Priority-Aware HARQ-ACK Codebooks for One-Shot Uplink Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in managing multiple Hybrid Automatic Repeat Request (HARQ) acknowledgment (ACK) codebooks with differing priorities and single-shot HARQ-ACK codebooks within 3GPP New Radio (NR) specifications, leading to inefficiencies in error correction and retransmission processes.
Innovation Solution
A wireless communication device is configured to manage multiple HARQ-ACK codebooks, including priority-based and one-shot codebooks, by prioritizing the use of one-shot HARQ-ACK codebooks in combination with priority-based codebooks, enabling efficient processing and multiplexing of physical uplink channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple priority-based HARQ-ACK codebooks are managed separately, then reliability of error correction is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple priority-based HARQ-ACK codebooks into a single unified codebook structure. Instead of managing separate codebooks for different priorities, the invention merges them while maintaining priority differentiation through indexing mechanisms, thereby reducing the complexity of codebook management while preserving the reliability benefits of priority-based handling.
Solution Approach 2:
The unified HARQ-ACK codebook is designed to serve multiple priority levels simultaneously. A single codebook structure handles both high-priority and low-priority acknowledgments, making the system more versatile and reducing the need for separate management mechanisms for different codebooks.
2Productivity
If one-shot HARQ-ACK codebooks are used, then productivity of feedback processing is improved, but measurement precision of individual ACK/NACK status deteriorates
Solution Approach 1:
The one-shot HARQ-ACK codebook is segmented into different priority groups or sections. Each segment corresponds to a specific priority level, allowing the system to maintain the efficiency of one-shot feedback while preserving the ability to accurately identify and process individual ACK/NACK statuses according to their priority levels.
Solution Approach 2:
Different portions of the unified codebook are assigned different qualities or characteristics based on priority. High-priority ACK/NACK bits are positioned or marked differently from low-priority ones, enabling the receiver to apply different processing priorities to different parts of the same codebook, thus maintaining both efficiency and precision.
3Reliability
If priority-based codebooks are used, then reliability of urgent data transmission is improved, but loss of time in processing multiple codebooks increases
Solution Approach 1:
By merging priority-based codebooks into a single unified structure, the patent eliminates the time required to switch between or process multiple separate codebooks. The unified codebook maintains priority information through indexing or positioning, allowing urgent (high-priority) acknowledgments to be quickly identified and processed without the overhead of managing multiple separate codebook structures.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Aspects relate to configuring and managing hybrid automatic repeat request (HARQ)-acknowledgment (ACK) feedback codebooks for use in wireless communication systems. The HARQ-ACK codebooks include priority-based HARQ-ACK codebooks of differing priorities, such as Type 1 and Type 2 codebooks, and one-shot (Type 3) HARQ-ACK codebooks. In one example, a wireless communication device may be configured to obtain a set of HARQ-ACK codebooks that include priority-based HARQ-ACK codebooks of differing priorities and a separate one-shot HARQ-ACK codebook. The wireless communication device may further be configured to process first and second physical uplink channels based on the priority of the first physical uplink channel and the priority of the second physical uplink channel, where one of the two physical uplink channels includes the one-shot HARQ-ACK codebook, and with the processing performed in combination with the use of the priority-based HARQ-ACK codebooks.