Code Block Bundle Alignment Signaling for Reliable 5G NR Decoding
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, face challenges in efficiently aligning code block groups (CBGs) and code block bundles (CBBs) for optimal transmission, leading to variability in decoding and increased negative acknowledgement transmissions.
Innovation Solution
A method and apparatus for aligning CBGs and CBBs by using a CBB grouping algorithm indicator to ensure each CBG is associated with a non-overlapping subset of CBBs, with each CBB associated with exactly one CBG, and implementing interleaving and deinterleaving processes for efficient transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If code block groups (CBGs) and code block bundles (CBBs) are aligned with each CBB associated with exactly one CBG and each CBG associated with a non-overlapping subset of CBBs, then decoding variability is reduced and negative acknowledgement transmissions are decreased, but the system complexity and configuration overhead increase
Solution Approach 1:
The patent segments the code block transmission structure by dividing CBGs and CBBs into distinct, non-overlapping groups. Each CBG is associated with a specific subset of CBBs, creating a segmented mapping relationship that prevents decoding variability. This segmentation allows the system to handle each group independently, improving reliability while maintaining manageable complexity through structured organization.
Solution Approach 2:
The patent implements preliminary action by establishing the CBG-CBB association mapping before transmission occurs. The network node determines and signals the grouping configuration in advance through RRC signaling or other control mechanisms, allowing both transmitter and receiver to pre-configure their processing. This preliminary setup eliminates decoding variability without requiring complex real-time adjustments during transmission.
2Reliability
If interleaving and deinterleving processes are implemented for CBBs, then transmission efficiency and reliability are improved, but processing time and computational complexity increase
Solution Approach 1:
The patent applies preliminary action by performing interleaving at the transmitter before CBB transmission and deinterleving at the receiver after reception. The grouping configuration is determined in advance, and interleaving patterns are pre-established based on the CBG-CBB mapping. This allows the system to optimize processing efficiency by avoiding repeated interleaving operations, reducing computational overhead while maintaining transmission reliability.
3Adaptability or versatility
If the network node signals CBB grouping algorithm indicator to the UE, then the UE can calculate appropriate CBB configuration, but signaling overhead and protocol complexity increase
Solution Approach 1:
The patent utilizes parameter changes by introducing a compact CBB grouping algorithm indicator that conveys essential configuration information efficiently. Instead of signaling complete configuration details, the indicator provides a concise reference that the UE uses to calculate the full CBB configuration locally. This parameter-based approach maintains configuration adaptability while significantly reducing signaling overhead compared to explicit configuration messaging.
Data Source
AI summary
A wireless device may receive a code block bundle (CBB) grouping algorithm indicator. The wireless device may calculate a CBB configuration based on the CBB grouping algorithm indicator. The wireless device may transmit a first plurality of CBBs based on the calculated CBB configuration. Each code block group (CBG) of a second plurality of CBGs may be associated with a subset of the first plurality of CBBs. Each code block bundle (CBB) of the first plurality of CBBs may be associated with exactly one of the second plurality of CBGs. To transmit the first plurality of CBBs based on the calculated CBB configuration, the wireless device may interleave code blocks (CBs) associated with each CBB of the first plurality of CBBs. The wireless device may further transmit the interleaved CBs. The transmissions based on the CBB grouping algorithm may apply to both uplink (UL) transmissions and to downlink (DL) transmissions.