Apparatus and method for determining byte gain and loss...

Details Apparatus and method for determining byte gain and loss... Apparatus and method for determining byte gain and loss...

2005-08-30

2005-08-30

Ho, Duc (Department: 2665)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S503000

Reexamination Certificate

active

06937621

ABSTRACT:
An apparatus and method determine byte gain and loss adjustments that compensate for frequency differences between ingress and egress data rate signals in a SONET/SDH NE. The count of ingress data rate signal pulses at the time that data is requested by a switch fabric is compared to the count of egress data rate signal pulses at the time the requested data is passed through the switch fabric. If a delta phase equal to the difference in counts less a reference phase, is continuously greater than a positive value threshold for at least a time threshold period, then a byte gain adjustment is determined. On the other hand, if the delta phase is continuously less than a negative value threshold for at least the time threshold period, then a byte loss adjustment is determined.

REFERENCES:
patent: 5390180 (1995-02-01), Reilly
patent: 5598445 (1997-01-01), Castano Pinto et al.
patent: 5708684 (1998-01-01), Ueda
patent: 6650637 (2003-11-01), Bansal et al.
patent: 6751238 (2004-06-01), Lipp et al.
patent: 2001/0015839 (2001-08-01), Koh et al.

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