PDSCH Group ID Signaling for HARQ-ACK Priority
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing communication protocols for 5G systems, particularly in the unlicensed frequency band, lack a clear method to indicate the priority of hybrid automatic repeat request acknowledgement (HARQ-ACK) information for physical downlink shared channels (PDSCH), which is crucial for handling diverse service types like URLLC and eMBB with varying latency and reliability requirements.
Innovation Solution
A communication method and apparatus that utilize an information field in the downlink control information (DCI) to indicate a group identifier for PDSCH, allowing determination of HARQ-ACK priority, enabling separate handling of HARQ-ACK codebooks for different service types without modifying the existing DCI format.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a new DCI format is designed to indicate HARQ-ACK priority, then the priority indication capability is improved, but the device complexity and protocol design complexity increase
Solution Approach 1:
The patent reuses the existing PDSCH group ID field in DCI format 1_1 to indicate HARQ-ACK priority, allowing the same field to serve both its original function of identifying PDSCH groups and the new function of indicating HARQ-ACK priority. This multi-functionality approach avoids designing a new DCI format while enabling priority indication capability.
Solution Approach 2:
The patent changes the interpretation of the PDSCH group ID parameter values to indicate HARQ-ACK priority. By redefining what the existing field values represent (e.g., group ID 0 indicating first priority, group ID 1 indicating second priority), the system enables priority indication without adding new fields or formats, thus reducing complexity.
2Reliability
If the DCI format is modified to include priority indication, then the priority indication capability is improved, but the protocol consistency and simplicity deteriorate
Solution Approach 1:
The patent maintains protocol consistency by having the PDSCH group ID field serve multiple functions: identifying PDSCH groups for resource allocation and indicating HARQ-ACK priority. This approach preserves the existing DCI format structure while enabling new functionality, avoiding protocol fragmentation.
Solution Approach 2:
The patent introduces dynamic interpretation of the PDSCH group ID field based on configuration and context. The field's meaning can switch between indicating PDSCH group identity and indicating HARQ-ACK priority depending on system configuration, allowing flexibility while maintaining format consistency.
Data Source
AI summary
A communication method that can include receiving indication information, the indication information comprising an information field for indicating a packet identifier of a physical downlink shared channel (PDSCH); and determining, according to the information field, a priority of hybrid automatic repeat request acknowledgement (HARQ-ACK) information corresponding to the physical downlink shared channel (PDSCH).