The document discusses drive test and call quality test procedures for analyzing mobile network coverage and service performance. It provides an introduction to the test tools used, including phones and data cards that support UMTS, HSDPA, HSUPA, EDGE, and GPRS technologies. Key metrics analyzed include signal strength, quality, throughput rates, call setup success, handover success, call drops, and delays. Issues examined include overshooting, pilot pollution, and missing neighbors. Potential solutions involve adjusting antenna parameters, modifying configuration settings, and optimizing base station placement and power levels.

2. Contents
 Drive Test summary
 Analysis on coverage data
Page 2

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DT 、 CQ
T
OMC
NO YES
Monitor the performanceMonitor the performance Analyze the dataAnalyze the data
Order a schemeOrder a scheme
Carry out schemeCarry out scheme
Proving the schemeProving the scheme
Complain
It is important to take a DT and CQT in the network
DT and CQT

4. Test tools introduction
Page 4
Z750 （ phone ）
Support HSDPA/UMTS
Support
EDGE/GPRS/GSM
Support HSDPA 3.6Mbps
Support R99 PS 384kbps
HUAWEI M30 （ data card ）
Support HSUPA/HSDPA/UMTS
Support EDGE/GPRS/GSM
Support HSDPA 7.2Mbps
Support HSUPA 2Mbps

5. Test tools introduction
Page 5
 CPICH RSCP
 CPICH Ec/Io
 Pilot Path Count
 BLER
 Tx power
 Neighbours
 Throughput
 Log
 Coverage Analysis
 Overshooting Analysis
 Pilot Pollution Analysis
 Neighbours Analysis
 Call drop Analysis
 Delay Analysis
 Network KPI Analysis

6. DT introduction
Page 6
The aim of the test is to acquire the coverage data by the single base
station, cluster and the whole network as related to service on CS,
PS. Including signal strength indicator Ec, signal quality instruction
Ec/Io, service establish success rate, handover success rate,, call
drop rate, UL/DL average throughput rate, service establish delay and
so on, all of them are used to investigate the signal quality which is
covering network. Thus testing if the single station work is normal or
not, investigate the worse regional of performance in the network,
such as hardware issue, pilot pollution, cell level or system parameter
issue.

7. CQT Introduction
Page 7
CQT :call quality test
it is a fixed-point test, the main purpose is acquisition of data for the indoor
and outdoor, where is the signal quality, service establish, maintain and so on.
the aim of the test is to confirm if local signal quality is good or not, the
performance of service establishing and maintaining, it used to research the
issue on the network, especially optimized network issue in indoor and
outdoor, interference, wireless communication environment issue such as
complex and so on. The survey key is radio link signal quality, multipath
effect, service establish performance, cell level throughput rate and so on, but
it is also important to survey the performance of handover, and the Signal leak

8. Page 8
outline
Drive Test summary
Analyze the data about coverage
Analyze the data about service

9. Overshooting
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Some of the pilot signal are strong, it covers the area more than the planning
area, it make a discontinuous dominant pilot cell in other cell area
Site is too high, it is not reasonable on antenna engineering parameters,
streets effect, etc

10. Overshooting
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11. overshooting
Solution
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 Adjust the antenna for azimuth and tilt.
 Modified the parameter
Add the CPICH power
Adjust base station distribution, and reduce the height of the tower

12. Page 12
Pilot Pollution Analysis
Receive signal are similar strong or weak, but there are no main pilot cell 。Receive signal are similar strong or weak, but there are no main pilot cell 。
Receive signal It is usually having a enough good pilot signal, but all of
them are having weak Ec/Io .
Receive signal It is usually having a enough good pilot signal, but all of
them are having weak Ec/Io .
Most of the equipment support 3 maximum number active set on WCDMA,
if the similarity Ec/Io number is more than 3, so it is as to be a interference
for three active set.
Most of the equipment support 3 maximum number active set on WCDMA,
if the similarity Ec/Io number is more than 3, so it is as to be a interference
for three active set.
Reason: overshooting, distribute the site on circle, street effect, strong
reflection and so on, these are result of signal distortion
Reason: overshooting, distribute the site on circle, street effect, strong
reflection and so on, these are result of signal distortion

13. Pilot Pollution analysis
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14. Pilot Pollution Analysis
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solution:
make a main pilot service cell, and obtain a stronger signal than other neighbourmake a main pilot service cell, and obtain a stronger signal than other neighbour
 Adjust the antenna azimuth and tilt.
 Modify the parameter, CPICH power.
Adjust base station distribution, add a strong signal cell in
pilot pollution area

15. Page 15
Missing Neighbour
Neighbours are likely to join in active set of cells, its is possible to
make a reselection or handover with other cells,
When the phone is stay in DCH state, it will send the neighbour
information by the RNC of managing measure, it is managing mobile
phone to measure all of receiving neighbour signal, if it is missing
nieghbour, it will result in drop call due to handover failure.
When the mobile phone stays in idle and FACH state, the phone must
obtain the neighbour information from system message, and measure
the neighbour which meet the requirements, if it is missing nieghbour, it
will result in reselecting not in time or call setup failure;

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