METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK HARQ INFORMATION IN WIRELESS COMMUNICATION SYSTEM

摘要

PURPOSE: A transmission method and a device for downlink HARQ(Hybrid Automatic Repeat reQuest) information from a wireless communications system are provided to transmit PHICH(Physical HARQ Indicator Channel) containing ACK/NACK(Acknowledgement/Negative Acknowledgement) information only in a determined frequency area by determining a specific frequency area for the PHICH. CONSTITUTION: PHICH signals transmitted to a terminal are repetitively generated a predetermined number of times. Weighting factors are applied to the repetitively generated PHICH signals transmitted through at least one antenna among multiple antennas. PHICH signals with weighting factors are mapped on at least one PRB(Physical Resource Block) included in PHICH resources. The weighting factors are set by considering phase differences among antenna channels. Information showing the phase differences between antenna channels is received from the terminal. The phase differences between antenna channels are set as the weighting factors by using the received information.