Data on the key performance indicators for quality of service of GSM networks in Nigeria.

In this data article, the Key Performance Indicators (KPIs) for Quality of Service (QoS) of Global System for Mobile Communications (GSM) networks in Nigeria are provided and analyzed. The data provided in this paper contain the Call Setup Success Rate (CSSR), Drop Call Rate (DCR), Stand-alone Dedicated Channel (SDCCH) congestion, and Traffic Channel (TCH) congestion for the four GSM network operators in Nigeria (Airtel, Etisalat, Glo, and MTN). These comprehensive data were obtained from the Nigerian Communications Commission (NCC). Significant differences in each of the KPIs for the four quarters of each year were presented based on Analysis of Variance (ANOVA). The values of the KPIs were plotted against the months of the year for better visualization and understanding of data trends across the four quarters. Multiple comparisons of the mean-quarterly differences of the KPIs were also presented using Tukey's Post Hoc test. Public availability and further interpretation and discussion of these useful information will assist the network providers, Nigerian government, local and international regulatory bodies, policy makers, and other stakeholders in ensuring access of people, machines, and things to high quality telecommunications services.

Specifications Table

Value of the data

The mobile network providers, the Nigerian government, local and international regulatory bodies, telecommunication policy makers, and other stakeholders in the telecommunication industry in Nigeria, Africa, and the world will find the analyses of the data provided in this article to be most useful [1].

The importance of the analysis of these data is usually needful for appropriate regulations and quality assurance [2].

Researchers in both academia and telecommunication industry can further explore and interpret the data provided in this article to solve QoS-related issues in GSM networks [3], [4], [5], [6], [7], [8], [9], [10], [11], [12].

The major trends in these data and the statistical analyses will help GSM network subscribers to benchmark the services offered by the mobile network operators [13], [14], [15].

Contextual interpretation and discussion of the data will help mobile network operators to gain accurate and deep understanding of the QoS offered across the months and quarters of the year [16].

Data

Accurate radio network planning is essential for good Quality of Service (QoS) [16], [17], [18]. The Key Performance Indicators (KPIs) for QoS of Global System for Mobile Communications (GSM) networks in Nigeria presented in this article were collected from Nigerian Communications Commission (NCC). These KPIs include Call Setup Success Rate (CSSR), Drop Call Rate (DCR), Stand-alone Dedicated Channel (SDCCH) congestion, and Traffic Channel (TCH) congestion for the four GSM network operators in Nigeria (Airtel, Etisalat, Glo, and MTN). The raw data were measured during busy hours at the Base Station Controller (BSC) layer and analyzed based on monthly and quarterly mean values to gain useful insights on the QoS provided by each of the mobile network operators. The data covers KPIs that were measured monthly from January, 2014 to December, 2016.

Table 1, Table 2 present the summary of the general descriptive statistics (total number of samples, mean, median. mode, minimum, maximum, mean absolute deviation, standard deviation, first and third quartile, kurtosis, and skewness) of the dataset. In addition, Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12 show the trends of monthly variations in CSSR, DCR, SDCCH congestion, and TCH congestion for Airtel, Etisalat, Glo, and MTN throughout the three-year data coverage.

Table 1

Measure of central tendency of QoS KPIs of GSM network operators.

QoS Index	Mobile network operator	Total sample	Mean	Median	Mode	Min	Max
CSSR	Airtel	36	98.024	98.135	98.08	96.720	98.710
	Etisalat	36	99.173	99.22	99.18	98.390	99.390
	Glo	36	98.187	98.22	98.08	96.890	98.650
	MTN	36	98.300	98.55	97.12	96.850	99.080
DCR	Airtel	36	0.740	0.740	0.690	0.600	0.860
	Etisalat	36	0.547	0.530	0.540	0.270	0.860
	Glo	36	0.655	0.550	0.500	0.400	1.430
	MTN	36	0.852	0.770	0.720	0.450	1.430
SDCCH congestion	Airtel	36	0.251	0.180	0.160	0.090	0.790
	Etisalat	36	0.120	0.110	0.090	0.030	0.330
	Glo	36	0.947	0.580	0.140	0.130	2.320
	MTN	36	0.213	0.140	0.120	0.080	0.730
TCH congestion	Airtel	36	0.424	0.325	0.320	0.120	0.990
	Etisalat	36	0.229	0.190	0.190	0.080	0.980
	Glo	36	1.087	1.020	0.690	0.580	1.740
	MTN	36	0.499	0.400	0.250	0.250	1.270

Table 2

Measure of data dispersion of QoS KPIs of GSM network operators.

