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Channel state information feedback method, information transmission method and device

A technology for channel state information and information transmission, applied in the field of communication, can solve problems such as large delay, and achieve the effects of low feedback overhead, simple implementation and high flexibility

Active Publication Date: 2021-10-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above method will bring more design and definition of feedback modes, and a complete CSI report may need to be completed by reporting multiple feedback modes, resulting in a large delay

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0145] The terminal obtains CSI by measuring the reference signal. A complete CSI report includes CRI, RI, PMI and CQI parameters, which is called the first CSI parameter set. The CSI parameters in the first CSI parameter set are fed back through joint coding.

[0146] For example, if Figure 5 As shown, the value range of CRI is 1 to 8, the value range of RI is 1 to 8, the value range of PMI is 1 to 64, and the value range of CQI is 1 to 16. The value range is 1 to 2 16 , that is, the coding range of the state set (called the first state set) jointly coded by the parameters in the first CSI parameter set is 1 to 2 16 .

[0147] In some scenarios, the terminal does not need to feed back complete CSI. For example, in TDD (Time Division Duplexing, time division duplexing) mode, the terminal can only feed back CRI, RI and CQI, and not feed back PMI, that is, the feedback parameter set is the second The CSI parameter set {CRI, RI, CQI}, the second CSI parameter set is a subset ...

Embodiment 2

[0150] The terminal obtains CSI by measuring the reference signal. A complete CSI report includes CRI, RI, PMI and CQI parameters, which is called the first CSI parameter set. The CSI parameters in the first CSI parameter set are fed back through joint coding.

[0151] For example, if Figure 5 As shown, the value range of CRI is 1 to 8, the value range of RI is 1 to 8, the value range of PMI is 1 to 64, and the value range of CQI is 1 to 16. The value range is 1 to 2 16 , that is, the coding range of the state set (called the first state set) jointly coded by the parameters in the first CSI parameter set is 1 to 2 16 .

[0152] The way of joint encoding of CSI parameters may be to encode CRI, RI, PMI, and CQI in a certain order. For example according to Figure 5 in order, in states 1 through 2 16 In , when every 8 consecutive states indicate a fixed RI, PMI and CQI value combination, the corresponding CRI state change codes; and when every 8 states indicate a fixed CRI,...

Embodiment 3

[0157] The terminal obtains CSI by measuring the reference signal. A complete CSI report includes CRI, RI, PMI and CQI parameters, which is called the first CSI parameter set. The CSI parameters in the first CSI parameter set are fed back through joint coding.

[0158] For example, if Figure 5 As shown, the value range of CRI is 1 to 8, the value range of RI is 1 to 8, the value range of PMI is 1 to 64, and the value range of CQI is 1 to 16. The value range is 1 to 2 16 , that is, the coding range of the state set (called the first state set) jointly coded by the parameters in the first CSI parameter set is 1 to 2 16 .

[0159] In some scenarios, the terminal does not need to feed back complete CSI, but only needs to feed back part of CSI. The base station may notify the terminal of the information of the CSI parameters to be reported (that is, the second CSI parameter set) by configuring signaling, and the terminal reports the CSI report after the parameters in the second...

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Abstract

An information transmission method, comprising: a first communication device selects a subset from a first state set to encode to obtain a second state set, wherein the first state set is jointly encoded by parameters in the first channel state information parameter set A state set, the second state set is a state set in which parameters in the second channel state information parameter set are jointly coded, and the second channel state information parameter set is a subset of the first channel state information parameter set; the first communication device obtains based on measurement The channel state information parameters and the second state set, sending a channel state information report to the second communication device, wherein the channel state information report carries one or more states in the second state set. In this way, under the framework of joint coding of channel state information parameters, feedback of part of channel state information parameters is realized.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a channel state information (Channel State Information, CSI) feedback method, information transmission method and device. 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 principle of the Multiple Input Multiple Output (MIMO) technology is to use some characteristics of the channel to form a multi-layer transmission that matches the characteristics of the channel, so as to effectively improve system performance and obtain bandwidth and power without increasing the bandwidth. Significant performance improvement, is a very promising technology, widely used in current systems. [0003] In MIMO wireless communication, CSI feedback is a key technology to realize high-performance beamforming and precoding. Generally spea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L5/00H04B7/06
CPCH04B7/0626H04B7/0632H04B7/0639H04L1/0026H04L1/0027H04L5/0053H04L5/0057
Inventor 吴昊李儒岳鲁照华陈艺戬徐俊
Owner ZTE CORP
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