Patents by Inventor Kevin Castellow

Kevin Castellow 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).

  • Systems, methods and computer program products for coordinated session termination in an IMS network
    Patent number: 8683034
    Abstract: A network connectivity status of user equipment (UE) is detected. Detection of the network connectivity status of the UE may include, for example, detecting termination of network connectivity of the UE responsive to a communication to the network by the UE, receiving a termination message from the UE at the bootstrapping server function (BSF), receiving notification of de-registration of the UE from a home subscriber server (HSS) and/or detecting a loss of communications between the UE and the network. A bootstrapping server function (BSF) communicates with at least one network application function (NAF) responsive to detection of the network connectivity status to terminate a plurality of sessions associated with the UE.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: March 25, 2014
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Amy Zwarico, Loraine Beyer, Kevin Castellow
  • Systems, Methods and Computer Program Products for Coordinated Session Termination in an IMS Network
    Publication number: 20090089425
    Abstract: A network connectivity status of user equipment (UE) is detected. Detection of the network connectivity status of the UE may include, for example, detecting termination of network connectivity of the UE responsive to a communication to the network by the UE, receiving a termination message from the UE at the bootstrapping server function (BSF), receiving notification of de-registration of the UE from a home subscriber server (HSS) and/or detecting a loss of communications between the UE and the network. A bootstrapping server function (BSF) communicates with at least one network application function (NAF) responsive to detection of the network connectivity status to terminate a plurality of sessions associated with the UE.
    Type: Application
    Filed: October 2, 2007
    Publication date: April 2, 2009
    Inventors: Amy Zwarico, Loraine Beyer, Kevin Castellow