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US 11,381,289 B2Granted
Codebook subset restriction design for MIMO
AssigneeQUALCOMM Incorporated
InventorsLiangming Wu, Yu Zhang, Chenxi Hao, Chao Wei, Wanshi Chen, Hao Xu
Life of this patent
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Abstract
Aspects of the present disclosure relate to techniques for codebook subset restriction (CSR). In some cases, a user equipment (UE) receives, from a network entity, codebook subset restriction (CSR) information. The UE determines, based on the CSR information, a restricted beam set for a plurality of antenna panels, determines precoding matrix indicator (PMI) feedback for the antenna panels subject to restricted beam set, and provides the PMI feedback to the network entity.
Claims25
A method for wireless communications by a user equipment (UE), comprising:
- receiving, from a network entity, codebook subset restriction (CSR) information, wherein a multi-bit restricted interpanel cophase value is provided in the CSR information for each panel of a plurality of antenna panels;
- determining, based on the CSR information, a restricted beam set for the plurality of antenna panels;
- determining precoding matrix indicator (PMI) feedback for the antenna panels subject to restricted beam set, wherein determining the PMI feedback comprises excluding, from the PMI feedback, PMI that includes both a restricted beam and a restricted cophase;
- and
- providing the PMI feedback to the network entity.
2 more elements
A method for wireless communications by a user equipment (UE), comprising:
- receiving, from a network entity, codebook subset restriction (CSR) information indicating which beams or phases the UE is restricted from using when reporting precoding matrix indicator (PMI) feedback for a rank greater than two and at least a threshold number of antenna ports;
- determining the PMI feedback subject to the restriction indicated by the CSR information, wherein determining the PMI feedback comprises determining which beams or phases the UE is restricted from using when reporting the PMI feedback for the rank greater than two and the at least the threshold number of antenna ports based on beam restrictions indicated in the CSR information for a rank of two or less or a rank greater than two and less than the threshold number of antenna ports;
- and
- providing the PMI feedback to the network entity.
1 more element
A method for wireless communications by a network entity, comprising:
- transmitting, to a user equipment (UE), codebook subset restriction (CSR) information indicating a restricted beam set for a plurality of antenna panels, wherein a multi-bit restricted interpanel cophase value is provided in the CSR information for each panel of the plurality of antenna panels;
- and
- receiving, from the UE, precoding matrix indicator (PMI) feedback for the antenna panels subject to restricted beam set, wherein PMI that includes both a restricted beam and a restricted cophase are restricted from the PMI feedback.
A method for wireless communications by a network entity, comprising:
- transmitting, to a user equipment (UE), codebook subset restriction (CSR) information indicating which beams or phases the UE is restricted from using when reporting precoding matrix indicator (PMI) feedback for a rank greater than two and at least a threshold number of antenna ports, wherein the CSR information includes beam restrictions for a rank of two or less or a rank greater than two and less than the threshold number of antenna ports;
- and
- receiving, from the UE, PMI feedback subject to the restriction indicated by the CSR information, wherein the PMI feedback for the rank greater than two and at least the threshold number of antenna ports is based on the beam restrictions for the rank of two or less or the rank greater than two and less than the threshold number of antenna ports.
An apparatus for wireless communications by a user equipment (UE), comprising:
- means for receiving, from a network entity, codebook subset restriction (CSR) information, wherein a multi-bit restricted interpanel cophase value is provided in the CSR information for each panel of a plurality of antenna panels;
- means for determining, based on the CSR information, a restricted beam set for the plurality of antenna panels;
- means for determining precoding matrix indicator (PMI) feedback for the antenna panels subject to restricted beam set, wherein the means for determining the PMI feedback comprise means for excluding, from the PMI feedback, PMI that includes both a restricted beam and a restricted cophase;
- and
- means for providing the PMI feedback to the network entity.
2 more elements
An apparatus for wireless communications by a user equipment (UE), comprising:
- means for receiving, from a network entity, codebook subset restriction (CSR) information indicating which beams or phases the UE is restricted from using when reporting precoding matrix indicator (PMI) feedback for a rank greater than two and at least a threshold number of antenna ports;
- means for determining PMI feedback subject to the restriction indicated by the CSR information, wherein the means for determining the PMI feedback comprises means for determining which beams or phases the UE is restricted from using when reporting the PMI feedback for the rank greater than two and the at least the threshold number of antenna ports based on beam restrictions indicated in the CSR information for a rank of two or less or a rank greater than two and less than the threshold number of antenna ports;
- and
- means for providing the PMI feedback to the network entity.
1 more element
An apparatus for wireless communications by a network entity, comprising:
- means for transmitting, to a user equipment (UE), codebook subset restriction (CSR) information indicating a restricted beam set for a plurality of antenna panels, wherein a multi-bit restricted interpanel cophase value is provided in the CSR information for each panel of the plurality of antenna panels;
- and
- means for receiving, from the UE, precoding matrix indicator (PMI) feedback for the antenna panels subject to restricted beam set, wherein PMI that includes both a restricted beam and a restricted cophase are restricted from the PMI feedback.
An apparatus for wireless communications by a network entity, comprising:
- means for transmitting, to a user equipment (UE), codebook subset restriction (CSR) information indicating which beams or phases the UE is restricted from using when reporting a precoding matrix indicator (PMI) for a rank greater than two and at least a threshold number of antenna ports, wherein the CSR information includes beam restrictions for a rank of two or less or a rank greater than two and less than the threshold number of antenna ports;
- and
- means for receiving, from the UE, PMI feedback subject to the restriction indicated by the CSR information, wherein the PMI feedback for the rank greater than two and at least the threshold number of antenna ports is based on the beam restrictions for the rank of two or less or the rank greater than two and less than the threshold number of antenna ports.
Dependencies are inferred from the claim text.