Dynamic HARQ-ACK Codebook Generation for PDSCH Groups
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Solution Overview
Problem
Current technologies lack a solution for generating a dynamic HARQ-ACK codebook when an uplink DCI format 0_1 includes only one UL DAI or one group of UL DAIs, making it impossible to effectively use the UL DAI for reporting HARQ-ACK feedbacks.
Innovation Solution
A method for generating a dynamic HARQ-ACK codebook by receiving first downlink control information (DCI) used for scheduling a physical uplink shared channel (PUSCH), determining a second DAI corresponding to each of N physical downlink shared channel (PDSCH) groups based on the first DAI, and generating a dynamic codebook to be transmitted on the PUSCH, which includes HARQ-ACK bit sequences of the N PDSCH groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal uses one dynamic codebook to perform HARQ-ACK reporting for a maximum of two PDSCH groups, then the HARQ-ACK feedback capability is limited, but the device complexity and signaling overhead are reduced
Solution Approach 1:
The patent segments the HARQ-ACK codebook into multiple independent dynamic codebooks, with each codebook corresponding to a specific PDSCH group. This allows the terminal to generate separate codebooks for different PDSCH groups (first PDSCH group, second PDSCH group, etc.) rather than limiting to a single codebook, thereby enhancing the HARQ-ACK feedback capability while maintaining manageable complexity through structured organization
Solution Approach 2:
The patent creates a universal framework where multiple dynamic codebooks can be generated using a consistent methodology. Each codebook follows the same generation rules based on DCI reception and DAI values, making the system multi-functional in handling different PDSCH groups while maintaining operational simplicity through standardized procedures
2Quantity of substance
If only one UL DAI is included in uplink DCI format 01, then the signaling overhead is reduced, but the ability to generate dynamic codebook for multiple PDSCH groups is insufficient
Solution Approach 1:
The patent segments the codebook generation process into multiple stages, where a single UL DAI value is received and then processed to determine multiple second DAI values corresponding to different PDSCH groups. This segmentation allows one UL DAI to effectively serve multiple codebook generation purposes without increasing signaling overhead
Solution Approach 2:
The patent introduces an intermediary processing mechanism where the received UL DAI value serves as a base that is transformed into multiple second DAI values through predefined rules. This intermediary step enables the system to derive multiple codebook identifiers from a single signaling element, bridging the gap between limited signaling and enhanced codebook generation capability
3Productivity
If PUCCH transmission overlaps with PUSCH transmission in time domain, then the uplink resource utilization is improved, but the HARQ-ACK feedback reliability may be affected due to multiplexing
Solution Approach 1:
The patent segments the HARQ-ACK feedback into multiple dynamic codebooks that can be independently generated and transmitted. When PUCCH and PUSCH overlap, the terminal can multiplex these codebooks onto the PUSCH transmission, ensuring that HARQ-ACK feedback reliability is maintained even when uplink resources are shared, thereby improving overall uplink resource utilization
Data Source
AI summary
A HARQ-ACK codebook generation method, an information transmitting method, a terminal, and a network-side device are provided. The method includes: receiving first downlink control information DCI used for scheduling a first physical uplink shared channel PUSCH, where the first DCI includes a first DAI; determining, based on the first DAI, a second DAI corresponding to each of N physical downlink shared channel PDSCH groups; and generating, based on the determined N second DAIs, a dynamic codebook to be transmitted on the first PUSCH, where the dynamic codebook includes HARQ-ACK bit sequences of the N PDSCH groups, and N is a positive integer.