SlideShare a Scribd company logo
1 of 33
Download to read offline
Drive Testing in Mobile
Networks
Presentation by:
Naveen Jakhar, ITS
& Chetan Sharma, ITS
What is Drive Testing:
2
• Drive Testing is a method of measuring and assessing the coverage, capacity
and Quality of Service (QoS) of a mobile radio network.
• Drive testing is principally applied in both the planning and optimization
stage of network development.
• Drive tests are the most common measurement tool used by operators, to
probe the quality status and solve network problems.
Why Drive Testing?
3
• To check deployment of new network sites in order to meet coverage,
capacity and quality requirements
• Optimization of the network
• Benchmarking of performance
• Trouble shooting
• To verify the performance after an upgrade or reconfiguration of the
network
Drive Testing:
4
• It is conducted for checking the coverage criteria of the cell site with the RF
drive test tool.
• The data collected by drive test tool in form of Log files are assessed to
evaluate the various RF parameters of the network.
• The technique consists of using a motor vehicle containing mobile radio
network air interface measurement equipment that can detect and record a
wide variety of the physical and virtual parameters of mobile cellular service
in a given geographical area.
Data Acquired from Drive Test:
5
The dataset collected during drive testing field measurements can include
information such as
• Signal intensity
• Signal quality
• Interference
• Dropped calls
• Blocked calls
Data Acquired from Drive Test…
6
• Call statistics
• Service level statistics
• QoS information
• Handover information
• Neighbouring cell information
• GPS location co-ordinates
Types of Drive Testing:
7
1. Network Benchmarking
2. Optimization & Troubleshooting
3. Service Quality Monitoring
The results produced by drive testing for each of these purposes is different.
Network Benchmarking:
8
• Sophisticated multi-channel tools are used to measure several network
technologies and service types simultaneously to very high accuracy and
collect accurate competitive data on the true level of their own and their
competitors technical performance and quality levels
Optimization and Troubleshooting:
9
• Optimization and troubleshooting information is more typically used to aid
in finding specific problems during the rollout phases of new networks or to
observe specific problems reported by consumers during the operational
phase of the network lifecycle.
Service Quality Monitoring:
10
• Service quality monitoring typically involves making test calls across the
network to a fixed test unit to assess the relative quality of various services
using Mean opinion score (MOS).
• Service quality monitoring is typically carried out in an automated fashion.
Equipment used in drive test:
11
• A laptop computer - or other similar device;
• Data collecting software installed on the laptop;
• A Security Key - Dongle - common to these types of software;
• One mobile phone for each mobile network that is being tested;
and
• One GPS antenna.
12
Test Methods:
14
Test Methods Purpose
Idle It is used to record the network condition at idle state and
the level and C/I on BCCH
Dedicated _Short Call
(120 sec)
It is mainly used for testing the accessibility and mobility of
network. Also used for checking successful completion of
call
Dedicated _Long Call
(entire duration of drive
test)
It is mainly used to test the retainability and sustainability.
e.g. Call drop rate, Handover Success rate, etc.
Analysis of Drive Test Data:
15
• The drive test data is collected through data collecting software
like TEMS.
• TEMS investigation 14.x and above.
• Test Mobile System(TEMS) is a technology used by telecom
operators to measure, analyse and optimise their mobile networks.
It is considered as basic tool to perform wireless network drive
testing, benchmarking and analysis.
Key Performance Indicators:
16
• Accessibility (Call set-up success rate) (%)
• Retainability (Dropped calls) (%)
• Mobility (Handover success rate) (%)
• RF Coverage (%)
• Rx Quality (%)
• Carrier over Interference (%)
Accessibility:
17
 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:
18
 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.
Mobility:
19
 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.
RF Coverage:
20
 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 %age of samples in which the receive level (Rx) is better
than -85 dbm at street level.
Rx Quality:
• For measuring voice quality, Rx Quality samples on a scale from 0 to 7 for
GSM operators are measured. As per the TRAI QoS norms, Rx Quality
between 0- 5 for GSM operators is considered to be good, whereas Rx
Quality beyond this benchmark is considered to be poor. TRAI has set down
the QoS norm requiring connections with good voice quality to be >95%.
21
Carrier over Interference (C/I):
• The carrier-over-interference ratio seeks to test the level of optimization of
the signal strength of a network. It is the ratio between the levels of the
signal strength of the current serving cell to that of the signal strength of
undesired or interfering signal components. The measurement range extends
from 0 dB to 30 dB. A C/I below 4 dB would normally result in a dropped
call. The C/I values between 9 and 15 is acceptable; while values between 15
and 30 are considered good.
22
QoS Parameters – Reporting by TSP
SN Name of parameter
Bench
mark
Averaged over a
period
A Network Service Quality Parameters:
(i) Network Availability
BTSs Accumulated downtime (not available service) ≤ 2% One Month
Worst affected BTSs due to down time ≤ 2% One Month
(ii) Connection Establishment (Accessibility)
Call Set - up Success Rate (with in licensee's own
network)
≥ 95% One Month
SDCCH/Paging Channel Congestion ≤ 1% One Month
TCH Congestion ≤ 2% One Month
(iii) Connection Maintenance (Retainability)
(a) Call Drop Rate ≤ 2% One Month
(b) Worst affected cells having more than 3% TCH drop
(call drop) rate
≤ 3% One Month
(c) connections with good voice quality (Rx Quality) ≥ 95% One Month
(iv) Hand Over Success Rate(HOSR) (Mobility) ≥ 95% One Month
(v) Carrier-over-interference ratio (C/I) >= 9dB One Month
Analysis:
24

