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:
Jul. 06, 2004
Filed:
Aug. 30, 1999
George Nicos Ellinas, New York, NY (US);
Thomas E. Stern, Riverdale, NY (US);
The Trustees of Columbia University in the City of New York, New York, NY (US);
Abstract
A system and method of automatic protection switching for a network ( ) which protect against link or node failure. The protection fibers ( ) in the links are pre-arranged into protection cycles so that if a link failure occurs, protection switches in the network nodes ( ) connected in the failed link will switch the working fiber data path onto an alternate path comprised of protection fibers ( ). Data can then be transmitted through the protection cycle around the fault to reach the node on the other side of the failed link. The same protection fibers ( ) can be used to protect a priority connection against center switch failure in a network. The protection switches in each node ( ) which connect working fibers ( ) to protection fibers ( ) are very fast and their settings do not depend on the state of the network.