gsm network optimization express-kpi pocket book v1.pdf

Suitable for staff with P&O skill certificate IV or lower

Issued by GSM Network P&O Dept.

KPI Pocket BookKPI Pocket Book

GSM Network Optimization GSM Network Optimization ExpressExpress

Internal Use Only▲

Version Introduction

Version

Date Writer Assessor Translator Amendment records

V1.0 2009-04-24 Jiang Yi Zheng Hao Feng Xiao Ying First edition


Brief Introduction

I. Introduction to KPIs

II. Monitoring of KPIs

III. Optimization of ordinary KPIs


I. Introduction to KPIs

1. What is KPI? Why we are concerned about KPI?

2. Classification of ordinary KPIs

3. Relations between KPIs

4. Ordinary KPIs

5. Which KPIs in CN deserve more attention?

6. Which are the most important KPIs?

7. How to understand the KPIs?

8. Limit value of KPIs in ZTE systems


1. What is KPI? Why we are concerned about KPI?

KPI is the abbreviation of Key Performance Indicator.

During the process of GSM network operation and

maintenance, OMCR statistics and various tests are

applied to evaluate and quantify network operation

quality. The evaluation results are the KPIs we talk about.

KPI is the abbreviation of Key Performance Indicator.

During the process of GSM network operation and

maintenance, OMCR statistics and various tests are

applied to evaluate and quantify network operation

quality. The evaluation results are the KPIs we talk about.

KPI is the abstract expression of network operation

quality.

Reasonable and complete KPIs can directly reflect

network operation quality, and they are the symbol of

network operation status.

By focusing on changes of KPIs, we can obtain the clear

trend of changes in network operation quality.

KPI is the abstract expression of network operation

quality.

Reasonable and complete KPIs can directly reflect

network operation quality, and they are the symbol of

network operation status.

By focusing on changes of KPIs, we can obtain the clear

trend of changes in network operation quality.


2. Classification of ordinary KPIs (1)

By service type: PS service KPIs, CS service KPIs

By test method: statistical KPIs, test KPIs

By GSM network functions & service phases: ZTE KPIs are classified into five categories.

By service type: PS service KPIs, CS service KPIs

By test method: statistical KPIs, test KPIs

By GSM network functions & service phases: ZTE KPIs are classified into five categories.


2. Classification of ordinary KPIs (2)

According to the observation range, KPIs can also be divided

into basic KPIs and integrated KPIs.

According to the observation range, KPIs can also be divided

into basic KPIs and integrated KPIs.

Integrated KPIs are the weighted superposition of several

indicators, which are obtained through consideration of

indicators at different stages of a process.

Integrated KPIs are the weighted superposition of several

indicators, which are obtained through consideration of

indicators at different stages of a process.


3. Relations between KPIs

There is mutual influence between different KPIs. Basic indicators

(of availability or resources ) often have great impact on other

types of indicators, and indicators of accessibility, reliability and

mobility are more related to subscribers’ satisfaction.

Subscribers’ satisfaction


4. Ordinary KPIs

⑤ Reliability

performance

④ Mobility

performance

③ Accessibility performance

② Radio

performance

① Availability

performance

üChannel

availability

üTotal no. of good

TRXs

üNo. of usable

channels

üCoverage rate

üSample proportion of

UL/DL voice quality of

class 0-4

üStatistics of UL

interference band of 4－5

üMOS value

üRadio system

connection rate

üCongestion rate

üAssignment success

rate

üRandom access

success rate

üDT/CQT connection

rate

üTBF establishment

success rate

üAttach success

rate/time

üPDP activation

success rate

üCall drop rate

üMinute per drop

üProportion of bad cells

üDistance per drop

üCall quality problems

(noise/monologue/cross-

talk)

üHandover success

rate

üLocation update

success rate

CSservice

PSservice

üNo. of usable

PDCH

üRetransmission

rate

üRoute update

success rate

üTBF failure rate

üFTP

download/upload

throughput


4. Ordinary KPIs -Availability

q SDCCH availability

m Function & collection method:

• It’s used to evaluate the stability of BTS, BSC equipment operation.