	Mobile network operator	Mean absolute deviation	Standard deviation	Q1	Q3	Kurtosis	Skewness
CSSR	Airtel	0.380	0.505	97.895	98.360	3.536	−1.180
	Etisalat	0.124	0.181	99.095	99.275	10.831	−2.337
	Glo	0.199	0.327	98.090	98.340	9.717	−2.276
	MTN	0.636	0.756	97.540	98.955	2.009	−0.741
DCR	Airtel	0.054	0.067	0.695	0.790	2.310	−0.085
	Etisalat	0.082	0.119	0.470	0.575	4.285	0.911
	Glo	0.190	0.232	0.500	0.820	4.913	1.411
	MTN	0.242	0.287	0.645	1.175	1.951	0.497
SDCCH congestion	Airtel	0.132	0.173	0.150	0.300	4.570	1.578
	Etisalat	0.035	0.057	0.090	0.130	8.291	2.184
	Glo	0.706	0.753	0.225	1.695	1.427	0.290
	MTN	0.121	0.165	0.120	0.225	5.534	1.861
TCH congestion	Airtel	0.183	0.240	0.275	0.480	3.281	1.111
	Etisalat	0.091	0.157	0.150	0.260	15.805	3.298
	Glo	0.324	0.372	0.745	1.480	1.651	0.303
	MTN	0.191	0.252	0.310	0.585	4.595	1.481

Fig. 1

Monthly mean CSSR for the mobile network operators in 2014.

Fig. 2

Monthly mean CSSR for the mobile network operators in 2015.

Fig. 3

Monthly mean CSSR for the mobile network operators in 2016.

Fig. 4

Monthly mean DCR for the mobile network operators in 2014.

Fig. 5

Monthly mean DCR for the mobile network operators in 2015.

Fig. 6

Monthly mean DCR for the mobile network operators in 2016.

Fig. 7

Monthly mean SDCCH congestion for the mobile network operators in 2014.

Fig. 8

Monthly mean SDCCH congestion for the mobile network operators in 2015.

Fig. 9

Monthly mean SDCCH congestion for the mobile network operators in 2016.

Fig. 10

Monthly mean TCH congestion for the mobile network operators in 2014.

Fig. 11

Monthly mean TCH congestion for the mobile network operators in 2015.

Fig. 12

Monthly mean TCH congestion for the mobile network operators in 2016.

Materials and methods

The relationships between CSSR, DCR, SDCCH congestion, and TCH congestion of Airtel, Etisalat, Glo, and MTN were estimated using linear correlation. The correlation matrices are presented in Table 3, Table 4, Table 5, Table 6. ANOVA tests were also performed for all the QoS KPIs presented in this data article to identify the differences among the quarterly-means for each of the mobile network operators. Table 7, Table 8, Table 9, Table 10 presents the ANOVA test results for CSSR, DCR, SDCCH congestion, and TCH congestion respectively. The significant differences in the quarterly-means of the QoS KPIs were further investigated based on multiple comparison using Tukey's Post Hoc test at 95% Confidence Interval. The results of the comparisons are presented in Table 11, Table 12, Table 13. The data analyzed in this article are made available in Table 14, Table 15, Table 16, Table 17, Table 18.

Table 3

Correlation matrix for CSSR.

Mobile network operator	Airtel	Etisalat	Glo	MTN
Airtel	1
Etisalat	0.071152119	1
Glo	0.195841509	−0.067886319	1
MTN	0.234379201	0.362204336	0.418815939	1

Table 4

Correlation matrix for DCR.

