Redundancy Version Feedback for Precise Code Block Retransmission
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in retransmission processes due to the inability of user equipment (UE) to effectively communicate a desired redundancy version for code block groups, leading to increased complexity, latency, and network retransmissions.
Innovation Solution
The UE transmits an indication of a redundancy version in conjunction with feedback information, allowing the base station to adjust retransmissions accordingly, thereby improving decoding success and reducing network overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE does not transmit redundancy version indication with feedback information, then the feedback transmission is simpler, but the retransmission efficiency decreases and network overhead increases
Solution Approach 1:
The patent combines the redundancy version indication with the feedback information transmission by merging them into a single uplink message. The UE transmits both the feedback (ACK/NACK) and the redundancy version indication together in one transmission event, eliminating the need for separate signaling and reducing overall feedback transmission complexity while enabling efficient retransmission.
Solution Approach 2:
The patent introduces an intermediary mechanism where the redundancy version indication is embedded within the existing feedback information structure. This intermediary approach allows the base station to obtain both the decoding status and the desired redundancy version without requiring separate dedicated signaling channels, thus improving retransmission efficiency while maintaining manageable complexity.
2Measurement precision
If the UE transmits redundancy version indication with feedback information, then the retransmission precision improves, but the uplink transmission overhead increases
Solution Approach 1:
The patent merges the redundancy version indication with the feedback information into a single unified transmission. By combining these two elements that were previously transmitted separately (or implied), the patent achieves precise retransmission control without proportionally increasing overhead, as the combined message leverages existing uplink resources and structures.
Solution Approach 2:
The patent changes the parameter structure of the feedback information by adding the redundancy version indication as an additional parameter field within the existing feedback message framework. This parameter change enables precise retransmission control while maintaining compatibility with existing uplink transmission protocols and resource allocations, thus avoiding exponential overhead increase.
3Reliability
If the base station uses fixed retransmission redundancy version, then the base station operation is simpler, but the decoding success rate at UE decreases
Solution Approach 1:
The patent implements a feedback mechanism where the UE provides the base station with its desired redundancy version indication along with the feedback information. This feedback loop enables the base station to adapt its retransmission strategy based on actual UE needs, significantly improving decoding success rate. The base station simply follows the UE's indication, keeping its operation relatively simple while achieving high reliability.
Solution Approach 2:
The patent introduces dynamics into the retransmission process by allowing the redundancy version to be adjusted based on real-time feedback from the UE. Instead of a static fixed redundancy version approach, the system dynamically adapts the retransmission parameters according to the UE's decoding status and preferences, thereby improving decoding success rate while maintaining manageable base station complexity through automated UE-driven control.
Data Source
AI summary
Methods, systems, and devices for reporting redundancy version with feedback information. are described. A user equipment (UE) may transmit, to a base station, feedback information corresponding to a code block group in conjunction with an indication of a redundancy version for retransmission of the code block group. The UE may monitor for the retransmission of the code block group based on the indication of the redundancy version for the retransmission of the code block group. The UE may then decode the retransmission of the code block group based on the monitoring and the redundancy version for the retransmission of the code block group.