Polar-Coded HARQ Rate Splitting for Adaptive Bit Repetition
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently determining a retransmission configuration for polar coded Hybrid Automatic Repeat Request (HARQ) at run-time, particularly in adapting to varying channel conditions and optimizing bit repetition based on channel capacity information.
Innovation Solution
The implementation of a method that determines an optimal number of bits to repeat in subsequent transmissions using channel capacity information, employing prediction networks or neural networks to calculate an optimal code rate for retransmissions, and applying polar encoding with bit relocation to improve transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If polar coded HARQ uses fixed retransmission configuration, then device complexity is reduced, but adaptability to varying channel conditions deteriorates
Solution Approach 1:
The patent applies dynamics by making the retransmission configuration adaptive rather than fixed. The transmitter determines the number of bits to repeat dynamically based on channel capacity information received from the receiver, allowing the system to adapt to varying channel conditions while maintaining manageable complexity through automated feedback-based decision making
Solution Approach 2:
The patent implements feedback mechanisms where the receiver measures channel capacity information and sends this information back to the transmitter. This feedback loop enables the transmitter to optimize retransmission configuration based on actual channel conditions, resolving the contradiction between adaptability and complexity by using structured feedback to guide dynamic configuration decisions
2Reliability
If more bits are repeated in retransmission, then transmission reliability is improved, but loss of time increases due to extended retransmission duration
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the number of bits to repeat based on channel capacity information. Instead of using a fixed or maximum repetition count, the system modifies this parameter according to measured channel conditions, achieving optimal balance between reliability improvement and time consumption by matching repetition level to actual channel needs
3Manufacturing precision
If optimal code rate calculation uses complex prediction networks, then manufacturing precision of communication performance is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by enabling the communication system to automatically determine optimal code rates using channel capacity information and prediction networks. The system serves itself by using measured channel conditions to guide coding decisions without requiring external optimization, achieving precise code rate selection while keeping implementation complexity manageable through automated self-optimization
Data Source
AI summary
Wireless communications systems and methods related to hybrid repeat request (HARQ) with rate splitting are provided. A first wireless communication device communicates, with a second wireless communication device, a first communication signal including a plurality of information bits. The first wireless communication device determines a number of bits in the plurality of information bits to be repeated in a second communication signal based on channel capacity information. The first wireless communication device communicates, with the second wireless communication device, the second communication signal including the plurality of information bits and a repetition of a subset of the plurality of information bits, where the subset of the plurality of information bits includes the determined number of bits.