Method and system for tracking moving objects
First Claim
Patent Images
1. A method for creating an uncertainty-based trajectory for a moving object, the method comprising:
- obtaining a sequence of expected locations for the moving object including a starting point, a destination point and intermediate points;
computing a temporal-spatial path along which the moving object travels from the starting point through the intermediate points to the destination point;
constructing a trajectory that encompasses all possible temporal-spatial paths along which the moving object may travel from the starting point through the intermediate points to the destination point within a range of spatial and temporal uncertainties relative to the temporal-spatial path; and
displaying the trajectory superimposed on an electronic map.
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Abstract
A database receives location information about a moving object. Using the destination of the object and an electronic map, the database finds a projected path for the moving object. From the projected path, the database computes a trajectory. The trajectory may be used to estimate past and future positions of the moving object. The moving object may send location updates to the database when its actual location differs from its anticipated location by more than an uncertainty threshold.
77 Citations
24 Claims
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1. A method for creating an uncertainty-based trajectory for a moving object, the method comprising:
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obtaining a sequence of expected locations for the moving object including a starting point, a destination point and intermediate points; computing a temporal-spatial path along which the moving object travels from the starting point through the intermediate points to the destination point; constructing a trajectory that encompasses all possible temporal-spatial paths along which the moving object may travel from the starting point through the intermediate points to the destination point within a range of spatial and temporal uncertainties relative to the temporal-spatial path; and displaying the trajectory superimposed on an electronic map. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for constructing an uncertainty-based trajectory for a moving object, the method comprising:
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obtaining a sequence of expected locations for the moving object including a starting point, a destination point and intermediate points; computing a temporal-spatial path along which the moving object travels from the starting point through the intermediate points to the destination point; constructing a trajectory for the moving object, wherein the trajectory defines permissible temporal and spatial deviations of actual locations of the moving object relative to expected locations of the moving object on the temporal-spatial path; and displaying the trajectory superimposed on an electronic map. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method for implementing an uncertainty-based trajectory for a moving object, the method comprising:
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obtaining a sequence of expected locations for the moving object including a starting point, a destination point and intermediate points; computing a temporal-spatial path along which the moving object travels from the starting point through the intermediate points to the destination point; and creating a trajectory for the moving object, wherein the trajectory defines permissible spatial and temporal uncertainties in a given actual location of the moving object relative to an expected location along the temporal-spatial path; and displaying the trajectory superimposed on an electronic map. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification