Patent ID: 9736858
Date: 2017-08-15
CPC Classifications: H04L,H04W

Claim:
1. A method for performing a data retransmission by a user equipment (UE) in a wireless communication system, the method comprising: configuring, by the UE, a first cell and a second cell having different subframe patterns, wherein every downlink (DL) subframe of the first cell has only a basic set of hybrid automatic repeat request acknowledgement (HARQ-ACK) resources, and the second cell includes a first uplink (UL) subframe associated with the basic set of HARQ-ACK resources and a second UL subframe associated with an additional set of HARQ-ACK resources; transmitting, by the UE, data via the second cell based on a UL grant of the first cell; and retransmitting, by the UE, the data according to control information of the first cell, wherein the data is retransmitted using at least one of a non-adaptive retransmission procedure or an adaptive retransmission procedure when the data is transmitted in the first UL subframe of the second cell, and wherein the data is retransmitted using only the adaptive retransmission procedure when the data is transmitted in the second UL subframe of the second cell.