Drive Test Route (Mumbai)
Accessibility (%):
25
Retainability (%):
26
Mobility (%):
27
RF Coverage (%):
28
Rx Quality (%):
29
Carrier over Interference (C/I) (%):
30
Overall Operator Analysis
31
Analysis of the RF drive report
32
33

More Related Content

What's hot

3 g huawei ran resource monitoring and management recommended
3 g huawei ran resource monitoring and management recommended3 g huawei ran resource monitoring and management recommended
3 g huawei ran resource monitoring and management recommended
Mery Koto
 
Hw lte rf-optimization-guide
Hw lte rf-optimization-guideHw lte rf-optimization-guide
Hw lte rf-optimization-guide
tharinduwije
 
1.training lte ran kpi & counters rjil
1.training lte ran kpi & counters rjil1.training lte ran kpi & counters rjil
1.training lte ran kpi & counters rjil
Satish Jadav
 
2 g and 3g kpi improvement by parameter optimization (nsn, ericsson, huawei) ...
2 g and 3g kpi improvement by parameter optimization (nsn, ericsson, huawei) ...2 g and 3g kpi improvement by parameter optimization (nsn, ericsson, huawei) ...
2 g and 3g kpi improvement by parameter optimization (nsn, ericsson, huawei) ...
Jean de la Sagesse
 

What's hot (20)

3 g huawei ran resource monitoring and management recommended
3 g huawei ran resource monitoring and management recommended3 g huawei ran resource monitoring and management recommended
3 g huawei ran resource monitoring and management recommended
 
TEMS PARAMETER (3G)
TEMS PARAMETER (3G)TEMS PARAMETER (3G)
TEMS PARAMETER (3G)
 
LTE KPI
LTE KPILTE KPI
LTE KPI
 
GSM Idle Mode Behavior
GSM Idle Mode BehaviorGSM Idle Mode Behavior
GSM Idle Mode Behavior
 
TEMS PARAMETERS
TEMS PARAMETERSTEMS PARAMETERS
TEMS PARAMETERS
 
Part 3 optimization 3G
Part 3 optimization 3GPart 3 optimization 3G
Part 3 optimization 3G
 
Hw lte rf-optimization-guide
Hw lte rf-optimization-guideHw lte rf-optimization-guide
Hw lte rf-optimization-guide
 
1.training lte ran kpi & counters rjil
1.training lte ran kpi & counters rjil1.training lte ran kpi & counters rjil
1.training lte ran kpi & counters rjil
 
