Method and system for verifying the position of a mobile station based on multiple positions

• US 6,768,910 B2
• Filed: 09/20/2001
• Issued: 07/27/2004
• Est. Priority Date: 09/20/2001
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Gutowski, Gerald, Benes, Stanley J.
• Primary Examiner(s): Eng, George
• Application Number:
  US09/960,458
• Publication Number:
  US 20030054835A1
• Time in Patent Office: 1,041 Days
• Field of Search: 455/456--45, 455/404.2, 455/423, 455/67.11, 455/67.16, 455/440, 455/421, 455/457, 701/214, 701/216, 701/213, 701/357.09, 342/357-1-3, 342/450, 342/457, 342/459
• US Class Current: 455/456.1
• CPC Class Codes: G01S 5/02 using radio waves using satellite radio beacon systems for determining position G01S19/00
• CPC Class Codes: G01S 5/0244 Accuracy or reliability of position solution or of measurements contributing thereto
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

The present invention provides a method and wireless communication system (100) for verifying a position of a mobile station (102). Upon detection of an activation by the mobile station (102), the system (100) compares a first mobile station position and a second mobile station position to generate a result. The system (100) then determines whether the result exceeds a predetermined error tolerance. The system (100) indicates an error associated with the position of the mobile station (102) if the result exceeds the predetermined error tolerance.

Claims

1. A method for verifying a position of a mobile station in a wireless communication system, the method comprising the steps of:

detecting an activation by the mobile station;

comparing a first mobile station position of the mobile station and a second mobile station position of the mobile station to generate a result;

determining whether the result exceeds a predetermined error tolerance; and

indicating an error associated with the position of the mobile station if the result exceeds the predetermined error tolerance.

2. The method of claim 1, wherein the activation is a user activation of a verification button on the mobile station.

3. The method of claim 1, wherein the activation is a planned activation managed by one of the mobile station and a wireless infrastructure of the wireless communication system.

4. The method of claim 1, wherein the activation is a random activation initiated by a random time generator.

5. The method of claim 1, wherein the activation is a sensed activation triggered by a checkpoint signal received by the mobile station.

6. The method of claim 1, wherein the first and second mobile station positions are determined by the mobile station.

7. The method of claim 1, wherein the first mobile station position is determined by a terrestrial positioning system and the second mobile station position is determined by a celestial positioning system.

8. The method of claim 1, wherein:

the first mobile station position is determined by the mobile station and the second mobile station position is determined by a wireless infrastructure of the wireless communication system; and

the mobile station receives the second mobile station position from the wireless infrastructure.

9. The method of claim 1, further comprising the steps of:

detecting whether at least one of a system timing error, a BTS timing error, an algorithm error, an extreme multipath occurrence and a device timing error has occurred; and

executing an error correction routine if at least one of the system timing error, the BTS timing error, the algorithm error, the extreme multipath occurrence and device timing error has been detected.

10. A wireless communication system for verifying a position of a mobile station comprising:

a position circuit adapted to generate first and second mobile station positions of the mobile station in response to an activation by the mobile station; and

a processor coupled to the position circuit, the processor being operable to compare the first mobile station position and the second mobile station position to generate a result, and indicate an error associated with the position of the mobile station if the result exceeds a predetermined error tolerance.

11. The wireless communication system of claim 10, wherein the activation is a user activation of a verification button on the mobile station.

12. The wireless communication system of claim 10, wherein the activation is a planned activation managed by one of the mobile station and a wireless infrastructure of the wireless communication system.

13. The wireless communication system of claim 10, wherein the activation is a random activation initiated by a random time generator.

14. The wireless communication system of claim 10, wherein the activation is a sensed activation triggered by a checkpoint signal received by the mobile station.

15. The wireless communication system of claim 10, wherein the first and second mobile station positions are determined by the mobile station.

16. The wireless communication system of claim 10, wherein the first mobile station position is determined by a terrestrial positioning system and the second mobile station position is determined by a celestial positioning system.

17. The method of claim 10, wherein:

the first mobile station position is determined by the mobile station and the second mobile station position is determined by a wireless infrastructure of the wireless communication system; and

the mobile station receives the second mobile station position from the wireless infrastructure.

18. The wireless communication system of claim 10, wherein the processor executes an error correction routine if at least one of a system timing error, a BTS timing error, an algorithm error, an extreme multipath occurrence and a device timing error is detected.