Method and apparatus for adding CSG identities to a white list in connected mode

• US 10,165,481 B2
• Filed: 09/02/2016
• Issued: 12/25/2018
• 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, Comsa, Virgil, Watfa, Mahmoud, Olvera-Hernandez, Ulises, Adjakple, Pascal M., Mladin, Catalina M.
• Primary Examiner(s): West, Lewis
• Application Number:
  US15/255,285
• Publication Number:
  US 20160373974A1
• Time in Patent Office: 844 Days
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/0061 of neighbour cell information
• CPC Class Codes: H04W 36/36 by user or terminal equipment
• CPC Class Codes: H04W 36/362 Conditional handover

Abstract

A serving eNodeB and a method thereof are provided. The serving eNodeB includes a receiver configured to receive, from a wireless transmit/receive unit (WTRU), a first measurement report including a physical layer cell identity (PCI) of a target closed subscriber group (CSG) cell detected by the WTRU, a transmitter configured to, in response to the received first measurement report, to transmit a message to the WTRU indicating that the WTRU is to read system information (SI) of the target CSG cell, and a processor. The receiver is further configured to, in response to a transmission of the message, receive a second measurement report for the target CSG cell including information read from the SI, and the processor is configured to, in response to receipt of the second measurement report, add the target CSG cell to a cell list and initiate a handover of the WTRU to the target CSG cell.

Claims

1. A serving base station configured to serve a wireless transmit/receive unit (WTRU), the serving base station comprising:

a transmitter configured to transmit an indication, to a WTRU, that the WTRU is in an area that potentially contains at least one closed subscriber group (CSG) cell to which the WTRU is allowed to connect;

a receiver configured to receive, from the WTRU in response to the transmitted indication, a first measurement report including a physical layer cell identity (PCI) of a target CSG cell detected by the WTRU;

the transmitter further configured to transmit, in response to the received first measurement report, a message to the WTRU indicating that the WTRU is to read system information (SI) of the target CSG cell;

the receiver further configured to receive, in response to the transmitted message, a second measurement report for the target CSG cell including information read from the SI; and

a processor configured to initiate, in response to the received second measurement report, a handover of the WTRU to the target CSG cell.

2. The serving base station of claim 1, wherein the first measurement report includes information from a scan of all frequencies in supported bands.

3. The serving base station of claim 1, wherein the first measurement report includes information from a scan of CSG dedicated frequencies.

4. The serving base station of claim 1, wherein the first measurement report includes information from a scan of frequencies provided to the WTRU by the serving base station.

5. The serving base station of claim 1, wherein the first measurement report indicates that the PCI is an unvisited PCI.

6. The serving base station of claim 1, wherein the second measurement report is included in a radio resource control (RRC) message.

7. The serving base station of claim 1, wherein the indication includes configuration information that includes at least one identifier associated with the at least one CSG cell.

8. The serving base station of claim 1, wherein:

the receiver is further configured to receive, from the WTRU, a capability indication indicating that the WTRU is configured to connect to CSG cells, and

in response the received capability indicator, the transmitter is configured to transmit the indication, to the WTRU, that the WTRU is in the area that potentially contains the at least one CSG cell.

9. The serving base station of claim 1, wherein the indication indicates that the at least one CSG cell is potentially proximate to the WTRU based on a location of the WTRU.

10. A method implemented in a serving base station configured to serve a wireless transmit/receive unit (WTRU), the method comprising:

transmitting an indication, to the WTRU, that the WTRU is in an area that potentially contains at least one closed subscriber group (CSG) cell to which the WTRU is allowed to connect;

receiving, from the WTRU in response to the transmitted indication, a first measurement report including a physical layer cell identity (PCI) of a target CSG cell detected by the WTRU;

transmitting, in response to the received first measurement report, a message to the WTRU indicating that the WTRU is to read system information (SI) of the target CSG cell;

receiving, in response to the transmitted message, a second measurement report for the target CSG cell including information read from the SI; and

initiating a handover of the WTRU to the target CSG cell.

11. The method of claim 10, wherein the first measurement report includes information from a scan of all frequencies in supported bands.

12. The method of claim 10, wherein the first measurement report includes information from a scan of CSG dedicated frequencies.

13. The method of claim 10, wherein the first measurement report includes information from a scan of frequencies provided to the WTRU by the serving base station.

14. The method of claim 10, wherein the first measurement report indicates that the PCI is an unvisited PCI.

15. The method of claim 10, wherein the second measurement report is included in a radio resource control (RRC) message.

16. The method of claim 10, wherein the indication includes configuration information that includes at least one identifier associated with the at least one CSG cell.

17. The method of claim 10, further comprising:

receiving a capability indication, from the WTRU, indicating that the WTRU is configured to connect to CSG cells, and

in response the received capability indicator, transmitting the indication, to the WTRU, that the WTRU is in the area that potentially contains the at least one CSG cell.

18. The method of claim 10, wherein the indication indicates that the at least one CSG cell is potentially proximate to the WTRU based on a location of the WTRU.

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

a receiver configured to receive an indication, from a serving base station, that the WTRU is in an area that potentially contains at least one closed subscriber group (CSG) cell to which the WTRU is allowed to connect;

a transmitter configured to transmit, in response to the received indication, a first measurement report including a physical layer cell identity (PCI) of a potential CSG cell to the serving base station;

the receiver further configured to receive, in response to the transmitted first measurement report, a message from the serving base station indicating that the WTRU is to acquire system information (SI) of the potential CSG cell;

at least one processor configured to read information from the acquired SI; and

the transmitter further configured to transmit, in response to the received message, a second measurement report for the potential CSG cell including the information read from the acquired SI.

20. The WTRU of claim 19, wherein the receiver further is configured to start, in response to a network triggered event, searching for the at least one CSG cell.