Patent ID: 8774081

Claim:
A method of transmitting an uplink signal at a relay node (RN) in a wireless communication system, the method comprising: receiving pattern information of downlink subframes for a base station (BS)-to-the RN transmission as a bitmap; receiving resource block (RB) information for detecting a relay physical downlink control channel (R-PDCCH) in a corresponding downlink subframe n for the BS-to-the RN transmissions; receiving the R-PDCCH from a fourth orthogonal frequency division multiplexing (OFDM) symbol of the corresponding downlink subframe n based on the RB information; receiving a physical downlink shared channel (PDSCH) of the corresponding downlink subframe n; and transmitting feedback information for the received PDSCH to the BS via an uplink subframe for the RN-to-the BS transmissions, wherein the uplink subframe for the RN-to-the BS transmissions corresponds to an uplink subframe n+4.