independent drive test report idt report... · • most of the calls are blocked due to sdcch...
TRANSCRIPT
Independent Drive Test Report
- September’16
PATNA
Key performance indicators for most of the operators: Most of the operators met the Call Setup
Success Rate (CSSR), where as most of the operators fall below the 2% CDR threshold
Methodology:
Independent Drive test was conducted in Patna from 9:00 AM to 9:PM from 5th to 6th of September 2016. The total drive test covered in Patna
area was approximately 200 km over a period of 2 days. A total of ~3438 calls were made for six 2G networks and four 3G networks covering
seven operators.
1 2 3 4
City-Level
Performance
Area-Level
Performance Analysis Summary
and
Highlights
Date: 3 November 2016
5
Appendix I. Benchmarking KPIs
II. Coverage
III. Receive (Rx) Quality
IV. City-Level Ranking
V. City-Level KPI
The independent drive test has been carried out by M/s IMRB International on behalf of TRAI
City-Level
Performance
Introduction
Ancillary Details
Overview
TRAI is regularly monitoring the performance of Telecom Service Providers (TSP) against the benchmarks for the various Quality of
Service (QoS) parameters laid down by the Authority. TSPs submit Performance Monitoring Reports to TRAI every quarter. TRAI also
undertakes audit and assessment of Quality of Service through independent agencies to verify the Quality of Service claimed. The Audit
agencies conduct sample ‘Drive tests’ across various cities all over the country as part of audit and assessment of the TSPs’
performance.
In view of complaints on call drops and other network issues, on behalf of TRAI, an Independent Drive Test (IDT) was conducted from 5th
September 2016 to 6th September 2016 covering various locations in Patna . The performance of Aircel, Airtel, BSNL, Idea, Vodafone,
Reliance, Telenor was monitored across various technologies (2G, 3G and CDMA). The drive test route was defined on the basis of
several factors that include - areas from where call drop complaints are commonly received; areas of heavy usage; residential areas
away from arterial roads; office areas; areas where previous Drive tests showed network issues; etc.
For the purpose of these tests, 2G + 3G Mode (Auto) was used. The test results obtained from these drive tests were conducted to
assess the network condition more specifically in terms of Radio Frequency (RF) Coverage; Rx Quality; Call Setup Success Rate; Call
Drop Rate; Blocked Calls and Carrier to Interference ratio.
Drive Route Details For Goa Area:
Independent Drive test was conducted in Mumbai to Goa area from 9:00 AM to 9:PM from 5th to 6th of September 2016. The total drive
test covered in Patna area was approximately 180 km over a period of 2 days. Total of ~3438 calls were made for six 2G networks and
four 3G networks, covering seven operators.
Roads and Areas covered in Patna is shown in the below map.
Below is the List of Areas Covered and Drive Routes
1
Danapur cantt Sabajpur Indira Nagar Karam Uchak Village
Jalalpur Saket Vihar Shivaji Path Begampur
Mansarovar nagar Shivaji Nagar Patna Internationl Airport Bajrang Puri
Sadikpur Bituara Anisabad Golakpur
HMRI Hospital Neora Road Sipara Mangal Chowk
Nandgaon Mahua Bagh Lohia Nagar Choti Pahadi
Indrapuri Dhulwari Buddha Colony Patrakar Nagar
Central Revenue Colony Varundavan Colony Nageshwar Colony Janki Nagar
XTTI Colony Yakubpur Nagwan Gandhi Maidan Quasim Colony
Taklapur Isha Nagar Patna Medical College & University Sultan Ganj
Drive test route
1. City-Level Performance
City-Level Details Operator Performance against Key Performance Indicators :
1. Call Setup Success Rate, 2. Blocked Call Rate, 3. Call Drop Rate, 4. Rx Quality
Legends
Threshold for each KPI are considered as per TRAI guidelines Abbreviation / Definition: CSSR (benchmark > =95%) : Call Setup Success Rate
BCR (benchmark <=3%): Blocked Call Rate
CDR (benchmark <=2%): Call Drop Rate
Good RxQuality (benchmark >=95%): 2G (RxQual <=5), 3G (EcNo >=-15dBm), CDMA (FER <=4%)
Most of the operators have met the
Call Setup Success Rate benchmark
of >=95%, except Airtel 3G. Refer. Fig 1
Most of the operators have met the
Blocked Call Rate benchmark of
<=3%, except Aircel 2G, Airtel 2G
&3G. Refer. Fig 2
Most of the operators failed to meet
the Call Drop Rate benchmark of
<=2%, except Airtel 2G, Idea 2G,
Reliance 3G and Vodafone 2G.
