Patent ID: 8873463

Claim:
A method for transmitting data by a base station in a wireless system, the method comprising: transmitting a downlink signal to a relay node or a terminal by using a special subframe, wherein the special subframe includes a first transmission period and a second transmission period, wherein the first transmission period is set to transmit the downlink signal to the relay node or the terminal, wherein the second transmission period is set to transmit the downlink signal to the relay node and is set to not decode a reference signal by the terminal, wherein special subframe configurations for a transmitting end and a receiving end are different from each other, and wherein the transmitting end and the receiving end are determined based on the number of downlink subframes and uplink subframes, and the base station is set to the transmitting end when the number of uplink subframes is larger than the number of downlink subframes, and the base station is set to the receiving end when the number of downlink subframes is larger than the number of uplink subframes.