Method for acquiring resource region information for PHICH and method of receiving PDCCH

A method for a user equipment (UE) to receive system information from a base station, the method comprising:

• receiving a PBCH (physical broadcast channel) comprising first system information from the base station, wherein the first system information comprises system bandwidth information and PHICH (physical hybrid ARQ indicator channel) related information, wherein the PHICH related information comprises first information associated with a number (GN) of PHICH group and second information associated with a PHICH duration (m), wherein multiple PHICHs mapped to the same set of resource elements constitute a PHICH group;
• receiving a PDCCH (Physical Downlink Control Channel) comprising control information from the base station via a first resource region excluding a second resource region assigned to the PHICH, wherein the second resource region assigned to the PHICH is based on the first information and the second information;
• and
• receiving a PDSCH (Physical Downlink Shared Channel) comprising second system information from the base station via a third resource region, wherein the third resource region is determined based on the control information of the PDCCH.