Patents by Inventor Kadangode Ramakrishnan

Kadangode Ramakrishnan 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: 10447776
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, initializing a boundary estimate for an optimization of a linear programming model describing a network of media servers for servicing requests for media content items from subscriber devices, where the boundary estimate is an estimate of an infeasible solution of the linear programming model, and calculating iteratively, using an exponential potential function, additional boundary estimates for the linear programming model, wherein the calculating resolves to an improved boundary estimate that corresponds to placement of copies of the media content items at the media servers subject to a set of constraints on storage capacity of media servers and on bandwidth for communication links in the network. Other embodiments are disclosed.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: October 15, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Aaron Francis Archer, Seungjoon Lee, David Lee Applegate, Kadangode Ramakrishnan, Vijay Gopalakrishnan
  • Patent number: 10419783
    Abstract: 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: Grant
    Filed: April 19, 2017
    Date of Patent: September 17, 2019
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Kadangode Ramakrishnan, Charles Robert Kalmanek, Jr., Robert Duncan Doverspike, William C. Fenner
  • Publication number: 20190199769
    Abstract: A method that incorporates teachings of the subject disclosure may include, for example performing, by a wireless communication device comprising a processor, wireless telephony communications via a first wireless interface, transmitting information associated with media-related activities to a server, receiving from the server a media recommendation that is generated according to the information associated with media-related activities, initiating communications with a network via a second wireless interface, downloading a media content item of the media recommendation from a content provider via the second wireless interface, and presenting the media content item at a display. Other embodiments are disclosed.
    Type: Application
    Filed: March 5, 2019
    Publication date: June 27, 2019
    Applicant: AT&T Intellectual Property I, L.P.
    Inventors: Kadangode Ramakrishnan, Yifan Hu, Robert Bell, Jeffrey Pang, Jeffrey Erman
  • Patent number: 10270828
    Abstract: A method that incorporates teachings of the subject disclosure may include, for example performing, by a wireless communication device comprising a processor, wireless telephony communications via a first wireless interface, transmitting information associated with media-related activities to a server, receiving from the server a media recommendation that is generated according to the information associated with media-related activities, initiating communications with a network via a second wireless interface, downloading a media content item of the media recommendation from a content provider via the second wireless interface, and presenting the media content item at a display. Other embodiments are disclosed.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: April 23, 2019
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Kadangode Ramakrishnan, Yifan Hu, Robert Bell, Jeffrey Pang, Jeffrey Erman
  • Publication number: 20180227362
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, initializing a boundary estimate for an optimization of a linear programming model describing a network of media servers for servicing requests for media content items from subscriber devices, where the boundary estimate is an estimate of an infeasible solution of the linear programming model, and calculating iteratively, using an exponential potential function, additional boundary estimates for the linear programming model, wherein the calculating resolves to an improved boundary estimate that corresponds to placement of copies of the media content items at the media servers subject to a set of constraints on storage capacity of media servers and on bandwidth for communication links in the network. Other embodiments are disclosed.
    Type: Application
    Filed: February 21, 2018
    Publication date: August 9, 2018
    Applicant: AT&T Intellectual Property I, L.P.
    Inventors: Aaron Francis Archer, Seungjoon Lee, David Lee Applegate, Kadangode Ramakrishnan, Vijay Gopalakrishnan
  • Patent number: 9942313
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, initializing a boundary estimate for an optimization of a linear programming model describing a network of media servers for servicing requests for media content items from subscriber devices, where the boundary estimate is an estimate of an infeasible solution of the linear programming model, and calculating iteratively, using an exponential potential function, additional boundary estimates for the linear programming model, wherein the calculating resolves to an improved boundary estimate that corresponds to placement of copies of the media content items at the media servers subject to a set of constraints on storage capacity of media servers and on bandwidth for communication links in the network. Other embodiments are disclosed.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: April 10, 2018
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Aaron Francis Archer, Seungjoon Lee, David Lee Applegate, Kadangode Ramakrishnan, Vijay Gopalakrishnan
  • Patent number: 9854023
    Abstract: A method for disseminating content over an overlay network having a plurality of routers in communication with providers and consumers of content is disclosed. A router in the overlay network receives a content descriptor corresponding to a query for content from a node, and generates a subscriber interface list based on the query for the content. The subscriber interface list is transmitted to a plurality of subsequent routers in the overlay network, wherein a content identified by the subsequent routers that correspond to the query will be routed to the router based on the subscriber interface list. The router receives first and second documents corresponding to the query for the content from the node. If the second document is the duplicate, the router deletes the second document and transmits the first document to the node or if not the router transmits both the first and second documents to the node.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: December 26, 2017