Mobile network operator	Airtel	Etisalat	Glo	MTN
Airtel	1
Etisalat	0.279793691	1
Glo	0.144183419	0.409243609	1
MTN	0.199628489	0.29964156	0.651951552	1

Table 5

Correlation matrix for SDCCH congestion.

Mobile network operator	Airtel	Etisalat	Glo	MTN
Airtel	1
Etisalat	0.524717639	1
Glo	−0.036816239	0.093673675	1
MTN	0.565437362	0.752745819	0.025714345	1

Table 6

Correlation matrix for TCH congestion.

Mobile network operator	Airtel	Etisalat	Glo	MTN
Airtel	1
Etisalat	0.14980923	1
Glo	0.143774356	−0.066326113	1
MTN	0.556604454	0.024529584	0.146238976	1

Table 7

ANOVA for CSSR.

	Source of variation	Sum of squares	Degree of freedom	Mean squares	F statistic	P-value
Airtel	Quarters	3.080164	3	1.026721	5.623495	0.003264
	Error	5.842467	32	0.182577
	Total	8.922631	35
Etisalat	Quarters	0.059275	3	0.019758	0.584086	0.629807
	Error	1.082489	32	0.033828
	Total	1.141764	35
Glo	Quarters	0.421	3	0.140333	1.349765	0.275728
	Error	3.327	32	0.103969
	Total	3.748	35
MTN	Quarters	2.207208	3	0.735736	1.321611	0.284484
	Error	17.81429	32	0.556697
	Total	20.0215	35

Table 8

ANOVA for DCR.

	Source of variation	Sum of squares	Degree of freedom	Mean squares	F statistic	P-value
Airtel	Quarters	0.031631	3	0.010544	2.646908	0.065774
	Error	0.127467	32	0.003983
	Total	0.159097	35
Etisalat	Quarters	0.021978	3	0.007326	0.491032	0.690992
	Error	0.477422	32	0.014919
	Total	0.4994	35
Glo	Quarters	0.047808	3	0.015936	0.277619	0.841112
	Error	1.836889	32	0.057403
	Total	1.884697	35
MTN	Quarters	0.117533	3	0.039178	0.452483	0.717324
	Error	2.770689	32	0.086584
	Total	2.888222	35

Table 9

ANOVA for SDCCH congestion.

	Source of variation	Sum of squares	Degree of freedom	Mean squares	F statistic	P-value
Airtel	Quarters	0.1965	3	0.0655	2.468528	0.079868
	Error	0.849089	32	0.026534
	Total	1.045589	35
Etisalat	Quarters	0.016942	3	0.005647	1.856197	0.156919
	Error	0.097356	32	0.003042
	Total	0.114297	35
Glo	Quarters	0.523389	3	0.174463	0.289155	0.83288
	Error	19.30733	32	0.603354
	Total	19.83072	35
MTN	Quarters	0.103631	3	0.034544	1.299782	0.291458
	Error	0.850444	32	0.026576
	Total	0.954075	35

Table 10

ANOVA for TCH congestion.

	Source of variation	Sum of squares	Degree of freedom	Mean squares	F statistic	P-value
Airtel	Quarters	0.610178	3	0.203393	4.641974	0.008351
	Error	1.402111	32	0.043816
	Total	2.012289	35
Etisalat	Quarters	0.141878	3	0.047293	2.084203	0.121863
	Error	0.726111	32	0.022691
	Total	0.867989	35
Glo	Quarters	0.056511	3	0.018837	0.126161	0.943923
	Error	4.777889	32	0.149309
	Total	4.8344	35
MTN	Quarters	0.093267	3	0.031089	0.467	0.707347
	Error	2.130289	32	0.066572
	Total	2.223556	35

Table 11

Tukey's multiple comparison post hoc test for CSSR.

