METHOD AND APPARATUS FOR PERFORMING A HYBRID AUTOMATIC REPEAT REQUEST PROCESS FOR AN UPLINK MULTI-CODEWORD TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM WHICH SUPPORTS A MULTI-ANTENNA TRANSMISSION

摘要

The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for performing a hybrid automatic repeat request process for an uplink multi-codeword transmission in a wireless communication system which supports a multi-antenna transmission. The uplink multi-codeword transmission method according to one embodiment of the present invention comprises the following steps: transmitting first and second codewords, transmitting information on the status of transmission buffer for the first and second codewords, receiving downlink control information (DCI) containing acknowledgement (ACK)/negative acknowledgement (NACK) information on each of the first and second codewords, and re-transmitting the codeword for NACK information, wherein the codeword for ACK information is not transmitted to a base station in cases where the transmission buffer is empty.