Patent ID: 7797604

Claim:
A transmitting apparatus for codeword retransmission using feedback information, the transmitting apparatus comprising: an index divider for indicating index information in predetermined division information based on retransmission request information received from a receiving apparatus, wherein the retransmission request information includes location information on retransmission code-bits to be retransmitted; a retransmission division determiner for calculating a number of radio resources for packet data retransmission, comparing the calculated number of radio resources to retransmission division information, and generating result information, wherein the retransmission division information includes a number of the retransmission code-bits which have lower reliability than a predetermined reference value in the predetermined division information; and a transmission controller for, based on the result information, forming retransmission information bits by filling the retransmission code-bits in the calculated number of radio resources using the index information, forming a retransmission codeword by adding a parity bit sequence to the formed retransmission information bits, and transmitting the retransmission codeword to the receiving apparatus.