Patents by Inventor Naoki USHIJIMA

Naoki USHIJIMA 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).

  • Road network analysis system
    Patent number: 8731808
    Abstract: A road network analysis system detects major changes in a road network based on probe information from a plurality of vehicles. The probe information is tabulated and the change in the amount of traffic is calculated for each road with a predetermined time interval. If a remarkable change in the amount of traffic is detected for a road before and after a specific baseline day, it is determined that a major change in the road network affecting the traffic has occurred in the vicinity of the road, and the road is specified as a change-related road. A path search may be performed between the endpoints of a plurality of change-related roads, and the searched paths that have the most overlap with the searched paths are selected so as to identify the change-related roads which are commonly affected by the same cause and the endpoints thereof.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: May 20, 2014
    Assignees: Zenrin Co., Ltd., Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd.
    Inventors: Hiroyuki Tashiro, Yukiko Katsuki, Naoki Ushijima, Motohiro Nakamura, Kazunori Watanabe, Sadahiro Koshiba, Kazuteru Maekawa
  • ROAD NETWORK ANALYSIS SYSTEM
    Publication number: 20130345955
    Abstract: A road network analysis system detects major changes in a road network based on probe information from a plurality of vehicles. The probe information is tabulated and the change in the amount of traffic is calculated for each road with a predetermined time interval. If a remarkable change in the amount of traffic is detected for a road before and after a specific baseline day, it is determined that a major change in the road network affecting the traffic has occurred in the vicinity of the road, and the road is specified as a change-related road. A path search may be performed between the endpoints of a plurality of change-related roads, and the searched paths that have the most overlap with the searched paths are selected so as to identify the change-related roads which are commonly affected by the same cause and the endpoints thereof.
    Type: Application
    Filed: July 17, 2013
    Publication date: December 26, 2013
    Inventors: Hiroyuki TASHIRO, Yukiko KATSUKI, Naoki USHIJIMA, Motohiro NAKAMURA, Kazunori WATANABE, Sadahiro KOSHIBA, Kazuteru MAEKAWA