Mobile network operator	Quarter	Quarter	Mean difference	Lower limit (95% confidence intervals)	Upper limit (95% confidence intervals)	P-value
Airtel	1	2	−0.6249	−0.2911	0.0427	0.1029
	1	3	−0.9271	−0.5933	−0.2596	0.0003
	1	4	−1.0993	−0.7656	−0.4318	0.0000
	2	3	−0.6360	−0.3022	0.0316	0.0858
	2	4	−0.8082	−0.4744	−0.1407	0.0034
	3	4	−0.5060	−0.1722	0.1616	0.4976
Etisalat	1	2	−0.1237	0.0867	0.2970	0.6711
	1	3	−0.2259	−0.0156	0.1948	0.9969
	1	4	−0.1604	0.0500	0.2604	0.9125
	2	3	−0.3126	−0.1022	0.1081	0.5472
	2	4	−0.2470	−0.0367	0.1737	0.9626
	3	4	−0.1448	0.0656	0.2759	0.8253
Glo	1	2	−0.4507	−0.0689	0.3129	0.9588
	1	3	−0.6741	−0.2922	0.0896	0.1782
	1	4	−0.5141	−0.1322	0.2496	0.7756
	2	3	−0.6052	−0.2233	0.1585	0.3903
	2	4	−0.4452	−0.0633	0.3185	0.9675
	3	4	−0.2218	0.1600	0.5418	0.6594
MTN	1	2	−0.3759	−0.0756	0.2248	0.8984
	1	3	−0.5104	−0.2100	0.0904	0.2431
	1	4	−0.9404	−0.6400	−0.3396	0.0000
	2	3	−0.4348	−0.1344	0.1659	0.6116
	2	4	−0.8648	−0.5644	−0.2641	0.0001
	3	4	−0.7304	−0.4300	−0.1296	0.0031

Table 12

Tukey's multiple comparison post hoc test for DCR.

Mobile network operator	Quarter	Quarter	Mean difference	Lower limit (95% confidence intervals)	Upper limit (95% confidence intervals)	P-value
Airtel	1	2	−0.0642	0.0000	0.0642	1.0000
	1	3	−0.1197	−0.0556	0.0086	0.1066
	1	4	−0.0386	0.0256	0.0897	0.6939
	2	3	−0.1197	−0.0556	0.0086	0.1066
	2	4	−0.0386	0.0256	0.0897	0.6939
	3	4	0.0169	0.0811	0.1453	0.0096
Etisalat	1	2	−0.1442	−0.0522	0.0397	0.4154
	1	3	−0.1386	−0.0467	0.0453	0.5113
	1	4	−0.1575	−0.0656	0.0264	0.2281
	2	3	−0.0864	0.0056	0.0975	0.9983
	2	4	−0.1053	−0.0133	0.0786	0.9778
	3	4	−0.1108	−0.0189	0.0730	0.9410
Glo	1	2	−0.1703	0.0156	0.2014	0.9955
	1	3	−0.0925	0.0933	0.2792	0.5203
	1	4	−0.1292	0.0567	0.2425	0.8344
	2	3	−0.1081	0.0778	0.2637	0.6604
	2	4	−0.1448	0.0411	0.2270	0.9279
	3	4	−0.2225	−0.0367	0.1492	0.9472
MTN	1	2	−0.1742	−0.0078	0.1587	0.9992
	1	3	−0.1498	0.0167	0.1831	0.9924
	1	4	−0.0331	0.1333	0.2998	0.1492
	2	3	−0.1420	0.0244	0.1909	0.9770
	2	4	−0.0253	0.1411	0.3076	0.1172
	3	4	−0.0498	0.1167	0.2831	0.2411

Table 13

Tukey's multiple comparison post hoc test for SDCCH congestion.

