Polar Code HARQ Retransmission Using Puncturing Thresholds

The patent segments the mother code bits into different groups based on their channel error probabilities. Instead of retransmitting all original information bits uniformly, the system selectively retransmits specific bit groups (e.g., bits with higher error probabilities) to improve decoding performance while maintaining operational simplicity.

The patent applies local quality by differentiating the treatment of different bit positions in the code. Bits are sorted according to their reliability metrics, and retransmission decisions are made based on local characteristics of each bit group rather than uniform retransmission, thereby optimizing decoding performance.

The patent performs preliminary sorting and classification of mother code bits based on channel error probabilities before retransmission. This preliminary action allows the system to pre-identify which bits require retransmission, reducing the complexity during the actual retransmission process and making the selection mechanism more manageable.

The patent changes the parameter of bit selection from uniform selection to selective selection based on error probability thresholds. By introducing parameter-based selection criteria, the system achieves better decoding performance while controlling complexity through threshold-based decision making rather than complex optimization algorithms.