The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 26, 2006
Filed:
Nov. 29, 2001
David Elie-dit-cosaque, Richardson, TX (US);
Maher Ali, Richardson, TX (US);
David Elie-Dit-Cosaque, Richardson, TX (US);
Maher Ali, Richardson, TX (US);
Alcatel, Paris, FR;
Abstract
Protection paths are dynamically allocated in a wavelength-division multiplexed network including a plurality of nodes () coupled by communication links (). A database () stores information regarding the status of the network including information associating channels in each link of the node to one or more protection paths and information associating channels in each link to respective working paths. Upon receiving a request for a new protection path to protect a defined working path, links are identified that have at least one shareable channel which may be shared between the new protection path and one or more existing protection paths, as are links that do not have a shareable channel but do have an unused channel that may be used for the new protection path. Costs are assigned to identified links where links that have at least one shareable channel are weighted differently than links that do not have a shareable channel. A protection path is determined using the found links based on the costs.