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. 22, 2009
Filed:
Jun. 08, 2006
Luciana Buriol, Porto Alegre, BR;
Mauricio Guilherme DE Carvalho Resende, Holmdel, NJ (US);
Mikkel Thorup, Florence, MA (US);
Luciana Buriol, Porto Alegre, BR;
Mauricio Guilherme de Carvalho Resende, Holmdel, NJ (US);
Mikkel Thorup, Florence, MA (US);
AT&T Corp., New York, NY (US);
Abstract
A method and apparatus for updating a shortest path graph or a shortest path tree are disclosed. For example, an arc weight is changed for an arc in the network, where a plurality of affected nodes in the network is determined. The distance of each of the affected nodes is determined, where a subset of the plurality of affected nodes is then placed in a heap. One aspect of the present invention is that not all the affected nodes are placed in the heap. In one embodiment, the present reduced heap approach only applies the Dijkstra's algorithm to those affected nodes whose distances change in a smaller amount that the change in the arc weight. In turn, the shortest path graph or the shortest path tree is updated in accordance with the affected nodes placed in the heap.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile