A method, system and device for mimo scheduling

A technology of user equipment and network side equipment, applied in the field of MIMO scheduling, can solve problems such as low CSI accuracy and MU-MIMO performance impact, and achieve good support and improve system performance

Active Publication Date: 2017-11-10
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention provides a method, system and equipment for MIMO scheduling, which is used to solve the problem that the base station in the prior art corrects the CSI with a low rank according to the CSI with a high rank, and the accuracy of the CSI with a low rank is not high, which has a comparison with the performance of MU-MIMO. big impact issues

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  • A method, system and device for mimo scheduling
  • A method, system and device for mimo scheduling
  • A method, system and device for mimo scheduling

Examples

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example 1

[0067] Example 1. The base station is configured with two processes. Except for the parameters constrained by the codebook subset, the other parameters of the two processes are the same. The codebook subset of one process is normally constrained, and the other process is limited to only report the CSI information of Rank1. ,like figure 2 shown.

[0068] Process 1 feeds back the RI / PMI / CQI of the normal Rank for SU transmission for SU scheduling, and process 2 limits the number of Ranks fed back and feeds back the RI / PMI / CQI of Rank1 for MU scheduling. The base station notifies the user equipment through high-layer signaling that two processes need to be fed back and configuration information of each process. The user equipment receives the configuration information of the two processes, calculates the CSI of the two processes according to the configuration information, and gives feedback. The base station receives the CSI information of the two processes fed back by the use...

example 2

[0069] Example 2. The base station configures two processes. Except for the parameters constrained by the codebook subset, the other parameters of the two processes are the same. The codebook subset of one process is normally constrained, and the other process is limited to the highest feedback Rank of 2. CSI information, that is, report the RI / PMI / CQI of Rank1 / 2, such as image 3 shown.

[0070] Process 1 feeds back the RI / PMI / CQI of the normal Rank for SU transmission, which is used for SU scheduling. Process 2 limits the maximum Rank number of feedback to 2, and feeds back the RI / PMI of Rank1 / 2 (that is, the maximum Rank of limit feedback is 2). / CQI, used for MU scheduling. The base station notifies the UE through high-layer signaling that two processes need to be fed back and configuration information of each process. The user equipment receives the configuration information of the two processes, calculates the CSI of the two processes according to the configuration inf...

example 3

[0071] Example 3. The base station is configured with 3 processes. Except for the parameters constrained by the codebook subset, the other parameters of the 3 processes are the same. The codebook subset of one process is normally constrained, and the other process is limited to only report the PMI / CQI of Rank1. , the last constraint is to report the PMI / CQI of Rank1 / 2, such as Figure 4 shown.

[0072] Process 1 feeds back the RI / PMI / CQI of the normal Rank for SU transmission, which is used for SU scheduling. Process 2 is limited to feeding back only the RI / PMI / CQI of Rank1, which is used for MU scheduling. Process 3 is limited to feeding back the RI with the highest Rank of 2. / PMI / CQI is also used for MU scheduling. When performing MU scheduling, the base station determines the appropriate Rank number for MU transmission of the user equipment according to the low-rank CSI reported by process 2 and process 3 reported by the user equipment. The base station notifies the UE th...

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Abstract

Embodiments of the present invention relate to the field of wireless communication technology, and in particular to a method, system and device for MIMO scheduling, which are used to solve the problem in the prior art that the accuracy of low-rank CSI obtained by base station correction based on high-rank CSI is not high The problem. In the embodiment of the present invention, the network side device sends the configuration information of N processes to the user equipment, where N is an integer not less than 2, the configuration information of the N processes corresponds to the same transmission point, and the configuration information of one process in the configuration information of the N processes The information corresponds to SU‑MIMO transmission, and the configuration information of other processes corresponds to MU‑MIMO transmission. Adopting the embodiment of the present invention can avoid the impact on MU-MIMO due to the low accuracy of the low Rank obtained by the base station after correction according to the high-Rank CSI, so as to better support MU-MIMO transmission.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method, system and equipment for MIMO scheduling. Background technique [0002] MIMO (Multiple-Input Multiple-Output) systems use multiple transmitting and receiving antennas to obtain rate, diversity and array gain by joint processing of signals in the space, time and frequency domains. In a MIMO system, if the transmitter can know the channel information in a certain way, the transmitted signal can be optimized according to the channel characteristics, so as to improve the receiving quality and reduce the complexity requirement of the receiver. In general, a TDD (Time division duplex, time division duplex) system can use channel reciprocity to obtain channel information, but for some special cases of an FDD system or a TDD system, it is necessary to feed back channel information through a receiver. In an actual system, the feedback mode of quantized ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04W72/12
Inventor 荆梅芳高秋彬苏昕
Owner DATANG MOBILE COMM EQUIP CO LTD
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