11 wcdma rnp&rno conspectus
TRANSCRIPT
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WCDMA RNP&RNO
Conspectus
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Main Topics WCDMA RNP Principles and
Procedures
WCDMA RNO Principles andProcedures
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WCDMA RNP Overview
WCDMA Radio Network Dimensioning
WCDMA Nominal Planning
WCDMA Final Design
WCDMA RNP Principles and Procedures
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RNP Definition
According to deployment and evolution requirements, aswell as cost-effectiveness consideration, generate the
amount of Network Elements (NE), NE configuration, and
Transmission design between different NE.
Network Planning Scope Core networkfocus on CN element dimension
and configuration.
Radio networkfocus on RAN
element dimension and configuration
Transmission network
focus on link dimension and
configuration between network elements.
RNSRNC
RNSRNC
Core Network
Node B Node B Node B Node B
Iu Iu
IurIub IubIub Iub
Definition & Scope
WCDMA k l i
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WCDMA network planning
solution WCDMA Radio network planning
(NodeB/RNC)
WCDMA Transmission network planning
(Iu/Iur/Iub) WCDMA Core network planning (CS/PS
domain)
WCDMA RNP tools development
U-NetHuawei
Network KPI
Pilot pollution
Soft-handover ratio and probability
Access probability of
different services
Best Server Distribution
CE dimension
Estimation result
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Objectives of network planning
The RF Design of wireless system revolves four
main principles. These principles are Coverage,
Capacity, Quality and Cost. And further, adapt to
the future network development and expansion.
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WCDMA RNP procedure
overview
Capacity
Quality Coverage
Interference
Final design
preparation
Dimensioning Nominal Planning
Site survey
Deployment
Detailed planning
Preliminary design
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WCDMA RNP Overview
WCDMA Radio Network Dimensioning
WCDMA Preliminary Design
WCDMA Cell Planning
CONTENTS
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Input & Output
Coveragerelated
Coverage area
Coverage
probability
Capacity related Traffic model
Service model
User density
Quality related QoS
requirements
GoS
requirements
Demodulationthreshold
System
dimensioning Number of sites
Systemconfiguration Sector structure
Number of
carriers
Cost on networkconstruction
Site cost
Equipment cost
Input Output
Coverage design
Capacity design
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WCDMA RNP Overview
WCDMA Radio Network Dimensioning
WCDMA Nominal Planning
WCDMA Final Design
CONTENTS
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Nominal Planning
Based on the result of network dimension,
preliminary design present Information oftheoretical sites including following :
Site coordinates.
Engineering parameters such as Antenna height,azimuths and tilts.
Radio parameters such as scrambling code ,transmit
power of different channels, etc.
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chart
Radio
Network
Dimensioning
Dimensioning
Report
Contract
Initial sites
choosing
System
simulation
Target
Size
Phase No.
Available sites
information
Site adjustment?
Y
N
Bidding
Document
Sites importingPropagation
model
Nominal planning report
(Including: search ring and
Theoretical site specification)
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About simulation Unlike GSM network, in CDMA coverage and capacity are too
inter-related to be predicted accurately, so we introduced Monte
Carlo simulation to evaluate the performance of a radio network.
EcEc/Iopilot pollution distribution
Soft (softer) handover area analysis UE transmit power
Eb/No, access successful rate of each service
WCDMA simulation
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Simulation output
Simulation output Pilot coverage (Ec, Ec/Io) in the
target areas
Best server plot
Coverage probability distribution
of each service Access failure distribution and
statistic of each service
Continuous coverage areas ofeach service
Cell load distribution of downlinkand uplink
Pilot pollution distribution
Soft handover areas statistic ofeach service
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Preliminary design output
Project background introduction
Target areas information such as population, district division etc.
Radio network solution: sites distribution plot, sites list etc.
Performance summary based on the simulation result.
Annex: simulation output
In preliminary design stage, we choose initial sites, do network performance
simulation, conduct adjustment according to the simulation result, until
finally we get all performance requirements fulfilled, then we can output the
with
following contents:
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WCDMA RNP Overview
WCDMA Radio Network Dimensioning
WCDMA Nominal Planning
WCDMA Final Design
CONTENTS
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-chart
Site list
Radio network
preliminary plan
report
New site or not2G site or not
Output SearchRings
Identifytheoreticalsite
Confirm site
conditions
or not
Site survey report
Meet site
requirements
or not
Yes
Site survey
No
Yes
Yes
No
Yes
No
No
Noise test Noise test report
Based on the preliminary design report,
we conduct more detailed cell planning.
