HARQ-ACK Codebook Determination for Mixed CBG and TB Feedback
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Solution Overview
Problem
The determination of one-shot HARQ-ACK codebooks in communication systems, particularly in NR-U systems, is challenging when a cell supports a CBG-based feedback mode but the physical channel does not correspond to a CBG-based transmission mode.
Innovation Solution
A method for determining a HARQ-ACK codebook is proposed, which involves generating first feedback information for a physical channel corresponding to a HARQ process on a cell that supports CBG-based feedback, and determining a target feedback sequence that orders feedback information based on HARQ process numbers across multiple cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cell supports CBG-based feedback mode but the physical channel does not correspond to CBG-based transmission mode, then the feedback mechanism flexibility is improved, but the codebook determination complexity increases
Solution Approach 1:
The patent applies local quality by differentiating the feedback generation process based on the specific physical channel type. For CBG-based physical channels, the feedback follows CBG-based codebook determination, while for non-CBG-based physical channels, the feedback follows traditional TB-based codebook determination. This localized adaptation resolves the contradiction by making the system flexible enough to handle different channel types while keeping each specific process relatively simple through established methods.
Solution Approach 2:
The patent segments the codebook determination process into distinct pathways based on physical channel characteristics. The feedback information is divided into separate codebooks (CBG-based codebook and TB-based codebook) that are determined independently according to the channel type, then combined in the target feedback sequence. This segmentation reduces overall complexity by applying appropriate simple methods to each segment rather than creating a single complex unified process.
2Productivity
If feedback information is ordered based on HARQ process numbers across multiple cells, then the feedback organization efficiency is improved, but the processing time increases
Solution Approach 1:
The patent applies preliminary action by pre-organizing feedback information according to HARQ process numbers before final sequence determination. The feedback information from multiple cells is sorted and structured in advance based on HARQ process identifiers, which simplifies the subsequent sequencing process and reduces real-time processing time. This pre-organization improves efficiency while minimizing time loss through systematic preparation.
Data Source
AI summary
Provided are a method and apparatus for determining a Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) codebook, and a device and a storage medium. The method includes generating first feedback information, the first feedback information including feedback information for a first physical channel, the first physical channel being a physical channel corresponding to a first HARQ process on a first cell, the first cell supporting a CBG-based feedback mode, and the first physical channel does not correspond to a CBG-based transmission mode; and determining a target feedback sequence. The target feedback sequence includes feedback information ordered based on HARQ process numbers in N cells, the N cells includes the first cell, the feedback information ordered based on HARQ process numbers in the N cells includes the first feedback information, and N is a positive integer.