CRC generation and detection method

Details CRC generation and detection method CRC generation and detection method

1995-02-28

1998-03-03

Baker, Stephen M.

Excavating

H03M 1300

Patent

active

057243700

ABSTRACT:
A method of generating a cyclic redundancy check (CRC) word during transmission and of validating a CRC word during reception in a multiplex data communication system using a single CRC register. A CRC word is generated as data are transmitted by calculating the CRC word based on reflected data, rather than on the transmitted data. The transmitted data is reflected back to the transmitting unit's CRC generation block and the CRC word is immediately generated and appended to the outgoing transmission. In an aspect of the invention and to check whether the transmission was error-free, the one's complement of a CRC word is generated and stored in a CRC register, and the reflected transmission of the CRC word is circulated through the CRC register to yield a predetermined constant value if the transmission was error free.

REFERENCES:
patent: 4398298 (1983-08-01), Van Egmond et al.
patent: 4434421 (1984-02-01), Baker et al.
patent: 4573045 (1986-02-01), Galin
patent: 4639921 (1987-01-01), Gang et al.

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