H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 12/56 (2006.01) H04L 12/26 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2183594
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.
Grunenfelder Reto
Stock Thomas
Alcatel Str Ag
Robic
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