Refer. Fig 3
Half of the operators failed to meet
the Rx Quality Rate benchmark of
>=95%, except Aircel 3G, Airtel 3G,
Idea 2G, Reliance 3G and Vodafone
2G.
Refer. Fig 4
Operator meeting the benchmark Operator not meeting the benchmark
2
Current Drive: September 2016
96.41% 97.39% 96.96% 94.23%
97.02% 98.10% 99.73%
98.04% 98.36% 98.64%
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Fig 1. Call Setup Success Rate (%)
95%
3.59% 2.61% 3.04%
5.77%
2.98% 1.90% 0.27% 1.96% 1.64% 1.36%
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Fig 2. Block Call Rate (%)
3%
2.58% 3.36%
0.28% 2.04%
3.35%
12.58%
0.27% 2.00% 2.22% 1.10%
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Fig 3. Call Drop Rate (%)
2%
86.49%
96.88% 93.63%
98.78%
92.78% 93.25% 95.04% 95.44%
91.32%
96.93%
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Fig 4. Rx Quality (%)
95%
2. Area-Level Performance
Area-Level Details
Legends
Drive test route covered in Patna city
Fig 5. Area Level route map
Areas meeting the benchmark Areas not meeting the benchmark
Abbreviation / Definition: CSSR (benchmark > =95%) : Call Setup Success Rate
BCR (benchmark <=3%): Blocked Call Rate
CDR (benchmark <=2%): Call Drop Rate
Good RxQuality (benchmark >=95%): 2G (RxQual <=5), 3G (EcNo >=-15dBm), CDMA (FER <=4%)
3
Threshold for each KPI are considered as per TRAI guidelines
Current Drive: September 2016
2. Area-Level Performance
Area-Level Details
Legends
Area Level KPI performance ( all operators inclusive)
Abbreviation / Definition: CSSR (benchmark > =95%) : Call Setup Success Rate
BCR (benchmark <=3%): Blocked Call Rate
CDR (benchmark <=2%): Call Drop Rate
Good RxQuality (benchmark >=95%): 2G (RxQual <=5), 3G (EcNo >=-15dBm), CDMA (FER <=4%)
4
Areas meeting the benchmark Areas not meeting the benchmark
Threshold for each KPI are considered as per TRAI guidelines Current Drive: September 2016
Blocked Call Rate Aircel Airtel BSNL Idea Reliance Telenor Vodafone
DANAPUR CANTT 2.63% 5.41% 1.85% 0.00% 0.00% 0.00% 3.28%
KHAGAUL 8.22% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
PATNA CENTRAL 2.21% 5.60% 3.83% 0.79% 0.96% 2.42% 0.00%
KUMHRAR 2.75% 3.92% 2.26% 0.00% 4.17% 2.11% 2.11%
Call Drop Rate Aircel Airtel BSNL Idea Reliance Telenor Vodafone
DANAPUR CANTT 2.70% 0.00% 10.38% 1.64% 3.92% 1.64% 1.69%
KHAGAUL 4.48% 0.00% 2.60% 0.00% 3.23% 5.13% 0.00%
PATNA CENTRAL 3.17% 0.91% 7.96% 0.00% 1.94% 2.48% 1.59%
KUMHRAR 2.42% 2.04% 7.72% 0.00% 0.87% 1.44% 0.72%
Rx Quality Aircel Airtel BSNL Idea Reliance Telenor Vodafone
DANAPUR CANTT 90.43% 96.06% 91.19% 95.43% 92.01% 90.51% 95.22%
KHAGAUL 84.56% 95.58% 94.62% 97.58% 89.69% 92.20% 98.97%
PATNA CENTRAL 91.67% 94.60% 89.89% 94.61% 96.82% 87.86% 95.58%
KUMHRAR 91.16% 96.52% 95.27% 94.51% 97.40% 94.12% 98.28%
Call Setup Success Rate Aircel Airtel BSNL Idea Reliance Telenor Vodafone
DANAPUR CANTT 97.37% 94.59% 98.15% 100.00% 100.00% 100.00% 96.72%
KHAGAUL 91.78% 100.00% 100.00% 100.00% 100.00% 100.00% 100.00%
PATNA CENTRAL 97.79% 94.40% 96.17% 99.21% 99.04% 97.58% 100.00%
KUMHRAR 97.25% 96.08% 97.74% 100.00% 95.83% 97.89% 97.89%
Detailed Analysis of Operators
High RLT
• Radio Link Timeout (RLT indicates how long the call can
sustain during poor quality – Higher the value the
longer it will sustain the call).