• It’s collected at OMCR and contains indicators of cell, single site and BSC level.

m Definition: SDCCH availability＝total SDCCH usable*100%/（ total SDCCH usable +total of SDCCH unusable）

q TCH availability


• It’s used to evaluate the stability of BTS, BSC equipment operation.


m Definition: TCH availability = （ average no. of radio channels usable + no. of TCH/F static usable + no. of TCH/H static usable）*100%/（ average no. of radio channels usable + no. of TCH/F static usable + no. of TCH/H static usable + average no. of radio channels unusable + no. of TCH/F static unusable + no. of TCH/H static unusable）

q Total of good TRXs


• It’s used to evaluate the stability of BTS equipment operation


m Definition: total of good TRXs＝ all the usable TRXs configured in the cells


4. Ordinary KPIs -Radio performanceq Coverage rate: (DT statistics, SUB value)


• It represents the overall situation of major radio network coverage.

• It’s collected through DT.

m Definition: coverage rate=[total no. of samples( >=-94dbm) ]/total no. of samples ×100％

q Ratio of UL/DL voice samples band 0-4 (define ratio of different bands

according to real needs)


• It mainly assesses the overall UL/DL speech quality.

• It’s collected at OMCR or through CQT and DT.

m Definition: Ratio of UL/DL voice samples band ＝(total no. of UL/DL band 0-4 samples)/(total no. of UL/DL samples)×100％

q Statistics of UL interference band 4－5


• It mainly assesses uplink external interference strength.

• It’s collected at OMCR and contains indicators of cell, single site and BSC level.m Definition: statistics of UL interference band 4-5=sum of UL interference band sampling statistics

4-5/total of interference band sampling statistics×100％


4. Ordinary KPIs – Accessibility (CS) (1)q SDCCH congestion rate


• It mainly assesses the SDCCH congestion status during the process of accessing network.


m Definition: SDCCH congestion rate(%) =No. of SDCCH overflows/total of SDCCH attempts× 100%

q SDCCH assignment success rate


• It mainly assesses the situation of MS being assigned to SDCCH when it accessing network.


m Definition: SDCCH assignment success rate＝No. of SDCCH assignment success times/ No. of SDCCH assignment attempts×100％

q TCH congestion rate


• It assesses TCH congestion status during the process of accessing network.


m Definition: TCH congestion rate= No. of TCH overflows/ No. of TCH attempts× 100%

q TCH assignment success rate


• It mainly assesses the situation of MS being assigned to TCH when it accessing network.

• It’s collected at OMCR and contains indicators of cell, single site and BSC level.m Definition: TCH assignment success rate= total of TCH seizures (excl. HO)/total of busy hour TCH

attempts×100％


4. Ordinary KPIs – Accessibility (CS) (2)

q Success rate of random access


• It assesses the success rate of random access (excl. congestion).


m Definition: success rate of random access＝(1- signaling channel congestion rate)*(1-voice channel congestion rate)*100%

q Connection rate of radio system (China Unicom definition)


• It assesses the average rate of successful connection between MOC and MTC.

• It can be obtained by calculating several indicators, of which the paging success rate is collected from MSC, and other indicators are at least of BSC level.

m Definition: connection rate of radio system ＝rate of MOC*success rate of random access*TCH allocation success rate (excl. HO) +(1-rate of MOC)*paging success rate* TCH allocation success rate (excl. HO)

q Call set-up success rate


• It assesses the success rate of call set-ups between MOC and MTC.


m Definition: call set-up success rate＝(1-SDCCH congestion rate)* (1-SDCCH assignment failure rate)*(1-SDCCH drop rate)*(1-TCH congestion rate)*(1-TCH assignment failure rate)

Internal Use Only▲4. Ordinary KPIs – Accessibility (PS) (1)

q UL/DL TBF establishment success rate


• It assesses the situation of successful PS access requests, which is a very important indicator to represent PS availability.


m Definition: (total of GPRS UL/DL signaling TBF establishment times+ total of GPRS UL/DL data TBF establishment times + total of EGPRS UL/DL signaling TBF establishment times + total of EGPRS UL/DL data TBF establishment times) / total DL packet channel request times*100%

q UL/DL retransmission rate


• It is the most important indicator to assess subscribers’ perception of service and reflect system problems like instability, congestion, interference, ect..


m Definition: No. of UL/DL TBF NACK blocks*100%/ No. of valid data blocks received by UL/DL TBF*100%

q Attach success rate


• It assesses the success rate of MS attaching to PS network, which is an indicator to evaluate the availability of PS network.

