Data Transmission Method Using Redundant Resource Unit Mapping
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Solution Overview
Problem
Conventional modulation and coding schemes in communications systems, particularly for 5G, face limitations in dynamic rate adjustment and transmission reliability, especially with the increasing demand for multimedia applications and machine-type communications, which require more flexible modulation modes to handle varying data rates and improve channel fading resistance.
Innovation Solution
A data transmission method that maps K bits to F resource units, where each bit is redundantly transmitted across at least two units, using channel coding and specific mapping techniques to enhance transmission reliability, and employs a codebook to ensure reliable bit transmission by varying the constellation diagram and resource unit allocation based on bit importance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional modulation and coding schemes are used with fixed rate coding, then system standardization is simplified, but transmission reliability deteriorates under varying data rates and channel conditions
Solution Approach 1:
The patent implements dynamic modulation by mapping bits to resource units based on their importance and channel conditions. The system dynamically adjusts the mapping strategy (e.g., spreading important bits across more resource units when channel conditions are poor) rather than using fixed-rate coding, thereby achieving both adaptability to varying data rates and improved transmission reliability through context-aware bit allocation
Solution Approach 2:
The system changes the mapping parameters (number of resource units per bit, distribution pattern) based on channel quality and data rate requirements. By varying these parameters dynamically, the system adapts to different transmission conditions while maintaining reliability through optimized bit-to-resource-unit mapping strategies
2Reliability
If each bit is mapped to multiple resource units for redundancy, then transmission reliability improves, but device complexity increases
Solution Approach 1:
The patent segments bits into different importance groups (e.g., critical data bits vs. less critical bits) and applies different mapping strategies to each segment. This segmentation allows the system to provide redundancy for important bits while using simpler mapping for less critical bits, thereby improving reliability where needed without uniformly increasing complexity across all bits
Solution Approach 2:
The system applies different mapping qualities to different bits based on their importance. Critical bits receive higher redundancy (mapped to more resource units) while less critical bits use standard mapping. This local differentiation of mapping quality achieves reliability improvement for essential data without the full complexity overhead applied to all bits
3Productivity
If dynamic compression ratio is increased for multimedia applications, then data efficiency improves, but channel fading resistance deteriorates
Solution Approach 1:
The system dynamically adjusts the mapping configuration based on the actual channel conditions and compression ratio. When high compression is used (resulting in fewer redundant bits), the system compensates by optimizing the bit-to-resource-unit mapping to maximize fading resistance. This dynamic adaptation allows the system to maintain both high compression efficiency and adequate channel fading resistance under varying conditions
Data Source
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Figure 2-b
Figure 2-c
AI summary
A data transmission method and a related device are disclosed. The data transmission method includes: obtaining to-be-transmitted K bits; mapping the K bits to F resource units according to a codebook and a value of the K bits, so as to obtain a codeword CK that is to be transmitted by using the F resource units, where the codebook includes S codewords in a one-to-one mapping relationship with S different values of the K bits; and sending the codeword CK by using the F resource units. The solutions provided in embodiments of the present invention help improve bit transmission reliability.