Optical control plane determination of lightpaths in a DWDM network
First Claim
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1. A method comprising:
- in a dense wavelength division multiplexed (DWDM) network having a plurality of nodes and an electrical control plane that is configured to communicate with the plurality of nodes to handle routing of messages between the plurality of nodes and an optical control plane, designating an optical path route from a source node to a destination node by the electrical control plane;
receiving the path route at the optical control plane;
gathering optical parametric information of elements in the path route by the optical control plane;
determining a number of optical impairments along the optical path route using the optical parametric information; and
determining optical feasibility of the path route from the source node to the destination node by the optical control plane based on the number of optical impairments along the optical path route.
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Abstract
An optical control plane (OCP) distinct from an electronic control plane helps the setup of path routes in a DWDM network. The OCP determines the optical feasibility of any path route selected by the electronic control plane, such as operated under GMPLS protocol, and asks the electronic control plane for another path route if the optical feasibility is determined to be negative. The OCP can be set in a server or distributed across the nodes of the network.
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Citations
34 Claims
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1. A method comprising:
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in a dense wavelength division multiplexed (DWDM) network having a plurality of nodes and an electrical control plane that is configured to communicate with the plurality of nodes to handle routing of messages between the plurality of nodes and an optical control plane, designating an optical path route from a source node to a destination node by the electrical control plane; receiving the path route at the optical control plane; gathering optical parametric information of elements in the path route by the optical control plane; determining a number of optical impairments along the optical path route using the optical parametric information; and determining optical feasibility of the path route from the source node to the destination node by the optical control plane based on the number of optical impairments along the optical path route. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An apparatus comprising:
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a memory that stores an optical path route designated by an electrical control plane from a source node to a destination node in a dense wavelength division multiplexed (DWDM) network, the optical path route being used for optical communication between the source node and destination node; and at least one processor configured to; gather optical parametric information of elements in the path route; determine a number of optical impairments along the optical path route using the optical parametric information; and determine optical feasibility of the optical path route from the source node to the destination node based on the number of optical impairments along the optical path route. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification