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:
Jun. 15, 2010
Filed:
Aug. 15, 2001
Stephen Suryaputra, Malden, MA (US);
Indermohan S. Monga, Lexington, MA (US);
Bruce A. Schofield, Tyngsboro, MA (US);
Thomas P. Hardjono, Winchester, MA (US);
Stephen Suryaputra, Malden, MA (US);
Indermohan S. Monga, Lexington, MA (US);
Bruce A. Schofield, Tyngsboro, MA (US);
Thomas P. Hardjono, Winchester, MA (US);
Nortel Networks Limited, St. Laurent, Quebec, CA;
Abstract
A system, device, and method for managing alternate site switching in an optical communication system recovers from failures/degradations that are uncorrected by the core optical communication network. When an uncorrected failure/degradation is detected, communications for a protected end-system are switched from a primary end-system to a backup end-system. The backup end-system may be selected a priori, for example, during connection establishment, in order to reduce switching time once a decision has been made to switch communications from the primary end-system to the backup end-system. Provisions are made for completing the alternate site switching within a specified amount of time. Load balancing may be used to further reduce switching time from the primary end-system to the backup end-system. This alternate site switching augments the various protection mechanisms provided by the core optical communication network in order to provide end-to-end protection for the optical communication path.