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:
Nov. 25, 2003
Filed:
Sep. 22, 1998
Gopal K. Dommety, Columbus, OH (US);
Malathi Veeraraghavan, Atlantic Highlands, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A handoff scheme for a communications network is disclosed. In a first embodiment a procedure for finding an optimal path between an originating network node and a destination network node is integrated in the handoff procedure. An optimally routed connection is obtained by first determining an optimal “crossover node” along the existing path and then the handoff is effected by altering the existing connection route so that it travels along the existing path until it reaches the crossover node, where the path then varies from the original route, and a new segment between the crossover node and the new location is established. Then the call is switched to the new segment and the corresponding old segment on the old connection is released. In an alternative embodiment, the handoff procedure is performed first by completing a fast reroute connection using a prior art path extension method. This results in a quick, but sub-optimal handoff connection. Once the handoff is completed, the route is optimized by selecting a segment on the sub-optimal connection for rerouting and then utilizing the method of the first embodiment to establish an optimally routed connection.