• It can be collected through CQT.m Definition: No. of Attach success times/Total of Attach attempts×100％

q PDP activation success rate


• It assesses the success rate of PDP context activation in PS service, which is an indicator to evaluate the availability of PS network.

• It can be collected through CQT.m Definition: PDP activation success rate= No. of PDP activation success times/ total of PDP activation

attempts×100％


4. Ordinary KPIs – Accessibility (PS) (2)

q Average Attach time length


• It assesses the average time length needed for MS attaching to PS network.

• It can be collected from CQT.

m Definition: average Attach time=sum of all successful Attach time/No. of Attach success times

q Average PDP activation time length


• It assesses the average time of PDP context activation in PS service.

• It can be collected from CQT.m Definition: sum of all successful PDP activation time/No. of PDP activation times

q PING success rate


• It assesses the success rate of transmitting data of interfaces like SGSN, GGSN in PS network.

• It can be collected from CQT.m Definition: PING success rate=No. of Ping success times/No. of Ping attempts*100%

q Average PING time length


• It assesses the delay in data transmission of interfaces like SGSN, GGSN in PS network; the smaller the Ping packet is, the better the transmission effect will be.

• It can be collected from CQT.m Definition: Average PING time length=Sum of time length of Ping successes /No. of Ping

attempts*100%


4. Ordinary KPIs – Mobility

It assesses the mobile services of network.It assesses the mobile services of network.

q Handover success rate

m Function & collection method:• It assesses handovers during mobile communications.

• It’s collected at OMCR or through DT.

m Definition: Handover success rate (%)=(No. of handover success/No. of handover requests)X100%


4. Ordinary KPIs – Reliability (CS)

q TCH call drop rate


• It assesses the network reliability during calls, which is closely related to radio environment.

• It can be collected at OMCR or through CQT and DT.

m Definition:

TCH call drop rate (excl HO)= No. of voice channel drops/No. of voice channel seizures (excl. HO)×100％

TCH call drop rate (incl. HO)=No. of voice channel drops/No. of voice channel seizures (incl. HO)×100％

q Traffic call drop rate


• It assesses the rate of traffic volume to call drops, which represents the interval between two call drops.

• It can be obtained from OMCR statistics of at least BSC level.

m Definition: traffic call drop rate=total busy hour voice channel traffic× 60/total busy hour voice channel call drops

q Worst cell rate

m Condition:• Busy hour traffic per voice channel>0.1Erl, voice channel call drop rate >3％ or voice channel

congestion rate >5％.• Define number of worst cells according to the condition that traffic per TCH>0.1, which can be

collected at OMCR.

m Worst cell rate=No. of worst cells/total of cells× 100%


4. Ordinary KPIs – Reliability (PS)

q PDTCH drop rate


• It assesses the reliability and stability of PS in the process of download.

• It can be collected through CQT and DT.

m Definition: PDTCH drop rate=No. of PDTCH drops/total FTP download attempts*100％

q FTP download data throughput


• It assesses the average data throughput of FTP download, which is related to no. of channels, coding modes and the situation that whether EDGE is supported or not.

• It can be collected through CQT.

m Definition: FTP download data throughput=actual successfully downloaded data volume/total successful download time

q FTP upload data throughput


• It assesses average data throughput of FTP upload, which is related to no. of channels, coding modes and the situation that whether EDGE is supported or not.

