Patent ID: 8750104

Claim:
A method of transmitting an acknowledgment/non-acknowledgment (ACK/NACK) of a receiver in a wireless communication system, the method comprising: sharing information on an ACK/NACK transmission time including information on an ACK/NACK delay time with a transmitter through aperiodic signaling when multimedia broadcast multicast service (MBMS) occurs, MBMS being a service for transmitting common data packets to a plurality of user equipments (UEs); receiving a receiver-specific data packet from the transmitter; and transmitting an ACK/NACK for the receiver-specific data packet to the transmitter based on the information on the ACK/NACK delay time, wherein the information on the ACK/NACK delay time indicates a delay for a pre-configured time ranging from a transmission time of the receiver-specific data packet to a transmission time of the ACK/NACK with respect to the receiver-specific data packet to avoid a collision between the common data packets of the MBMS and the ACK/NACK with respect to the receiver-specific data packet.