Patent ID: 8331947

Claim:
A method for receiving ACKnowledgement (ACK)/Negative ACK (NACK) information by a base station in a mobile communication system, the method comprising: transmitting data and control information to at least one User Equipment (UE), the control information being transmitted through a downlink control channel including at least one control channel element (CCE); checking a resource for reception of an ACK/NACK mapped to the at least one CCE based on a mapping rule between CCEs and resources for reception of the ACK/NACK, the resource for reception of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and receiving the ACK/NACK information for the transmitted data using the checked resource, wherein the mapping rule is that as an index corresponding to a CCE sequentially increases, the cyclic shift index, the orthogonal sequence index, and the resource block index of resources for reception of the ACK/NACK sequentially increase one by one.