Calculators » Wireless and Cellular » GSM C1 and C2 Calculator: Formulas and Examples

GSM C1 and C2 Calculator: Formulas and Examples

gsm c1 c2 cell selection cell reselection

This page covers the GSM C1 calculator and GSM C2 calculator. It details the GSM C1 Formula and GSM C2 Formula. The C1 and C2 parameters are used in GSM cell selection and reselection, respectively.

GSM C1 & C2 Calculator

Inputs

Outputs

Here’s an example illustrating how to calculate C1 and C2:

Inputs:

  • Rx Level (Average) = -85 dBm
  • Rx Level (Access min) = -100 dBm
  • CRO (Cell Reselect Offset) = 6 dB
  • TO (Temporary Offset) = 3 dB
  • Penalty time = (0 or 1)

Outputs:

  • C1 = 15
  • C2 = C1 - CRO = 9 (When Penalty time is not reached, i.e., Penalty time = 0)
  • C2 = C1 + CRO - TO * H(PT-T) (When Penalty time is reached, i.e., Penalty time = 1)
  • C2 = 15 + 6 - 3 = 18

GSM C1 Formula and GSM C2 Formula

The following equations are used for GSM C1 and C2 calculation:

C1 is also known as the Path loss criterion parameter. It’s primarily used for cell selection and reselection.

GSM C1 Formula

The path loss criterion is considered satisfied when C1 > 0.

The C2 factor is used as a reselection criterion, and it is employed exclusively for cell reselection.

GSM C2 Formula