Patents by Inventor H. Keith Williamson

H. Keith 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 for failover management in a synchronous optical network using standard protocols
    Patent number: 6738345
    Abstract: In synchronous optical communications network, a communications node (FIG. 1, 10) is in communications with a second communications node (12) and desires to fail all traffic over from a working link (120) to a protection link (130) without requiring coordination with the second communications node (12). In order to bring about the fail over, the first communications node (12) fabricates an alarm which expresses that a failure has occurred at a location external to the first communications node (10). When the second communications node (12) receives the alarm, it changes the state of an indicator which is not intended to influence the behavior of the first communications node (10). Upon reception of the indication that the second communications node (12) is receiving traffic over the protection link only, the first communications node (10) begins transmitting all traffic over the protection link (130).
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: May 18, 2004
    Assignee: Motorola, Inc.
    Inventor: H. Keith Williamson