Delhi Drive Test Comparison Reports_Sep 15

TUV SUD South Asia Pvt. Ltd. The result of the independent drive test held in the month of September 2015 & July 2015 at Delhi.

TUV SUD South Asia Pvt. Ltd.

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Table of Contents 1. Executive Summary ............................................................................................................................... 4

2. Benchmarking Test Overview ............................................................................................................... 5

2.1 Benchmarking Operators .................................................................................................................... 5

2.2 Drive Test Route .................................................................................................................................. 6

2.3 Benchmarking KPI Details ................................................................................................................... 7

2.4 Key Observation ................................................................................................................................ 10

3. Detail Result (Sep-15).......................................................................................................................... 11

3.1 Voice Benchmarking ......................................................................................................................... 11

3.1.1 Coverage Rate ................................................................................................................................ 11

Coverage Plot (Sep-15) ............................................................................................................................... 13

Aircel Rx Level Plot .................................................................................................................................. 13

Idea Rx Level Plot .................................................................................................................................... 14

Vodafone Rx Level Plot ........................................................................................................................... 15

Airtel Rx Level Plot .................................................................................................................................. 16

Reliance (GSM) Rx Level Plot .................................................................................................................. 17

Tata (CDMA) Rx Level Plot ...................................................................................................................... 18

3.1.2 Accessibility .................................................................................................................................... 19

3.1.3 Retainability ................................................................................................................................... 22

3.1.4 Mobility .......................................................................................................................................... 24

3.1.5 Rx Quality ....................................................................................................................................... 26

QUALITY PLOT (Sep-15) ........................................................................................................................... 27

Aircel Rx Quality Plot ............................................................................................................................... 27

Idea Rx Quality Plot ................................................................................................................................. 28

Vodafone Rx Quality Plot ........................................................................................................................ 29

Airtel Rx Quality Plot ............................................................................................................................... 30

Reliance (GSM) Rx Quality Plot ............................................................................................................... 31

Tata (CDMA) Rx Quality Plot ................................................................................................................... 32

3.1.6 Speech Quality Index (SQI) ............................................................................................................. 33

SQI PLOT (Sep-15) ................................................................................................................................... 34

Aircel SQI Plot.......................................................................................................................................... 34

Idea SQI Plot ............................................................................................................................................ 35


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Vodafone SQI Plot ................................................................................................................................... 36

Airtel SQI Plot .......................................................................................................................................... 37

Reliance (GSM) SQI Plot .......................................................................................................................... 38

3.1.7 Carrier over Interference (C/I) ....................................................................................................... 39

C/I PLOT (Sep-15) .................................................................................................................................... 40

Aircel C/I Plot .......................................................................................................................................... 40

Idea C/I Plot ............................................................................................................................................. 41

Vodafone C/I Plot .................................................................................................................................... 42

Airtel C/I Plot ........................................................................................................................................... 43

Reliance (GSM) C/I Plot ........................................................................................................................... 44

Tata (CDMA) Ec/Io Plot ........................................................................................................................... 45

4. Overall operator analysis based on comparison of two drive test held in the month of September

2015 & July 2015 at Delhi. .......................................................................................................................... 46


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1. Executive Summary Target Network: Idea, Airtel, Vodafone, Reliance (GSM), Aircel, Tata (CDMA)

Table 1.1 CITY DEMOGRAPHICS

Delhi Circle Details

Population 1.68 Crores (Census 2011)

Area 1483 Square Km

Population Density 11,320 People per Square Km

Delhi City Map is shown as below

Table 1.2 Delhi City Map1

1 www.mapsofworld.com


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2. Benchmarking Test Overview

2.1 Benchmarking Operators The objective was to develop a holistic view of any competitive advantage or disadvantage of competing

wireless operators in the area.

Total 6 Operators were benchmarked which is shown as below:

General information about the network of the cellular mobile service providers:

Operator Technology Band (MHz) BTS Count Subscribers*

(Prepaid + Postpaid)

Subscribers / BTS

Idea GSM 1800 4804 6019476 1253

Airtel GSM 900 & 1800 5988 12548419 2096

Vodafone GSM 900 & 1800 6115 9688516 1584

Reliance GSM 1800 2494 5130967 2057

Aircel GSM 1800 3749 5306870 1416

Tata CDMA 800 1466 2658454 1813

*Subscriber and BTS count details of Delhi circle are taken from QoS audit data (QE June 2015).


