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Route calculation device, navigation device, route calculation method, navigation method, and communication system

  • US 10,234,301 B2
  • Filed: 01/05/2015
  • Issued: 03/19/2019
  • Est. Priority Date: 03/24/2014
  • Status: Active Grant
First Claim
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1. A route calculation device comprising at least one processor configured to:

  • acquire communication available hours of a plurality of branch stations which are devices that collect information and transmit the information to a mobile station with which communication is established;

    acquire a reference time comprising one of a current time of the mobile station and a departure time at which the mobile station starts traveling;

    acquire time information of a road section comprising information on a travel time from a current location of the mobile station to each of the plurality of branch stations and information on a travel time between the branch stations;

    calculate a first travel route that offers a shortest required time for stopping by the branch stations based on the communication available hours, the reference time, and the time information of a road section;

    acquire speed information of the road section;

    acquire a travel speed;

    acquire a target speed based on the first travel route and the speed information of the road section;

    acquire information on a location of traffic congestion;

    determine whether a difference between the target speed and the travel speed is outside a predetermined speed range;

    determine whether there is traffic congestion on the first travel route based on the first travel route and the information on the location of traffic congestion;

    when it is determined that the difference between the target speed and the travel speed is outside the predetermined speed range and that there is traffic congestion on the first travel route, calculate a second travel route that offers a shortest required time for stopping by the branch stations based on the communication available hours, the reference time, and the time information of the road section.

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