Patents by Inventor Derek Hisami Mitsumori

Derek Hisami Mitsumori 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).

  • Voice over internet protocol (VoIP) network performance monitor
    Patent number: 6850525
    Abstract: Packet delivery statistics are derived from a User Datagram Protocol (UDP) stream simulating a service level provided by a Voice over Internet Protocol (VoIP) network and transmitted across the VoIP network at a first pre-defined interval. The derived packet delivery statistics are processed at a second pre-defined interval to generate network performance statistics for the VoIP network, where the second pre-defined interval is substantially larger than the first pre-defined interval.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: February 1, 2005
    Assignee: Level 3 Communications, Inc.
    Inventors: Derek Hisami Mitsumori, Sujin Catherine Chang, Kwang-Shan Pan
  • Voice over internet protocol (VoIP) network performance monitor
    Publication number: 20030128692
    Abstract: A method includes deriving packet delivery statistics from a User Datagram Protocol (UDP) stream simulating a service level provided by a Voice over Internet Protocol (VoIP) network and transmitted across the VoIP network at a first pre-defined interval, and processing the derived packet delivery statistics at a second pre-defined interval to generate network performance statistics for the VoIP network, where the second pre-defined interval is substantially larger than the first pre-defined interval.
    Type: Application
    Filed: January 4, 2002
    Publication date: July 10, 2003
    Inventors: Derek Hisami Mitsumori, Sujin Catherine Chang, Kwang-Shan Pan