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2.2 Drive Test Route In the following figure, the green route depicts the associated drive route. The total drive route covered

is approximately 300 km over a period of 2 days per operator using a vehicle. The drive test was carried

out from 09:00 hrs to 20:30 hrs on 28th to 29th September 2015. In all about 3277 calls were made for all

6 operators.

Drive Test Route

Area Covered

New Delhi Railway Station Bhimrao Marg Airport T3 INA

Mirdag Marg Akbar Road Uttam Nagar Delhi Hat

LNJP Hospital Teen Murti Marg Delhi Gate AIIMS

CP Outer/Inner Circle South Avenue Bahadur Shah Marg Sri Arvindo Marg

RK Ashram Marg T Point Mathura Road JNU Campus outer

Gole Market ITC Maurya Lodhi Road Qutub Minar

GPO CSD Road CGO Interior Saket Metro

RML Hospital Jail Road Bhism Pitamah Road Batra Hospital

Nehru Place Govind puri


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2.3 Benchmarking KPI Details

Benchmarking KPI details table (Comparison statement of the two independent drive test held in the

months of September 2015 & July 2015 at Delhi)

KPI Aircel Idea Vodafone Airtel Reliance (GSM)

Tata (CDMA)

Coverage % (Sep-15) 85.97% 92.74% 84.35% 87.75% 51.53% 82.75%

Coverage % (Jul-15) 74.32% 87.42% 87.29% 91.26% 57.96% 58.07%

Accessibility % (Sep-15) 94.55% 96.35% 97.40% 96.47% 95.92% 97.72%

Accessibility % (Jul-15) 97.05% 73.91% 95.31% 91.82% 89.55% 98.89%

Retainability % (Sep-15) 90.87% 99.06% 95.26% 93.42% 98.25% 98.50%

Retainability % (Jul-15) 94.82% 97.16% 95.72% 91.96% 82.71% 99.16%

Mobility % (Sep-15) 96.94% 98.77% 98.58% 96.74% 99.00% 100.00%

Mobility % (Jul-15) 97.85% 98.65% 94.15% 95.94% 96.86% 94.12%

Rx Quality % (Sep-15) 89.14% 94.33% 92.89% 87.59% 88.53% 98.59%

Rx Quality % (Jul-15) 82.69% 91.12% 90.67% 84.32% 85.36% 99.68%

C/I % (Sep-15) 62.19% 69.72% 66.62% 53.43% 63.07% 95.69%

C/I % (Jul-15) 53.64% 60.30% 58.82% 43.82% 53.64% 79.96%

SQI % (Sep-15) 76.87% 79.96% 82.40% 79.35% 81.00% --

SQI % (Jul-15) 76.19% 79.51% 82.13% 78.85% 80.61% --


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RF Coverage

RF Coverage relates to the geographical footprint within the system that has sufficient RF signal strength

to provide for a call/data session. The Coverage rate of an operator is calculated basis of % of samples in

which the Rx level is better than -85 dbm.

Accessibility

Accessibility is the ability of a service to be obtained within specific tolerances and other given

conditions, when requested by the user. In other words, the ability of a user to obtain the requested

service from the system. Accessibility is monitored by measuring Call Setup Success Rate (CSSR) which is

defined as the ratio of Established Calls to Call Attempts.

Retainability

Retainability is The ability of a service, once obtained, to continue to be provided under given

conditions for a requested duration. For determining the Retainabilty the regulation prescribes three

important parameters namely Call drop rate (CDR), Worst affected Cells having more than 3% TCH drop

and Connection with good voice quality. The call drop and Connection with good voice quality were

monitored by the drive test.

Mobility

In a cellular system a base station has only a limited coverage area. Hence it is possible for a moving subscriber to be out of range of a base station while making a call. The process by which a mobile telephone call is transferred from one base station to another as the subscriber passes the boundary of a cell is called a handover. The Handover success rate (HOSR) more than 95% is considered to be good.

