Apparatus and method for cooperatively transmitting downlink between base station and relay station

A method for cooperatively transmitting a downlink between a base station and a relay station, the method comprising:

• receiving, from the base station, cooperative transmission data and scheduling information for a cooperative transmission of the cooperative transmission data;
• transmitting, to the base station, an acknowledgement message with respect to the cooperative transmission data or the scheduling information;
• and
• transmitting the cooperative transmission data to a terminal with reference to the scheduling information,
• wherein a NACK message with respect to the cooperative transmission data is transmitted to the base station when an error occurs while receiving the cooperative transmission data transmitted from the base station, and the cooperative transmission data having the reception error is re-processed and the corrected cooperation transmission data is transmitted to the terminal,
• wherein the cooperative transmission data is re-processed based on a specific probability sequence,
• wherein the specific probability sequence indicates probability information of each code bit which comprises a code packet,
• wherein the code packet is generated by encoding an information packet into an MCS (Modulation and Coding Scheme) corresponding to a section between the relay station and the terminal, and
• wherein the information packet is generated based on the cooperative transmission data having the error.