Feedback Codebook Arrangement for 5G Acknowledgement Signaling

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Solution Overview

Problem

Current 5G radio access networks face challenges in achieving flexible acknowledgement signaling while minimizing signaling overhead, particularly in dynamic control signaling scenarios, which affects performance and efficiency.

Innovation Solution

The implementation of a method using feedback radio nodes configured with sets of feedback codebooks, allowing for the transmission of feedback signaling based on selected codebooks that indicate arrangements of subpatterns of feedback bits, thereby optimizing acknowledgement signaling with reduced overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If flexible acknowledgement signaling is implemented to serve diverse 5G use cases, then adaptability and versatility are improved, but signaling overhead increases

Engineering Contradiction:

Improveacknowledgement signaling flexibilityVSAvoidsignaling overhead

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The feedback information is segmented into multiple codebooks, each codebook containing specific feedback bits for different purposes. The terminal device selectively reports only the necessary codebooks based on the scheduling situation, dividing the overall feedback into manageable segments that reduce total overhead while maintaining flexibility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The terminal device performs partial feedback reporting by selecting and reporting only the necessary codebooks rather than all configured codebooks. This partial action approach reduces signaling overhead by transmitting only the minimum required feedback information while still maintaining the capability for flexible acknowledgement signaling when needed.

Inventive Principle:

Principle #16Partial or excessive action

2Adaptability or versatility

If multiple feedback codebooks are configured to provide flexible feedback arrangements, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvefeedback arrangement flexibilityVSAvoidcodebook configuration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The codebook configuration is made dynamic rather than static. The network can configure multiple codebooks with different structures, and the terminal dynamically selects which codebook to use based on the specific scheduling situation. This dynamic approach allows the system to adapt to different scenarios without permanently maintaining complex configurations for all possible cases.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes parameters such as the number of codebooks, codebook sizes, and feedback bit arrangements based on the specific 5G use case and scheduling requirements. By adjusting these parameters dynamically, the system achieves adaptability without permanently maintaining maximum complexity, as parameters are optimized for each specific scenario rather than designed for the worst case.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12191947B2Acknowledgement signaling for radio access networks

Publication Date: 2025.01.07 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

There is disclosed a method of operating a feedback radio node in a radio access network, the feedback radio node being configured with a set of feedback codebooks. Each codebook of the set indicates an arrangement of one or more subpatterns of feedback bits into feedback information. The method includes transmitting feedback signaling representing feedback information determined based on a codebook selected from the set of feedback codebooks. The disclosure also pertains to related methods and devices.