Rx Quality

For measuring voice quality, Rx Qual samples on a scale from 0 to 7 for GSM operators and Frame Error Rate (FERs) for CDMA service providers are measured. As per the QoS norms, Rx Qual between 0- 5 for GSM operators and between 0-4% FER value for CDMA operators FERs is considered to be good, where as Rx Qual beyond this benchmark is considered to be bad.

Speech Quality Index (SQI)

Speech Quality Index (SQI) is a measure which is dedicated to reflect the quality of the speech (as opposed to radio environment conditions). This means that when optimizing the speech quality in network, SQI is the best criterion to use. The SQI between 18 to 30 are considered good and 0 to 18 bad.

Carrier over Interference (C/I)

The carrier-over-interference ratio is the ratio between the levels of the signal strength of the current

serving cell to that of the signal strength of undesired (interfering) signal components. The C/I should be

more than 9 db i.e. between samples 15 to 30 are considered good.


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KPI distribution graph

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

Aircel Idea Vodafone Airtel Reliance (GSM) Tata (CDMA)


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2.4 Key Observation The overall performance of all operators is mentioned in the table. Over 450+ calls were made per

operator during the data collection period with approximate 300 Km drive test covered.

We can explain the network condition in terms of coverage, quality, accessibility, retainability, speech

quality Index and Carrier over Interference ratio of the various service providers on the basis of the

values obtained. The TSPs are also ranked accordingly and tabulated below:

Key observation table (Comparison statement of the two independent drive test held in the months of

September 2015 & July 2015 at Delhi)

Operator Coverage Rate CSSR CCSR Rx Quality C/I SQI

Aircel (Sep-15) 3 6 6 4 5 5

Aircel (Jul-15) 4 2 4 6 5 5

Idea (Sep-15) 1 4 1 2 2 3

Idea (Jul-15) 2 6 2 2 3 2

Vodafone (Sep-15) 4 2 4 3 3 1

Vodafone (Jul-15) 3 3 3 3 1 3

Airtel (Sep-15) 2 3 5 6 6 4

Airtel (Jul-15) 1 4 5 5 4 6

Reliance (GSM) Sep 15 6 5 3 5 4 2

Reliance (GSM) Jul 15 6 5 6 4 2 4

Tata (CDMA) Sep 15 5 1 2 1 1 --

Tata (CDMA) Jul 15 5 1 1 1 1 --

CSSR: Call Setup Success Rate; CCSR: Call Completion Success Rate; SQI: Speech Quality Index; C/I: Carrier over Interference.


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3. Detail Result (Sep-15)

3.1 Voice Benchmarking

3.1.1 Coverage Rate

RF Coverage relates to the geographical footprint within the system that has sufficient RF signal strength

to provide for a call/data session. The Coverage rate of an operator is calculated basis of % of samples in

which the Rx level is better than -85 dbm. The coverage rate varies from 92.74% (for Idea) to 51.53% (for

Reliance GSM). The details are as follows.

Table 3.1 Coverage Summary and Ranking

Operator Coverage Rate Ranking

Aircel 85.97% 3

Idea 92.74% 1

Vodafone 84.35% 4

Airtel 87.75% 2

Reliance (GSM) 51.53% 6

Tata(CDMA) 82.75% 5

Coverage Rate Details Graph

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10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%

Aircel Idea Vodafone Airtel Reliance (GSM)

Tata(CDMA)

47

.44

% 6

6.0

4%

54

.85

%

53

.16

%

20

.13

%

56

.81

%

85

.97

%

92

.74

%

84

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%

87

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%

51

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%

82

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%

98

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98

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98

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86

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%

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0 to -75dBm 0 to -85dBm 0 to -95dBm 0 to -110dBm


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Table 3.2 Rx Level for operators

Operator Rx Level 0 to -75dBm Rx Level 0 to -

85dBm Rx Level 0 to -

95dBm Rx Level 0 to -

110dBm

Aircel 47.44% 85.97% 98.74% 100.00%

Idea 66.04% 92.74% 99.33% 100.00%

Vodafone 54.85% 84.35% 98.07% 100.00%

Airtel 53.16% 87.75% 98.95% 100.00%

Reliance (GSM) 20.13% 51.53% 86.80% 100.00%

Tata (CDMA) 56.81% 82.75% 99.28% 100.00%


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Coverage Plot (Sep-15)

