Downlink power control method and device

A technology of power control and power, applied in the field of communication, can solve the problem that the effect of 64QAM improvement is not obvious

Active Publication Date: 2010-11-17
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0019] In the current LTE standard, CRS already supports pilot power enhancement. From the results of the enhancement, the pilot power enhancement in QPSK modulation is obvious, but the improvement effect of 64QAM is not obvious.

Method used

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  • Downlink power control method and device
  • Downlink power control method and device

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Embodiment Construction

[0042]In the embodiment of the present invention, the base station side sends at least cell-specific parameters containing EPRE information of common pilots and EPRE related information for users, and sends correction information of different user powers to the terminal side; the cell-specific parameters, for users The EPRE related information and the correction information of different user powers are used to provide the terminal side to detect and recover the received data sent by the base station side; The parameters in the correction information of different user powers allocate the power values ​​of symbols on the resource blocks to be sent, and send the resource blocks.

[0043] see figure 2 As shown, the specific process of implementing downlink power control on the base station side in the embodiment of the present invention is as follows:

[0044] Step 201: the base station side sends cell-specific parameters containing at least EPRE information of the common pilot ...

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Abstract

The invention discloses a downlink power control method and a downlink power control device. The method comprises the following steps that: a base station side sends the cell dedicated parameter of EPRE information which at least contains common pilot frequency and user dedicated EPRE related information, and sends the correction information of different user power to a terminal side; the terminal side detects and recovers the received data from the base station side according to the cell dedicated parameter, the user dedicated EPRE related information and the correction information of different user power; and the base station side distributes each symbol power value on a resource block to be sent according to the cell dedicated parameter, the user dedicated EPRE related information and the correction information of different user power and sending the resource block. The method can well improve the error code performance and the capacity of a system.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a downlink power control method and device. Background technique [0002] As an important physical layer multi-antenna technology to improve transmission quality and efficiency, MIMO technology plays an important role in the new generation communication system. For example, the LTE system supports multiple MIMO technologies such as transmit diversity, spatial multiplexing technology, and beam forming (BF, Beam forming). At present, in the LTE system, downlink precoding (percoding) can process multiple codewords (codewords, multiple codewords may come from the same data source of the same user or different data sources of the same user), in order to improve System throughput and different business forms under better transmission conditions; for beamforming, only single data stream (one data stream corresponds to one data source) transmission is supported. With the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/14H04L27/26H04W88/08
Inventor 徐婧潘学明肖国军孙韶辉
Owner DATANG MOBILE COMM EQUIP CO LTD
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