Mobile network operator	Quarter	Quarter	Mean difference	Lower limit (95% confidence intervals)	Upper limit (95% confidence intervals)	P-value
Airtel	1	2	−0.0466	0.0567	0.1600	0.4454
	1	3	0.0667	0.1700	0.2733	0.0007
	1	4	0.0678	0.1711	0.2744	0.0007
	2	3	0.0100	0.1133	0.2166	0.0278
	2	4	0.0112	0.1144	0.2177	0.0260
	3	4	−0.1022	0.0011	0.1044	1.0000
Etisalat	1	2	−0.1068	−0.0489	0.0091	0.1198
	1	3	−0.0546	0.0033	0.0613	0.9985
	1	4	−0.0580	0.0000	0.0580	1.0000
	2	3	−0.0057	0.0522	0.1102	0.0879
	2	4	−0.0091	0.0489	0.1068	0.1198
	3	4	−0.0613	−0.0033	0.0546	0.9985
Glo	1	2	−0.7016	−0.2344	0.2327	0.5208
	1	3	−0.4483	0.0189	0.4860	0.9995
	1	4	−0.3827	0.0844	0.5516	0.9586
	2	3	−0.2138	0.2533	0.7205	0.4554
	2	4	−0.1483	0.3189	0.7860	0.2616
	3	4	−0.4016	0.0656	0.5327	0.9798
MTN	1	2	−0.2492	−0.0556	0.1381	0.8576
	1	3	−0.0992	0.0944	0.2881	0.5442
	1	4	−0.1847	0.0089	0.2025	0.9993
	2	3	−0.0436	0.1500	0.3436	0.1702
	2	4	−0.1292	0.0644	0.2581	0.7955
	3	4	−0.2792	−0.0856	0.1081	0.6213

Table 14

Tukey's multiple comparison post hoc test for TCH congestion.

Mobile network operator	Quarter	Quarter	Mean difference	Lower limit (95% confidence intervals)	Upper limit (95% confidence intervals)	P-value
Airtel	1	2	0.0165	0.1533	0.2902	0.0241
	1	3	0.1587	0.2956	0.4324	0.0000
	1	4	0.1920	0.3289	0.4657	0.0000
	2	3	0.0054	0.1422	0.2791	0.0396
	2	4	0.0387	0.1756	0.3124	0.0085
	3	4	−0.1035	0.0333	0.1702	0.9067
Etisalat	1	2	−0.1790	0.0233	0.2257	0.9886
	1	3	−0.0679	0.1344	0.3368	0.2830
	1	4	−0.0645	0.1378	0.3401	0.2635
	2	3	−0.0912	0.1111	0.3134	0.4445
	2	4	−0.0879	0.1144	0.3168	0.4191
	3	4	−0.1990	0.0033	0.2057	1.0000
Glo	1	2	−0.2833	0.0256	0.3345	0.9957
	1	3	−0.2133	0.0956	0.4045	0.8284
	1	4	−0.2256	0.0833	0.3922	0.8782
	2	3	−0.2389	0.0700	0.3789	0.9230
	2	4	−0.2511	0.0578	0.3667	0.9545
	3	4	−0.3211	−0.0122	0.2967	0.9995
MTN	1	2	−0.2638	−0.0244	0.2149	0.9920
	1	3	−0.2226	0.0167	0.2560	0.9974
	1	4	−0.1293	0.1100	0.3493	0.5913
	2	3	−0.1982	0.0411	0.2804	0.9641
	2	4	−0.1049	0.1344	0.3738	0.4250
	3	4	−0.1460	0.0933	0.3326	0.7072

Table 15

CSSR data for months and quarters of year 2014–2016.

Year	Month	Quarter	Airtel	Etisalat	Glo	MTN
2014	Jan	1	96.99	99.2	96.89	96.85
	Feb	1	98.09	99.26	98.04	96.94
	Mar	1	98.29	98.97	98.33	97.19
	Apr	2	97.87	99.03	97.23	97.11
	May	2	98.04	98.39	98.28	97.01
	Jun	2	98.08	99.23	98.08	97.12
	Jul	3	98.08	99.33	98.21	97.12
	Aug	3	98.33	99.07	98.15	97.42
	Sep	3	98.27	99.28	98.42	97.52
	Oct	4	98.64	99.04	98.17	97.56
	Nov	4	98.71	99.1	98.25	98.73
	Dec	4	98.45	99.09	98.35	98.78
2015	Jan	1	96.8	98.94	98.26	98.25
	Feb	1	96.72	99.22	98.3	98.43
	Mar	1	97.23	99.19	98.56	98.28
	Apr	2	97.34	99.13	98.4	98.59
	May	2	97.41	99.18	98.47	98.14
	Jun	2	97.39	99.12	98.22	98.24
	Jul	3	98.06	99.27	98.22	98.37
	Aug	3	97.92	99.28	98.28	98.51
	Sep	3	98.03	99.26	98.14	98.45
	Oct	4	97.95	99.24	98.13	98.86
	Nov	4	98.13	99.3	98.08	98.83
	Dec	4	98.36	99.2	98.09	98.72
2016	Jan	1	98.23	99.34	98	98.88
	Feb	1	97.8	99.38	98.2	98.82
	Mar	1	98.35	99.33	97.99	98.98
	Apr	2	98.42	99.39	98.03	99.05
	May	2	98.14	99.22	98.09	99.02
	Jun	2	98.43	99.36	98.39	99.02
	Jul	3	98.53	99.27	98.59	99.06
	Aug	3	98.34	98.98	98.65	99.08
	Sep	3	98.28	99.23	98.54	98.98
	Oct	4	98.37	98.99	98.33	98.95
	Nov	4	98.42	99.24	98.25	98.99
	Dec	4	98.36	99.18	98.11	98.96

