Patents by Inventor Seiko Shimizu

Seiko Shimizu 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 and method of reconnection process
    Patent number: 8488585
    Abstract: There is provided a mobile station that minimizes a pause or a silent period during communication at the time of a reconnection process of communication, thereby to improve the user's convenience and achieve the reduction in the load applied onto the communication network or the mobile station. When an out of synchronization detection unit 4 of a mobile station 2 detects out of synchronization, an individual timer value determination unit 53 selects two or more timer value change triggers from timer value change triggers stored in a timer value change trigger memory 51, and then determines the timer values respectively for the timer value change triggers that have been selected, based upon the determination rules stored in an individual timer value determination rule memory 52. A reconnection timer value calculation unit 54 calculates an appropriate reconnection timer value based upon the two or more individual timer values that have been determined by the individual timer value determination unit 53.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: July 16, 2013
    Assignee: NTT DoCoMo, Inc.
    Inventors: Seiko Shimizu, Masayuki Furusawa, Taro Ishikawa, Toshiyuki Futakata
  • MOBILE STATION AND METHOD OF RECONNECTION PROCESS
    Publication number: 20110065437
    Abstract: There is provided a mobile station that minimizes a pause or a silent period during communication at the time of a reconnection process of communication, thereby to improve the user's convenience and achieve the reduction in the load applied onto the communication network or the mobile station. When an out of synchronization detection unit 4 of a mobile station 2 detects out of synchronization, an individual timer value determination unit 53 selects two or more timer value change triggers from timer value change triggers stored in a timer value change trigger memory 51, and then determines the timer values respectively for the timer value change triggers that have been selected, based upon the determination rules stored in an individual timer value determination rule memory 52. A reconnection timer value calculation unit 54 calculates an appropriate reconnection timer value based upon the two or more individual timer values that have been determined by the individual timer value determination unit 53.
    Type: Application
    Filed: May 7, 2009
    Publication date: March 17, 2011
    Applicant: NTT Docomo, Inc.
    Inventors: Seiko Shimizu, Masayuki Furusawa, Taro Ishikawa, Toshiyuki Futakata