Aircel Rx Level Plot


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Idea Rx Level Plot


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Vodafone Rx Level Plot


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Airtel Rx Level Plot


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Reliance (GSM) Rx Level Plot


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Tata (CDMA) Rx Level Plot


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3.1.2 Accessibility For determining the accessibility there are three important parameters to be monitored, namely

Call Setup Success Rate (CSSR), Standalone Dedicated Control Channel (SDCCH)/ Paging Channel and

Traffic Channel (TCH).

Call Set-up Success Rate (CSSR):

Call Setup Success Rate is defined as the ratio of Established Calls to Call Attempts. Established Calls

means the following events have happened in call setup:

i) Attempt is made

ii) The TCH is allocated and

iii) The call is routed to the outwards path of the concerned MSC.

Accessibility Summary

Accessibility is the ability of a service to be obtained within specific tolerances and other given

conditions, when requested by the user. In other words, the ability of a user to obtain the requested

service from the system. Accessibility is monitored by measuring Call Setup Success Rate (CSSR)

which is defined as the ratio of Established Calls to Call Attempts. The benchmark is 95%. The

performance of the operators varies from 97.72% (for Tata CDMA) to 94.55% (for Aircel). The

details are as follows:

Table 3.3 Accessibility Summary and Ranking

Operator Name Total Call Attempt

Call Block CSSR Ranking

Aircel 459 25 94.55% 6

Idea 548 20 96.35% 4

Vodafone 576 15 97.40% 2

Airtel 566 20 96.47% 3

Reliance (GSM) 515 21 95.92% 5

Tata (CDMA) 613 14 97.72% 1


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CSSR & Block Call Rate Details Graph

Accessibility Details Graph

Operator Total Call Attempt

Call Block Call Success CSSR BCR

Aircel 459 25 434 94.55% 5.45%

Idea 548 20 528 96.35% 3.65%

Vodafone 576 15 561 97.40% 2.60%

Airtel 566 20 546 96.47% 3.53%

Reliance (GSM) 515 21 494 95.92% 4.08%

Tata (CDMA) 613 14 599 97.72% 2.28%

CSSR: Call Setup Success Rate

BCR: Block Call Rate

0.00% 10.00% 20.00% 30.00% 40.00% 50.00% 60.00% 70.00% 80.00% 90.00%

100.00% 94.55% 96.35% 97.40% 96.47% 95.92% 97.72%

5.45% 3.65% 2.60% 3.53% 4.08% 2.28%

CSSR BCR


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CSSR & Block Call Rate Statistics

0

100

200

300

400

500

600

700


Tata (CDMA)

459

548 576 566

515

613

434

528 561 546

494

599

25 20 15 20 21 14

Total Call Attempt Call Success Call Block


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3.1.3 Retainability

Retainability is The ability of a service, once obtained, to continue to be provided under given

conditions for a requested duration. For determining the retainabilty, the regulation prescribes three

important parameters namely Call drop rate (CDR), Worst affected Cells having more than 3% TCH drop

and Connection with good voice quality. The call drop and Connection with good voice quality were

monitored by the drive test.

Call Drop Rate (CDR): The parameter gives a reliable measurement of the mobile network used by the service provider for maintaining a call once it has been correctly established. The Call drop rate of TSPs varies from 0.94% (Idea) to 9.13% (Aircel) as shown below:

Table 3.4 Retainability Summary and Ranking

Operator Total Call

Established Total Call

Drop CCSR

CDR (Retainability)

Ranking

Aircel 459 39 90.87% 9.13% 6

Idea 548 5 99.06% 0.94% 1

Vodafone 576 27 95.26% 4.74% 4

Airtel 566 37 93.42% 6.58% 5

Reliance (GSM) 515 9 98.25% 1.75% 3

Tata (CDMA) 613 9 98.50% 1.50% 2

CCSR: Call Completion Success Rate

CDR: Call Drop Rate


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Success & Call Drop Rate Details Graph

