UE HARQ-ACK Feedback via Code Block Group Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting acknowledgement information for code block groups (CBGs) across multiple slots, leading to suboptimal resource use and increased latency in data retransmissions, particularly in next-generation wireless access technologies like 5G.
Innovation Solution
A method and apparatus for a user equipment (UE) to generate and transmit acknowledgement information at the CBG level, utilizing different bit sizes based on the number of slots and CBGs, allowing for flexible HARQ-ACK feedback and dynamic scheduling, which can be configured through downlink control information to optimize resource allocation and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If acknowledgement information for multiple slots is transmitted using traditional methods, then coverage is provided, but resource use efficiency deteriorates and latency increases
Solution Approach 1:
The patent segments the acknowledgement information transmission by introducing CBG (Code Block Group) level granularity, allowing individual CBGs to be acknowledged separately rather than treating the entire transport block as a single unit. This segmentation enables more precise feedback and flexible scheduling, improving resource efficiency and reducing latency for retransmissions.
Solution Approach 2:
The patent implements dynamic scheduling mechanisms where the base station can flexibly allocate resources for HARQ-ACK feedback based on actual transmission conditions. The ability to dynamically adjust scheduling decisions at CBG level allows the system to optimize resource use efficiency and minimize latency adaptively.
2Productivity
If CBG level acknowledgement information is transmitted, then resource use efficiency improves, but device complexity increases
Solution Approach 1:
By segmenting the acknowledgement feedback at the CBG level, the patent enables finer-grained control over resource allocation. Although this increases processing complexity, it allows the system to improve resource use efficiency by transmitting only the necessary acknowledgement information for each CBG, avoiding unnecessary retransmissions of entire transport blocks.
Solution Approach 2:
The patent changes the granularity parameter of acknowledgement feedback from transport block level to CBG level. This parameter change enables more precise resource allocation and improves resource use efficiency, while the increased complexity is managed through standardized processing procedures defined in the communication protocol.
Data Source
AI summary
A method for transmitting acknowledgement information by a user equipment (UE) in a wireless communication system, and an apparatus for supporting the same are disclosed. More particularly, a method for allowing a user equipment (UE) to transmit acknowledgement information for each code block group (CBG) with respect to data received within one or more slots is disclosed.