Cell ID (NB-IoT)
Auto
Auto, Manual: 0-503
sets the physical (PHY Physical Layer) layer Cell ID. This PHY-layer Cell ID determines the Cell ID Group and Cell ID Sector. There are 168 possible Cell ID groups and 3 possible Cell ID sectors; therefore, there are 3 * 168 = 504 possible PHY-layer cell IDs. When is set to , the demodulator will automatically detect the Cell ID. When is set to , the PHY-layer Cell ID must be specified for successful demodulation.
The physical layer cell id can be calculated from the following formula:
PHY-layer Cell ID = 3*(Cell ID Group) + Cell ID Sector
Cell ID Sector and Group information can be found on the Error Summary trace.
Cell ID Sector determines the Zadoff-Chu Root Index used to generate the Narrowband Primary Synchronization Signal (NPSS):
- Cell ID sector 0 = ZC Root Index 25
- Cell ID sector 1 = ZC Root Index 29
- Cell ID sector 2 = ZC Root Index 34
See Also
