Patent ID: 6947837
Filing Date: 2005-09-20
Classification: G01C,G08G

Abstract:
1. A communication navigation system comprising: a communication center apparatus; and a communication navigation terminal, both of which transmit and receive information by a two-way communication through a communication network, (i) said communication center apparatus comprising: a map database for storing therein map database information including information for a route search, which enables the route search from a current position of a movable body to a destination by a predetermined algorithm; a search device for searching, by the predetermined algorithm, for a route heading to the destination from the current position, on the basis of the map database information including the information for the route search, according to the destination and the current position received through the communication network; and a center side wireless device for wirelessly transmitting route information indicating the searched route through the communication network, (ii) said communication navigation terminal comprising: a measurement device for measuring the current position; a terminal side wireless device for transmitting the measured current position and receiving the transmitted route information through the communication network; a traveling locus recording device for recording a traveling locus of the movable body such that it preferentially holds the traveling locus recorded when the movable body is moving out of a service area of said communication navigation system; and a processing device for performing navigation processing of a predetermined type based on the preferentially held traveling locus in case that the movable body is moving out of the service area.