Patents by Inventor Gabriele Maria Galimberti
Gabriele Maria Galimberti has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10863255Abstract: 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.Type: GrantFiled: April 17, 2019Date of Patent: December 8, 2020Assignee: CISCO TECHNOLOGY, INC.Inventors: Randy Zhang, Gabriele Maria Galimberti, Stefano Piciaccia, Mauro Brunella
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Publication number: 20200336809Abstract: 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.Type: ApplicationFiled: April 17, 2019Publication date: October 22, 2020Inventors: Randy Zhang, Gabriele Maria Galimberti, Stefano Piciaccia, Mauro Brunella
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Patent number: 10771182Abstract: 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.Type: GrantFiled: April 25, 2018Date of Patent: September 8, 2020Assignee: CISCO TECHNOLOGY, INC.Inventors: Randy Zhang, Rajiv Asati, Gabriele Maria Galimberti
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Publication number: 20190334650Abstract: 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.Type: ApplicationFiled: April 25, 2018Publication date: October 31, 2019Inventors: Randy ZHANG, Rajiv ASATI, Gabriele Maria GALIMBERTI
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Patent number: 10447551Abstract: 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.Type: GrantFiled: November 29, 2018Date of Patent: October 15, 2019Assignee: Cisco Technology, Inc.Inventors: Randy Hehui Zhang, Rajiv Asati, Gabriele Maria Galimberti, Errol Fenton Roberts, Walid Wakim
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Patent number: 9736558Abstract: 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.Type: GrantFiled: January 17, 2014Date of Patent: August 15, 2017Assignee: Cisco Technology, Inc.Inventors: Giovanni Martinelli, Jean-Philippe Vasseur, Gabriele Maria Galimberti
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Patent number: 9698910Abstract: In one embodiment, a network server layer provides disjoint channels in response to client-layer disjoint path requests. For example, the network layer can be an optical network, and the client layer may be a packet switching layer (e.g., label switching, Internet Protocol). In one embodiment, a server-layer node receives a client-layer disjoint path request to provide a server-layer channel through a server-layer network. The client-layer disjoint path request includes an identifier corresponding to an existing client-layer path that traverses a current channel through the server-layer network that does not include the server-layer node. The server-layer network determines a particular channel through the server-layer network that is disjoint to the current channel based on route information of the current channel, and then signaling is performed within the server-layer network to establish the particular channel.Type: GrantFiled: May 31, 2015Date of Patent: July 4, 2017Assignee: Cisco Technology, Inc.Inventors: Clarence Filsfils, Ornan Alexander Gerstel, Gabriele Maria Galimberti, Jean-Philippe Vasseur, David Delano Ward, Walid Wakim
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Publication number: 20150263811Abstract: In one embodiment, a network server layer provides disjoint channels in response to client-layer disjoint path requests. For example, the network layer can be an optical network, and the client layer may be a packet switching layer (e.g., label switching, Internet Protocol). In one embodiment, a server-layer node receives a client-layer disjoint path request to provide a server-layer channel through a server-layer network. The client-layer disjoint path request includes an identifier corresponding to an existing client-layer path that traverses a current channel through the server-layer network that does not include the server-layer node. The server-layer network determines a particular channel through the server-layer network that is disjoint to the current channel based on route information of the current channel, and then signaling is performed within the server-layer network to establish the particular channel.Type: ApplicationFiled: May 31, 2015Publication date: September 17, 2015Applicant: Cisco Technology, Inc., a corporation of CaliforniaInventors: Clarence Filsfils, Ornan Alexander Gerstel, Gabriele Maria Galimberti, Jean-Philippe Vasseur, David Delano Ward, Walid Wakim
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Publication number: 20150208147Abstract: 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.Type: ApplicationFiled: January 17, 2014Publication date: July 23, 2015Applicant: CISCO TECHNOLOGY, INC.Inventors: Giovanni MARTINELLI, Jean-Philippe VASSEUR, Gabriele Maria GALIMBERTI
