Post on 01-Nov-2015
description
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