A data transmission method includes transmitting, by a first communications apparatus, first data with a second communications apparatus on a first frequency resource. The method also includes sending, by the first communications apparatus, control information to the second communications apparatus. The control information is used to schedule a part or all of the first data transmitted between the first communications apparatus and the second communications apparatus on a second frequency resource. A first transmission mode supported by the first frequency resource is different from a second transmission mode supported by the second frequency resource. Alternatively, the first transmission mode is the same as the second transmission mode, and a first feedback quantity supported by the first frequency resource is different from a second feedback quantity supported by the second frequency resource.