• It can be collected through CQT.

m Definition: FTP upload data throughput=actual successfully uploaded data volume/total successful upload time


q Paging success rate


• It assesses the rate of successful response during MTC paging process.

• It can be collected at OMCR of MSC side.

m Definition: paging success rate=no. of paging response*100%/no. of paging requests

q Location update success rate


• It assesses the success rate of MS updating location in the network.

• It can be collected at OMCR of MSC side.

m Definition: location update success rate=no. of successful location update*100%/no. of location update requests

q Attach success rate


• It assesses the success rate of MS attaching to PS network.

• It can be collected at NC SGSN side of PS service.

m Definition: Attach success rate=no. of successful attaches*100%/total of attach attempts

5. Which KPIs in CN deserve more attention? (1)


q PDP context activation success rate

m Function & collection method:• It assesses the success rate of MS-started PDP context activation.

• It can be collected at GGSN of PS CN.

m Definition: PDP context activation success rate＝no. of MS-started PDP context activation success times*100%/MS-started PDP context activation attempts

q Route area update success rate

m Function & collection method:• It assesses the success rate of MS updating route area in the network.

• It can be collected at SGSN of PS CN.

m Definition: route area update success rate=no. of route update success times*100%/no. of route update attempts

5. Which KPIs in CN deserve more attention? (2)


6. Which are the most important KPIs?

p Compared with basic KPIs, integrated KPIs offer a more

comprehensive reflection of network performance, and it needs

monitoring on a daily basis.

p Compared with other indicators, those which are more closely related

to subscribers’ satisfaction are of greater importance.

p Compared with basic KPIs, integrated KPIs offer a more

comprehensive reflection of network performance, and it needs

monitoring on a daily basis.

p Compared with other indicators, those which are more closely related

to subscribers’ satisfaction are of greater importance.

m Radio system connection rate/ call set-up success ratem Call drop ratem Handover success ratem UL/DL quality rank 0~4m Channel availabilitym TBF establishment success rate

m Coverage ratem RXQUAL/MOSm Call connection ratem Call drop ratem Handover success ratem Attach success ratem FTP download speedm Call connection time

OMCR statistics

DT statistics


7. How to understand the KPIs? (1)

KPIs Meaning Influencing factors Ideal valueReference

value

Radio system connection rate (China Unicom)

It represents the success rate of MS accessing to network.

With various factors (accessing process) taken into consideration, paging and congestion have more influence on the indicator.

The higher the better

94%

Call drop rate It represents the probability of drops in calls.

Areas: the rate is lower in dense urban; it’s higher in suburb, villages or mountain areas.

The lowerthe better

1％

Handover success rate

It represents the success rate of handovers during calls.

It tends to be affected by radio environment and setting of parameters.


95％

Ratio of UL/DL quality rank0～4

It represents the proportion of voice quality above rank4.

It tends to be affected by radio environment and interferences.


95％


7. How to understand the KPIs? (2)

KPIs Meaning Influencing factors Ideal valueReference

value

Channel availability

It represents the proportion of time when network equipment operates normally.

It’s related to equipment, power and transmission stability.

>98%, the higher the better

98％

Coverage rate It represents the rate of network coverage range.

Areas: the rate is higher in dense urban; it’s lower in suburb, villages or mountain areas.

the higher the better

92％～99％

MOS value It’s the objective assessment of voice quality base on auditory experience.

Radio environment, interference situation, handover frequency and error frame rate, etc.


3～3.5

TBF establishment success rate

It represents the success rate of response to the request for PS resource.

It tends to be affected by radio environment, setting of parameters and resource condition.


92%～95%


8. Limit value of KPIs in ZTE systems

Network operation will inevitably be affected by radio

environment, since it is complicated and changeable.

Besides, there are limitations in GSM technology and

equipment performance, so many KPIs have limit values.

Network operation will inevitably be affected by radio

environment, since it is complicated and changeable.

Besides, there are limitations in GSM technology and

equipment performance, so many KPIs have limit values.

