公开(公告)号：US10863255B2

公开(公告)日：2020-12-08

申请号：US16386309

申请日：2019-04-17

Applicant: Cisco Technology, Inc.

Inventor： Randy Zhang ,  Gabriele Maria Galimberti ,  Stefano Piciaccia ,  Mauro Brunella

IPC: H04Q11/00 ,  H04L12/703 ,  H04L12/707

Abstract: A method for optical restoration in an optical network is provided. A network controller obtains, from one or more optical nodes of an optical network, at least one failure notification indicating a failure of a primary path between a first node and a second node. The network controller forwards to a first set of optical nodes, data-plane parameters for optical components of the first set of optical nodes. The first set of optical nodes include the first node, the second node, and one or more intermediate nodes, and forms a restoration path for the primary path. The data-plane parameters for the optical components are forwarded in parallel to the first set of optical nodes of the restoration path so as to activate the restoration path in parallel. The network controller switches traffic from the primary path to the restoration path.

公开(公告)号：US09736558B2

公开(公告)日：2017-08-15

申请号：US14158457

申请日：2014-01-17

Applicant: Cisco Technology, Inc.

Inventor： Giovanni Martinelli ,  Jean-Philippe Vasseur ,  Gabriele Maria Galimberti

IPC: H04B17/00 ,  H04Q11/00 ,  H04B10/038 ,  H04L12/707 ,  H04L12/703

CPC classification number: H04B10/038 ,  H04J14/0221 ,  H04J14/0293 ,  H04L45/22 ,  H04L45/28 ,  H04Q11/0005 ,  H04Q11/0066 ,  H04Q11/0067 ,  H04Q2011/0011 ,  H04Q2011/0016 ,  H04Q2011/0081

Abstract: The embodiments disclosed herein provide fast recovery of a network signal path by, in the event of a failure or unacceptable degradation in a signal in the original network path, diverting the optical signal passing through the network to a preselected bypass optical path which is maintained in a warm or operational state. The optical elements on the bypass optical path are available network resources which may, during part or all of the time the bypass path is designated for a node in the primary optical path, be in use to transmit other optical signals in the network. By maintaining the resources in the designated bypass path in a warm or operating state, fast rerouting and recovery of an interrupted signal is possible.

公开(公告)号：US20200336809A1

公开(公告)日：2020-10-22

申请号：US16386309

申请日：2019-04-17

Applicant: Cisco Technology, Inc.

Inventor： Randy Zhang ,  Gabriele Maria Galimberti ,  Stefano Piciaccia ,  Mauro Brunella

IPC: H04Q11/00 ,  H04L12/703 ,  H04L12/707

Abstract: A method for optical restoration in an optical network is provided. A network controller obtains, from one or more optical nodes of an optical network, at least one failure notification indicating a failure of a primary path between a first node and a second node. The network controller forwards to a first set of optical nodes, data-plane parameters for optical components of the first set of optical nodes. The first set of optical nodes include the first node, the second node, and one or more intermediate nodes, and forms a restoration path for the primary path. The data-plane parameters for the optical components are forwarded in parallel to the first set of optical nodes of the restoration path so as to activate the restoration path in parallel. The network controller switches traffic from the primary path to the restoration path.

公开(公告)号：US10771182B2

公开(公告)日：2020-09-08

申请号：US15961903

申请日：2018-04-25

Applicant: Cisco Technology, Inc.

Inventor： Randy Zhang ,  Rajiv Asati ,  Gabriele Maria Galimberti

IPC: H04B10/08 ,  H04B17/00 ,  H04J14/02 ,  H04Q11/00 ,  H04L12/751

Abstract: In one embodiment, a first optical network device includes a controller, and a first network interface, wherein the first network interface is configured to exchange data with a first layer 3 network device, and the controller is configured to obtain at least one optical circuit attribute including an optical circuit distance and/or an optical circuit latency of a first optical circuit in an optical network, and provide the at least one optical circuit attribute to the first layer 3 network device. Related apparatus and methods are also described.

公开(公告)号：US10447551B1

公开(公告)日：2019-10-15

申请号：US16203930

申请日：2018-11-29

Applicant: Cisco Technology, Inc.

Inventor： Randy Hehui Zhang ,  Rajiv Asati ,  Gabriele Maria Galimberti ,  Errol Fenton Roberts ,  Walid Wakim

IPC: H04L12/24 ,  H04J14/02

Abstract: An interface mapping method includes obtaining, at a network controller, device information of network devices configured to be in communication with each other through an optical network. The network devices include a plurality of colored interfaces that support a range of wavelengths for communication in the optical network. Interface information of the colored interfaces of the network devices is obtained, and optical power information associated with each of the colored interfaces is obtained. Optical power margins for a transmitter interface of the colored interfaces. The transmitter interface is controlled to transmit a power sequence based on the optical power margins, and power readings are obtained from a receiver interface of the colored interfaces. A topology between the colored interfaces is discovered based on the power sequence and the power readings.