06347278 is referenced by 63 patents and cites 6 patents.

A navigation system in which a mobile terminal side

101

is not equipped with a CD-ROM for storing map database

105

, but implements an on-demand navigation function by sharing the one provided within a server

102

. By limiting the communications between the mobile terminal

101

and the server

102

only to the beginning of the route guidance and the moment at which the mobile terminal has deviated from the route, the communication traffic can be reduced, minimizing thereby the communication cost and the total power consumption as a whole, and further even when the mobile terminal

101

has deviated from the guide route, the system can readily provide the user with information by which he can reach his destination through communications with the server, and enabling also an indication of the name of the road to be taken at every crossings.

Title
Mobile terminal and a server for navigation system
Application Number
9/768255
Publication Number
6347278 (B2)
Application Date
January 25, 2001
Publication Date
February 12, 2002
Inventor
Takashi Ito
Tokyo
US
Assignee
Mitsubishi Denki Kabushiki Kaisha
US
IPC
G01C 21/00
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