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:
May. 12, 2015
Filed:
Mar. 28, 2007
Christopher Warren Murray, Ottawa, CA;
Reza Mohammad Rokui, Kanata, CA;
Ehsan Rezaaifar, Kanata, CA;
Chuong Ngoc Ngo, Ottawa, CA;
Christopher Warren Murray, Ottawa, CA;
Reza Mohammad Rokui, Kanata, CA;
Ehsan Rezaaifar, Kanata, CA;
Chuong Ngoc Ngo, Ottawa, CA;
Alcatel Lucent, Boulogne-Billancourt, FR;
Abstract
Routing path calculation apparatus and methods are disclosed. Calculation of routing paths within different routing areas of a communication system is handled by respective routing path calculation devices. Multiple devices may be requested to perform respective routing path calculations for segments of a routing path between endpoints in different routing areas. Recalculations may be requested from the same or different devices in the event of a change in a routing area that affects a segment of a routing path. A routing path calculation device, whether or not in this type of distributed routing path calculation system, may determine whether a previously configured path exists between an intermediate node of a calculated routing path, and take the previously configured path into account in calculating the routing path if it is determined that a previously configured path exists. The previously configured path may be an Interior Gateway Protocol (IGP) shortcut, for example.