Abstract: Nodes and methods are disclosed for protection and restoration to protect against multiple failures for multiple paths involved for the same service in mesh networks, including, determining, by circuitry of a first node in a mesh network, a failure of a working path between the first node and a second node, wherein the second node, when triggered by the failure of the working path, switches to a protection path. Methods further include establishing through transmission of at least one signal by circuitry of the first node at least one recovery path, for example, a restored-working path, after determining the failure of the at least one working path, wherein the at least one restored-working path carries a duplicate of the data traffic transmitted on the protection path in case of failure of the protection path.
Type:
Grant
Filed:
March 29, 2013
Date of Patent:
September 1, 2015
Assignee:
Infinera Coporation
Inventors:
Rajan Rao, Abhijit Kulkarni, Muhammad Yaaseen, Biao Lu, Mohit Misra, Anthony W. Jorgenson, Tjandra Trisno, Yalin Wang, Khuzema Pithewan, Keshava M. Elliadka
Abstract: An optical equalizer/dispersion compensator (E/CDC) comprises an input/output for receiving a multiplexed channel signal comprising a plurality of channel signals of different wavelengths. An optical amplifier may be coupled to receive, as an input/output, the multiplexed channel signals which amplifier may be a semiconductor optical amplifier (SOA) or a gain clamped-semiconductor optical amplifier (GC-SOA). A variable optical attenuator (VOA) is coupled to the optical amplifier and a chromatic dispersion compensator (CDC) is coupled to the variable optical attenuator.
Type:
Application
Filed:
October 22, 2004
Publication date:
May 26, 2005
Applicant:
Infinera Coporation
Inventors:
Stephen Grubb, Charles Joyner, Frank Peters, Fred Kish, Drew Perkins