Patents by Inventor Lewis Davidson

Lewis Davidson 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).

  • Patent number: 8873374
    Abstract: A method is disclosed that enables an improved technique for recovering from an error scenario encountered during a call setup involving a malfunctioning media gateway and corresponding media gateway controller. The media gateway first detects a malfunction that affects a digital signal processing resource, and then proactively selects a processing resource available elsewhere at the gateway. The media gateway selects the new processing resource based on criteria including: i) the capabilities that were identified to handle the packet stream at the affected (faulty) processor; ii) the capabilities of the IP terminal originating the packet stream that is being moved; and iii) the Internet Protocol address of the affected processing resource. Advantageously, an effort is made to avoid having to inform the media gateway controller of the move, thereby minimizing any discontinuity in each packet stream and minimizing the time and processing that are required to establish the call.
    Type: Grant
    Filed: September 15, 2012
    Date of Patent: October 28, 2014
    Assignee: Avaya Inc.
    Inventors: Charles Lewis Davidson, Mark Daniel Rajcok
  • Patent number: 8305876
    Abstract: A method is disclosed that enables an improved technique for recovering from an error scenario encountered during a call setup that involves a malfunctioning media gateway and the corresponding media gateway controller. The media gateway first detects a malfunction that affects a digital signal processing resource. The media gateway then proactively selects a processing resource available elsewhere at the gateway. The media gateway selects the new processing resource based on criteria that include: i) the capabilities that were identified to handle the packet stream at the affected (faulty) processor; ii) the capabilities of the IP terminal originating the packet stream that is being moved; and iii) the Internet Protocol address of the affected processing resource. Advantageously, an effort is made to avoid having to inform the media gateway controller of the move, thereby minimizing any discontinuity in each packet stream and minimizing the time and processing that are required to establish the call.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: November 6, 2012
    Assignee: Avaya Inc.
    Inventors: Charles Lewis Davidson, Mark Daniel Rajcok
  • Publication number: 20100027528
    Abstract: A method is disclosed that enables a media gateway controller to optimize the selection of a media gateway from which to acquire call-related resources, in a multi-gateway environment. In accordance with the illustrative embodiment, the controller sets a high utilization threshold and a low utilization threshold for each media gateway it controls, for the purpose of receiving a notification when a threshold is crossed. As resources are utilized, removed from service, or become available for use, the media gateway recalculates the resource utilization of one or more predetermined resources and notifies the controller if a threshold for a particular resource has been crossed. The controller, in turn, uses the current threshold states as part of the selection of media gateway to serve one or more subsequent calls. The disclosed method can increase the probability of selecting a media gateway with sufficient resources for a successful call completion on the first attempt.
    Type: Application
    Filed: November 6, 2007
    Publication date: February 4, 2010
    Applicant: AVAYA TECHNOLOGY LLC
    Inventors: Charles Lewis Davidson, Jeffrey Meis, Thorsten Fredrik Ohrstrom Sandgren, Mark Daniel Rajcok, Sujesha Sudevan Sudevalayam, Ajay Jagdish Talreja
  • Patent number: 7633932
    Abstract: A method is disclosed that enables accelerating the removal from service of a signal processor at a media gateway. In accordance with the illustrative embodiment of the present invention, the media gateway receives an indication to remove one of its digital signal processors from service. Instead of waiting for all of the calls that are using the signal processor to come to an end, the media gateway proactively moves the packet streams from the signal processor to one or more other signal processors resident at the gateway. Advantageously, an effort is made to avoid having to inform the corresponding media gateway controller of the move, thereby minimizing any discontinuity in each moved packet stream.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: December 15, 2009
    Assignee: Avaya Inc.
    Inventors: Charles Lewis Davidson, Mark Daniel Rajcok
  • Patent number: 4515077
    Abstract: A duplicating stencil has its heading strip in the form of two separate regions separated by a perforation line.The holes on one region have a different arrangement from those on the other regions, so that tearing along the perforation line allows one region to be separated from the rest of the stencil and to leave the holes of the remaining region as the effective mounting holes.A single image field and a single top edge guide line apply for all of the heading strip regions.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: May 7, 1985
    Assignee: Gestetner Manufacturing Limited
    Inventors: Lewis Davidson, Brian Lees, Eric K. Lytra
  • Patent number: 3952231
    Abstract: The package comprises a plurality of metal/polymer laminates whereby electronic components or functional units may be directly attached or plugged into laminated elements to form a unitary package. An element or thermal transposer is included in the package to minimize thermal expansion mismatch between the components and the laminates and conduct thermal energy away from the attached electronic components. The polymer laminates are selected to have a configuration and thermal coefficient of expansion (TCE) that will permit the insertion and locking of materials within the laminates to form the unitary package. A wide variety of components and functional units having different electrical, thermal characteristics may be included in the package. The package is amenable to mass production processes that may be controlled by a designer to obtain packages at a low cost, more flexibility and suitable for complex electronics system.
    Type: Grant
    Filed: September 6, 1974
    Date of Patent: April 20, 1976
    Assignee: International Business Machines Corporation
    Inventors: Lewis A. Davidson, Michael C. Duffy, Alvard J. Erickson, Gerard R. Gunther-Mohr, Richard A. Williams