Meriton Networks US Inc.

Meriton Netowrks US Inc.

Ravichandran Iyer

Xiaowen Mang

Leah L Zhang

Paul Bonenfant

Antonio Rodriguez-Moral

Manjunath Sampangi

A technique for allocating protection-switching mechanisms operates on a per wavelength basis. This allows a designer of an optical network to select a particular protection switching mechanism for a given traffic type, which is usually specific to a particular wavelength in an optical network. For another traffic type, the designer can allocate a different protection switching mechanism, thereby providing optimal protection switching for each traffic type.

Method and apparatus for providing multiple optical channel protection switching mechanisms in optical rings

A method for merging protection switching messages in an optical network enables a control of the amount of message bandwidth used for sending protection switching messages. A method for performing protection switching in an optical network does so in an optimal manner by performing the protection switching actions in the various nodes of a protection path in parallel rather than in sequence. To do so, a channel failure message is transmitted from an end node A in the optical network upon detecting a failure in a link in the optical network that includes the end node A. If a failure can be detected at both end nodes, the channel failure messages are transmitted from both end nodes the moment they detect failure without any further waiting. Upon receiving the first channel failure message regardless its originating end node, switching actions in intermediate nodes are initiated. The channel failure messages are forwarded from the intermediate nodes to their corresponding next nodes before completing switching actions in the intermediate nodes. When receiving channel failure response messages, these messages are forwarded to a next node from the intermediate node only after switching actions are complete in the intermediate node.

Method and apparatus for processing protection switching mechanism in optical channel shared protection rings

A method for performing protection switching in an optical network does so in an optimal manner by performing the protection switching actions in the various nodes of a protection path in parallel rather than in sequence. To do so, a channel failure message is transmitted from an end node A in the optical network upon detecting a failure in a link in the optical network that includes the end node A. If a failure can be detected at both end nodes, the channel failure messages are transmitted from both end nodes the moment they detect failure without any further waiting. Upon receiving the first channel failure message regardless its originating end node, switching actions in intermediate nodes are initiated. The channel failure messages are forwarded from the intermediate nodes to their corresponding next nodes before completing switching actions in the intermediate nodes. When receiving channel failure response messages, these messages are forwarded to a next node from the intermediate node only after switching actions are complete in the intermediate node. A technique for merging messages in nodes is also disclosed.

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Freehold, NJ, United States of America

Ravichandran Iyer