HARQ Feedback Error Handling for Configured Grant
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Solution Overview
Problem
In time-sensitive communications, misinterpretation of Hybrid Automatic Repeat Request (HARQ) feedback by user equipment can lead to inefficient use of radio resources, causing survival time violations and application failures due to incorrect configuration of configured grants (CG) for transport blocks.
Innovation Solution
A method and apparatus for determining errors in interpreting HARQ feedback by network nodes, allowing for transport block mitigation operations to change the scheduled delivery of transport blocks, ensuring correct configuration and efficient resource usage by adjusting the configured grants based on feedback errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If user equipment transmits transport blocks according to configured grants without monitoring HARQ feedback errors, then transmission simplicity is maintained, but radio resource efficiency deteriorates and survival time violations occur
Solution Approach 1:
The network node monitors HARQ feedback signals from user equipment and detects errors in their interpretation. When a HARQ feedback error is detected, the network node sends a correction indication to the user equipment, which then adjusts its transmission behavior to maintain radio resource efficiency while preserving operational simplicity through automated error correction.
2Stability of the object's composition
If user equipment continues transmission after HARQ feedback error without mitigation operation, then transmission continuity is maintained, but application reliability deteriorates due to survival time violations
Solution Approach 1:
The network node performs preliminary monitoring and detection of HARQ feedback errors before they cause survival time violations. By detecting errors in advance and sending correction indications, the system prevents reliability issues while maintaining transmission continuity through proactive error management rather than reactive correction.
3Device complexity
If network node does not monitor HARQ feedback errors, then system complexity is reduced, but resource waste increases due to incorrect configured grant configuration
Solution Approach 1:
The network node autonomously monitors HARQ feedback signals and detects interpretation errors without requiring additional complex signaling protocols. The system serves itself by automatically detecting errors and sending correction indications, thereby preventing resource waste while keeping the system relatively simple through self-diagnostic functionality.
Data Source
AI summary
Techniques of time-sensitive communications include receiving, by the gNB, an indication based on received transport blocks of a burst that the user equipment misinterpreted HARQ feedback and sends the user equipment a command to perform a transport block mitigation operation to change the scheduled delivery of subsequent transport blocks of the burst.