Received path trace detection apparatus

Details Received path trace detection apparatus Received path trace detection apparatus

2005-02-25

2008-10-07

Nguyen, Chau (Department: 2619)

Multiplex communications

Diagnostic testing

Fault detection

C370S248000

Reexamination Certificate

active

07433318

ABSTRACT:
A received path trace detection apparatus includes (i) a specific byte extracting/holding function unit for receiving a path signal and extracting and holding once path information written for showing the path in specific bytes in the received path signal at a predetermined sampling timing, (ii) a comparing function unit for detecting if path information for specific bytes held and path specific bytes currently received match, (iii) a protecting function unit for detecting that the matches have continued for exactly a predetermined number of protection stages as a result of the comparison by the function unit, and (iv) a forwarding function unit for forwarding the held path information to an erroneous connection decision unit for deciding if values exhibited by path information of the specific bytes held at the function unit and predetermined expected values match when matches of the consecutive number of protection stages are detected by the function unit.

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International Search Report dated Nov. 26, 2002.

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