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Feedback method, system and device for channel quality indication information

A technology of channel quality indication and adjustment amount, which is applied in the feedback field of channel quality indication information, and can solve problems such as UE being unable to perform CQI information feedback

Active Publication Date: 2013-03-13
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0010] Embodiments of the present invention provide a feedback method, system and equipment for channel quality indication information, which are used to solve the problem in the prior art that UE cannot perform CQI information feedback when the multi-point coordinated transmission scheme of joint transmission is adopted

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  • Feedback method, system and device for channel quality indication information
  • Feedback method, system and device for channel quality indication information
  • Feedback method, system and device for channel quality indication information

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Embodiment Construction

[0032] In order to provide a method for the terminal to feedback CQI information in the multi-point transmission scheme of joint transmission, an embodiment of the present invention provides a method for feedbacking channel quality indication information. After the CQI value from the cell to the terminal, the CQI value of the cell is corrected according to the number of physical antennas of the serving cell or the adjustment value of the shaping gain sent by the network side, and the comprehensive CQI value is determined according to the corrected CQI value, and finally the The integrated CQI value is fed back to the network side. The forming gain adjustment amount of the serving cell is a reference amount representing the adjustment of the beamforming gain of the serving cell.

[0033] see figure 2 , the feedback method of channel quality indication information provided by the embodiment of the present invention specifically includes the following steps:

[0034] Step 20: ...

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Abstract

The invention discloses a feedback method for channel quality indication information, which is that a terminal learns a service cell set which jointly transmits data to the terminal; for each cell in the service cell set, the channel quality indication (CQI) value of the cell to the terminal is determined, the CQI value is corrected according to the physical antenna number or the forming gain adjustment quantity of the cell sent by a network; and the comprehensive CQI value of the service cell set is determined according to the corrected CQI values and is transmitted to the network. The embodiment of the invention additionally discloses a feedback system and a feed back device for channel quality indication information. By adopting the invention, the feedback of the CQI information under joint transmission by the terminal is realized.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a feedback method, system and equipment for channel quality indication information. Background technique [0002] The International Telecommunication Union (ITU) requires the maximum system transmission bandwidth of IMT-Advanced to reach 100MHz, and the peak rates of uplink and downlink data transmission to reach 500Mbps and 1Gbps respectively, and puts forward very high requirements for the average spectrum efficiency of the system, especially the edge spectrum efficiency. In order to meet the requirements of the IMT-Advanced system, the Third Generation Mobile Communications Standardization Organization (3GPP) proposed in the Long Term Evolution Upgrade (LTE-Advanced) system to use a coordinated multi-point transmission technology to improve system performance. [0003] Coordinated multi-point transmission technology is a scheme in which geographically separated mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/02H04W28/24
Inventor 高秋彬孙韶辉缪德山贾保灵
Owner DATANG MOBILE COMM EQUIP CO LTD
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