Position prediction for authentication of a mobile transmitter

• US 20030022656A1
• Filed: 06/08/2001
• Published: 01/30/2003
• Est. Priority Date: 06/08/2001
• Status: Abandoned Application

• Current Assignee: Karma Automotive LLC (Wanxiang Group Corporation)
• Original Assignee: Karma Automotive LLC (Wanxiang Group Corporation)
• Inventors: Hinnant, Harris O. Jr., Olmstead, David N.
• Application Number:
  US09/877,663
• Publication Number:
  US 20030022656A1
• Time in Patent Office: Days
• US Class Current: 455/410
• CPC Class Codes: G01S 19/42 Determining position
• CPC Class Codes: G01S 5/0294 Trajectory determination or predictive filtering, e.g. target tracking or Kalman filtering
• CPC Class Codes: H04L 63/126 the source of the received data
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 12/10 Integrity
• CPC Class Codes: H04W 12/63 Location-dependent; Proximity-dependent

Abstract

The present invention enables authentication of a mobile source by verifying that a reported position corresponds to a predicted position within a dynamically defined region of uncertainty. The dynamically defined region of uncertainty can express the statistical confidence of the authentication results. The region of uncertainty is dynamically defined by incorporating position, mobility vector, and other data that are determined during the authentication process.

Claims

1. A method for authenticating a mobile source, the method comprising the steps of:

obtaining data defining a first position, a statistical accuracy of the first position, and a mobility vector of a mobile source at a first time;

obtaining data defining a second position of the mobile source at a second time;

determining a time differential between the second time and the first time;

predicting a position of the mobile source at the second time based on the first position, the statistical accuracy of the first position, the mobility vector, and the time differential;

dynamically defining a region encompassing the predicted position such that the dynamically defined region embodies a statistical representation of the accuracy of the predicted position; and

verifying the second position is within the dynamically defined region.

2. The method of claim 1 wherein the statistical representation of the accuracy of the predicted position is a standard deviation.

3. The method of claim 2 wherein the region is defined based on the first position, the statistical accuracy of the first position, the mobility vector, the time differential, and the standard deviation of the predicted position.

4. The method of claim 2 wherein the region is defined based on at least one of the first position, the statistical accuracy of the first position, the mobility vector, the time differential, or the standard deviation of the predicted position.

5. The method of claim 1 wherein the statistical representation is quantifiable to approximately sixty-eight percent confidence.

6. The method of claim 1 wherein the statistical representation is quantifiable to approximately 99.8% confidence.

7. The method of claim 1 wherein the mobility vector is chosen from a group consisting of velocity, acceleration, and boost.

8. A method for authenticating a mobile source, the method comprising the steps of:

receiving a first reported position and a first velocity of a mobile source at a first time;

predicting a second position of the mobile source at a second time based on the first position, the first velocity, and a time differential between the second time and the first time;

dynamically defining a region encompassing the predicted second position such that the dynamically defined region incorporates a statistical standard deviation of the predicted second position;

receiving a second reported position of the mobile source at the second time; and

verifying the second reported position is within the dynamically defined region encompassing the predicted second position.

9. The method of claim 8 further comprising the steps of:

receiving a first acceleration of the mobile source at the first time; and

using the first acceleration in the step of predicting a second position.