Multiplex communications – Pathfinding or routing – Through a circuit switch
Reexamination Certificate
2007-05-03
2010-11-30
Wong, Warner (Department: 2471)
Multiplex communications
Pathfinding or routing
Through a circuit switch
C370S458000, C370S388000
Reexamination Certificate
active
07843905
ABSTRACT:
A modular optical switch includes a set of optical switch modules connected in a mesh, a master controller for the whole optical node and a switch-module controller for each of the optical switch modules. The optical switch modules receive optical signals from, and transmit optical signals to, edge nodes based on connection requests received from the edge nodes. The master controller acts to select a path, using a simple or compound time-slot matching process, through the mesh of switch modules for each optical signal related to a connection request. Advantageously, the optical switch modules are fast switching, enabling the use of time-sharing schemes such as TDM, and the modular optical core node is made practical by efficient path selection at the master controller. A hybrid modular switch may include both optical and electronic switch modules, a master controller, and a switch-module controller for each of the switch modules.
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Anderson Gorecki & Manaras LLP
Nortel Networks Limited
Wong Warner
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