5G NR Cell Identity (NCI) Calculator
In 5G NR, the NCI is a 36-bit identity to identify a 5G gNB and its local cell id.
Constraints:
- The NR gNB id can be from 22-32 bits in length
- Corresponding Local cell id would be 14 to 4 bits
- The full NCI (gNB+CI) is 36 bits (0 to 68719476735)
- Max gNB Id with 32 bits: 0 to 4294967295
- Max CellId with 14 bits: 0 to 16383
calculate Calculate NCI from gNB ID
settings_ethernet Decode NCI to gNB ID
info About 5G NR Cell Identity
The NR Cell Identity (NCI) is a crucial identifier in 5G networks that uniquely identifies a cell within a gNodeB. It's composed of two parts:
- gNB ID: Identifies the gNodeB (22-32 bits)
- Cell ID: Identifies the cell within the gNodeB (remaining bits to make total 36 bits)
The NCI is used in various network procedures including handovers, cell selection/reselection, and mobility management. The flexible bit allocation allows network operators to design their addressing schemes according to deployment needs.
Example Calculation
For gNB ID length = 25 bits, gNB ID = 21001, Cell ID = 1:
NCI = (gNB ID << (36-25)) | Cell ID = 7638827009