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Method and apparatus for transmitting feedback information to terminal in wireless communication system using CoMP transmission

一种无线通信系统、反馈信息的技术，应用在无线通信系统领域，能够解决不能识别出CoMP、很难提高UE通信性能等问题，达到优化性能的效果

Inactive Publication Date: 2012-07-18
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, although the UE distinguishes between internal eNBs and intermediate eNBs, the UE cannot recognize which CoMP is to be applied to each internal eNB or each intermediate eNB
In this case, it is impossible for the UE to operate correctly in response to the current situation, so that it is difficult to improve the communication performance of the UE at the cell edge

Method used

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  • Method and apparatus for transmitting feedback information to terminal in wireless communication system using CoMP transmission
  • Method and apparatus for transmitting feedback information to terminal in wireless communication system using CoMP transmission
  • Method and apparatus for transmitting feedback information to terminal in wireless communication system using CoMP transmission

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no. 1 approach

[0116] The first implementation mode (using the best accompanying solution)

[0117] Figure 5 is a flowchart illustrating a method for transmitting joint feedback information according to an embodiment of the present invention. In more detail, Figure 5 An example of a CB scheme based on the best companion scheme is shown.

[0118] refer to Figure 5 , in step S301, the UE according to one embodiment of the present invention receives reference signals from each eNB and estimates the channel H of each eNB n . A PMI set optimized for a CB scheme with higher performance sensitivity is determined for the precoder. In this case, the PMI set may be determined according to the best companion solution in step S302.

[0119] If the feedback transmission of the PMI set determined by the best companion scheme is obtained and the eNB configures / uses the associated precoder, the beam formed by the eNB will make the precoding vector H of the serving eNB 1 W 1，CB and the precoding v...

no. 2 approach

[0149] The second implementation mode (worst companionship CB plan)

[0150] Figure 8 is a flowchart illustrating another example of a method for transmitting joint feedback information according to an embodiment of the present invention. In more detail, Figure 8 The CB scheme based on the worst companion scheme is exemplarily shown.

[0151] refer to Figure 8 , in step S401, the UE according to one embodiment of the present invention receives reference signals from each eNB and estimates the channel H of each eNB n .

[0152] In step S402, the optimized PMI set used in the CB scheme with higher performance sensitivity related to the precoder is determined, and the PMI set may be determined according to the worst companion scheme.

[0153] In this case, since the beam formed when the eNB uses the PMI set determined by the worst companion CB scheme can make one precoding vector H 1 W 1，CB and another precoding vector H of the nth neighboring eNB n W n，CB (n>1) maxim...

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Abstract

The present invention relates to a wireless communication system having at least one base station utilizing CoMP (Coordinated Multi-Point) transmission, wherein a terminal receives a reference signal from said at least one base station. If said at least one base station makes a transmission based on said reference signal through Coordinated beamforming (CB), information based on PMI (precoding matrix index) corresponding to each base station is determined. Accordingly, if said at least one base station makes a transmission based on joint processing, phase set information is determined for phase correction of the formed beam. Thus, the present method transmits feedback information, comprising PMI set information based on CB and said phase set information, from said at least one base station to a server base station.

Description

technical field [0001] The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for allowing a User Equipment (UE) to transmit feedback information in a wireless communication system performing a CoMP (Coordinated Multi-Point) operation. Background technique [0002] Recently, the MIMO system has attracted attention as a broadband wireless mobile communication technology. The MIMO system is intended to increase spectral efficiency in proportion to the number of antennas, which is difficult to achieve in communication technologies using conventional single-input single-output (SISO) schemes. MIMO technology refers to a multi-antenna technology that uses multiple antennas to achieve high-speed communication. The MIMO technology is divided into a space multiplexing scheme and a space diversity scheme according to whether the same data is transmitted or different data are transmitted. [0003] In the spatial multiplexin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04
CPCH04B7/0634H04B7/024H04B7/0478H04B7/0626H04B7/0617H04B7/063H04B7/0639H04L25/03821H04W88/02H04W88/08
Inventor 姜智源具滋昊任彬哲郑载薰
Owner LG ELECTRONICS INC
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