Digital data transmission error checking method and system

Details Digital data transmission error checking method and system Digital data transmission error checking method and system

2005-08-30

2008-09-09

Baker, Stephen M. (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error/fault detection technique

Reexamination Certificate

active

07424667

ABSTRACT:
A digital data transmission error checking method and system is proposed, which is designed for use with a data source unit and a data reception unit for providing a error checking function, and which is characterized by the use of an improved checksum algorithm that initially sets a checksum variable to a fixed value and then repetitively increases the value of the checksum value by adding the value of each data unit in the original digital data stream plus the resulted value of an exclusive-OR operation on the previous checksum value and the index number of the current data unit in the original digital data stream. This feature allows the reception side to determine whether there are erroneous bits in the received data stream even if the sequential order of the bytes in the original digital data stream is mistakenly disordered.

REFERENCES:
patent: 4947396 (1990-08-01), Shin et al.
patent: 5343530 (1994-08-01), Viricel
patent: 5488702 (1996-01-01), Byers et al.
patent: 6044488 (2000-03-01), Liedtke
patent: 6408374 (2002-06-01), Calamvokis et al.

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