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:
Oct. 07, 2014
Filed:
Sep. 19, 2008
Piero Castoldi, Pisa, IT;
Filippo Cugini, Fidenza, IT;
Nicola Sambo, Pisa, IT;
Isabella Cerutti, Pisa, IT;
Alessio Giorgetti, Pisa, IT;
Luca Valcarenghi, Pisa, IT;
Piero Castoldi, Pisa, IT;
Filippo Cugini, Fidenza, IT;
Nicola Sambo, Pisa, IT;
Isabella Cerutti, Pisa, IT;
Alessio Giorgetti, Pisa, IT;
Luca Valcarenghi, Pisa, IT;
Telefonaktiebolaget L M Ericsson (Publ), Stockholm, SE;
Abstract
A method of restoration for an optical network, the network comprising a plurality of nodes () interconnected with each other by optical links (), a subset of the nodes () each comprising a regenerator, the method comprising: storing) a quality of transmission parameter and a regenerator availability at each of the plurality of nodes (); notifying () a branch node () in response to detecting a failure () within a link () forming part of the path between a source node () and a destination node (), wherein the branch node () is the neighbouring upstream node () upstream of the link failure (), the branch node () having a regenerator; the branch node () computing () a restoration segment () to a merge node () having a regenerator which is a neighbouring downstream node which is downstream of the link failure (), the restoration path () being based on the quality of transmission parameter and regenerator availability information; restoring () the path between the source node () and the destination node () using the restoration segment ().