Location and mobile-adaptation of wireless access-points using map-based navigation

• US 8,346,478 B2
• Filed: 03/25/2010
• Issued: 01/01/2013
• Est. Priority Date: 03/25/2010
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Roesser, Robert P.
• Primary Examiner(s): Cheung, Mary
• Assistant Examiner(s): MARC, MCDIEUNEL
• Application Number:
  US12/731,858
• Publication Number:
  US 20110238286A1
• Time in Patent Office: 1,013 Days
• Field of Search: 701/1, 701/454, 701/460, 701/461, 701/467, 701/468, 701/503, 701/532, 340/988, 340/990, 340/995.1, 340/995.18, 340/995.24, 296/37.7, 296/37.8, 296/490, 342/357.31, 342/357.34, 342/458, 224/275, 224/277, 224/311, 455/557, 348/143, 348/158
• US Class Current: 701/454
• CPC Class Codes: G01C 21/3893 Transmission of map data from distributed sources, e.g. from roadside stations
• CPC Class Codes: G01S 5/0244 Accuracy or reliability of position solution or of measurements contributing thereto
• CPC Class Codes: G01S 5/02526 using non-dedicated equipment, e.g. user equipment or crowd-sourcing
• CPC Class Codes: H04B 7/01 Reducing phase shift
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A system and method for populating a map database for a vehicle navigation system with the location and type of wireless access points that can be used to update or service wireless systems on the vehicle. The map database can be initially populated with the known wireless access points at the time of manufacture of the vehicle, and then the vehicle communications system can detect new wireless access points as the vehicle travels, which can be stored on the map database. By storing the location and type of the access points in the map database, the vehicle will know the direction of the access point relative to the vehicle, and can compensate for the Doppler shift as a result of the relative movement of the vehicle to the access point.

Claims

1. A method for providing wireless services for a vehicle, said method comprising:

providing a map database on the vehicle; and

populating by a processor the map database with the location and type of a plurality of wireless access points existing along a roadway where the wireless access points provide wireless communications to the vehicle wherein populating the map database includes initially storing the location of the wireless access points in the map database where the vehicle is manufactured.

2. The method according to claim 1 wherein the wireless access points are public-use wireless access points.

3. The method according to claim 1 wherein populating the map database includes detecting wireless access points as the vehicle travels along the roadway and storing the location and type of the wireless access points in the map database when they are detected.

4. The method according to claim 1 wherein the wireless services include updating a vehicle entertainment system.

5. The method according to claim 1 wherein the wireless services include updating the map database.

6. The method according to claim 1 further comprising correcting a Doppler shift caused by the motion of the vehicle relative to an access point by determining a forward vector based on the speed and direction of the vehicle and an access point vector based on the speed and direction of the vehicle relative to the access point and using the forward vector and the access point vector to determine the relative speed of the vehicle to the access point.

7. The method according to claim 1 further comprising providing a steerable antenna on the vehicle that can be turned in the direction of a wireless access point.

8. The method according to claim 1 further comprising mitigating channel variations as a result of phase-shift and amplitude attenuation using a direction of the access points.

9. The method according to claim 1 further comprising mitigating multi-path effects using a directional electromagnetic field model of the vehicle and factoring in the orientation of the vehicle relative to the access points.

10. A method for providing wireless services for a vehicle, said method comprising:

providing a map database on the vehicle associated with a vehicle navigation system;

populating by a processor the map database with the location and type of a plurality of public-use wireless access points existing along a roadway on which the vehicle may travel where the wireless access points provide wireless communications to the vehicle, where populating the map database includes initially storing the location of the wireless access points in the map database when the vehicle is manufactured and detecting wireless access points as the vehicle travels along the roadway and storing the location of the wireless access points in the database when they are detected; and

correcting a Doppler shift caused by the motion of the vehicle relative to an access point.

11. The method according to claim 10 wherein the wireless services include updating the map database.

12. The method according to claim 10 wherein correcting the Doppler shift includes determining a forward vector based on speed and direction of the vehicle and an access point vector based on the speed and direction of the vehicle relative to the access point and using the forward vector and the access point vector to determine the relative speed of the vehicle to the access point.

13. The method according to claim 10 further comprising providing a steerable antenna on the vehicle that can be turned in the direction of a wireless access point.

14. The method according to claim 10 further comprising mitigating channel variations as a result of phase-shift and amplitude attenuation using a direction of the access points.

15. The method according to claim 10 further comprising mitigating multi-path effects using a directional electromagnetic field model of the vehicle and factoring in the orientation of the vehicle relative to the access points.

16. A system for providing wireless services for a vehicle, said system comprising:

a map database on the vehicle; and

means for populating the map database with a plurality of public use wireless access points existing along a roadway where the wireless access points provide wireless communications to the vehicle, said means for populating the map database includes detecting the access points as the vehicle travels, wherein the means for populating the map database also populates the map database with the wireless access points at the time of vehicle manufacture.

17. The system according to claim 16 further comprising means for correcting a Doppler shift caused by the motion of the vehicle relative to an access point by determining a forward vector based on the speed and direction of the vehicle and an access point vector based on the speed and direction of the vehicle relative to the access point and using the forward vector and the access point vector to determine the relative speed of the vehicle to the access point.

18. The system according to claim 16 further comprising means for mitigating channel variations as a result of phase-shift and amplitude attenuation using a direction of the access points and means for mitigating multi-path effects using a directional electromagnetic field model of the vehicle and factoring in the orientation of the vehicle relative to the access points.