Systems and methods for providing location-aware Wi-Fi access for a portable device

• US 8,598,984 B2
• Filed: 05/07/2009
• Issued: 12/03/2013
• Est. Priority Date: 05/09/2008
• Status: Active Grant

• Current Assignee: NXP USA, Inc. (NXP Semiconductors NV)
• Original Assignee: Marvell World Trade Limited (Marvell Technology Group Limited)
• Inventors: Chhabra, Kapil, Goel, Sandesh
• Primary Examiner(s): SYED, NABIL H
• Application Number:
  US12/437,312
• Publication Number:
  US 20090278705A1
• Time in Patent Office: 1,671 Days
• Field of Search: 340/539.1, 340/539.2, 340/539.23, 340/539.32, 340/572.1, 340/572.5, 340/572.7, 340/1.1, 340/8.1, 340/10.1, 340/10.2, 340/10.3, 340/10.34, 340/10.4, 340/10.41, 455/45.1, 455/456.2, 455/411, 455/434, 455/440, 455/441, 455/442, 455/67.11, 455/552.1
• US Class Current: 340/8.1
• CPC Class Codes: H04W 12/50 Secure pairing of devices
• CPC Class Codes: H04W 4/025 using location based information parameters
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Methods and systems for providing location-aware WiFi access for a portable device include determining an initial location of the portable device and transmitting the initial location to a WiFi location provider, wherein the WiFi location provider comprises locations and WiFi parameters for a plurality of WiFi access points, wherein each WiFi access point has a corresponding wireless range. The locations and the WiFi parameters for a set of WiFi access points are then received from the WiFi location provider, wherein the set of WiFi access points are within a radius of the initial location of the portable device. At least one WiFi access point in the set of WiFi access points is scanned for that contains the portable device within its wireless range. The portable device then connects to the at least one WiFi access point, thereby forming a WiFi connection.

Claims

1. A method for providing location-aware WiFi access for a portable device, the method comprising:

determining an initial location of the portable device;

transmitting the initial location of the portable device to a WiFi location provider, wherein the WiFi location provider comprises locations, WiFi parameters, and wireless ranges for a plurality of WiFi access points;

receiving, from the WiFi location provider, a respective location, a respective set of WiFi parameters, and a respective wireless range for each WiFi access point included in a set of WiFi access points, wherein the each WiFi access point included in the set of WiFi access points is within a radius of the initial location of the portable device;

determining a subset of WiFi access points of the set of WiFi access points, each WiFi access point in the subset of WiFi access points containing the portable device within the respective wireless range of the each WiFi access point;

scanning for at least one WiFi access point in the subset of WiFi access points; and

connecting to one of the at least one WiFi access point in the subset of WiFi access points, thereby forming a WiFi connection.

2. The method of claim 1, further comprising, in response to receiving the respective location, the respective set of WiFi parameters, and the respective wireless range for the each WiFi access point included in the set of WiFi access points, selectively powering ON a WiFi transceiver of the portable device when a current location of the portable device falls within the respective wireless range of one or more WiFi access points in the subset and when the portable device is moving at a velocity less than a predetermined velocity.

3. The method of claim 2, further comprising:

powering ON the WiFi transceiver at a later time when the portable device is within a distance 2*d of the current location of the portable device at an initial time when the WiFi connection was formed; and

automatically attempting to reconnect with the one of the at least one WiFi access point by using the respective set of WiFi parameters stored within a profile for the WiFi connection.

4. The method of claim 3, wherein d is configurable.

5. The method of claim 2, further comprising:

providing directions to a user of the portable device to change the current location of the portable device to a suggested location in order to improve quality of the WiFi connection; and

prompting the user for an input confirming that the user is in the suggested location before attempting to reconnect with the one of the at least one WiFi access point.

6. The method of claim 2, wherein the scanning for the at least one WiFi access point in the subset of WiFi access points is performed for a predetermined time, after which the WiFi transceiver is turned OFF if a response is not received from the at least one WiFi access point in the subset of WiFi access.

7. The method of claim 1, wherein the transmitting the initial location to the WiFi location provider is performed using a SMS message, wherein the SMS message comprises coordinates of the portable device.

8. The method of claim 1, wherein the respective set of WiFi parameters comprises at least one of a SSID, a channel number, a band, a security key, a country information element, and quality of service parameters.

9. The method of claim 1, wherein the radius comprises a distance between the portable device and a farthest access point in the set of the WiFi access points.

10. The method of claim 1, wherein the portable device comprises a non-volatile memory, and wherein the method further comprises storing a profile for the WiFi connection in the non-volatile memory, wherein the profile comprises the initial location of the portable device at an initial time when the WiFi connection was formed and the respective set of WiFi parameters of the one of the at least one WiFi access point with which the WiFi connection was formed.

11. A portable device that provides location-aware WiFi access, the portable device comprising:

a WiFi transceiver; and

a processor, wherein the processor is configured to;

determine an initial location of the portable device;

transmit the initial location of the portable device to a WiFi location provider, wherein the WiFi location provider comprises locations and WiFi parameters for a plurality of WiFi access points, wherein each WiFi access point has a respective wireless range;

receive a respective location, a respective set of WiFi parameters, and the respective range for each WiFi access point included in a set of WiFi access points from the WiFi location provider, wherein the each WiFi access point included in the set of WiFi access points is within a radius of the initial location of the portable device;

determine a subset of WiFi access points of the set of WiFi access points, each WiFi access point in the subset of WiFi access points containing the portable device within the respective wireless range of the each WiFi access point;

scan for at least one WiFi access point in the subset of WiFi access points; and

connect to one of the at least one WiFi access point in the subset of WiFi access points, thereby forming a WiFi connection.

