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MIMO (Multiple Input Multiple Output) mode switching method and device

A technology for equipment and terminal equipment, applied in the field of communications, can solve problems such as computational complexity, affecting MIMO mode switching performance, and prediction errors, and achieve the effects of avoiding prediction errors, reducing implementation complexity, and avoiding influences.

Active Publication Date: 2014-08-20
DATANG MOBILE COMM EQUIP CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing technology is the best in theory, there are problems such as prediction error and computational complexity in the actual system implementation, especially if the prediction error is too large, it will affect the performance of MIMO mode switching

Method used

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  • MIMO (Multiple Input Multiple Output) mode switching method and device
  • MIMO (Multiple Input Multiple Output) mode switching method and device
  • MIMO (Multiple Input Multiple Output) mode switching method and device

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Embodiment Construction

[0028] In response to the problems raised in the background art, the embodiment of the present invention proposes a MIMO mode switching method in an LTE system, which can effectively improve the performance of MIMO mode switching on the basis of less complexity.

[0029] The basic principle of the embodiment of the present invention is to use the RI and CQI reported by the terminal equipment and the instantaneous BLER value calculated by the network side to select the appropriate MIMO mode. When the channel condition is good, the MIMO mode with high throughput is used, and the channel condition is poor. When using a highly reliable MIMO method.

[0030] Such as figure 1 What is shown is a schematic flowchart of a MIMO mode handover method provided by an embodiment of the present invention. The method specifically includes the following steps:

[0031] Step S101: The network side device obtains the current MIMO mode information and channel quality information corresponding to the term...

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Abstract

The invention discloses an MIMO (Multiple Input Multiple Output) mode switching method and device. An MIMO mode which is possibly used at present is judged according to RI (Rank Indication) and CQI (Channel Quality Indicator) information reported by UE (User Equipment) and an instantaneous BLER (Block Error Ratio) value recorded by an eNB (evolved Node B), thereby avoiding forecasting the throughput / system capacity of various MIMO modes, efficiently avoiding the forecasting error and reducing the realizing complexity; and simultaneously, the MIMO mode which is practically used at present is judged by increasing the quantity of to-be-applied records corresponding to the to-be-applied MIMO modes generated based on periodicity, thereby increasing the quantity of switching sample points for judging the MIMO mode, avoiding the influence of an instantaneous channel error on the mode switching property and fully demonstrating the advantages of self-adaption switching.

Description

Technical field [0001] The present invention relates to the field of communication technology, and in particular to a MIMO mode switching method and device. Background technique [0002] The existing MIMO (Multiple-Input Multiple-Out-put) mode adaptive switching generally uses the prediction of the throughput and channel capacity of the two MIMO modes combined with spatial channel characteristic values ​​as channel quality information and feedback to the transmitter. The sending end selects the optimal MIMO method according to the criterion of maximizing throughput or maximizing capacity. [0003] Next, the transmission mode 3 in the LTE (Long Term Evolution) system is taken as an example to describe the process of adaptively selecting the MIMO mode in the prior art. [0004] Transmission mode 3 includes two MIMO modes: transmission diversity and open-loop spatial multiplexing. Assuming that the current channel adopts MIMO mode as transmission diversity, the specific process is as f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L1/16
Inventor 汪玲张凌雁蒋峥于洋李琼
Owner DATANG MOBILE COMM EQUIP CO LTD
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