PUCCH Coding Selection for Mixed-Priority HARQ-ACK UCI
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Solution Overview
Problem
Existing wireless communication systems struggle to efficiently handle transmissions with different priority levels, leading to issues such as discarding lower priority UCI when higher priority UCI is present, which affects overall transmission performance.
Innovation Solution
A method for multiplexing UCI with different priority levels using separate or joint channel coding based on priority indices, dynamically adjusted through signaling and DCI, to optimize transmission performance without increasing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate channel coding is used for HARQ-ACK bits with different priority levels, then transmission reliability of high priority data is improved, but device complexity increases
Solution Approach 1:
The patent segments the channel coding process by applying separate channel coding to high priority HARQ-ACK bits and low priority HARQ-ACK bits independently. This segmentation allows each priority level to be protected according to its specific reliability requirements, improving overall transmission reliability while maintaining manageable device complexity through modular processing.
Solution Approach 2:
The patent introduces dynamic selection between separate channel coding and joint channel coding based on priority indices and signaling. The coding approach is not fixed but adapts dynamically according to the priority levels of incoming data, allowing the system to optimize between reliability and complexity in real-time based on traffic conditions.
2Device complexity
If joint channel coding is used for HARQ-ACK bits with different priority levels, then device complexity is reduced, but transmission reliability of high priority data deteriorates
Solution Approach 1:
The system dynamically switches between joint channel coding (simpler, lower complexity) and separate channel coding (more complex, higher reliability) based on the priority indices of the data being transmitted. When high priority data is detected, the system transitions to separate coding to ensure reliability; when only low priority data is present, joint coding is used to reduce complexity.
3Adaptability or versatility
If flexible coding method configuration is implemented, then adaptability to different priority requirements is improved, but signaling overhead increases
Solution Approach 1:
The patent changes the parameter being signaled from a direct indication of coding method to an indication of priority index. This parameter transformation allows the system to infer the appropriate coding method from the priority levels of the data, achieving flexible adaptability to different priority requirements while minimizing signaling overhead by avoiding direct coding method specifications.
4Reliability
If priority-based separate coding is always applied, then transmission performance is improved, but hardware complexity increases
Solution Approach 1:
The patent implements dynamic hardware activation where separate channel coding paths are enabled only when high priority data requiring such protection is detected. When no high priority data is present, the system switches to joint channel coding, effectively deactivating the more complex separate coding hardware paths. This dynamic approach maintains high transmission performance when needed while reducing hardware complexity during normal operation.
Data Source
AI summary
A method applied to a first node for wireless communication includes receiving a first information block, transmitting a first PUCCH. The target coding method is one of a first candidate method or a second candidate method, and the first information block is used to determine the target coding method from the first candidate method and the second candidate method. In response to the target coding method being the first candidate method, a bit block obtained by the first bit block through channel coding and a bit block obtained by the second bit block through channel coding are used together to generate the first PUCCH. In response to the target coding method being the second candidate method, bit blocks generated together with the first bit block and the second bit block are used to generate the first PUCCH through channel coding.