Reporting of changes in navigation map data for navigation system
First Claim
1. A method for updating navigation map data, comprising using mobile communications to receive navigation map update data from a plurality of navigation units each carried by a corresponding one of a plurality of vehicles, the navigation map update data being obtained by;
- detecting a position of each vehicle via operation of a respective navigation unit;
calculating a route for each vehicle to a destination via operation of the respective navigation unit using the navigation map data;
detecting when the calculated route to the destination is left by each vehicle via operation of the respective navigation unit, and then storing position data of the vehicle in a memory of the vehicle'"'"'s navigation unit until;
the vehicle is back on the calculated route,the vehicle is on a recalculated route to the destination from an actual position, orthe vehicle has reached the destination, andevaluating the position data stored by the respective navigation units of the plurality of vehicles to obtain the navigation map update data after a number of the plurality of vehicles that left the calculated route exceeds a threshold value;
wherein storing the position data and evaluating the position data includes filtering out position data corresponding to detours for fuel stations, restaurants visits, and other events associated with prolonged periods of the navigation unit being stationary.
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Abstract
A method, navigation unit and map update server for updating navigation map data are disclosed. Navigation map update data is received from a navigation unit using mobile communications. The navigation map update data is obtained by detecting the position of a vehicle, calculating a route for the vehicle to a destination using the navigation map data and detecting when the calculated route to the destination is left. If so, the method begins storing position data until the vehicle is back on the calculated route, on a recalculated route to the destination from an actual position, or when it has reached the destination. Furthermore, the method comprises evaluating the stored position data to obtain navigation map update data. Navigation map update data is kept local for a geographically limited area corresponding to an area serviced by a network node in the cellular communication network.
26 Citations
14 Claims
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1. A method for updating navigation map data, comprising using mobile communications to receive navigation map update data from a plurality of navigation units each carried by a corresponding one of a plurality of vehicles, the navigation map update data being obtained by;
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detecting a position of each vehicle via operation of a respective navigation unit; calculating a route for each vehicle to a destination via operation of the respective navigation unit using the navigation map data; detecting when the calculated route to the destination is left by each vehicle via operation of the respective navigation unit, and then storing position data of the vehicle in a memory of the vehicle'"'"'s navigation unit until; the vehicle is back on the calculated route, the vehicle is on a recalculated route to the destination from an actual position, or the vehicle has reached the destination, and evaluating the position data stored by the respective navigation units of the plurality of vehicles to obtain the navigation map update data after a number of the plurality of vehicles that left the calculated route exceeds a threshold value; wherein storing the position data and evaluating the position data includes filtering out position data corresponding to detours for fuel stations, restaurants visits, and other events associated with prolonged periods of the navigation unit being stationary. - View Dependent Claims (2)
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3. A navigation unit arranged to communicate with a cellular communication network, the navigation unit comprising:
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a processor connected to a navigation device, a mobile communication unit and toa memory unit, the navigation device being arranged to detect an actual location of the navigation unit, the memory unit being arranged to store navigation map data, and the processor being arranged to; calculate a route to a destination using the navigation map data; detect when the calculated route to the destination is left, and if so, store detected position data in the memory unit; filter out detected position data corresponding to detours for fuel stations, restaurant visits, and other events associated with prolonged periods of the navigation unit being stationary; and initialize a transmission of the detected and filtered position data to a navigation map server via the mobile communication unit upon detection that; a detected actual location is back on the calculated route, the detected actual location is on a recalculated route to the destination from the actual location, or the destination has been reached. - View Dependent Claims (4, 5)
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6. A method performed by a navigation unit of a vehicle for updating navigation map data, comprising:
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detecting an actual position; calculating a route for a vehicle to a destination using navigation map data; detecting when the calculated route to the destination is left, and if so, continuously storing detected actual position data until; the vehicle is back on the calculated route, the vehicle is on a recalculated route to the destination from the actual position, or the destination has been reached;
wherein storing detected actual position data comprises filtering out detected position data corresponding to detours for fuel stations, restaurant visits, and other events associated with prolonged periods of the navigation unit being stationary; and
thentransmitting the detected actual position data to a navigation map server. - View Dependent Claims (7)
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8. A navigation map server in communication with a network node associated with a group of cells of a cellular communication network, the navigation map server comprising:
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a memory unit for storing navigation map data, a map update service module being arranged to receive position data from a plurality of navigation units via the cellular communication network, the position data comprising deviations from a calculated route, wherein data corresponding to detours for fuel stations, restaurant visits, and other events associated with prolonged periods of the navigation unit being stationary are filtered out; and an evaluation module in communication with the map update service module, the evaluation module being arranged to evaluate the position data to obtain navigation map update data for a geographically limited area associated with the group of cells based on a threshold value of occurrences of the position data. - View Dependent Claims (9, 10, 11, 12)
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13. A method for updating navigation map data, comprising:
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receiving via a network node associated with a group of cells of a cellular communication network position data from a plurality of navigation units, storing the position data comprising deviations from a calculated route, filtering out detected position data corresponding to detours for fuel stations, restaurant visits, and other events associated with prolonged periods of the navigation unit being stationary; and evaluating the position data to obtain navigation map update data for a geographically limited area associated with the group of cells, wherein evaluating the position data to obtain navigation map update data is based on a threshold value of deviations from the calculated route. - View Dependent Claims (14)
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Specification