The data transfer control method and a relay system, the method is applied in a radio relay system

The present invention relates to data transmission in a wireless relay system, and more specifically relates to a method for, based on the channel capacity of the individual links, measured at the terminal selects an optimal transmission mode. Data transmission method, the mobile communication method comprising: the mobile communication terminal from the base station transmits the first partial data of the first rate, transmitting the second portion of data of the second rate to the relay station from the base station, and a relay station according to the invention terminal to the second comprises a part of forwarding the data, and a first ratio or a second ratio from the basis of at least one of a channel capacity of the second link between the first link channel capacity and the relay station and the terminal between the base station and the handset and it characterized in that the crystal. According to the invention, it is possible to increase the cell capacity and expand the cell radius. The relay system, a wireless relay, the next generation mobile communication, transmission mode, and throughput.