Cell selection and reselection for closed subscriber group cells

• US 9,161,298 B2
• Filed: 11/12/2012
• Issued: 10/13/2015
• Est. Priority Date: 03/24/2008
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Somasundaram, Shankar, Wang, Peter S., Olvera-Hernandez, Ulises, Mukherjee, Rajat P.
• Primary Examiner(s): Pham, Chi H
• Assistant Examiner(s): HOM, SHICK C
• Application Number:
  US13/674,450
• Publication Number:
  US 20130065594A1
• Time in Patent Office: 1,065 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04J 11/0093 Neighbour cell search
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• 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 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

A method for cell selection including a closed subscriber group (CSG) cell is described, the method including receiving priority information or reselection information, storing the information at a wireless transmit/receive unit, and applying the priority information for cell selection.

Claims

1. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:

receiving priority information for each of a plurality of communication frequencies;

storing the priority information at the WTRU;

applying the priority information to a Closed Subscriber Group (CSG) cell; and

on a condition that the CSG cell is a highest rank cell and on a condition that the CSG cell is not included in a white list of the WTRU, selecting to a different cell that is not the CSG cell.

2. The method of claim 1, wherein the different cell is a second highest ranked cell.

3. The method of claim 1, wherein the different cell is a different CSG cell.

4. The method of claim 1, wherein the different cell is a macrocell.

5. The method of claim 1, wherein the different cell is on a same communication frequency as the CSG cell.

6. The method of claim 1, wherein on a condition that the CSG cell is the highest rank cell and on a condition that the CSG cell is included in the white list of the WTRU, continuing to camp on the CSG cell.

7. A wireless transmit/receive unit (WTRU) comprising:

a receiver configured to receive priority information for each of a plurality of communication frequencies;

a memory configured to store the priority information at the WTRU; and

a processor configured to;

apply the priority information to a Closed Subscriber Group (CSG) cell; and

on a condition that the CSG cell is a highest rank cell and on a condition that the CSG cell is not included in a white list of the WTRU, select to a different cell that is not the CSG cell.

8. The WTRU of claim 7, wherein the different cell is a second highest ranked cell.

9. The WTRU of claim 7, wherein the different cell is a different CSG cell.

10. The WTRU of claim 7, wherein the different cell is a macrocell.

11. The WTRU of claim 7, wherein the different cell is on a same communication frequency as the CSG cell.

12. The WTRU of claim 7, wherein on a condition that the CSG cell is the highest rank cell and on a condition that the CSG cell is included in the white list of the WTRU, continuing to camp on the CSG cell.

13. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:

detecting a cell;

determining whether the cell is a Closed Subscriber Group (CSG) cell;

reading an infra-frequency reselection indication associated with the cell;

not reselecting to a different cell regardless of the value of the intra-frequency reselection indication on a condition that the cell is a CSG cell; and

on a condition that the cell is not a CSG cell, reselecting to another cell that is on a different frequency from the cell on a condition that the intra-frequency reselection indication indicates that intra-frequency reselection is not allowed.

14. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:

detecting a cell;

determining whether the cell is a Closed Subscriber Group (CSG) cell;

reading an infra-frequency reselection indication associated with the cell; and

not reselect to a different cell regardless of the value of the intra-frequency reselection indication on a condition that the cell is a CSG cell; and

on a condition that the cell is not a CSG cell, reselecting to another cell that is on a same frequency as the cell on a condition that the intra-frequency reselection indication indicates that intra-frequency reselection is allowed.

15. A wireless transmit/receive unit (WTRU) comprising:

a processor, a transmitter, and a receiver configured to;

detect a cell;

determine whether the cell is a Closed Subscriber Group (CSG) cell;

read an intra-frequency reselection indication associated with the cell; and

not reselect to a different cell regardless of the value of the intra-frequency reselection indication on a condition that the cell is a CSG cell, and

on a condition that the cell is not a CSG cell, reselect to another cell that is on a different frequency from the cell on a condition that the intra-frequency reselection indication indicates that intra-frequency reselection is not allowed.

16. A wireless transmit/receive unit (WTRU) comprising:

a processor, a transmitter, and a receiver configured to;

detect a cell;

determine whether the cell is a Closed Subscriber Group (CSG) cell;

read an intra-frequency reselection indication associated with the cell; and

not reselect to a different cell regardless of the value of the intra-frequency reselection indication on a condition that the cell is a CSG cell, and

on a condition that the cell is not a CSG cell, reselect to another cell that is on a same frequency as the cell on a condition that the intra-frequency reselection indication indicates that intra-frequency reselection is allowed.

17. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:

detecting at least one available Closed Subscriber Group (CSG) cell;

providing, to a user of the WTRU, a list that includes the at least one available CSG cell; and

receiving input, from the user of the WTRU, regarding the at least one available CSG cell included in the list,

wherein the input indicates a priority order of the at least one available CSG cell.

18. The method of claim 17, wherein the list includes CSG cells of the at least one available CSG cell that are not included on a white list of the WTRU.

19. The method of claim 17, wherein the list includes CSG cells of the at least one available CSG cell that do not satisfy at least one radio-related criteria.

20. The method of claim 17, wherein the input includes a selection of a CSG cell from the at least one available CSG cell.

21. The method of claim 17, wherein the input indicates a relative priority between CSG cells and macrocells.

22. A wireless transmit/receive unit (WTRU) comprising:

a processor configured to;

detect at least one available Closed Subscriber Group (CSG) cell;

provide, to a user of the WTRU, a list that includes the at least one available CSG cell; and

receive input, from the user of the WTRU, regarding the at least one available CSG cell included in the list,

wherein the input indicates a relative priority between CSG cells and macrocells.

23. The WTRU of claim 22, wherein the list includes CSG cells of the at least one available CSG cell that are not included on a white list of the WTRU.

24. The WTRU of claim 22, wherein the list includes CSG cells of the at least one available CSG cell that do not satisfy at least one radio-related criteria.

25. The WTRU of claim 22, wherein the input includes a selection of a CSG cell from the at least one available CSG cell.

26. The WTRU of claim 22, wherein the input indicates a priority order of the at least one available CSG cell.