Patents by Inventor Robert Duncan Doverspike
Robert Duncan 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: 10419783Abstract: A system includes a processor and a memory. The memory stores instructions that, when executed by the processor, cause the processor to perform operations including sending, via a transmitter, a primary video stream corresponding to a particular channel to a media device. The operations further include sending a secondary video stream to the media device. The secondary video stream is associated with a lower quality level than the primary video stream. Transmission of a frame of the secondary video stream is delayed with respect to transmission of a corresponding frame of the primary video stream.Type: GrantFiled: April 19, 2017Date of Patent: September 17, 2019Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Kadangode Ramakrishnan, Charles Robert Kalmanek, Jr., Robert Duncan Doverspike, William C. Fenner
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Publication number: 20170223388Abstract: A system includes a processor and a memory. The memory stores instructions that, when executed by the processor, cause the processor to perform operations including sending, via a transmitter, a primary video stream corresponding to a particular channel to a media device. The operations further include sending a secondary video stream to the media device. The secondary video stream is associated with a lower quality level than the primary video stream. Transmission of a frame of the secondary video stream is delayed with respect to transmission of a corresponding frame of the primary video stream.Type: ApplicationFiled: April 19, 2017Publication date: August 3, 2017Inventors: Kadangode Ramakrishnan, Charles Robert Kalmanek, Jr., Robert Duncan Doverspike, William C. Fenner
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Patent number: 9661358Abstract: A system includes a processor and a memory. The memory stores instructions that, when executed by the processor, cause the processor to perform operations including sending a primary multicast video stream and a secondary multicast video stream to a media device. The secondary multicast video stream is limited to intra-coded frames (I-frames) extracted from the primary multicast video stream. Transmission of each intra-coded frame (I-frame) of the secondary multicast video stream is delayed with respect to transmission of a corresponding I-frame of the primary multicast video stream. The delay is based on an amount of writing time to satisfy a buffer threshold of a video content buffer at the media device to prevent a noticeable time shift of video displayed by the media device when the media device switches from outputting the secondary multicast video stream to outputting the primary multicast video stream.Type: GrantFiled: July 1, 2014Date of Patent: May 23, 2017Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.Inventors: Kadangode Ramakrishnan, Charles Robert Kalmanek, Jr., Robert Duncan Doverspike, William C. Fenner
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Patent number: 9264344Abstract: A method and apparatus for providing a route recommendation are disclosed. For example, the method obtains network topology information, wherein the network topology information comprises a plurality of underlying subnetwork types for a network. The method creates a cost model for the network, and receives a request from a user for a connection to be supported by the network. The method provides the route recommendation for supporting the connection by applying the cost model.Type: GrantFiled: March 23, 2015Date of Patent: February 16, 2016Assignee: AT&T Intellectual Property I, L.P.Inventors: Guangzhi Li, Angela Lan Chiu, Chris Dailey, Robert Duncan Doverspike, Monica Naukam Gerhardstein, Dah-Min David Hwang, Dongmei Wang, Dahai Xu
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Publication number: 20150195186Abstract: A method and apparatus for providing a route recommendation are disclosed. For example, the method obtains network topology information, wherein the network topology information comprises a plurality of underlying subnetwork types for a network. The method creates a cost model for the network, and receives a request from a user for a connection to be supported by the network. The method provides the route recommendation for supporting the connection by applying the cost model.Type: ApplicationFiled: March 23, 2015Publication date: July 9, 2015Inventors: GUANGZHI LI, Angela Lan Chiu, Chris Dailey, Robert Duncan Doverspike, Monica Naukam Gerhardstein, Dah-Min David Hwang, Dongmei Wang, Dahai Xu
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Patent number: 8989018Abstract: A method and apparatus for providing a route recommendation are disclosed. For example, the method obtains network topology information, wherein the network topology information comprises a plurality of underlying subnetwork types for a network. The method creates a cost model for the network, and receives a request from a user for a connection to be supported by the network. The method provides the route recommendation for supporting the connection by applying the cost model.Type: GrantFiled: October 11, 2010Date of Patent: March 24, 2015Assignee: AT&T Intellectual Property I, L.P.Inventors: Guangzhi Li, Angela Lan Chiu, Chris Dailey, Robert Duncan Doverspike, Monica Naukam Gerhardstein, Dah-Min David Hwang, Dongmei Wang, Dahai Xu
