METHOD AND APPARATUS FOR MANAGING CSG PRIORITIES IN IDLE AND CONNECTED MODES

• US 20110170481A1
• Filed: 01/10/2011
• Published: 07/14/2011
• Est. Priority Date: 01/08/2010
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Marinier, Paul, Pani, Diana, Gomes, Sylvie
• Granted Patent: US 8,804,634 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 36/0058 Transmission of hand-off measurement information, e.g. measurement reports
• CPC Class Codes: H04W 36/00835 Determination of neighbour cell lists
• CPC Class Codes: H04W 36/00837 Determination of triggering parameters for hand-off
• CPC Class Codes: H04W 36/302 due to low signal strength
• 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 comprising detecting closed subscriber group (CSG) proximity based on an autonomous search function; signaling a proximity indication to a network, wherein the proximity indication includes at least one priority of at least one allowed neighbor CSG cell. A method comprising, performing measurements on neighboring CSG cells; and generating a measurement report including measurements of at least one neighboring CSG cell; and transmitting a message including a measurement report and a CSG priority for at least one CSG cell.

Claims

1. A method implemented in a wireless transmit/receive unit (WTRU) operating in connected mode, the method comprising:

detecting closed subscriber group (CSG) proximity based on an autonomous search function;

generating a CSG whitelist; and

signaling a proximity indication to a network, wherein the proximity indication includes at least one priority of at least one allowed neighbor CSG cell and the signaling indicates that the WTRU is entering or leaving the proximity of at least one cell that has a CSG ID included in the CSG whitelist.

2. The method of claim 1, wherein the proximity indication is transmitted on a condition that at least one CSG cell has a priority above a predetermined threshold.

3. The method of claim 1, a proximity indication is transmitted for each frequency in which there are CSGs in a predetermined area.

4. A method implemented in a wireless transmit/receive unit operating in connected mode, the method comprising:

performing measurements on neighboring closed subscriber group (CSG) cells;

generating a measurement report including measurements of at least one neighboring CSG cell; and

transmitting a message including a measurement report and a CSG priority for at least one CSG cell.

5. The method of claim 4, further comprising receiving a command to read the system information (SI) of the CSG cells of a predetermined priority.

6. The method of claim 5, wherein the WTRU only reports the CSG priority for CSG'"'"'s whose SI'"'"'s the WTRU was able to read.

7. The method of claim 4, wherein the measurement reports are sent on a condition there is at least one CSG in the neighborhood with a predetermined priority.

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

circuitry configured to detect CSG proximity based on an autonomous search function;

circuitry configured to store a CSG whitelist; and

circuitry configured to generate a message, the message containing a proximity indication to a network, wherein the proximity indication includes at least one priority of at least one allowed neighbor CSG cell, wherein the message indicates that the WTRU is entering or leaving the proximity of at least one cell that has CSG IDs included in the CSG whitelist.

9. The WTRU of claim 8, wherein the proximity indication is transmitted on a condition that at least one CSG cell has a priority above a predetermined threshold.

10. The WTRU of claim 8, a proximity indication is transmitted for each frequency in which there are CSGs in a predetermined area.

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

circuitry configured to perform measurements on neighboring closed subscriber group (CSG) cells; and

circuitry configured to generate a measurement report including measurements of at least one neighboring CSG cell; and

circuitry configured to transmit a message including a measurement report and a CSG priority for at least one CSG cell.

12. The method of claim 11, further comprising receiving a command to read the system information (SI) of the CSG cells of a predetermined priority.

13. The method of claim 12, wherein the WTRU only reports the CSG priority for CSG'"'"'s whose system information'"'"'s (SI'"'"'s) the WTRU was able to read.

14. The method of claim 11, wherein the measurement reports are sent on a condition there is at least one CSG in the neighborhood with a predetermined priority.