User equipment and methods for codebook subsampling for enhanced 4TX codebooks
First Claim
1. An apparatus of a User Equipment (UE) arranged for channel state information (CSI) reporting using a subsampled four transmit (4TX) antenna codebook, the apparatus comprising:
- memory; and
processing circuitry coupled to the memory, to;
configure the UE for periodic physical uplink control channel (PUCCH) channel-state information (CSI) reporting in accordance with one of a plurality of PUCCH reporting types, the CSI reporting including a rank indicator (RI) and a precoding matrix (W1) that are jointly coded using the subsampled 4TX antenna codebook, the PUCCH reporting types including PUCCH reporting types for four antenna ports,the PUCCH reporting types for four antenna ports including;
a PUCCH reporting type 1a for reporting a subband channel quality indicator (CQI) and a second precoding matrix indicator (PMI),a PUCCH reporting type 2c for reporting a CQI, a first PMI and the second PMI, anda PUCCH reporting type 5 for reporting the RI and the first PMI; and
encode a CSI report for transmission on the PUCCH in accordance with the one of the plurality of PUCCH reporting types,wherein the PUCCH reporting types indicate a CQI report or a PMI report,wherein when the UE is configured for PUCCH reporting type 2c, the processing circuitry is configured to select a single precoding matrix from the subsampled enhanced 4Tx codebook,wherein the CQI is calculated based on the selected single precoding matrix, andwherein the first PMI and the second PMI correspond to the selected single precoding matrix,wherein the memory is configured to store configuration information for the PUCCH reporting types and PUCCH reporting sub-modes, andwherein when the UE is configured to support a maximum 2 layer transmission, there is no subsampling and the RI and the W1 are jointly encoded following Table 1,
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Abstract
Embodiments of user equipment (UE) and methods for codebook subsampling for enhanced 4TX codebooks in 3GPP LTE wireless networks are generally described herein. In some embodiments, a physical uplink control channel (PUCCH) is configured for transmission of channel state information (CSI) feedback including a rank indicator (RI) and a precoding matrix (W1). The rank indicator (RI) and a precoding matrix (W1) are jointly encoded and codebook subsampling is performed for the enhanced 4Tx codebook for at least one of: PUCCH report type 5 (RI/1st PMI) in PUCCH 1-1 submode 1; PUCCH report type 2c (CQI/1st PMI/2nd PMI) in PUCCH 1-1 submode 2; and PUCCH report type 1a (subband CQI/2nd PMI) in PUCCH 2-1.
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Citations
15 Claims
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1. An apparatus of a User Equipment (UE) arranged for channel state information (CSI) reporting using a subsampled four transmit (4TX) antenna codebook, the apparatus comprising:
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memory; and processing circuitry coupled to the memory, to; configure the UE for periodic physical uplink control channel (PUCCH) channel-state information (CSI) reporting in accordance with one of a plurality of PUCCH reporting types, the CSI reporting including a rank indicator (RI) and a precoding matrix (W1) that are jointly coded using the subsampled 4TX antenna codebook, the PUCCH reporting types including PUCCH reporting types for four antenna ports, the PUCCH reporting types for four antenna ports including; a PUCCH reporting type 1a for reporting a subband channel quality indicator (CQI) and a second precoding matrix indicator (PMI), a PUCCH reporting type 2c for reporting a CQI, a first PMI and the second PMI, and a PUCCH reporting type 5 for reporting the RI and the first PMI; and encode a CSI report for transmission on the PUCCH in accordance with the one of the plurality of PUCCH reporting types, wherein the PUCCH reporting types indicate a CQI report or a PMI report, wherein when the UE is configured for PUCCH reporting type 2c, the processing circuitry is configured to select a single precoding matrix from the subsampled enhanced 4Tx codebook, wherein the CQI is calculated based on the selected single precoding matrix, and wherein the first PMI and the second PMI correspond to the selected single precoding matrix, wherein the memory is configured to store configuration information for the PUCCH reporting types and PUCCH reporting sub-modes, and wherein when the UE is configured to support a maximum 2 layer transmission, there is no subsampling and the RI and the W1 are jointly encoded following Table 1, - View Dependent Claims (2, 3, 4, 5)
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6. A non-transitory computer-readable storage medium that stores instructions for execution by processing circuitry of a User Equipment (UE), the UE arranged for channel state information (CSI) reporting using a subsampled four transmit (4TX) antenna codebook, the processing circuitry configured to:
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configure the UE to perform operations for periodic physical uplink control channel (PUCCH) channel-state information (CSI) reporting in accordance with one of a plurality of PUCCH reporting types for four antenna ports, the CSI reporting including a rank indicator (RI) and a precoding matrix (W1) that are jointly precoded using the subsampled 4TX antenna codebook, the PUCCH reporting types including PUCCH reporting types for four antenna ports, wherein the PUCCH reporting types for four antenna ports include; a PUCCH reporting type 1a for reporting a subband channel quality indicator (CQI) and a second precoding matrix indicator (PMI), a PUCCH reporting type 2c for reporting a CQI, a first PMI and the second PMI, and a PUCCH reporting type 5 for reporting the RI and the first PMI; and configure the UE to encode a CSI report for transmission on the PUCCH in accordance with the one of the plurality of PUCCH reporting types, wherein the PUCCH reporting types indicate a CQI report or a PMI report wherein when the UE is configured for PUCCH reporting type 2c, the processing circuitry is configured to select a single precoding matrix from the subsampled 4TX codebook, wherein the CQI is calculated based on the selected single precoding matrix, wherein the first PMI and the second PMI correspond to the selected single precoding matrix, wherein the memory is configured to store configuration information for the PUCCH reporting types and PUCCH reporting sub-modes, and wherein when the UE is configured to support a maximum 2 layer transmission, there is no subsampling and the RI and the W1 are jointly encoded following Table 1, - View Dependent Claims (7, 8, 9, 10)
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11. A method for reporting channel state information (CSI) using a subsampled four transmit 4Tx antenna codebook, performed by a User Equipment (UE), the method comprising:
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configuring the UE to perform operations for periodic physical uplink control channel (PUCCH) channel-state information (CSI) reporting in accordance with one of a plurality of PUCCH reporting types, the CSI reporting including a rank indicator (RI) and a precoding matrix (W1) that are jointly precoded using the subsampled 4TX antenna codebook, the PUCCH reporting types including PUCCH reporting types for four antenna ports, wherein the PUCCH reporting types for four antenna ports include; a PUCCH reporting type 1a for reporting a subband channel quality indicator (CQI) and a second precoding matrix indicator (PMI), a PUCCH reporting type 2c for reporting a CQI, a first PMI and the second PMI, and a PUCCH reporting type 5 for reporting the RI and the first PMI; and encoding a CSI report for transmission on the PUCCH in accordance with the one of the plurality of PUCCH reporting types, wherein the PUCCH reporting types indicate one of a CQI report and a PMI report, wherein UE is configured to store configuration information for the PUCCH reporting types and PUCCH sub-modes wherein when the UE is configured for PUCCH reporting type 2c, the method further comprises configuring the UE to select a single precoding matrix from the subsampled 4TX codebook, wherein the CQI is calculated based on the selected single precoding matrix, wherein the first PMI and the second PMI correspond to the selected single precoding matrix, and for ranks 1 and 2, Table 4-1 or Table 4-2 is used for codebook subsampling - View Dependent Claims (12, 13, 14, 15)
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Specification