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Multiple interconnected broadcast and select optical ring networks with revertible protection switch

  • US 20060275035A1
  • Filed: 05/02/2006
  • Published: 12/07/2006
  • Est. Priority Date: 05/02/2005
  • Status: Abandoned Application
First Claim
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1. A method for optical communications, comprising:

  • dividing optical communication nodes in a given service area into a plurality of groups of communication nodes that are in different areas within the given service area;

    linking communication nodes in each group to form a single broadcast-and-select ring network so that a plurality of broadcast-and-select single ring networks are formed in the groups, respectively;

    interconnecting the single ring networks to allow for direct optical communications between any two of the single ring networks so that each single ring network has a junction node that is optically linked to other single ring networks;

    providing a gate node in each single ring network that is located at or near a middle location in the single ring network with respect to the junction node, wherein the gate node has a switching mechanism to close or open an optical link at the gate node in response to a control signal; and

    closing an optical link in a gate node in a single ring network when there is an optical break in the single ring network while keeping the optical link in gate nodes in other single ring networks closed.

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