Multiplex communications – Diagnostic testing – Of a switching system
Reexamination Certificate
2007-03-06
2007-03-06
To, Doris H. (Department: 2616)
Multiplex communications
Diagnostic testing
Of a switching system
C370S230000
Reexamination Certificate
active
10054512
ABSTRACT:
A method and apparatus are provided for low latency loss-free burst switching. Burst schedules are initiated by controllers of bufferless core nodes and distributed to respective edge nodes. In a composite-star network, the burst schedules are initiated by any of a plurality of bufferless core nodes and distributed to respective edge nodes. Burst formation takes place at source nodes and a burst size is determined according to an allocated bitrate of a burst stream to which the burst belongs. An allocated bitrate of a burst stream may be modified according to observed usage of scheduled bursts of a burst stream. A method of control-burst exchange between each of a plurality of edge nodes and each of a plurality of bufferless core nodes enables burst scheduling, time coordination, and loss-free burst switching. Both the payload bursts and control bursts are carried by optical channels connecting the edge nodes and the core nodes. A method and a circuit are provided for generating burst descriptors wherein each burst is associated with a burst stream and each burst stream is allocated a service bitrate. The generated burst descriptors are used in each master controller in each core node to create the burst schedules. In a conventional burst-scheduling process, the burst queues at a master controller of an optical switch receives burst descriptors from the source nodes and schedules the burst switching times. In a distinct departure, according to the present invention, the burst descriptors are generated by a master controller of an optical switch in a core node, the switching times of the corresponding bursts are scheduled, and the schedules are distributed to the respective edge nodes. The burst-descriptor generation is based on burst-stream bitrate-allocation defined by the source nodes.
REFERENCES:
patent: 5966346 (1999-10-01), Arai
patent: 6118762 (2000-09-01), Nomura et al.
patent: 6226327 (2001-05-01), Igarashi et al.
patent: 6405257 (2002-06-01), Gersht et al.
patent: 6529571 (2003-03-01), Gaudet
patent: 6671256 (2003-12-01), Xiong et al.
patent: 6721271 (2004-04-01), Beshai et al.
patent: 6907002 (2005-06-01), Beshai et al.
patent: 6963654 (2005-11-01), Sotme et al.
Beshai Maged E.
Jamoussi Bilel N.
Blount Steve
McGuinness & Manaras LLP
Nortel Networks Limited
To Doris H.
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