Adaptive modulation and coding method and adaptive modulation and coding device

Abstract

The invention discloses an adaptive modulation and coding method and an adaptive modulation and coding device. The adaptive modulation and coding method comprises the following steps of: firstly, under the condition that the reported CQI (Channel Quality Indicator) appears for the first time, recording the reported CQI, initializing parameters of the reported CQI, executing the second step and directly executing the second step under the condition that the reported CQI does not appear for the first time; secondly, updating the block error ratio of the CQI corresponding to ACK (Acknowledgement) / NACK (Negative Acknowledgement) according to the reported ACK / NACK and updating a modulation coding mode correction value and a status marker bit of the CQI corresponding to the ACK / NACK when the status marker bit of the CQI corresponding to the ACK / NACK is positioned in an instable state; and thirdly, under the condition that the status marker bit of the reported CQI is instable, acquiring a final MCS (Modulation and Coding Scheme) according to the reported CQI and the modulation coding mode correction value of the reported CQI; and under the condition that the status marker bit of the reported CQI is stable, determining the final MCS according to the reported CQI and the corresponding block error ratio of the reported CQI.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to an adaptive modulation and encoding method and device. Background technique [0002] In related technologies, Long Term Evolution (LTE for short) is a third generation partnership project (3 rd Generation Partnership Project (referred to as 3GPP) under the trend of mobile communication broadband, in order to counter the market challenges of mobile broadband wireless access technologies such as global microwave interconnection access (World interoperability for Microwave Access, referred to as WiMAX), in the ultra-three generation mobile Communication system (Beyond Third Generation in mobile communication system, referred to as B3G) technology based on quasi-fourth generation mobile communication technology (Fourth Generation, referred to as 4G). [0003] LTE uses frequency-division multiple access (Orthogonal Frequency Division Multiplexing, referred to as OFDM) technology ...

AI Technical Summary

Problems solved by technology

[0008] The present invention provides an adaptive modulation and coding method and device to solve the problem in the prior art that MCS selection is unreasonable and terminal problems are caused by different capability levels of terminals, different channel types, and / or unreasonable adaptive modulation and coding methods. Problems with poor throughput performance and poor BLER indicators

Images