System and method for detecting an unlicensed mobile alliance (UMA) service in GSM wireless communication networks

• US 7,965,675 B2
• Filed: 08/22/2005
• Issued: 06/21/2011
• Est. Priority Date: 08/22/2005
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility, Inc. (Lenovo Group Ltd.)
• Inventors: Rahim, Nighat
• Primary Examiner(s): Shah; Chirag G
• Assistant Examiner(s): Thompson, Jr.; Otis L
• Application Number:
  US11/210,030
• Publication Number:
  US 20070060125A1
• Time in Patent Office: 2,129 Days
• Field of Search: 370/401, 370/465, 370/351, 370/352, 370/328, 370/238
• US Class Current: 370/328
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Techniques are provided for scanning for access points with a wireless communication device including a baseband processor and a WLAN processor. A data download command which defines a preferred network list can be sent from the baseband processor to the WLAN processor. In addition, a first scan command can be sent from the baseband processor which triggers the WLAN processor to independently begin periodically scanning a number channels.

Claims

1. A wireless communication device configured to scan for an access point, comprising:

a baseband processor configured to generate a data download command comprising a preferred network list comprising a list of preferred network identifiers associated with access points to be scanned for, and a first scan command when the baseband processor enters deep sleep mode; and

a WLAN processor configured to receive the data download command and the first scan command, wherein the first scan command informs the WLAN processor that the baseband processor is entering deep sleep mode and triggers the WLAN processor to independently begin scanning a number channels corresponding to the preferred network identifiers while the baseband processor is deactivated.

2. A wireless communication device according to claim 1, wherein the preferred network list defines scanning criteria for use by the WLAN processor comprising a defined scanning interval.

3. A wireless communication device according to claim 1, wherein the WLAN processor, responsive to the first scan command, is configured to begin periodically scanning the number channels for each preferred identifier at the defined scanning interval.

4. A wireless communication device according to claim 3, wherein the baseband processor is configured to enter into a lowest power mode during intervals between the defined scanning interval.

5. A wireless communication device according to claim 3, wherein the WLAN processor is configured to detect network identifiers and compare each detected network identifier to the list of preferred network identifiers to determine whether the detected network identifiers match one of the preferred network identifiers.

6. A wireless communication device according to claim 5, wherein the WLAN processor is configured to generate a wake-up command for the baseband processor if the WLAN processor finds a match between one of the detected network identifiers and one of the preferred network identifiers.

7. A wireless communication device according to claim 6, wherein the WLAN processor is configured to ignore detected network identifiers which do not match one of the preferred network identifiers.

8. A wireless communication device according to claim 5, wherein the baseband processor remains in the deep sleep mode until one of the preferred network identifiers is detected by the WLAN processor.

9. A wireless communication device according to claim 1, wherein the preferred network identifiers comprise preferred service set identifiers (SSIDs).

10. A wireless communication device according to claim 1, wherein the preferred network identifiers comprise preferred basic service set identifiers (BSSIDs).

11. A wireless communication device according to claim 1, wherein the preferred network identifiers are selected by a user.

12. A wireless communication device according to claim 1, wherein the first scan command triggers the WLAN processor to independently begin scanning while the baseband processor is deactivated without receiving other commands from the baseband processor, wherein the WLAN processor enters a power save mode after scanning the number of channels.

13. A wireless communication device configured to scan for an access point, comprising:

a baseband processor configured to generate a data download command comprising a preferred network list comprising a list of preferred network identifiers associated with access points to be scanned for, a first scan command, and wherein the baseband processor is configured to send a configure wake-up command; and

a WLAN processor configured to receive the data download command and the first scan command, wherein the first scan command triggers the WLAN processor to independently begin scanning a number channels corresponding to the preferred network identifiers while the baseband processor is deactivated, wherein the configure wake-up command defines when the WLAN processor generates a wake-up command for the baseband processor.

14. A wireless communication device according to claim 13, wherein the baseband processor is configured to generate the configure wake-up command for the WLAN processor which specifies that the baseband processor is to be awakened when one of the detected network identifiers matches one of the preferred network identifiers.

