Implicit CBG Confirmation Bit for 5G Signaling Overhead Reduction
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Solution Overview
Problem
Current 5G wireless communication systems face high signaling overhead when indicating failed code block groups, leading to reduced throughput and increased latency due to explicit re-transmission signaling in the downlink control channel.
Innovation Solution
Implementing implicit signaling using a single CBG confirmation bit to indicate re-transmitted code block groups, reducing the need for explicit bit mapping and thereby minimizing signaling overhead in the downlink control channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If explicit bit mapping is used to indicate failed code block groups, then re-transmission accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential information needed for re-transmission indication by using a single CBG confirmation bit per code block group, rather than transmitting complete bit mappings. This selective extraction maintains the necessary re-transmission accuracy while dramatically reducing the signaling overhead from potentially dozens of bits per transport block to just one bit per CBG.
Solution Approach 2:
Instead of explicitly indicating which code block groups failed through detailed bit mapping, the patent inverts the approach by using a confirmation bit that implicitly indicates re-transmission status. The CBG confirmation bit set to a first value indicates that the code block group should be re-transmitted, simplifying the signaling mechanism while maintaining functional equivalence.
2Reliability
If explicit re-transmission signaling is used in the downlink control channel, then reliability is improved, but latency increases
Solution Approach 1:
The patent extracts only the critical re-transmission indication information, removing unnecessary detailed bit mapping overhead. This extraction maintains reliability by preserving the essential re-transmission confirmation signal while reducing latency by eliminating redundant signaling bits that would increase transmission time and processing overhead.
Solution Approach 2:
The patent changes the signaling parameter from extensive bit mappings to a compact single-bit confirmation approach. This parameter change maintains the reliability function by preserving the re-transmission indication capability while reducing the time required for signal processing and transmission, thereby decreasing latency.
3Productivity
If code block group-based transmission is implemented, then throughput is improved, but signaling complexity increases
Solution Approach 1:
The patent extracts the essential re-transmission indication from the complex bit mapping structure, retaining only the critical CBG confirmation bit. This extraction maintains the throughput benefits of code block group-based transmission by preserving the granular re-transmission capability while dramatically simplifying the signaling complexity from multiple bits per CBG to a single confirmation bit.
Data Source
AI summary
Facilitating notifications to indicate failed code block groups is provided herein. A method can comprise determining a value of a confirmation bit received in a transmission based on a first determination that a new data indicator is set to a null indication and performing an action from a group of actions. The group of actions can comprise decoding a first group of code block groups of the code block groups based on a second determination that the value of the confirmation bit for the first group of code block groups is a first value. The group of actions can also comprise decoding the code block groups based on a third determination that the value of the confirmation bit for the code block groups is set to a second value and sending a report indicating at least one of the code block groups for which the transmission failed.