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Kadangode Ramakrishnan, William Fenner, Michael Rabinovich, Divesh Srivastava, Yin Zhang
  • Publication number: 20170223388
    Abstract: 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: Application
    Filed: April 19, 2017
    Publication date: August 3, 2017
    Inventors: Kadangode Ramakrishnan, Charles Robert Kalmanek, Jr., Robert Duncan Doverspike, William C. Fenner
  • Patent number: 9723343
    Abstract: A method includes forecasting demand for media content items of a media distribution system based on historical demand information to generate forecasted demand. The method includes generating a mixed integer program model based on storage constraints of a plurality of distribution nodes of the media distribution system, bandwidth constraints of the media distribution system, and the forecasted demand. The method includes performing a Lagrangian relaxation operation using the mixed integer program model. The method includes determining values of a cost function based on a result of the Lagrangian relaxation operation. The method includes assigning each of the media content items to a corresponding distribution node of the plurality of distribution nodes based on the cost function and the forecasted demand.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: August 1, 2017
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: David L. Applegate, Aaron F. Archer, Vijay Gopalakrishnan, Seungjoon Lee, Kadangode Ramakrishnan
  • Patent number: 9661358
    Abstract: 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: Grant
    Filed: July 1, 2014
    Date of Patent: May 23, 2017
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Kadangode Ramakrishnan, Charles Robert Kalmanek, Jr., Robert Duncan Doverspike, William C. Fenner
  • Publication number: 20170064350
    Abstract: A system for resource provisioning for content delivery of multiple services is disclosed. The system may be configured to offer multiple services, wherein at least one first offered service is delivery of prerecorded content and at least one second offered service is content delivered according to a deadline. In at least one embodiment, the first offered service may be video content, and the second offered service may be broadcast television content. The system may also be configured to deliver at least a portion of the first offered service in advance of use of that portion of the first offered service such that resource demand in connection with delivery of service content of the second offered service at peak delivery may be reduced. As such, fewer resources are needed to provide uninterrupted service of the first and second offered services.
    Type: Application
    Filed: November 16, 2016
    Publication date: March 2, 2017
    Applicant: AT&T Intellectual Property I, L.P.
    Inventors: Rittwik Jana, Vaneet Aggarwal, Xu Chen, Vijay Gopalakrishnan, Kadangode Ramakrishnan, Vinay Vaishampayan
  • Publication number: 20170034243
    Abstract: A method for disseminating content over an overlay network having a plurality of routers in communication with providers and consumers of content is disclosed. A router in the overlay network receives a content descriptor corresponding to a query for content from a node, and generates a subscriber interface list based on the query for the content. The subscriber interface list is transmitted to a plurality of subsequent routers in the overlay network, wherein a content identified by the subsequent routers that correspond to the query will be routed to the router based on the subscriber interface list. The router receives first and second documents corresponding to the query for the content from the node. If the second document is the duplicate, the router deletes the second document and transmits the first document to the node or if not the router transmits both the first and second documents to the node.
    Type: Application
    Filed: October 11, 2016
    Publication date: February 2, 2017
    Applicant: AT&T Intellectual Property II, L.P.
    Inventors: Kadangode Ramakrishnan, William Fenner, Michael Rabinovich, Divesh Srivastava, Yin Zhang
  • Publication number: 20160373819
    Abstract: A method of receiving content includes joining an in-progress multicast stream to receive a first portion of a content. The method further includes sending a request to a peer for a catch-up portion of the content, the request including a deadline for delivery of the content, and receiving the catch-up portion of the content from the peer prior to the deadline.
    Type: Application
    Filed: September 1, 2016
    Publication date: December 22, 2016
    Inventors: KADANGODE RAMAKRISHNAN, RITTWIK JANA, DIVESH SRIVASTAVA, VIJAY GOPALAKRISHNAN, SAMRAT BHATTACHARJEE
  • Patent number: 9521183
    Abstract: A method for disseminating content over an overlay network having a plurality of routers in communication with providers and consumers of content is disclosed. A router in the overlay network receives a content descriptor corresponding to a query for content from a node, and generates a subscriber interface list based on the query for the content. The subscriber interface list is transmitted to a plurality of subsequent routers in the overlay network, wherein a content identified by the subsequent routers that correspond to the query will be routed to the router based on the subscriber interface list. The router receives first and second documents corresponding to the query for the content from the node. If the second document is the duplicate, the router deletes the second document and transmits the first document to the node or if not the router transmits both the first and second documents to the node.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: December 13, 2016
    Assignee: AT&T INTELLECTUAL PROPERTY II, L.P.
