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Downlink MCS determination method and device

A determination method and a determination device technology, applied in the field of communication, can solve the problems of affecting cell throughput, affecting user transmission efficiency, different degrees of deviation, etc., to achieve the effect of improving transmission accuracy

Inactive Publication Date: 2020-01-17
POTEVIO INFORMATION TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0005] The downlink MCS is determined based on the reported results of the CQI. Once the CQI is estimated to be inaccurate, the determined MCS will be inaccurate.
[0006] And because the users are distributed in different locations in the cell, the CQI estimation results of different users have different degrees of deviation. If the CQI is adjusted according to a unified method, the selected MCS will also be inaccurate.
This not only affects the transmission efficiency of users, but also affects the overall throughput of the cell

Method used

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  • Downlink MCS determination method and device

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and examples.

[0038] The embodiment of the present application provides a downlink MCS determination method, which considers the different factors of CQI deviations reported by users with different coverage levels, and the number of denials (NACK) and acknowledgments (ACK) that are fed back to users with different coverage levels Whether to adjust the CQI is determined with a preset statistical window as a period, and if the CQI is adjusted for any user, the downlink MCS is determined using the adjusted CQI. This solution can improve the user's transmission accuracy, user throughput and transmission efficiency.

[0039] During specific implementation of the embodiment of the present application, for a user accessing a cell, a corresponding coverage ...

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Abstract

The invention provides a downlink MCS determination method and device. The method comprises the following steps: distributing a corresponding coverage level to a user of an access cell according to the distribution condition of the user; for any user, if it is determined that the number of NACKs fed back by the user is larger than a first preset threshold in a preset statistical window, a channelquality indicator CQI of the user is adjusted downwards by a first preset step length; if it is determined that the ACK number fed back by the user is larger than a second preset threshold, the CQI ofthe user is adjusted upwards by a second preset step length; if it is determined that the CQI of the user is adjusted, determining a corresponding downlink MCS by using the adjusted CQI; wherein thevalues of the preset statistical window, the first preset threshold, the second preset threshold, the first preset step length and the second preset step length are configured according to the coverage level. According to the method, the transmission accuracy, the user throughput and the transmission efficiency of the user can be improved.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a downlink MCS determination method and device. Background technique [0002] A very important feature of wireless channels is that they are highly time-varying, and the fading can reach tens or even dozens of dB in a short period of time. The transmission efficiency of the communication system is greatly improved. [0003] The basic principle is to estimate the channel of data transmission at the receiving end and feed it back to the sending end, so that the sending end can select the corresponding modulation and coding strategy (MCS) for data transmission according to the characteristics of the channel, improving the overall throughput of the system volume and transfer efficiency. [0004] The downlink MCS selection method is to perform CQI measurement and reporting according to the channel quality indicator (CQI, Channel Quality Indicator) reporting mechanis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00
CPCH04L5/0057H04L5/006
Inventor 袁菁李琳
Owner POTEVIO INFORMATION TECH CO LTD
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