Multiplex communications – Pathfinding or routing – Through a circuit switch
Reexamination Certificate
2007-06-19
2007-06-19
Chan, Wing (Department: 2616)
Multiplex communications
Pathfinding or routing
Through a circuit switch
C370S382000, C370S384000, C370S370000
Reexamination Certificate
active
09960959
ABSTRACT:
Rather than restricting a stream of data to a single channel within a multi-channel link between a source node and a core node, each channel is divided into time slots and the stream of data is distributed among these time slots in several channels. However, to ease the management of switching the stream of data at the core node, simultaneous time slots in each channel may be arranged into “stripes,” such that a particular stripe may only include data segments having a common destination. Switching these stripes of data at the core node requires that the source of such a stripe arrange the frame according to a frame structure provided by the core node. Advantageously, where the frame is striped across an entire link, the present invention provides for a variation on link switching that approaches the topological reach of TDM switching while maintaining relatively straightforward operation at the core node. As the switching scheme requires time-locking between the core node and the source node, methods are provided for initializing, maintaining and recovering this time-locking while offsetting the effect of optical signal dispersion in multi-wavelength fiber links.
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Chan Wing
Lee Andrew C.
McGuinness & Manaras LLP
Nortel Networks Limited
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