The following are Quality of Service (QoS) Key Performance Indicators (KPIs) based on data collected from the Network Operating Centres (NOCs) of the nation's major mobile network operators (MNO). The data is collected during busy hours at the Base Station Controller (BSC) level and analyzed using monthly weighted averages to ascertain each operator's performance.
For definitions of the various QoS Metrics for measurement of KPIs, see the QoS Metrics & Definitions tab on the Quality of Service (QoS) Page.
Last Update: September 9, 2022
GSM
GSM QoS KPI Nationwide & State Level Data
The following graphs and tables detail the monthly recorded Quality of Service (QoS) KPIs of Nigeria's operating GSM mobile networks i.e. Airtel, 9mobile (formerly Etisalat), Globacom and MTN, on a nationwide and state-by-state basis.
Use the form below or click on a state to reveal the QoS KPI data and trendlines per each state, operator and month.
NOTE: Data points that fall within the target threshold region indicate a failure to meet the QoS KPI target for the relevant month.
| Airtel Data | |
|---|---|
| CSSR | |
| DCR | |
| SDDCH | |
| TCCH | |
| 9mobile Data | |
|---|---|
| CSSR | |
| DCR | |
| SDDCH | |
| TCCH | |
| Globacom Data | |
|---|---|
| CSSR | |
| DCR | |
| SDDCH | |
| TCCH | |
| MTN Data | |
|---|---|
| CSSR | |
| DCR | |
| SDDCH | |
| TCCH | |
Call Setup Success Rate (CSSR)
The Call Setup Success Rate (CSSR) is calculated by taking the number of the unblocked call attempts divided by the total number of call attempts. A call setup is an exchange of signaling information in the call process that leads to Traffic Channel (TCH) seizure.
Performance Threshold: The CSSR should be equal to or greater than 98%.
| CSSR(%) = | Number of Unblocked Call Attempts | × 100 |
| Total Number of Call Attempts |
Dropped Call Rate (DCR)
The Dropped Call Rate (DCR) - also called Call Drop Rate - is the number of dropped calls divided by the total number of call attempts. A dropped call is a call that is prematurely terminated before being released normally by either the caller or called party (i.e., the call is dropped before the exchange of Released Message "RL_M" and Released Complete Message "RLC_M" in the signaling flow).
Performance Threshold: The DCR should be equal to or less than 1%.
| DCR(%) = | Number of Prematurely Terminated Calls | × 100 |
| Total Number of Call Attempts |
Standalone Dedicated Control Channel Congestion (SDCCH)
The Standalone Dedicated Control Channel Congestion Rate is defined as the probability of failure of accessing a Standalone Dedicated Control Channel (SDCCH) during call set up. The SDCCH is used in the GSM system to provide a reliable connection for signalling and SMS (Short Message Service) messages.
Performance Threshold: The SDCCH Congestion Rate should be equal to or less than 0.2%.
| SDCCH(%) = | Number of Assignment Related Connect Fails | × 100 |
| Mobile Originating Call Attempts |
Traffic Control Channel Congestion Rate (TCCH)
The Traffic Control Channel Congestion Rate is the probability of failure of accessing a traffic channel during call setup. Traffic Control Channels (TCCH) are responsible for transferring control information between mobiles and the BTS.
Performance Threshold: The TCCH Congestion Rate should be equal to or less than 2%.
| TCCH(%) = | Number of Call Connect Fails | × 100 |
| Total Number of Call Attempts |