| 摘要 |
<p>PURPOSE:To enhance the reliability at data transmission by comparing a transmission ACK signal and a reception ACK signal when a reception multiplex node returns a reception acknowledge signal and retransmitting a frame sent before by a transmission multiplex node When the transmission/reception ACK signals are not coincident. CONSTITUTION:While returning an ACK signal, a reception multiplex node compares the content of a transmission ACK signal with that of a reception ACK signal to discriminate whether or not the return of the ACK signal from the reception multiplex node to the transmission multiplex node is correct. That is, the reception multiplex node monitors a bit allocating itself to a reception acknowledge area ACK-F and requests the retransmission of a frame P regardless of untransmission of a normal reception signal by its own terminal equipment, that is, the bit level of logical 1 in spite of the bit not set to logical 1. Thus, the comparison processing of the transmission/reception data and the retransmission processing when the said transmission/reception data are dissident are implemented to cope with a bit error in the reception acknowledge area so as to enhance the reliability at data transmission.</p> |
