Patents by Inventor Ezzat Kaafarani

Ezzat Kaafarani 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).

  • Resolving hanging contexts when roaming in a GPRS network
    Patent number: 7512104
    Abstract: The present invention discloses a method for preventing hanging resources in connection with an SRNS Relocation Procedure and/or a Routing Area Update Procedure for a terminal roaming in a UMTS or a GPRS network. According to a first aspect of the present invention, when the SGSN from which a terminal is roaming detects a fault after the Relocation Command in the SRNS Relocation Procedure, a Relocation Cancel Procedure also involving any involved GGSN is initiated. According to a second aspect of the present invention, a timer is started in the SGSN to which the terminal is roaming when the Forward Relocation Request in the Routing Area Update Procedure is received. If this SGSN does not receive a Routing Area Update Request within a predefined time period, the SGSN initiate a clean up of the resources that have been occupied during the procedures towards the involved nodes.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: March 31, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (PUBL)
    Inventors: Frode Bjelland, Ezzat Kaafarani
  • Resolving hanging contexts when roaming in a GPRS network
    Publication number: 20030153309
    Abstract: The present invention discloses a method for preventing hanging resources in connection with an SRNS Relocation Procedure and/or a Routing Area Update Procedure for a terminal roaming in a UMTS or a GPRS network. According to a first aspect of the present invention, when the SGSN from which a terminal is roaming detects a fault after the Relocation Command in the SRNS Relocation Procedure, a Relocation Cancel Procedure also involving any involved GGSN is initiated. According to a second aspect of the present invention, a timer is started in the SGSN to which the terminal is roaming when the Forward Relocation Request in the Routing Area Update Procedure is received. If this SGSN does not receive a Routing Area Update Request within a predefined time period, the SGSN initiate a clean up of the resources that have been occupied during the procedures towards the involved nodes.
    Type: Application
    Filed: February 11, 2003
    Publication date: August 14, 2003
    Inventors: Frode Bjelland, Ezzat Kaafarani