Patent ID: 9531519
Filing Date: 2016-12-27
CPC Classification: H04J,H04L,H04W

Claim Text:
1. A method for transmitting an uplink signal by a communication apparatus in a wireless communication system, the method comprising: receiving data within a subframe set, on a secondary cell of a first time division duplex uplink-downlink (TDD UL-DL) configuration, wherein the subframe set includes a subframe #n-k of the secondary cell; and transmitting acknowledgement information for the data in a subframe #n on a primary cell of a second TDD UL-DL configuration, wherein the second TDD UL-DL configuration is different from the first TDD UL-DL configuration, wherein k is an element of K: {k wherein K: {k wherein, if the secondary cell is configured to be scheduled by the same cell, the specific TDD UL-DL configuration is a TDD UL-DL configuration having a smallest number of DL subframes among one or more TDD UL-DL configurations in which subframes configured as DL in the primary cell or the secondary cell are all configured as DL, and wherein, if the secondary cell is configured to be scheduled by another cell, the specific TDD UL-DL configuration is the second TDD UL-DL configuration of the primary cell, where D denotes a DL subframe, S denotes a special subframe, and U denotes a UL subframe.