Patent ID: 7426671

Claim:
A re-transmission controlling method comprising: an error-correction decoding step of executing the error-correction decoding on a data packet received; an error-judging step of judging whether said received data packet on which the error-correction decoding is executed has correctly been received or not; a re-transmission request step of making a re-transmission request, in the case where it is judged in said error-judging step that said received data packet has not been received correctly; a continuity-judging step of judging whether or not said received data packet is next in a sequence with a previously-received data packet that was judged to be correctly received, in the case where said received data packet is judged in said error-judging step to be received correctly; a disassembly step of disassembling said received data packet into predetermined data units; a transmission step of sending data disassembled into predetermined data units in said disassembly step to an upper layer, in the case where it is judged in said continuity-judging step that said received data packet is in sequence; and a temporary storage step of temporarily storing data disassembled into predetermined data units in said disassembly step, in the case where it is judged in said continuity-judging step that said received data packet is not in sequence, wherein a storage capacity used for temporarily accumulating data in said temporary storage step is secured when it is judged in said error-judging step that said received data packet has not been correctly received.