Patent ID: 9699806
Date: 2017-07-04
CPC Classifications: H04L,H04W

Claim:
1. A method of retransmitting an uplink data retransmitted by a user equipment based on a signal received via a physical hybrid automatic repeat request (HARQ) indicator channel (PHICH) in a wireless communication system, the method comprising: receiving an indication on whether to detect the PHICH from an eNode B; wherein the indication on whether to detect the PHICH is performed via a modulation coding scheme (MCS) value, and wherein the MCS value is contained in an uplink grant received from the eNode B; if the received indication corresponds to an indication configured to detect the PHICH, retransmitting the uplink data based on a detection result of the PHICH, wherein the received indication corresponds to the indication configured to detect the PHICH when the MCS value is less than a prescribed numerical value; and if the received indication corresponds to an indication configured not to detect the PHICH, retransmitting the uplink data based on the uplink grant received from the eNode B, wherein the received indication corresponds to the indication configured not to detect the PHICH when the MCS value exceeds the prescribed numerical value.