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

A technology of equipment and terminal equipment, which is applied in the field of communication, can solve problems affecting MIMO mode switching performance, calculation complexity, prediction error, etc., and achieve the effects of reducing implementation complexity, avoiding prediction error, and avoiding impact

Active Publication Date: 2011-11-23
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • 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] Aiming at the problems raised in the background technology, an 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 of the network side to select an appropriate MIMO method. When the channel condition is good, the MIMO method with high throughput is adopted, and when the channel condition is poor, the MIMO method with high throughput is adopted. When using the highly reliable MIMO method.

[0030] like figure 1 As shown, it is a schematic flowchart of a MIMO switching method provided by an embodiment of the present invention, and the method specifically includes the following steps:

[0031] Step S101, the network side device acquires current MIMO mode information and ...

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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, in particular to a MIMO switching method and equipment. Background technique [0002] The existing MIMO (Multiple-Input Multiple-Out-put, Multiple-Input-Multiple-Output, multiple-input-multiple-output) mode adaptive switching generally uses the predicted throughput and channel capacity of the two MIMO modes combined with the spatial channel eigenvalue as channel quality information to be fed back to the sender. The optimal MIMO mode is selected by the transmitting end according to the maximization of throughput or maximization of capacity criterion. [0003] Next, the transmission mode 3 in the LTE (Long Term Evolution, 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 methods, transmit diversity and open-loop spatial multiplexing. Assume that the MIMO me...

Claims

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Application Information

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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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