Patent ID: 9602263
Date: 2017-03-21
CPC Classifications: H04L,H04W

Claim:
1. A method for transmitting an ACK/NACK (acknowledgement/negative-ACK) signal by a first user equipment (UE) to a base station (BS) in a wireless communication system supporting a direct communication between the first UE and another UE, the method comprising: receiving, by the first UE from the BS, first data, wherein ACK/NACK information for the first data is configured to be transmitted in a first subframe; receiving, by the first UE from the BS, second data, wherein ACK/NACK information for the second data is configured to be transmitted in a second subframe different from the first subframe; when the direct communication between the first UE and the another UE is configured in the first subframe, transmitting, by the first UE to the BS, group ACK/NACK information for the first data and the second data in the second subframe; and when the direct communication between the first UE and the another UE is not configured in the first subframe, transmitting, by the first UE to the BS, the ACK/NACK information for the first data in the first subframe.