Cell ID (LTE)

Default: Auto

Range: Auto, Manual: 0-503

Cell ID 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 Cell ID is set to Auto, the demodulator will automatically detect the Cell ID. When Cell ID is set to Manual, 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

When Sync Type is set to C-RS, the Cell ID Auto selection will be disabled, and Cell ID must be specified manually. This is because the demodulator needs to know the values of the C-RS Cell-specific RS sequence to use for synchronization and because Cell ID determines these values. See RS-PRS for more information.

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 Primary Synchronization Signal (P-SS Primary Synchronization Signal):

Cell ID sector 0 = ZC Root Index 25
Cell ID sector 1 = ZC Root Index 29
Cell ID sector 2 = ZC Root Index 34

Normally, the same sequence used to generate P-SS is used to generate C-RS, but a custom C-RS can be used by setting RS-PRS to Custom.