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Information receiving method, navigation apparatus and motorcar

  • US 6,085,146 A
  • Filed: 04/23/1998
  • Issued: 07/04/2000
  • Est. Priority Date: 04/24/1997
  • Status: Expired due to Term
First Claim
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1. An information receiving method for a mobile unit of receiving a transmitted district information transmitted at a predetermined frequency and then displaying the received district information from a received signal, comprising the steps of:

  • estimating a current location of the mobile unit and then determining whether a current location district information of a current location area to which the estimated current location pertains is included in said received signal; and

    performing, when it is determined that the current location district information of the current location area to which the current location pertains is not included in the received signal, a process for changing said predetermined frequency.

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