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:
Aug. 24, 2004
Filed:
Nov. 10, 2000
Applicant:
Inventor:
Gang Liu, North Plainfield, NJ (US);
Assignee:
Lucent Technologies Inc., Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 1/008 ;
U.S. Cl.
CPC ...
H04B 1/008 ;
Abstract
Recovery from link failure in a WDM ring network is implemented by forming an active ring and a protection ring through the same nodes. Failure in any wavelength channel of a link causes a node adjacent to the link to reroute any subsequent incoming signal from the source node and on the active ring to the protection ring and in an opposite direction. The oppositely directed signal is rerouted again at the other adjacent node back to the active ring to arrive at the destination node. The physical ring serving as the active ring to odd wavelength channels serves as the protection ring to even wavelength channels, and vice versa.