Road data maintenance system and on-vehicle terminal apparatus compatible therewith
First Claim
1. A road data maintenance system for maintaining possessed road data possessed by an information center by adding unpossessed road data which is not possessed by said information center to said possessed road data,said system comprising an on-vehicle terminal apparatus connectable to said information center via communication means, including:
- position detecting means for detecting a current position of a vehicle;
possession judging means for judging whether the road the vehicle travels on is a candidate unpossessed road based on the current position of the vehicle; and
notifying means for notifying said information center of candidate unpossessed road data obtained based on a locus of said current position of the vehicle,wherein said information center includesmaintenance means for evaluating the reliability of the candidate unpossessed road data collected from a plurality of vehicles and adding road data having a high reliability to said possessed road data.
1 Assignment
0 Petitions
Accused Products
Abstract
Unpossessed road data is added to possessed road data stored in a road contour database of an information center. An on-vehicle terminal apparatus first compares a current position of a vehicle detected by a D-GPS unit against the road data stored in a storage section for storing road contour data of possessed roads. If the current position deviates from a known existing road, it is determined that the vehicle travels on an unpossessed road. Road data of the unpossessed road is then obtained based on a travel locus of the vehicle and sent to the information center together with a reliability index of the road data. The information center collects unpossessed road data from a plurality of sources, evaluates the reliability index for each data, and adds sufficiently reliable road data to the possessed road data. Thus, the information center can quickly obtain and utilize new and reliable road data.
275 Citations
13 Claims
-
1. A road data maintenance system for maintaining possessed road data possessed by an information center by adding unpossessed road data which is not possessed by said information center to said possessed road data,
said system comprising an on-vehicle terminal apparatus connectable to said information center via communication means, including: -
position detecting means for detecting a current position of a vehicle; possession judging means for judging whether the road the vehicle travels on is a candidate unpossessed road based on the current position of the vehicle; and notifying means for notifying said information center of candidate unpossessed road data obtained based on a locus of said current position of the vehicle, wherein said information center includes maintenance means for evaluating the reliability of the candidate unpossessed road data collected from a plurality of vehicles and adding road data having a high reliability to said possessed road data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An on-vehicle terminal apparatus mounted on a vehicle and connected via communication means to an information center to which said on-vehicle terminal apparatus provides information for maintaining possessed road data which is possessed by said information center, comprising:
-
position detecting means for detecting a current position of a vehicle, possession judging means for judging whether the vehicle travels on a candidate unpossessed road for which data is not stored in said information center, based on said current position of the vehicle; and notifying means for notifying said information center of candidate unpossessed road data obtained based on a locus of said current position of the vehicle, and a reliability index indicating the reliability of said road data. - View Dependent Claims (12, 13)
-
Specification