Patents by Inventor Takayoshi Yokota

Takayoshi Yokota 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).

  • Publication number: 20080140308
    Abstract: A traffic information providing system externally acquires traffic information including information relating to the travel time of a link, calculates a travel time for a non-provision link to which no travel time is provided through estimate/complement operation. The estimate/complement operation is carried out with use of travel times, emergencies, travel times of links in the vicinity of the non-provision link, and so on, obtained in the near past. The system stores and statistically processes the externally-acquired traffic information, and also estimates a travel time in the near future. When there is an abnormality in the acquired traffic information, the system deletes the abnormality, regards the information as a non-provision link, calculates a probability distribution of travel times of links, calculates a probability distribution of travel times of the entire route made up of a plurality of links, and also calculates a probability for a specific travel time range.
    Type: Application
    Filed: February 7, 2008
    Publication date: June 12, 2008
    Applicant: Hitachi, Ltd.
    Inventors: Kenichiro YAMANE, Junsuke Fujiwara, Yoshinori Endo, Kimiyoshi Machii, Masatoshi Kumagai, Takayoshi Yokota, Shigeru Matsuo
  • Patent number: 7355528
    Abstract: A traffic information providing system externally acquires traffic information including information relating to the travel time of a link, calculates a travel time for a non-provision link to which no travel time is provided through estimate/complement operation. The estimate/complement operation is carried out with use of travel times, emergencies, travel times of links in the vicinity of the non-provision link, and so on, obtained in the near past. The system stores and statistically processes the externally-acquired traffic information, and also estimates a travel time in the near future. When there is an abnormality in the acquired traffic information, the system deletes the abnormality, regards the information as a non-provision link, calculates a probability distribution of travel times of links, calculates a probability distribution of travel times of the entire route made up of a plurality of links, and also calculates a probability for a specific travel time range.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: April 8, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Kenichiro Yamane, Junsuke Fujiwara, Yoshinori Endo, Kimiyoshi Machii, Masatoshi Kumagai, Takayoshi Yokota, Shigeru Matsuo
  • Publication number: 20070058625
    Abstract: The in-vehicle terminal includes an additional link database where link data including a temporary link ID (Identification) before being given by a server and established by an authorization device; a new and old link IDs database where a new and old link IDs table is saved wherein an established link ID of a link ID after being authorized by the authorization device and the temporary link ID are made to correspond to each other; a transmitting and receiving unit for transmitting traffic information data including the established link ID; and a processing unit for acquiring the established link ID included in the traffic information data, referring to the new and old link IDs table stored in the new and old link IDs database, acquiring the temporary link ID made to correspond to the established link ID, and based on the temporary link ID, acquiring link data from the additional link database.
    Type: Application
    Filed: September 12, 2006
    Publication date: March 15, 2007
    Applicant: Hitachi, Ltd.
    Inventors: Takumi Fushiki, Kazuya Kimita, Takayoshi Yokota, Masatoshi Kumagai
  • Patent number: 7155322
    Abstract: A vehicle information specification determining function is built in the on-board terminal installed on a vehicle to determine the specification for vehicle information collection. An information center determines service charges according to the vehicle information specification determined by the vehicle information specification determining function.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: December 26, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Nakahara, Takeshi Inoue, Takayoshi Yokota, Takumi Tushiki, Kennichirou Yamane
  • Publication number: 20060223529
    Abstract: By utilizing a cell phone carried by a driver or a fellow passenger to exchange with a base station during talking (through polling during non-talking), position information of the cell phone is obtained. The position information is collected and gathered as probe data and by matching the data with road map data, traffic congestion information on roads is generated. Then, when a business car of a driver carrying a cell phone is not traveling in a range initially predicted, it is decided whether position data of the cell phone is suitable as probe information and accurate traffic congestion information is generated.
    Type: Application
    Filed: February 23, 2006
    Publication date: October 5, 2006
    Inventors: Takayoshi Yokota, Takashi Moita, Itaru Oda, Satoshi Sugawara
  • Publication number: 20060206256
    Abstract: A traffic information system includes: a past information database for storing past information, which is colleted for road links in a predetermined area, of a past mobile object on a road; a current information database for storing running information, which is colleted for the road links in the predetermined area, of a current mobile object; link correlation analyzing means in which correlations of traffic information among each road link in the predetermined area are calculated from the past information stored in the past information database, and output as link correlation information among the road links; combination calculating means for calculating weighting information for obtaining the current information as a sum of the link correlation information; and traffic information estimating means for calculating estimated traffic information for a link where the current information is not collected based on the link correlation information and the weighting information.
    Type: Application
    Filed: February 17, 2006
    Publication date: September 14, 2006
    Applicant: HITACHI, LTD.
