4G Drive Test
In House Training
Indosat Ooredoo
1
CommTech Training
Center
KPI In LTE
Retainability
Service Integrity
Traffic
Mobility
KPI
Availability
Utilization
Accessbility
2
Optimization Workflow
N
Start
Problem
analysis
Optimization
Preparation
RF optimization
New site
integrated
Service test and
parameter
optimization
Single Site
Verification
80% sites
in the
cluster
ready?
3
Routine drive
test and
analysis
Y
Acceptance
criteria
satisfied?
Y
Optimization
finished
N
Accessibility
4
Retainability
Accessibility KPIs are used to measure the
probability whether services requested by
a user can be accessed within specified
tolerances in the given operating
conditions
Retainability KPIs are used to evaluate the
network capability to retain services
requested by a user for a desired duration
once the user is connected to the services
 RRC Setup Success Rate (service/Signalling)
 Call Setup Success Rate
 ERAB Setup Success Rate (VoIP/All)
 Call Drop Rate (VoIP)
 Service Drop Rate (All)
Utilization
5
Integrity
Utilization KPIs are used to evaluate the
capability to meet the traffic demand and
other characteristics in specific internal
condition
Retainability KPIs are used to evaluate the
network capability to retain services
requested by a user for a desired duration
once the user is connected to the services
 Resource Block Utilizing Rate
 Average CPU load
 Call Drop Rate (VoIP)
 Service Drop Rate (All)
Mobility
Retainability
Mobility is how easliy the user can move to
another place in connected mode without
disconnection
Traffic KPIs are used to measure the traffic
volume on the LTE Radio Access Network
(RAN).
 Intra-frequency Handover Success Rate
 Inter-frequency HO Success Rate
 Inter-RAT HO Success Rate
 Call Drop Rate (VoIP)
 Service Drop Rate (All)
Availability
Availability Ability to offer service by network
resource
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Radio Network Unavailability Rate
Network Optimization Methods
RF optimization involves adjustment of azimuth, tilts, antenna height, eNodeB transmit power, feature algorithms,
and performance parameters. Optimization methods in different standard are similar, but each standard has its ow
measurement definition
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RF Parameter in DT-Optimization
1. RSRP (Reference Signal Received Power, the
power of the reference signal, This is an LTE-specific
drive test parameter and it's used by devices to help
determine handover points)
2. Througput : The value from the UE to the ENodeB. We can measure two types such as
Download and Upload
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RF Parameter in DT-Optimization
SINR Signal-to-Noise ratio, which compares the strength of the signal to background noise
S : Indicates the power of measured usable signals. Reference signals (RS) and physical downlink
shared channels (PDSCHs) are mainly involved
I : Indicates the power of measured signals or channel interference signals from other cells in the
current system and from inter-RAT cells
N : indicates background noise, which is related to measurement bandwidths and receiver noise
coefficient
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Poor Coverage
Poor coverage happens when the signal quality is poorer than the optimization baseline in an
area, poor RSRP and poor RSRQ
Effect:
 Poor data throughput
 Poor voice quality
Solution:
 Check presence of shadowing
obstacles
 Site configuration adjustment
 Loss or attenuation check
 Add a new site
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Poor Coverage
Coverage Holes
Coverage holes, as known as blank spot, is the condition when there is no network coverage
Symptom:
UE can’t connect to the network
Effect:
Drop service for mobility users
No service for users in that area
Solution:
Analyze geographical environments and check the receive levels of adjacent eNodeB
Build radio link in the blank spot area from adjacent eNodeB
Adjust antenna azimuth and tilt
Deploy new eNodeB if coverage holes can’t be resolved by adjusting antenna
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Crossed Feeder
Crossed feeder is used to describe the problem that arises
when the feeders for two or more sectors in a site are
inadvertently connected incorrectly
Symptom:
 Uplink signal strength would be very poor
 Handover success rate would be very low
Crossed feeder
Effect:
 A greater degree of interference
 A poor uplink signal strength
 A poor performance of handover
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Solution:
 Switch the feeder due to appropriate sector
Overshooting
Overshooting is the condition when the cell coverage over propagates in space, causing excessive
interference to neighboring cell devices
Effect:




Handover to the fake neighbor relation
High interference
Decrease battery life of user equipment
Drop call
Solution:
 Antenna down tilt
 Transmit power optimization
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PCI Collision
PCI collision is the condition when two neigbor cells have the same PCI, while PCI confusion is the
condition when two cells in the network having the same PCI do not share a neighbor
Symptom:
 For PCI collision, UE can’t decode channels from serving cell
 For PCI confusion, serving cell can’t identify the target cell
for handover purposes
Effect:
 Reference signal overlapping
 Interference
 Inaccurate SINR estimates in the
serving cell
 Inefficient data transmission in
uplink and downlink
 Drop services
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Solution:
Reconfiguration PCI
allocation distribution
Additional:
There are another case of PCI collision called Mod 3 Collision and Mod
6 Collision. These cases happened because of the same PSS ID in the
same neighbourhood cells. The effect of these cases is make the
system longer to determine the serving cell.
