A downlink mu‑mimo user pairing method

A user pairing and user technology, applied in the field of network communication, can solve problems such as performance limitations, achieve the effect of fast speed, meet complexity requirements, and improve pairing performance

Inactive Publication Date: 2016-12-21
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the code combination is limited to the unitary matrix and the number of matrices is small, the performance of the PU2RC user pairing method is greatly limited

Method used

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  • A downlink mu‑mimo user pairing method
  • A downlink mu‑mimo user pairing method
  • A downlink mu‑mimo user pairing method

Examples

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Embodiment Construction

[0016] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and examples.

[0017] figure 1 It is a schematic flow chart of the downlink MU-MIMO user pairing method of this application, including the following steps:

[0018] Step 101: Divide code groups according to the correlation between code words.

[0019] According to the existing technology, when each user is only supported to transmit one stream at the same time, the precoding matrix indicator (PMI) fed back by the user is the sequence number of the precoding codeword used to transmit the stream; When transmitting two streams, the PMI fed back by the user is a value uniquely determined according to the precoding vectors of the two streams. The value range of PMI is 0~15. The relationship between PMI, the number of streams transmitted by users at the same time an...

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Abstract

The present application discloses a MU-MIMO user pairing method, which includes: dividing code groups according to the correlation between code words; for a selected code group, finding the feedback precoding matrix indication (PMI) located in the code group. All users, and according to the PMI and channel quality information (CQI) fed back by the users, calculate the maximum CQI value supported by the user combination of the code group, and the corresponding user combination; According to the calculated maximum CQI value of each code group, determine The code group with the largest maximum CQI value and the corresponding user combination are used as the optimal paired user. By applying the present application, the system performance of downlink MU-MIMO user pairing can be improved.

Description

technical field [0001] The present application relates to the technical field of network communication, in particular to a downlink MU-MIMO user pairing method. Background technique [0002] Multi-user-multiple-input multiple-output (MU-MIMO) technology further taps the multi-user selection gain on the basis of MIMO technology to improve spectrum utilization, effectively improving the performance of peak rate, average cell throughput, and edge user throughput. [0003] The implementation basis of MU-MIMO technology is: the base station obtains the channel state information of the terminal, and then completes user pairing according to this information. Considering the trade-off between the amount of feedback data and throughput, the current LTE system adopts a codebook scheme, that is, the same codebook is configured at both the receiving and receiving ends. ) to the base station, and the base station uses the codeword for multi-user selection and precoding to improve system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06
Inventor 解芳韦玮
Owner POTEVIO INFORMATION TECH CO LTD
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