15. A method of scanning for an access point with a wireless communication device comprising a baseband processor and a WLAN processor, the method comprising:

sending a data download command from the baseband processor to the WLAN processor, wherein the data download command defines a preferred network list comprising a list of preferred network identifiers associated with access points to be scanned for; and

sending, when the baseband processor enters deep sleep mode, a first scan command from the baseband processor to a firmware module of the WLAN processor, wherein the first scan command indicates that the baseband processor is entering deep sleep mode and triggers the WLAN processor to independently begin scanning a number channels corresponding to the preferred network identifiers at a defined scanning interval while the baseband processor is deactivated.

16. A method according to claim 15, wherein the preferred network list defines scanning criteria for use by the WLAN processor.

17. A method according to claim 15, wherein the first scan command triggers the WLAN processor to begin periodically scanning the number channels for each preferred network identifier at the defined scanning interval without waiting for a second scan command from the baseband processor.

18. A method according to claim 17, wherein the baseband processor enters into a lowest power mode during intervals between the defined scanning interval.

19. A method according to claim 17, the method further comprising:

detecting one or more network identifiers at the WLAN processor; and

comparing each detected network identifier to the list of preferred network identifiers to determine whether one of the detected network identifiers matches one of the preferred network identifiers.

20. A method according to claim 19, the method further comprising:

sending a wake-up command to the baseband processor if the WLAN processor finds a match between one of the detected network identifiers and one of the preferred network identifiers.

21. A method according to claim 20, the method further comprising:

ignoring detected network identifiers at the WLAN processor which do not match one of the preferred network identifiers.

22. A method according to claim 15, the method further comprising:

sending a configure wake-up command from the baseband processor to the WLAN processor, wherein the configure wake-up command defines when a wake-up command is to be sent to the baseband processor.

23. A method according to claim 22, the method further comprising:

sending the configure wake-up command from the baseband processor to the WLAN processor, wherein the configure wake-up command specifies that the baseband processor is to be awakened when one of the detected network identifiers matches one of the preferred network identifiers.

24. A method according to claim 15, wherein the preferred network identifiers comprise preferred service set identifiers (SSIDs).

25. A method according to claim 15, wherein the preferred network identifiers comprise preferred basic service set identifiers (BSSIDs).

26. A method according to claim 15, wherein the preferred network identifiers are selected by a user.

27. A wireless communication device configured to scan for an access point in accordance with a user-defined scan interval, the wireless communication device comprising:

a WLAN processor; and

a baseband processor configured to generate;

a data download command comprising a preferred network list comprising a list of preferred network identifiers associated with access points to be scanned for and scanning criteria for use by the WLAN processor including the user-defined scanning interval, and

a first scan command when the baseband processor enters deep sleep mode,

wherein the WLAN processor is configured to;

receive the data download command and the first scan command, wherein the first scan command informs the WLAN processor that the baseband processor has entered deep sleep mode;

scan, in response to the first scan command, a number channels corresponding to the preferred network identifiers associated with access points to be scanned for according at the user-defined scanning interval.

28. A wireless communication device according to claim 27, wherein the baseband processor is configured to enter into a lowest power mode during intervals between the user-defined scanning interval.

29. A wireless communication device according to claim 27, wherein the WLAN processor is configured to:

detect network identifiers; and

determine whether the detected network identifiers match one of the preferred network identifiers.

30. A wireless communication device according to claim 27, wherein the baseband processor is configured to:

generate a configure wake-up command for the WLAN processor which specifies that the baseband processor is to be awakened when one of the detected identifiers matches one of the preferred network identifiers; and

send a configure wake-up command that defines when the WLAN processor generates a wake-up command for the baseband processor.

31. A wireless communication device according to claim 30, wherein the WLAN processor is configured to:

generate a wake-up command for the baseband processor if the WLAN processor finds a match between one of the detected network identifiers and one of the preferred network identifiers.

32. A wireless communication device according to claim 27, wherein the preferred network identifiers comprise preferred service set identifiers (SSIDs).

33. A wireless communication device according to claim 27, wherein the preferred network identifiers comprise preferred basic service set identifiers (BSSIDs).

34. A wireless communication device according to claim 27, wherein the preferred network identifiers are selected by a user.