Codebook restriction signaling transmitting and channel information quantized feedback method and device

A technology of channel information feedback and restricted signaling, which is applied in the field of sending codebook restricted signaling, and can solve problems such as high overhead

Active Publication Date: 2017-05-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] The present invention provides a method and device for sending codebook restriction signaling and quantitative feedback of channel information, so as to at least solve the problem of high overhead caused by adopting the codebook restriction method in the related art

Method used

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  • Codebook restriction signaling transmitting and channel information quantized feedback method and device
  • Codebook restriction signaling transmitting and channel information quantized feedback method and device
  • Codebook restriction signaling transmitting and channel information quantized feedback method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] The base station and the terminal jointly save the codebooks corresponding to RI / layer=1, 2...r (corresponding to the codebooks corresponding to different RIs mentioned above) according to the agreed method, or the base station configures information according to the codebook parameters of the base station and Generate a codebook corresponding to RI / layer=1,2...r in a manner agreed with the terminal;

specific Embodiment approach 1-1

[0100] The base station and the terminal agree on a fixed main codebook Cb(r), for example, agree on the following 8Tx codebook (dual PMI codebook, each codeword has 2 indexes), here only the case of RI / layerυ=1,2 is listed. Description; defines the following variables (scalar / vector):

[0101] φ n =e jπn / 2 ,v m =[1 e j2πm / 32 e j4πm / 32 e j6πm / 32 ] T

[0102] Define the Rank1 codeword, Rank1 codeword model and codebook based on the above variables: As shown in Table 4,

[0103] Table 4

[0104]

[0105]

[0106] Define the Rank2 codeword, codeword model and codebook based on the above variables: As shown in Table 5,

[0107] table 5

[0108]

[0109] The codebooks corresponding to other RI / layer values ​​are similar to this;

specific Embodiment approach 1-2

[0111] The base station configures the codebook to generate parameters, and the base station and the terminal parameterize the codebook according to the agreed method;

[0112] Here we take the codebook with RI / Layer=1, 2 as an example, and the codebooks with other RI / layer values ​​are similar; since the occurrence ratio of low Rank is much higher than that of high Rank, in the case of high Rank / layer The number of code words is generally less;

[0113] The codebook generation method of RI / Layer=1 is shown in Table 6:

[0114] Table 6

[0115]

[0116] It can be seen that, for Table 6, each codeword is jointly determined by the values ​​of three indexes, namely i1,1, i1,2, i2, where, N1, N2, O1, O2 and other parameters are configured by the base station. The base station can also configure a subcodebook. The candidate config is shown in Table 7; s1 and s2 represent two horizontally or vertically adjacent Patten in two dimensions Pitch;

[0117] Table 7

[0118] ...

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Abstract

The invention provides a codebook restriction signaling transmitting and channel information quantized feedback method and device. The codebook restriction signaling transmitting method comprises the steps that codebooks corresponding to different rank indications RI in channel information feedback are determined; the codebooks corresponding to different RI are grouped into preset number of groups according to the RI, wherein the preset number is greater than or equal to 2; the codebook restriction modes corresponding to the codebooks in the preset number of groups are determined, wherein the first number of groups in the preset number of groups adopt the first codebook restriction mode, the second number of groups in the preset number of groups adopt the second codebook restriction mode, and the first codebook restriction mode and the second codebook restriction mode are different; and codebook restriction signaling transmitting is performed according to the determined codebook restriction mode. The problem existing in the related technologies of high overhead caused by using the codebook restriction mode in the related technologies can be solved so as to achieve the effect of reducing the resource overhead of codebook restriction.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method and device for sending codebook restriction signaling and quantitative feedback of channel information. Background technique [0002] In a wireless communication system, the transmitting end and the receiving end usually use multiple antennas in a spatial multiplexing manner to obtain a higher rate. Compared with the general spatial multiplexing method, an enhanced technology is that the receiving end feeds back the channel information to the sending end, and the sending end uses the transmit precoding technology according to the obtained channel information, which can greatly improve the transmission performance. For Single User-Multi-input Multi-output (SU-MIMO for short), the channel feature vector information is directly used for precoding; for Multi-User Multi-input In Multi-output (referred to as MU-MIMO for short), relatively accurate channel information is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0456H04L1/00H04L1/16
CPCH04B7/0486H04L1/0029H04L1/1614H04B7/04
Inventor 陈艺戬李儒岳鲁照华肖华华蔡剑兴吴昊李永王瑜新
Owner ZTE CORP
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