Method and apparatus for sending channel state information using subframe-dependent control channel formats
First Claim
1. A method for wireless communication, comprising:
- identifying a plurality of cells for which to report channel state information (CSI) by a user equipment (UE);
determining a plurality of control channel formats to use to report the CSI for the plurality of cells in a plurality of subframes, wherein the plurality of control channel formats have different capacities and different multiplexing capabilities;
selecting a first control channel format in the plurality of control channel formats when CSI is reported for only one cell;
selecting a second control channel format in the plurality of control channel formats when CSI is reported for at least two cells; and
reporting CSI based on the selected first control channel format or the selected second control channel format.
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Abstract
Techniques for reporting channel state information (CSI) for multiple cells (e.g., carriers) using multiple control channel formats are disclosed. A user equipment (UE) may be configured for operation on a plurality of cells. The UE may be configured to periodically report CSI for the plurality of cells and may also report CSI whenever requested. The UE may be configured with a plurality of control channel formats for sending CSI and possibly other control information in different subframes. The plurality of control channel formats may be associated with at least two different capacities. The UE may report CSI for the plurality of cells in the plurality of subframes based on the plurality of control channel formats.
17 Citations
29 Claims
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1. A method for wireless communication, comprising:
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identifying a plurality of cells for which to report channel state information (CSI) by a user equipment (UE); determining a plurality of control channel formats to use to report the CSI for the plurality of cells in a plurality of subframes, wherein the plurality of control channel formats have different capacities and different multiplexing capabilities; selecting a first control channel format in the plurality of control channel formats when CSI is reported for only one cell; selecting a second control channel format in the plurality of control channel formats when CSI is reported for at least two cells; and reporting CSI based on the selected first control channel format or the selected second control channel format. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for wireless communication, comprising:
- at least one processor configured to;
identify a plurality of cells for which to report channel state information (CSI) by a user equipment (UE); determine a plurality of control channel formats to use to report the CSI for the plurality of cells in a plurality of subframes, wherein the plurality of control channel formats have different capacities and different multiplexing capabilities; select a first control channel format in the plurality of control channel formats when CSI is reported for only one cell; select a second control channel format in the plurality of control channel formats when CSI is reported for at least two cells; and report CSI based on the selected first control channel format or the selected second control channel format; and a memory coupled to the at least one processor. - View Dependent Claims (12, 13, 14)
- at least one processor configured to;
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15. A non-transitory computer-readable medium comprising:
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code for causing at least one computer to identify a plurality of cells for which to report channel state information (C SI) by a user equipment (UE); code for causing the at least one computer to determine a plurality of control channel formats to use to report the CSI for the plurality of cells in a plurality of subframes, wherein the plurality of control channel formats have different capacities and different multiplexing capabilities; code for causing the at least one computer to select a first control channel format in the plurality of control channel formats when CSI is reported for only one cell; code for causing the at least one computer to select a second control channel format in the plurality of control channel formats when CSI is reported for at least two cells; and code for causing the at least one computer to report CSI based on the selected first control channel format or the selected second control channel format.
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16. A method for wireless communication, comprising:
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identifying a plurality of cells for which to receive channel state information (CSI) from a user equipment (UE); determining a plurality of control channel formats used by the UE to send the CSI for the plurality of cells in a plurality of subframes, wherein the plurality of control channel formats have different capacities and different multiplexing capabilities; selecting a first control channel format in the plurality of control channel formats when CSI is reported for only one cell; selecting a second control channel format in the plurality of control channel formats when CSI is reported for at least two cells; and receiving CSI based on the selected first control channel format or the selected second control channel format. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. An apparatus for wireless communication, comprising:
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at least one processor configured to; identify a plurality of cells for which to receive channel state information (CSI) from a user equipment (UE); determine a plurality of control channel formats used by the UE to send the CSI for the plurality of cells in a plurality of subframes, wherein the plurality of control channel formats have different capacities and different multiplexing capabilities; select a first control channel format in the plurality of control channel formats when CSI is reported for only one cell; select a second control channel format in the plurality of control channel formats when CSI is reported for at least two cells; and receive CSI based on the selected first control channel format or the selected second control channel format; and a memory coupled to the at least one processor. - View Dependent Claims (26, 27, 28)
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29. A non-transitory computer-readable medium comprising:
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code for causing at least one computer to identify a plurality of cells for which to receive channel state information (CSI) from a user equipment (UE); code for causing the at least one computer to determine a plurality of control channel formats used by the UE to send the CSI for the plurality of cells in a plurality of subframes, wherein the plurality of control channel formats have different capacities and different multiplexing capabilities; code for causing the at least one computer to select a first control channel format in the plurality of control channel formats when CSI is reported for only one cell; code for causing the at least one computer to select a second control channel format in the plurality of control channel formats when CSI is reported for at least two cells; and code for causing the at least one computer to receive CSI based on the selected first control channel format or the selected second control channel format.
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Specification