CODEWORD AUTOMATIC REPEAT REQUEST/DECODING METHOD AND TRANSMITTING/RECEIVING APPARATUS BY USING FEEDBACK INFORMATION

摘要

A method for retransmitting/decoding a codeword using feedback information and a transmitting/receiving apparatus are provided to improve the success probability of retransmission by configuring retransmission feedback information by repeating a code bit of the previously transmitted codeword for decoding a retransmission part in a receiving apparatus. An apparatus for retransmitting/decoding a codeword using feedback information includes an index dividing unit, a retransmitting division determining unit, and a transmission controlling unit. The index dividing unit shows a position of data to retransmit as index information in pre-set division information based on retransmission request information received from a receiving apparatus. The retransmitting division determining unit calculates wireless resources used for retransmission of packet data, compares the number of retransmitting division information among the calculated wireless resources with the number of the calculated wireless resources, and generates result information. The transmission controlling unit completes an information bit for retransmission by using the index information to fill the calculated wireless resources with a code bit to transmit, forms a retransmission codeword obtained by adding a parity bit stream to the completed information bit, and transmits the codeword to the receiving apparatus.