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1- What is PCI? A physical‑layer cell identity used by UE during cell search and synchronization; it’s derived from PSS/SSS in the SSB burst.
2- Ranges and formula: NID(1)N_{\text{ID}}^{(1)} from SSS ∈ [0,335], NID(2)N_{\text{ID}}^{(2)} from PSS ∈ {0,1,2}, and PCI ∈ [0,1007], with PCI=3NID(1)+NID(2)\text{PCI} = 3N_{\text{ID}}^{(1)} + N_{\text{ID}}^{(2)}.
January 31, 2026