Method and apparatus for providing integral cell payload integrity verification in ATM Telecommunication devices
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United States of America Patent
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Oct 28, 2003
Grant Date -
N/A
app pub date -
Oct 14, 1999
filing date -
Oct 14, 1999
priority date (Note) -
Expired
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Abstract
A method for verifying the integrity of data payloads of ATM cells passing through a switching device involves computing a payload integrity verification code for the payload portion of an ATM cell. The payload integrity verification code may be generated according to any error detection or error correction scheme. Preferably, the payload integrity verification code is stored in a portion of the standard ATM cell header which is not used while the cell is passing through the switching device. Preferably the payload integrity verification code is stored in all, or a portion of, the virtual path identifier or virtual connection identifier fields. The invention allows for the immediate identification of cells having corrupted payload data. Different actions may be taken on the detection of errors in the ATM cell header and ATM cell payloads respectively.
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