Vehicle position uncertainty area correction method and apparatus therefor
First Claim
1. A vehicle position uncertainty area correction method comprising the steps of:
- providing a map database comprising more than one substantially parallel connected road segment;
receiving position measurements from a positioning system of the vehicle;
providing an initial position envelope that varies in size dependent on the received position measurements;
exacting the more than one substantially parallel connected road segment from the map database dependent on the initial position envelope;
determining an outermost pair of road segments from the extracted more than one substantially parallel connected road segment; and
providing a corrected position envelope, derived from said initial position envelope, said corrected position envelope bounded within a fixed area surrounding the outermost pair of road segments.
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0 Petitions
Accused Products
Abstract
In a preferred embodiment, a vehicle position uncertainty area correction method and a corresponding apparatus are detailed. This method is preferably executed on a hardware platform 400. This method includes provision of an initial position envelope (307) associated with a vehicle position. Then, a corrected position envelope (307"") is derived from the initial position envelope (307) and bounded within a predetermined fixed area (313, 315) surrounding an outermost pair (305, 309) of road segments. The outermost pair (305, 309) of road segments are extracted from a map database (415) positioned within boundaries delimited by the position envelope (307).
21 Citations
23 Claims
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1. A vehicle position uncertainty area correction method comprising the steps of:
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providing a map database comprising more than one substantially parallel connected road segment; receiving position measurements from a positioning system of the vehicle; providing an initial position envelope that varies in size dependent on the received position measurements; exacting the more than one substantially parallel connected road segment from the map database dependent on the initial position envelope; determining an outermost pair of road segments from the extracted more than one substantially parallel connected road segment; and providing a corrected position envelope, derived from said initial position envelope, said corrected position envelope bounded within a fixed area surrounding the outermost pair of road segments. - View Dependent Claims (2, 3, 4, 5, 12)
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6. A vehicle position uncertainty area correction method comprising the steps of:
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providing a map database comprising more than one substantially parallel connected road segment; receiving position and orientation measurements from a positioning system of the vehicle; providing a position envelope defining a position and an orientation of a vehicle dependent on the received-position and orientation measurements; providing an outermost pair of substantially parallel connected road segments extracted from the map database, wherein the pair of substantially parallel connected road segments is positioned within boundaries delimited by said position envelope; and providing a corrected position envelope by aligning outer boundaries of said position envelope in accordance with said outermost pair of connected road segments, and bounding said position envelope within a fixed area positioned surrounding said outermost pair of connected road segments. - View Dependent Claims (7, 8, 9)
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10. A vehicle position uncertainty area correction method comprising the steps of:
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providing a map database comprising more than one substantially parallel connected road segment; receiving a position and an orientation measurement from a positioning system of the vehicle; providing a position envelope in accordance with a position and an orientation of a vehicle dependent on the received position measurement; providing a set of road segments, extracted from the map database wherein the set of road segments is positioned within boundaries delimited by said position envelope; providing a subset of connected road segments extracted from said set of road segments in accordance with the received orientation measurement; determining a center heading vector of an outermost pair of connected road segments within said subset of connected road segments; and providing a corrected position envelope by bounding said position envelope within a predetermined fixed area surrounding said outermost pair of connected road segments centered on said center heading vector of said outermost pair of road segments. - View Dependent Claims (11, 13)
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14. A vehicle position uncertainty area correction apparatus comprising:
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a map database comprising more than one substantially parallel connected mad segment; means for receiving position measurements from a positioning system of the vehicle; means for providing an initial position envelope that varies in size dependent on the received position measurements; means for extracting the more than one substantially parallel connected road segment from the map database dependent on the initial position envelope; means for determining an outermost pair of road segments from the extracted more than one substantially parallel connected road segment; and means for providing a corrected position envelope, derived from said initial position envelope, said corrected position envelope bounded within a fixed area surrounding the outermost pair of road segments. - View Dependent Claims (15, 16, 17, 18)
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19. A vehicle position uncertainty area correction apparatus comprising:
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a map database comprising more than one substantially parallel connected mad segment; means for receiving position measurements from a positioning system of the vehicle; means for providing an initial position envelope that varies in size dependent on the received position measurements; means for extracting the more than one substantially parallel connected road segment from the map database dependent on the initial position envelope; means for determining an outermost pair of road segments from the extracted more than one substantially parallel connected road segment; and means for providing a corrected position envelope by aligning outer boundaries of said corrected position envelope in accordance with said more than one substantially parallel connected road segment, and bounding said corrected position envelope within a fixed area positioned surrounding said more than one substantially parallel connected road segment. - View Dependent Claims (20, 21, 22, 23)
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Specification