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For each theoretical site, a physical site will be acquired
in this phase through following steps:
Define search areas
Site ranking
Identify candidate sites
Site acquisition
Site Survey
A suitable physical site
Give adequate radio coverage.
Have connectivity into the transmission network.
Be aesthetically and politically acceptable to the local community.
Have power nearby, good access and a co-operative owner.
A3rd
D1st
C2ndB - Unsuitable
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Site Survey report The surveyor will prepare a report listing
the options, and following items willincluded in the report:
Accurate grid reference.
Accurate height of structures or available antennawindows.
Photographs of the site.
360 panoramic photos from site or if obstructed
from nearby location/structure.
From site survey report, RNP engineers can derive
appropriate site location, antenna type,height, azimuth, down tilt, etc.
er ca on y sys em
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er ca on y sys emsimulation
It is an iterative
process to verifythe final design
until all the
requirements are
fulfilled Coverage prediction
RNP
Planningresults
Are
Requirement
s Fulfilled?
Traffic distribution System simulation
WCDMA RNP t t
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WCDMA RNP output
LAC, RAC, SAC Plan
Neighbor relation plan (intra-frequency, inter-
frequency, and inter-system)
Frequency plan
Scrambling code plan
Power allocation for each channel
Handover parameters
Access control parameters
Other radio parameters
After performance verification by simulation, we produce with more detailed contents. In order to guide the project
implementation, the report should also include following items
C
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WCDMA RNP summary
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Main Topics WCDMA RNP Principles and
Procedures
WCDMA RNO Principles andProcedures
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WCDMA RNO Principles and
Procedures Brief Introduction
Single Site Verification
Radio Frequency Optimization Parameters Optimization
Regular Testing & KPI Analysis
e wor p m za on
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To enhance networkperformance
--- e.g.
coverage/accessibility/mobility
To resolve specific issues
--- e.g. interference/coverage To improve subscribers
QoE
--- e.g. service quality/drop
e wor p m za onTarget
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Construction phaseTroubleshooting
Booming phasePotential Seeking
Mature phaseBalancing
Time
Subs.Number
RF plan review
Single site verification
Pre-launch optimization
KPI analysis ComplaintsDT & CQT
Customized and
differentiated
services
Billing strategies
Drop call
Congestion
Poor quality
Access failure
RF adjustment
Para. adjustment
Maintenance and upgrade
Network expansion
.
Investment
Return
Commerciallaunch
Optimization throughout Life Cycle
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Network Optimization Phases
RF optimization
Y
N
N
Y
Single site verification
80 sites in the
cluster ready?
Service test and
parameter optimization
Routine drive test andstats. analysis
Acceptance criteriasatisfied?
New site integrated
Optimization
preparation
Acceptance
w z
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w zPhasesSingle site verification
To verify the functionality of new
sites
--- e.g. site installation, basic
functions of the cell
RF optimization To control interference & pilot
pollution
To optimize coverage & 3G
neighbor lists
Services test & para.optimization To assess network performance
To optimize network parametersRegular route testing &
stats. analysis To monitor & evaluate network
performance
To identify & solve new networkissues
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Brief Introduction
Single Site Verification
Radio Frequency Optimization Parameters Optimization
Regular Testing & KPI Analysis
WCDMA RNO Principles and
Procedures
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Site Verification TargetTo verify cell coverage
CPICH RSCP
To investigate
interference
NodeB RTWP & CPICH Ec/Io
To verify site
installation
e.g. PA/antenna/feeders issues
Example: Site Verification
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An example Check list
Example: Site Verification
Checklist
Single Site Verification Checklist
Site expanded from:
Site migrated from RNC:
New site Expansion
Site Connected to RNC:
Idle mode
Note: If the item is OK, mark the "" before it by "" otherwise, mark the"" by "". If the item is not check, mark the "" before it by "/".
