21 CDMA Optimization Process-38

Wireless Network Optimization Process

ZTE University

CDMA-BSS TeamUnR

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Main Content

Reasons of CDMA Network Optimization

Stages of CDMA Network Optimization

Test Methods Introduction

CDMA Network Maintenance Optimization

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n Practical environmental change worsens local coverage

n The increase of voice and data users debases the

network performance

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Main Content





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Stages of CDMA Net Optimization

Spectrumsweep

Requirementanalysis Work plan

Regulationchoices

Wirelessparameters

checkSingle

site checkCalibratio

n test

Pre-optimizatio

nevaluation

Clusteroptimizaion

Wholeoptimizationand post-

optimizationevaluation

Projectacceptance

Dataarchiving

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Requirement analysis

Spectrumsweep


Regulationchoices

Wirelessparameters

checkSingle


n test

Pre-optimizatio

nevaluation

Clusteroptimizaion



Projectacceptance

Dataarchiving

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Requirement analysis stage - content

n Acquire requirement information for coverage

n Acquire site information of present network

n Acquire system parameters configuration

n Acquire the existing problems in the present network

n confirm the acceptance standard of the project

n confirm test parameters configuration

n confirm the interface with the customerUn

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Regulation choices

Spectrumsweep


Regulationchoices

Wirelessparameters

checkSingle


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Pre-optimizatio

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Clusteroptimizaion



Projectacceptance

Dataarchiving

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Regulation choices stage - content

n Determine practical flow according to the requirement

analysis report and other information

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Work plan

Spectrumsweep


Regulationchoices

Wirelessparameters

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Pre-optimizatio

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Clusteroptimizaion



Projectacceptance

Dataarchiving

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Work plan stage - content

n Make out work plan according to the flow tailored

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Spectrum sweep

Spectrumsweep


Regulationchoices

Wirelessparameters

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Pre-optimizatio

nevaluation

Clusteroptimizaion



Projectacceptance

Dataarchiving

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Spectrum sweep stage - content

n Under the condition of being authorized by the customer,

scan and confirm frequency that is to be used to

guarantee clean frequency

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Spectrum sweep stage - interference

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Wireless parameters check

Spectrumsweep


Regulationchoices

Wirelessparameters

checkSingle


n test

Pre-optimizatio

nevaluation

Clusteroptimizaion



Projectacceptance

Dataarchiving

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Wireless parameterscheck stage - content

n Purpose

Confirm Background parameter is right.

n Check items

Including BSC & cell parameters, especially cell parameters

Including parameters about data & voice service

Emphasis: PN set, searching window, cell parameters,

access channel searching window & prefix, etc.

The check can be done along with single site check UnRe

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Single site check

Spectrumsweep


Regulationchoices

Wirelessparameters

checkSingle


n test

Pre-optimizatio

nevaluation

Clusteroptimizaion



Projectacceptance

Dataarchiving

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Single site check stage - content

n Purpose

n Guarantee normal work of all BTS, preparing for later optimization test.

n Check items

Antenna and feeder connection, antenna azimuth

Call flow test, including call start, being called, hanging up, handoff (and

softer handoff) and so on, examine the signal energy of transmission and

reception in the test process

System running check (ensuring there is no abnormal warning) Such as

standing wave rate warning, low power warning and so onUnRe

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Calibration test

Spectrumsweep


Regulationchoices

Wirelessparameters

checkSingle


n test

Pre-optimizatio

nevaluation

Clusteroptimizaion



Projectacceptance

DataarchivingUn

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Calibration test stage - content

n Correction test of test mobile out-car antenna

n Average penetration loss test of the car body

n Penetration loss test of buildings

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Pre-optimization evaluation

Spectrumsweep


Regulationchoices

Wirelessparameters

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n test

Pre-optimizatio

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Clusteroptimizaion



Projectacceptance

Dataarchiving

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Pre-optimization evaluation - content

n Assess the network before optimization and obtain practical running status

of the network for convenient contrast between before and after

optimization

n The purpose of assessment is to find out the existing problems in the

present network and give guides for the next network optimization

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Cluster optimization

Spectrumsweep


Regulationchoices

Wirelessparameters

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Pre-optimizatio

nevaluation

Clusteroptimizaion



Projectacceptance

Dataarchiving

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Cluster optimization stage - content

n Purpose

n Solve the existing network problems according to the different areas

n Remarks Divide the network into clusters and there are no more than 19

BTS for one cluster. Overlap is needed between the neighbor clusters.

Cluster division should be according to the practice which is usually based on the terrain and clutter or the existing problems during the assessment stage. The area that has special requirement for data or voice service is recommended to be divided into one cluster.

The optimization for different clusters can be done at the same or different time according to the resource and time needed.Un

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Cluster optimization stage optimization analysis

n Forward & reverse coverage analysis

n Pilot coverage analysis

n Pilot pollution analysis

n Soft handoff ratio analysis

n Tx_Adj analysis

n Forward & reverse FER analysis

n Call drop ratio analysis

n Call success ratio analysis

n Paging success rate analysis

n Access time analysis

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Whole optimization and post-optimization evaluation

Spectrumsweep


Regulationchoices

Wirelessparameters

checkSingle


n test

Pre-optimizatio

nevaluation

Clusteroptimizaion



Projectacceptance

DataarchivingUn

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Whole optimization and post-optimization evaluation - content

n Wireless index test

n Test result analysis

n Determine the adjusting scheme for the whole network

n Assessment for the whole network after optimization

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Project acceptance

Spectrumsweep


Regulationchoices

Wirelessparameters

checkSingle


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Pre-optimizatio

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Clusteroptimizaion



Projectacceptance

Dataarchiving

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Project acceptance - content

n Do the acceptance test to validate the network

performance indexes according to the contract. Test route

and methods should be determined according to the

contract or the demands discussed at the requirement

analysis stage. Normally the purchaser is demanded to

join the test.

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Data archiving

Spectrumsweep


Regulationchoices

Wirelessparameters

checkSingle


n test

Pre-optimizatio

nevaluation

Clusteroptimizaion



Projectacceptance

Dataarchiving

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Data archiving - content

n The related data about network optimization should be

archived after the acceptance.

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Main Content





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Test methods Driver test

n The route for DT test

Test path should be within the coverage range

Test path should avoid to repeating the same stretch

Get across the various clutters in the coverage area as

possible as we can

Run over all the specified area as possible as we can

Try to test at the same speed (30-50km/h)

Notes: test path should be determined through consulting

with the customer

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Test methodstest at the fixed area

Test at fixed area

v Slap-up dwelling area

v Bus/train station/airport

v Freeway

v Sightseeing points

v Key factories and mines

v Other key coverage areas

Employee dwelling areas

Prosperous business areas

Operator office areas

Operator business buildings

Government office buildings

Dense office buildings

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Main Content





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CDMA Wireless networkmaintenance optimization

n Maintenance optimization is an indispensable part of CDMA network optimization. It plays an key role in long stable system running.

n Maintenance optimization aims at finding equipment problems, discovering and solving network problems, locating resource utilization rate problems.

n The maintenance is to collect performance data of running network termly, analyze the data timely and therefore monitor network real-time running status and handle existing and latent problems timely to guarantee the normal running of the network. Un

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Maintenance optimization contents

n Finding equipment problems

n discovering and solving network problems

n locating resource utilization rate problems

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Documents

21 CDMA Optimization Process-38