Uplink Miss-Detection Determination via Implicit Feedback
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Solution Overview
Problem
Current miss-detection determination methods in 5G NR systems consume a large amount of downlink control signaling resources, making it difficult to meet both low-latency and high-reliability requirements for URLLC services.
Innovation Solution
A method involving the transmission of a target sequence or signal, such as a combination of a Demodulation Reference Signal (DMRS) and a void PUSCH, to determine miss-detection, which reduces the need for explicit HARQ feedback and conserves downlink control resources by using implicit feedback mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If explicit HARQ feedback is used to determine miss-detection, then detection accuracy is improved, but downlink control signaling resources are consumed excessively
Solution Approach 1:
The patent extracts the essential function of miss-detection determination from the full HARQ feedback mechanism. Instead of using complete HARQ feedback which includes both ACK and NACK information, the solution only extracts and uses the NACK feedback for determining miss-detection conditions, thereby reducing resource consumption while maintaining detection accuracy.
Solution Approach 2:
The patent applies partial action by using only the necessary part of HARQ feedback (NACK feedback) rather than the complete feedback mechanism. This partial approach is sufficient for miss-detection determination without requiring the full HARQ feedback process, thus reducing signaling resource consumption.
2Reliability
If HARQ feedback is used for miss-detection determination, then reliability is improved, but system complexity increases
Solution Approach 1:
The patent extracts only the necessary NACK feedback component from the complex HARQ feedback mechanism for miss-detection determination. This extraction simplifies the system by removing unnecessary feedback processing while maintaining the reliability benefit of having feedback-based detection.
Solution Approach 2:
The solution uses partial HARQ feedback (only NACK) instead of full HARQ feedback, reducing the complexity of feedback processing while still providing reliable miss-detection determination. This partial approach avoids the excessive complexity of complete HARQ feedback mechanisms.
Data Source
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AI summary
A miss-detection determination method, a terminal and a network device are provided. The miss-detection determination method includes: sending a target sequence or signal to a network device in an uplink grant-free transmission occasion; determining that no miss-detection occurs in the network device in a case that miss-detection indication information is received from the network device within a preset time period after sending the target sequence or signal, otherwise, determining that miss-detection occurs in the network device.