System and method for dynamic inter-cell interference coordination
First Claim
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1. A method for assigning high power frequency bands in a communication system, comprising:
- generating, in a cell controller having a processor, a strong interference neighbor relationship table (SI-NRT) for a cell based on a predefined threshold value and interferences from a plurality of neighbor cells, wherein the interferences are based on interference measurement reports of all users in the cell and all users in the plurality of neighbor cells;
determining, in the cell controller, whether the cell needs an additional high power frequency band based on a ratio of traffic loads between cell edge users (CEUs) and cell center users (CCUs);
dynamically allocating, in the cell controller, a high power frequency band to the cell in accordance with the following conditions being satisfied;
the cell needs the high power frequency band, andthe high power frequency band is assigned to, but is not used by, any of the plurality of neighbor cells, and the high power frequency band is not used by any cell whose SI-NRT includes the cell,wherein one color of a six-color fractional frequency reuse is dynamically allocated to the cell, and wherein two colors of the six-color fractional frequency reuse are dynamically allocated to one of the plurality of neighbor cells, in accordance with the interference measurement reports and traffic loads of the cell and the plurality of neighbor cells.
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Abstract
A system including a cell controller and a method for dynamic inter-cell interference coordination based on a strong interference neighbor relationship table (SI-NRT) are provided. In the method, the cell controller generates a SI-NRT based on a predefined threshold value and interferences from a plurality of neighbor cells. The cell controller determines whether a cell needs additional high power frequency band and determines whether there is available high power frequency band in the plurality of neighboring cells based on the SI-NRT.
29 Citations
20 Claims
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1. A method for assigning high power frequency bands in a communication system, comprising:
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generating, in a cell controller having a processor, a strong interference neighbor relationship table (SI-NRT) for a cell based on a predefined threshold value and interferences from a plurality of neighbor cells, wherein the interferences are based on interference measurement reports of all users in the cell and all users in the plurality of neighbor cells; determining, in the cell controller, whether the cell needs an additional high power frequency band based on a ratio of traffic loads between cell edge users (CEUs) and cell center users (CCUs); dynamically allocating, in the cell controller, a high power frequency band to the cell in accordance with the following conditions being satisfied; the cell needs the high power frequency band, and the high power frequency band is assigned to, but is not used by, any of the plurality of neighbor cells, and the high power frequency band is not used by any cell whose SI-NRT includes the cell, wherein one color of a six-color fractional frequency reuse is dynamically allocated to the cell, and wherein two colors of the six-color fractional frequency reuse are dynamically allocated to one of the plurality of neighbor cells, in accordance with the interference measurement reports and traffic loads of the cell and the plurality of neighbor cells. - View Dependent Claims (2, 3, 4, 5, 6, 19, 20)
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7. A cell controller, comprising:
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a processor coupled with a non-transient storage medium;
the non-transient storage medium storing a set of instructions for assigning high power frequency bands in a communication system, the set of instructions to direct the processor to perform acts of;generating a strong interference neighbor relationship table (SI-NRT) for a cell based on a predefined threshold value and interferences from a plurality of neighbor cells, wherein the interferences are based on interference measurement reports of all users in the cell and all users in the plurality of neighbor cells; determining whether the cell needs additional high power frequency band based on a ratio of traffic loads between cell edge users (CEUs) and cell edge users (CCUs); dynamically allocating a high power frequency band to the cell in accordance with the following conditions being satisfied; the cell needs the high power frequency band, and the high power frequency band is assigned to, but is not used by, any of the plurality of neighbor cells, and the high power frequency band is not used by any cell whose SI-NRT includes the cell, wherein one color of a six-color fractional frequency reuse is dynamically allocated to the cell, and wherein two colors of the six-color fractional frequency reuse are dynamically allocated to one of the plurality of neighbor cells, in accordance with the interference measurement reports and traffic loads of the cell and the plurality of neighbor cells. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A communication system, comprising:
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a plurality of cells communicating with each other, each cell of the plurality of cells comprising a cell controller having a processor configured for; generating a strong interference neighbor relationship table (SI-NRT) for the each cell based on a predefined threshold value and interferences from a plurality of neighbor cells, wherein the interferences are based on interference measurement reports of all users in the cell and all users in the plurality of neighbor cells; determining whether the each cell needs an additional high power frequency band allocated among one of the plurality of neighbor cells based on a ratio of traffic loads between cell edge users (CEUs) and cell center users (CCUs); determining whether there is available a high power frequency band in the plurality of neighbor cells based on the SI-NRT; dynamically allocating an available high power frequency band to the each cell that is also allocated to, but not used by, one of the plurality of neighbor cells, wherein one color of a six-color fractional frequency reuse is dynamically allocated to one of the plurality of the cells, and two colors of the six-color fractional frequency reuse another one of the plurality of cells, in accordance with the interference measurement reports and traffic loads of the plurality of cells. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification