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:
Mar. 12, 2002
Filed:
Dec. 11, 1998
Tetsuo Shibuya, Yamato, JP;
Abstract
An efficient method and system is provided for searching for the shortest paths between a source and multiple destinations, and between multiple sources and multiple destinations. The speed of the conventional Dijkstra method, which is the basic calculation method, is increased by employing information concerning the relationship between a node and a set of destinations on a graph. The relationship information is constituted by the estimate function h(v) concerning a specific node v and a set T of destinations, where h(v) is a lower bound of all the shortest path lengths extending from node v to each of the destination sets T. Employment of the estimate function can increase the speed of the Dijkstra method.