Patent ID: 9025542
Filing Date: 2015-05-05
Classification: H04L,H04W

Abstract:
1. A method of transmitting acknowledgement (ACK)/negative ACK (NACK) at a user equipment (UE) in a state of an ACK/NACK repetition mode in a wireless communication system, the method comprising: receiving, by the UE, first data through a first downlink (DL) subframe; receiving, by the UE, second data through a second DL subframe; transmitting one or more repetitive ACK/NACK signals for the first data in one or more uplink (UL) subframes; and transmitting, by the UE, one or more repetitive ACK/NACK signals for the second data in one or more UL subframes, wherein, if an interval between the first DL subframe and the second DL subframe is less than a predetermined length, a number of repetitive transmission times of the one or more repetitive ACK/NACK signals for the second data is reduced, and wherein, if one of the one or more repetitive ACK/NACK signals for the first data and one of the one or more repetitive ACK/NACK signals for the second data are scheduled to be transmitted in a same UL subframe, transmission of a corresponding one of the one or more repetitive ACK/NACK signals for the first data is dropped at the UL subframe.