System and method for generating forward error correction...

Details System and method for generating forward error correction... System and method for generating forward error correction...

2006-01-31

2006-01-31

Decady, Albert (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S704000

Reexamination Certificate

active

06993700

ABSTRACT:
A system and method are provided for generating alarms from forward error correction (FEC) data in a G.709 network-connected integrated circuit. The method includes: receiving messages including forward error correction bytes; using the forward error correction bytes to detect errors in the messages; and, generating alarm signals in response to the detected errors. Generating alarm signals in response to the detected errors includes generating a signal degrade (SD) signal in response to detecting a first number of errors (error density) within a predetermined time period. Likewise, generating alarm signals in response to the detected errors includes generating a signal fail (SF) signal in response to detecting a second number of errors (second error density), greater than the first number, within the predetermined time period. The method further includes: selecting an error type. Then, alarm signals are generated in response to the selected error type. The error types include a “1s” density alarm, a “0s” density alarm, a bytes density alarm, and a sub-row density alarm.

REFERENCES:
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patent: 6690884 (2004-02-01), Kelty et al.
patent: 6801720 (2004-10-01), Mizuochi et al.

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