Adaptive Retransmission Control for MIMO Throughput
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Solution Overview
Problem
Conventional MIMO communication systems with HARQ struggle to efficiently manage retransmissions due to a lack of consideration for specific error causes, leading to suboptimal retransmission control and reduced system throughput.
Innovation Solution
A retransmission control method that determines the dominant error occurrence factor, such as noise or inter-stream interference, and adjusts the forming or transmission scheme for retransmission packets accordingly, using error occurrence factor estimation and feedback to optimize packet formation and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional HARQ retransmission is performed without considering specific error causes, then retransmission can be implemented, but retransmission efficiency is low and system throughput is reduced
Solution Approach 1:
The receiving apparatus performs preliminary analysis of error occurrence factors (noise, interference, fading) before requesting retransmission. This preliminary action enables the transmitting apparatus to pre-prepare appropriate retransmission schemes, avoiding generic retransmission and improving both efficiency and throughput
Solution Approach 2:
The retransmission scheme is made dynamic by adapting it to different error occurrence factors. The system transitions from a static generic retransmission approach to a dynamic approach where the retransmission method changes based on the identified error cause, thereby improving retransmission efficiency and system throughput
2Ease of operation
If generic retransmission scheme is used for all error types, then implementation is simple, but retransmission efficiency deteriorates
Solution Approach 1:
The retransmission system is segmented into different schemes based on error occurrence factors. Instead of a single generic scheme, the system divides retransmission methods into categories (e.g.,针对不同错误类型的不同重传方案), making each segment optimized for specific error types while maintaining overall system efficiency
Solution Approach 2:
The retransmission scheme parameters are changed based on the identified error occurrence factor. The system modifies transmission parameters such as modulation scheme, coding rate, or resource allocation according to the specific error type, thereby improving retransmission efficiency without significantly complicating the implementation
Data Source
AI summary
A retransmission control scheme and a wireless communication apparatus wherein the efficiency of retransmission control is enhanced to further improve the system throughput. In this wireless communication apparatus (100), an error occurrence factor addressing part (140) receives information related to the error occurrence factor of a transmitted packet or information related to the schemes of forming or transmitting a retransmittal packet corresponding to that error occurrence factor, and switches, based on the received information, the schemes of forming or transmitting the retransmittal packet. In this way, the schemes of forming or transmitting the retransmittal packet can be switched in accordance with the error occurrence factor of the transmitted packet. At the end of receiving the retransmittal packet, therefore, the performing of a decoding processor the like in accordance with that scheme of forming or transmitting can enhance the efficiency of the retransmission control. As a result, the system throughput can be improved.