• If Radio Link Timeout of > 40 is considered in RLT <=40
for Aircel 2G, the Call Drop Rate would be higher than
the current call drop rate(2.58%).
3. Analysis
Legends Current Drive: September 2016
Operator meeting the set CDR threshold Operator not meeting the set CDR threshold
Abbreviation / Definition: CSSR (benchmark >=95%) : Call Setup Success Rate
BCR (benchmark <=3%): Blocked Call Rate
CDR (benchmark <=2%): Call Drop Rate
Good RxQuality (benchmark >=95%): 2G (RxQual <=5), 3G (EcNo >=-15dBm), CDMA (FER <=4%)
Threshold for each KPI are considered as per TRAI guidelines
Operators No. of Cells
with RLT <= 40
No. of Cells
with RLT > 40 Current CDR
CDR, If all
Cells assume
RLT <= 40
Airtel 100.00% 0.00% 0.28% 0.28%
Aircel 90.16% 9.84% 2.58% 2.87%
Vodafone 100.00% 0.00% 1.10% 1.10%
Idea 100.00% 0.00% 0.27% 0.27%
BSNL 100.00% 0.00% 3.35% 3.35%
Telenor 100.00% 0.00% 2.22% 2.22%
5
3. Analysis
Detailed Analysis of Operators
Aircel 2G (CDR : 2.58%, BCR : 3.59%, Rx Quality : 86.49%, )
• Poor quality of network is clear indication of high call block rate.
Khagaul, Patna Central, Kumhrar are the key contributed areas of
high block rate
• Most of the calls are blocked due to SDCCH access failure,
SDCCH drop and TCH access failure .
• Aircel 2G having poor HOSR as well.
Airtel 3G (CDR : 2.04%, BCR : 5.77%)
• Danapur Cantt, Patna Central and Kumhrar are the key contributed
area of blocked calls.
• Most of the calls are blocked in 2G mode due to SDCCH access
failure and SDCCH drop.
Legends Current Drive: September 2016
Operator meeting the set CDR threshold Operator not meeting the set CDR threshold
Abbreviation / Definition: CSSR (benchmark > =95%) : Call Setup Success Rate
BCR (benchmark <=3%): Blocked Call Rate
CDR (benchmark <=2%): Call Drop Rate
Good RxQuality (benchmark >=95%): 2G (RxQual <=5), 3G (EcNo >=-15dBm), CDMA (FER <=4%)
6
Parameter
Highlighted areas(Danapur
Cantt , Patna Central ,
Kumhrar)
Rest of
Patna
# call blocks 18 0
Threshold for each KPI are considered as per TRAI guidelines
Parameter Whole Patna
# call blocks 13
# call drops 9
3. Analysis
Detailed Analysis of Operators
BSNL 3G (CDR : 12.58%, Coverage : 47.01%)
• Patna Central and Kumhrar are the key contributed areas of dropped
calls. Dropped Calls in these areas are 79.49% of total dropped calls in
all areas.
• Poor coverage of network is clear indication of high call drop rate.
• Due to poor coverage of BSNL 3G network, 62.32% calls are in 2G
mode.
Legends Current Drive: September 2016
Operator meeting the set CDR threshold Operator not meeting the set CDR threshold
Abbreviation / Definition: CSSR (benchmark > =95%) : Call Setup Success Rate
BCR (benchmark <=3%): Blocked Call Rate
CDR (benchmark <=2%): Call Drop Rate
Good RxQuality (benchmark >=95%): 2G (RxQual <=5), 3G (EcNo >=-15dBm), CDMA (FER <=4%)
7
Threshold for each KPI are considered as per TRAI guidelines
Parameter
Highlighted
areas( Patna
Central ,
Kumhrar)
Rest of Patna
# call drops 31 8
BSNL 2G (CDR : 3.35%, Rx Quality : 92.78%, HOSR : 78.17%)
• Danapur Cantt and Patna Central are the key contributed areas of
dropped calls. Dropped Calls in these areas are 83.33% of total
dropped calls in all areas.
• Patna central and Kumhrar are key contributed areas of high block rate.
• Most of the calls are blocked due to SDCCH access failure, SDCCH drop
and TCH access failure.
