Utilizing broadcast signals to convey restricted association information

• US 8,848,656 B2
• Filed: 11/12/2008
• Issued: 09/30/2014
• Est. Priority Date: 11/16/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Horn, Gavin B., Ulupinar, Fatih, Agashe, Parag A., Prakash, Rajat, Khandekar, Aamod, Gorokhov, Alexei, Bhushan, Naga
• Primary Examiner(s): Faroul, Farah
• Application Number:
  US12/269,637
• Publication Number:
  US 20090129338A1
• Time in Patent Office: 2,148 Days
• Field of Search: 370/252, 370/328, 370/331, 370/332, 370/334
• US Class Current: 370/331
• CPC Class Codes: H04W 36/0007 for multicast or broadcast services, e.g. MBMS multicast or broadcast application services H04W4/06; resource management for broadcast services H04W72/30; connection management for selective distribution or broadcast H04W76/40
• CPC Class Codes: H04W 36/0061 of neighbour cell information
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 48/02 Access restriction performed under specific conditions
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/10 using broadcasted information

Abstract

Systems and methodologies are described that facilitate transmitting access point types and/or restricted association parameters using broadcast signals, such as beacons, pilot signals, and the like. The type or restricted association information can be indicated by one or more intrinsic aspects of the signal, such as specified parameters. In addition, the type or information can be indicated by one or more extrinsic signal aspects, such as frequency, interval, periodicity, and the like. Using this information, a mobile device can determine whether an access point implements restricted association. If so, the mobile device can request an access point or related group identifier before determining whether to establish connection therewith. The identifier can be verified against a list of accessible access points or groups to make the determination.

Claims

1. A method for determining cell information at a mobile station for reselection in a wireless communication network, comprising:

determining, by the mobile station, a restricted association indicator from a broadcast signal received from a femto access point;

obtaining, by the mobile station, a group identifier related to the femto access point from the broadcast signal based at least in part on the restricted association indicator;

determining, by the mobile station, whether the group identifier is present in a maintained list of accessible femto access points; and

establishing communication with the femto access point when it is determined that the group identifier is present in the maintained list of accessible femto access points.

2. The method of claim 1, wherein establishing communication with the femto access point comprises one of:

performing cell reselection to the access point in idle mode, or entering connected mode.

3. The method of claim 1, wherein establishing communication with the femto access point comprises transmitting a connection establishment request to the femto access point.

4. The method of claim 1, wherein determining the restricted association indicator is based at least in part on evaluating one or more extrinsic aspects of the broadcast signal.

5. The method of claim 4, wherein the one or more extrinsic aspects include an interval at which subsequent broadcast signals are received from the femto access point.

6. The method of claim 5, wherein the broadcast signal is a beacon signal repeatedly transmitted by the femto access point at the interval.

7. The method of claim 1, wherein the restricted association indicator is comprised within the broadcast signal as one or more parameters thereof.

8. The method of claim 1, wherein the femto access point is a femtocell and the group identifier relates to a group of femtocells having a common service provider.

9. The method of claim 1, further comprising obtaining a sector identifier of the femto access point from the broadcast signal on a subsequent communication establishment attempt.

10. The method of claim 9, further comprising requesting subsequent communication establishment based at least in part on the sector identifier.

11. The method of claim 1, wherein the group identifier is text based.

12. The method of claim 1, wherein the restricted association indicator indicates the femto access point is restricted regarding providing one or more of:

signaling, data access, registration, and service.

13. The method of claim 1, wherein the restricted association indicator comprises a Boolean value, the method further comprising:

determining that the femto access point is a restricted association access point based on the value of the restricted association indicator;

determining whether the restricted association access point belongs to a preferred access point group of the mobile device based on the group identifier; and

performing cell reselection to the restricted association access point when it is determined that the restricted association access point belongs to the preferred access point group.

14. The method of claim 1, wherein the femto access point is a first access point, the method comprising:

receiving a broadcast signal from at least a second access point;

determining a type of the first and second access points based on restricted association indicators from their corresponding broadcast signals; and

performing cell reselection to the first access point when it is determined that the first access point is a femtocell and that the group identifier of the first access point is present in the maintained list of accessible group identifiers.

