Patents by Inventor Jyunichirou Hagiwara

Jyunichirou Hagiwara 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).

  • Mobile station, mobile communication system, and cell selection method
    Patent number: 7634272
    Abstract: In mobile communication system 100 according to the present invention, mobile station 1 is camped on cell C10 established by base station B10. In the cell C10, there exist indoor cells C11-C13 and outdoor cells C21, C22 as neighboring cells. Mobile station 1 measures received levels of cells C10-C13, C21, C22 and determines cell types of the respective cells, i.e., whether each cell is an indoor cell or not, based on broadcast information M1. Mobile station 1 selects a cell as a reselection target on the basis of the received levels and cell types.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: December 15, 2009
    Assignee: NTT DoCoMo, Inc.
    Inventors: Takeshi Yamashita, Hideo Matsuki, Jyunichirou Hagiwara, Hidetoshi Kayama, Narumi Umeda
  • Base station, mobile station, communication system, transmission control method, and mobile station control program
    Patent number: 7218950
    Abstract: An object of the present invention is to reduce the volume of a control signal and shorten a delay of processing in a system comprising a base station configured to transmit a pilot signal at a predetermined transmission power and a mobile station configured to transmit a preamble prior to transmission/reception of data.
    Type: Grant
    Filed: April 8, 2004
    Date of Patent: May 15, 2007
    Assignee: NTT DoCoMo, Inc.
    Inventors: Heng Qiu, Hidetoshi Kayama, Jyunichirou Hagiwara, Narumi Umeda
  • Mobile station, mobile communication system, and cell selection method
    Publication number: 20050037798
    Abstract: In mobile communication system 100 according to the present invention, mobile station 1 is camped on cell C10 established by base station B10. In the cell C10, there exist indoor cells C11-C13 and outdoor cells C21, C22 as neighboring cells. Mobile station 1 measures received levels of cells C10-C13, C21, C22 and determines cell types of the respective cells, i.e., whether each cell is an indoor cell or not, based on broadcast information M1. Mobile station 1 selects a cell as a reselection target on the basis of the received levels and cell types.
    Type: Application
    Filed: October 17, 2003
    Publication date: February 17, 2005
    Applicant: NTT DoCoMo, Inc.
    Inventors: Takeshi Yamashita, Hideo Matsuki, Jyunichirou Hagiwara, Hidetoshi Kayama, Narumi Umeda
  • Base station, mobile station, communication system, transmission control method, and mobile station control program
    Publication number: 20040204101
    Abstract: An object of the present invention is to reduce the volume of a control signal and shorten a delay of processing in a system comprising a base station configured to transmit a pilot signal at a predetermined transmission power and a mobile station configured to transmit a preamble prior to transmission/reception of data.
    Type: Application
    Filed: April 8, 2004
    Publication date: October 14, 2004
    Applicant: NTT DoCoMo, Inc.
    Inventors: Heng Qiu, Hidetoshi Kayama, Jyunichirou Hagiwara, Narumi Umeda