Parameter
Highlighted
areas( Danapur
Cantt & Patna
Central)
Rest of Patna
# call drops 10 2
Parameter
Highlighted
areas( Kumhrar &
Patna Central)
Rest of Patna
# call blocks 10 1
4. Summary & Highlights
Summary & Highlights
Most of the operators failed to meet the Call Drop Rate benchmark of <=2%, except Airtel 2G, Idea
2G, Reliance 3G and Vodafone 2G.
Key Highlights
• Most of the operators failed to meet the Call Drop rate benchmark of <=2%, except Airtel 2G, Idea 2G, Reliance 3G
and Vodafone 2G.
• 3G network of BSNL have Call Drop Rates in the range of above 10%. The high drop rate for operator is clear
indication of urgent need of improvement in order to deliver a reasonable levels of services.
• All area in Patna City lagging in call drop benchmark with a small margin, so the operators need to focus on their
quality of services than currently is being provided.
Fig 6. Call Drop Rate
8
2.58% 3.36%
0.28% 2.04%
3.35%
12.58%
0.27% 2.00% 2.22%
1.10%
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Fig 6. Call Drop Rate (%)
5. Appendix
Ancillary Details
I. Benchmarking KPI Details
II. Coverage Details
III. Receive (Rx) Quality Details
IV. City-Level Ranking and KPI details
V. City-Level KPI details
Table of Contents in Appendix
9
Appendix
Ancillary Details
2. Benchmarking KPI Details
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. 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 Retainability 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. Drop Call 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, RxQual samples on a scale from 0 to 7 for GSM operators, EcNo from 0 to -30 dBm and Frame Error Rate
(FERs) for CDMA service providers are measured. As per the QoS norms, RxQual between 0- 5 for GSM operators, EcNo >= -15 dBm and
between 0-4% FER value for CDMA operators FERs is considered to be good, where as RxQual beyond this benchmark is considered to
be bad
10
Coverage % Accessibility % Retainability % Mobility % Rx Quality %
Aircel 2G 89.87% 96.41% 97.42% 94.65% 86.49%
Aircel 3G 76.79% 97.39% 96.64% 99.14% 96.88%
Airtel 2G 97.63% 96.96% 99.72% 97.73% 93.63%
Airtel 3G 90.44% 94.23% 97.96% 99.78% 98.78%
Bsnl 2G 98.35% 97.02% 96.65% 78.17% 92.78%
Bsnl 3G 47.01% 98.10% 87.42% 97.78% 93.25%
Idea 2G 94.35% 99.73% 99.73% 98.41% 95.04%
Reliance 3G 53.82% 98.04% 98.00% 99.94% 95.44%
Telenor 2G 89.28% 98.36% 97.78% 95.42% 91.32%
Vodafone 2G 87.41% 98.64% 98.90% 98.89% 96.93%
0.00%
25.00%
50.00%
75.00%
100.00%
KPI Distribution
Appendix
Ancillary Details
3. Coverage Details
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 details
are as follows.
Operators not meeting benchmark
11
Aircel 2G Aircel 3G Airtel 2G
Airtel 3G BSNL 2G BSNL 3G
0.00%
25.00%
50.00%
75.00%
100.00%
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Coverage Distribution
-95 to -120 dBm -85 to -95 dBm -75 to -85 dBm 0 to -75 dBm
Operators Coverage Rate
Aircel 2G 89.87%
Aircel 3G 76.79%
Airtel 2G 97.63%
Airtel 3G 90.44%
Bsnl 2G 98.35%
Bsnl 3G 47.01%
Idea 2G 94.35%
Reliance 3G 53.82%
Telenor 2G 89.28%
Vodafone 2G 87.41%
Appendix
Ancillary Details
3. Coverage Details
12
IDEA 2G RELIANCE 3G Telenor 2G
Vodafone 2G
Appendix
Ancillary Details
4. Receive (Rx) Quality Details
For measuring voice quality, RxQual samples on a scale from 0 to 7 for GSM operators, EcNo for 3G operators on a scale of 0 to -30
dBm and Frame Error Rate (FERs) for CDMA service providers are measured. As per the QoS norms, Rx Quality between 0- 5 for GSM
operators, EcNo >= -15 dBm and between 0-4% FER value for CDMA operators FERs is considered to be good, where as quality beyond
this benchmark is considered to be bad. The benchmark should usually be > =95%.
