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Feedback and obtaining methods of channel state information, and equipment

A channel state information, feedback mode technology, applied in electrical components, digital transmission systems, error prevention and other directions, can solve problems affecting system stability, affecting the completeness of channel state information feedback mode, affecting system efficiency, etc.

Active Publication Date: 2012-05-23
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0064] At present, LTE / LTE-A has not specified the feedback period and reporting time of the feedback mode supporting four types of reports, which affects the completeness of this type of channel state information feedback mode in the standard
[0065] In addition, for specific existing technical solutions, even in the existing above-mentioned solutions 1 and 2, the type A report is not reported in the case of PTI=0, that is, the sub-band CQI and the sub-band second PMI value, If the PTI is 0 for a long time or always, the base station cannot know the subband channel state information, which affects the system efficiency; in the above scheme 2, the reporting subframe of the type D report (ie RI and PTI) is related to the PTI value, if the previous PTI If there is an error in the value feedback, it will be difficult to receive subsequent reports, which will affect the stability of the system

Method used

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  • Feedback and obtaining methods of channel state information, and equipment
  • Feedback and obtaining methods of channel state information, and equipment
  • Feedback and obtaining methods of channel state information, and equipment

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Embodiment Construction

[0142] In the LTE-A standard, an extended PUCCH 2-1 feedback mode will be introduced to realize periodic feedback of wideband PMI, wideband CQI and / or subband PMI and subband CQI. In the extended PUCCH 2-1 mode, the UE decides the precoding report type and provides an indication to the base station through the PTI. In the extended PUCCH2-1 mode, a variety of new report types have emerged, but the reporting time and reporting period of these report types are not yet clear, which affects the completeness of the channel state information feedback mode in the standard. Therefore, the technical solution provided by the embodiment of the present invention will provide a solution for reporting and receiving channel state information for the above problems. Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0143] In the process of explanation, the implementation of the UE and the base station will be explained separ...

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Abstract

The invention discloses feedback and obtaining methods of channel state information (CSI), and equipment. The CSI feedback method comprises the following steps that: user equipment (UE) determines antenna port configuration of a base station; the UE determines a data transmission mode and a CSI feedback mode; the UE determines a feedback relevant parameter; and the UE reports the CSI according to the determined antenna port configuration of the base station, the determined data transmission mode, the determined feedback mode and the determined feedback relevant parameter. According to the invention, a feedback period and a feedback time scheme are provided for supporting feedback mode with four report types, so that completeness of a CSI feedback mode in a standard can be improved; moreover, system efficiency can be enhanced; and the system stability and the transmission performance can also be improved.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a feedback and acquisition method and device for channel state information. Background technique [0002] In a MIMO (Multiple-Input Multiple-Output) system, if the transmitter can know the channel information in a certain way, it can optimize the transmitted signal according to the channel characteristics, thereby improving the receiving quality and reducing the complexity of the receiver. degree requirements. In practical systems, channel information is generally fed back in the form of quantized channel information to reduce feedback overhead and improve system transmission efficiency. [0003] In an LTE (Long Term Evolution, long-term evolution) system, an implicit CSI (Channel State Information, channel state information) feedback method based on a codebook is adopted. In order to realize the periodic feedback of channel state information, four different types of report ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00
Inventor 张然然高秋彬苏昕荆梅芳拉盖施
Owner DATANG MOBILE COMM EQUIP CO LTD
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