Repeater for receiving signals from a base station in a wireless communication system, and signal receiving method

A base station comprising:

• a transmitter configured to transmit first information indicating a pattern of subframes configured for the base station to a relay node (RN) transmission, second information indicating a set of resources blocks and third information used for determining a position of a starting symbol of a physical downlink shared channel (PDSCH) for the RN, and to transmit, through a subframe, a relay-physical downlink control channel (R-PDCCH) according to the pattern of subframes, and
• a processor configured to map the R-PDCCH to a RN-specific search space of the subframe,
• wherein the RN-specific search space of the subframe is located in the set of resource blocks indicated by the second information, and
• wherein a position of a starting symbol of the R-PDCCH within a first slot of the subframe is fixed in a time domain.

A method of receiving a relay-physical downlink control channel (R-PDCCH) by a relay node (RN) in a wireless communication system, the method comprising:

• receiving first information indicating a pattern of subframes configured for a base station to the RN transmission and second information indicating a set of resources blocks;
• receiving third information used for determining a position of a starting symbol of a physical downlink shared channel (PDSCH) for the RN;
• receiving, through a subframe, the R-PDCCH according to the pattern of subframes;
• and
• searching a RN-specific search space of the received subframe to detect the R-PDCCH based on a control channel element (CCE) aggregation level,
• wherein the RN-specific search space of the received subframe is located in the set of resource blocks indicated by the second information, and
• wherein a position of a starting symbol of the R-PDCCH within a first slot of the subframe is fixed in a time domain.

A relay node (RN) comprising:

• a receiver configured to receive first information indicating a pattern of subframes configured for a base station to the RN transmission, second information indicating a set of resources blocks to receive third information used for determining a position of a starting symbol of a physical downlink shared channel (PDSCH) for the RN and to receive, through a subframe, a relay-physical downlink control channel (R-PDCCH) according to the pattern of subframes;
• and
• a processor configured to control the receiver and to search a RN-specific search space of the received subframe to detect the R-PDCCH based on a control channel element (CCE) aggregation level,
• wherein the RN-specific search space of the received subframe is located in the set of resource blocks indicated by the second information, and
• wherein a position of a starting symbol of the R-PDCCH within a first slot of the subframe is fixed in a time domain.