Operators not meeting benchmark
13
Aircel 2G Aircel 3G Airtel 2G
Airtel 3G BSNL 2G BSNL 3G
0.00%
25.00%
50.00%
75.00%
100.00%
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Rx Quality Distribution
RxQual 6 to 7, EcNo <-15 dBm, FER <= 4% RxQual 0 to 5, EcNo >=-15 dBm, FER > 4%
Operator Rx Quality
Aircel 2G 86.49%
Aircel 3G 96.88%
Airtel 2G 93.63%
Airtel 3G 98.78%
Bsnl 2G 92.78%
Bsnl 3G 93.25%
Idea 2G 95.04%
Reliance 3G 95.44%
Telenor 2G 91.32%
Vodafone 2G 96.93%
Appendix
Ancillary Details
4. Receive (Rx) Quality Details
14
IDEA 2G RELIANCE 3G Telenor 2G
Vodafone 2G
Appendix
Ancillary Details
5. City-Level Ranking and KPI details
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 details are as
follows:
Retainability is “the ability of a service, once obtained, to continue to be provided under given conditions for a requested duration.” For
determining the Retainability, 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
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 Ssuccess Rate (HOSR) more than 95% is
considered to be good
*In case of multiple call failure in similar geo location in given period of 60sec has been counted as one call failure
Operators not meeting benchmark
15
Operators Total HO Attempt HO Failure HO Success HO Failure Rate HO Success Rate
Aircel 2G 579 31 548 5.35% 94.65%
Aircel 3G 3601 31 3570 0.86% 99.14%
Airtel 2G 970 22 948 2.27% 97.73%
Airtel 3G 5569 12 5557 0.22% 99.78%
Bsnl 2G 655 143 512 21.83% 78.17%
Bsnl 3G 2070 46 2024 2.22% 97.78%
Idea 2G 628 10 618 1.59% 98.41%
Reliance 3G 5098 3 5095 0.06% 99.94%
Telenor 2G 502 23 479 4.58% 95.42%
Vodafone 2G 720 8 712 1.11% 98.89%
Operators Total Call Established Total Call Drop CDR CCSR
Aircel 2G 349 9 2.58% 97.42%
Aircel 3G 298 10 3.36% 96.64%
Airtel 2G 351 1 0.28% 99.72%
Airtel 3G 294 6 2.04% 97.96%
Bsnl 2G 358 12 3.35% 96.65%
Bsnl 3G 310 39 12.58% 87.42%
Idea 2G 370 1 0.27% 99.73%
Reliance 3G 300 6 2.00% 98.00%
Telenor 2G 360 8 2.22% 97.78%
Vodafone 2G 363 4 1.10% 98.90%
Operators Total Call Attempt Blocked Calls Blocked Call Rate* CSSR
Aircel 2G 362 13 3.59% 96.41%
Aircel 3G 306 8 2.61% 97.39%
Airtel 2G 362 11 3.04% 96.96%
Airtel 3G 312 18 5.77% 94.23%
Bsnl 2G 369 11 2.98% 97.02%
Bsnl 3G 316 6 1.90% 98.10%
Idea 2G 371 1 0.27% 99.73%
Reliance 3G 306 6 1.96% 98.04%
Telenor 2G 366 6 1.64% 98.36%
Vodafone 2G 368 5 1.36% 98.64%
Appendix
Ancillary Details
6. City-Level KPI details
16
Call Events
Operators (Summary)
Aircel Airtel BSNL IDEA Reliance Telenor Vodafone
2G 3G 2G 3G 2G 3G 2G 3G 2G 2G
Call Attempt (September-16)
362 306 362 312 369 316 371 306 366 368
Blocked Call Rate (September-16)
3.59% 2.61% 3.04% 5.77% 2.98% 1.90% 0.27% 1.96% 1.64% 1.36%
CSSR (Accessibility) (September-16)
96.41% 97.39% 96.96% 94.23% 97.02% 98.10% 99.73% 98.04% 98.36% 98.64%
Dropped Call Rate (September-16)
2.58% 3.36% 0.28% 2.04% 3.35% 12.58% 0.27% 2.00% 2.22% 1.10%
Mobility HOSR (September-16)
94.65% 99.14% 97.73% 99.78% 78.17% 97.78% 98.41% 99.94% 95.42% 98.89%
Rx Quality (September-16)
86.49% 96.88% 93.63% 98.78% 92.78% 93.25% 95.04% 95.44% 91.32% 96.93%
Operators are meeting benchmark Operators not meeting benchmark