LTE Call Processing and Handover
LTE Call Processing and HandoverLTE Call Processing and Handover
LTE Call Processing and Handover
 
4 lte access transport network dimensioning issue 1.02
4 lte access transport network dimensioning issue 1.024 lte access transport network dimensioning issue 1.02
4 lte access transport network dimensioning issue 1.02
 
Lte drive test parameters
Lte drive test parametersLte drive test parameters
Lte drive test parameters
 
LTE Architecture and LTE Attach
LTE Architecture and LTE AttachLTE Architecture and LTE Attach
LTE Architecture and LTE Attach
 
RSCP RSSI EC/NO CQI
RSCP RSSI EC/NO CQIRSCP RSSI EC/NO CQI
RSCP RSSI EC/NO CQI
 
Ericsson important optimization parameters
Ericsson important optimization parametersEricsson important optimization parameters
Ericsson important optimization parameters
 
Sdcch Blocking Analysis
Sdcch Blocking AnalysisSdcch Blocking Analysis
Sdcch Blocking Analysis
 
14 gsm bss network kpi (call setup time) optimization manual[1].doc
14 gsm bss network kpi (call setup time) optimization manual[1].doc14 gsm bss network kpi (call setup time) optimization manual[1].doc
14 gsm bss network kpi (call setup time) optimization manual[1].doc
 
Umts Kpi
Umts KpiUmts Kpi
Umts Kpi
 
Simplified Call Flow Signaling: 2G/3G Voice Call
Simplified Call Flow Signaling: 2G/3G Voice CallSimplified Call Flow Signaling: 2G/3G Voice Call
Simplified Call Flow Signaling: 2G/3G Voice Call
 
E2 e+call+setup+time+(cst)+enhacenments p3_benchmarking
E2 e+call+setup+time+(cst)+enhacenments p3_benchmarkingE2 e+call+setup+time+(cst)+enhacenments p3_benchmarking
E2 e+call+setup+time+(cst)+enhacenments p3_benchmarking
 
2 g and 3g kpi improvement by parameter optimization (nsn, ericsson, huawei) ...
2 g and 3g kpi improvement by parameter optimization (nsn, ericsson, huawei) ...2 g and 3g kpi improvement by parameter optimization (nsn, ericsson, huawei) ...
2 g and 3g kpi improvement by parameter optimization (nsn, ericsson, huawei) ...
 

Viewers also liked

Rf optimisation
Rf optimisationRf optimisation
Rf optimisation
Anto Radde
 
Extract from TEMS Investigation 17.0 Help
Extract from TEMS Investigation 17.0 HelpExtract from TEMS Investigation 17.0 Help
Extract from TEMS Investigation 17.0 Help
Peter Eriksson
 
Центр энергосбережения
Центр энергосбереженияЦентр энергосбережения
Центр энергосбережения
NikolayX
 
Pravda research for fmcg 2013
Pravda research for fmcg 2013Pravda research for fmcg 2013
Pravda research for fmcg 2013
ONLYPRAVDA
 

Viewers also liked (19)

Drive test using tems investation 16.1
Drive test using tems investation 16.1Drive test using tems investation 16.1
Drive test using tems investation 16.1
 
Drive Test Nemo
Drive Test NemoDrive Test Nemo
Drive Test Nemo
 
Rf optimisation
Rf optimisationRf optimisation
Rf optimisation
 
Mobile testing @ stughh
Mobile testing @ stughhMobile testing @ stughh
Mobile testing @ stughh
 
Mobile Testing: Challenges & Current Best Practices
Mobile Testing: Challenges & Current Best PracticesMobile Testing: Challenges & Current Best Practices
Mobile Testing: Challenges & Current Best Practices
 
A/B Testing in Mobile
A/B Testing in MobileA/B Testing in Mobile
A/B Testing in Mobile
 
Tips and Tools for Testing Mobile Interactions Remotely (and On a Budget!)
Tips and Tools for Testing Mobile Interactions Remotely (and On a Budget!)Tips and Tools for Testing Mobile Interactions Remotely (and On a Budget!)
Tips and Tools for Testing Mobile Interactions Remotely (and On a Budget!)
 
