Patents by Inventor Harold K. Williamson

Harold K. Williamson 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 of flow control
    Patent number: 7274660
    Abstract: Flow control in a distributed switch fabric (100, 200) includes detecting at least one of a congestion condition (238) in a downstream transceiver port (205) and an oversubscribing condition (257) of a channel buffer (230), where the downstream transceiver port (205) and the channel buffer (230) both correspond to a channel (231) of a traffic manager (208). Packets begin accumulating in the channel buffer (230). Per-flow flow control (254) operates to modify transmission of the packets over the channel (231) to the channel buffer (230) if the channel buffer (230) reaches a threshold value (256). Link level flow control (252) operates transparently to the traffic manager (208) if the congestion condition (238) is detected and the channel buffer (230) fails to reach the threshold value (256).
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: September 25, 2007
    Assignee: Motorola, Inc.
    Inventors: Charles Hill, Rajesh Mangal, Ralph Snowden, Harold K. Williamson, James Holbrook
  • Communications system embedding communications session into ATM virtual circuit at line interface card and routing the virtual circuit to a processor card via a backplane
    Patent number: 7180900
    Abstract: An improved system and technique for processing a communications session in a data communications system suitably includes the steps of receiving the communications session at a line interface card, embedding the communications session into an asynchronous transfer mode (ATM) virtual circuit at the line interface card, transporting the virtual circuit from the line interface card to a processor card via a backplane. The processor card suitably extracts the communications session from the virtual circuit, and processes the communications session as appropriate.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: February 20, 2007
    Assignee: Motorola, Inc.
    Inventors: Harold K. Williamson, Charles Christopher Hill, Brian A. Carr
  • Method and apparatus for backplane distribution using asynchronous transfer mode
    Publication number: 20040162919
    Abstract: An improved system and technique for processing a communications session in a data communications system suitably includes the steps of receiving the communications session at a line interface card, embedding the communications session into an asynchronous transfer mode (ATM) virtual circuit at the line interface card, transporting the virtual circuit from the line interface card to a processor card via a backplane. The processor card suitably extracts the communications session from the virtual circuit, and processes the communications session as appropriate.
    Type: Application
    Filed: February 14, 2003
    Publication date: August 19, 2004
    Inventors: Harold K. Williamson, Charles Christopher Hill, Brian A. Carr
  • Method of flow control
    Publication number: 20040032827
    Abstract: Flow control in a distributed switch fabric (100, 200) includes detecting at least one of a congestion condition (238) in a downstream transceiver port (205) and an oversubscribing condition (257) of a channel buffer (230), where the downstream transceiver port (205) and the channel buffer (230) both correspond to a channel (231) of a traffic manager (208). Packets begin accumulating in the channel buffer (230). Per-flow flow control (254) operates to modify transmission of the packets over the channel (231) to the channel buffer (230) if the channel buffer (230) reaches a threshold value (256). Link level flow control (252) operates transparently to the traffic manager (208) if the congestion condition (238) is detected and the channel buffer (230) fails to reach the threshold value (256).
    Type: Application
    Filed: August 15, 2002
    Publication date: February 19, 2004
    Inventors: Charles Hill, Rajesh Mangal, Ralph Snowden, Harold K. Williamson, James Holbrook