Method of and system for routing in a photonic network
First Claim
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1. A method of selecting an optically viable path through which to route a connection from a first node to a second node of a photonic network, the method comprising:
- selecting a plurality of optically viable photonic paths in the photonic network, at least one of the optically viable photonic paths comprising a plurality of consecutive optical links;
selecting a path from the first node to the second node taking account of the plurality of optically viable photonic paths as at least part of the topological context when selecting the pathwherein the step of selecting a plurality of optically viable photonic paths comprisespassing data identifying a first possible path in the photonic network to an optical viability checking function;
in response, receiving data indicating a measure of optical viability of the first possible path from the optical viability checking function; and
determining whether to include the first possible path in the plurality of optically viable photonic paths in dependence on the received data.
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Abstract
A method of and system for determining a path through which to route a connection in a photonic network in which optically viable photonic paths of one or more physical links are determined and considered as “virtual” links in a “virtual” topology. Routing is then performed using the “virtual” topology rather than the physical topology to compute “virtual” paths of one or more “virtual” links.
41 Citations
18 Claims
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1. A method of selecting an optically viable path through which to route a connection from a first node to a second node of a photonic network, the method comprising:
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selecting a plurality of optically viable photonic paths in the photonic network, at least one of the optically viable photonic paths comprising a plurality of consecutive optical links; selecting a path from the first node to the second node taking account of the plurality of optically viable photonic paths as at least part of the topological context when selecting the path wherein the step of selecting a plurality of optically viable photonic paths comprises passing data identifying a first possible path in the photonic network to an optical viability checking function; in response, receiving data indicating a measure of optical viability of the first possible path from the optical viability checking function; and determining whether to include the first possible path in the plurality of optically viable photonic paths in dependence on the received data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for use in a photonic network, the system comprising:
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a database arranged to store a plurality of optically viable photonic paths in the photonic network, at least one of the optically viable photonic paths comprising a plurality of consecutive optical links; and a routing function arranged to select a path in the photonic network taking account of the plurality of optically viable photonic paths as at least part of the topological context when selecting the path, an optical viability checking function arranged to determine a measure of optical viability of a possible path in the photonic network; and a path selection function arranged to selectively include the possible path in the database in dependence on the determined measure of optical viability of the possible path. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification