METHOD AND APPARATUS FOR DETECTING CLOSED SUBSCRIBER GROUP CELLS
First Claim
1. A method implemented by a wireless transmit/receive unit (WTRU) for detecting closed subscriber group (CSG) cells, the method comprising:
- receiving, at a receiver in the WTRU, system information that indicates at least one physical layer cell identity (PCID) reserved for a CSG cell;
storing the system information in a memory of the WTRU; and
determining, at a processor in the WTRU, that a detected cell is a CSG cell on a condition that the detected cell has a PCID reserved for a CSG cell that is included in the stored system information.
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Accused Products
Abstract
A method and a wireless transmit/receive unit (WTRU), including a universal subscriber identity module (USIM), for identifying, detecting and accessing a closed subscriber group (CSG) cell are disclosed. The WTRU receives a broadcast from a cell including a cell identifier (ID). If the cell ID is associated with a CSG cell, the WTRU determines whether the CSG ID is programmed in the USIM. The cell broadcast may include a single bit information element (IE) indicating that the cell is a CSG cell. The cell broadcast may further include a bit indicating whether the CSG cell is public or private. Different detection and access methods are also provided for detecting public and private CSG cells. Mobility detection methods for the WTRU in the CSG cell are also provided.
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Citations
24 Claims
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1. A method implemented by a wireless transmit/receive unit (WTRU) for detecting closed subscriber group (CSG) cells, the method comprising:
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receiving, at a receiver in the WTRU, system information that indicates at least one physical layer cell identity (PCID) reserved for a CSG cell; storing the system information in a memory of the WTRU; and determining, at a processor in the WTRU, that a detected cell is a CSG cell on a condition that the detected cell has a PCID reserved for a CSG cell that is included in the stored system information. - View Dependent Claims (2, 3)
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4. A method implemented by a wireless transmit/receive unit (WTRU) for detecting closed subscriber group (CSG) cells, the method comprising:
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receiving, at a receiver in the WTRU, system information that indicates at least one scrambling code reserved for a CSG cell; storing the system information in a memory of the WTRU; and determining, at a processor in the WTRU, that a detected cell is a CSG cell on a condition that the detected cell has a scrambling code reserved for a CSG cell that is included in the stored system information. - View Dependent Claims (5, 6)
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7. A method implemented by a wireless transmit/receive unit (WTRU) for detecting closed subscriber group (CSG) cells, the method comprising:
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receiving, at a receiver in the WTRU, system information that indicates at least one frequency associated with a CSG cell; storing the system information in a memory of the WTRU; and determining, at a processor in the WTRU, that a detected cell is a CSG cell on a condition that the detected cell communicates over a frequency associated with a CSG cell that is included in the stored system information. - View Dependent Claims (8, 9)
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10. A method implemented by a wireless transmit/receive unit (WTRU) for detecting closed subscriber group (CSG) cells, the method comprising:
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receiving, at a receiver in the WTRU, system information that indicates whether or not a detected cell is a public CSG cell; checking a CSG white-list stored in the WTRU on a condition that the detected cell is determined not to be a public CSG cell, and the CSG white-list is not checked on a condition that the detected cell is determined to be a public CSG cell.
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11. A method implemented by a wireless transmit/receive unit (WTRU) for adjusting mobility parameters associated with a closed subscriber group (CSG) cell, the method comprising:
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determining, at a processor in the WTRU, whether or not a detected cell is a CSG cell; and the processor modifying mobility parameters stored in a memory on a condition that the detected cell is a CSG cell. - View Dependent Claims (12)
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13. A wireless transmit/receive unit (WTRU) for detecting closed subscriber group (CSG) cells, the WTRU comprising:
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a receiver configured to receive system information that indicates at least one physical layer cell identity (PCID) reserved for a CSG cell; and a processor including a memory, the processor configured to store the system information in the memory, and determine that a detected cell is a CSG cell on a condition that the detected cell has a PCID reserved for a CSG cell that is included in the stored system information. - View Dependent Claims (14, 15)
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16. A wireless transmit/receive unit (WTRU) for detecting closed subscriber group (CSG) cells, the WTRU comprising:
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a receiver configured to receive system information that indicates at least one scrambling code reserved for a CSG cell; and a processor including a memory, the processor configured to store the system information in the memory, and determine that a detected cell is a CSG cell on a condition that the detected cell has a scrambling code reserved for a CSG cell that is included in the stored system information. - View Dependent Claims (17, 18)
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19. A wireless transmit/receive unit (WTRU) for detecting closed subscriber group (CSG) cells, the WTRU comprising:
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a receiver configured to receive system information that indicates at least one frequency associated with a CSG cell; and a processor including a memory, the processor configured to store the system information in the memory, and determine that a detected cell is a CSG cell on a condition that the detected cell communicates over a frequency associated with a CSG cell that is included in the stored system information. - View Dependent Claims (20, 21)
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22. A wireless transmit/receive unit (WTRU) for detecting closed subscriber group (CSG) cells, the WTRU comprising:
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a receiver configured to receive system information that indicates whether or not a detected cell is a public CSG cell; a universal subscriber identity module (USIM) configured to store a CSG white-list; and a processor configured to check the CSG white-list on a condition that the detected cell is determined not to be a public CSG cell, and the CSG white-list is not checked by the processor on a condition that the detected cell is determined to be a public CSG cell.
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23. A wireless transmit/receive unit (WTRU) for adjusting mobility parameters associated with a closed subscriber group (CSG) cell, the WTRU comprising:
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a memory configured to store mobility parameters; and a processor configured to determine whether or not a detected cell is a CSG cell, and modify mobility parameters stored in the memory on a condition that the detected cell is a CSG cell. - View Dependent Claims (24)
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Specification