Patent ID: 8042018

Claim:
A method for transmitting an ACKnowledgement/Negative ACKnowledgement (ACK/NACK) signal to support a retransmission of packet data received from a Node B in a User Equipment (UE) in a Frequency Division Multiple Access (FDMA) wireless communication system, the method comprising: generating an ACK/NACK signal for received packet data; determining whether the UE is set to support ACK/NACK repetition; if the UE is not set to support ACK/NACK repetition, transmitting the ACK/NACK signal on a basic response channel mapped to one of a Data CHannel (DCH) on which the packet data was received and a Shared Control CHannel (SCCH) carrying scheduling information about the packet data; and if the UE is set to support ACK/NACK repetition, selecting one of supplementary response channels for each ACK/NACK repetition, the supplementary response channels being allocated for ACK/NACK repetition, and repeatedly transmitting the ACK/NACK signal on the selected supplementary response channel according to a predetermined repetition factor.