Optimization of photonic services with colorless and directionless architecture
First Claim
1. A method, in a node operating in a network with a control plane, to optimize wavelength retuning on service redials comprising one or more of modifying a path and a wavelength through the control plane, the method comprising:
- detecting a failure on a link associated with the node; and
for each affected connection on the link, sending a respective release message to an associated originating node via the control plane, the release message including an associated protect path and a wavelength determined by the node instead of by the associated originating node, wherein the release message is utilized by the associated originating node to redial the affected connections with the associated protect path and the wavelength determined by the node,wherein the control plane is a source-based routing control plane with associated originating nodes using the protect path and the wavelength in the release message to redial the affected connections.
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Accused Products
Abstract
A method, in a node operating in a network with a control plane, to optimize wavelength retuning on service redials, includes detecting a failure on a link associated with the node; and, for each affected connections on the link, sending a respective release message to an associated originating node via the control plane, the release message including a protect path and a wavelength, wherein the release message is utilized by the associated originating node to redial the affected connections with the protect path and the wavelength determined by the node, to minimize wavelength retuning on the affected connections.
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Citations
18 Claims
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1. A method, in a node operating in a network with a control plane, to optimize wavelength retuning on service redials comprising one or more of modifying a path and a wavelength through the control plane, the method comprising:
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detecting a failure on a link associated with the node; and for each affected connection on the link, sending a respective release message to an associated originating node via the control plane, the release message including an associated protect path and a wavelength determined by the node instead of by the associated originating node, wherein the release message is utilized by the associated originating node to redial the affected connections with the associated protect path and the wavelength determined by the node, wherein the control plane is a source-based routing control plane with associated originating nodes using the protect path and the wavelength in the release message to redial the affected connections. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method, in a node operating in a network with a control plane, to plan protect paths to optimize wavelength retuning on service redials service redials comprising one or more of modifying a path and a wavelength through the control plane, the method comprising:
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adding each new connection associated with the node to a queue with source-destination pairs for the new connection; determining an associated protect path for all connections in the queue in order using an existing wavelength for each of the connections if possible and, if unable to find a protect path, moving the connection to an end of the queue; if unable to find the associated protect path for one or more of the connections with an associated existing wavelength after traversing the queue, determining the associated protect path for the one or more of the connections which require a retune with a new wavelength; and storing the associated protect paths for the connections, for use in respective release messages for affected connections responsive to a failure, the release messages including the associated protect path and a wavelength determined by the node instead of by an associated originating node for the connections. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A node operating in a network with a control plane, the node is configured to plan protect paths to optimize wavelength retuning on service redials service redials comprising one or more of modifying a path and a wavelength through the control plane, the node comprising:
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one or more ports communicatively coupled to one or more links in the network; and a controller communicatively coupled to the one or more ports, wherein the controller is configured to detect a failure on a link associated with the node; and for each affected connection on the link, send a respective release message to an associated originating node via the control plane, the release message including a protect path and a wavelength, wherein the release message is utilized by the associated originating node to redial the affected connections with the protect path and the wavelength determined by the node, wherein, to optimize the wavelength retuning, the controller is configured to determine the associated protect path using an existing wavelength for all the affected connections first if possible, and only for the affected connections that do not have the associated protect path with the existing wavelength, the controller is configured to determine the associated protect path with a different wavelength. - View Dependent Claims (18)
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Specification