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MIMO scheduling method, system and device

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

Active Publication Date: 2014-07-02
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • MIMO scheduling method, system and device

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. ,Such as 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 ...

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

The embodiments of the invention relate to the technical field of wireless communications, and especially relate to a MIMO scheduling method, system and device, for solving the problem of not high accuracy of low-Rank CSI obtained after a base station is corrected according to high-Rank CSI in the prior art. In the method provided by the embodiments of the invention, a network side device sends configuration information of N processes to user equipment, N is an integer nor smaller than 2, the configuration information of the N processes is corresponding to the same transmission point, the configuration information of one process from the configuration information of the N processes is correspondingly transmitted in an SU-MIMO mode, and the configuration information of the other processes is correspondingly transmitted in an MU-MIMO mode. The method, system and device provided by the embodiments of the invention can prevent the influence on MU-MIMO due to the not high accuracy of the low-Rank CSI obtained after the base station is corrected according to the high-Rank CSI, thus the transmission of the MU-MIMO can be better supported.

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 Applications(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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