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Method and device for distributing power of user dedicated reference symbols

A technology of reference symbols and power, which is applied in power management, spatial transmit diversity, transmission control/equalization, etc., can solve the problem of inability to adjust DRS power, achieve simple DRS power, small system signaling overhead, and improve channel estimation Effect

Active Publication Date: 2009-12-23
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention propose a power allocation method and device for user-specific reference symbols to solve the problem that the prior art cannot adjust the power of DRS according to the data transmission situation

Method used

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  • Method and device for distributing power of user dedicated reference symbols
  • Method and device for distributing power of user dedicated reference symbols
  • Method and device for distributing power of user dedicated reference symbols

Examples

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Comparison scheme
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Embodiment 1

[0039] When using the above option 1, refer to figure 2 As shown, the power allocation method of the user-specific reference symbols in Embodiment 1 of the present invention includes the following steps:

[0040] S201. The base station determines the P of the first downlink resource allocated to the terminal.D1 , and according to the set E of the first downlink resource CRS ,E A and E B Determine P A and P B .

[0041] Among them, P A It is a user-specific parameter, which is equal to E A and E CRS The ratio of , this parameter is configured on a per-user basis and can be changed dynamically. P B is a cell-specific parameter, equal to E B and E A The ratio of , this parameter is configured based on the cell and can be changed semi-statically. E. B is the power per resource unit of the data symbol on the OFDM symbol including the CRS on the first downlink resource. E. CRS It is determined by the base station according to the performance of the downlink related m...

Embodiment 2

[0057] When adopting the above scheme 2, refer to image 3 As shown, the power allocation method of the user-specific reference symbols in Embodiment 2 of the present invention includes the following steps:

[0058] S301. The base station allocates the first downlink resource to the terminal according to the set E CRS ,E A and E B Determine P A and P B , and determine the E of the first downlink resource DRS and P D2 .

[0059] Among them, P A for E A and E CRS ratio of P B for E B and E A The ratio of E B is the power per resource unit of the data symbol on the OFDM symbol including the CRS on the first downlink resource.

[0060] The first downlink resource allocated by the base station to the terminal may include one or more downlink physical resource blocks, and each parameter in Embodiment 1 of the present invention is for each downlink physical resource block in the first downlink resource.

[0061] S302. The base station sends the above E CRS ,P A ,P B...

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Abstract

The invention discloses a method and a device for distributing power of user dedicated reference symbols for solving the problem that the prior art cannot adjust the power of DRS according to the data transmission condition. The method comprises the following steps: sending common reference symbols CRS and dedicated reference symbols DRS of a first downlink resource allocated to a terminal to theterminal; when the current downlink transmission mode is beamforming transmission, determining the power of the DRS on a second downlink resource allocated to the terminal next time according to feedback information of received data quality sent by the terminal. The method and the device can make the power of the DRS dynamically adjusted according to the actual data transmission condition.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to the power allocation technology of user-specific reference symbols. Background technique [0002] MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) technology, as an important physical layer multi-antenna technology for improving transmission quality and efficiency, plays an important role in the new generation communication system. For example, an LTE (Long Term Evolution, long-term evolution) system supports multiple MIMO technologies such as transmit diversity, spatial multiplexing technology, and beamforming. In the existing LTE system, downlink precoding can process multiple codewords at the same time to improve system throughput and different service forms under better transmission conditions; for beamforming, only single data stream transmission is supported. With the further evolution of the LTE standard, dual-stream beamforming may be co...

Claims

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Application Information

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IPC IPC(8): H04B7/005H04B7/08H04B1/707
CPCH04W72/0473H04W52/325H04W72/085H04W72/542
Inventor 潘学明李文刚索士强
Owner DATANG MOBILE COMM EQUIP CO LTD