Method, device and system for information feedback in multi-point coordinated joint transmission network

A multi-point cooperation and joint transmission technology, applied in the field of information feedback, can solve the problems of high overhead, high UE processing complexity, and time delay.

Inactive Publication Date: 2011-06-29
ZTE CORP
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Problems solved by technology

[0007] The present invention provides an information feedback method, device and system in a coordinated multi-point joint transmission network, which solves the problems of large overhead, time extension, and high processing complexity of the UE when the terminal feeds back multi-cell phase information to the base station

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  • Method, device and system for information feedback in multi-point coordinated joint transmission network

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Embodiment Construction

[0055] For a terminal, there are multiple combinations of different coordinated cells for joint transmission using multiple coordinated cells in the coordinated set. Each combination corresponds to phase information between multiple cells, and the amount of information is relatively large. The terminal feeds back these phases to the base station Information requires a large overhead.

[0056] Moreover, because the terminal needs to quantize the downlink channel estimation results, there is a quantization error of the codebook; in addition, the types of codebooks are limited, resulting in that there is no corresponding codebook in the terminal for a coordinated cell combination used by the base station, which means In this case, the closest codebook can only be compromised, which further increases the quantization error. Therefore, even if the terminal correctly feeds back the inter-cell information and the intra-cell information, the quantization error will affect the accuracy...

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Abstract

The invention provides a method, a device and a system for information feedback in a multi-point coordinated joint transmission network, relates to the field of mobile communication, and solves the problem that when a terminal feeds back multi-cell phase information to a base station, a large amount of expenditure, long time delay and high UE (User Experience) processing complexity are caused. The method comprises the following steps: a terminal generates a long-term statistical multi-cell correlation matrix according to the estimated result of the downstream channel of each coordinated cell, and the long-term statistical multi-cell correlation matrix comprises the phase information among the coordinated cells; and the terminal sends the long-term statistical multi-cell correlation matrix to a central base station of a coordinated set where the terminal is located according to the preset feedback rule. The technical scheme provided by the invention is suitable for networks adopting multi-point coordinated transmission technology.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to an information feedback method, device and system in a coordinated multi-point joint transmission network. Background technique [0002] In the Long term evolution advanced system (LTE-Advanced for short), in order to improve the average spectrum utilization rate of the cell and the spectrum utilization rate of the cell edge, Coordinated Multipoint Reception and Transmission (CoMP, Coordinated Multipoint Reception and Transmission) technology and multiple Antenna enhancement technology. CoMP technology is divided into coordinated beamforming (CB, Coordinated Beamforming) and joint transmission (JT, Joint Transmission) technology, which can greatly improve the average spectrum efficiency of the cell and the service quality of the cell edge users. In particular, JT can guarantee the quality of service of poor channel quality in edge cells to a large extent. [0003] At...

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Application Information

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IPC IPC(8): H04L25/02H04L1/06H04L1/00H04B7/06
CPCH04B7/065H04B7/024H04B7/0663
Inventor 郭森宝彭爱华魏民
Owner ZTE CORP
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