Imbalance Uplink Downlink
Imbalance between uplink and downlink is the condition when eNodeB can’t receive uplink signals because
of limited power when UEs perform
random access or upload data
Symptom:
 UE transmit power reaches its maximum but still can’t meet
the requirement for uplink BLER
 The downlink DCH transmit code power reaches its
maximum but still can’t meet the requirement for downlink
BLER
Solution:
Effect:
 UE couldn’t access the network
 If UE could access the network,
then drop services happened
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 If no performance data is available, trace a single user in the OMC
equipment room to obtain uplink measurement reports on the Uu interface
 If performance data is available, check each carrier in each cell for
imbalance between uplink and downlink based on uplink and downlink
balance measurements
Creating New Project
2
1
1. Click Create New Project (in Project List)
2. Fill The Project name (Ex: LTE project)
then click Save & Close
3
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Open Project
3
1
2
1. Right click your project ex: LTE project (in
project list)
2. Choose Open Project
3. There’s a window explorer for your project
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Import Network Configuration (1)
1
1. Click File Import  Import Network
Configuration
2. Choose Format Text File
3. Fill Mapping Configuration
4. Click Site File  Open cell file
5. Checklist Tab in Column Delimiters
2
3
4
5
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Import Network Configuration (2)
1. Click Site Tab
2. Fill Internal Parameter according
Source field
1
2
Click & Drag
3
4
3. Click Sector Tab
4. Fill Internal Parameter according
Source field
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Import Network Configuration (3)
1. Click Carrier Tab
2. Fill Internal Parameter
according Source field
3. Click Import
1
2
Source Field that should
be filled (LTE):
1. Site_ID
2. Sector_ID
3. Air_Interface_Standar
d_(Default)
4. PCI
5. EARFN_DL
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Show network configuration
2
1
3
1. Right Click Sites in Cells Tab 
Click Send To Map View
2. OnlineMap: Choose GoogleMap
3. The result
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Cell Configuration (1)
3
4
1
2
1. Right Click ‘’the cellfile’’ which we
imported  Choose Edit View Options
2. Choose Edit View Options
3. Choose Site_Label Tab
4. Checklist Show Site_ID
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Cell Configuration (2)
1
2
4
3
1.
2.
3.
4.
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Choose Carrier_Label Tab
Checklist PCI
Click Apply and then OK
The result
Map View Options (1)
1
2
1. Click Layer & View Options
2. In cell config. Tab, choose Pie Beam
Width
3. Checklist Render solid pie
4. Sector/Labeling : Choose Smart
Labeling
5. Site Label Display : Choose Smart
Label Display
6. Click Apply and then OK
3
4
5
6
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Map View Options (2)
Result
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Import Drive Test Data
3
1
2
4
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5
1. FileImportImport
Drive Test Data
2. Click Select Data Format
& Add Files
3. Choose the logfiles
4. Fill target project and
target datasheet
5. Click Import
Create Composite Data
1
1. Choose Dataset Tab in
LTE project
2. Right click Composite
(integrated) 
Create/Edit Static
Composite Dataset
3. Click New composite
4. Fill New Composite
Name
5. Click OK
2
3
4
5
“A static composite data set
combines logfiles so that
they can be displayed as 1
drive in the map”
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Composite for MS 1
Drag
1. Click Logfiles which used
MS 1
2. Drag the MS 1
(Qualcomm_nmf1) to
Members of group
3. Click Save
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Composite for MS 2
1
6
2
3
5
4
Drag
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1. Click New composite
2. Fill New Composite
Name
3. Click OK
4. Drag the MS 2
(PCTel_nmf2) to
Members of group
5. Click Save
6. The result of composite
Show Parameter : RSRP #1
3
1
2
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Drag
Legend
1. Choose LTE Serving/Intra
Freq Neighbor Cell from
logfile of MS (ex:
Qualcomm nmf_1)
2. Choose RSRP parameter
3. Click and drag Top#1
RSRP to map view
4. Click Show/Hide Legend
to show or hide a legend
Show Parameter : SINR
3
1
Drag
2
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1. Choose LTE Serving Cell
Signal Quality from
logfile of MS (ex:
Qualcomm nmf_1)
2. Choose RS SINR (dB)
parameter & Click and
drag to map view
3. Click Show/Hide Legend
to show or hide a legend
Show Parameter : Throughput
3
1
Drag
2
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1. Choose LTE PHY
Throughput PDSCH from
logfile of MS (ex:
Qualcomm nmf_1)
2. Choose PDSCH Phy
Throughput (kbps)
parameter & Click and
drag to map view
3. Click Show/Hide Legend
to show or hide a legend
Pack Project to .rar/zip
1
3
2
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1. In Project List, Right click
our project “LTE project”
2. Choose Pack Project for
Sharing
3. Choose the location which
the data will saved, then
click Save
Export to Google Earth
3
1
2
1. In LTE project, Select Cells
Tab, Right click Base
2. Choose Export Version to
Google Earth KML/KMZ
file
3. The result of export site to
google earth
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