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Channel state information transmission method and device

A channel state information and transmission method technology, applied in the field of channel state information transmission methods and devices, can solve the problems of not supporting periodic channel state information reporting mode, unable to support CoMP transmission, etc.

Active Publication Date: 2011-11-09
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, none of the above reporting modes can support CoMP transmission, that is, there is currently no periodic channel state information reporting mode that supports CoMP transmission

Method used

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  • Channel state information transmission method and device
  • Channel state information transmission method and device
  • Channel state information transmission method and device

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Embodiment Construction

[0063] Embodiments of the present invention propose a channel state information feedback scheme to support CoMP transmission. In this scheme, the UE can feed back the RI, wideband / subband PMI and CQI of the main transmission point to the eNB (evolved NodeB, evolved NodeB, ie base station) through the PUCCH, and the wideband / subband PMI with RI=1 of each main transmission point and CQI, as well as the CSI-RS index corresponding to the main transmission point and the relative phase information between each transmission point.

[0064] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0065] see figure 1 , is a schematic diagram of a feedback process of channel state information provided by an embodiment of the present invention. As shown in the figure, the process may include:

[0066] Step 101, UE determines channel state information based on channel estimation value;

[0067] Step 102, the UE feeds back t...

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Abstract

The invention discloses a channel state information transmission method and a channel state information transmission device. The method comprises that: user equipment determines channel state information based on a channel estimation value; and the user equipment feeds the channel state information back by utilizing a cyclic reporting mode supporting coordinated multiple point (CoMP) transmission. By the method and the device, channel state information feedback supporting the CoMP transmission can be realized.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for transmitting channel state information. Background technique [0002] LTE-A (Long Term Evolution-Advanced, the follow-up evolution of the long-term evolution technology) adopts the same frequency network, which greatly improves the spectrum utilization rate, but also causes the user signal at the edge of the cell to fade seriously and suffers from high interference from other users. Cell interference, if signal fading and interference problems are not dealt with, will seriously affect the experience of edge users. Coordinated Multiple Point (CoMP) technology introduces information interaction and joint transmission between multiple cells, which can not only improve signal quality but also reduce inter-cell interference, thereby greatly improving the data transmission performance of cell edge users. [0003] The current coordinated m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L25/02
CPCH04B7/0626H04B7/024
Inventor 张然然高秋彬彭莹陈文洪骆纯
Owner DATANG MOBILE COMM EQUIP CO LTD
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