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Patent number: 9049266Abstract: In one embodiment, a network server layer provides disjoint channels in response to client-layer disjoint path requests. For example, the network layer can be an optical network, and the client layer may be a packet switching layer (e.g., label switching, Internet Protocol). In one embodiment, a server-layer node receives a client-layer disjoint path request to provide a server-layer channel through a server-layer network. The client-layer disjoint path request includes an identifier corresponding to an existing client-layer path that traverses a current channel through the server-layer network that does not include the server-layer node. The server-layer network determines a particular channel through the server-layer network that is disjoint to the current channel based on route information of the current channel, and then signaling is performed within the server-layer network to establish the particular channel.Type: GrantFiled: March 13, 2013Date of Patent: June 2, 2015Assignee: Cisco Technology, Inc.Inventors: Clarence Filsfils, Ornan Alexander Gerstel, Gabriele Maria Galimberti, Jean-Philippe Vasseur, David Delano Ward, Walid Wakim
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Publication number: 20140270771Abstract: In one embodiment, a network server layer provides disjoint channels in response to client-layer disjoint path requests. For example, the network layer can be an optical network, and the client layer may be a packet switching layer (e.g., label switching, Internet Protocol). In one embodiment, a server-layer node receives a client-layer disjoint path request to provide a server-layer channel through a server-layer network. The client-layer disjoint path request includes an identifier corresponding to an existing client-layer path that traverses a current channel through the server-layer network that does not include the server-layer node. The server-layer network determines a particular channel through the server-layer network that is disjoint to the current channel based on route information of the current channel, and then signaling is performed within the server-layer network to establish the particular channel.Type: ApplicationFiled: March 13, 2013Publication date: September 18, 2014Inventors: Clarence Filsfils, Ornan Alexander Gerstel, Gabriele Maria Galimberti, Jean-Philippe Vasseur, David Delano Ward, Walid Wakim
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Patent number: 8565598Abstract: Techniques are provided for receiving a connection request at a first network node configured to request a connection from the first network node to a second network node. At the first network node, it is determined if a path to the second network node without an optical regenerator is available for the connection. In response to determining that a path without an optical regenerator is not available, a path to the second network node is determined that has a minimum number of optical regenerators. The connection is set up using the path with the minimum number of optical regenerators.Type: GrantFiled: May 3, 2010Date of Patent: October 22, 2013Assignee: Cisco Technology, Inc.Inventors: Ornan Gerstel, Gabriele Maria Galimberti, Giovanni Martinelli, Alberto Tanzi
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Patent number: 8295701Abstract: Techniques and a control architecture (apparatus and logic) are provided for an adaptive hybrid DWDM-aware computation scheme. The architecture is one that is a hybrid of a centralized control scheme and a distributed control scheme that performs adaptive physical impairment computations for an optical network. A central control server is connected to multiple client control devices each of which resides in a node in a dense wavelength division multiplexed (DWDM) optical network, wherein each client control device is part of an optical control plane associated with the optical network. The control server obtains data for path route analysis from the client control devices.Type: GrantFiled: July 17, 2009Date of Patent: October 23, 2012Assignee: Cisco Technology, Inc.Inventors: Maurizio Gazzola, David Bianchi, Stefano Piciaccia, Gabriele Maria Galimberti
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Patent number: 8184971Abstract: Methods and apparatus for efficiently utilizing an optical control plane distinct from an electronic control plane to facilitate the setup of paths in a dense wave division multiplexing network are disclosed. According to one aspect of the present invention, a method includes receiving a probe arranged determine the optical feasibility of a first path, and determining a probability of success associated with the probe. The probability of success indicates a likelihood that the probe will be successfully routed on the first path to the destination, and is associated with a particular wavelength. A second path on which to route the probe is dynamically identified if the probability indicates a low likelihood of successful routing on the first path. Finally, the method includes determining if a notification associated with the probe has been received, and altering the probability of success based on the notification if the notification has been received.Type: GrantFiled: December 19, 2007Date of Patent: May 22, 2012Assignee: Cisco Technology, Inc.Inventors: Jean Philippe Vasseur, Ornan Gerstal, Gabriele Maria Galimberti, Giovanni Martinelli
