Patent ID: 9538532
Date: 2017-01-03
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method for transmitting an uplink signal by a wireless device in a wireless communication system, the method comprising: configuring, by the wireless device, a primary cell of a first Time Division Duplex Uplink-Downlink (TDD UL-DL) configuration and a secondary cell of a second TDD UL-DL configuration different from the first TDD UL-DL configuration; and for one or more downlink data on the secondary cell in subframe #n−k′ ((k′εK′), transmitting, by the wireless device, acknowledgement information about the one or more downlink data in subframe #n according to a reference TDD UL-DL configuration different from the second TDD UL-DL configuration, wherein K′ contains elements of K:{k wherein K:{k wherein D denotes a DL subframe, S denotes a special subframe and U denotes an UL subframe.