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VEHICLE-MOUNTED DEVICE, TRAFFIC-INFORMATION ACQUISITION METHOD, TRAFFIC-INFORMATION PROVISION SYSTEM, AND TRAFFIC-INFORMATION PROVISION METHOD

  • US 20080004791A1
  • Filed: 06/19/2007
  • Published: 01/03/2008
  • Est. Priority Date: 06/30/2006
  • Status: Active Grant
First Claim
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1. A vehicle-mounted device that acquires traffic information for a vehicle, comprising:

  • a traffic-information acquisition unit configured to acquire the traffic information from an external device via wireless communication; and

    a controller configured to control the traffic-information acquisition unit to acquire current traffic information from the external device when a change occurs between a current traffic condition and a previous traffic condition based on previously-provided traffic information.

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