Method and apparatus for generating feedback in a communication system
First Claim
1. A method for reporting channel status by a user equipment (UE) in a communication system, the method comprising:
- receiving information for a plurality of channel status information (CSI)-reference signals (RSs), the plurality of CSI-RSs including at least one CSI RS for channel measurement and at least one power off CSI RS;
reporting, to an evolved node B, a first feedback for a cell based on a first set among the plurality of CSI-RSs, the first feedback including at least one of a precoding matrix indicator (PMI), a channel quality indicator (CQI), and a ranking indication (RI); and
reporting, to the evolved node B, a second feedback for the cell based on a second set among the plurality of CSI-RSs, the second feedback including at least one of a PMI, a CQI, and an RI,wherein at least one of the first set and the second set includes the at least one CSI RS for channel measurement and the at least one power off CSI RS, andwherein the RI of the second feedback is same as the RI of the first feedback.
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Abstract
Methods and apparatuses are provided for reporting channel status by a user equipment (UE) in a communication system. Information on at least one channel status information reference signal is received from an evolved node B. A first channel status based on a first period and a first set of the at least one channel status information reference signal, is reported to the evolved node B. A second channel status based on a second period and a second set of the at least one channel status information reference signal, is reported to the evolved node B. The first channel status includes at least one of a precoding matrix indicator (PMI), a channel quality indicator (CQI), and a ranking indication (RI), and the second channel status includes at least one of a CQI, a PMI and a RI. The RI of the second channel status is same as the RI of the first channel status.
64 Citations
12 Claims
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1. A method for reporting channel status by a user equipment (UE) in a communication system, the method comprising:
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receiving information for a plurality of channel status information (CSI)-reference signals (RSs), the plurality of CSI-RSs including at least one CSI RS for channel measurement and at least one power off CSI RS; reporting, to an evolved node B, a first feedback for a cell based on a first set among the plurality of CSI-RSs, the first feedback including at least one of a precoding matrix indicator (PMI), a channel quality indicator (CQI), and a ranking indication (RI); and reporting, to the evolved node B, a second feedback for the cell based on a second set among the plurality of CSI-RSs, the second feedback including at least one of a PMI, a CQI, and an RI, wherein at least one of the first set and the second set includes the at least one CSI RS for channel measurement and the at least one power off CSI RS, and wherein the RI of the second feedback is same as the RI of the first feedback. - View Dependent Claims (2, 3)
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4. A method for receiving channel status by an evolved node B in a communication system, the method comprising:
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transmitting information for a plurality of channel status information (CSI)-reference signals (RSs), the plurality of CSI-RSs including at least one CSI RS for channel measurement and at least one power off CSI RS; receiving, from a user equipment (UE), a first feedback for a cell based on a first set among the plurality of CSI-RSs, the first feedback including at least one of a precoding matrix indicator (PMI), a channel quality indicator (CQI), and a ranking indication (RI); and receiving, from the UE, a second feedback for the cell based on a second set among the plurality of CSI-RSs, the second feedback including at least one of a PMI, a CQI, and an RI, wherein at least one of the first set and the second set includes the at least one CSI RS for channel measurement and the at least one power off CSI RS, and wherein the RI of the second feedback is same as the RI of the first feedback. - View Dependent Claims (5, 6)
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7. A user equipment (UE) for reporting channel status in a communication system, the UE comprising:
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a transmitter; a receiver; and a controller configured to; control the receiver to receive information for a plurality of channel status information (CSI)-reference signals (RSs), the plurality of CSI-RSs including at least one CSI RS for channel measurement and at least one power off CSI RS, and control the transmitter to; report, to an evolved node B, a first feedback for a cell based on a first set among the plurality of CSI-RSs, the first feedback including at least one of a precoding matrix indicator (PMI), a channel quality indicator (CQI), and a ranking indication (RI), and report, to the evolved node B, a second feedback for the cell based on a second set among the plurality of CSI-RSs, the second feedback including at least one of a PMI, a CQI, and an RI, wherein at least one of the first set and the second set includes the at least one CSI RS for channel measurement and the at least one power off CSI RS, and wherein the RI of the second feedback is same as the RI of the first feedback. - View Dependent Claims (8, 9)
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10. An evolved node B for receiving channel status in a communication system, the evolved node B comprising:
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a transmitter; a receiver; and a controller configured to; control the transmitter to transmit information for a plurality of channel status information (CSI)-reference signals (RSs), the plurality of CSI-RSs including at least one CSI RS for channel measurement and at least one power off CSI RS, and control the receiver to; receive, from a user equipment (UE), a first feedback for a cell based on a first set among the plurality of CSI-RSs, the first feedback including at least one of a precoding matrix indicator (PMI), a channel quality indicator (CQI), and a ranking indication (RI), and receive, from the UE, a second feedback for the cell based on a second set among the plurality of CSI-RSs, the second feedback including at least one of a PMI, a CQI, and an RI, wherein at least one of the first set and the second set includes the at least one CSI RS for channel measurement and the at least one power off CSI RS, and wherein the RI of the second feedback is same as the RI of the first feedback. - View Dependent Claims (11, 12)
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Specification