Patents by Inventor Nagayasu Harada

Nagayasu Harada 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: 5898683
    Abstract: A base station is configured including an internal bus to connect a terminal section, transceivers that perform control and management of information to be transmitted or received and carries out radio communication at a predetermined radio frequency and on a predetermined communication method, and a controller connecting section that executes communication with a base station controller. The transceivers each comprise a transmitter/receiver section that transmits and receives radio waves at a predetermined radio frequency and using a predetermined communication method, and a logical control unit that performs control of the transmitter/receiver section and interference detection.
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: April 27, 1999
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Wireless Communications, Inc.
    Inventors: Shinji Matsumoto, Nagayasu Harada, Hiroshi Matsuyama, Robin U. Roberts, Michael H. Speanburg
  • Patent number: 4926421
    Abstract: In a mobile radio telephone system having multiple base stations controlled by a single line control unit, all base stations use a single common control channel in addition to their voice channels to communicate with a mobile station. If a calling signal from a mobile station is received by two or more base stations at once on the common control channel, the base station with the highest received signal level is selected. If voice signal quality becomes degraded during a call, the call is handed off to the base station with the highest received signal level.
    Type: Grant
    Filed: October 18, 1988
    Date of Patent: May 15, 1990
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Minori Kawano, Kazuo Mitsui, Masaharu Hirooka, Yasushi Ozu, Nagayasu Harada, Nobuhiro Kimura