Method and apparatus for harq operation-supporting uplink data transmission in a special subframe in a wireless communication system

A method of transmitting a Physical Uplink Shared Channel (PUSCH) in a special subframe by a User Equipment (UE), the method comprising:

• receiving an Uplink (UL) grant from a base station, the UL grant being included in a downlink time period of Time Division Duplex (TDD) cell;
• determining a resource in an Uplink Pilot Time Slot (UpPTS) of a special subframe of the TDD cell to transmit a PUSCH associated with the received UL grant, wherein the special subframe, having subframe number 1, consists of a Downlink Pilot Time Slot (DwPTS), a guard period (GP), and the UpPTS;
• transmitting, from the UE, the PUSCH mapped to the resource in the UpPTS;
• and
• receiving a Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH) responsive to the PUSCH,
• wherein when the TDD cell having TDD UL/DL configuration 1 or 6, the UL grant was received in a downlink subframe having subframe number 5, and
• wherein when the TDD cell having TDD UL/DL configuration 2, the UL grant was received in a special subframe having subframe number 6.