Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2007-02-06
2007-02-06
Pham, Chi (Department: 2616)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S392000, C370S412000, C370S474000, C370S536000
Reexamination Certificate
active
10185330
ABSTRACT:
Data frames are converted to a format suitable for transparent, flexible concatenated transport such that a network element not supporting flexible concatenation may transparently pass the data frames. Flexible concatenation involves nonstandard data frames such as an STS-4cor an STS-Nc in which the time slots do not occupy rigidly defined contiguous time slots. In transparent flexible concatenation, the pointer from the parent time slot is used for each of the child time slots and the concatenation identifier is set to indicate no concatenation. In this way, the concatenated data appears to be a series of conventional STS-1s such that pointer processing may be successfully accomplished even by a network element not capable of handling non-standard concatenations. A downstream receive framer reconstructs the original STS-Nc based on the N STS-1s and a concatenation table the contents of which are shared between the transmit framer and the downstream receive framer.
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PCT, “International Preliminary Examination Report”.
International Search Report for corresponding International Application WO2004/004234, dated Jan. 8, 2004.
Klausmeier Daniel
Wellbaum Tom
Bernard Christopher L.
Brown Tyler S.
Ciena Corporation
Clements / Walker
Jagannathan Melanie
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