Method and device for generating channel quality indicator

A channel quality indication and channel technology, applied in the field of communication, can solve problems affecting throughput, system instability, high HS-DSCH demodulation block error rate, etc.

Active Publication Date: 2013-09-11
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

If the SNR of the n+D subframe is greater than the SNR of the nth subframe, the reported CQI will be too small, and the CQI report that is too small will affect the throughput; if the SNR of the n+D subframe If the noise ratio is smaller than the signal-to-noise ratio of the nth subframe, the reported CQI will be too large, and an excessively large CQI report will cause a high block error rate in HS-DSCH demodulation, which in turn will cause low rate and system instability

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  • Method and device for generating channel quality indicator
  • Method and device for generating channel quality indicator
  • Method and device for generating channel quality indicator

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Embodiment Construction

[0129] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0130] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0131] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0132] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authoriz...

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Abstract

The invention discloses a method and device for generating a channel quality indicator. The method includes an inner loop processing process and/or an outer loop processing process. In the inner loop processing process, a predicted value of a signal to noise ratio can be acquired according to a measured value of the signal to noise ratio and a change rule of the signal to noise ratio, and then a first CQI value can be acquired. In the outer loop processing process, a CQI offset is acquired according to the relationship between the size of an estimated value of a block error rate and the size of a threshold value of the block error rate. A second CQI value can be acquired according to the first CQI value and the CQI offset. Besides, a modulation method can be selected to finish a complete CQI report. With the method, channel quality at the moment when the CQI report becomes valid can be better matched, the block error rate can be effectively controlled, therefore, feedback gain of the CQI can be greatly improved, and the throughput rate and service delay of a terminal can be obviously improved.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a method and device for generating channel quality indicators. Background technique [0002] According to the requirements of the 3GPP protocol, when the system has downlink data to be sent, the Node B (Node B, that is, the base station) first transmits the downlink scheduling on the downlink shared control channel, such as the High Speed ​​Shared Control (HS-SCCH). and control information. [0003] Then, high speed downlink shared channel (High Speed ​​Downlink Shared Channel, HS-DSCH) resources are scheduled to be sent to the terminal. [0004] According to the timing relationship between resources granted by the HS-SCCH and the HS-DSCH, the terminal receives the HS-DSCH channel resources and measures to obtain a channel quality indicator (Channel quality indicator, CQI). [0005] Regarding the generation of CQI, it is generally based on the measured value of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L5/00
Inventor 吴冰冰董霄剑
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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