    Inventors: Masatoshi Kumagai, Takumi Fushiki, Takayoshi Yokota, Kazuya Kimita
  • Publication number: 20060064234
    Abstract: In a congestion prediction using measurement data which is acquired by an on-road sensor or a probe car, and which includes none of explicit information about bottleneck points, with respect to time-sequence data on congestion ranges accumulated in the past, data on congestion front-end positions are summarized into plural clusters by the clustering. Representative value in each cluster is assumed as position of each bottleneck. A regression analysis, in which day factors are defined as independent variables, is performed with congestion length from each bottleneck point selected as the target. Here, the day factors refer to factors such as day of the week, national holiday/etc. It then becomes possible to precisely predict a future congestion length.
    Type: Application
    Filed: August 19, 2005
    Publication date: March 23, 2006
    Inventors: Masatoshi Kumagai, Takumi Fushiki, Takayoshi Yokota, Kazuya Kimita
  • Publication number: 20060058940
    Abstract: A traffic information prediction system has a traffic information database for recording time sequential data of traffic information and a traffic condition change factor database for recording the location, time period and type of an event which may change traffic conditions. The time period and location of the change are detected from data distributions of the traffic information, the change being unable to be explained even by day factor information such as days of the week, seasons and commercial calendar, and weather information. An event having a relatively shorter temporal and spatial distance from the detection results is searched from the traffic condition change factor database. The traffic information prediction system can detect an occurrence of an event changing the traffic conditions and its influence area.
    Type: Application
    Filed: August 19, 2005
    Publication date: March 16, 2006
    Inventors: Masatoshi Kumagai, Takumi Fushiki, Takayoshi Yokota
  • Publication number: 20060025925
    Abstract: There is provided a prediction calculation system capable of allowing a numerical traffic information to be predicted in such a manner that day factors and the like are reflected thereon. Even if a day whose combination of the day factors is the same as that of a prediction-target day, i.e., a day with the same instance, does not exist within a time-period during which past traffic information has been accumulated, the prediction calculation unit merges the past traffic information appropriately, thereby predicting traffic information corresponding to the objective combination of the day factors. Concretely, the prediction calculation unit combines some of characteristic quantities of the past traffic information on a day-unit basis, thereby approximately reconstructing and predicting the instance.
    Type: Application
    Filed: July 27, 2005
    Publication date: February 2, 2006
    Applicant: Hitachi, Ltd.
    Inventors: Takumi Fushiki, Masatoshi Kumagai, Takayoshi Yokota, Kazuya Kimita
  • Publication number: 20050093720
    Abstract: A traffic information providing system externally acquires traffic information including information relating to the travel time of a link, calculates a travel time for a non-provision link to which no travel time is provided through estimate/complement operation. The estimate/complement operation is carried out with use of travel times, emergencies, travel times of links in the vicinity of the non-provision link, and so on, obtained in the near past. The system stores and statistically processes the externally-acquired traffic information, and also estimates a travel time in the near future. When there is an abnormality in the acquired traffic information, the system deletes the abnormality, regards the information as a non-provision link, calculates a probability distribution of travel times of links, calculates a probability distribution of travel times of the entire route made up of a plurality of links, and also calculates a probability for a specific travel time range.
    Type: Application
    Filed: September 2, 2004
    Publication date: May 5, 2005
    Applicant: Hitachi, Ltd.
    Inventors: Kenichiro Yamane, Junsuke Fujiwara, Yoshinori Endo, Kimiyoshi Machii, Masatoshi Kumagai, Takayoshi Yokota, Shigeru Matsuo
  • Publication number: 20050043880
    Abstract: A navi-server which is provided with information from a traffic information providing center, and presents and provides information made on the information to a terminal is characterized by being equipped with a first storage means storing the information provided from the traffic information providing center; a traffic jam statistical making means which makes traffic jam statistical information including traffic jam information in a predetermined point and a predetermined zone as well as a reliability of the traffic jam information, based on information stored in the first storage means; and a second storage means storing information made by the traffic jam statistical making means, wherein the navi-server presents and provides the information stored in the second storage means to the terminal, based on a request of the terminal and at a predetermined timing.
    Type: Application
    Filed: January 9, 2004
    Publication date: February 24, 2005
    Applicants: HITACHI, LTD., XANAVI INFORMATICS CORPORATION
    Inventors: Kenichiro Yamane, Junsuke Fujiwara, Yoshinori Endo, Kimiyoshi Machii, Shigeru Matsuo, Hideo Hiroshige, Takumi Fushiki, Takayoshi Yokota
  • Publication number: 20040167710
    Abstract: A method of presuming traffic conditions for implementing a forecast and a presumption of traffic jam situation in an area where probe cars are not traveling currently, in which the probe cars send floating car data that is times and positions of traveled areas to center facilities, and the center accumulates the floating car data in a floating car data database by traffic conditions presumption means and also presumes forecast traffic jam information in the forward areas of the probe cars and presumed traffic jam information in the backward areas thereof by using the current floating car data and the floating car data database accumulated from the past to the present.
