Method for transmitting control signal to relay node at base station in mimo communication system and apparatus therefor

PURPOSE: A method for transmitting resource element pattern information for channel state indicator reference signal to a relay node are provided to index in a time priority method in a slot unit about a resource element group for relay node. CONSTITUTION: A base station excludes a RE for reference signal and forms a R-REG(Relay-Resource Element Group) for a relay node in four continuous RE units. The base station allocates transmission resources in a resource element group unit for the relay node to the control signal. The base station transmits the control signal to the relay node through the allocated transmission resources.