Sidelink HARQ-ACK Codebook Transmission via Physical Uplink Channel
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Solution Overview
Problem
In the 5G New Radio (NR) V2X technology, the first terminal cannot associate a sidelink resource with the Physical Downlink Shared Channel (PDSCH) when the sidelink resource is contained in the Downlink Control Information (DCI), making it difficult to transmit Type 1 HARQ-ACK codebooks effectively.
Innovation Solution
The first terminal sends a sidelink HARQ-ACK codebook via a physical uplink channel within a target time unit, ensuring that sidelink HARQ-ACK information can be transmitted correctly and indicating the receiving state of sidelink data, thus avoiding the association issue with PDSCH SLIV.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Type 1 HARQ-ACK codebook is generated based on time domain resources of PDSCH, then the codebook structure is well-defined, but the first terminal cannot associate sidelink resource with PDSCH SLIV when sidelink resource is contained in DCI
Solution Approach 1:
The patent introduces a mapping relationship as an intermediary between sidelink resources and PDSCH time domain resources. Instead of directly associating sidelink resources with PDSCH SLIV, the solution creates an indirect mapping through predefined rules that connect sidelink resource indicators to PDSCH time domain resource characteristics, enabling the terminal to determine the appropriate codebook type without direct association
Solution Approach 2:
The patent changes the parameter basis for codebook type determination from direct PDSCH time domain resource association to a mapping relationship based on sidelink resource characteristics. By transforming the determination parameters from PDSCH-centric to sidelink resource-centric, the system enables Type 1 codebook generation even when sidelink resources are dynamically allocated through DCI
2Adaptability or versatility
If sidelink resource is dynamically allocated through DCI, then resource flexibility is improved, but the terminal cannot determine PDSCH SLIV for Type 1 HARQ-ACK codebook generation
Solution Approach 1:
The patent establishes preliminary mapping relationships between sidelink resource indicators and PDSCH time domain resources before actual data transmission. These pre-defined mapping rules enable the terminal to quickly determine the appropriate HARQ-ACK codebook type without complex real-time calculations, simplifying the operation while maintaining dynamic resource allocation flexibility
Solution Approach 2:
The patent segments the resource allocation process into distinct components: sidelink resource indication in DCI, mapping relationship lookup, and codebook type determination. This segmentation allows each component to be handled independently, reducing operational complexity while preserving the flexibility of dynamic resource allocation
Data Source
AI summary
The present disclosure relates to the technical field of communications, particularly to a feedback information transmission method. The method comprises: sending, by a first terminal, a sidelink hybrid auto repeat request ACK (HARQ-ACK) codebook via a physical uplink channel within a target time unit for sending sidelink HARQ-ACK information within the target time unit, the sidelink HARQ-ACK codebook including sidelink HARQ-ACK information corresponding to at least one sidelink data.