    Inventors: Kadangode Ramakrishnan, William Fenner, Michael Rabinovich, Divesh Srivastava, Yin Zhang
  • Patent number: 9516368
    Abstract: A system for resource provisioning for content delivery of multiple services is disclosed. The system may be configured to offer multiple services, wherein at least one first offered service is delivery of prerecorded content and at least one second offered service is content delivered according to a deadline. In at least one embodiment, the first offered service may be video content, and the second offered service may be broadcast television content. The system may also be configured to deliver at least a portion of the first offered service in advance of use of that portion of the first offered service such that resource demand in connection with delivery of service content of the second offered service at peak delivery may be reduced. As such, fewer resources are needed to provide uninterrupted service of the first and second offered services.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: December 6, 2016
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Rittwik Jana, Vaneet Aggarwal, Xu Chen, Vijay Gopalakrishnan, Kadangode Ramakrishnan, Vinay Vaishampayan
  • Publication number: 20160301747
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, initializing a boundary estimate for an optimization of a linear programming model describing a network of media servers for servicing requests for media content items from subscriber devices, where the boundary estimate is an estimate of an infeasible solution of the linear programming model, and calculating iteratively, using an exponential potential function, additional boundary estimates for the linear programming model, wherein the calculating resolves to an improved boundary estimate that corresponds to placement of copies of the media content items at the media servers subject to a set of constraints on storage capacity of media servers and on bandwidth for communication links in the network. Other embodiments are disclosed.
    Type: Application
    Filed: June 23, 2016
    Publication date: October 13, 2016
    Inventors: Aaron Francis Archer, SEUNGJOON LEE, DAVID LEE APPLEGATE, KADANGODE RAMAKRISHNAN, VIJAY GOPALAKRISHNAN
  • Patent number: 9462339
    Abstract: A method of receiving content includes joining an in-progress multicast stream to receive a first portion of a content. The method further includes sending a request to a peer for a catch-up portion of the content, the request including a deadline for delivery of the content, and receiving the catch-up portion of the content from the peer prior to the deadline.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: October 4, 2016
    Assignee: AT&T Intellectual Property II, L.P.
    Inventors: Kadangode Ramakrishnan, Rittwik Jana, Divesh Srivastava, Vijay Gopalakrishnan, Samrat Bhattacharjee
  • Patent number: 9407676
    Abstract: A system that incorporates teachings of the present disclosure may include, for example, initializing a boundary estimate for an optimization of a linear programming model describing a network of media servers for servicing requests for media content items from subscriber devices, where the boundary estimate is an estimate of an infeasible solution of the linear programming model, and calculating iteratively, using an exponential potential function, additional boundary estimates for the linear programming model, wherein the calculating resolves to an improved boundary estimate that corresponds to placement of copies of the media content items at the media servers subject to a set of constraints on storage capacity of media servers and on bandwidth for communication links in the network. Other embodiments are disclosed.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: August 2, 2016
    Assignee: AT&T INTELLECTUAL PROPERTY I, LP
    Inventors: Aaron Francis Archer, Seungjoon Lee, David Lee Applegate, Kadangode Ramakrishnan, Vijay Gopalakrishnan
  • Publication number: 20160205161
    Abstract: A method that incorporates teachings of the subject disclosure may include, for example performing, by a wireless communication device comprising a processor, wireless telephony communications via a first wireless interface, transmitting information associated with media-related activities to a server, receiving from the server a media recommendation that is generated according to the information associated with media-related activities, initiating communications with a network via a second wireless interface, downloading a media content item of the media recommendation from a content provider via the second wireless interface, and presenting the media content item at a display. Other embodiments are disclosed.
    Type: Application
    Filed: March 17, 2016
    Publication date: July 14, 2016
    Inventors: Kadangode Ramakrishnan, YIFAN HU, ROBERT BELL, JEFFREY PANG, JEFFREY ERMAN
  • Patent number: 9326026
    Abstract: A method that incorporates teachings of the subject disclosure may include, for example performing, by a wireless communication device comprising a processor, wireless telephony communications via a first wireless interface, transmitting information associated with media-related activities to a server, receiving from the server a media recommendation that is generated according to the information associated with media-related activities, initiating communications with a network via a second wireless interface, downloading a media content item of the media recommendation from a content provider via the second wireless interface, and presenting the media content item at a display. Other embodiments are disclosed.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: April 26, 2016
    Assignee: AT&T INTELLECTUAL PROPERTY I, LP
    Inventors: Kadangode Ramakrishnan, Yifan Hu, Robert Bell, Jeffrey Pang, Jeffrey Erman