HARQ Acknowledgement Codebooks for Flexible 5G Feedback Timing
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Solution Overview
Problem
Modern wireless communication systems face challenges with increased signaling overhead due to highly flexible and dynamic HARQ feedback, particularly in 5G networks, which can lead to inefficient resource utilization and management.
Innovation Solution
Implementing multiple HARQ codebooks based on decoding timing capabilities and reception allocation configurations to manage acknowledgement signaling efficiently, allowing for flexible scheduling and reduced overhead, especially in scenarios with multiple transmission opportunities within a timing structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If highly flexible and dynamic HARQ feedback is provided, then a wide variety of use cases are supported, but signaling overhead increases
Solution Approach 1:
The patent divides the HARQ codebook into multiple separate codebooks, each corresponding to different transmission timing intervals. This segmentation allows the system to provide flexible HARQ feedback for different use cases while limiting the overhead of each individual codebook, thus resolving the contradiction between flexibility and overhead.
Solution Approach 2:
The patent implements dynamic selection of HARQ codebooks based on reception allocation configurations and decoding timing information. The wireless device can adaptively choose which codebook to use depending on the specific transmission scenario, maintaining flexibility while optimizing overhead by not always using the most comprehensive codebook.
2Adaptability or versatility
If multiple HARQ codebooks are used for multiple transmission opportunities in the same time interval, then feedback flexibility is improved, but implementation complexity increases
Solution Approach 1:
Each HARQ codebook is designed with specific local qualities tailored to its intended use case, such as different timing relationships or transmission intervals. This allows the system to optimize each codebook for its specific purpose rather than creating a single complex codebook that must handle all scenarios, thereby reducing overall implementation complexity while maintaining flexibility.
Solution Approach 2:
The patent establishes preliminary rules and configurations for selecting and managing multiple HARQ codebooks before actual transmission occurs. By pre-defining codebook structures, timing relationships, and selection criteria based on reception allocation configurations, the system reduces the complexity of real-time decision-making during implementation.
3Loss of time
If multiple HARQ codebooks are implemented, then early feedback and flexible timing are enabled, but management complexity increases
Solution Approach 1:
The patent implements dynamic codebook management where the wireless device selects appropriate HARQ codebooks based on real-time reception allocation configurations and decoding timing capabilities. This dynamic approach enables early feedback when timing conditions permit while automatically managing codebook complexity by only activating the necessary codebooks for each specific transmission scenario.
Solution Approach 2:
The system changes key parameters such as codebook size, timing offsets, and transmission intervals based on reception allocation configurations and decoding timing information. By adapting these parameters dynamically, the system achieves flexible timing for early feedback while keeping codebook management complexity manageable through parameter-based control rather than structural complexity.
Data Source
AI summary
There is disclosed a method of operating a wireless device in a radio access network, the method including transmitting first acknowledgement signaling according to a first HARQ codebook, and transmitting second acknowledgement signaling according to a second HARQ codebook, the first HARQ codebook indicating a first acknowledgement information structure, and the second HARQ codebook indicating a second acknowledgement information structure, wherein the first HARQ codebook and the second HARQ codebook are based on a reception allocation configuration pertaining a first transmission timing interval and decoding timing information indicating a decoding timing capability of the wireless device. The disclosure also pertains to related devices and methods.