Downlink data transmission method, base station and user equipment

A technology of user equipment and downlink data, applied in the direction of space transmit diversity, diversity/multi-antenna system, etc., can solve the problems of low wireless access quality and low access rate of border users

Inactive Publication Date: 2010-09-22
SHARP KK
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For users at the cell border, due to transmission loss and co-channel interference between cells, border users usually have lower wireless access quality and lower access rate

Method used

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  • Downlink data transmission method, base station and user equipment
  • Downlink data transmission method, base station and user equipment
  • Downlink data transmission method, base station and user equipment

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Embodiment Construction

[0067] Hereinafter, the present invention will be described based on the accompanying drawings. In the following description, some specific embodiments are only for the purpose of description, which should not be construed as any limitation on the present invention, but are only examples. Conventional structures or constructions will be omitted when it may cause to obscure the understanding of the present invention.

[0068] In order to clarify and describe the implementation steps of the present invention in detail, some specific embodiments of the present invention are given below, which are applicable to the LTE-Advanced cellular communication system. It should be noted that the present invention is not limited to the applications described in the embodiments, but is applicable to other communication systems.

[0069] figure 1 It is a schematic diagram for showing the subchannels Subchannel-1 and Subchannel-2 formed by the URS, the CRS and the user receiving antenna respe...

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Abstract

The invention provides a multiple-inputs multiple-outputs / coordinated multipoint (MIMO / CoMP) downlink data transmission method. According to the invention, a base station (eNB) only uses a cell reference signal (CRS) to execute the transmission of downlink data when the rank in a channel space state is not more than a preset threshold; user equipment (UE) only uses the CRS to carry out channel estimation and data demodulation; or the eNB only uses the precoded user reference signal (URS) to execute the transmission of the downlink data and the UE only uses the URS to carry out channel estimation and data demodulation; and the eNB combines the CRS and the precoded URS to execute the transmission of the downlink data and the UE combines the CRS and the URS to carry out channel estimation and data demodulation when the rank in the channel space state is more than the preset threshold. The invention also provides the eNB and the UE which are applicable for realizing the multiple-inputs multiple-outputs / coordinated multipoint downlink data transmission method. The invention can reduce the expenditure of reference signals by selecting the URS or the CRS or acquire higher wave beam-forming gain so as to improve the performance.

Description

technical field [0001] The present invention relates to a cellular mobile communication system, and more particularly, to a multiple-input multiple-output / multi-point coordinated (MIMO / CoMP) downlink data transmission method, which is suitable for using a multi-antenna mobile communication system, and is suitable for realizing the above-mentioned MIMO / CoMP A base station and user equipment of a downlink data transmission method. Background technique [0002] With the development of information technology, mobile terminals have higher and higher requirements for access rate, which requires future mobile communication systems to have a higher transmission rate, which leads to a higher spectrum utilization efficiency for the system. The use of MIMO-Multiple Inputs Multiple Outputs (MIMO-Multiple Inputs Multiple Outputs) multi-antenna transmission technology in a cellular mobile communication system enables users to obtain better wireless access while achieving a great increase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08H04B7/02
Inventor 张应余刘仁茂丁铭黄磊陈晨
Owner SHARP KK
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