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).

  • Patent number: 9215166
    Abstract: 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: Grant
    Filed: April 30, 2013
    Date of Patent: December 15, 2015
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Kadangode Ramakrishnan, Robert Doverspike, Murat Yuksel
  • Patent number: 8897641
    Abstract: 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: Grant
    Filed: April 22, 2013
    Date of Patent: November 25, 2014
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Robert Doverspike, Guangzhi Li, Angela Lan Chiu, Monica Gerhardstein, Yici Guo, Dongmei Wang, Dahai Xu
  • Patent number: 8824461
    Abstract: 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: Grant
    Filed: June 17, 2013
    Date of Patent: September 2, 2014
    Assignee: 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
  • Patent number: 8611232
    Abstract: 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: Grant
    Filed: March 7, 2013
    Date of Patent: December 17, 2013
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Dahai Xu, Robert Doverspike, David Johnson, Jennifer Rexford, Martin Suchara
  • Publication number: 20130235717
    Abstract: 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: Application
    Filed: April 30, 2013
    Publication date: September 12, 2013
    Applicant: AT&T Intellectual Property I, L.P.
    Inventors: Kadangode Ramakrishnan, Robert Doverspike, Murat Yuksel
  • Publication number: 20130236176
    Abstract: 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: Application
    Filed: April 22, 2013
    Publication date: September 12, 2013
    Applicant: AT&T Intellectual Property I, LP
    Inventors: Robert Doverspike, Guangzhi Li, Angela Lan Chiu, Monica Gerhardstein, Yici Guo, Dongmei Wang, Dahai Xu
  • Patent number: 8467382
    Abstract: 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: Grant
    Filed: December 22, 2005
    Date of Patent: June 18, 2013
    Assignee: 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
  • Patent number: 8462621
    Abstract: 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: Grant
    Filed: July 27, 2009
    Date of Patent: June 11, 2013
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Kadangode Ramakrishnan, Robert Doverspike, Murat Yuksel
  • Patent number: 8452176
    Abstract: 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: Grant
    Filed: February 18, 2011
    Date of Patent: May 28, 2013
    Assignee: AT&T Intellectual Property I, LP
    Inventors: Robert Doverspike, Guangzhi Li, Angela Lan Chiu, Monica Gerhardstein, Yici Guo, Dongmei Wang, Dahai Xu
  • Patent number: 8422379
    Abstract: 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: Grant
    Filed: December 15, 2009
    Date of Patent: April 16, 2013
    Assignee: AT&T Intellectual Property I, LP
    Inventors: Dahai Xu, Robert Doverspike, David Johnson, Jennifer Rexford, Martin Suchara
  • Publication number: 20120213520
    Abstract: 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: Application
    Filed: February 18, 2011
    Publication date: August 23, 2012
    Applicant: AT&T INTELLECTUAL PROPERTY I LP
    Inventors: Robert Doverspike, Guangzhi Li, Angela Lan Chiu, Monica Gerhardstein, Yici Guo, Dongmei Wang, Dahai Xu
  • Publication number: 20110141877
    Abstract: 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: Application
    Filed: December 15, 2009
    Publication date: June 16, 2011
    Inventors: Dahai Xu, Robert Doverspike, David Johnson, Jennifer Rexford, Martin Suchara
  • Publication number: 20110019534
    Abstract: 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: Application
    Filed: July 27, 2009
    Publication date: January 27, 2011
    Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Kadangode Ramakrishnan, Robert Doverspike, Murat Yuksel
  • Publication number: 20080043740
    Abstract: 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: Application
    Filed: October 25, 2007
    Publication date: February 21, 2008
    Inventors: Robert Doverspike, Charles Kalmanek, Guangzhi Li, Jennifer Yates
  • Publication number: 20050232144
    Abstract: 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: Application
    Filed: June 16, 2005
    Publication date: October 20, 2005
    Inventors: Robert Doverspike, Charles Kalmanek, Guangzhi Li