Patents by Inventor Karuppusamy Marappagounder

Karuppusamy Marappagounder 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).

  • Enhanced phase synchronization of a timing slave apparatus in a packet switching network
    Patent number: 10111189
    Abstract: In one embodiment, a timing slave packet switching device receives a received primary reference clock signal. The timing slave packet switching device communicates a first plurality of packet network synchronization packets over a packet switching network with a remote primary reference clock source and derives an over-network clock based on the first plurality of packet network synchronization packets. A phase offset between the phase of the over-network clock and the phase of the received primary reference clock signal is determined and typically stored in non-volatile storage. Subsequent to said determining the phase offset, the timing slave packet switching device communicates a second plurality of packet network synchronization packets over the packet switching network with the remote primary reference clock source and adjusts the phase of a clock derived from the second plurality of packet network synchronization packets based on the phase offset.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: October 23, 2018
    Assignee: Cisco Technology, Inc.
    Inventors: Ishwardutt Parulkar, Karuppusamy Marappagounder, Manoj I. Somakumaran
  • Enhanced Phase Synchronization of a Timing Slave Apparatus in a Packet Switching Network
    Publication number: 20170034797
    Abstract: In one embodiment, a timing slave packet switching device receives a received primary reference clock signal. The timing slave packet switching device communicates a first plurality of packet network synchronization packets over a packet switching network with a remote primary reference clock source and derives an over-network clock based on the first plurality of packet network synchronization packets. A phase offset between the phase of the over-network clock and the phase of the received primary reference clock signal is determined and typically stored in non-volatile storage. Subsequent to said determining the phase offset, the timing slave packet switching device communicates a second plurality of packet network synchronization packets over the packet switching network with the remote primary reference clock source and adjusts the phase of a clock derived from the second plurality of packet network synchronization packets based on the phase offset.
    Type: Application
    Filed: September 21, 2015
    Publication date: February 2, 2017
    Applicant: Cisco Technology, Inc., a corporation of California
    Inventors: Ishwardutt Parulkar, Karuppusamy Marappagounder, Manoj I. Somakumaran