1. Consulting| Training| Research
LTE DT Theory, Tools and Preparation
• Its Time to Work smart not work hard
Author: Andreas YDN
Co-Author: ValkiRD
2. Consulting| Training| Research
Objective
• Understand Drive Test basic principals
• Know the basic parametersin DT 4G
• Concept both SSV and Cluster DT 4G
• Able to do DT 4G both ssv or cluster and not just collect the
data but analyze!!!
• Reporting with basic standard
3. Consulting| Training| Research
Drive Test Conceptual
- Drive test is conducted for checking coverage criteria of a cell with RF
- The data collected by drive test tool as log files is analyzed to evaluated various RF
parameters of the network
4. Consulting| Training| Research
Major QOS KPI (LTE)
1. Accessibility = How easily user can access the network for innitiate
communication
2. Retainability = how easily to keep the network at the good performance
5. Consulting| Training| Research
Major QOS KPI (LTE)
3. Mobility = how easliy the user can move to another place in connected mode
without disconnection
4. Integrity = How big the traffic in the network
6. Consulting| Training| Research
Major Parameter at DT LTE
1. RSRP (Reference Signal Received Power, the power of the reference signal, This is an
LTE-specific drive test parameter and is used by devices to help determine handover
points)
2. SINR: Signal-to-Noise Ratio, which compares the strength of the signal to
background noise.
-70 dBm to -90 dBm → Good
-91 dBm to -110 dBm → Normal
-110 dBm to -130 dBm → Bad
16 dB to 30 dB → Good
1 dB to 15 dB → Normal
-10 dB to 0 dB → Bad
7. Consulting| Training| Research
Major QOS KPI (LTE)
3. Throughput : the value from the UE to the EnodeB. We can measure two types such
as Download and Upload
4. Call Drop: Disconnection event while make a call.
8. Consulting| Training| Research
Important thing to DT efficient and effective
1. The parameter: a lot of DT Engineer didn’t know what he do while drive testing, it
have so many value inside the tools, but they just collect it without understand
what the definitioneach parameter
9. Consulting| Training| Research
2. Route: Don’t make double job at the same route,it will waste your time. Please
be aware with your route and don’t duplicateit.
10. Consulting| Training| Research
3. Event: event is the most important thing, you can see when the event call drop,
handover failure and make the analyze at that time. So you can explain to your RF
Engineer what you have done in your work
11. Consulting| Training| Research
4. DT strategy: the main important thing in LTE is Throughput, that value is makes
differrence between another technology such as 3G / 2G. Please make sure you
record your DT in stable condition(Filezillastill copying file)
- Open large file
- Open 3 file zilla
12. Consulting| Training| Research
5. Be active to analyze: some of DT engineer spent all the day to collect the data without
knowing the result, it better for you to focus on your work and see if there any crossfeeder,
bad spot result, or site Down,etc
A. Cross Feeder: which cell is cross feeder?
14. Consulting| Training| Research
Spesification and Supporting Software
1. Supporting Hardware
- Laptop (windows Xp / 7,RAM min 2GB, Processor min
Core i3)
- GPS NMEA
- USB LTE modem Huawei E398S
2. Supporting software
- Genex Probe and Genex Assistant(min v3.5)
- Filezilla
- Browser
15. Consulting| Training| Research
Software Installation
1. USB GPS NMEA
Do not connect the GPS before installation,it will change the ESN number
InstallGPS NMEA’s driver from yourchoosen directory
After installation finish,connect the USB GPS NMEA to laptop
16. Consulting| Training| Research
How To Drive Test Using Genex Probe V 3.5
Open Probe V3.5 then connect LTE Dongle and USB GPS
Klik Configure -> Device management-> Device configure
add the MS, by following this below picture and choose the related COM port
21. Consulting| Training| Research
Import Engineering Paramete:Configuration->Engineering parameter
management-> import -> then choose LTE system, click browsse and choose the
engineering parameter in xls format. Then click OPEN
24. Consulting| Training| Research
4. Set test
parameters
1. Add test
2. Choose
equipment
3. Test
state
5. Test
statistic
Set different parameter according to different test,
for example FTP Download
