Method and apparatus for ensuring CRC error generation by a data

Details Method and apparatus for ensuring CRC error generation by a data Method and apparatus for ensuring CRC error generation by a data

1991-02-14

1993-03-16

Beausoliel, Robert W.

Excavating

371 491, G06F 1100

Patent

active

051950936

ABSTRACT:
A method for ensuring CRC error generation by a data communication station after a transmitter exception such as an underrun whereby a parity bit is preset to a binary one, and toggled in response to successive binary ones of a serial bit stream. Each byte of the serial bit stream is transmitted sequentially. If a transmitter exception occurs, the byte before the exception is transmitted normally. However, only the first seven bits of the last byte are transmitted. The parity bit is sent as an eighth bit of the last byte, ensuring odd parity for the previous bit stream. Thereafter, a byte even parity is sent to assure that the overall message has odd parity. A receiving station interprets two consecutive bytes having the predetermined data pattern as the CRC, thus ensuring that the receiving station will reject the frame.

REFERENCES:
patent: 4107649 (1978-08-01), Kurihara
patent: 4462102 (1984-07-01), Povlick
patent: 4567595 (1986-01-01), Hedlund
patent: 4670876 (1987-06-01), Kirk
patent: 4876686 (1989-10-01), Sasaki et al.
patent: 4942515 (1990-07-01), Marzucco et al.
Motorola MC68605 X.25 Protocol Controller (XPC) Advance Information data sheet, MC68605/D (1987), at pp. 4-14 and 4-15.
Ramabadran, T. and Gaitonde, S., "A Tutorial on CRC Computations," IEEE Micro, vol. 8, No. 4, 1988, pp. 62-75.

Affiliated with

Also associated with

Rating

Method and apparatus for ensuring CRC error generation by a data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for ensuring CRC error generation by a data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for ensuring CRC error generation by a data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-356253