Multiplex communications – Communication techniques for information carried in plural... – Adaptive
Reexamination Certificate
2005-11-15
2005-11-15
Lee, Andy (Department: 2663)
Multiplex communications
Communication techniques for information carried in plural...
Adaptive
C370S907000
Reexamination Certificate
active
06965612
ABSTRACT:
Methods and apparatus for the hardware implementation of virtual concatenation and link capacity adjustment over SONET/SDH frames include providing a state machine on chip with a SONET/SDH mapper and providing means whereby a plurality of members of a VCG can share the same state machine. The apparatus of the invention preferably includes a time wheel for granting access to the single state machine and memory for storing state information for each of the VCG members. According to the presently preferred embodiment, the invention is implemented on chip with an OC-3 Ethernet mapper. Up to eighty-four VCG members share the same state machine and memory is provided on the chip for maintaining the state information for eighty-four VCG members. Fifteen bits are used to store the state information for each VCG member in low order and seventeen bits are used to store the state information for each VCG member in high order. The presently preferred time wheel runs at 20 MHz.
REFERENCES:
patent: 5461622 (1995-10-01), Bleickardt et al.
patent: 5615237 (1997-03-01), Chang et al.
patent: 5777998 (1998-07-01), Traverso et al.
patent: 6381328 (2002-04-01), Morton et al.
patent: 6449292 (2002-09-01), Weeber
patent: 6636529 (2003-10-01), Goodman et al.
patent: 6667989 (2003-12-01), Sekii et al.
patent: 6697373 (2004-02-01), Sandstrom
patent: 6700900 (2004-03-01), Turban
Paul Bonenfant et al, Generic Framing Procedure (GFP): The Catalyst for Efficient Data over Transport, May 2002, IEEE Communications Magazine, pp. 72-79.
Richard Schildberg, Virtual concatenation, LCAS benefit next-gen Sonet/ SDH nets, Jun. 10, 2002, CommsDesign.
Synchronous Digital Hierarchy Bit Rates, CCITT Recommendation G.707, International Telecommunication Union, Geneva, 1991.
Synchronous Frame Structures Used at 1544, 6312, 2048, 8448 and 44 736 kbit/s Hierarchical Levels, ITU-T Recommendation G.704, International Telecommunication Union, Oct. 1998.
Chohan Harpreet S.
Rouaud Christophe
Gordon & Jacobson, PC
Lee Andy
Transwitch Corporation
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