Method and apparatus for managing CSG priorities in idle and connected modes

• US 8,804,634 B2
• Filed: 01/10/2011
• Issued: 08/12/2014
• 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: Gomes, Sylvie, Pani, Diana, Marinier, Paul
• Primary Examiner(s): Hailu, Kibrom T
• Assistant Examiner(s): Beyen, Zewdu A
• Application Number:
  US12/987,667
• Publication Number:
  US 20110170481A1
• Time in Patent Office: 1,310 Days
• Field of Search: 370/331, 370/353, 370/354, 455/436, 455/439, 455/442, 455/33.2
• US Class Current: 370/329
• 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 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 a home Node-B (HNB) closed subscriber group (CSG) cell proximity based on an autonomous search function;

generating a CSG whitelist, wherein the whitelist includes information concerning a plurality of HNB CSG cells operating at a plurality of frequencies and a plurality of radio access technologies (RAT);

assigning a priority to each cell included in the CSG whitelist based at least in part on a RAT associated with each cell; and

signaling a message to a network, the message including a proximity indication and the assigned priorities, and the signaling further indicates that the WTRU is entering or leaving the proximity of at least one cell that has a CSG identification (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. The method of claim 1, wherein the plurality of HNB CSG cells includes a Long Term Evolution (LTE) cell.

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

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

circuitry configured to store a CSG whitelist, wherein the whitelist includes information concerning a plurality of HNB CSG cells operating at a plurality of frequencies and a plurality of radio access technologies (RAT);

assigning a CSG priority to each cell includes in the CSG whitelist based at least in part on a RAT associated with each cell; and

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

6. The WTRU of claim 5, wherein the proximity indication is transmitted on a condition that at least one CSG cell has a priority above a predetermined threshold.

7. The WTRU of claim 5, a proximity indication is transmitted for each frequency in which there are CSGs in a predetermined area.

8. The WTRU of claim 5, wherein the plurality of HNB CSG cells includes a Long Term Evolution (LTE) cell.