Success & Call Drop Rate Statistics Graph

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40.00%

50.00%

60.00%

70.00%

80.00%

90.00%

100.00%


Tata(CDMA)

90.87%

99.06% 95.26% 93.42%

98.25% 98.50%

9.13%

0.94% 4.74% 6.58%

1.75% 1.50%

CCSR CDR

0

100

200

300

400

500

600

700

459

548 576 566

515

613

427

533 570 562

513

599

39 5 27

37 9 9

Total Call Attempt Call Established Call Drop


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3.1.4 Mobility

In a cellular system a base station has only a limited coverage area. Hence it is possible for a moving subscriber to get out of reach of a base station while making a call. The process by which a mobile telephone call is transferred from one base station to another as the subscriber passes the boundary of a cell is called a handover.

The Handover success rate (HOSR) more than 95% is considered to be good. The performance of the TSPs varies from 100.00 % (Tata CDMA) to 96.74% (Airtel). The Operators performance is as given below.

Table 3.5 Mobility Summary and Ranking

Operator Total HO Attempt Total HO Success HO Success Rate% Ranking

Aircel 1177 1141 96.94% 5

Idea 1060 1047 98.77% 3

Vodafone 1271 1253 98.58% 4

Airtel 1195 1156 96.74% 6

Reliance (GSM) 902 893 99.00% 2

Tata (CDMA) 1272 1272 100.00% 1

Success & Fail Handover Rate Details Graph

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Tata(CDMA)

96.94% 98.77% 98.58% 96.74% 99.00% 100.00%

3.06% 1.23% 1.42% 3.26% 1.00% 0.00%

HO Success Rate HO Failure Rate


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Success & Fail Handover Rate Statistics Graph

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Tata(CDMA)

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HO Attempt HO Success HO Success Rate


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3.1.5 Rx Quality

For measuring voice quality, Rx Qual samples on a scale from 0 to 7 for GSM operators and Frame Error

Rate (FERs) for CDMA service providers are measured. As per the QoS norms, Rx Qual between 0- 5 for

GSM operators and between 0-4% FER value for CDMA operators FERs is considered to be good, where

as Rx Qual beyond this benchmark is considered to be bad. The benchmark should usually be > 95%.

Accordingly the RF quality is determined and as can be seen from the table below the performance has

varied from 98.59% (Tata CDMA) to 87.59% (Airtel).

Table 3.6 Rx Quality Summary and Ranking

Operator Rx Quality

Samples (0-5) Rx Quality

Samples (0-7) Rx Quality Samples (%) Ranking

Aircel 730700 88993 89.14% 4

Idea 1029994 61930 94.33% 2

Vodafone 1106770 84756 92.89% 3

Airtel 991632 140504 87.59% 6

Reliance (GSM) 950931 123189 88.53% 5

Tata (CDMA) 225814 3219 98.59% 1

Rx Quality Details Graph

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100.00%


Tata(CDMA)

89

.14

%

94

.33

%

92

.89

%

87

.59

%

88

.53

%

98

.59

%

10

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%

5.6

7%

7.1

1%

12

.41

%

11

.47

%

1.4

1%

Rx Quality Samples (0-5)% Rx Quality Samples (6-7)%


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QUALITY PLOT (Sep-15)

Aircel Rx Quality Plot


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Idea Rx Quality Plot


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Vodafone Rx Quality Plot


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Airtel Rx Quality Plot


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Reliance (GSM) Rx Quality Plot


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Tata (CDMA) Rx Quality Plot


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3.1.6 Speech Quality Index (SQI) SQI is a more sophisticated measure which is dedicated to reflecting the quality of the speech (as opposed to radio environment conditions). This means that when optimizing the speech quality in network, SQI is the best criterion to use. The SQI between 18 to 30 are considered good and 0 to 18 bad.