KPI Limit value

SDCCH assignment success rate 98％

TCH assignment success rate 99.4％

Call drop rate (excl. HO) 0.3％

Paging success rate 96.5％

Handover success rate 98％


II. Monitoring of KPIs

1. How is KPI monitoring operated?

2. Which KPIs are to be monitored?

3. What non-optimization-related factors affect KPIs?

4. How to judge whether non-optimization-related

factors have affected KPIs?

5. Which key optimization-related factors influence

KPIs?

6. How to realize monitoring of global KPIs?

7. How to score in KPI monitoring process?

8. What is the alarm threshold of KPI deterioration?


1. How is KPI monitoring operated?

KPI monitoring: select key KPIs; extract or test these KPIs at

regular intervals (on a daily /weekly basis); make cumulative

record of the KPIs values, then a trend of KPIs changes in a

period will be obtained.

KPI monitoring: select key KPIs; extract or test these KPIs at

regular intervals (on a daily /weekly basis); make cumulative

record of the KPIs values, then a trend of KPIs changes in a

period will be obtained.

OMM SERVEROMM SERVER


2. Which KPIs are to be monitored?

We can select and monitor KPIs with different levels of details

according to the frequency and cycle of monitoring. Only the

most important KPIs are to be monitored during daily

network maintenance.

We can select and monitor KPIs with different levels of details

according to the frequency and cycle of monitoring. Only the

most important KPIs are to be monitored during daily

network maintenance.

m Radio system connection

rate/ call set-up success

rate

m Handover success rate

m Call drop rate

m UL/DL quality rank0~4

m Channel availability

m TBF establishment

success rate

m Traffic volume


3. What non-optimization-related factors affect KPIs?

Since GSM network is a large and complex system, its

operation quality may be affected by various kinds of non-

optimization-related factors, which will eventually be

displayed through changes in KPIs.

Since GSM network is a large and complex system, its

operation quality may be affected by various kinds of non-

optimization-related factors, which will eventually be

displayed through changes in KPIs.


3. Factors affecting KPIs? –Stability of system operation

Stable system operation is the basis of good network quality,

which is the basic work of network routine maintenance. KPIs

for assessing system stability are:

qNo. of alarms of different levels

qRadio channel availability

Stable system operation is the basis of good network quality,

which is the basic work of network routine maintenance. KPIs

for assessing system stability are:

qNo. of alarms of different levels

qRadio channel availability

Internal Use Only▲3. Factors affecting KPIs? –Stability of power supply / radio transmission

Since GSM is a large network system, power supply and

radio transmission is the most important auxiliary system in

it, which is also the basic support system of the whole

network. The status of power supply and radio transmission

directly will affect network operation quality.

In some overseas networks, power generator and micro wave

transmission system are the major components of power

supply and radio transmission. The maintenance ability and

effect of the two components are the key to network

operation quality.

Since GSM is a large network system, power supply and

radio transmission is the most important auxiliary system in

it, which is also the basic support system of the whole

network. The status of power supply and radio transmission

directly will affect network operation quality.

In some overseas networks, power generator and micro wave

transmission system are the major components of power

supply and radio transmission. The maintenance ability and

effect of the two components are the key to network

operation quality.


3. Factors affecting KPIs? –Project quality

Project installation and tuning quality directly decides the

efficiency and cost of network optimization in later stage.

Installation quality of antenna system has the most obvious impact

on network performance.

Project installation and tuning quality directly decides the

efficiency and cost of network optimization in later stage.

Installation quality of antenna system has the most obvious impact

on network performance.


3. Factors affecting KPIs? –Limitation in system resources

Network construction and development is a spiral process.

When the number of subscribers exceeds the planned

network capacity, expansion of system resources is needed.

In some cases, if system resources can not be timely and

effectively expanded, accessibility KPIs will be obviously

affected.

Network construction and development is a spiral process.

When the number of subscribers exceeds the planned

network capacity, expansion of system resources is needed.

In some cases, if system resources can not be timely and

effectively expanded, accessibility KPIs will be obviously

affected.

Internal Use Only▲3. Factors affecting KPIs? –Radio environment/geographical conditions

Usually in areas with complex geographical conditions

(mountains, seaside), KPIs tend to be heavily influenced.

