SSB-to-PRACH Occasion Mapping for Faster 5G NR Selection

The patent pre-calculates and stores the mapping relationships between SSB time domain positions and PRACH transmission occasions in a lookup table during system initialization. When determining the target PRACH transmission occasion, the UE directly queries the pre-stored mapping table based on the selected SSB index, eliminating the need for real-time screening calculations and significantly reducing determination time while maintaining accuracy.

The patent creates a simplified copy of the complex mapping relationships by storing them in a lookup table structure. Instead of performing complex screening calculations on the original conditions, the system uses a pre-generated copy of the mapping data that can be quickly queried, thereby reducing computational complexity while preserving the essential mapping information needed for accurate PRACH occasion determination.

The patent moves the complex screening calculation logic from runtime operation to initialization phase. By pre-calculating the mapping relationships and storing them in a lookup table, the baseband chip does not need to implement complex real-time calculation algorithms, thereby reducing device complexity while maintaining determination accuracy through direct table lookup.

The patent replaces complex calculation logic with a simplified data structure (lookup table) that stores pre-computed mapping relationships. This copying approach allows the system to avoid implementing complex screening algorithms in the baseband chip, reducing device complexity while preserving accurate determination capability through direct querying of the stored mapping data.