Method and device for signal transmission on a wireless communications system

In one aspect of the present invention, the method for signal transmission on a wireless communications system comprises: a step in which a base station transmits backhaul resource allocation information to a relay station; a step in which the relay station decodes the backhaul resource allocation information; and a step in which the base station transmits backhaul downlink control information and backhaul downlink data to the relay station; wherein the start position of a symbol for transmitting the backhaul downlink control information is fixed as a specific symbol of a backhaul link subframe, and the backhaul resource allocation information comprises information about a wireless resource to which the backhaul downlink data is transmitted.