Contents

Drive Test summary

Analysis on coverage data

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DT 、 CQT

OMC

NO YES

Monitor the performance Analyze the data Order a scheme

Carry out scheme

Proving the scheme

Complain

It is important to take a DT and CQT in the network

DT and CQT

Test tools introduction

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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

Test tools introduction

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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

DT introduction

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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.

CQT Introduction

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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

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outline

Drive Test summary

Analyze the data about coverage

Analyze the data about service

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 areaSite is too high, it is not reasonable on antenna engineering parameters,

streets effect, etc

Overshooting

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overshootingSolution

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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

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Pilot Pollution Analysis

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 .

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

Pilot Pollution analysis

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Pilot Pollution Analysis

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solution:

make 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

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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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