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Codebook configuration method and user equipment

A configuration method and technology of user equipment, applied in the field of communication, can solve the problem of not defining codebook configuration, feedback mechanism, etc.

Active Publication Date: 2020-04-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For two-dimensional antennas, the configuration and feedback mechanism of the codebook are not defined in the prior art

Method used

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  • Codebook configuration method and user equipment
  • Codebook configuration method and user equipment
  • Codebook configuration method and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0179] The method in Embodiment 2 is also applicable to the configuration information of the codebook subset restriction of the antenna ports in the horizontal direction and the vertical direction. Correspondingly, the first configuration information is the enabling restriction information of the codebook group after all the precoding matrices in the codebook with the number of antenna ports X1 are grouped, and all the precoding matrices in the codebook with the number of antenna ports are X1 The grouping is predefined, and the second configuration information is enabling and restricting information of the precoding matrix in each codebook group. Or, the first configuration information is the enabling restriction information of the codebook group after all the precoding matrices in the codebook with the number of antenna ports being X2 are grouped, and the grouping of all the precoding matrices in the codebook with the number of antenna ports being X2 is predefined, and the se...

Embodiment 3

[0187] The method in the third embodiment is also applicable to the configuration information of the codebook subset restriction of the antenna ports in the horizontal direction and the vertical direction. Correspondingly, the first configuration information is the configuration information of the codebook subset restriction of X5 antenna ports, and the second configuration information is the configuration information of the codebook subset restriction of X6 antenna ports, where X1=X5+X6, and X5 =X6, X5 antenna ports and X6 antenna ports respectively correspond to different polarization directions. Or, the first configuration information is the configuration information of the codebook subset restriction of X7 antenna ports, and the second configuration information is the configuration information of the codebook subset restriction of X8 antenna ports, where X2=X7+X8, and X7= The X8, X7 antenna ports and the X8 antenna ports respectively correspond to different polarization di...

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Abstract

The present invention provides a codebook configuration method and user equipment. The UE receives a reference signal that is of an antenna whose quantity of antenna ports is X and that is sent by a base station and configuration information of a codebook subset restriction for the quantity X of antenna ports, where the configuration information of the codebook subset restriction for the quantity X of antenna ports includes first configuration information and second configuration information; determines, according to the configuration information of the codebook subset restriction for the quantity X of antenna ports, a precoding matrix on which channel measurement and feedback need to be performed; and obtains, by means of measurement according to the reference signal, the precoding matrix on which channel measurement and feedback need to be performed and that is of antenna ports. In the method, the configuration information of the codebook subset restriction for the quantity X of antenna ports is carried in the first configuration information and the second configuration information for feedback, so as to reduce feedback overheads of the configuration information of the codebook subset restriction.

Description

technical field [0001] The present invention relates to communication technology, in particular to a codebook configuration method and user equipment. Background technique [0002] In the downlink (Down Link, DL) of Long Term Evolution (LTE for short), multiple-input multiple-output technology (Multiple-Input Multiple-Output, MIMO for short), and evolved base station (elevated Node B, eNB for short) utilizes a precoding method to obtain beamforming gain and spatial multiplexing gain. In Frequency Division Duplexing (FDD for short) mode, the eNB cannot use the uplink channel (Up Link, UL for short) to estimate the channel information of the DL, so that the user equipment (User Equipment, UE for short) reports the channel information of the DL . The UE uses the most suitable Precoding Matrix Indicator (PMI for short) and rank indication (rankindication, RI for short) to report the DL channel information to the eNB, where the PMI indicates the value of the precoding matrix re...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04B7/06
CPCH04B7/0478H04B7/063H04B7/0663H04L1/06H04B7/0417H04B7/06H04B7/0634H04B7/0639
Inventor 刘鹍鹏刘江华张雷鸣
Owner HUAWEI TECH CO LTD