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Channel state information transmitting method and equipment

A technology of channel state information and transmission method, which is applied in the field of channel state information transmission, and can solve problems such as the lack of definition of the corresponding relationship between precoding matrix indication information and codebook index

Active Publication Date: 2011-06-01
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0057] Embodiments of the present invention provide a method and device for transmitting channel state information, which solves the problem in the prior art that there is no definition of the corresponding relationship between the codebook compressed precoding matrix indication information and the codebook index

Method used

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  • Channel state information transmitting method and equipment
  • Channel state information transmitting method and equipment

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Embodiment Construction

[0082] Based on the defects of the existing technical solutions mentioned in the background technology, the embodiment of the present invention provides a transmission scheme of channel state information. By applying this technical scheme, it can be used in the application of mode 2 in PUCCH1-1 In the scenario, the feedback and reception of channel state information between the base station and the terminal device are realized.

[0083] Such as figure 1 As shown, it is a schematic flowchart of a method for transmitting channel state information proposed in an embodiment of the present invention, which specifically includes the following steps:

[0084] Step S101, the terminal device receives the control signaling sent by the base station.

[0085] Wherein, the control signaling notifies the terminal device that it needs to perform channel state information feedback and the feedback mode adopted for channel state information feedback.

[0086] For the application scenario app...

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Abstract

The embodiment of the invention discloses a channel state information transmitting method and channel state information transmitting equipment. Due to the adoption of the technical scheme provided by the embodiment of the invention, in a long time evolved-advanced (LTE-A) system in a physical uplink control channel 1-1 (PUCCH1-1) feedback mode, for the condition that a codebook is needed to be compressed because a precoding matrix indicator (PMI) feedback at an antenna port 8 is reported on the same subframe and the PUCCH capacity is limited, the definition of the correspondence between a PMI or a PMI pair and a codebook index or a codebook index pair after codebook compression is provided, and channel state information between a base station and terminal equipment can be fed back and received.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a transmission method and equipment for channel state information. Background technique [0002] In a Multiple-Input Multiple-Output (MIMO) 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 Time Evolved, long-term evolution) system, an implicit CSI (Channel State Information, channel state information) feedback method based on a codebook is adopted. UE (User Equipment, user equipment, that is, terminal equipment) measures the downlink channel based o...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L1/00
CPCH04B7/0626H04L1/0028H04L1/0026H04B7/0639H04B7/0652H04L25/0391H04B7/0456H04L1/0031H04B7/0619H04B7/063H04B7/0417
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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