Table 16

DCR data for months and quarters of year 2014–2016.

Year	Month	Quarter	Airtel	Etisalat	Glo	MTN
2014	Jan	1	0.84	0.55	1.19	1.21
	Feb	1	0.71	0.54	0.85	1.29
	Mar	1	0.6	0.57	0.83	1.19
	Apr	2	0.67	0.54	1.43	1.43
	May	2	0.74	0.68	0.78	1.33
	Jun	2	0.8	0.55	0.85	1.3
	Jul	3	0.82	0.59	0.81	1.23
	Aug	3	0.85	0.6	0.78	1.22
	Sep	3	0.82	0.58	0.81	1.16
	Oct	4	0.79	0.86	0.91	1.23
	Nov	4	0.75	0.84	0.96	0.78
	Dec	4	0.73	0.8	0.86	0.72
2015	Jan	1	0.82	0.53	0.5	1.02
	Feb	1	0.84	0.51	0.46	0.9
	Mar	1	0.79	0.53	0.87	0.5
	Apr	2	0.69	0.52	0.48	0.85
	May	2	0.72	0.53	0.53	0.93
	Jun	2	0.75	0.54	0.4	0.72
	Jul	3	0.74	0.5	0.41	0.72
	Aug	3	0.71	0.5	0.55	0.76
	Sep	3	0.75	0.54	0.53	0.78
	Oct	4	0.7	0.54	0.46	0.72
	Nov	4	0.62	0.48	0.41	0.82
	Dec	4	0.63	0.44	0.6	0.82
2016	Jan	1	0.65	0.46	0.5	0.67
	Feb	1	0.69	0.43	0.5	0.71
	Mar	1	0.65	0.43	0.57	0.5
	Apr	2	0.69	0.72	0.54	0.45
	May	2	0.76	0.47	0.57	0.5
	Jun	2	0.77	0.47	0.55	0.55
	Jul	3	0.76	0.46	0.55	0.68
	Aug	3	0.86	0.7	0.49	0.64
	Sep	3	0.78	0.5	0.5	0.65
	Oct	4	0.73	0.27	0.54	0.63
	Nov	4	0.71	0.47	0.5	0.49
	Dec	4	0.7	0.44	0.52	0.58

Table 17

SDCCH congestion data for months and quarters of year 2014–2016.

