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Multi-data stream transmission power distribution method and apparatus

A distribution method and a technology of a distribution device, which are applied in digital transmission systems, transmission control/equalization, power management, etc., and can solve problems such as not considering differences in channel quality, reducing power utilization, and affecting system capacity maximization, etc. , to achieve the effect of large capacity gain and system capacity increase

Active Publication Date: 2012-01-25
HUAWEI TECH CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] In a MIMO system, the channel conditions experienced by different data streams are different, but the method in the prior art which adopts the method of evenly allocating the power of each data stream does not take into account the difference in channel quality. The transmit power allocated to the stream is the same as the transmit power allocated to the data stream with poor channel quality. Therefore, for the data stream with poor channel quality, the power utilization rate will be reduced due to the large transmit power allocated, thus affecting the Maximize system capacity

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  • Multi-data stream transmission power distribution method and apparatus
  • Multi-data stream transmission power distribution method and apparatus
  • Multi-data stream transmission power distribution method and apparatus

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Embodiment Construction

[0021] The specific implementation manners of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0022] Such as figure 1 As shown, it is the flow of the method for allocating transmission power of multiple data streams in an embodiment of the present invention:

[0023] S101: Receive a channel quality indicator (CQI) value of a data stream reported by a terminal.

[0024] The CQI value indicates the quality of the current wireless channel, and the CQI-TBS table defines the minimum threshold value CQI of CQI min and the maximum threshold CQI of CQI Imax . On the terminal side, the received pilot signal is measured, and then the measured result is converted into a corresponding integer value (that is, the CQI value) and reported.

[0025] S102: Obtain a linear value of power allocated to each data stream by using a water filling algorithm according to the CQI value.

[0026] The method of using...

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Abstract

The embodiment of the invention discloses a distribution method of multi-data flow transmitting power and a device thereof, including: receiving the channel quality indication (CQI) value of the data flow reported by the terminal; obtaining the linear value of the power distributed to each data flow adopting the water injection method according to the CQI value; distributing the power for the data flow according to the linear value. The invention can distribute different power for the data flow according to the channel quality of the different data flow, thereby increasing the capacity of thechannel. The method can obtain larger capacity gain especially in the middle and the low signal to noise ratio compared with the method adopting the average distribution power.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for allocating transmission power of multiple data streams. Background technique [0002] In order to improve the capacity of the communication system, the communication system usually adopts pre-coded MIMO (Multiple Input Multiple Output) technology. For transmission, when multiple data streams are selected for transmission, it is necessary to allocate transmission power for each data stream, so as to select a corresponding transport block size (TBS) for multiple data stream transmission according to the transmission power. [0003] An existing transmission power allocation method for multiple data streams in a MIMO system is to distribute transmission power equally to multiple data streams, and evenly distribute the total transmission power to each data stream, so that the transmission power of each data stream is equal. . However, during the proces...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005H04B7/02H04L12/56H04L1/00
CPCH04W52/42
Inventor 张帆刘奇
Owner HUAWEI TECH CO LTD