Innovative architecture for fully non blocking service aggregation without O-E-O conversion in a DWDM multiring interconnection node

An apparatus comprising:

• an interconnection node configured to dynamically provide interconnection access between a first optical network and at least either a second optical network or a third optical network in a purely optical fashion;
• wherein the interconnection node includes:
• a first network portion coupled with the first network that includes an omni-directional and colorless multi-degree routing portion;
• a second network portion including first and second multi-degree reconfigurable optical add-drop multiplexers (ROADMs) coupled with the second network and the first network portion of the interconnection node such that optical signals may be routed between the second network and the first network;
• and
• a third network portion including first and second multi-degree ROADMs coupled with the third network and the first network portion of the interconnection node such that optical signals may be routed between the third network and the first network.

A method comprising:

• routing, in a purely optical fashion, an optical signal through an interconnection node configured to dynamically provide interconnection access between a first optical network and at least either a second optical network or a third optical network;
• wherein routing the optical signal through the interconnection node includes:
• receiving the optical signal via a first network portion of the interconnection node that is coupled with the first network and includes an omni-directional and colorless multi-degree routing portion;
• outputting the optical signal to either the second or third optical network via either:
• a second network portion including first and second multi-degree reconfigurable optical add-drop multiplexers (ROADMs) coupled with the second network and the first network portion of the interconnection node, or
• a third network portion including first and second multi-degree ROADMs coupled with the third network and the first network portion of the interconnection node.