Adaptive Modulation Coding for Low-Delay High-Reliability Transmission
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Solution Overview
Problem
In radio communications systems, existing methods struggle to meet the requirements of low-delay and high-reliability data transmission while maintaining system efficiency, as multiple retransmissions for high reliability increase delay and improving transmission quality reduces efficiency.
Innovation Solution
A data transmission method that dynamically determines a transmission quality target based on delay and reliability requirements, using channel quality information to select an appropriate modulation and coding scheme for each data transmission, allowing for flexible adjustment of transmission quality targets to match service needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple retransmissions are used to ensure transmission quality for high reliability services, then transmission reliability is improved, but transmission delay increases
Solution Approach 1:
The patent applies dynamics by making the transmission quality target adjustable and adaptive rather than fixed. The network device dynamically selects different transmission quality targets based on service characteristics, allowing the system to optimize between reliability and delay requirements for different service types without being constrained by a uniform quality target.
Solution Approach 2:
The patent changes the parameter of transmission quality target from a fixed value to a selectable set of values (first transmission quality target and second transmission quality target). By changing this parameter based on service requirements, the system can achieve high reliability for latency-tolerant services while maintaining low delay for time-sensitive services.
2Reliability
If transmission quality target is improved to meet high reliability requirements, then system transmission efficiency decreases
Solution Approach 1:
The patent applies local quality by applying different transmission quality targets to different services based on their specific requirements. Instead of using a high transmission quality target for all services (which would reduce overall efficiency), the system applies appropriate quality targets locally to each service type, optimizing the balance between reliability and efficiency for each.
Solution Approach 2:
The system dynamically adjusts the transmission quality target based on service characteristics, making the quality requirement adaptive rather than static. This allows the system to maintain high transmission efficiency for services that don't require ultra-high reliability while ensuring high reliability for services that do require it.
Data Source
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AI summary
The present invention relates to the field of communications technologies, and discloses a data transmission method, a device, and a system, to resolve a prior-art problem that a transmission quality target cannot meet a requirement of a low-delay and high-reliability service and a system efficiency requirement at the same time. A specific solution is as follows: A first communications device obtains a first transmission quality target and first channel quality information, determines a modulation and coding scheme MCS of to-be-transmitted data based on the first transmission quality target and the first channel quality information, codes and modulates the to-be-transmitted data based on the MCS of the to-be-transmitted data, and sends the MCS of the to-be-transmitted data and the coded and modulated to-be-transmitted data to a second communications device. The present invention is applied to data transmission.