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Traffic Information Distribution Method, Traffic Information Distribution Apparatus and In-Vehicle Terminal

  • US 20080183375A1
  • Filed: 01/25/2008
  • Published: 07/31/2008
  • Est. Priority Date: 01/26/2007
  • Status: Active Grant
First Claim
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1. A traffic information distribution method implemented in a computer which acquires or generates traffic information on a road traffic situation and distributes the traffic information individually to each of in-vehicle terminals equipped with vehicles, the method allowing the computer to perform the steps comprising:

  • a traffic information accumulation step of, at the time when the computer acquires or generates the traffic information, including predetermined identification information in the traffic information and accumulating in a storage device the traffic information which includes the predetermined identification information;

    a distribution request information reception step of receiving distribution request information transmitted from the in-vehicle terminal and containing identification information which is included in reference traffic information the in-vehicle terminal holds at the time when the in-vehicle terminal transmits the distribution request information;

    a difference traffic information generation step of generating difference traffic information between the traffic information stored in the storage device and having a same identification information as the identification information included in the reference traffic information contained in the received distribution request information and the traffic information which is to be distributed at the time when the difference traffic information is generated; and

    a traffic information distribution step of distributing the generated difference traffic information to the in-vehicle terminal.

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