Patents by Inventor Edward H. Matsukane

Edward H. Matsukane 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).

  • Apparatus and method for alerting computer users in a wireless LAN of a service area transition
    Patent number: 5467341
    Abstract: An apparatus and method is provided for detecting when a mobile computer linked to a computer server over a wireless link is about to move out of the range of the LAN and for alerting the computer user before the communication link with the computer server becomes severely deteriorated. According to the apparatus and method, a predetermined number of data packets are periodically transmitted from the mobile computer to the computer server, and the number of data packets successfully transmitted is determined based on acknowledgments received from the computer server, preferably using a cyclical redundancy check (CRC) code in the transmitted packets. Based on the number of data packets successfully transmitted, a transmission error rate is computed. The error rate is compared to a threshold value and, if the threshold is exceeded, an indication is provided to the user that the communication quality is deteriorating.
    Type: Grant
    Filed: April 14, 1994
    Date of Patent: November 14, 1995
    Assignee: Toshiba America Information Systems, Inc.
    Inventors: Edward H. Matsukane, Ryan H. Tze