12. The portable device of claim 11, wherein the processor is further configured to, in response to receiving the respective location, the respective set of WiFi parameters, and the respective wireless range for the each WiFi access point included in the set of WiFi access points, selectively power ON a WiFi transceiver of the portable device when a current location of the portable device falls within the respective wireless range of one or more WiFi access points in the subset and when the portable device is moving at a velocity less than a predetermined velocity.

13. The portable device of claim 12, wherein the WiFi transceiver is powered ON at a later time when the portable device is within a distance 2*d of the current location of the portable device at an initial time when the WiFi connection was formed, and wherein the processor is further configured to automatically attempt to reconnect with the one of the at least one WiFi access point by using the respective set of WiFi parameters stored within a profile for the WiFi connection.

14. The portable device of claim 13, wherein d is configurable.

15. The portable device of claim 12, wherein a user of the portable device is provided with directions to change the current location of the portable device to a suggested location in order to improve quality of the WiFi connection, and wherein the processor is further configured to prompt the user for an input confirming that the user is in the suggested location before attempting to reconnect with the one of the at least one WiFi access point.

16. The portable device of claim 12, wherein the scan for the at least one WiFi access point in the subset of WiFi access points is performed for a predetermined time, after which the WiFi transceiver is turned OFF if a response is not received.

17. The portable device of claim 11, wherein the processor is configured to transmit the initial location to the WiFi location provider by using a SMS message, wherein the SMS message comprises coordinates of the portable device.

18. The portable device of claim 11, wherein the respective set of WiFi parameters comprises at least one of a SSID, a channel number, a band, a security key, a country information element, and quality of service parameters.

19. The portable device of claim 11, wherein the radius comprises a distance between the portable device and a farthest access point in the set of the WiFi access points.

20. The portable device of claim 11, wherein the portable device comprises a non-volatile memory, and wherein the processor is further configured to store a profile for the WiFi connection in the non-volatile memory, wherein the profile comprises the initial location of the portable device at an initial time when the WiFi connection was formed and the respective set of WiFi parameters of the one of the at least one WiFi access point with which the WiFi connection was formed.

21. A memory for use in a portable device, the memory storing program instructions for providing location-aware WiFi access for the portable device, and the program instructions being executable by a processor to:

determine an initial location of the portable device;

transmit the initial location to a WiFi location provider, wherein the WiFi location provider comprises locations and WiFi parameters for a plurality of WiFi access points, wherein each WiFi access point has a respective wireless range;

receive, from the WiFi location provider, a respective location, a respective set of WiFi parameters, and the respective range for each WiFi access point included in a set of WiFi access points, wherein the each WiFi access point included in the set of WiFi access points is within a radius of the initial location of the portable device;

determine a subset of WiFi access points in the set of WiFi access points, each WiFi access point in the subset of WiFi access points containing the portable device within the respective wireless range of the each WiFi access point;

scan for at least one WiFi access point in the subset of WiFi access; and

connect to one of the at least one WiFi access point in the subset, thereby forming a WiFi connection.

22. The memory of claim 21, storing further program instructions executable by the processor to:

in response to receiving the respective location, the respective set of WiFi parameters, and the respective wireless range for the each WiFi access point included in the set of WiFi access points, selectively power ON a WiFi transceiver of the portable device when a current location of the portable device falls within the respective wireless range of one or more access points in the subset and when the portable device is moving at a velocity less than a predetermined velocity.

23. The memory of claim 22, storing further program instructions executable by the processor to:

power ON the WiFi transceiver at a later time when the portable device is within a distance 2*d of the current location of the portable device at an initial time when the WiFi connection was formed; and

automatically attempt to reconnect with the one of the at least one WiFi access point by using the respective set of WiFi parameters stored within a profile for the WiFi connection.

24. The memory of claim 23, wherein d is configurable.

25. The memory of claim 22, storing further program instructions executable by the processor to:

provide directions to a user of the portable device to change the current location of the portable device to a suggested location in order to improve quality of the WiFi connection; and

prompt the user for an input confirming that the user is in the suggested location before attempting to reconnect with the one of the at least one WiFi access point.

26. The memory of claim 22, wherein the scan for the at least one WiFi access point is performed for a predetermined time, after which the WiFi transceiver is turned OFF if a response is not received.

27. The memory of claim 21, wherein the transmission of the initial location to the WiFi location provider is performed using a SMS message, and wherein the SMS message comprises coordinates of the portable device.

28. The memory of claim 21, wherein the respective set of WiFi parameters comprises at least one of a SSID, a channel number, a band, a security key, a country information element, and quality of service parameters.

29. The memory of claim 21, wherein the radius comprises a distance between the portable device and a center of a farthest of in the set of the WiFi access points.

30. The memory of claim 21, wherein the portable device comprises a non-volatile memory, and wherein the memory further stores program instructions executable by the processor to store a profile for the WiFi connection in the non-volatile memory of the portable device, wherein the profile comprises the initial location of the portable device at an initial time when the WiFi connection was formed and the respective set of WiFi parameters of the one of the at least one WiFi access point with which the WiFi connection was formed.