15. A wireless communications apparatus, comprising:

at least one processor configured to;

receive a broadcast signal from a femto access point;

determine a restricted association indicator from the broadcast signal;

obtain from the broadcast signal, a group identifier related to the femto access point based at least in part on the restricted association indicator; and

communicate with the femto access point when it is determined that the group identifier is present in a list of preferred femto access points; and

a memory coupled to the at least one processor.

16. The wireless communications apparatus of claim 15, wherein the restricted association indicator comprises a Boolean value, and wherein the wireless communication apparatus is configured to:

determine that the femto access point is a restricted association access point based on the value of the restricted association indicator;

determine whether the restricted association access point belongs to a preferred access point group of the mobile device based on the group identifier; and

perform cell reselection to the restriction association access point when it is determined that the restricted association access point belongs to the preferred access point group.

17. The wireless communications apparatus of claim 15, wherein the femto access point is a first access point, and wherein the wireless communication apparatus is configured to:

receive a broadcast signal from at least a second access point;

determine a type of the first and second access points based on restricted association indicators from their corresponding broadcast signals; and

perform cell reselection to the first access point when it is determined that the first access point is a femtocell and that the group identifier of the first access point is present in the maintained list of accessible group identifiers.

18. A wireless communications apparatus that facilitates communicating with an access point in a wireless network, comprising:

means for determining a restricted association indicator from a broadcast signal received from a femto access point;

means for determining from the broadcast signal, a group identifier of the femto access point based at least in part on the restricted association indicator; and

means for communicating with the femto access point when it is determined by the wireless communication apparatus that the group identifier is present in a list of preferred femto access points.

19. A computer program product, comprising:

a non-transitory computer-readable medium comprising;

code for causing a mobile device to determine a restricted association indicator from a broadcast signal received from a femto access point;

code for causing the mobile device to obtain a group identifier related to the femto access point from the broadcast signal based at least in part on the restricted association indicator;

code for causing the mobile device to determine whether the group identifier is present in a maintained list of accessible femto access points; and

code for causing the mobile device to establish communication with the femto access point when it is determined that the group identifier is present in the maintained list of accessible femto access points.

20. An apparatus, comprising:

a restricted association indicator identifier that determines a restricted association indicator from a broadcast signal received from a femto access point;

an access point identifier determiner that obtains an access point group identification related to the femto access point from the broadcast signal based at least in part on the restricted association indicator and determines whether the group identifier is present in a maintained list of accessible femto access points; and

a cell reselector that establishes communication with the femto access point when it is determined that the group identification is present in the maintained list of accessible femto access points.

21. The apparatus of claim 20, wherein the cell reselector establishes communication with the femto access point by one of:

performing cell reselection to the femto access point in idle mode, or entering connected mode.

22. The apparatus of claim 21, wherein the cell reselector establishes communication with the femto access point by transmitting an access request to the femto access point.

23. The apparatus of claim 20, wherein the restricted association indicator identifier determines the restricted association indicator based at least in part on evaluating one or more extrinsic aspects of the broadcast signal.

24. The apparatus of claim 23, wherein the one or more extrinsic aspects include an interval at which subsequent broadcast signals are received from the femto access point.

25. The apparatus of claim 24, wherein the broadcast signal is a beacon signal repeatedly transmitted by the femto access point at the interval.

26. The apparatus of claim 20, wherein the restricted association indicator identifier determines the restricted association indicator from one or parameters comprised within the broadcast signal.

27. The apparatus of claim 20, wherein the restricted association indicator identifier obtains a sector identifier of the femto access point from the broadcast signal on a subsequent communication establishment attempt.

28. The apparatus of claim 27, wherein the cell reselector requests subsequent communication establishment based at least in part on the sector identifier.

29. The apparatus of claim 20, wherein the restricted association indicator indicates the femto access point is restricted regarding providing one or more of:

signaling, data access, registration, and service.