| 摘要 |
PURPOSE:To improve the reliability without lowering the transmission efficiency by changing the initial pattern of a scramble pattern generator when a transmission error is detected and the data is sent again. CONSTITUTION:A retransmission device 3 detects a transmission error and sends the data by the reply from a receiving side and timeout supervision, In applying retransmission, the scramble pattern generator 1 forms a scramble pattern based on the initial pattern other than the initial pattern for the preceding scramble pattern, the probability to recover the transmission error generated by the band condition scramble pattern is improved by applying the scramble. In repeating the retransmission, since the initial pattern is changed by the initial pattern change device 2 at every occasion, the probability is improved further thereby improving the reliability. The initial pattern is sent at the head of the transmission frame for the descrmabling at the reception side. |
