Cell selection method and mobile station
First Claim
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1. A cell selection method in which a mobile station selects a camped cell among one or more CSG cell(s) selectable as a camped cell only by a specific mobile station and one or more non-CSG cell(s) selectable as a camped cell by any mobile station, wherein the non-CSG cells and CSG cells have a different priority level;
- the mobile station uses a first non-CSG cell as the camped cell;
a first carrier frequency is used by a plurality of cells including a first CSG cell that regards the mobile station as the specific mobile station;
the first carrier frequency is different from a second carrier frequency used in the first non-CSG cell; and
the cell selection method comprising;
changing, at the mobile station, the camped cell from the first non-CSG cell to a first CSG cell, when it is determined that the first CSG cell has best radio quality among cells using the first carrier frequency, when the radio quality of the first CSG cell is greater than a threshold, andchanging, at the mobile station, from the camped cell to another cell having the same priority level, when a sum of radio quality in the first CSG cell and a predetermined offset is larger than a sum of radio quality in the first non-CSG and a predetermined parameter.
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Abstract
A cell selection method includes steps of: (A) determining, at a mobile station (UE), whether or not a first CSG cell satisfies a predetermined condition, when using a first macro cell as a camped cell; and (B) changing, at the mobile station (UE), the camped cell from the first macro cell to a first CSG cell, when determined that the first CSG cell satisfies the predetermined condition.
16 Citations
8 Claims
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1. A cell selection method in which a mobile station selects a camped cell among one or more CSG cell(s) selectable as a camped cell only by a specific mobile station and one or more non-CSG cell(s) selectable as a camped cell by any mobile station, wherein the non-CSG cells and CSG cells have a different priority level;
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the mobile station uses a first non-CSG cell as the camped cell; a first carrier frequency is used by a plurality of cells including a first CSG cell that regards the mobile station as the specific mobile station; the first carrier frequency is different from a second carrier frequency used in the first non-CSG cell; and the cell selection method comprising;
changing, at the mobile station, the camped cell from the first non-CSG cell to a first CSG cell, when it is determined that the first CSG cell has best radio quality among cells using the first carrier frequency, when the radio quality of the first CSG cell is greater than a threshold, andchanging, at the mobile station, from the camped cell to another cell having the same priority level, when a sum of radio quality in the first CSG cell and a predetermined offset is larger than a sum of radio quality in the first non-CSG and a predetermined parameter. - View Dependent Claims (2)
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3. A cell selection method in which a mobile station selects a camped cell among one or more CSG cell(s) selectable as a camped cell only by a specific mobile station and one or more non-CSG cell(s) selectable as a camped cell by any mobile station, wherein
the mobile station uses a first non-CSG cell as the camped cell; -
the non-CSG cells and CSG cells having a different priority level; a first carrier frequency is used by a plurality of cells including a first CSG cell that regards the mobile station as the specific mobile station; the first carrier frequency is different from a second carrier frequency used in the first non-CSG cell; and the cell selection method comprising;
changing, at the mobile station, the camped cell from the first non-CSG cell to a first CSG cell, when it is determined that a difference between radio quality in the first CSG cell and best radio quality among cells using the second carrier frequency is within a predetermined offset, when the radio quality of the first CSG cell is greater than a threshold, andchanging, at the mobile station, from the camped cell to another cell having the same priority level, a sum of radio quality in the first CSG cell and a predetermined offset is larger than a sum of radio quality in the first non-CSG and a predetermined parameter. - View Dependent Claims (4)
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5. A mobile station configured to select a camped cell among one or more CSG cell(s) selectable as a camped cell only by a specific mobile station and one or more non-CSG cell(s) selectable as a camped cell by any mobile station, wherein
the non-CSG cells and CSG cells having a different priority level; -
the mobile station uses a first non-CSG cell as the camped cell; a first carrier frequency is used by a plurality of cells including a first CSG cell that regards the mobile station as the specific mobile station; the first carrier frequency is different from a second carrier frequency used in the first non-CSG cell; and the mobile station comprising;
a processor and a cell selector unit configured to change the camped cell from the first non-CSG cell to a first CSG cell using the processor, when it is determined that the first CSG cell has best radio quality among cells using the first carrier frequency, when the radio quality of the first CSG cell is greater than a threshold, andchanging, at the mobile station, from the camped cell to another cell having the same priority level, when a sum of radio quality in the first CSG cell and a predetermined offset is larger than a sum of radio quality in the first non-CSG and a predetermined parameter. - View Dependent Claims (6)
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7. A mobile station configured to select a camped cell among one or more CSG cell(s) selectable as a camped cell only by a specific mobile station and one or more non-CSG cell(s) selectable as a camped cell by any mobile station, wherein
the non-CSG cells and CSG cells having a different priority level; -
the mobile station uses a first non-CSG cell as the camped cell; a first carrier frequency is used by a plurality of cells including a first CSG cell that regards the mobile station as the specific mobile station; the first carrier frequency is different from a second carrier frequency used in the first non-CSG cell; and the mobile station comprising;
a processor and a cell selector unit configured to change the camped cell from the first non-CSG cell to a first CSG cell using the processor, when it is determined that a difference between radio quality in the first CSG cell and best radio quality among cells using the first carrier frequency is within a predetermined offset, when the radio quality of the first CSG cell is greater than a threshold, andchanging, at the mobile station, from the camped cell to another cell having the same priority level, a sum of radio quality in the first CSG cell and a predetermined offset is larger than a sum of radio quality in the first non-CSG and a predetermined parameter. - View Dependent Claims (8)
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Specification