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Feedback and acquisition method of channel state information and equipment

A channel state information, feedback mode technology, applied in the direction of preventing/detecting errors through diversity reception, can solve problems affecting system efficiency, affecting system stability, feedback mode feedback cycle and reporting time regulation, etc., to improve the completeness , the effect of improving stability and transmission performance, and improving system efficiency

Active Publication Date: 2012-05-23
DATANG MOBILE COMM EQUIP CO LTD
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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 acquisition method of channel state information and equipment
  • Feedback and acquisition method of channel state information and equipment
  • Feedback and acquisition method of channel state information and equipment

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Embodiment Construction

[0139] 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.

[0140] 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 a feedback and acquisition method of channel state information and equipment. The method comprises the following steps: user equipment determines antenna port configuration of a base station; the user equipment determines a data transmission mode and a feedback mode of the channel state information; the user equipment determines a feedback correlation parameter; according to the determined base station antenna port configuration, the data transmission mode, the feedback mode and the feedback correlation parameter, the user equipment reports the channel state information. The invention provides a feedback period and a feedback time scheme for the feedback mode supporting four report types, and completeness of the channel state information feedback mode in a standard can be raised. System efficiency is raised, and stability and transmission performance of a system are raised.

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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IPC IPC(8): H04L1/06
Inventor 张然然高秋彬荆梅芳拉盖施肖国军
Owner DATANG MOBILE COMM EQUIP CO LTD
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