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Method and device for feeding back channel state information

A technology for channel state information and state information, which is applied in the directions of signaling, link quality-based transmission modification, spatial transmit diversity, etc., can solve problems such as large feedback overhead, and achieve the effect of reducing feedback overhead.

Inactive Publication Date: 2013-07-24
HUAWEI TECH CO LTD
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  • Abstract
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Problems solved by technology

Therefore, this feedback method causes a large feedback overhead

Method used

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  • Method and device for feeding back channel state information
  • Method and device for feeding back channel state information
  • Method and device for feeding back channel state information

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but 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 creative efforts fall within the protection scope of the present invention.

[0019] The technical scheme of the present invention can be applied to various communication systems that need to feed back channel state information, such as: Global System of Mobile Communications (Global System of Mobile communication, GSM), Code Division Multiple Access (CDMA, Code Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access Wireless), General Packet Radio Service (GPRS, Gen...

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Abstract

The invention provides a method and a device for feeding back channel state information. The method for feeding back the channel state information includes the following steps: determining a first category of channel state information (CSI) based on a variety of assumed conditions, sending the first category of the CSI to a base station, receiving configuration signaling which is sent by the base station, wherein the configuration signaling is used for indicating a part of assumed conditions which are selected by the base station according to the first category of the CSI from the variety of the assumed conditions, and sending a second category of the CSI based on the part of the assumed conditions to the base station. According to the method and the device for feeding back the channel state information, the first category of the CSI based on the variety of the assumed conditions and the second category of the CSI based on the part of the assumed conditions are fed back to the base station through user equipment (UE), all the CSI of a plurality of transfer points does not need to be fed back, and therefore feedback overhead is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the field of wireless communication, and more specifically, to a method and device for feeding back channel state information. Background technique [0002] In a traditional wireless communication system, each user equipment (User Equipment, UE) usually only receives data and signaling information sent from one cell, where each cell corresponds to a transmission point with a transceiver device, and a transmission point with a transceiver device Points can correspond to one or more antennas. [0003] With the advancement of technology, people have proposed Coordinated Multiple Point transmission / reception (CoMP) technology, that is, multiple cells can serve the same UE at the same time, which can improve the quality of the signal received by the UE. Thereby improving the transmission efficiency. In a CoMP system, in order to enable reasonable coordination between multiple cells, the base station responsib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06H04L5/00H04B7/06
CPCH04L1/0028H04L1/00
Inventor 夏亮周永行
Owner HUAWEI TECH CO LTD
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