Extract from TEMS Investigation 17.0 Help
Extract from TEMS Investigation 17.0 HelpExtract from TEMS Investigation 17.0 Help
Extract from TEMS Investigation 17.0 Help
 
Academic Immersion in an LLC: USF’s ZAP Builds Social & Professional Relation...
Academic Immersion in an LLC: USF’s ZAP Builds Social & Professional Relation...Academic Immersion in an LLC: USF’s ZAP Builds Social & Professional Relation...
Academic Immersion in an LLC: USF’s ZAP Builds Social & Professional Relation...
 
Green Marrow is Commercial Property In Ahmedabad
Green Marrow is Commercial Property In AhmedabadGreen Marrow is Commercial Property In Ahmedabad
Green Marrow is Commercial Property In Ahmedabad
 
Family 1
Family 1Family 1
Family 1
 
Feel Universe With Krishna 99 Residential Flats In Ahmedabad
Feel Universe With Krishna 99 Residential Flats In AhmedabadFeel Universe With Krishna 99 Residential Flats In Ahmedabad
Feel Universe With Krishna 99 Residential Flats In Ahmedabad
 
Центр энергосбережения
Центр энергосбереженияЦентр энергосбережения
Центр энергосбережения
 
Pravda research for fmcg 2013
Pravda research for fmcg 2013Pravda research for fmcg 2013
Pravda research for fmcg 2013
 
Basics of SRAM
Basics of SRAMBasics of SRAM
Basics of SRAM
 
Resume Workshop
Resume WorkshopResume Workshop
Resume Workshop
 
ADC miscellaneous concepts
ADC miscellaneous conceptsADC miscellaneous concepts
ADC miscellaneous concepts
 
Green leaves home in ahmedabad
Green leaves home in ahmedabadGreen leaves home in ahmedabad
Green leaves home in ahmedabad
 
Pravda research for fmcg 2013
Pravda research for fmcg 2013Pravda research for fmcg 2013
Pravda research for fmcg 2013
 

Similar to Drive testing in mobile networks

Baker Charlie
Baker CharlieBaker Charlie
Baker Charlie
Carl Ford
 
Drive test golden rules
Drive test golden rulesDrive test golden rules
Drive test golden rules
Fidele Castro
 
A practical optimisation method to
A practical optimisation method toA practical optimisation method to
A practical optimisation method to
ijwmn
 
Wireless Quality
Wireless QualityWireless Quality
Wireless Quality
Clark_m
 

Similar to Drive testing in mobile networks (20)

Ijett v4 i10p113
Ijett v4 i10p113Ijett v4 i10p113
Ijett v4 i10p113
 
108401 2727+ijet-ijens
108401 2727+ijet-ijens108401 2727+ijet-ijens
108401 2727+ijet-ijens
 
U04505107111
U04505107111U04505107111
U04505107111
 
Call setup success_rate
Call setup success_rateCall setup success_rate
Call setup success_rate
 
FIELD TESTING of 2G 3G Devices.ppt
FIELD TESTING  of 2G 3G Devices.pptFIELD TESTING  of 2G 3G Devices.ppt
FIELD TESTING of 2G 3G Devices.ppt
 
Qo s requirement .
Qo s requirement .Qo s requirement .
Qo s requirement .
 
Pre_Sen_Ta_ion.pptx
Pre_Sen_Ta_ion.pptxPre_Sen_Ta_ion.pptx
Pre_Sen_Ta_ion.pptx
 
Developing service metrics
Developing service metricsDeveloping service metrics
Developing service metrics
 
Optimization
OptimizationOptimization
Optimization
 
Quality of service improvement, Handoff Prioritization and Channel utilizatio...
Quality of service improvement, Handoff Prioritization and Channel utilizatio...Quality of service improvement, Handoff Prioritization and Channel utilizatio...
Quality of service improvement, Handoff Prioritization and Channel utilizatio...
 
