Patents by Inventor Douglas E. Schafer

Douglas E. Schafer 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 for testing stateful network communications devices
    Patent number: 7496664
    Abstract: There is disclosed a method for testing a stateful network communications device. A plurality of stateful and simulated stateless connections are established with the device under test. Packets are sent to the device under test, and responses are received from the device enter test, over the stateless and stateful connections. Measurements are obtained for at least one of the stateless and stateful connections.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: February 24, 2009
    Assignee: IXIA
    Inventors: Clifford L. Hannel, Douglas E. Schafer, Errol Ginsberg, Gerald R. Pepper
  • Methods and systems for testing stateful network communications devices
    Patent number: 7194535
    Abstract: Methods and systems for testing stateful network communications devices are disclosed. According to one test method, stateful and simulated stateless sessions are established with a device under test. Packets are sent to the device under test over the stateful and stateless connections. Information received on the stateful connections is used to alter test conditions on the stateless connections. As a result, a realistic mix of network traffic can be achieved with a reduced amount of hardware.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: March 20, 2007
    Assignee: IXIA
    Inventors: Clifford L. Hannel, Douglas E. Schafer, Errol Ginsberg, Gerald R. Pepper
  • Methods and systems for testing stateful network communications devices
    Publication number: 20030088664
    Abstract: Methods and systems for testing stateful network communications devices are disclosed. According to one test method, stateful and simulated stateless sessions are established with a device under test. Packets are sent to the device under test over the stateful and stateless connections. Information received on the stateful connections is used to alter test conditions on the stateless connections. As a result, a realistic mix of network traffic can be achieved with a reduced amount of hardware.
    Type: Application
    Filed: October 1, 2001
    Publication date: May 8, 2003
    Inventors: Clifford L. Hannel, Douglas E. Schafer, Errol Ginsberg, Gerald R. Pepper