5G Cell Camping Selection via PBCH and RMSI Decoding

The patent applies preliminary action by performing receive beam sweeping and obtaining candidate cell lists before the actual cell camping decision. The UE pre-processes multiple cells by decoding PBCH and obtaining RMSI in advance, creating a prepared list of candidate cells with known signal quality metrics. This preliminary preparation allows the UE to quickly select from pre-evaluated cells during camping, avoiding time-wasting sequential decoding of unstable cells and improving both success rate and reducing delay.

The patent applies partial action by decoding PBCH and obtaining RMSI for multiple candidate cells in advance during receive beam sweeping, but then selecting only the best cell from this pre-prepared list for actual camping. The UE performs excessive preliminary decoding on multiple cells to ensure quality, but limits the final camping attempt to a single selected cell. This approach improves success rate through thorough preliminary evaluation while maintaining productivity by avoiding multiple retry attempts.

The patent applies segmentation by dividing the cell evaluation process into distinct stages: first decoding PBCH to obtain basic cell information and signal metrics, then obtaining RMSI for additional system information, and finally selecting the best cell from this segmented evaluation. The UE segments the candidate cell list into evaluated and unevaluated portions, processing cells in stages rather than all at once. This segmented approach improves selection accuracy through multi-stage evaluation while reducing complexity by managing the process in organized steps.