Channel Feedback for Coordinated Multi-Point Transmission
AssigneeTexas Instruments Incorporated
InventorsRunhua Chen, Vikram Chandrasekhar, Eko Onggosanusi
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Abstract
A method of Coordinated Multipoint (CoMP) communication between a base station having a plurality of points with at least one user equipment (UE). At least one UE receives at least one transmission from the base station having the plurality of points. This UE measures downlink channel state information for each of the plurality of points including rank indicator (RI), a precoding matrix indicator (PMI) and a channel quality indicator (CQI). This UE transmits the downlink channel state information in an uplink feedback channel to the base station.
Claims31
1-27. (canceled)
A method of operating a user equipment (UE), comprising the steps of:
- configuring the UE to receive multiple channel state information (CSI) reference signals (CSI-RSs) from a cell;
- configuring the UE to compute multiple CSI parameters;
- and
- configuring the UE to transmit feedback to the cell for each of the CSI parameters.
A method of operating a user equipment (UE), comprising the steps of:
- receiving in the UE multiple channel state information (CSI) reference signals (CSI-RSs) from a cell;
- computing in the UE multiple CSI parameters;
- and
- transmitting from the UE feedback to the cell for each of the CSI parameters.
A method of operating a user equipment (UE), comprising the steps of:
- configuring the UE to receive multiple channel state information (CSI) reference signal (CSI-RSs) from a cell;
- receiving in the UE multiple channel state information (CSI) reference signal (CSI-RSs) from a cell;
- configuring the UE to compute the multiple CSI reference parameters;
- computing in the UE multiple CSI parameters;
- configuring the UE to transmit feedback to the cell for each of the CSI parameters;
- and
- transmitting from the UE feedback to the cell for each of the CSI parameters.
A method of operating a user equipment (UE), comprising the steps of:
- configuring the UE to receive multiple channel state information (CSI) reference signals (CSI-RSs);
- configuring the UE with multiple CSI processes associated with the multiple CSI-RSs wherein at least one of the CSI processes is configured without precoding matrix indicator/rank indicator (PMI/RI) reporting by higher layer signaling;
- and
- configuring the UE to transmit feedback of each of the CSI signals.
A method of operating a user equipment (UE), comprising the steps of:
- receiving at the UE multiple channel state information (CSI) reference signals (CSI-RSs);
- configuring the UE with multiple CSI processes associated with the multiple CSI-RSs wherein at least one of the CSI processes is configured without precoding matrix indicator/rank indicator (PMI/RI) reporting by higher layer signaling;
- and
- transmitting from the UE feedback for each of the CSI signals.
A method of operating a user equipment (UE), comprising the steps of:
- configuring the UE to receive multiple channel state information (CSI) reference signals (CSI-RSs);
- receiving at the UE the multiple channel state information (CSI) reference signals (CSI-RSs);
- configuring the UE with multiple CSI processes associated with the multiple CSI-RSs wherein at least one of the CSI processes is configured without precoding matrix indicator/rank indicator (PMI/RI) reporting by higher layer signaling;
- configuring the UE to transmit feedback for each of the CSI signals;
- and
- transmitting from the UE feedback for each of the CSI signals.
Dependencies are inferred from the claim text.