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A channel state information csi feedback method, terminal and base station

A channel state information, terminal technology, applied in the field of communication

Active Publication Date: 2021-03-02
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a channel state information CSI feedback method, a terminal and a base station to solve the technical problem in the prior art that there is no effective solution for how to report the second part of CSI

Method used

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  • A channel state information csi feedback method, terminal and base station
  • A channel state information csi feedback method, terminal and base station
  • A channel state information csi feedback method, terminal and base station

Examples

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Embodiment 1

[0088] See figure 2 , an embodiment of the present invention provides a channel state information (CSI) feedback method, which can be applied to a terminal, wherein the process of the method can be described as follows.

[0089] S201: The terminal determines S subbands from the N subbands based on the first preset criterion; wherein, the first preset criterion is used to indicate the distribution of the S subbands among the N subbands, and the N subbands are channel quality indicators to be calculated CQI The subband of , N is an integer greater than or equal to 1, and S is less than or equal to N;

[0090] S202: The terminal determines the CSI to be fed back; wherein, the CSI to be fed back is divided into a first part of CSI and a second part of CSI, the first part of CSI includes the CQI of each of the N subbands, and the second part of the CSI includes S subbands of the N subbands The precoding matrix for each subband in indicates the PMI;

[0091] S203: The terminal fe...

Embodiment 2

[0147] See Figure 5 , the embodiment of the present invention provides another channel state information CSI feedback method, which can be applied to the base station, and the process of the method can be described as follows:

[0148] S501: The base station receives the CSI fed back by the terminal; wherein, the CSI is divided into a first part of CSI and a second part of CSI, the first part of CSI includes the CQI of each subband in the N subbands, and the second part of CSI includes the CSI in the S subbands of the N subbands The precoding matrix of each subband indicates PMI, N is an integer greater than or equal to 1, and S is less than or equal to N;

[0149] S502: The base station determines the PMI of each subband in the N-S subbands based on the CSI and the second preset criterion;

[0150] S503: The base station performs resource scheduling based on the PMI and CQI of each subband in the N subbands.

[0151] In S502, the second preset criterion may indicate a mann...

Embodiment 3

[0173] See Figure 6 , an embodiment of the present invention provides a terminal, the terminal includes:

[0174] The first determining module 61 is configured to determine S subbands from the N subbands based on a first preset criterion; wherein the first preset criterion is used to indicate the distribution of the S subbands among the N subbands , the N subbands are the subbands for which the channel quality indicator CQI is to be calculated, the N is an integer greater than or equal to 1, and the S is less than or equal to the N;

[0175] The second determining module 62 is configured to determine the CSI to be fed back; wherein, the CSI to be fed back is divided into a first part of CSI and a second part of CSI, and the first part of CSI includes the CQI of each subband in the N subbands, so The second part of CSI includes a precoding matrix indicator PMI for each subband in the S subbands of the N subbands;

[0176] The feedback module 63 is configured to feed back the...

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Abstract

Embodiments of the present invention provide a channel state information CSI feedback method, a terminal and a base station to solve the technical problem in the prior art that there is no effective solution for how to report the second part of CSI. Wherein, the method includes that the terminal determines S subbands from N subbands based on a first preset criterion; wherein, the first preset criterion is used to indicate the distribution of S subbands in N subbands, and N subbands are channel quality to be calculated Indicate the subband of CQI, N is an integer greater than or equal to 1, S is less than or equal to N; the terminal determines the CSI to be fed back; wherein, the CSI to be fed back is divided into a first part of CSI and a second part of CSI, and the first part of CSI includes each of the N subbands The CQI of the subbands, the second part of CSI includes the precoding matrix indication PMI of each subband in the S subbands of the N subbands; the terminal feeds back the CSI to be fed back to the base station.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a channel state information (CSI) feedback method, a terminal and a base station. Background technique [0002] In the fifth-generation mobile communication technology (5-Generation, 5G) new air interface (New Radio, NR) multiple-input multiple-output (Multiple-Input Multiple-Output, MIMO) system, the terminal reports the channel state information (Channel State Information) to the base station , CSI), the CSI is generally divided into the first part of the CSI and the second part of the CSI for reporting. [0003] In order for the terminal to report the CSI to the base station for base station scheduling, the base station needs to allocate uplink channel resources for the terminal to report the CSI. When the allocation of uplink channel resources is insufficient, the terminal cannot report all the complete first part of CSI and the complete second part of CSI. In this c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0456H04B7/0626
Inventor 李辉白文岭高秋彬拉盖施陈润华苏昕黄秋萍
Owner DATANG MOBILE COMM EQUIP CO LTD