什么是小区搜索（Cell Search）？

Cell search is the procedure by which a UE acquires time and frequency synchronization with a cell and detects the Cell ID of that cell. NR cell search is based on the primary and secondary synchronization signals, and PBCH DMRS, located on the synchronization raster.

小区搜索程序

1. UE调整到合适频率
2. UE检测PSS/SSS
3. UE检测PBCH
4. UE解MIB，根据获得的信息解SIB1和OSI