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CSI feedback method and device, terminal, base station and storage medium

A terminal and port technology, which is applied in the field of CSI feedback, can solve the problems of affecting feedback timing, affecting the final performance of precoding or beamforming, and deteriorating timeliness and accuracy, so as to meet the needs of CSI feedback timing.

Active Publication Date: 2020-01-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, CSI feedback will generate a certain delay. If the timing delay of CSI feedback is large, the timeliness and accuracy of reporting CSI will deteriorate, thereby affecting the final performance of precoding or beamforming.
At the same time, due to the complexity of the terminal, the terminal will have different capabilities to process CSI, which also affects the CSI feedback timing of the UE to a certain extent.

Method used

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  • CSI feedback method and device, terminal, base station and storage medium
  • CSI feedback method and device, terminal, base station and storage medium
  • CSI feedback method and device, terminal, base station and storage medium

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0032] An embodiment of the present invention provides a method for channel state information CSI feedback, such as figure 1 As shown, the method includes:

[0033] S101. Determine whether the CSI processing unit CPU needs to be rewritten according to the triggered first-type CSI report, and / or according to the signaling or signaling format used to trigger the first-type CSI report;

[0034] S102. When it is determined that rewriting is required, rewrite W CPUs; where W≤X, where X is the maximum number of CPUs supported by the terminal for processing CSI reports.

[0035] The method in the embodiment of the present invention is executed on the terminal side.

[0036] In the embodiment of the present invention, for a terminal that can support a maximum of X CPUs, when it is determined that rewriting is required according to the triggered first-type CSI or the signaling that triggers the first-type CSI, W CPUs are rewritten, that is, The first type of CSI rewrites the W CPUs, ...

Embodiment 2

[0092] In the embodiment of the present invention, for a terminal that can support up to X CPUs, when it is configured with CSI reporting for periodic or semi-persistent feedback, and when at least one of the following conditions is met, the terminal performs fast periodic or semi-persistent feedback CSI feedback.

[0093] Condition 1: The base station only configures this one CSI report;

[0094] Condition 2: From the last symbol of the channel (such as PUCCH or PUSCH) for each transmission of the CSI report to the corresponding CSI reference resource, the report occupies all X CPUs;

[0095] Condition 3: From the last symbol of the channel (such as PUCCH or PUSCH) where the CSI report is transmitted each time, to the latest CSI-RS and / or CSI-IM before the corresponding CSI reference resource, the report occupies all X CPU.

[0096] In addition, the fast periodic or semi-persistent CSI feedback refers to the last symbol of the channel transmitting the CSI report, the number...

Embodiment 3

[0136] An embodiment of the present invention provides a method for channel state information CSI feedback, the method comprising:

[0137] Determine whether to rewrite the CSI processing unit CPU according to the triggered first-type CSI report, and / or according to the signaling or signaling format used to trigger the first-type CSI report; when it is determined that rewriting is required, rewrite Write W said CPUs. Where X is the maximum number of CPUs supported by the terminal for processing CSI reports. That is to say, for a terminal that can support a maximum of X CPUs, when the triggered CSI or the signaling that triggers the CSI satisfies the first condition, the CSI first occupies W CPUs, or the W CPUs are blocked by the CSI. The CSI is rewritten, or the W CPUs are cleared, or the original CSIs in the W CPUs are interrupted.

[0138] In the embodiment of the present invention, for a specific type of CSI, the terminal reports to the base station the required minimum v...

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Abstract

The invention discloses a CSI (Channel State Information) feedback method and device, a terminal, a base station and a storage medium, which are used for operating a CPU (Central Processing Unit) owned by the terminal so as to meet the requirements of different services on CSI feedback timing. The method comprises the following steps: determining whether a CSI processing unit CPU needs to be rewritten or not according to a triggered first type of CSI report and / or according to a signaling or signaling format for triggering the first type of CSI report; when it is determined that rewriting is needed, W CPUs are rewritten; wherein W is smaller than or equal to X, and X is the number of CPUs which are supported by the terminal at most and used for processing CSI reports.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a CSI feedback method, device, terminal, base station and storage medium. Background technique [0002] In a MIMO (Multiple input multiple output, multiple input multiple output technology) wireless communication system, the purpose of improving transmission efficiency and reliability can be achieved by performing precoding or beamforming on multiple transmit antennas. In order to achieve high-performance precoding or beamforming, the precoding matrix or beamforming vector needs to better match the channel, which requires the transmitter to better obtain CSI (Channel State Information, channel state information). [0003] Generally speaking, the CSI feedback requirement of UE (User Equipment, terminal) is included in a given time period, and multiple CSI reports are processed simultaneously. In an existing wireless communication system, in order to describe ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/0413H04L5/00
CPCH04B7/0626H04B7/0413H04L5/0048H04L5/0057H04L5/001H04B7/0645H04L1/0026H04L1/0027H04L5/0053H04W72/23
Inventor 吴昊鲁照华蒋创新韩祥辉夏树强高波
Owner ZTE CORP