Adaptive hybrid automatic repeat request method and apparatus

A method of receiving data in an adaptive hybrid automatic repeat request system, the method comprising:

• (a) receiving a data frame transmitted from a transmitting terminal, performing channel decoding of the received data frame, and when an error exists in the channel-decoded data frame, correcting the error;
• (b) when the error of the channel-decoded data frame is not corrected, measuring an error degree of a corresponding frame and transmitting a negative acknowledgement message to which the measured error degree is added, to the transmitting terminal;
• and
• (c) combining a parity bit that corresponds to the negative acknowledgement message and is retransmitted from the transmitting terminal, with a data bit of a data frame in which error correction fails and performing channel decoding and error correction.

A computer readable recording medium in which a program for executing an adaptive hybrid automatic repeat request method is recorded, the method comprising:

• (a) transmitting a data frame including a data bit and a parity bit that are channel-coded using a predetermined initial coding rate;
• (b) receiving the data frame, performing channel decoding of the received data frame, and when an error exists in the channel-decoded data frame, correcting the error;
• (c) when the error of the channel-decoded data frame is not corrected, measuring an error degree of a corresponding frame and transmitting a negative acknowledgement message to which the measured error degree is added, to the transmitting terminal;
• (d) transmitting a parity frame that is generated by performing channel coding of a parity bit corresponding to a parity level determined in accordance with the error degree added to the negative acknowledgement message;
• and
• (e) combining the retransmitted parity bit with a data bit of a data frame in which error correction fails and performing channel decoding and error correction.

A computer readable recording medium in which a program for executing the method of receiving data in an adaptive hybrid automatic repeat request system is recorded, the method comprising:

• (a) receiving a data frame transmitted from a transmitting terminal, performing channel decoding of the received data frame, and when an error exists in the channel-decoded data frame, correcting the error;
• (b) when the error of the channel-decoded data frame is not corrected, measuring an error degree of a corresponding frame and transmitting a negative acknowledgement message to which the measured error degree is added, to the transmitting terminal;
• and
• (c) combining a parity bit that corresponds to the negative acknowledgement message and is retransmitted from the transmitting terminal, with a data bit of a data frame in which error correction fails and performing channel decoding and error correction.