Navigation device, navigation method, and computer product
First Claim
1. A navigation device that performs a route guidance based on a route from a current location to a destination, the navigation device being connected to a server for searching the route, the navigation device comprising:
- a communication controller configured to send a request for searching the route to the server;
a guidance-information receiving unit configured to receive information on the route from the server;
a time measuring unit configured to measure an elapsed time from a start of the route guidance; and
a guidance controller configured to perform the route guidance based on the information received, whereinthe communication controller commands the navigation device to cut off a communication with the server and to stand by upon a determination that the elapsed time measured has reached a predetermined time and when the route is being guided or a current location is being checked by the guidance controller, to decrease a bandwidth usage between the navigation device and the server and to reduce a communication charge associated with the bandwidth usage.
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Accused Products
Abstract
A navigation device performs a route guidance based on a route from a current location to a destination. A communication controller sends a request for searching the route to a server. A guidance-information receiving unit receives information on the route from the server. A time measuring unit measures an elapsed time from a start of the route guidance. A guidance controller performs the route guidance based on the information received. The communication controller commands the navigation device to cut off a communication with the server and to stand by upon a determination that the elapsed time measured has reached a predetermined time and when the route is being guided or a current location is being checked by the guidance controller, to decrease a bandwidth usage between the navigation device and the server and to reduce a communication charge associated with the bandwidth usage.
17 Citations
7 Claims
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1. A navigation device that performs a route guidance based on a route from a current location to a destination, the navigation device being connected to a server for searching the route, the navigation device comprising:
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a communication controller configured to send a request for searching the route to the server; a guidance-information receiving unit configured to receive information on the route from the server; a time measuring unit configured to measure an elapsed time from a start of the route guidance; and a guidance controller configured to perform the route guidance based on the information received, wherein the communication controller commands the navigation device to cut off a communication with the server and to stand by upon a determination that the elapsed time measured has reached a predetermined time and when the route is being guided or a current location is being checked by the guidance controller, to decrease a bandwidth usage between the navigation device and the server and to reduce a communication charge associated with the bandwidth usage. - View Dependent Claims (2, 3, 4, 5)
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6. A navigation device that performs a route guidance based on a route from a current location to a destination, the navigation device being connected to a server for searching the route, the navigation device comprising:
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a communication controller configured to send a request for searching the route to the server; a guidance-information receiving unit configured to receive information on the route from the server; a guidance controller configured to perform the route guidance based on the information received; and a data-amount calculating unit configured to calculate an amount of the information received, and to add the amount of information received to an amount of information that was previously sent and saved in a memory, wherein the communication controller commands the navigation device to cut off a communication with the server and to stand by upon a determination that the amount saved in the memory has reached a predetermined amount and when the route is being guided or the current location is being checked by the guidance controller, to decrease a bandwidth usage between the navigation device and the server and to reduce a communication charge associated with the bandwidth usage. - View Dependent Claims (7)
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Specification