframe among the plurality of subframes of the secondary cell; configuring an ACK/NACK for the received data; and transmitting the ACK/NACK through a UL subframe of the primary cell, wherein the plurality of subframes of the secondary cell correspond to the UL subframe of the primary cell, wherein each of the plurality of subframes is any one of a flexible subframe and a default DL subframe fixed to a DL subframe, and the flexible subframe is a subframe that can be configured as a UL subframe or a DL subframe by the UL-DL configuration information, wherein an ACK/NACK payload size indicating an information bit size of the ACK/NACK is determined on the basis of the number of default DL subframes, the number of flexible subframes, and a transmission mode of the plurality of subframes, wherein the primary cell uses a frequency division duplex (FDD) frame and the secondary cell uses a time division duplex (TDD) frame, wherein the primary cell which uses the FDD frame is aggregated with the secondary cell which uses the TDD frame, and wherein the receiving UL-DL configuration information includes receiving the UL-DL configuration for the plurality of subframes of the secondary cell which uses the TDD frame via the primary cell which uses the FDD frame.