Patent ID: 9019871
Filing Date: 2015-04-28
Classification: H04B,H04L,H04W

Abstract:
1. A method for transmitting an uplink signal by a device in a wireless communication system supporting carrier aggregation, the method comprising: configuring, by the device, a secondary cell having a second Time Division Duplex Uplink-Downlink (TDD UL-DL) configuration and a primary cell different from the secondary cell and having a first TDD UL-DL configuration different from the second TDD UL-DL configuration; receiving, by the device, data within subframe #n−k′ (k′εK′) of the secondary cell; and transmitting, by the device, acknowledgement information about the data in subframe #n of the primary cell according to a reference TDD UL-DL configuration, the reference TDD UL-DL configuration being one of the first TDD UL-DL configuration or another TDD UL-DL configuration different from the first and second TDD UL-DL configurations, wherein K′ consists of a subset of elements of K: {k