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Method, device, terminal and base station for feeding back channel state information

A state information and feedback channel technology, which is applied in the direction of signaling-based transmission modification based on link quality, error prevention/detection using the return channel, etc., can solve problems affecting the system downlink rate, CQI/PMI calculation errors, update and other issues to achieve the effect of optimizing the downlink rate and avoiding false reports

Active Publication Date: 2019-07-05
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the last reported RI is calculated based on the previous BI and has not been updated based on the latest BI, the last reported RI is actually wrong, resulting in an error in the calculation of CQI / PMI between BI and RI
[0011] The above problems may cause a large number of CQI / PMI calculation errors
For example, when the reporting period of both BI and RI is 200ms, and the offset of BI is 100ms and the offset of RI is 0ms, half of the CQI / PMI is calculated based on the wrong RI, which seriously Affects the downlink rate of the system

Method used

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  • Method, device, terminal and base station for feeding back channel state information
  • Method, device, terminal and base station for feeding back channel state information
  • Method, device, terminal and base station for feeding back channel state information

Examples

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no. 1 example

[0083] According to an aspect of an embodiment of the present invention, a method for feeding back channel state information is provided, which is applied to a terminal. The method firstly receives the first reporting period of the beam index information configured by the base station; then, when the first reporting period When the period arrives, report the beam index information to the base station; finally, report the rank indication information on the next uplink subframe adjacent to the uplink subframe in which the beam index information is reported each time. Therefore, the method for feeding back channel state information in the embodiment of the present invention effectively avoids the bad influence on the downlink rate of the system caused by erroneous reporting of the precoding matrix rank and channel quality indication.

[0084] like image 3 As shown, the method includes:

[0085] Step S31, receiving the first reporting period of the beam index information configu...

no. 2 example

[0100] According to another aspect of the embodiments of the present invention, there is also provided a method for feeding back channel state information, which is applied to a base station. In this method, firstly, the first reporting period for reporting beam index information is configured for the terminal; then, when the first When a reporting period arrives, receive the beam index information reported by the terminal; finally, receive the rank reported by the terminal on the next uplink subframe adjacent to the uplink subframe that reports the beam index information each time Instructions. Therefore, the method for feeding back channel state information in the embodiment of the present invention avoids erroneous reporting of precoding matrix rank and channel quality indication caused by untimely reporting of rank indication information, and optimizes the downlink rate of the system.

[0101] like Figure 4 As shown, the method includes:

[0102] Step S41, configuring a...

no. 3 example

[0115] According to another aspect of the embodiments of the present invention, a device for feeding back channel state information is also provided, which is applied to a terminal, such as Figure 5 As shown, the device 500 for feeding back channel state information applied to the terminal includes:

[0116] The first receiving module 501 is configured to receive the first reporting period of the beam index information configured by the base station;

[0117] A first reporting module 502, configured to report the beam index information to the base station when the first reporting period arrives;

[0118] The second reporting module 503 is configured to report rank indication information on the next uplink subframe adjacent to the uplink subframe in which the beam index information is reported each time.

[0119] Optionally, the device also includes:

[0120] The second receiving module 504 is configured to receive the second reporting period of the rank indication informati...

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Abstract

The invention provides a method, an apparatus, a terminal for feeding-back channel state information and a base station. The method comprises the following steps: receiving the first reporting cycle of the beam index information configured by the base station; when the first reporting cycle is reached, reporting the beam index information to the base station; and reporting the rank indication information on the uplink sub-frame just next to the uplink sub-frame of the beam index information reported each time. According to the technical schemes of the invention, it is possible to report the corresponding updated rank indication information immediately after the terminal reports the beam index information so that the subsequent preset code matrix rank and the channel quality indication could be calculated according to the currently updated rank indication information and that the erroneous reporting of the preset code matrix rank and the channel quality indication incurred from not so instant reporting can be avoided.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method, device, terminal and base station for feeding back channel state information. Background technique [0002] The third-generation multiple-input multiple-output system (3D-MIMO) is an important means to improve the spectral efficiency of cellular systems and enhance network coverage. The main method is to realize the vertical and horizontal beamforming of the transmitted signal through the two-dimensional antenna array at the base station. Compared with the original horizontal beamforming, the vertical beam transmission in 3D-MIMO is finer and more accurate, thus greatly improving the spectral efficiency and service channel coverage of the system. [0003] An important part of 3D-MIMO system design is how to feed back the channel information of the terminal, especially the vertical direction information of the terminal, so that the base station ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/06H04L1/16H04B7/0413
CPCH04B7/0413H04B7/0417H04B7/0486H04L1/0026H04L1/0675H04L1/1607
Inventor 童辉
Owner CHINA MOBILE COMM GRP CO LTD
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