Method for configuring and transmitting an HARQ ACK/NACK signal, and device using same

A mobile station for transmitting a Hybrid Automatic Repeat reQuest (HARQ) ACKnowledgement/Not-ACKnowledgement (ACK/NACK) signal in a multi-component carrier system, the mobile station comprising:

• a transceiver unit configured to receive a plurality of codewords in at least one component carrier of a downlink subframe from a base station (BS) and transmit bundled HARQ ACK/NACK signals to the BS;
• and
• a controller configured to fully or partially bundle the HARQ ACK/NACK signals with respect to the plurality of codewords over each component carrier on the basis of a spatial bundling scheme,
• wherein the controller selects the spatial bundling scheme on the basis of channel quality of a downlink.

A method for receiving a Hybrid Automatic Repeat reQuest (HARQ) ACKnowledgement/Not-ACKnowledgement (ACK/NACK) signal by a base station in a multi-component carrier system, the method comprising:

• recognizing quality of a downlink channel on the basis of uplink information transmitted from a mobile station;
• determining a scheme of spatial bundling on the basis of the quality of the downlink channel;
• transmitting information regarding an HARQ ACK/NACK signal configuration scheme indicating the determined scheme of spatial bundling to the mobile station;
• and
• receiving bundled HARQ ACK/NACK signals generated on the basis of the information regarding the HARQ ACK/NACK signal configuration scheme from the mobile station.

A base station for receiving a Hybrid Automatic Repeat reQuest (HARQ) ACKnowledgement/Not-ACKnowledgement (ACK/NACK) signal in a multi-component carrier system, the base station comprising:

• a transceiver unit configured to receive uplink information indicating downlink channel quality from a mobile station and receive bundled HARQ ACK/NACK signals generated on the basis of information regarding a HARQ ACK/NACK signal configuration scheme from the mobile station;
• and
• a controller configured to recognize quality of the downlink channel on the basis of the uplink information and determine a scheme of spatial bundling on the basis of the quality of the uplink channel,
• wherein the transceiver unit transmits information regarding the HARQ ACK/NACK signal configuration scheme indicating the determined scheme of spatial bundling to the mobile station.