Method and apparatus for modifying channel quality indication

A channel quality indication, user equipment technology, applied in the direction of link quality-based transmission modification, error detection/prevention using signal quality detectors, signaling as a feature, etc., can solve the existence of feedback delay, reduce system performance, Inapplicability and other problems, to achieve the effect of improving integrity and accuracy, improving CQI mismatch, improving cell throughput performance and frequency utilization

Inactive Publication Date: 2013-08-21
NEC (CHINA) CO LTD
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Problems solved by technology

It is not applicable to occasions where the number of antenna ports is greater than 1
In addition, in the prior art, there is also an outer loop link adaptive technical solution, but this adjustment is realized by increasing or decreasing CQI based on ACK / NACK feedback about codebook selection, which is not a direct adjustment way and there is a feedback delay, and it is very time-consuming, which will also reduce the performance of the system

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  • Method and apparatus for modifying channel quality indication
  • Method and apparatus for modifying channel quality indication
  • Method and apparatus for modifying channel quality indication

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Embodiment Construction

[0035] Hereinafter, the method and device for adjusting CQI provided by the present invention will be described in detail through implementation with reference to the accompanying drawings. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and realize the present invention, but not to limit the scope of the present invention in any way.

[0036] First of all, it needs to be explained that the specific execution sequence of the steps of the method is shown in the present invention. However, the methods do not necessarily have to be performed in the exact order shown, but, depending on the nature of each method step, may be performed in reverse order or simultaneously.

[0037] In this document, the terms "Channel Quality Indicator CQI" and "Signal Noise Interference Ratio SINR" are used. Since there is a mapping relationship between SINR and CQI, SINR and CQI have equivalent meanings in the present invention. ...

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Abstract

The present invention discloses a method and an apparatus for modifying a channel quality indication (CQI). This method may comprise: calculating a scaling factor for the channel quality indication based on uplink channel information and an antenna virtualization pre-coding scheme; and modifying the channel quality indication reported by user equipment by using the scaling factor. According to the technical solutions of the present invention, the antenna virtualization factor is considered in performing CQI modification and. Thus, this solution can overcome the problem of CQI mismatch, enhance the completeness and accuracy of CQI feedback, and improve the cell throughput performance and frequency utilization.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method and equipment for adjusting channel quality indication. Background technique [0002] The continuous growth of mobile data services and the emergence of new applications such as multimedia online games (MMOG), mobile TV, Web2.0, streaming media, etc., have driven the 3rd Generation Partnership Project (3GPP) to develop the Long Term Evolution (LTE) specification . The 3GPP LTE specification is an evolution standard of the hugely successful Global System for Mobile Communications / High Speed ​​Packet Access (GSM / HSPA) technology, which aims to create a series of new standards for new evolved radio access technologies in order to continue to improve cellular Communication system performance, for example to achieve higher throughput and lower packet transmission delay. [0003] The LTE system can operate in a frequency division duplex (FDD) mode and a time div...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/24
CPCH04L1/0026H04L1/20H04B7/0617H04B7/0632
Inventor 王刚张煜孙振年雷鸣
Owner NEC (CHINA) CO LTD
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