Patent ID: 9020517
Filing Date: 2015-04-28
Classification: H04L,H04W

Abstract:
1. 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 on 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 increases until exhausted and then resets, the orthogonal sequence index increases each time the cyclic shift index is exhausted, until exhausted, and then resets, and the resource block index of resources for reception of the ACK/NACK increases each time the orthogonal sequence index is exhausted.