UE Redundancy Version Feedback for Efficient Code Block Retransmission
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Solution Overview
Problem
Wireless communication systems face inefficiencies in retransmitting data due to the inability of user equipment (UE) to successfully decode received code block groups, leading to increased complexity and latency, as current methods rely on predefined redundancy versions that may not accurately address decoding failures.
Innovation Solution
The UE transmits an indication of a requested redundancy version, based on incremental redundancy buffer status or negative acknowledgement, to the base station, allowing for more precise retransmissions and improving decoding success.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If predefined redundancy versions are used for retransmission, then the base station can systematically manage retransmissions, but the UE may still fail to decode due to mismatch between predefined versions and actual decoding needs
Solution Approach 1:
The UE provides feedback information to the base station indicating its incremental redundancy buffer status, enabling the base station to select an appropriate redundancy version for retransmission that matches the UE's decoding requirements, thereby improving decoding success rate while reducing unnecessary retransmissions
Solution Approach 2:
The UE prepares and reports its redundancy buffer status before the retransmission occurs, allowing the base station to pre-select the optimal redundancy version and schedule the retransmission efficiently, reducing latency while ensuring decoding success
2Productivity
If the UE requests specific redundancy versions based on buffer status, then retransmission efficiency improves, but the feedback message complexity increases
Solution Approach 1:
The feedback information is segmented into discrete buffer status indicators that map to specific redundancy version preferences, allowing the base station to efficiently interpret the UE's needs without requiring complex feedback messages
Solution Approach 2:
The UE changes the parameter of buffer status indication to convey redundancy version preferences, transforming complex decoding state information into simplified buffer status parameters that are easy to transmit and interpret
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.