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Method and device for channel state information feedback and configuration

A technology of channel state information and channel measurement, which is applied in transmission path sub-channel allocation, pilot signal allocation, wireless communication, etc. It can solve the problems of lack of flexibility for channel dynamic changes, inability to flexibly change CSI-RS transmission and CSI feedback, etc.

Active Publication Date: 2021-07-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The base station periodically sends precoded pilots (BFed CSI-RS), and each feedback is based on the same channel state information reference signal (CSI-RS) resource configuration, and the transmission of CSI-RS and CSI cannot be flexibly changed according to the channel state. the feedback
[0006] In addition, the base station semi-statically configures a BFed CSI-RS through Radio Resource Control (RRC, Radio Resource Control) signaling, which remains unchanged for a long period of time after configuration, which also lacks the flexibility to adapt to dynamic channel changes

Method used

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  • Method and device for channel state information feedback and configuration
  • Method and device for channel state information feedback and configuration
  • Method and device for channel state information feedback and configuration

Examples

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Embodiment 1

[0098] This embodiment provides a specific implementation of CSI-RS configuration, in which the base station configures Q antenna ports and K sets of CSI-RS resources, and uses the precoding matrix P on the k-th set of CSI-RS resources. k Virtualize Q antenna ports to N k CSI-RS ports, that is, P k for Q row N k matrix of columns.

[0099] Each set of CSI-RS resources includes: CSI-RS ports; CSI-RS time-frequency resources; CSI-RS subframe configuration; UE assumed CSI feedback power; CSI-RS sequence ID generation parameters; code division multiplexing (CDM, Code Division Multiplexing) type parameters; quasi-co-location (QCL, Quasi-Co-Located) parameters;

[0100] Such as Figure 5 As shown, the base station loads the CSI-RS sequence s in K precoding matrices P 1 ,...,P K transmission, that is, the actual transmission on each set of CSI-RS resources is the BFed CSI-RS sequence P 1s ,...,P Ks .

[0101] This embodiment provides a BFed CSI-RS sending method, specificall...

Embodiment 2

[0105] This embodiment provides a BFed CSI-RS resource configuration method, specifically:

[0106] The base station is configured with two types of CSI-RS, which are periodic CSI-RS and aperiodic CSI-RS. Among them, K sets of CSI-RS resources are configured for periodic CSI-RS combination 1, and aperiodic CSI-RS RS combination 2 is configured with L sets of CSI-RS resources.

[0107] The base station can semi-statically or dynamically configure the sending of the CSI-RS sequence. When the base station sends the CSI-RS sequence semi-statically, it will notify the terminal of the configuration through RRC signaling; when the base station dynamically configures the CSI-RS sequence, it will notify the terminal of the configuration through DCI. When the K sets of CSI-RS resources in combination 1 are sent periodically, after receiving them, the terminal measures the channel quality on each CSI-RS resource, and feeds back the CRI corresponding to the best CSI-RS resource, and the ...

Embodiment 3

[0109] This embodiment provides specific implementation manners of CRI feedback under different CSI-RS configurations.

[0110] As described in Embodiment 1 and Embodiment 2, the base station configures two CSI-RS combinations: combination 1 and combination 2. The CSI-RS in combination 1 is sent periodically, including K CSI-RS resources, and the CSI-RS in combination 2 is sent aperiodically, including L CSI-RS resources. When both CSI-RS combinations are configured, the terminal jointly measures the channel quality and feeds back the CRI on the CSI-RS resources of combination 1 and combination 2, which can be fed back in one or more of the following ways:

[0111] Method 1: Jointly process combination 1 and combination 2, and select one of the total K+L CSI-RS resources for feedback, that is, the total number of feedback bits is log 2 (K+L).

[0112] Method 2: Jointly process combination 1 and combination 2. After selecting the best CRI in the two combinations, first use 1-...

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Abstract

The present invention discloses a method and device for channel state information (CSI) feedback and configuration, wherein the method includes: a terminal obtains a CSI process configuration, wherein at least one CSI process configuration includes M sets of channel state information reference signals (CSI-RS) For channel measurement, where M is an integer greater than or equal to 1; the terminal determines m sets of CSI-RS for CSI measurement, and the m sets of CSI-RS are a subset of the M sets of CSI-RS, where m is integer. The present invention realizes flexibly changing CSI-RS sending and CSI feedback according to channel state.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of wireless communication, and in particular to a method and device for feeding back and configuring Channel State Information (CSI, ChannelState Information). Background technique [0002] In a wireless communication system, the transmitting end and the receiving end generally use multiple antennas to transmit and receive to obtain a higher rate. One of the principles of multi-antenna technology is to use some characteristics of the channel to form multi-layer transmission that matches the characteristics of the channel. The radiation direction of the signal is very targeted, which can effectively improve system performance and obtain significant performance without increasing bandwidth and power. The performance improvement of is a very promising technology, which is widely used in current systems. The data transmission performance of a multi-antenna system mainly depends on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L25/02H04B7/0456H04B7/06
CPCH04B7/0456H04B7/0626H04L1/0026H04L25/0224H04B7/0621H04L5/0048H04L1/00H04W16/28
Inventor 吴昊陈艺戬李儒岳鲁照华蔡剑兴肖华华李永王瑜新
Owner ZTE CORP
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