Patents by Inventor Robert Doverspike
Robert Doverspike 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: 9215166Abstract: A method includes receiving, at a first node of a data network, a message indicating a failure of a communication link of the data network. The message is received at the first node from a second node of the data network. The method includes determining an alternate route from the first node to a data source of the data network. The alternate route includes a third node as an upstream node of the first node. The method includes determining whether the third node is a downstream node of the first node prior to sending a first join message from the first node to the third node, and sending the first join message from the first node to the third node conditioned on determining that the third node is not a downstream node of the first node.Type: GrantFiled: April 30, 2013Date of Patent: December 15, 2015Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Kadangode Ramakrishnan, Robert Doverspike, Murat Yuksel
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Patent number: 8897641Abstract: A method of providing routes through heterogeneous subsystems in an optical network is disclosed, which includes generating, using a processing device, a reachability matrix based on subnetwork information; and generating, using the processing device, a topology associated with the optical network using the reachability matrix. The method also includes determining, using the processing device, a shortest path through the optical network using the reachability matrix and a cost model graph; and displaying, using a graphical user interface, subsystems associated with the shortest path, regeneration locations associated with the shortest path, wavelengths associated with the shortest path, the topology, and the shortest path. Corresponding apparatus and computer-readable storage media are also disclosed.Type: GrantFiled: April 22, 2013Date of Patent: November 25, 2014Assignee: AT&T Intellectual Property I, L.P.Inventors: Robert Doverspike, Guangzhi Li, Angela Lan Chiu, Monica Gerhardstein, Yici Guo, Dongmei Wang, Dahai Xu
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Patent number: 8824461Abstract: Method and apparatus for providing a control plane across multiple optical network domains is described. In one example, topology and resource discovery is employed in a transport network having a plurality of control domains. Topology information for each of the control domains is summarized to produce summarized topology information. The summarized topology information for each of the control domains is exchanged among the control domains. At each of the control domains, the summarized topology information of each of the control domains is combined to produce combined topology information. The combined topology information is passed among network elements within each of the control domains using an intra-domain routing protocol.Type: GrantFiled: June 17, 2013Date of Patent: September 2, 2014Assignee: AT&T Intellectual Property II, L.P.Inventors: Robert Doverspike, Albert G. Greenberg, Guangzhi Li, Dongmei Wang, Jennifer Yates, Joel M. Gottlieb, Charles Robert Kalmanek, Panagiotis Sebos
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Patent number: 8611232Abstract: A resilient load balancing method uses fixed paths and a fixed path-splitting strategy to enable ingress routers to efficiently reroute traffic after a failure. An off-line management system computes a set of fixed paths and a set of splitting ratios for routing demand from ingress routers to egress routers, with sufficient capacity to meet demands under each failure scenario. That data is then used by the ingress router to reroute demand after observing a failure.Type: GrantFiled: March 7, 2013Date of Patent: December 17, 2013Assignee: AT&T Intellectual Property I, L.P.Inventors: Dahai Xu, Robert Doverspike, David Johnson, Jennifer Rexford, Martin Suchara
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Publication number: 20130235717Abstract: A method includes receiving, at a first node of a data network, a message indicating a failure of a communication link of the data network. The message is received at the first node from a second node of the data network. The method includes determining an alternate route from the first node to a data source of the data network. The alternate route includes a third node as an upstream node of the first node. The method includes determining whether the third node is a downstream node of the first node prior to sending a first join message from the first node to the third node, and sending the first join message from the first node to the third node conditioned on determining that the third node is not a downstream node of the first node.Type: ApplicationFiled: April 30, 2013Publication date: September 12, 2013Applicant: AT&T Intellectual Property I, L.P.Inventors: Kadangode Ramakrishnan, Robert Doverspike, Murat Yuksel
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Publication number: 20130236176Abstract: A method of providing routes through heterogeneous subsystems in an optical network is disclosed, which includes generating, using a processing device, a reachability matrix based on subnetwork information; and generating, using the processing device, a topology associated with the optical network using the reachability matrix. The method also includes determining, using the processing device, a shortest path through the optical network using the reachability matrix and a cost model graph; and displaying, using a graphical user interface, subsystems associated with the shortest path, regeneration locations associated with the shortest path, wavelengths associated with the shortest path, the topology, and the shortest path. Corresponding apparatus and computer-readable storage media are also disclosed.Type: ApplicationFiled: April 22, 2013Publication date: September 12, 2013Applicant: AT&T Intellectual Property I, LPInventors: Robert Doverspike, Guangzhi Li, Angela Lan Chiu, Monica Gerhardstein, Yici Guo, Dongmei Wang, Dahai Xu
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Patent number: 8467382Abstract: Method and apparatus for providing a control plane across multiple optical network domains is described. In one example, topology and resource discovery is employed in a transport network having a plurality of control domains. Topology information for each of the control domains is summarized to produce summarized topology information. The summarized topology information for each of the control domains is exchanged among the control domains. At each of the control domains, the summarized topology information of each of the control domains is combined to produce combined topology information. The combined topology information is passed among network elements within each of the control domains using an intra-domain routing protocol.Type: GrantFiled: December 22, 2005Date of Patent: June 18, 2013Assignee: AT&T Intellectual Property II, L.P.Inventors: Robert Doverspike, Albert Greenberg, Guangzhi Li, Dongmei Wang, Jennifer Yates, Joel M. Gottleib, Charles Robert Kalmanek, Panagiotis Sebos
