Calculators » Wireless and Cellular » GSM KPI Formula and Calculator: Understanding CSSR

GSM KPI Formula and Calculator: Understanding CSSR

gsm kpi cssr call success rate network performance

This page explains the GSM KPI formula and GSM CSSR formula. It also introduces a GSM KPI calculator for calculating the CSSR value.

KPI stands for Key Performance Indicator.

CSSR stands for Call Setup Success Rate.

The following KPI parameters are commonly used in GSM networks:

  • CSSR - Call Setup Success Rate
  • SCR (Specific Call related parameter. Needs definition)
  • Call Drop Rate
  • HOSR - Hand Over Success Rate
  • SDCCH Block Rate
  • TCH Assignment Block Rate
  • TCH Assignment Failure Rate (Excluding Blocking)
  • EMD - Erlang Minute per Drop

CSSR represents the rate of calls that successfully reach TCH (Traffic Channel) assignment.

Equation/Formula used in GSM KPI or CSSR calculator

Inputs

Outputs

The following equation or formula is used for this GSM KPI/CSSR calculator.

GSM KPI CSSR formula