Code Block Feedback for Wireless Retransmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in code block regrouping during retransmissions in 5G NR systems, leading to suboptimal use of physical layer resources and increased power consumption due to the need to retransmit entire code block groups upon decoding failures.
Innovation Solution
Implementing a method for reassigning code blocks to different code block groups based on the total number of failed code blocks and the maximum number of code block groups per transport block, allowing for more targeted and efficient retransmissions by configuring retransmissions based on the re-assigned blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If code block groups are retransmitted upon decoding failures, then reliability is improved, but power consumption increases and resource efficiency deteriorates
Solution Approach 1:
The patent segments the code block group into individual code blocks and identifies only the failed ones for retransmission. Instead of retransmitting the entire code block group, the system segments the feedback mechanism to provide granular acknowledgment at the code block level, enabling selective retransmission and reducing unnecessary power consumption.
Solution Approach 2:
The patent changes the feedback parameter from group-level acknowledgment to code block-level acknowledgment. By modifying the granularity of the feedback parameter, the system enables more precise identification of failed code blocks, allowing retransmission only of necessary portions and optimizing power usage while maintaining reliability.
2Reliability
If entire code block groups are retransmitted, then reliability is improved, but resource efficiency deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the code block group into individual code blocks and identifying only the failed ones. This segmentation enables selective retransmission of only the necessary code blocks rather than the entire group, improving resource efficiency while maintaining decoding success rate.
Solution Approach 2:
The patent extracts only the failed code blocks from the code block group for retransmission. By taking out only the necessary portions that require retransmission rather than the entire group, the system optimizes resource utilization and improves productivity.
3Productivity
If code block level feedback is implemented, then resource efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic feedback mechanisms that adapt to the decoding status of individual code blocks. The feedback structure dynamically adjusts based on which code blocks failed, enabling efficient resource utilization while managing complexity through adaptive rather than static feedback protocols.
Solution Approach 2:
The patent introduces code block-level feedback to enable precise identification of failed code blocks. This feedback mechanism provides the necessary information for selective retransmission, improving resource efficiency while the complexity is managed through standardized feedback protocols.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a transmission comprising an indication of at least one failed code block group in a plurality of code block groups, wherein a code block group comprises a plurality of code blocks, re-assign code blocks to different code block groups (CBGs) according to a total number of code blocks (CBs) across the at least one failed code block group (CBG) and a maximum number of code block groups (CBGs) per a transport block (TB), and configure a retransmission based on the re-assigned code blocks (CBs).