Method for engineering connections in a dynamically reconfigurable photonic switched network
First Claim
1. A method for engineering of a connection in a WDM photonic network with a plurality of flexibility sites connected by links, comprising:
- (a) calculating a physical end-to-end route between a source node and a destination node;
(b) setting-up a data communication path along said end-to-end route;
(c) detecting an end-to-end operational parameter of said data communication path at a power level that is between a maximum useful power level and a provisional power level; and
(d) comparing said operational parameter with a margin tolerance and declaring said data communication path as established, whenever said operational parameter is above said margin tolerance.
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Abstract
A method for engineering of a connection in a WDM photonic network with a plurality of flexibility sites connected by links comprises calculating a physical end-to-end route between a source node and a destination node and setting-up a communication path along this end-to-end route. An operational parameter of the communication path is continuously tested and compared with a test threshold. The path is declared established whenever the operational parameter is above the margin tolerance. The established path is continuously monitored by comparing the operational parameter with a maintenance threshold. A regenerator is switched into the path whenever the operational parameter is under the respective threshold, or another path is assigned to the respective connection. An adaptive channel power turn-on procedure provides for increasing gradually the power level of the transmitters in the path while measuring an error quantifier at the destination receiver until a preset error quantifier value is reached. As the connection ages, the power is increased so as to maintain the error quantifier at, or under the preset value. The path operation is controlled using a plurality of optical power/gain control loops, each for monitoring and controlling a group of optical devices, according to a set of loop rules.
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Citations
29 Claims
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1. A method for engineering of a connection in a WDM photonic network with a plurality of flexibility sites connected by links, comprising:
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(a) calculating a physical end-to-end route between a source node and a destination node; (b) setting-up a data communication path along said end-to-end route; (c) detecting an end-to-end operational parameter of said data communication path at a power level that is between a maximum useful power level and a provisional power level; and (d) comparing said operational parameter with a margin tolerance and declaring said data communication path as established, whenever said operational parameter is above said margin tolerance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for dynamic engineering of a data communication path in a WDM photonic network with a plurality of flexibility sites connected by links, comprising:
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(a) calculating a physical end-to-end route for connecting a source node and a destination node over said WDM network; (b) setting-up data communication path along said end-to-end route; (c) detecting an end-to-end operational parameter of said data communication path at a power level that is between a maximum useful power level and a provisional power level; and (d) comparing said operational parameter with a test threshold and declaring said data communication path as established, whenever said operational parameter is above said test threshold. - View Dependent Claims (12, 13, 14)
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15. A photonic network for routing a data communication path between a source node and a destination node along a route passing through an intermediate node, comprising:
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a pool of wavelength-converter/regenerators connected at said intermediate node; a line control system for collecting end-to-end performance information on said data communication path; and a network management system for assigning a wavelength-converter/regenerator from said pool to said data communication path and switching said data communication path through said wavelength-converter/regenerator, whenever the performance of said data communication path is outside an operation range and adjustment of a channel power level to return the performance to within a satisfactory performance range is not successful.
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16. A system for engineering a connection in a WDM photonic network with a plurality of flexibility sites connected by links, operable to:
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(a) calculate a physical end-to-end route between a source node and a destination node; (b) set-up a data communication path along said end-to-end route; (c) detect an end-to-end operational parameter of said data communication path at a power level that is between a maximum useful power level and a provisional power level; and (d) compare said operational parameter with a margin tolerance and declaring said data communication path as established, whenever said operational parameter is above said margin tolerance. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A system for dynamic engineering of a data communication path in a WDM photonic network with a plurality of flexibility sites connected by links, operable to:
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(a) calculate a physical end-to-end route for connecting a source node and a destination node over said WDM network; (b) set-up data communication path along said end-to-end route; (c) detect an end-to-end operational parameter of said data communication path at a power level that is between a maximum useful power level and a provisional power level; and (d) compare said operational parameter with a test threshold and declaring said data communication path as established, whenever said operational parameter is above said test threshold. - View Dependent Claims (27, 28, 29)
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Specification