APPARATUS AND METHOD FOR REDUCING INTER-CELL INTERFERENCE IN MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM
First Claim
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1. A method for operating a Codebook Subset Pattern (CSP) of a Base Station (BS) in a Multiple Input Multiple Output (MIMO) system, the method comprising:
- determining whether there is a CSP-updated BS among the BS and adjacent BSs;
exchanging the updated CSP between cells if it is determined that there is a CSP-updated BS; and
broadcasting the CSP of each cell acquired through the exchange.
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Abstract
An apparatus and method for operating a Codebook Subset Pattern (CSP) of a Base Station (BS) in a Multiple Input Multiple Output (MIMO) system are provided. The method includes determining whether there is a CSP-updated BS among the BS and adjacent BSs, exchanging the updated CSP between cells if it is determined that there is a CSP-updated BS, and broadcasting the CSP of each cell acquired through the exchange thereby reducing an inter-cell interference in the MIMO system
20 Citations
24 Claims
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1. A method for operating a Codebook Subset Pattern (CSP) of a Base Station (BS) in a Multiple Input Multiple Output (MIMO) system, the method comprising:
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determining whether there is a CSP-updated BS among the BS and adjacent BSs; exchanging the updated CSP between cells if it is determined that there is a CSP-updated BS; and broadcasting the CSP of each cell acquired through the exchange. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for operating a Codebook Subset Pattern (CSP) of a Base Station (BS) in a Multiple Input Multiple Output (MIMO) system, the apparatus comprising:
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a CSP updater for determining whether there is a CSP-updated BS among the BS and adjacent BSs; an inter-cell information exchanger for exchanging the updated CSP between cells if it is determined that there is a CSP-updated BS; and a signal transmitter for broadcasting the CSP of each cell acquired through the exchange. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for reporting a Channel Quality Indicator (CQI) of a User Equipment (UE) in a Multiple Input Multiple Output (MIMO) system, the method comprising:
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receiving a Codebook Subset Pattern (CSP) of each of a plurality of cells; receiving a Common Reference Signal (CRS) from each cell; determining a multi-cell CQI based on the received CSP and CRS of each cell; and reporting the determined multi-cell CQI to a Base Station (BS).
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24. An apparatus for reporting a Channel Quality Indicator (CQI) of a User Equipment (UE) in a Multiple Input Multiple Output (MIMO) system, the apparatus comprising:
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a signal receiver for receiving a Codebook Subset Pattern (CSP) of each of a plurality of cells and for receiving a Common Reference Signal (CRS) from each cell; and a feedback information generator for determining a multi-cell CQI based on the received CSP and CRS of each cell and for reporting the determined multi-cell CQI to a Base Station (BS).
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Specification