An inter-device coordination apparatus includes a receiver configured to receive first sidelink information from a second terminal equipment and second sidelink information from a third terminal equipment; a processor configured to, according to the first sidelink information and the second sidelink information, determine that a conflict occurs in a first resource reserved by the first sidelink information; and a transmitter configured to transmit to the second terminal equipment first coordination information for indicating that a conflict occurs in the first resource, wherein a priority of the first coordination information is equal to the highest priority in a priority of the first sidelink information and a priority of the second sidelink information.