Patents by Inventor Satyanarayana Billekal Rao

Satyanarayana Billekal Rao 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).

  • System and method for discovering path MTU of internet paths
    Patent number: 5959974
    Abstract: A local system issues an ICMP echo request packet with a size based on an initial PMTU value corresponding to that of the local system's interface MTU. When an ICMP needfrag error packet is received by the local system, this signifies that the initial PMTU value was too large for packets of corresponding size to be transmitted through the Internet without fragmentation. The value is accordingly decreased by the local system and a next ICMP echo request packet transmitted through the Internet. The process iterates until an ICMP echo request packet is successfully transmitted through the Internet to a target system. In response thereto, the target system transmits an ICMP echo response packet back through the Internet to the local system, thereby indicating that the last-sent ICMP echo request packet from the local system had the correct PMTU value which is thereafter assumed to be the correct PMTU.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: September 28, 1999
    Assignee: International Business Machines Corporation
    Inventors: Daniel Edward Badt, David Richard Marquardt, Satyanarayana Billekal Rao, Lance Warren Russell, Larry Steven Wise
  • System and method for dynamically refining PMTU estimates in a multimedia datastream internet system
    Patent number: 5892753
    Abstract: A local system issues an ICMP echo request packet with a size based on an initial PMTU value corresponding to that of the local system's interface MTU. When an ICMP needfrag error packet is received by the local system, this signifies that the initial PMTU value was too large for packets of corresponding size to be transmitted through the Internet without fragmentation. The value is accordingly decreased by the local system and a next ICMP echo request packet transmitted through the Internet. The process iterates until an ICMP echo request packet is successfully transmitted through the Internet to a target system. In response thereto, the target system transmits an ICMP echo response packet back through the Internet to the local system, thereby indicating that the last-sent ICMP echo request packet from the local system had the correct PMTU value which is thereafter assumed to be the correct PMTU.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: April 6, 1999
    Assignee: International Business Machines Corporation
    Inventors: Daniel Edward Badt, David Richard Marquardt, Satyanarayana Billekal Rao, Lance Warren Russell, Larry Steven Wise