Channel state information reporting method and device

A channel state information and channel information technology, applied in the field of channel state information reporting methods and devices, can solve the problems of increased feedback overhead and the like

Active Publication Date: 2013-11-06
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if it is necessary to independently support two-level feedback in PUCCH and PUSCH reporting, it may cause an increase in feedback overhead

Method used

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  • Channel state information reporting method and device
  • Channel state information reporting method and device
  • Channel state information reporting method and device

Examples

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Embodiment Construction

[0027] The embodiment of the present invention proposes a channel state information reporting scheme, which is suitable for a precoding process using a two-level codebook. In this solution, UE can report RI, long-term / wideband PMI and corresponding CQI information to eNB through PUCCH, and can report short-term / frequency selective PMI and corresponding CQI information of multiple subbands to eNB in ​​combination with PUSCH.

[0028] The technical solutions in the present invention will be clearly and completely described below in conjunction with the drawings and specific embodiments of the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] The two-level codebooks in the embodiment of ...

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Abstract

The present invention discloses a method and device for reporting channel state information. The present invention is applied to the process of reporting channel state information through a physical uplink control channel PUCCH and a physical uplink shared channel PUSCH. The method includes: a user terminal from a two-level codebook Selecting the codebook used to report the precoding matrix indicator PMI, and selecting the PMI from the codebook; the two-level codebook includes a codebook reflecting long-term / broadband information and a codebook reflecting short-term / frequency selective channel information; The user terminal determines the parameters used to calculate the channel quality indicator CQI according to the number of data streams RI that can be supported by the downlink and the selected PMI, and calculates the CQI according to the parameters; the user terminal calculates the CQI according to the specified report The mode reports the RI, the selected PMI and the calculated CQI. With the present invention, the existing feedback channels (PUCCH and PUSCH) can be used to realize two-level feedback.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and a device for reporting channel state information. Background technique [0002] In a point-to-point communication system, if the transmitter can obtain a certain channel state information (ChannelState Information, CSI), it can optimize the modulation mode, coding rate and spatial distribution characteristics of signal power of the transmitted signal, so that the transmitted signal and channel propagation characteristics In this way, the reliability of signal reception can be enhanced and the requirements for the complexity of the reception algorithm can be reduced. In a multi-user system, the transmitter can make a scheduling decision based on the obtained CSI, so as to improve the system spectrum efficiency and avoid interference between cells. [0003] In LTE (Long-Term Evolution, long-term evolution) Rel-8 / 9, eNB (base station) can use channel reciprocity o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04W28/16H04W72/12
CPCH04W24/10H04B7/0617H04B7/063H04B7/0639H04B7/065H04B7/0478H04L1/00H04L27/26H04W72/02
Inventor 孙韶辉苏昕缪德山张然然荆梅芳高秋彬肖国军拉盖施
Owner DATANG MOBILE COMM EQUIP CO LTD
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