    Type: Application
    Filed: March 2, 2004
    Publication date: August 26, 2004
    Inventors: Takumi Fushiki, Kenichiro Yamane, Takeshi Inoue, Takayoshi Yokota
  • Publication number: 20040162019
    Abstract: To ensure that of all information transmitted through broadcast communications, only the information corresponding to the traveling route of a mobile body will be efficiently displayed at the information terminal of a car navigation system or the like, the information terminal is provided with:
    Type: Application
    Filed: January 16, 2004
    Publication date: August 19, 2004
    Applicant: HITACHI, LTD.
    Inventors: Masato Horita, Takumi Fushiki, Kimiya Yamaashi, Takayoshi Yokota, Yukihiro Kawamata, Kenichiro Yamane
  • Patent number: 6759970
    Abstract: To ensure that of all information transmitted through broadcast communications, only the information corresponding to the traveling route of a mobile body will be efficiently displayed at the information terminal of a car navigation system or the like, the information terminal is provided with: a means for receiving the spot or area information being transmitted, and receiving information that has been linked to the spot or area information being transmitted, a means for judging whether the spot or area information that has been received above is included in part of the spot or area information corresponding to the traveling route of the mobile body, and storage media for retaining the received spot or area information that the above-mentioned judgment means has judged to be included in the spot or area information corresponding to the traveling route of the mobile body.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: July 6, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Masato Horita, Takumi Fushiki, Kimiya Yamaashi, Takayoshi Yokota, Yukihiro Kawamata, Kenichiro Yamane
  • Publication number: 20040083037
    Abstract: It is possible to control a car group having a probe car at the head thereof or a whole traffic flow including the car group, with due regard to the efficiency, safety and environment. A probe car system includes a device for inputting a control strategy and/or a car group strategy, based on a road map database or traffic data; a device for evaluating propriety of the strategy and determining a proper strategy; and a device for transmitting the proper strategy to the probe car.
    Type: Application
    Filed: October 16, 2003
    Publication date: April 29, 2004
    Inventors: Kenichiro Yamane, Takayoshi Yokota, Takumi Fushiki
  • Patent number: 6721650
    Abstract: A method of presuming traffic conditions for implementing a forecast and a presumption of traffic jam situation in an area where probe cars are not traveling currently, in which the probe cars send floating car data that is times and positions of traveled areas to center facilities, and the center accumulates the floating car data in a floating car data database by traffic conditions presumption means and also presumes forecast traffic jam information in the forward areas of the probe cars and presumed traffic jam information in the backward areas thereof by using the current floating car data and the floating car data database accumulated from the past to the present.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: April 13, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Takumi Fushiki, Kenichiro Yamane, Takeshi Inoue, Takayoshi Yokota
  • Publication number: 20040064337
    Abstract: A vehicle information specification determining function is built in the on-board terminal installed on a vehicle to determine the specification for vehicle information collection. An information center determines service charges according to the vehicle information specification determined by the vehicle information specification determining function.
    Type: Application
    Filed: September 24, 2003
    Publication date: April 1, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Takashi Nakahara, Takeshi Inoue, Takayoshi Yokota, Takumi Fushiki, Kennichirou Yamane
  • Patent number: 6708085
    Abstract: It is possible to control a car group having a probe car at the head thereof or a whole traffic flow including the car group, with due regard to the efficiency, safety and environment. A probe car system includes a device for inputting a control strategy and/or a car group strategy, based on a road map database or traffic data; a device for evaluating propriety of the strategy and determining a proper strategy; and a device for transmitting the proper strategy to the probe car.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: March 16, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Kenichiro Yamane, Takayoshi Yokota, Takumi Fushiki
  • Patent number: 6657558
    Abstract: To ensure that of all information transmitted through broadcast communications, only the information corresponding to the traveling route of a mobile body will be efficiently displayed at the information terminal of a car navigation system or the like, the information terminal is provided with: a means for receiving the spot or area information being transmitted, and receiving information that has been linked to the spot or area information being transmitted, a means for judging whether the spot or area information that has been received above is included in part of the spot or area information corresponding to the traveling route of the mobile body, and storage media for retaining the received spot or area information that the above-mentioned judgment means has judged to be included in the spot or area information corresponding to the traveling route of the mobile body.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: December 2, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Masato Horita, Takumi Fushiki, Kimiya Yamaashi, Takayoshi Yokota, Yukihiro Kawamata, Kenichiro Yamane
  • Publication number: 20030125874
    Abstract: A method of presuming traffic conditions for implementing a forecast and a presumption of traffic jam situation in an area where probe cars are not traveling currently, in which the probe cars send floating car data that is times and positions of traveled areas to center facilities, and the center accumulates the floating car data in a floating car data database by traffic conditions presumption means and also presumes forecast traffic jam information in the forward areas of the probe cars and presumed traffic jam information in the backward areas thereof by using the current floating car data and the floating car data database accumulated from the past to the present.
    Type: Application
    Filed: February 26, 2003
    Publication date: July 3, 2003
    Inventors: Takumi Fushiki, Kenichiro Yamane, Takeshi Inoue, Takayoshi Yokota