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Communication navigation system, communication navigation method, route guidance information transmitting device, and terminal unit

  • US 20030109983A1
  • Filed: 10/04/2002
  • Published: 06/12/2003
  • Est. Priority Date: 10/05/2001
  • Status: Active Grant
First Claim
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1. A communication navigation method for performing navigation, using map data stored in a server and current position data about a navigation terminal, by transmitting the map data to the navigation terminal via a communication network, the communication navigation method comprising:

  • a requesting process in which the navigation terminal requests the server to transmit an information necessary for an immediate part of guidance via the communication network; and

    a transmitting process in which the server transmits the requested information to the navigation terminal via the communication network, wherein the server transmits updated information to the navigation terminal when the server receives the request from the navigation terminal.

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