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Independent Communications Authority of South Africa Pinmill Farm, 164 Katherine Street, Sandton
Private Bag X10002, Sandton, 2146
Quality of Service Report:
Gauteng 2012
Quarter 2
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1. Introduction
1.1 Executive Summary
In Quarter 2 the Authority conducted Quality of Service (QoS) monitoring of the GSM Telephony service
offered by Cell‐C, MTN and Vodacom in the Gauteng region. The Monitoring period commenced on
18/07/2012 and concluded on 27/08/2012 and was limited to East Rand, West Rand, Midrand, Vaal
Triangle and Pretoria.
QoS is defined as the collective effect of service performances which determine the degree of
satisfaction of a user of the service. QoS provides an indication of what the customer experiences when
using the mobile network and is evaluated in terms of retainability and accessibility. Retainability is
defined as the ability for a call to stay connected, complete through to a normal call tear down process,
without abnormally disconnecting on a cell site of interest1. Accessibility is defined as the percentage of
time a user is rejected due to the unavailability of system resources when attempting to place a
call2.The KPI parameters used to measure retainability and accessibility were Drop Call Rate (DCR) and
Call Setup Success Rate (CSSR), respectively. THE DCR parameter is regulated by the End‐User and
Subscriber Service charter regulations of 2009 whilst the CSSR parameter is not regulated by End‐User
and Subscriber Service charter regulations of 2009; however, it has been incorporated as per ITU
recommendations E.800 and G.1000.
2. Results and Analysis
The summary of the operators’ overall performance arising from the specific quality of service
parameters and the measured data is shown in tables 1 and 2 below:
Table 1: Accessibility Measurement Data
Region Network Operator
CSSR Target (%)
Gauteng Vodacom 99.13% 95%
MTN 95.06% 95%
Cell‐C 97.53% 95%
1 Annexure B.2 of ETSI EG 202 057-3 2 GSM 12.04, ETS 300 615.
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Table 2: Retainability: Measurement Data
Region Network Operator
DCR Target (%)
Gauteng Vodacom 0.41% 3%
MTN 0.21% 3%
Cell‐C 0.93% 3%
2.1.1 Accessibility
Accessibility statistics for the test area are given in figure 1 below.
Figure 1: Accessibility Statistics
Based on the results above all operators are above the target. Ideally the Call setup Success Rate should
be greater than 95%.
2.1.2 Retainability
Retainability for voice is measured in terms of dropped calls. The dropped call statistics on Eastern
Cape’s network in the test area are reflected in Figure 2 below.
95
99.13
95.06
97.53
92
93
94
95
96
97
98
99
100
ICASA'starget
Vodacom MTN Cell‐C
CSSR>95%
Gauteng Call Success Set up Rate Average
ICASA's target
Vodacom
MTN
Cell‐C
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Figure 2: Retainability Statistics
The Drop Call Rate should be less than 3% over 6 months. Based on only the snapshot results of this
monitoring exercise, the operators are all above the target.
3. Conclusion
The Gauteng QoS monitoring focused on the following KPI’s; Call Set‐up Success Rate (CSSR) and
Dropped Call Rate (DCR) in the tested areas. All operators attained the QoS target in terms of
Retainability and Accessibility KPI’s.
The test methodology adopted provides a snapshot view of the operators Quality of Service, giving a
realistic picture of network performance from a user’s point of view. The drive test results do not
represent the mobile service provider's overall network performance, and is based on specified routes,
time of day and particular type of handset.
3
0.32 0.25 0.560
0.5
1
1.5
2
2.5
3
3.5
ICASA'starget
Vodacom MTN Cell‐C
DCR<3%
Gauteng Drop‐Call Rate Average
ICASA's target
Vodacom
MTN
Cell‐C
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4. Appendix A (coverage maps)
Gauteng: Maps of Signal Level Retainability
(i) West Rand Route
Vodacom MTN Cell‐C
Figure 3: West Rand Route maps
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(ii) East Rand
Vodacom MTN Cell‐C
Figure 4: East Rand maps
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(iii) Midrand
Vodacom MTN Cell‐C
Figure 5: Midrand maps
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(iv) Vaal Triangle
(a) Vereeniging – Sasolburg
Vodacom MTN Cell‐C
Figure 6: Vereeniging – Sasolburg maps
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(b) Sasolburg ‐ Vereeniging
Vodacom MTN Cell‐C
Figure 7: Sasolburg – Vereeniging maps
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(v) Pretoria
Vodacom MTN Cell‐C
Figure 8: Pretoria maps
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Accessibility
(I) West Rand Route
Vodacom MTN Cell‐C
Figure 9: West Rand Route maps
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(ii) East Rand
Vodacom MTN Cell‐C
Figure 10: East Rand maps
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(iii) Midrand
Vodacom MTN Cell‐C
Figure 11: Midrand maps
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(iv) Vaal Triangle
(a) Vereeniging – Sasolburg (R59 FREEWAY)
Vodacom MTN Cell‐C
Figure 12: Vereeniging – Sasolburg (R59 FREEWAY) maps
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(b) Sasolburg R59 FREEWAY ‐ Vereeniging
Vodacom MTN Cell‐C
Figure 13: Sasolburg R59 FREEWAY– Vereeniging maps
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(v) Pretoria
Vodacom MTN Cell‐C
Figure 14: Pretoria maps
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