Method for testing the conformity of an algorithm called GCRA fo

Details Method for testing the conformity of an algorithm called GCRA fo Method for testing the conformity of an algorithm called GCRA fo

1996-08-15

1999-11-23

Nguyen, Chau

Multiplex communications

Diagnostic testing

Determination of communication parameters

370395, H04J 314, H04L 1226

Patent

active

059912740

ABSTRACT:
A generic cell rate monitoring algorithm (GCRA) which is implemented in an ATM network element must be tested during operation. The method uses a second GCRA of the same kind which is synchronized with the first one, and a conformity test is carried out by comparing the results of both GCRAs. The synchronization is preferred when both GCRAs are in a regeneration state. This is artificially produced during operation of the GCRA to be tested by temporarily changing a parameter of the agreement in such a way, that a contract violation can no longer occur. The time of reaching the regeneration state can be limited by special steps of the method. An apparatus for carrying out the method (30) comprises a conformity decision unit (20), which counts arriving cells and compares counter positions, an implementation of the second GCRA (14) and a circuit (13) for synchronization, together with a return line (15) to an insertion circuit (16) for the cell stream in the line (1). The cell stream is directed to both GCRA implementations (4, 14) via a branch (10). The difference in running time from the branch to the two implementations cannot be longer than one cell transmission time.

REFERENCES:
patent: 5524006 (1996-06-01), Hluchyj et al.
patent: 5541913 (1996-07-01), Witters et al.
patent: 5570360 (1996-10-01), Klausmeier et al.
patent: 5666353 (1997-09-01), Klausmeier et al.
patent: 5796956 (1998-08-01), Jones

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