Polar-Code CRC Combining for Low-Overhead Control Decoding
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Solution Overview
Problem
Current wireless communication networks face challenges in efficiently transmitting control information due to high cyclic redundancy check (CRC) overhead, which affects the reliability and error correction capabilities of polar codes in future wireless communication networks beyond LTE.
Innovation Solution
The implementation of polar coding techniques that combine CRC information, where the number of CRC bits is optimized based on the list size for successive-cancellation list (SCL) decoding, reducing CRC overhead and improving error correction performance by jointly decoding and verifying control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional CRC overhead is used for control information transmission, then error detection capability is maintained, but transmission efficiency deteriorates due to high CRC overhead
Solution Approach 1:
The patent combines CRC bits for control information with CRC bits for data transmission into a unified CRC structure. By merging these previously separate CRC functions into a single integrated system, the patent reduces the total number of CRC bits required while maintaining both control information verification and data error detection capabilities, thereby improving transmission efficiency without sacrificing reliability
Solution Approach 2:
The patent creates a universal CRC structure that serves multiple functions simultaneously: it verifies control information integrity and detects data transmission errors. This multi-functional CRC design allows a single set of CRC bits to perform what previously required separate CRC mechanisms, reducing overhead while maintaining comprehensive error detection and verification capabilities
2Reliability
If more CRC bits are added to improve error correction, then reliability improves, but CRC overhead increases reducing transmission efficiency
Solution Approach 1:
The patent merges control information CRC requirements with data error correction CRC requirements into a single unified CRC structure. This combination allows the system to achieve both control verification and data error correction using a shared set of CRC bits, optimizing the balance between reliability and transmission efficiency by eliminating redundant CRC overhead
Solution Approach 2:
The patent optimizes the number of CRC bits by changing the parameters of the CRC polynomial and the structure of the CRC calculation to serve dual purposes. By adjusting these parameters, the system achieves adequate error correction capability for both control information and data without requiring the maximum number of CRC bits that would reduce transmission efficiency
Data Source
AI summary
Aspects of the disclosure relate to wireless communication systems configured to provide techniques for polar coding control information together with combined cyclic redundancy check (CRC) information. The combined CRC information may include a number of CRC bits selected to jointly decode and verify the control information to reduce the CRC overhead.