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US 11,909,466 B2Granted
Channel state information feedback in wireless communication
AssigneeZte Corporation
InventorsHao Wu, Yong Li, Guozeng Zheng, Zhaohua Lu, Yu Ngok Li
Life of this patent
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Abstract
Methods, systems, and devices for reducing channel state information feedback channel overhead by compressing coefficients of precoding vectors and reporting a subset of the compressed coefficients based on several parameters including network-signaled parameters. Some embodiments may be used in wireless communication embodiments in which channel state information from many layers and many frequency domain units need to be reported.
Claims24
A method for wireless communication, comprising:
- generating, by a wireless device, a channel state information (CSI) feedback report,
- wherein a first part of the CSI feedback report includes a channel quality indicator (CQI), a rank indicator (RI), and an indication of a number of non-zero coefficients across a plurality of layers,
- wherein a second part of the CSI feedback report includes a precoding matrix indicator (PMI) determined based on a first plurality of L basis vectors, a second plurality of M basis vectors, and a number of non-zero coefficients for each layer of the plurality of layers, wherein the number of non-zero coefficients for each layer is smaller than or equal to K0 non-zero coefficients, wherein K0 is determined based on at least one of L or M, wherein L, M, and K0 are integers;
- and
- transmitting, by the wireless device, the CSI feedback report to a wireless node.
2 more elements
A method for wireless communication, comprising:
- receiving, by a wireless node, a channel state information (CSI) feedback report from a wireless device,
- wherein a first part of the CSI feedback report includes a channel quality indicator (CQI), a rank indicator (RI), and an indication of a number of non-zero coefficients across a plurality of layers,
- wherein a second part of the CSI feedback report includes a precoding matrix indicator (PMI) determined based on a first plurality of L basis vectors, a second plurality of M basis vectors, and a number of non-zero coefficients for each layer of the plurality of layers, wherein the number of non-zero coefficients for each layer is smaller than or equal to K0 non-zero coefficients, wherein K0 is determined based on at least one of L or M, and wherein L, M, and K0 are integers.
A device for wireless communication, comprising a processor configured to:
- generate a channel state information (CSI) feedback report,
- wherein a first part of the CSI feedback report includes a channel quality indicator (CQI), a rank indicator (RI), and an indication of a number of non-zero coefficients across a plurality of layers;
- wherein a second part of the CSI feedback report includes a precoding matrix indicator (PMI) indicating a precoding matrix determined based on a first plurality of L basis vectors, a second plurality of M basis vectors, and a number of non-zero coefficients for each layer of the plurality of layers, wherein the number of non-zero coefficients for each layer is smaller than or equal to K0 non-zero coefficients, wherein K0 is determined based on at least one of L or M, wherein L, M, and K0 are integers;
- and
- transmit the CSI feedback report to a wireless node.
2 more elements
A device for wireless communication, comprising a processor configured to:
- receive a channel state information (CSI) feedback report from a wireless device,
- wherein a first part of the CSI feedback report includes a channel quality indicator (CQI), a rank indicator (RI), and an indication of a number of non-zero coefficients across a plurality of layers, and
- wherein a second part of the CSI feedback report includes a precoding matrix indicator (PMI) indicating a precoding matrix determined based on a first plurality of L basis vectors, a second plurality of M basis vectors, and a number of non-zero coefficients for each layer of the plurality of layers, wherein the number of non-zero coefficients for each layer is smaller than or equal to K0 non-zero coefficients, wherein K0 is determined based on at least one of L or M, and wherein L, M, and K0 are integers.
Dependencies are inferred from the claim text.