Baker Charlie
Baker CharlieBaker Charlie
Baker Charlie
 
LTE_Drive_Test_Theory_Tools_Preparation.pdf
LTE_Drive_Test_Theory_Tools_Preparation.pdfLTE_Drive_Test_Theory_Tools_Preparation.pdf
LTE_Drive_Test_Theory_Tools_Preparation.pdf
 
Difference between Quality of Service and Grade of Service (General description)
Difference between Quality of Service and Grade of Service (General description)Difference between Quality of Service and Grade of Service (General description)
Difference between Quality of Service and Grade of Service (General description)
 
Gsm introduction
Gsm introductionGsm introduction
Gsm introduction
 
Drive test golden rules
Drive test golden rulesDrive test golden rules
Drive test golden rules
 
A practical optimisation method to
A practical optimisation method toA practical optimisation method to
A practical optimisation method to
 
Wireless Quality
Wireless QualityWireless Quality
Wireless Quality
 
Improved Fuzzy Logic Controller for a Global Mobile Telecommunication Network
Improved Fuzzy Logic Controller for a Global Mobile Telecommunication NetworkImproved Fuzzy Logic Controller for a Global Mobile Telecommunication Network
Improved Fuzzy Logic Controller for a Global Mobile Telecommunication Network
 
SoftQL - Telecom Solutions
SoftQL - Telecom SolutionsSoftQL - Telecom Solutions
SoftQL - Telecom Solutions
 
RCS Service Monitoring - 1-to-1 Chat
RCS Service Monitoring - 1-to-1 ChatRCS Service Monitoring - 1-to-1 Chat
RCS Service Monitoring - 1-to-1 Chat
 

More from Naveen Jakhar, I.T.S

More from Naveen Jakhar, I.T.S (20)

Security in Embedded systems
Security in Embedded systems Security in Embedded systems
Security in Embedded systems
 
MNP sixth adendment regulations
MNP sixth adendment regulationsMNP sixth adendment regulations
MNP sixth adendment regulations
 
Penalty for violations of EMF radiation norms in India
Penalty for violations of EMF radiation norms in India   Penalty for violations of EMF radiation norms in India
Penalty for violations of EMF radiation norms in India
 
Inter-Ministerial R&D for EMF radiation guidelines
Inter-Ministerial R&D for EMF radiation guidelinesInter-Ministerial R&D for EMF radiation guidelines
Inter-Ministerial R&D for EMF radiation guidelines
 
GSM Link Budget
GSM Link BudgetGSM Link Budget
GSM Link Budget
 
UMTS Protocols
UMTS ProtocolsUMTS Protocols
UMTS Protocols
 
UMTS core network and its evolution
UMTS core network and its evolutionUMTS core network and its evolution
UMTS core network and its evolution
 
GSM Air Interface
GSM Air Interface GSM Air Interface
GSM Air Interface
 
Introduction to SIM and USIM
Introduction to SIM and USIMIntroduction to SIM and USIM
Introduction to SIM and USIM
 
Operating support subsystem (oss) presentation
Operating  support subsystem (oss) presentationOperating  support subsystem (oss) presentation
Operating support subsystem (oss) presentation
 
Journey of Evolution of UMTS and CDMA
Journey of Evolution of UMTS and CDMAJourney of Evolution of UMTS and CDMA
Journey of Evolution of UMTS and CDMA
 
Concepts of optical fiber communication
Concepts of optical fiber communicationConcepts of optical fiber communication
Concepts of optical fiber communication
 
Radio resource management in wcdma
Radio resource management in wcdmaRadio resource management in wcdma
Radio resource management in wcdma
 
Satellite Communication Theory
Satellite  Communication TheorySatellite  Communication Theory
Satellite Communication Theory
 
Presentation on satellite antenna
Presentation on satellite antennaPresentation on satellite antenna
Presentation on satellite antenna
 
Data communication basics
Data communication basicsData communication basics
Data communication basics
 
Over view of Transmission Technologies & Optical Fiber Communication
Over view of Transmission Technologies & Optical Fiber Communication Over view of Transmission Technologies & Optical Fiber Communication
Over view of Transmission Technologies & Optical Fiber Communication
 
