Autoprotected optical communication ring network

An apparatus, comprising:

• a first ring network having a first optical carrier;
• and
• a second ring network having a second optical carrier, the first and second ring networks including:
• a pair of nodes that comprise a first and a second node, the pair being coupled along the first and second optical carriers and being operable to manage a subset of wavelengths within a set of transmission wavelengths, the set of transmission wavelengths including more than one transmission wavelength such that one of the transmission wavelengths can be switched while other transmission wavelengths in the set are not switched, a selected one of the set of transmission wavelengths may be reserved on the first optical carrier during a normal operative condition and during a failure the selected wavelength is implemented on the first optical carrier, wherein the first and second nodes are further operable to communicate with each other and to communicate along a working path under the normal operative condition, the first and second nodes being further operable to communicate with each other along a protection path during the failure within a selected one of the first and second ring networks such that one or more optical signals are rerouted along the protection path during the failure, and wherein a response to a failure condition is executed on a channel level, wherein each of the first and second nodes includes a plurality of transmitting and receiving transponders including:
• a first transmitting transponder optically coupled to the first optical carrier,
• a second transmitting transponder optically coupled to the first optical carrier, and
• a third transmitting transponder optically coupled to the second optical carrier, the plurality of receiving transponders including:
• a first receiving transponder optically coupled to the second optical carrier,
• a second receiving transponder optically coupled to the second optical carrier, and a third receiving transponder optically coupled to the first optical carrier, and wherein, under the normal condition, optical switches in an optical switch are configured to optically connect an optical transmitter to the first transmitting transponder,
• to optically connect the first receiving transponder to the third transmitting transponder,
• to optically connect the second receiving transponder to an optical receiver, and
• to optically connect the third receiving transponder to the second transmitting transponder;
• the first and second ring networks also including a first primary gateway node and a first secondary gateway node, the first primary gateway node and the first secondary gateway node being coupled along the first and second optical carriers;
• a third ring network having a third optical carrier;
• a fourth ring network having a fourth optical carrier, the third and fourth ring networks including:
• a second primary gateway node and a second secondary gateway node, the second primary gateway node and a second secondary gateway node being coupled along the third and fourth optical carriers;
• wherein the primary gateway nodes exchange signals with each other through a first set of optical connections that are separate from the first, second, third, and fourth carriers;
• wherein the secondary gateway nodes exchange signals with each other through a second set of optical connections that are separate from the first, second, third, and fourth carriers;
• and
• wherein the gateway nodes have a drop and continue functionality.