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Threshold adjusting method and system of modulation coding mode

A modulation and coding mode and threshold adjustment technology, which is applied in the direction of channel coding, transmission system, digital transmission system, etc., can solve the problem that dynamic adjustment cannot adapt well to changes in the channel environment, and achieve fine sample selection and guaranteed rate and block error rate requirements, and the effect of avoiding overshoot problems

Inactive Publication Date: 2015-03-18
POTEVIO INFORMATION TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the dynamic adjustment of the threshold of the MCS cannot well adapt to the change of the channel environment

Method used

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  • Threshold adjusting method and system of modulation coding mode

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Embodiment Construction

[0018] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] figure 1 A flow chart of a method for adjusting an MCS threshold according to an embodiment of the present invention is shown. Such as figure 1 As shown, the method includes:

[0020] Step S1: Obtain a plurality of samples;

[0021] Step S2: Refer to the sample to determine whether the threshold of the MCS needs to be adjusted. When it is judged that it needs to be adjusted up, go to step S3; when it is judged that it needs to be adjusted down, go to step S4; when it is judged that no adjustment is needed, go to step S5.

[0022] Step S3: raise the threshold;

[0023] Step S4: lowering the threshold;

[0024] Step S5: The threshold remains unchanged.

[0025] Wherein, i is an integer greater than or equal to 0.

[0026] Each of the above steps will be described in detail below.

[0027] For step S1, it is assumed that there is an MCS of or...

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Abstract

The invention relates to a threshold adjusting method and system of a modulation coding mode. The method comprises the following steps: obtaining multiple samples, wherein the samples are about feedback information of transmission at a time, the modulation coding mode employed by the transmission corresponding to the feedback information in the (i+2)th sample is MCSi, and the modulation coding mode employed by the transmission corresponding to the feedback information in the first sample is MCS0; determining whether to adjust the threshold of the modulation coding mode MCSi be referring to the (i+1)th sample and the (i+2)th sample, and when it is determined that downward adjusting is needed, adjusting the threshold downwards; when it is determined that upward adjusting is needed, adjusting the threshold upwards; and when it is determined that adjusting is unnecessary, maintaining the threshold unchanged, wherein i is an integer greater than or equal to zero.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and system for adjusting a threshold of a modulation and coding mode. Background technique [0002] In a mobile communication system, as the demand for high-speed data services continues to grow, the base station needs to adaptively select an uplink modulation and coding scheme (MCS) in order to transmit uplink data faster and more accurately. The transmission performance of MCS varies with the signal-to-interference-noise ratio (SINR). Existing communication systems often select the corresponding SINR as the threshold of MCS based on a block error rate of 10%. The base station measures the receiving SINR of the uplink channel in real time, and selects an MCS whose threshold matches the current channel quality. [0003] Usually, the base station pre-provides the MCS-SINR mapping table under a specific channel model through link-level simulation, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
CPCH04L1/0009
Inventor 姜春霞朱颖
Owner POTEVIO INFORMATION TECH CO LTD
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