Priority Bit Mapping in NR Modulation Symbols for Lower Block Errors
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Solution Overview
Problem
Conventional transmission coding solutions in wireless communication networks, such as those for 5G NR communications, do not provide the desired level of speed or customization for efficient operation, particularly in prioritizing bits within modulation symbols for error correction and data transmission.
Innovation Solution
The method involves encoding a code block using a low-density parity-check (LDPC) code to generate systematic and parity bits, determining their degrees, and arranging encoded bits within modulation symbols based on relative priority, with systematic bits having higher priority to enhance error correction and data transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional transmission coding solutions are used, then the system is simple to implement, but the speed and customization level for efficient operation are insufficient
Solution Approach 1:
The patent implements dynamic bit priority assignment within modulation symbols, where the encoder can adaptively determine which bits (systematic or parity) receive higher priority based on channel conditions and transmission requirements. This dynamic approach enables faster and more efficient transmission by optimizing bit mapping in real-time, resolving the contradiction between transmission speed and implementation simplicity.
Solution Approach 2:
The invention changes the parameter of bit priority within modulation symbols, allowing systematic bits or parity bits to be assigned different priority levels. By modifying this parameter dynamically, the system achieves higher transmission speed and customization without requiring fundamentally complex new coding structures, thus resolving the contradiction between productivity and device complexity.
2Reliability
If bits are arranged without priority consideration, then the mapping process is simple, but error correction reliability is reduced
Solution Approach 1:
The patent applies local quality by assigning different priority levels to different bits within modulation symbols. Specifically, systematic bits may be assigned higher priority than parity bits, or vice versa depending on transmission conditions. This localized differentiation of bit quality improves error correction reliability by ensuring critical bits are more robustly transmitted, while adding only moderate complexity to the mapping process.
Solution Approach 2:
The encoder performs preliminary action by determining bit priorities before modulation and mapping. By pre-establishing which bits require higher protection or priority based on the chosen coding scheme (LDPC, polar, etc.), the system improves error correction reliability in advance, while the predetermined nature of this process keeps the added complexity manageable.
3Productivity
If higher order modulation schemes are used, then data transmission efficiency increases, but the reliability of bit transmission decreases
Solution Approach 1:
The patent changes the parameter of bit priority assignment within modulation symbols to compensate for the reduced reliability of higher order modulation schemes. By dynamically adjusting which bits receive higher priority protection in the mapping process, the system maintains data transmission efficiency while improving bit transmission reliability through optimized bit-level protection strategies.
Solution Approach 2:
The invention applies local quality by providing differentiated protection levels for different bits within the same modulation symbol. In higher order modulation where all bits are vulnerable, this approach ensures that critical bits (either systematic or parity depending on conditions) receive enhanced protection through priority-based mapping, thus maintaining reliability while preserving the high efficiency benefits of higher order modulation.
Data Source
AI summary
A new radio (NR) bit prioritization procedure that may be executed by a UE and a base station is disclosed, resulting in transmission and reception of modulation symbols having prioritized bits. For example, a transmitter may encode a code block using low-density parity-check code to generate a stream of encoded bits. The transmitter may arrange the encoded bits in one or more modulation symbols according to a relative priority of the encoded bits. The highest priority bits may be located in the most significant bits of the modulation symbol, and therefore be less likely to experience errors. A receiver may receive the modulation symbols and reorder the encoded bits according to the coding scheme based on the relative priority prior to decoding the encoded bits. The prioritization of the bits within the modulation symbols may provide improved block error rates over sequential mapping of encoded bits to symbols.