Navigation device, navigation method, and navigation program

Abstract

A navigation device (100) for route guidance, comprising: a GPS unit (114) that obtains current position information through communication with the GPS; The route data or map data acquisition part (160) of the route data about the selected route; Judging whether the current position information can be obtained, when the current position information can be obtained, the guidance control part (120) for route guidance based on the obtained current position information ); when it is judged that the current position information cannot be obtained, the GPS communication control unit (150) that cuts off the communication with the GPS; when it is judged that the current position information cannot be obtained, the server communication control unit that cuts off the communication with the navigation server (300) (170). Therefore, when the current position information cannot be obtained, the power consumption can be reduced, and the burden of communication charges can be reduced.

Description

technical field [0001] The present invention relates to a navigation device for guiding a user according to a route, a navigation method, and a program for implementing navigation. Background technique [0002] Conventionally, a navigation device such as a car navigation device that provides route guidance to a vehicle has a function of searching for a route from a departure point to a destination. In such a navigation device, when the current position measured through communication with the GPS (Global Positioning System) deviates by a predetermined distance or more from the route searched and specified at the departure point, generally the route from the deviated point to the destination is automatically performed. Re-explore the route (change the route) and continue the route guidance. It is dangerous for the user to operate the navigation device while driving the vehicle, so the car navigation for the vehicle is controlled to automatically perform re-searching (changing...

AI Technical Summary

Problems solved by technology

[0003] In addition, in the navigation device that performs automatic re-searching of such a route, there is also a technique of restricting the search for a route.

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