Patent ID: 7913145
Filing Date: 2011-03-22
Classification: H04L,Y02D

Abstract:
1. A re-transmission control method for a transmitting device that transmits a codeword generated based on a first parity-check matrix to a receiving device, and re-transmits a k-th additional parity generated based on a k-th parity-check matrix to the receiving device when receiving a negative acknowledgement for the codeword or a (k−1)-th additional parity, where k is a positive integer, the re-transmission control method comprising: transforming a k-th parity-check matrix into an irreducible standard form so that the k-th parity-check matrix includes a k-th check symbol generator matrix; generating a (k+1)-th parity-check matrix including the k-th parity-check matrix transformed in the irreducible standard form; transforming the (k+1)-th parity-check matrix into the irreducible standard form so that the (k+1)-th parity-check matrix includes the k-th check symbol generator matrix and a (k+1)-th check symbol generator matrix; generating a generator matrix including the k-th check symbol generator matrix and the (k+1)-th check symbol generator matrix; generating the k-th additional parity based on the generator matrix; and transmitting the k-th additional parity to the receiving device.