Year	Month	Quarter	Airtel	Etisalat	Glo	MTN
2014	Jan	1	0.4	0.1	0.58	0.17
	Feb	1	0.14	0.07	0.24	0.17
	Mar	1	0.09	0.08	0.28	0.1
	Apr	2	0.2	0.23	1.51	0.68
	May	2	0.16	0.09	0.24	0.12
	Jun	2	0.12	0.09	0.22	0.12
	Jul	3	0.11	0.08	0.17	0.1
	Aug	3	0.16	0.13	0.23	0.09
	Sep	3	0.11	0.09	0.16	0.08
	Oct	4	0.09	0.07	0.17	0.13
	Nov	4	0.12	0.09	0.15	0.1
	Dec	4	0.12	0.11	0.16	0.12
2015	Jan	1	0.64	0.16	0.14	0.53
	Feb	1	0.79	0.11	0.13	0.48
	Mar	1	0.49	0.14	0.41	0.16
	Apr	2	0.5	0.29	0.14	0.39
	May	2	0.6	0.33	1.38	0.73
	Jun	2	0.51	0.13	1.55	0.13
	Jul	3	0.26	0.12	1.7	0.12
	Aug	3	0.34	0.11	1.49	0.14
	Sep	3	0.14	0.13	1.52	0.14
	Oct	4	0.36	0.13	1.78	0.11
	Nov	4	0.19	0.12	1.79	0.34
	Dec	4	0.2	0.14	1.86	0.42
2016	Jan	1	0.19	0.12	2.19	0.15
	Feb	1	0.2	0.11	1.94	0.15
	Mar	1	0.21	0.09	2.32	0.11
	Apr	2	0.17	0.03	1.86	0.1
	May	2	0.18	0.13	1.75	0.12
	Jun	2	0.2	0.1	1.69	0.13
	Jul	3	0.16	0.12	1.54	0.17
	Aug	3	0.18	0.07	0.71	0.14
	Sep	3	0.16	0.1	0.54	0.19
	Oct	4	0.18	0.13	0.5	0.27
	Nov	4	0.17	0.09	0.48	0.25
	Dec	4	0.18	0.1	0.58	0.2

Table 18

TCH congestion data for months and quarters of year 2014–2016.

Year	Month	Quarter	Airtel	Etisalat	Glo	MTN
2014	Jan	1	0.79	0.27	0.79	0.55
	Feb	1	0.32	0.29	0.69	0.57
	Mar	1	0.32	0.55	1.05	0.42
	Apr	2	0.45	0.18	1.67	1.27
	May	2	0.29	0.98	0.58	0.43
	Jun	2	0.28	0.09	0.99	0.37
	Jul	3	0.32	0.12	0.94	0.31
	Aug	3	0.23	0.24	1.06	0.3
	Sep	3	0.25	0.14	0.69	0.29
	Oct	4	0.12	0.08	0.72	0.34
	Nov	4	0.15	0.09	0.64	0.36
	Dec	4	0.14	0.12	0.73	0.31
2015	Jan	1	0.91	0.39	1.29	0.6
	Feb	1	0.89	0.19	1.06	0.64
	Mar	1	0.99	0.19	0.6	1.09
	Apr	2	0.99	0.26	0.93	0.56
	May	2	0.64	0.27	0.7	0.77
	Jun	2	0.73	0.26	1.25	0.75
	Jul	3	0.43	0.18	1.44	0.63
	Aug	3	0.47	0.2	1.5	0.88
	Sep	3	0.52	0.19	1.58	1.06
	Oct	4	0.46	0.17	1.53	0.49
	Nov	4	0.41	0.19	1.52	0.4
	Dec	4	0.4	0.26	1.69	0.4
2016	Jan	1	0.48	0.33	1.74	0.28
	Feb	1	0.48	0.28	1.46	0.3
	Mar	1	0.39	0.24	1.56	0.27
	Apr	2	0.27	0.1	1.54	0.25
	May	2	0.3	0.19	1.28	0.25
	Jun	2	0.24	0.19	1.07	0.29
	Jul	3	0.19	0.15	0.78	0.39
	Aug	3	0.19	0.15	0.63	0.34
	Sep	3	0.31	0.15	0.76	0.37
	Oct	4	0.29	0.17	0.83	0.38
	Nov	4	0.31	0.18	0.86	0.5
	Dec	4	0.33	0.23	0.97	0.55

Subject area	Telecommunication Engineering
More specific subject area	Cellular/Mobile Networks
Type of data	Table and figure
How data was acquired	Unprocessed secondary data
Data format	Filtered and analyzed
Experimental factors	Data were obtained from Nigerian Communications Commission (NCC)
Experimental features	The KPIs were measured from the Network Operating Centres (NOCs) of Airtel, Etisalat, Glo, and MTN at busy hours at the Base Station Controller (BSC) layer of the GSM networks. Computational analysis of the data are further provided.
Data source location	The data covers all the GSM networks deployed by the operators across Nigeria
Data accessibility	Data are available within this article
Software	MATLAB 2016a