Satellite-positioning-system tracking device and method for determining a position of the same

• US 20070182628A1
• Filed: 01/19/2007
• Published: 08/09/2007
• Est. Priority Date: 01/19/2006
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Global Locate Incorporated (Broadcom, Inc.)
• Inventors: Abraham, Charles, Lundgren, David, Pomerantz, Scott
• Granted Patent: US 8,022,867 B2
• Time in Patent Office: Days
• US Class Current: 342/357.430
• CPC Class Codes: G01S 19/06 employing an initial estimate of the location of the receiver as aiding data or in generating aiding data
• CPC Class Codes: G01S 19/34 Power consumption

Abstract

A global navigation satellite system-tracking (“GNSS-tracking”) device and method for determining one or more positions of the GNSS-tracking device utilizing a user-plane service is disclosed. The GNSS-tracking device may comprise: charging and tracking modules adapted to be disengagably coupled together, wherein the tracking module comprises (i) tracking circuitry for determining at least one position of the tracking module using the user-plane service in a satellite positioning system, and (ii) a chargeable source for supplying power to the tracking circuitry when disengaged from the charging module, and wherein the charging module is operable to charge the chargeable source when the charging module is coupled to the tracking module.

Claims

1. A mobile station comprising:

charging and tracking modules adapted to be disengagably coupled together, wherein the tracking module comprises (i) tracking circuitry for determining at least one position of the tracking module using a user-plane service in a satellite positioning system, and (ii) a chargeable source for supplying power to the tracking circuitry when disengaged from the charging module, and wherein the charging module is operable to charge the chargeable source when the charging module is coupled to the tracking module.

2. The mobile station of claim 1, wherein the tracking module further comprises memory for storing the at least one position of the tracking module, wherein the tracking module is operable to provide from the memory the at least one position.

3. The mobile station of claim 1, wherein the tracking circuitry comprises (i) a first receiver for obtaining from the satellite positioning system satellite signals, and (ii) a second receiver for obtaining from the satellite positioning system, via the user plane service, assistance data for determining the position of the tracking module.

4. The mobile station of claim 3, wherein at least one of the satellite signals is attenuated, and wherein the tracking circuitry is operable to use the assistance data to assist the first receiver in obtaining the at least one of the satellite signals that is attenuated.

5. The mobile station of claim 3, wherein the second receiver is operable to (i) exchange with a global user-plane center (i) a request for the assistance data, the assistance data corresponding to a position estimate for the tracking module;

and (ii) exchange with the global user-plane center the assistance data.

6. The mobile station of claim 3, wherein the second receiver is operable to (i) exchange with a user-plane center (i) a request for the assistance data, the assistance data corresponding to a position estimate for the mobile station;

and (ii) exchange with the user-plane center the assistance data.

7. The mobile station of claim 3, wherein the tracking circuitry further includes a processor for processing the assistance data into a form for the first receiver.

8. The mobile station of claim 1, further comprising:

memory for storing the at least one position of the tracking module, wherein the tracking circuitry comprises (i) a receiver for obtaining from the satellite positioning system satellite signals, and (ii) a transceiver for (a) obtaining from the satellite positioning system assistance data for determining at least one current position of the tracking module, and (b) providing from the memory the at least one current position.

9. The mobile station of claim 1, wherein the charging module comprises circuitry for converting energy received from at least one external source into power for charging the chargeable source.

10. The mobile station of claim 9, wherein the charging module further comprises at least one first terminal for receiving the energy from a direct current source, and at least two second terminals for receiving the energy from an alternating current source.

11. The mobile station of claim 9, wherein the charging module further comprises at least two terminals for receiving the energy from an alternating current source, wherein the at least two terminals are hingedly coupled to the charging module.

12. A method of providing location-based services for a mobile station, wherein the mobile station comprises charging and tracking modules adapted to be disengagably coupled together, wherein the tracking module comprises (i) tracking circuitry for determining at least one position of the tracking module a satellite positioning system, and (ii) a chargeable source for supplying power to the tracking circuitry when disengaged from the charging module, and wherein the charging module is operable to charge the chargeable source when the charging module is coupled to the tracking module, the method comprising in combination:

sending from tracker module to a global user-plane center a request for assistance data, wherein the global user-plane center comprises a database containing information generating the assistance data as a function of a position estimate for the tracking module,

generating at the global user-plane center the assistance data, wherein the assistance data corresponds to a position estimate for the tracking module; and

sending to the tracking module the assistance data.

13. The method of claim 12, further comprising:

sending to at least one user-plane center a request for assistance data; and

sending from the user-plane center to the global user-plane center the request for assistance data when the assistance data is not available from the user-plane center.

14. The method of claim 12, further comprising maintaining within the global user-plane center a database of cell identifiers and corresponding position information for each of the cell identifier for network entities located substantially throughout the world.

15. The method of claim 12, wherein when the position estimate is unknown, generating, as at least a portion of the assistance data, satellite ephemeris for all satellites in the satellite positioning system, and wherein supplying such satellite ephemeris to the tracking module responsive to the request for assistance data.

16. The method of claim 13, further comprising:

establishing between the tracking module and the global user-plane center, a user-plane service, wherein supplying such satellite ephemeris to the tracking module occurs the after establishing the user-plane service.

17. The method of claim 16, further comprising:

sending to the tracking module a notification message, wherein the notification message is operable to cause the tracking module to send the request for assistance data.

18. The method of claim 12, further comprising:

sending to the tracking module a notification message, wherein the notification message is operable to cause the tracking module to send the request for assistance data.

19. An system comprising:

a mobile station comprising;

charging and tracking modules adapted to be disengagably coupled together, wherein the tracking module comprises (i) tracking circuitry for determining at least one position of the tracking module using a satellite positioning system, and (ii) a chargeable source for supplying power to the tracking circuitry when disengaged from the charging module, and wherein the charging module is operable to charge the chargeable source when the charging module is coupled to the tracking module; and

memory for storing the at least one position of the tracking module, wherein the tracking module is operable to provide from the memory the at least one position;

a global user-plane center for storing the at least one position received from the mobile station; and

a requestor for sending a request to track the tracking module and for receiving from the global user-plane center the at least one position responsive to the request to track the tracking module.

20. The system of claim 19, wherein the tracking circuitry comprises (i) a receiver for obtaining from the satellite positioning system satellite signals, and (ii) a transceiver for (a) obtaining from the global user-plane center assistance data for determining generating at least one current position of the tracking module, and (b) providing from the memory to the global user-plane center the at least one current position.