Weather and temperature often have great impact on radio

environment, which may cause obvious fluctuations in KPIs.

Usually in areas with complex geographical conditions

(mountains, seaside), KPIs tend to be heavily influenced.

Weather and temperature often have great impact on radio

environment, which may cause obvious fluctuations in KPIs.


3. Factors affecting KPIs? –Abnormal subscriber behavior

Normally subscribers’ calling behavior is stable, and network

design and planning are based on common traffic models.

While in some special periods or occasions (major holidays

or meetings), subscribers’ calling behavior may change,

which creates abnormal traffic models and lead to severe

fluctuations in KPIs.

Normally subscribers’ calling behavior is stable, and network

design and planning are based on common traffic models.

While in some special periods or occasions (major holidays

or meetings), subscribers’ calling behavior may change,

which creates abnormal traffic models and lead to severe

fluctuations in KPIs.


4. How to judge whether non-optimization-related factors have affected KPIs?(1)

We can judge whether it is some non-optimization-related

factors that have caused the fluctuations in KPIs through

comprehensive observation and analysis of information from

different aspects.

We can judge whether it is some non-optimization-related

factors that have caused the fluctuations in KPIs through

comprehensive observation and analysis of information from

different aspects.


4. How to judge whether non-optimization-related factors have affected KPIs?(2)

p Availability KPIs are to reflect stability of the whole network operation,

which is a commonly used base of judging network stability.

p KPIs of traffic and no. of MOC reflect the overall behavior of subscribers.

p Serious alarms can directly and obviously affect KPIs, so they should

be solved immediately.

p Availability KPIs are to reflect stability of the whole network operation,

which is a commonly used base of judging network stability.

p KPIs of traffic and no. of MOC reflect the overall behavior of subscribers.

p Serious alarms can directly and obviously affect KPIs, so they should

be solved immediately.


5. Which key optimization-related factors influence KPIs?

Planning quality of engineering parameters, radio parameters,

frequencies and channels often have impacts on KPIs.

Planning quality of engineering parameters, radio parameters,

frequencies and channels often have impacts on KPIs.


6. How to realize monitoring of global KPIs?

q Monitor KPIs of key networks once every month.

q Network optimization and maintenance engineers on project sites report

KPIs of key networks to contact persons of GSM Network Planning &

Optimization Dept.

q Score the monthly averages of integrated KPIs, and sum them up to

obtain a mark of overall network KPIs, and hence a rank in evaluation of

network indicators.

q Monitor KPIs of key networks once every month.

q Network optimization and maintenance engineers on project sites report

KPIs of key networks to contact persons of GSM Network Planning &

Optimization Dept.

q Score the monthly averages of integrated KPIs, and sum them up to

obtain a mark of overall network KPIs, and hence a rank in evaluation of

network indicators.

Classification of KPI ranks

Rank Excellent Good Acceptable Poor Danger

Scoring standards >=90 <90 <80 <70 <60


7. Scoring methods of global network KPIs

KPI assessment total score=A+B+C

Assessment criteria of KPIs in key networks

KPI benchmark Indicator

benchmark Full mark

Fullmark criteria Award criteria Deduction criteria

Overseas networks

A. Call set-up success rate

12 92% 20 96.00%1 point is awarded for each

increment of 0.5%; full score=201 point is deducted for each reduction of 1%; lowest=0

B. Voice channel drop rate (incl.HO)

24 0.80% 40 0.35%0.9 is awarded for each reduction

of 0.025; full score=40

1 point is deducted for each increment of 0.05%;

lowest=0

C. Handover success rate

24 93% 40 96.00%1.34 is awarded for each

increment of 0.25%; full score=40

1.5 points are deducted for each reduction of 0.5%;

lowest=0

Domestic networks

A. TCH assignment success rate (excl.HO)

12 95% 20 99.50%0.8 is awarded for each increment

of 0.45%; full score=20

0.6 point is deducted for each reduction of 0.25%;

lowest=0

B. Voice channel drop rate (incl.HO)

24 1% 40 0.30%0.8 is awarded for each deduction

of 0.025%; full score=40

0.9 is deducted for each increment of 0.025%;

lowest=0

C. Handover success rate

24 94% 40 98.00%1 point is awarded for each

increment of 0.25%; full score=40

1 point is deducted for each reduction of 0.25%;

lowest=0


8. What is the alarm threshold of KPI deterioration?

p If evaluation score of key KPIs reaches danger class, alarm shall

be enabled timely.

