Method and system for querying in a moving object database
First Claim
Patent Images
1. A method of querying trajectory data for a moving object, the method comprising:
- receiving from a user at least one query input parameter;
accessing a trajectory for a moving object, wherein the trajectory defines permissible spatial and temporal uncertainties in actual locations of the moving object relative to expected locations of the moving object along a temporal-spatial path that the moving object travels from a starting location through intermediate locations to a destination location; and
performing a query on the trajectory, wherein the query uses as an input the at least one query input parameter received from the user.
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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.
21 Citations
30 Claims
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1. A method of querying trajectory data for a moving object, the method comprising:
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receiving from a user at least one query input parameter; accessing a trajectory for a moving object, wherein the trajectory defines permissible spatial and temporal uncertainties in actual locations of the moving object relative to expected locations of the moving object along a temporal-spatial path that the moving object travels from a starting location through intermediate locations to a destination location; and performing a query on the trajectory, wherein the query uses as an input the at least one query input parameter received from the user. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of querying trajectory data, the method comprising:
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receiving from a user at least one query input parameter; accessing respective trajectories for each of a plurality of moving objects, wherein each respective trajectory defines permissible spatial and temporal uncertainties in actual locations of one of the moving objects relative to expected locations of the moving object along a temporal-spatial path that the moving object travels from a starting location through intermediate locations to a destination location; and performing a query on the trajectories, wherein the query uses as an input the at least one query input parameter. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification