Polar Code Frozen Bit Correlation for URLLC Error Check Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing wireless communication systems, particularly in the 5G URLLC scenario, face challenges in achieving high error check precision without increasing the number of CRC bits, which affects transmission efficiency due to the smaller amount of data being transmitted.
Innovation Solution
The method involves using polar codes with a correlation parameter group that includes time-frequency resources, the number of bits in the information block, and scrambling sequences to improve error check precision without increasing the CRC length, by determining the values of frozen bits in the second bit block based on these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of CRC bits is increased to improve error check precision, then error check precision is improved, but transmission efficiency deteriorates due to excessive redundancy
Solution Approach 1:
The patent changes the parameters of frozen bits in polar codes by making their values correlated with transmission parameters (time-frequency resource, number of information bits, scrambling sequence). This allows the system to improve error check precision through parameter optimization rather than increasing CRC bit length, thus resolving the contradiction between error check precision and transmission efficiency.
2Measurement precision
If the number of CRC bits is increased to improve error check precision, then error check precision is improved, but device complexity increases
Solution Approach 1:
Instead of increasing CRC bit length, the patent optimizes the system by changing the values of frozen bits in polar codes to be correlated with transmission parameters. This approach improves error check precision while avoiding the complexity increase that would result from larger CRC codes or more complex error checking mechanisms.
3Measurement precision
If frozen bit values are made correlated with transmission parameters, then error check precision is improved without increasing CRC length, but device complexity increases
Solution Approach 1:
The patent implements parameter changes in a systematic way by establishing correlations between frozen bit values and transmission parameters (time-frequency resource, number of information bits, scrambling sequence). This approach improves error check precision while keeping the implementation complexity manageable through structured parameter relationships rather than arbitrary complex coding schemes.
Data Source
AI summary
A method and a device in a UE and a base station for wireless communication are provided. A first node performs a first channel coding and transmits a first radio signal. First channel coding is based on a polar code, an input of which comprises a first information bit block and a first check bit block corresponded to an information bit block comprising the first information bit block, and an output of which generates first radio signal and related to a second bit block, values of bits comprised in the second bit block are related to a correlation parameter group comprising at least one of a time-frequency resource occupied by first radio signal, a number of bits comprised in first information bit block, or a first scrambling sequence. First scrambling sequence generates the first check bit block. The method improves precision of error check without increasing CRC length.