Method of and system for determining route speed of a mobile navigation unit movable along a route segment of a route having a plurality of intersections
First Claim
1. A method of determining route speed of a mobile global positioning satellite (GPS) navigation unit along a route comprised of a plurality of route segments across a plurality of intersections, each route segment measured from a first location immediately after a prior intersection along a direction of travel to a second location immediately after a subsequent intersection along the direction of travel, the method comprising:
- locating a first intersection of the plurality of intersections and a second intersection of the plurality of intersections following the first intersection in the direction of travel and along the route, identifying a first intersection start boundary point for all available particular route segments from immediately past the first intersection in the direction of travel to each available end boundary point immediately past each of a plurality of respective navigation options at the second intersection;
receiving, at an electronic processor of a control unit, geographic location information of the mobile navigation unit at an initial trajectory point located at the start boundary point, and at a subsequent trajectory point at one of the end boundary points associated with a selected one of the available particular route segments;
identifying, by the electronic processor of a control unit, an initial trajectory time at which the mobile navigation unit was at the initial trajectory point, and a subsequent trajectory time at which the mobile navigation unit was at the subsequent trajectory point;
obtaining, by the electronic processor of a control unit, a differential trajectory distance between the subsequent and the initial trajectory points;
obtaining, by the electronic processor of a control unit, a differential trajectory time between the subsequent and the initial trajectory times; and
determining, by the electronic processor of a control unit, a route speed of the selected one of the available particular route segments along the route by dividing the differential trajectory distance by the differential trajectory time.
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Accused Products
Abstract
The route speed of a mobile global positioning satellite (GPS) navigation unit in a vehicle movable along one of a plurality of available route segments of a route having a plurality of intersections, is determined by locating a first and a second of the intersections, by locating a start boundary point, by locating a plurality of end boundary points for all the route segments, and by receiving geographic location information of the vehicle at an initial trajectory point located past the start boundary point, and a subsequent trajectory point past the end boundary point in the one route segment into which the vehicle moved. The trajectory points are associated with trajectory times. A server determines the route speed of the one route segment by dividing a differential distance between the trajectory points by a differential time between the trajectory times. The route speed of the other route segments is likewise determined to aid in route optimization.
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Citations
12 Claims
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1. A method of determining route speed of a mobile global positioning satellite (GPS) navigation unit along a route comprised of a plurality of route segments across a plurality of intersections, each route segment measured from a first location immediately after a prior intersection along a direction of travel to a second location immediately after a subsequent intersection along the direction of travel, the method comprising:
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locating a first intersection of the plurality of intersections and a second intersection of the plurality of intersections following the first intersection in the direction of travel and along the route, identifying a first intersection start boundary point for all available particular route segments from immediately past the first intersection in the direction of travel to each available end boundary point immediately past each of a plurality of respective navigation options at the second intersection; receiving, at an electronic processor of a control unit, geographic location information of the mobile navigation unit at an initial trajectory point located at the start boundary point, and at a subsequent trajectory point at one of the end boundary points associated with a selected one of the available particular route segments; identifying, by the electronic processor of a control unit, an initial trajectory time at which the mobile navigation unit was at the initial trajectory point, and a subsequent trajectory time at which the mobile navigation unit was at the subsequent trajectory point; obtaining, by the electronic processor of a control unit, a differential trajectory distance between the subsequent and the initial trajectory points; obtaining, by the electronic processor of a control unit, a differential trajectory time between the subsequent and the initial trajectory times; and determining, by the electronic processor of a control unit, a route speed of the selected one of the available particular route segments along the route by dividing the differential trajectory distance by the differential trajectory time. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for determining route speed of a mobile global positioning satellite (GPS) navigation unit movable along a route comprised of a plurality of route segments across a plurality of intersections, each route segment measured from a first location immediately after a prior intersection along a direction of travel to a second location immediately after a subsequent intersection along the direction of travel, the system comprising:
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a server for locating a first intersection of the plurality of intersections and a second intersection of the plurality of intersections following the first intersection in the direction of travel and along the route, a first intersection start boundary point for all available particular route segments from immediately past the first intersection in the direction of travel to each available end boundary point immediately past each of a plurality of respective navigation options at the second intersection; a transceiver for receiving geographic location information of the mobile navigation unit at an initial trajectory point located at the start boundary point, and at a subsequent trajectory point at one of the end boundary points associated with a selected one of the available particular route segments; the server being operative for identifying an initial trajectory time at which the mobile navigation unit was at the initial trajectory point, and a subsequent trajectory time at which the mobile navigation unit was at the subsequent trajectory point; the server being operative for obtaining a differential trajectory distance between the subsequent and the initial trajectory points; the server being operative for obtaining a differential trajectory time between the subsequent and the initial trajectory times; and the server being operative for determining a route speed of the selected one of the available particular route segments along the route by dividing the differential trajectory distance by the differential trajectory time. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification