Patents by Inventor Tadamichi Tagawa

Tadamichi Tagawa 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).

  • Radio communications apparatus and a method for reestablishing a network with a join signal transmitted at variable timing
    Patent number: 8331336
    Abstract: A radio communications apparatus includes a network position detector for detecting information on the position of the communication device on a radio telecommunications network, a network connection detector for detecting the disengagement of the device from the network, and a controller for controlling the transmission timing of join signals. The controller is adapted to vary a transmission timeout period, upon expiring of which a join signal is sent out, depending on the information about the positions on the network. The radio communications device is thus able to decrease the probability of occurrence of collision to thereby reduce the time taken for reestablishing the network.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: December 11, 2012
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Yasutaka Kawamoto, Tadamichi Tagawa
  • Radio communications apparatus and a method for reestablishing a network with a join signal transmitted at variable timing
    Publication number: 20090233638
    Abstract: A radio communications apparatus includes a network position detector for detecting information on the position of the communication device on a radio telecommunications network, a network connection detector for detecting the disengagement of the device from the network, and a controller for controlling the transmission timing of join signals. The controller is adapted to vary a transmission timeout period, upon expiring of which a join signal is sent out, depending on the information about the positions on the network. The radio communications device is thus able to decrease the probability of occurrence of collision to thereby reduce the time taken for reestablishing the network.
    Type: Application
    Filed: March 10, 2009
    Publication date: September 17, 2009
    Applicant: OKI ELECTRIC INDUSTRY CO., LTD.
    Inventors: Yasutaka KAWAMOTO, Tadamichi TAGAWA