p When a KPI deteriorates too much, alarm shall be enabled timely.

p When no. of subscribers’ complaints increases dramatically (and

the situation continues for a period), which leads to decrease in KPIs,

alarm shall be enabled timely.

p If evaluation score of key KPIs reaches danger class, alarm shall

be enabled timely.

p When a KPI deteriorates too much, alarm shall be enabled timely.

p When no. of subscribers’ complaints increases dramatically (and

the situation continues for a period), which leads to decrease in KPIs,

alarm shall be enabled timely.


III. Optimization of ordinary KPIs

1. What’s the content of routine KPI optimization?

2. What’s the structure of KPI optimization team?

3. What resources are needed in KPI optimization?

4. What are the common methods of improving KPIs?

5. What system functions have impacts on KPIs?


1. What’s the content of routine KPI optimization? (1)


1. What’s the content of routine KPI optimization? (2)


2. What’s the structure of KPI optimization team?


3. What resources are needed in KPI optimization?

Serial No. Work content

Work load (100sites) Work load (500sites) Work load (1500sites)

person/day person/day person/day

System optimization

engineers

Outsourced engineers & technicians

System optimization

engineers


System optimization

engineers


No. of sites 100 500 1500

I Collection of radio data 5.5 20 15.5 100 43.5 300

II Optimization &adjustment 50 10 250 50 750 150

1 Adjustment of engineering parameters 5 10 25 50 75 150

2Analysis &adjustment of network

parameters25 125 375

3 Adjust hardware failure 10 50 150

4 Checking interference (optional) 10 50 150

IIIPost-optimization network

evaluation14.5 10 24.5 50 61.5 150

1 Radio drive test(DT) 10 50 150

2 Analysis of network coverage 2.5 12.5 37.5

3 KPI verification 7 7 14

4 Writing optimization report 5 5 10

IV Inspection & acceptance summary 8 8 13

1 Renew project materials 5 5 10

2Compile &amend project inspection

& acceptance plans 3 3 3

Total 78 40 298 200 868 600

The workload of routine KPI optimization is measured by the demand of

system engineers and testing engineers.

The workload of routine KPI optimization is measured by the demand of

system engineers and testing engineers.

Internal Use Only▲4. What are the common methods of improving KPIs?-(Non-optimization-related

factors)

To eliminate the influence of non-optimization-related factors on

KPIs, we need to coordinate resources of different aspects.

To eliminate the influence of non-optimization-related factors on

KPIs, we need to coordinate resources of different aspects.

Internal Use Only▲4. What are the common methods of improving KPIs?-(Optimization-related

factors)

Common methods used in improving KPIs:Common methods used in improving KPIs:


5. What system functions have impacts on KPIs?

KPIs may be impacted by some system functions. Pay

attention to the possible impacts before commissioning.

KPIs may be impacted by some system functions. Pay

attention to the possible impacts before commissioning.

DTX / Power

control enabled

Internal interference

may be reduced

HR enabled

It can reduce

congestion and

improve connection

rate

AMR enabled

It can improve UL/DL

RQ, decrease call drop

rate.

DTX may bring in background noise in calls.

It may lead to decrease in MOS, SQI and call quality.

For MSs incapable to meet protocol stipulations, it may lead to assignment failure, call drops, or problem of being unable to originate a call.

Advantages Disadvantages

gsm network optimization express-kpi pocket book v1.pdf

Documents

integrated kpis

changes of kpis

zte kpis

different kpis

basic kpis

statistical kpis

complete kpis

important kpis