Table 3.7 Speech Quality Index and Ranking

Operator SQI Samples

(18-30) SQI Samples

(0-18) Total Sample

SQI Samples (%)

Ranking

Aircel 390056 117366 507422 76.87% 5

Idea 398019 99725 497744 79.96% 3

Vodafone 420954 89931 510885 82.40% 1

Airtel 442881 115287 558168 79.35% 4

Reliance (GSM) 314840 73853 388693 81.00% 2

Tata (CDMA) -- -- -- -- --

Speech Quality Index Details Graph

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10.00%

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30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

90.00%


Tata (CDMA)

76

.87

%

79

.96

%

82

.40

%

79

.35

%

81

.00

%

23

.13

%

20

.04

%

17

.60

%

20

.65

%

19

.00

%

SQI Samples (18-30) SQI Samples (0-18)


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SQI PLOT (Sep-15)

Aircel SQI Plot


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Idea SQI Plot


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Vodafone SQI Plot


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Airtel SQI Plot


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Reliance (GSM) SQI Plot


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3.1.7 Carrier over Interference (C/I) The carrier-over-interference ratio is the ratio between the levels of the signal strength of the current serving cell to that of the signal strength of undesired (interfering) signal components.

The C/I should be more than 9 db i.e. samples between 15 to 30 are considered good.

Table 3.8 C/I and Ranking

Operator C/I Samples

(>15) C/I Total Samples C/I Samples (%) Ranking

Aircel 300884 483776 62.19% 5

Idea 314175 450614 69.72% 2

Vodafone 293934 441187 66.62% 3

Airtel 274736 514220 53.43% 6

Reliance (GSM) 213959 339267 63.07% 4

Tata (CDMA) 253856 265277 95.69% 1

C/I Index Details Graph

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100.00%

62

.19

%

69

.72

%

66

.62

%

53

.43

%

63

.07

%

95

.69

%

37

.81

%

30

.28

%

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.38

%

46

.57

%

36

.93

%

4.3

1%

C/I Samples (15-30) C/I Samples (0-15)


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C/I PLOT (Sep-15)

Aircel C/I Plot


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Idea C/I Plot


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Vodafone C/I Plot


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Airtel C/I Plot


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Reliance (GSM) C/I Plot


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Tata (CDMA) Ec/Io Plot


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4. Overall operator analysis based on comparison of two drive test held in

the month of September 2015 & July 2015 at Delhi.

KPI Aircel Idea Vodafone Airtel Reliance

(GSM) Tata

(CDMA)

Call Attempt (Sep-15) 459 548 576 566 515 613

Call Attempt (Jul-15) 441 782 490 587 603 723

Blocked Call Rate (Sep-15) 5.45% 3.65% 2.60% 3.53% 4.08% 2.28%

Blocked Call Rate (Jul-15) 2.95% 26.09% 4.69% 8.18% 10.45% 1.11%

Call Setup Success Rate Sep 15 (95%) 94.55% 96.35% 97.40% 96.47% 95.92% 97.72%

Call Setup Success Rate Jul 15 (95%) 97.05% 73.91% 95.31% 91.82% 89.55% 98.89%

Call Drop Rate Sep 15 (2%) 9.13% 0.94% 4.74% 6.58% 1.75% 1.50%

Call Drop Rate Jul 15 (2%) 5.18% 2.84% 4.28% 8.04% 17.29% 0.84%

Rx Quality (0-5) Sep 15 (95%) 89.14% 94.33% 92.89% 87.59% 88.53% 98.59%

Rx Quality (0-5) Jul 15 (95%) 82.69% 91.12% 90.67% 84.32% 85.36% 99.68%

Handover Success Rate (Sep-15) 96.94% 98.77% 98.58% 96.74% 99.00% 100.00%

Handover Success Rate (Jul-15) 97.85% 98.65% 94.15% 95.94% 96.86% 94.12%


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Analysis: Independent drive test was conducted by TUV SUD on behave of TRAI for Aircel, Idea, Vodafone, Airtel, Reliance(GSM) and Tata(CDMA) in delhi covering locations suggested by TRAI in the month of September 2015 & July 2015. The drive test results revealed that there was no considerable improvement in the performance of the service providers as they are still showing the non compliance performance in respect of the most of the parameters. The service providers are having improved performance for some of the parameters as compared to the previous drive test results but are still not complying with the benchmark.

Delhi Drive Test Comparison Reports_Sep 15

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