Overview of Radio Communication
Overview of Radio CommunicationOverview of Radio Communication
Overview of Radio Communication
 
Internet of Things
Internet of ThingsInternet of Things
Internet of Things
 
GSM Base transceiver station
GSM Base transceiver stationGSM Base transceiver station
GSM Base transceiver station
 

Recently uploaded

Neurulation and the formation of the neural tube
Neurulation and the formation of the neural tubeNeurulation and the formation of the neural tube
Neurulation and the formation of the neural tube
SaadHumayun7
 
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
中 央社
 

Recently uploaded (20)

[GDSC YCCE] Build with AI Online Presentation
[GDSC YCCE] Build with AI Online Presentation[GDSC YCCE] Build with AI Online Presentation
[GDSC YCCE] Build with AI Online Presentation
 
TỔNG HỢP HƠN 100 ĐỀ THI THỬ TỐT NGHIỆP THPT VẬT LÝ 2024 - TỪ CÁC TRƯỜNG, TRƯ...
TỔNG HỢP HƠN 100 ĐỀ THI THỬ TỐT NGHIỆP THPT VẬT LÝ 2024 - TỪ CÁC TRƯỜNG, TRƯ...TỔNG HỢP HƠN 100 ĐỀ THI THỬ TỐT NGHIỆP THPT VẬT LÝ 2024 - TỪ CÁC TRƯỜNG, TRƯ...
TỔNG HỢP HƠN 100 ĐỀ THI THỬ TỐT NGHIỆP THPT VẬT LÝ 2024 - TỪ CÁC TRƯỜNG, TRƯ...
 
Word Stress rules esl .pptx
Word Stress rules esl               .pptxWord Stress rules esl               .pptx
Word Stress rules esl .pptx
 
Operations Management - Book1.p - Dr. Abdulfatah A. Salem
Operations Management - Book1.p  - Dr. Abdulfatah A. SalemOperations Management - Book1.p  - Dr. Abdulfatah A. Salem
Operations Management - Book1.p - Dr. Abdulfatah A. Salem
 
BỘ LUYỆN NGHE TIẾNG ANH 8 GLOBAL SUCCESS CẢ NĂM (GỒM 12 UNITS, MỖI UNIT GỒM 3...
BỘ LUYỆN NGHE TIẾNG ANH 8 GLOBAL SUCCESS CẢ NĂM (GỒM 12 UNITS, MỖI UNIT GỒM 3...BỘ LUYỆN NGHE TIẾNG ANH 8 GLOBAL SUCCESS CẢ NĂM (GỒM 12 UNITS, MỖI UNIT GỒM 3...
BỘ LUYỆN NGHE TIẾNG ANH 8 GLOBAL SUCCESS CẢ NĂM (GỒM 12 UNITS, MỖI UNIT GỒM 3...
 
Essential Safety precautions during monsoon season
Essential Safety precautions during monsoon seasonEssential Safety precautions during monsoon season
Essential Safety precautions during monsoon season
 
An Overview of the Odoo 17 Discuss App.pptx
An Overview of the Odoo 17 Discuss App.pptxAn Overview of the Odoo 17 Discuss App.pptx
An Overview of the Odoo 17 Discuss App.pptx
 
Neurulation and the formation of the neural tube
Neurulation and the formation of the neural tubeNeurulation and the formation of the neural tube
Neurulation and the formation of the neural tube
 
Basic Civil Engineering notes on Transportation Engineering, Modes of Transpo...
Basic Civil Engineering notes on Transportation Engineering, Modes of Transpo...Basic Civil Engineering notes on Transportation Engineering, Modes of Transpo...
Basic Civil Engineering notes on Transportation Engineering, Modes of Transpo...
 
slides CapTechTalks Webinar May 2024 Alexander Perry.pptx
slides CapTechTalks Webinar May 2024 Alexander Perry.pptxslides CapTechTalks Webinar May 2024 Alexander Perry.pptx
slides CapTechTalks Webinar May 2024 Alexander Perry.pptx
 
