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:
Jan. 18, 2011
Filed:
Nov. 04, 2003
Michael Ellsworth Weedmark, Dunrobin, CA;
Carl Rajsic, Nepean, CA;
Michael Ellsworth Weedmark, Dunrobin, CA;
Carl Rajsic, Nepean, CA;
Alcatel Lucent, Paris, FR;
Abstract
A method and apparatus are provided for protecting a connection during implementation of an Active Connection Modify request. Before initiating the ACM request, an alternate connection between the source node and the destination node of the connection are established using Domain-Based Rerouting. The alternate connection may be established in conformance either with the traffic parameters of the existing connection or with the new traffic parameters specified in the ACM request. If the connection along the original connection is to be torn as a result of lost ACM signaling messages, the connection is first switched to the alternate connection in a hitless manner. If the alternate connection is established in conformance with the new traffic parameters, and the ACM request can not be implemented along the original connection, due for example to resource shortage along the original connection, then the connection is switched to the alternate connection in a hitless manner. In this way, connections are protected in the event of lost ACM messages resulting from signal congestion, and the ACM may be implemented even in the event of resource shortage along the original connection.