Route guidance apparatus

Details Route guidance apparatus Route guidance apparatus

1998-05-07

2000-12-19

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Position indicating

701208, 701209, G01S 302

Patent

active

061632988

ABSTRACT:
A system (UTMS) is disclosed for sending guiding destination data to a control center and calculating a recommended route at the control center while taking traffic conditions into account and presenting the route to a vehicle, in which a route guidance apparatus promptly obtains the recommended route. A controller installed on the vehicle uses data stored in a map data memory to independently search for a route to a destination, and a UTMS link positioned on the obtained route is transmitted to the control center as guiding destination data. Until the search completes, immediately after the destination has been set, a UTMS area to which that destination belongs is transmitted to the control center as temporary guiding destination data. Thereafter, a UTMS link that appears from the search is transmitted as guiding destination data. A recommended route is obtained from the control center even before the search completes, thereby improving the utilization efficiency of the UTMS.

REFERENCES:
patent: 5839086 (1998-11-01), Hirano

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