Patents by Inventor Phu Khanh Huynh

Phu Khanh Huynh 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).

  • Method and apparatus of detection of inter-carrier looping
    Patent number: 7469042
    Abstract: Method and apparatus for detecting inter-carrier call looping. In one embodiment, the present invention is a method that can be used to reliably detect inter-network routing loops and kill associated calls using a modified ISUP Hop Counter parameter to be sent across network boundaries. Detection of inter-network loops prevents routing loops, those involving two or more carrier networks, from generating additional signaling traffic that can aggregate to overload signaling networks.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: December 23, 2008
    Assignee: AT&T Corp.
    Inventor: Phu Khanh Huynh
  • Method and apparatus of detection of inter-carrier looping
    Patent number: 7366288
    Abstract: Method and apparatus for detecting inter-carrier call looping. In one embodiment, the present invention is a method that can be used to reliably detect inter-network routing loops and kill associated calls using a modified ISUP Hop Counter parameter to be sent across network boundaries. Detection of inter-network loops prevents routing loops, those involving two or more carrier networks, from generating additional signaling traffic that can aggregate to overload signaling networks.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: April 29, 2008
    Assignee: AT&T Corp.
    Inventor: Phu Khanh Huynh
  • Method and apparatus of detection of inter-carrier looping
    Patent number: 7010102
    Abstract: Method and apparatus for detecting inter-carrier call looping using a modified Hop Counter parameter.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: March 7, 2006
    Assignee: AT&T Corp.
    Inventor: Phu Khanh Huynh