Method of transmitting and receiving ack/nack signal and apparatus thereof

Abstract

Disclosed is a method for transmitting an ACK/NACK signal for an HARQ (Hybrid Automatic Repeat reQuest) in a CA (Carrier Aggregation) system, the method including obtaining at least one transmission resource among first and second transmission resources; configuring a first table showing a relationship in which a combination of at least one of the first and second transmission resources and modulation symbols is mapped to an ACK/NACK signal, and transmitting modulation symbols corresponding to a transmission target ACK/NACK signal in the first table by using transmission resource corresponding to the transmission target ACK/NACK signal in the first table.

1 . A method comprising:
 receiving a first and second Hybrid Automatic Repeat reQuest (HARQ) Acknowledgement (ACK) resource sets, each of the first and second HARQ ACK resource sets including four HARQ ACK resource values;   receiving downlink control information (DCI) including 2 bits of a transmission power control (TPC) field, which is an HARQ ACK resource indicator to indicate two HARQ ACK resources corresponding to n-th HARQ ACK resource value in the first HARQ ACK resource set and n-th HARQ ACK resource value in the second HARQ ACK resource set; and   mapping an HARQ ACK associated with a downlink data transmission onto a combination of at least one of the two HARQ ACK resources and a modulation symbol;   transmitting the HARQ ACK by using the combination.   
     
     
         2 . A user equipment (UE) comprising:
 a processor to receive a first and second Hybrid Automatic Repeat reQuest (HARQ) Acknowledgement (ACK) resource sets, each of the first and second HARQ ACK resource sets including four HARQ ACK resource values; and   a transceiver to receive downlink control information (DCI) including 2 bits of a transmission power control (TPC) field, which is an HARQ ACK resource indicator to indicate two HARQ ACK resources corresponding to n-th HARQ ACK resource value in the first HARQ ACK resource set and n-th HARQ ACK resource value in the second HARQ ACK resource set,   wherein the processor is configured to map an HARQ ACK associated with a downlink data transmission onto a combination of at least one of the two HARQ ACK resources and a modulation symbol, and   wherein the transceiver transmits the HARQ ACK by using the combination.