HSDPA 10 Normal function to access HSDPA
Migration Others
New Site:
Site Expansion:
Reminder
Mapinfo Update
Data Base Update
To:
To RNC:
Site Name:
Remarks
CPICH_RSCP > 75 dBm near site
Coverage DT 9 Check by DT whether the overall quality of service and cov
Connected mode
6
Mobile originated and terminated calls of VP service
8 Connection of PS services
Mobile originated and terminated calls of voice services
7
CPICH_EcIo > 8 dB near site
Site ID:
No. Activity/Process
Site Migration
Others
3 LAC/RAC data configuration
1
4
2 Scramble configuration
Frequency configuration
5
Remarks (further explanation):
2-Name/Designation: Signature: Date:
Reviewed by:
1-Name/Designation: Signature: Date:
X
r nc p es an
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Brief Introduction
Single Site Verification
Radio Frequency Optimization Parameters Optimization
Regular Testing & KPI Analysis
r nc p es anProcedures
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RF Optimization Target
To optimize coverage
To minimize pilot
pollution
To optimize celldominance
To o timize nei hbor cell
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RF Optimization ProcedureDrive test
Identify RF issues
Identify candidate
cells for changes
Identify nature of
required changes
Determine amount
of changes
Implement changes
Repeat drive test
Finished
N
Problem resolved?
Y
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RF Parameters Optimization
Engineering parameters
adjustment To adjust antenna down tilt To adjust antenna azimuth
To adjust antenna location
To adjust antenna height
To replace antenna
To replace site
To add new cell
Radio part parameters
adjustment To optimize neighbor cell list
RF related Drop Calls
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RF-related Drop Calls
Poor coverage
High interference
Poor UL coverage
Poor dominance
Pilot pollution
Missing neighbors
Problems
Fast change of RF conditions usuallycauses drop calls, e.g. turning a corner.
Poor RSCP & Ec/Io
Poor Ec/Io or RTWP
UE max Tx power
many SHO events
many cells present
Appearance
WCDMA RNO P i i l d
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Brief Introduction
Single Site Verification
Radio Frequency Optimization
Parameters Optimization
Regular Testing & KPI Analysis
WCDMA RNO Principles and
Procedures
Para Optimization
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Para. OptimizationTarget
To reduce access
failures
To reduce drop calls
To enhance service
quality
Para. optimization
is an important step
after RF optimization
Service quality and network resourcesutilization
will be improved after para. optimization
Parameters to be
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Parameters to beOptimized
CCCH power allocationpara.
RL maximum power
para.
Cell re-selection para.
Intra-freq. handover
para.
Inter-RAT handover para.
Power control para.
Access power para.
Other related para.
The influence caused by the cell
parameters adjustment shouldbe analyzed carefully.
Seldom adjusted
An effective way to
reduce drop calls
WCDMA RNO Principles and
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Brief Introduction
Single Site Verification
Radio Frequency Optimization Parameters Optimization
Regular Testing & KPI Analysis
WCDMA RNO Principles and
Procedures
Regular Drive Testing Target
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Regular Drive Testing Target
To get benchmark of the
performance of the networkand users experience
To monitor the progress of
on-going optimisationactivities
To validate new features of
the RAN To identify degradation in
coverage and/or increase in
interference
call setup SR,
call drop rate,PS throughputs
As a result of increasedtraffic or changes inenvironment
Routine drive tests should becarried out (e.g. on monthly)
Routine Stats Analysis
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Routine Stats. Analysis
Target
To benchmark networkperformance
To monitor traffic volumes &
patterns To assess impact of
parameter changes
To identify poorlyperforming cells
To provide triggers for
network upgrade decisions
ro ess ona p m za on
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MSC/SSP/VLR
HLR/AC
GMSC/SSP
PSTNPLMNISDN
iManagerTM M2000
GENEXNastar
GENEXAssistant
GENEXProbe
CN
Node B
Node B
Node B
RNC
RNC
Node B
Node B
Node BRNS
RNS
GENEX Probe
AGILENT
QUALCOMM
HUAWEI RNC
ro ess ona p m za onTools
Performance/alarms
/configurations/
engineering para.Capture test data
AnalysisResult
sharing
RAN autoconfigurationconsole
Summary
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Summary
UMTS NetworkOptimization
To provide a more competitive
network for OperatorTo provide better quality of
experience for Subscribers
Trade-off between optimized
coverage, capacity, quality
Ongoing optimization acrossnetwork life cycle
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