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Publication number: 20140317672Abstract: A system includes a processor and a memory. The memory stores instructions that, when executed by the processor, cause the processor to perform operations including sending a primary multicast video stream and a secondary multicast video stream to a media device. The secondary multicast video stream is limited to intra-coded frames (I-frames) extracted from the primary multicast video stream. Transmission of each intra-coded frame (I-frame) of the secondary multicast video stream is delayed with respect to transmission of a corresponding I-frame of the primary multicast video stream. The delay is based on an amount of writing time to satisfy a buffer threshold of a video content buffer at the media device to prevent a noticeable time shift of video displayed by the media device when the media device switches from outputting the secondary multicast video stream to outputting the primary multicast video stream.Type: ApplicationFiled: July 1, 2014Publication date: October 23, 2014Inventors: Kadangode Ramakrishnan, Charles Robert Kalmanek, JR., Robert Duncan Doverspike, William C. Fenner
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Patent number: 8813141Abstract: A method of providing video content is disclosed that includes receiving video content associated with a television stream from a video source at a server of a video distribution network. The method also includes sending a primary multicast video stream corresponding to the video content to a video distribution network entity via an Internet Protocol (IP) network. The primary multicast video stream is associated with a first bandwidth. Further, the method includes sending a secondary multicast video stream to the video distribution network entity via the IP network. The secondary multicast video stream is associated with a second bandwidth. The primary multicast video stream and the secondary multicast video stream are accessible to a set-top box device via the video distribution network entity in response to a channel change request that indicates the television stream.Type: GrantFiled: August 8, 2007Date of Patent: August 19, 2014Assignee: AT&T Intellectual Properties I, L.P.Inventors: Kadangode Ramakrishnan, Charles Robert Kalmanek, Jr., Robert Duncan Doverspike, William C. Fenner
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Patent number: 8761601Abstract: Systems and methods are described that that dynamically configure high-speed data link lightpaths between access routers and backbone routers at geographically dispersed locations to reassign traffic when a backbone router fails or is removed from service. Embodiments reduce the quantity of backbone router ports used in dual backbone router-homed networks.Type: GrantFiled: February 15, 2013Date of Patent: June 24, 2014Inventors: Robert Duncan Doverspike, Rakesh Kumar Sinha, Peter D. Magill, Jennifer Yates
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Patent number: 8750161Abstract: In a tool for use by network planners in designing metropolitan IP aggregation networks, several optimization methods are integrated into a tool. A k-means algorithm is used to choose access packet switch locations. A dual-k-means algorithm is used to choose the backbone switch locations. Each access packet switch is dual homed to two backbone packet switches using two diverse paths. The diverse path configuration is found using a maxflow-mincost algorithm on a modified fiber map topology. The link topology connecting the backbone packet switches to each other is designed using a heuristic that creates a skeleton network topology and then adds express links one by one, testing each link to assure reduced overall network cost. The resulting network topology is then improved upon by local search.Type: GrantFiled: December 20, 2010Date of Patent: June 10, 2014Assignee: AT&T Intellectual Property I, L.P.Inventors: David Matthews, Promod Kumar Bhagat, Robert Duncan Doverspike, John Gregory Klincewicz, Jian Li, Guangzhi Li, David Frederick Lynch, Moshe Segal, Dongmei Wang
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Patent number: 8687956Abstract: Systems and methods are described that provide a distributed restoration signaling protocol for shared mesh restoration with standbys for transparent optical networks.Type: GrantFiled: July 26, 2012Date of Patent: April 1, 2014Assignee: AT&T Intellectual Property I, L.P.Inventors: Guangzhi Li, Angela Lan Chiu, Robert Duncan Doverspike, John L. Strand
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Patent number: 8532137Abstract: A method and architecture for Packet-Aware Transport Networks (PATN) which supports both packet and traditional TDM services and which leverages an assemblage of emerging technologies to provide efficient aggregation and switching of packet traffic in metro networks. The PATN provides significant cost savings to carriers by reducing the number of network elements, reducing transport costs through statistical multiplexing, and eliminating the need for redundant multiplexing operations.Type: GrantFiled: March 26, 2004Date of Patent: September 10, 2013Assignee: AT&T Intellectual Property II, L.P.Inventors: Thomas Scott Afferton, Luis Aguirre-Torres, Robert Duncan Doverspike, Charles Robert Kalmanek, Jr., Kadangode K. Ramakrishnan