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Publication number: 20110268439Abstract: Techniques are provided for receiving a connection request at a first network node configured to request a connection from the first network node to a second network node. At the first network node, it is determined if a path to the second network node without an optical regenerator is available for the connection. In response to determining that a path without an optical regenerator is not available, a path to the second network node is determined that has a minimum number of optical regenerators. The connection is set up using the path with the minimum number of optical regenerators.Type: ApplicationFiled: May 3, 2010Publication date: November 3, 2011Applicant: CISCO TECHNOLOGY, INC.Inventors: Ornan Gerstel, Gabriele Maria Galimberti, Giovanni Martinelli, Alberto Tanzi
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Patent number: 8045477Abstract: Techniques are provided for detecting at a controller associated with a physical layer of a network an occurrence of a failure within the physical layer of the network. In response to detecting the failure, the controller sends messages to at least first and second nodes in a transport layer of the network, where the messages are configured to indicate normal operations in the physical layer so as to prevent execution of transport layer protection processes for a period of time.Type: GrantFiled: July 17, 2009Date of Patent: October 25, 2011Assignee: Cisco Technology, Inc.Inventors: Maurizio Gazzola, David Bianchi, Giovanni Martinelli, Gabriele Maria Galimberti
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Patent number: 7983558Abstract: An optical control plane (OCP) distinct from an electronic control plane helps the setup of path routes in a DWDM network. The OCP determines the optical feasibility of any path route selected by the electronic control plane, such as operated under GMPLS protocol, and asks the electronic control plane for another path route if the optical feasibility is determined to be negative. The OCP can be set in a server or distributed across the nodes of the network.Type: GrantFiled: April 2, 2007Date of Patent: July 19, 2011Assignee: Cisco Technology, Inc.Inventors: Ornan Gerstel, Gabriele Maria Galimberti, Jean-Philippe Vasseur, Giovanni Martinelli
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Publication number: 20110013908Abstract: Techniques and a control architecture (apparatus and logic) are provided for an adaptive hybrid DWDM-aware computation scheme. The architecture is one that is a hybrid of a centralized control scheme and a distributed control scheme that performs adaptive physical impairment computations for an optical network. A central control server is connected to multiple client control devices each of which resides in a node in a dense wavelength division multiplexed (DWDM) optical network, wherein each client control device is part of an optical control plane associated with the optical network. The control server obtains data for path route analysis from the client control devices.Type: ApplicationFiled: July 17, 2009Publication date: January 20, 2011Applicant: CISCO TECHNOLOGY, INC.Inventors: Maurizio Gazzola, David Bianchi, Stefano Piciaccia, Gabriele Maria Galimberti
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Publication number: 20110013507Abstract: Techniques are provided for detecting at a controller associated with a physical layer of a network an occurrence of a failure within the physical layer of the network. In response to detecting the failure, the controller sends messages to at least first and second nodes in a transport layer of the network, where the messages are configured to indicate normal operations in the physical layer so as to prevent execution of transport layer protection processes for a period of time.Type: ApplicationFiled: July 17, 2009Publication date: January 20, 2011Applicant: CISCO TECHNOLOGY, INC.Inventors: Maurizio Gazzola, David Bianchi, Giovanni Martinelli, Gabriele Maria Galimberti
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Patent number: 7809268Abstract: A method for integrating an Optical Service Channel (OSC) with a Quantum Key Distribution (QKD) channel across a DWDM network having a single mode optical fiber is provided. An optical signal is received. An OSC is coupled with the optical signal. A QKD channel is integrated with the OSC on the single mode optical fiber.Type: GrantFiled: March 13, 2006Date of Patent: October 5, 2010Assignee: Cisco Technology, Inc.Inventors: Fausto Meli, Gabriele Maria Galimberti