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Patent number: 8462621Abstract: Systems and methods of multicast configuration are provided. A particular method includes detecting a failure in the data network at a first node of a data network. The method also includes determining an alternate route from the first node to a data source of the data network. The alternate route includes a second node as an upstream node. The method further includes determining whether the alternate route would create a loop in the data network. The method includes setting a state of the first node to a waiting-to-join the second node state when the alternate route would create a loop.Type: GrantFiled: July 27, 2009Date of Patent: June 11, 2013Assignee: AT&T Intellectual Property I, L.P.Inventors: Kadangode Ramakrishnan, Robert Doverspike, Murat Yuksel
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Patent number: 8452176Abstract: A method of providing routes through heterogeneous subsystems in an optical network is disclosed, which includes generating, using a processing device, a reachability matrix based on subnetwork information; and generating, using the processing device, a topology associated with the optical network using the reachability matrix. The method also includes determining, using the processing device, a shortest path through the optical network using the reachability matrix and a cost model graph; and displaying, using a graphical user interface, subsystems associated with the shortest path, regeneration locations associated with the shortest path, wavelengths associated with the shortest path, the topology, and the shortest path. Corresponding apparatus and computer-readable storage media are also disclosed.Type: GrantFiled: February 18, 2011Date of Patent: May 28, 2013Assignee: AT&T Intellectual Property I, LPInventors: Robert Doverspike, Guangzhi Li, Angela Lan Chiu, Monica Gerhardstein, Yici Guo, Dongmei Wang, Dahai Xu
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Patent number: 8422379Abstract: A resilient load balancing method uses fixed paths and a fixed path-splitting strategy to enable ingress routers to efficiently reroute traffic after a failure. An off-line management system computes a set of fixed paths and a set of splitting ratios for routing demand from ingress routers to egress routers, with sufficient capacity to meet demands under each failure scenario. That data is then used by the ingress router to reroute demand after observing a failure.Type: GrantFiled: December 15, 2009Date of Patent: April 16, 2013Assignee: AT&T Intellectual Property I, LPInventors: Dahai Xu, Robert Doverspike, David Johnson, Jennifer Rexford, Martin Suchara
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Publication number: 20120213520Abstract: A method of providing routes through heterogeneous subsystems in an optical network is disclosed, which includes generating, using a processing device, a reachability matrix based on subnetwork information; and generating, using the processing device, a topology associated with the optical network using the reachability matrix. The method also includes determining, using the processing device, a shortest path through the optical network using the reachability matrix and a cost model graph; and displaying, using a graphical user interface, subsystems associated with the shortest path, regeneration locations associated with the shortest path, wavelengths associated with the shortest path, the topology, and the shortest path. Corresponding apparatus and computer-readable storage media are also disclosed.Type: ApplicationFiled: February 18, 2011Publication date: August 23, 2012Applicant: AT&T INTELLECTUAL PROPERTY I LPInventors: Robert Doverspike, Guangzhi Li, Angela Lan Chiu, Monica Gerhardstein, Yici Guo, Dongmei Wang, Dahai Xu
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Publication number: 20110141877Abstract: A resilient load balancing method uses fixed paths and a fixed path-splitting strategy to enable ingress routers to efficiently reroute traffic after a failure. An off-line management system computes a set of fixed paths and a set of splitting ratios for routing demand from ingress routers to egress routers, with sufficient capacity to meet demands under each failure scenario. That data is then used by the ingress router to reroute demand after observing a failure.Type: ApplicationFiled: December 15, 2009Publication date: June 16, 2011Inventors: Dahai Xu, Robert Doverspike, David Johnson, Jennifer Rexford, Martin Suchara
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Publication number: 20110019534Abstract: Systems and methods of multicast configuration are provided. A particular method includes detecting a failure in the data network at a first node of a data network. The method also includes determining an alternate route from the first node to a data source of the data network. The alternate route includes a second node as an upstream node. The method further includes determining whether the alternate route would create a loop in the data network. The method includes setting a state of the first node to a waiting-to-join the second node state when the alternate route would create a loop.Type: ApplicationFiled: July 27, 2009Publication date: January 27, 2011Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Kadangode Ramakrishnan, Robert Doverspike, Murat Yuksel
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Publication number: 20080043740Abstract: Label contention in a label switched network is resolved by applying a contention resolution scheme that reconciles policies for handling unidirectional and bidirectional label switched path setup.Type: ApplicationFiled: October 25, 2007Publication date: February 21, 2008Inventors: Robert Doverspike, Charles Kalmanek, Guangzhi Li, Jennifer Yates
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Publication number: 20050232144Abstract: A method of selecting a restoration path in a mesh telecommunication network is disclosed that advantageously is practical and flexible and may be pre-computed along with a service connection path during the setup of the connection. The information used to select the restoration path can be advantageously distributed among nodes in the network.Type: ApplicationFiled: June 16, 2005Publication date: October 20, 2005Inventors: Robert Doverspike, Charles Kalmanek, Guangzhi Li