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Patent number: 8515280Abstract: Systems and methods are described that provide a two-step, physically-diverse optical routing. A diverse routing is formulated using Integer Linear Programming (ILP) to find feasible routes having a minimum estimated cost, and post-processing the feasible routes on an auxiliary cost graph to optimize regenerator and terminal Optical Transponder (OT) placement and wavelength assignment.Type: GrantFiled: December 13, 2010Date of Patent: August 20, 2013Assignee: AT&T Intellectual Property I, L.P.Inventors: Guangzhi Li, Angela Lan Chiu, Chris Dailey, Robert Duncan Doverspike, Monica Naukam Gerhardstein, Dongmei Wang, Dahai Xu
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Patent number: 8406622Abstract: Systems and methods are described that that dynamically configure high-speed data link lightpaths between access routers and backbone routers at geographically dispersed locations to reassign traffic when a backbone router fails or is removed from service. Embodiments reduce the quantity of backbone router ports used in dual backbone router-homed networks.Type: GrantFiled: August 6, 2009Date of Patent: March 26, 2013Assignee: AT&T Intellectual Property I, L.P.Inventors: Robert Duncan Doverspike, Rakesh Kumar Sinha, Peter D. Magill, Jennifer Yates
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Publication number: 20120308224Abstract: Systems and methods are described that provide a distributed restoration signaling protocol for shared mesh restoration with standbys for transparent optical networks.Type: ApplicationFiled: July 26, 2012Publication date: December 6, 2012Inventors: Guangzhi Li, Angela Lan Chiu, Robert Duncan Doverspike, John L. Strand
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Patent number: 8260133Abstract: Systems and methods are described that provide a distributed restoration signaling protocol for shared mesh restoration with standbys for transparent optical networks.Type: GrantFiled: September 4, 2009Date of Patent: September 4, 2012Assignee: AT&T Intellectual Property I, L.P.Inventors: Guangzhi Li, Angela Lan Chiu, Robert Duncan Doverspike, John L. Strand
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Publication number: 20120087665Abstract: A method and apparatus for providing a route recommendation are disclosed. For example, the method obtains network topology information, wherein the network topology information comprises a plurality of underlying subnetwork types for a network. The method creates a cost model for the network, and receives a request from a user for a connection to be supported by the network. The method provides the route recommendation for supporting the connection by applying the cost model.Type: ApplicationFiled: October 11, 2010Publication date: April 12, 2012Inventors: GUANGZHI LI, Angela Lan Chiu, Chris Dailey, Robert Duncan Doverspike, Monica Naukam Gerhardstein, Dah-Min David Hwang, Dongmei Wang, Dahai Xu
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Patent number: 8150257Abstract: Systems and methods are described for restoring wavelength services in mesh networks using pre-configured, standby lightpaths. The standby lightpaths are pre-cross-connected lightpaths that provide connectivity between switching nodes having a fiber link of degree-2 or higher. The restoration method overcomes the problem of optical impairments for long haul connections, avoids wavelength power balancing delays, provides wavelength conversion for capacity efficiency, and allows sharing of links across nonsimultaneous failures.Type: GrantFiled: June 20, 2008Date of Patent: April 3, 2012Assignee: AT&T Intellectual Property II, LPInventors: Gagan L. Choudhury, Angela Lan Chiu, Robert Duncan Doverspike, Guangzhi Li, John L. Strand
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Patent number: 8010694Abstract: Network performability characteristics with improved accuracy are derived by taking into account, in the various analyzed network failure states, attributes of elements at the logical level other than just the capacities of edges, as well as by taking into account one or more “abstract components,” such as scheduled maintenance, and by using multiple traffic matrices.Type: GrantFiled: March 13, 2008Date of Patent: August 30, 2011Assignee: AT&T Intellectual Property II, L.P.Inventors: Robert Duncan Doverspike, Kostas Oikonomou, Rakesh K. Sinha
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Patent number: 7916657Abstract: Network performability characteristics with improved accuracy are derived by taking into account, in the various analyzed network failure states, attributes of elements at the logical level other than just the capacities of edges, as well as by taking into account one or more “abstract components,” such as scheduled maintenance, and by using multiple traffic matrices.Type: GrantFiled: March 13, 2008Date of Patent: March 29, 2011Assignee: AT&T Intellectual Property II, L.P.Inventors: Robert Duncan Doverspike, Kostas Oikonomou, Rakesh K. Sinha