System for detecting the presence or absence of a loss of transf

Details System for detecting the presence or absence of a loss of transf System for detecting the presence or absence of a loss of transf

1997-06-25

1998-11-03

Meky, Moustafa M.

Excavating

371 377, G06F 1502

Patent

active

058322957

ABSTRACT:
Data is transferred via FIFO memories on a word unit basis. In case of adding redundant bits to the transfer word and judging a loss of a word, on the transmission side, transmission side judgment bits having a fixed bit arrangement of two bits are added to each word. Further, with respect to the m-th word, the transmission side judgment bits are shifted by (m-1) bits and a bit arrangement is changed and the resultant data is transmitted. On the reception side, the transmission side judgment bits are reversely shifted to the original positions and three bits in which one bit adjacent to the transmission side judgment bits was added thereto are checked. When a bit arrangement of the reception side judgment bits corresponding to the transmission bits coincides wit a bit arrangement of the transmission side judgment bits, it is determined that there is no word loss. When they don't coincide, it is decided that there is a word loss.

REFERENCES:
patent: 4412314 (1983-10-01), Proebsting
patent: 4672534 (1987-06-01), Kamiya
patent: 4723244 (1988-02-01), Iacoponi
patent: 4791643 (1988-12-01), Molstad et al.

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