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Communication navigation system and server apparatus and terminal apparatus therefor, communication navigation method and communication navigation program

  • US 6,954,694 B2
  • Filed: 09/10/2002
  • Issued: 10/11/2005
  • Est. Priority Date: 09/10/2001
  • Status: Expired due to Fees
First Claim
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1. A communication navigation system that includes a terminal apparatus for receiving navigation information sent from a server apparatus while moving with a mobile body and the server apparatus for sending the navigation information to the terminal apparatus, and performs navigation of the mobile body while exchanging the navigation information between the server apparatus and the terminal apparatus,wherein the navigation information comprises a plurality of pieces of block data and each piece of the block data has identification information indicating discrimination from the other pieces of block data, and the communication navigation system comprises:

  • a detecting device for detecting whether or not exchange of the navigation information is suspended;

    an extracting device for extracting block data for which exchange of navigation data is uncompleted when it is detected that exchange of the navigation information is suspended; and

    a resuming device for resuming exchange of the navigation information from exchange of the extracted block data.

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