5G NR Code Block Group Mapping for Decoding Delay Reduction
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Solution Overview
Problem
In 5G NR systems, the flexibility of resource mapping for code block groups (CBGs) with varying numbers of code blocks, code rates, or modulation and code levels leads to decoding delays, which are not efficiently managed, impacting transmission efficiency and user experience.
Innovation Solution
The data is segmented into CBGs and mapped to physical resources such that the CBG with a longer decoding delay is transmitted earlier than those with shorter delays, balancing out decoding delays through subsequent transmission delays, thereby reducing overall reception delay and improving transmission efficiency and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If CBGs with different information amounts are mapped to physical resources in arbitrary order, then resource mapping flexibility is improved, but decoding delay increases
Solution Approach 1:
The patent applies preliminary action by sorting CBGs in descending order of their information amounts before mapping to physical resources. This pre-arrangement ensures that CBGs requiring longer decoding time are transmitted first, allowing the receiver to decode them earlier and balance overall decoding delays, thus reducing total reception delay while maintaining mapping flexibility.
Solution Approach 2:
The patent changes the mapping parameter by ordering CBGs based on their information amount parameters. By sorting CBGs according to their size (information amount) and mapping larger CBGs to earlier physical resources, the system optimizes the balance between decoding delays of different CBGs, reducing overall reception delay while preserving resource mapping flexibility.
2Ease of manufacture
If CBGs are mapped to physical resources without considering decoding delay, then resource allocation simplicity is improved, but overall reception delay increases
Solution Approach 1:
The patent applies preliminary action by pre-sorting CBGs based on their information amounts before resource mapping. This simple sorting operation balances decoding delays without requiring complex real-time calculations, maintaining ease of resource allocation while significantly reducing overall reception delay.
Solution Approach 2:
The patent introduces a sorting parameter (information amount) to guide resource mapping. By changing the mapping strategy from arbitrary to parameter-based sorting, the system achieves better delay balance with minimal additional complexity, as the sorting can be performed efficiently based on already-known CBG sizes.
3Ease of operation
If CBGs with larger information amounts are transmitted later, then transmission order simplicity is improved, but decoding delay balance deteriorates
Solution Approach 1:
The patent applies inversion by transmitting CBGs in reverse order of their information amounts - larger CBGs are transmitted first instead of later. This inverted approach balances decoding delays because larger CBGs require more processing time, and by transmitting them earlier, the receiver can decode them while smaller CBGs are being transmitted, achieving better delay balance.
Solution Approach 2:
The patent changes the transmission order parameter from default (arbitrary or sequential) to reverse-order based on information amount. By sorting CBGs in descending order of size and mapping to ascending physical resources, the system achieves optimal decoding delay balance while maintaining operational simplicity through a clear sorting criterion.
Data Source
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AI summary
Embodiments of the present invention disclose a method for data transmission by mapping and a related product. The method comprises: decomposing data to be sent into N encoding blocks, and dividing the N encoding blocks into at least M encoding block groups; and mapping the M encoding block groups to one or more transmission units for bearer transmission, the M encoding block groups comprising at least a first encoding block group and a second encoding block group, the one or more transmission units comprising at least a first physical resource corresponding to the first encoding block group and a second physical resource corresponding to the second encoding block group, an information capacity parameter of the first encoding block group and an information capacity parameter of the second encoding block group satisfying a preset relationship, and a time-domain position of the first physical resource being earlier than a time-domain position of the second physical resource. The embodiments of the present invention are advantageous for reducing data transmission delays of communication systems and improving data transmission efficiency and user experience.