Method and device for obtaining downlink channel quality information

A technology of channel quality information and acquisition method, applied in the field of downlink channel quality information acquisition, can solve the problems of difference between CQI and actual channel quality, low precision and so on

Active Publication Date: 2013-09-25
HUAWEI TECH CO LTD
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Problems solved by technology

[0009] The inventor of this case found that the OLLA scheme provided by the above-mentioned prior art needs to try to approximate the actual CQI value through continuous iteration. However, the actual CQI value may be constantly changing. Therefore, the accuracy of this approximation is not high, and the obtained CQI There will still be a large difference from the actual channel quality

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  • Method and device for obtaining downlink channel quality information
  • Method and device for obtaining downlink channel quality information

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0032] Please refer to the attached figure 1 , is a schematic diagram of the process of acquiring downlink channel quality information provided by the embodiment of the present invention, mainly including steps S101 to S104:

[0033] S101, the transmission node in the coordinated node set obtains the user equipment UE 11 The received noise power of the nodes in the non-cooperative set to the user equipment UE 11 the interference power.

[0034] In order to improve the coverage of cell edge users and f...

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Abstract

The invention provides a method and device for obtaining downlink channel quality information, so that obtained downlink CQI is matched with actual downlink CQI after the multi-antenna technology is led in a wireless communication system. The method includes the steps that transmission nodes in a cooperation node set obtain received noise power of UE 11 and interference power of nodes in a non-cooperation node set on the UE 11; the transmission nodes in the cooperation node set obtain interference power between users in multi-user scheduling of the transmission nodes in the cooperation node set and power of effective received signals of the UE 11; the transmission nodes in the cooperation node set obtain interference power of non-transmission nodes in the cooperation node set on the UE 11; the ratio of the receiving power of effectively signals and the sum of interference source power and the received noise power of the UE 11 is calculated, and the ratio is used as the value of the downlink CQI between the transmission nodes and the UE 11.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for acquiring downlink channel quality information. Background technique [0002] In existing wireless communication systems, link adaptation technologies including Adaptive Modulation Coding (AMC) and Hybrid Automatic Repeat-reQuest (HARQ) have been widely used. . The core idea of ​​link adaptive technology is to realize rapid adaptation to wireless link quality through AMC technology, thereby improving the spectral efficiency and throughput of the system, and combining HARQ technology to further reduce data loss caused by burst errors and further improve transmission reliability. [0003] The key to effectively realize link adaptation lies in the accuracy and effectiveness of the obtained link (or channel) state information. The channel status information (Channel Status Information, CSI) acquisition in the existing system is divided into upl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/024H04B7/0632Y02D30/70
Inventor 陈大庚毕晓艳张佳胤
Owner HUAWEI TECH CO LTD
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