Sovath_k@yahoo.comMobile: 2490200

II

OptimizationOptimizationIIII

OptimizationOptimization

IIIIII

IVIV

VV

ParameterParameter

II OptimizationOptimization

- - .

Coverage Cells .

. Interference Band. Traffic jam, Congestions, Call drop, HO Failure. ...

.

Optimization

No Coverage. Interference band. Blocking . Handover Failures. HW/SW Failures. . Transmission network failure.

IIII OptimizationOptimization

) OMCR. RNO. Network Structure Map. BTS, BSC location. TRX, Cell, Sector, Omni Antennas direction. . Operator.

Optimization Notebook. SW Driving test GPS. Mobile Testing. Serial Connect. SIM Test. Inverter DC/AC . Compass.

Optimization

Site Master. Spectrum Analysis. . Spare Parts. .

1: BSC and CELL parameters check and adjustment, OMCR

performance report analyzing, bad cell solving. CELL frequency check and adjustment, CELL handover relationship check, CELL direction trace and site data update.

2: Drive test and cell direction checking. Hardware problem solving and cell feeder cross checking. A interface signaling trace, Abis interface signaling trace,

bad CELL check and trace, CELL feeder cross check, signal interference check.

Optimization

IIIIII ParameterParameter

1. IDLE MODE

Cell Parameter

Cell Parameter

2. DEDICATE MODE

Cell Parameter

Cell Parameter

IDLE mode

Cell Parameter

IDLE mode

Cell Parameter

DEDICATE mode

Cell Parameter

Cell Parameter

DEDICATE mode

IVIV

Coverage Analysis of coverage requirement

Drop Call Analysis for drop call due to Interference SW/HW failures Transmission network failure

Call setup success Analysis for blocking and capacity limitation

Handover Performance Analysis for efficient handover performance

Speech Quality Analysis is interference

Call setup success No systems availability

No coverage

Network element failures

Transmission network failures

Low Call Setup Success rate RF Network

No coverage

Interference

Fixed network BSS

Blocking

Overload

High Call Drop Rate RF Network

No coverage

Interference

Handover failure

Fixed Network BSS, NSS

Network element failures

Transmission network failures

Other Network

Mobile Terminal

Downlink Output power low

Obstruction of Tx Antennas

Antennas not aligned properly

Broken/Wrongly connection cable

Database parameter control output power

Uplink Receive sensitivity degrade

due to hardware problems

Obstruction of Rx Antennas

Antennas not aligned properly

Broken/Wrongly connection cable

Lack of diversity gain

) OMC Measurement

Handle traffic Drop call Interference Handover Uplink and downlink analysis possible

1. Collect/Analysis OMC Statistic

16.36%

0.88%

11.96%7.83%

1.58%5.82% 7.29%

11.93%

73.37%

62.97%

0.00%

10.00%

20.00%

30.00%

40.00%

50.00%

60.00%

70.00%

80.00%

UL rxLev DL rxLev UL rxQual DL rxQual Power Budget

Before After

Optimization

) Test Measurement

Serving signal level Bit error rate Channel number CI and LAI Timing advance Signal and power level BSIC Collect MS measurement report data

2. Collect/Analysis Drive Test Measurement

Optimization

3. Drive Test

Repeat call setup Continuous call Scanning mode Check for spectrum occupancy Check for BCCH

Optimization

Coverage

Test Mobile Measurement

Antennas Configuration Check

Verification of RF network design

Link Budget Analysis

) Test Mobile Measurement Consequences of poor

RxLev Low RxQual

Vulnerable to interference

Limitation with drive test Downlink only

Other Method Statistic analysis

OMC or drive test

Coverage

) Antennas Configuration

General point to check Antennas Type

Omni

Directional 60,90 or 120 degree

Electrical down tilt

Cross polarised

Antennas Azimuth angle Coverage targets

General point to check Antennas tilt angle

Electrical

Mechanical

Diversity & Isolation Space Diversity

Polarisation Diversity

Coverage

) Verification of RF Network design

Site Check (Check installation)

Special feature for coverage

Site physical configuration evaluation

Site to Site distance and distribution

Site database configuration evaluation TX power

Power control setting

Coverage

PAPA

Feeder lossTransmission

loss

Antenna gain

Penetration loss

Site sensitivity

Fading margin

Body lossMS power

Put it in a simple way, link budget is the computing of loss and gains on one telecommunication link.

Coverage

) Link Budget Analysis

Losses

Margin reservation

Gains

Network Type & Equipment

Link Budget

Transmission power and reception sensitivity of MS/BTS

Maximum site configuration affect the selection of combining and distribution unit

Fast fading margin Slow fading margin Interference margin

Site antenna gain MS antenna gain TMA gain

Path loss Body loss Apartment

loss Vegetation

loss

Building penetration loss

Feeder and connector loss

Combiner and splitter loss

) Link Budget Analysis

Coverage

IVIV

- TX Power Base- Cable Feeder Loss - Feeder Cross- Antenna

Coverage - Direction Antenna - MCPA Reapearter

- Base Coverage Traffic

- - Hard ware Base- Hand Over - Hand Over - Parameter Cell Reselection- Cable Feeder Loss- Antenna- Hard ware Base

- Hard ware Base & BSC- Configuration BSC & MSC- Trunk BSC & MSC- Transmission - Hard ware Base & BSC- Interference band - Transmission Bit Error