PBCH Synchronization Using CRC and Polar Encoding in 5G NR
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Solution Overview
Problem
Current mobile communication systems, particularly in 5G New Radio (NR) technology, face challenges in error check-based synchronization and broadcasting, where existing methods lack efficiency in conveying additional information through synchronization signals and broadcast channels, leading to potential errors and reduced reliability.
Innovation Solution
The implementation of error check-based synchronization using secondary synchronization signals (SSS) and Physical Broadcast Channels (PBCH) encoded with Polar codes, incorporating cyclic redundancy check (CRC) bits and waveform-based error checking, along with reference signals for enhanced data integrity and synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If additional information is provided through SSS and PBCH in 5G NR, then the quantity of transmitted information increases, but the reliability of transmission deteriorates due to potential errors
Solution Approach 1:
The patent implements error checking mechanisms where the transmitter sends data through SSS and PBCH channels, and the receiver performs verification to detect and correct errors, creating a feedback loop that ensures reliable information transmission despite channel impairments
Solution Approach 2:
The patent applies preliminary error prevention measures by encoding data with error correction codes before transmission through SSS and PBCH, and attaching reference signals in advance to enable subsequent error detection and correction operations
2Reliability
If error checking mechanisms are implemented in synchronization signals and broadcast channels, then transmission reliability improves, but system complexity increases
Solution Approach 1:
The patent extracts error checking functionality into separate, dedicated components such as reference signals and error correction code structures, allowing the main synchronization and broadcast functions to remain simple while reliability is enhanced by the specialized error checking modules
Solution Approach 2:
The patent segments the transmission system into distinct functional blocks: synchronization signal generation, error correction encoding, reference signal insertion, and error checking at the receiver, allowing each segment to be optimized independently for both simplicity and reliability
Data Source
AI summary
Systems, methods, and instrumentalities are disclosed for error check-based synchronization. Physical Broadcast Channel (PBCH) data may be determined. A scrambling (e.g., a first scrambling) of the PBCH data may be scrambled via a sequence (e.g., a first sequence). The first sequence may be based on a cell ID and/or timing information. Error check bits may be attached to the scrambled PBCH data and to the timing information. The error check bits may include one or more cyclic redundancy check (CRC) bits. The scrambled PBCH data, the timing information (e.g., the unscrambled timing information), and/or the attached error check bits may be polar encoded. The polar encoding may result in polar encoded bits. A scrambling (e.g., a second scrambling) of the polar encoded bits may be scrambled via a sequence (e.g., a second sequence). The first sequence and the second sequence may be different. The polar encoded bits may be transmitted.