Feedback method and equipment for signal channel quality information

A technology of channel quality information and channel state information, which is applied in the field of communication, can solve problems such as channel quality information reporting, achieve accurate resource scheduling, and improve performance

Inactive Publication Date: 2012-05-23
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0018] Embodiments of the present invention provide a channel quality information feedback method and device to solve the problem of channel quality information reporting in the channel reciprocity-based transmission scheme existing in the prior art

Method used

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  • Feedback method and equipment for signal channel quality information
  • Feedback method and equipment for signal channel quality information
  • Feedback method and equipment for signal channel quality information

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Embodiment Construction

[0048] As described in the background, since the CQI information calculated by the terminal equipment and fed back to the base station in the prior art is based on single-port transmission or transmit diversity transmission, the base station can only obtain CQI that does not match the actual transmission scheme information, and thus, it is impossible to accurately obtain new arrival quality information.

[0049] In order to solve such a problem, an embodiment of the present invention provides a feedback method of channel quality information. The terminal device calculates the CQI information under the assumption of closed-loop and coding, so that more accurate CQI information can be fed back to the base station, thus, Make the base station obtain more accurate channel state information.

[0050] Such as figure 1 As shown, it is a schematic flowchart of a channel quality information feedback method proposed in an embodiment of the present invention, which specifically includes...

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Abstract

The embodiment of the invention discloses a feedback method and equipment for signal channel quality information. Through the adoption of the technical scheme provided by the embodiment of the invention, terminal equipment calculates channel quality indicator (CQI) information under the condition of hypothetical closed loop pre-coding, factors such as receiving processing algorithms at the terminal equipment side and the like can be more accurately reflected, a base station can be combined with the corresponding CQI information and the signal channel reciprocity processing through the feedback of the CQI information, and more accurate signal channel information can be obtained for carrying out more accurate resource dispatching, so the system performance is improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a feedback method and equipment for channel quality information. Background technique [0002] Each cell in a wireless cellular network system usually has a base station to communicate with terminals. Types of terminals include mobile phones, notebooks, and PDAs. Before the data transmission process starts, the base station will send reference signals (pilot signals) to the terminal, and the terminal will obtain channel estimation values ​​based on these reference signals. A reference signal is a known sequence of signals sent on a specific frequency at a specific time agreed upon. Factors such as interference and noise can affect the quality of channel estimation. [0003] Usually terminals are located in different geographic locations, and have different received signal strengths and strengths of noise and interference. Therefore, some terminals can communicate at a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/00H04L25/02
Inventor 高秋彬苏昕沈祖康肖国军拉盖施孙韶辉
Owner DATANG MOBILE COMM EQUIP CO LTD
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