Capitol Tech Univ Doctoral Presentation -May 2024
Capitol Tech Univ Doctoral Presentation -May 2024Capitol Tech Univ Doctoral Presentation -May 2024
Capitol Tech Univ Doctoral Presentation -May 2024
 
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽會考英聽
 
Telling Your Story_ Simple Steps to Build Your Nonprofit's Brand Webinar.pdf
Telling Your Story_ Simple Steps to Build Your Nonprofit's Brand Webinar.pdfTelling Your Story_ Simple Steps to Build Your Nonprofit's Brand Webinar.pdf
Telling Your Story_ Simple Steps to Build Your Nonprofit's Brand Webinar.pdf
 
The Ultimate Guide to Social Media Marketing in 2024.pdf
The Ultimate Guide to Social Media Marketing in 2024.pdfThe Ultimate Guide to Social Media Marketing in 2024.pdf
The Ultimate Guide to Social Media Marketing in 2024.pdf
 
Behavioral-sciences-dr-mowadat rana (1).pdf
Behavioral-sciences-dr-mowadat rana (1).pdfBehavioral-sciences-dr-mowadat rana (1).pdf
Behavioral-sciences-dr-mowadat rana (1).pdf
 
Incoming and Outgoing Shipments in 2 STEPS Using Odoo 17
Incoming and Outgoing Shipments in 2 STEPS Using Odoo 17Incoming and Outgoing Shipments in 2 STEPS Using Odoo 17
Incoming and Outgoing Shipments in 2 STEPS Using Odoo 17
 
philosophy and it's principles based on the life
philosophy and it's principles based on the lifephilosophy and it's principles based on the life
philosophy and it's principles based on the life
 
INU_CAPSTONEDESIGN_비밀번호486_업로드용 발표자료.pdf
INU_CAPSTONEDESIGN_비밀번호486_업로드용 발표자료.pdfINU_CAPSTONEDESIGN_비밀번호486_업로드용 발표자료.pdf
INU_CAPSTONEDESIGN_비밀번호486_업로드용 발표자료.pdf
 
How to Manage Notification Preferences in the Odoo 17
How to Manage Notification Preferences in the Odoo 17How to Manage Notification Preferences in the Odoo 17
How to Manage Notification Preferences in the Odoo 17
 
....................Muslim-Law notes.pdf
....................Muslim-Law notes.pdf....................Muslim-Law notes.pdf
....................Muslim-Law notes.pdf
 

