Method and apparatus for detection of errors in multiple-word co

Details Method and apparatus for detection of errors in multiple-word co Method and apparatus for detection of errors in multiple-word co

1996-02-22

1999-08-03

Chung, Phung M.

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error/fault detection technique

714807, 714819, G06F 1100

Patent

active

059319674

ABSTRACT:
A method and apparatus colors the conventional error codes of each word of a multiword transmission to facilitate the detection of words which are out of order or not part of the transmission, without affecting the data in the word. A 1-bit by n-bit matrix is assembled using the header word, and zeros for the header of the multiword transmission, or the data word, error code, if any, an identifier portion of the header word and zeros for each data word, and the 1-bit by n-bit matrix is multiplied by an n-bit by m-bit matrix assembled from a conventional error coding matrix and other matrices. The result either produces an error code to be sent with the header or data, or a check code to be verified as all zeros to indicate the absence of bit errors within the header or data word, and that the word is in the proper packet and in the proper sequence within the packet. An alternate method and apparatus colors the data portion of certain words of multiword transmissions to provide an alternate manner of facilitating the detection of words which are out of order or not part of the transmission.

REFERENCES:
patent: 4271520 (1981-06-01), Coombes et al.
patent: 5068854 (1991-11-01), Chandran et al.
patent: 5422894 (1995-06-01), Abe et al.
patent: 5448296 (1995-09-01), Music
patent: 5598422 (1997-01-01), Longwell et al.
Subrahmanyam Dravida, "Error Detection and Correction Options for Data Services in B-ISDN", IEEE Journal on Selected Areas in Communications, vol. 9, No. 9, Dec. 1, 1991.

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