METHOD AND TERMINAL FOR DETECTING PHICH IN WIRELESS ACCESS SYSTEM

摘要

The present invention relates to a method and terminal for detecting a physical hybrid-ARQ indicator channel (PHICH) in a wireless access system that supports enhanced inter-cell interference coordination. In particular, the method includes: determining whether the PHICH exists in only a 0th orthogonal Frequency Division Multiplexing (OFDM) symbol if a subframe transmitted by a neighboring base station is an almost blanked subframe (ABS); determining whether a common reference signal (CRS) of the neighboring base station collides with a CRS of a serving base station if the PHICH exists outside of the 0th OFDM symbol; determining whether CRS power of the neighboring base station is greater than a preset threshold if the CRS of the neighboring base station does not collide with the CRS of the serving base station; and determining whether an acknowledgement/negative-acknowledgement (ACK/Negative-ACK) is detected by replacing a symbol of the PHICH, overlapped with the CRS of the neighboring base station, with 0 and summing the PHICH symbols, when the CRS power of the neighboring base station is greater than the preset threshold.