A method for signal transmission in a wireless communication system, the method comprising: transmitting backhaul resource allocation information by a base station (11, 100) to a relay node (12, 200); decoding the backhaul resource allocation information by the relay node; and transmitting backhaul downlink control information and backhaul downlink data by the base station to the relay node, wherein a start position of a symbol for transmitting the backhaul downlink control information is fixed to a specific symbol of a backhaul link subframe when a modification signal is not provided by a higher layer signal, or the start position of the symbol for transmitting the backhaul downlink control information is changed over the specific symbol of the backhaul link subframe when the modification signal is provided by the higher layer signal, wherein the backhaul resource allocation information includes first information on a radio resource for transmitting the backhaul downlink data, wherein the backhaul resource allocation information further includes second information on a symbol at which a radio resource for transmitting the backhaul downlink data starts and third information on a length of the radio resource in a time domain, and wherein, if the second and third information are not included in the backhaul resource allocation information, the first information on the radio resource for transmitting the backhaul downlink data indicates a symbol contiguously located next to the symbol for transmitting the backhaul downlink control information as a start symbol of a radio resource for transmitting the backhaul downlink data in a frequency band in which the backhaul downlink control information is transmitted. transmitting backhaul resource allocation information by a base station (11, 100) to a relay node (12, 200); decoding the backhaul resource allocation information by the relay node; and transmitting backhaul downlink control information and backhaul downlink data by the base station to the relay node, wherein a start position of a symbol for transmitting the backhaul downlink control information is fixed to a specific symbol of a backhaul link subframe when a modification signal is not provided by a higher layer signal, or the start position of the symbol for transmitting the backhaul downlink control information is changed over the specific symbol of the backhaul link subframe when the modification signal is provided by the higher layer signal, wherein the backhaul resource allocation information includes first information on a radio resource for transmitting the backhaul downlink data, wherein the backhaul resource allocation information further includes second information on a symbol at which a radio resource for transmitting the backhaul downlink data starts and third information on a length of the radio resource in a time domain, and wherein, if the second and third information are not included in the backhaul resource allocation information, the first information on the radio resource for transmitting the backhaul downlink data indicates a symbol contiguously located next to the symbol for transmitting the backhaul downlink control information as a start symbol of a radio resource for transmitting the backhaul downlink data in a frequency band in which the backhaul downlink control information is transmitted.