Drive testing in mobile networks

  • 1. Drive Testing in Mobile Networks Presentation by: Naveen Jakhar, ITS & Chetan Sharma, ITS
  • 2. What is Drive Testing: 2 • Drive Testing is a method of measuring and assessing the coverage, capacity and Quality of Service (QoS) of a mobile radio network. • Drive testing is principally applied in both the planning and optimization stage of network development. • Drive tests are the most common measurement tool used by operators, to probe the quality status and solve network problems.
  • 3. Why Drive Testing? 3 • To check deployment of new network sites in order to meet coverage, capacity and quality requirements • Optimization of the network • Benchmarking of performance • Trouble shooting • To verify the performance after an upgrade or reconfiguration of the network
  • 4. Drive Testing: 4 • It is conducted for checking the coverage criteria of the cell site with the RF drive test tool. • The data collected by drive test tool in form of Log files are assessed to evaluate the various RF parameters of the network. • The technique consists of using a motor vehicle containing mobile radio network air interface measurement equipment that can detect and record a wide variety of the physical and virtual parameters of mobile cellular service in a given geographical area.
  • 5. Data Acquired from Drive Test: 5 The dataset collected during drive testing field measurements can include information such as • Signal intensity • Signal quality • Interference • Dropped calls • Blocked calls
  • 6. Data Acquired from Drive Test… 6 • Call statistics • Service level statistics • QoS information • Handover information • Neighbouring cell information • GPS location co-ordinates
  • 7. Types of Drive Testing: 7 1. Network Benchmarking 2. Optimization & Troubleshooting 3. Service Quality Monitoring The results produced by drive testing for each of these purposes is different.
  • 8. Network Benchmarking: 8 • Sophisticated multi-channel tools are used to measure several network technologies and service types simultaneously to very high accuracy and collect accurate competitive data on the true level of their own and their competitors technical performance and quality levels
  • 9. Optimization and Troubleshooting: 9 • Optimization and troubleshooting information is more typically used to aid in finding specific problems during the rollout phases of new networks or to observe specific problems reported by consumers during the operational phase of the network lifecycle.
  • 10. Service Quality Monitoring: 10 • Service quality monitoring typically involves making test calls across the network to a fixed test unit to assess the relative quality of various services using Mean opinion score (MOS). • Service quality monitoring is typically carried out in an automated fashion.
  • 11. Equipment used in drive test: 11 • A laptop computer - or other similar device; • Data collecting software installed on the laptop; • A Security Key - Dongle - common to these types of software; • One mobile phone for each mobile network that is being tested; and • One GPS antenna.
  • 12. 12
  • 13.
  • 14. Test Methods: 14 Test Methods Purpose Idle It is used to record the network condition at idle state and the level and C/I on BCCH Dedicated _Short Call (120 sec) It is mainly used for testing the accessibility and mobility of network. Also used for checking successful completion of call Dedicated _Long Call (entire duration of drive test) It is mainly used to test the retainability and sustainability. e.g. Call drop rate, Handover Success rate, etc.
  • 15. Analysis of Drive Test Data: 15 • The drive test data is collected through data collecting software like TEMS. • TEMS investigation 14.x and above. • Test Mobile System(TEMS) is a technology used by telecom operators to measure, analyse and optimise their mobile networks. It is considered as basic tool to perform wireless network drive testing, benchmarking and analysis.
  • 16. Key Performance Indicators: 16 • Accessibility (Call set-up success rate) (%) • Retainability (Dropped calls) (%) • Mobility (Handover success rate) (%) • RF Coverage (%) • Rx Quality (%) • Carrier over Interference (%)
  • 17. Accessibility: 17  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.
  • 18. Retainability: 18  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.
  • 19. Mobility: 19  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.
  • 20. RF Coverage: 20  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 %age of samples in which the receive level (Rx) is better than -85 dbm at street level.
  • 21. Rx Quality: • For measuring voice quality, Rx Quality samples on a scale from 0 to 7 for GSM operators are measured. As per the TRAI QoS norms, Rx Quality between 0- 5 for GSM operators is considered to be good, whereas Rx Quality beyond this benchmark is considered to be poor. TRAI has set down the QoS norm requiring connections with good voice quality to be >95%. 21
  • 22. Carrier over Interference (C/I): • The carrier-over-interference ratio seeks to test the level of optimization of the signal strength of a network. It is the ratio between the levels of the signal strength of the current serving cell to that of the signal strength of undesired or interfering signal components. The measurement range extends from 0 dB to 30 dB. A C/I below 4 dB would normally result in a dropped call. The C/I values between 9 and 15 is acceptable; while values between 15 and 30 are considered good. 22
  • 23. QoS Parameters – Reporting by TSP SN Name of parameter Bench mark Averaged over a period A Network Service Quality Parameters: (i) Network Availability BTSs Accumulated downtime (not available service) ≤ 2% One Month Worst affected BTSs due to down time ≤ 2% One Month (ii) Connection Establishment (Accessibility) Call Set - up Success Rate (with in licensee's own network) ≥ 95% One Month SDCCH/Paging Channel Congestion ≤ 1% One Month TCH Congestion ≤ 2% One Month (iii) Connection Maintenance (Retainability) (a) Call Drop Rate ≤ 2% One Month (b) Worst affected cells having more than 3% TCH drop (call drop) rate ≤ 3% One Month (c) connections with good voice quality (Rx Quality) ≥ 95% One Month (iv) Hand Over Success Rate(HOSR) (Mobility) ≥ 95% One Month (v) Carrier-over-interference ratio (C/I) >= 9dB One Month
  • 30. Carrier over Interference (C/I) (%): 30
  • 32. Analysis of the RF drive report 32
  • 33. 33