HARQ Feedback Encoding for Adaptive Retransmission Parameters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current CBG methods in wireless communication systems are inefficient and unreliable for ultra-reliable low-latency communication (URLLC) due to high control overhead and limited reliability improvements, especially in varying communication environments.
Innovation Solution
Implementing a feedback mechanism where a node sends a message indicating both a detection result and additional information for setting parameters in subsequent transmissions, using an M-bit binary value to enhance flexibility and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-bit HARQ feedback is used to indicate transmission correctness, then the feedback mechanism is simple, but the transmission rate decreases due to limited messaging on receive state
Solution Approach 1:
The patent combines multiple feedback functions into a single feedback message. The feedback message includes both the detection result (ACK/NACK) and additional information about channel conditions, combining what would traditionally require separate messages into one unified feedback structure.
Solution Approach 2:
The feedback message is designed to serve multiple purposes: indicating detection result, providing channel quality information, and guiding subsequent transmission parameter selection. This multi-functional feedback replaces the need for separate single-bit ACK/NACK and separate channel quality reports.
2Productivity
If CBG transmission method is used to support multi-bit HARQ feedback, then transmission efficiency increases, but control overhead becomes large
Solution Approach 1:
The patent extracts only the essential feedback information needed for efficient retransmission without requiring full CBG-level granularity. Instead of providing detailed status for each code block group, the feedback provides aggregated detection results and essential channel information, reducing control overhead while maintaining transmission efficiency.
Solution Approach 2:
The feedback provides partial information about the transport block reception status rather than complete detailed status. This partial feedback approach is sufficient for the transmitter to make informed retransmission decisions without incurring the full overhead of complete CBG-level feedback.
3Quantity of substance
If CBG transmission is used to reduce retransmission resources, then resource usage decreases, but reliability improvement for subsequent transmissions is not achieved
Solution Approach 1:
The patent implements enhanced feedback that includes not only detection results but also additional information about channel conditions and reception quality. This enriched feedback enables the transmitter to adapt subsequent transmissions with appropriate parameter adjustments, improving reliability while managing retransmission resources efficiently.
Solution Approach 2:
The system dynamically adjusts transmission parameters for subsequent transmissions based on the feedback received. The transmitter can modify modulation schemes, coding rates, and resource allocation adaptively, making the system responsive to actual channel conditions and improving reliability of subsequent transmissions.
Data Source
AI summary
This document generally relates to transmitting a feedback message from a first node to a second node, where the message indicates both a detection result of receiving at least a portion of a transport block, and addition information that indicates to the second node how to set one or more parameters for a subsequent transmission. In various embodiments, the message includes a value, such as an M-bit binary value that indicates both the detection result and the additional information.