Patents by Inventor Takeshi Sakemoto

Takeshi Sakemoto 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).

  • Communication system, communication method, and child station of communication system
    Patent number: 9271233
    Abstract: A child station (3) of a communication system performs communication while synchronizing the reference time of a parent station (2) with the local time (RT) of the child station (3). When the child station (3) is switched from a normal mode to a power saving mode in accordance with a mode change instruction from the parent station (2), correction is performed for one or both of a stop period in which the apparatus of the child station (3) is stopped and a non-stop period in the power saving mode using an error (?t) generated during the time between the reference time of the parent station (2) and the local time (RT) of the child station (3). This makes it possible to synchronize the parent station (2) with the child station (3) and reliably and efficiently transfer a control frame (CF) from the parent station (2) to the child station (3).
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: February 23, 2016
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Naoki Miura, Nobuyuki Tanaka, Takeshi Sakemoto, Masami Urano, Mamoru Nakanishi
  • COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND CHILD STATION OF COMMUNICATION SYSTEM
    Publication number: 20140185504
    Abstract: A child station (3) of a communication system performs communication while synchronizing the reference time of a parent station (2) with the local time (RT) of the child station (3). When the child station (3) is switched from a normal mode to a power saving mode in accordance with a mode change instruction from the parent station (2), correction is performed for one or both of a stop period in which the apparatus of the child station (3) is stopped and a non-stop period in the power saving mode using an error (?t) generated during the time between the reference time of the parent station (2) and the local time (RT) of the child station (3). This makes it possible to synchronize the parent station (2) with the child station (3) and reliably and efficiently transfer a control frame (CF) from the parent station (2) to the child station (3).
    Type: Application
    Filed: June 22, 2012
    Publication date: July 3, 2014
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Naoki Miura, Nobuyuki Tanaka, Takeshi Sakemoto, Masami Urano, Mamoru Nakanishi