HARQ-ACK Codebook Configuration for Multi-Slot PDSCH Scheduling
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Solution Overview
Problem
The introduction of multi-slot PDSCH scheduling in wireless communication technology poses a challenge in ensuring that the Type1 HARQ-ACK codebook fully contains all scheduled PDSCH slots, as the feedback window determination based on a single-slot scheduling scenario may not be sufficient.
Innovation Solution
A method for configuring and decoding the HARQ-ACK codebook, where the timing K1 set in a second scenario is determined based on the timing K1 set in a first scenario and the timing K0 set in the second scenario, allowing for the inclusion of all PDSCHs scheduled by one DCI in the feedback window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the feedback window is determined based on the K1 set in a single-slot scheduling scenario, then the Type1 codebook configuration is simple, but the codebook does not fully contain the slots of all PDSCH scheduled by DCI in multi-slot scheduling scenario
Solution Approach 1:
The patent dynamically adjusts the K1 set parameters based on the scheduling scenario. In multi-slot scheduling, the K1 set is determined by combining the original K1 set with the K0 set (time interval between PDCCH and PDSCH), allowing the feedback window to adaptively expand to cover all scheduled PDSCH slots while maintaining a systematic parameter relationship.
Solution Approach 2:
The patent introduces dynamic adaptability by making the K1 set configurable based on the scheduling mode. The system transitions from a static single-slot K1 configuration to a dynamic multi-slot K1 configuration that automatically adjusts according to whether single-slot or multi-slot scheduling is being used, ensuring the codebook always contains the appropriate feedback window.
2Reliability
If the K1 set is extended to cover multi-slot PDSCH scheduling, then the codebook completeness is improved, but the determination complexity of the feedback window increases
Solution Approach 1:
The patent performs preliminary configuration by establishing the relationship between K1 and K0 sets in advance. The network device pre-configures the K0 set for multi-slot scheduling, and the UE uses this pre-configured information to determine the extended K1 set, avoiding complex real-time calculations and reducing determination complexity while ensuring codebook completeness.
Solution Approach 2:
The patent reuses the existing K0 set (which defines PDCCH to PDSCH timing) to construct the extended K1 set for feedback window determination. By copying and combining timing relationships already established in the system, the patent avoids creating entirely new complex determination logic while achieving the required codebook completeness.
Data Source
AI summary
Provided in the present disclosure are a HARQ-ACK codebook configuration method and apparatus, a HARQ-ACK codebook decoding method and apparatus, a device, and a storage medium. The HARQ-ACK codebook configuration method is performed by user equipment, comprises: determining a timing K1 set in a second scenario on the basis of a timing K1 set in a first scenario and a timing K0 set in the second scenario; and configuring a HARQ-ACK codebook on the basis of the timing K1 set in the second scenario. By using the method, a feedback window of a codebook based on a timing K1 set in a second scenario can include all PDSCHs scheduled by a piece of DCI.