umts-radio-network-planning
TRANSCRIPT
HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
Huawei Confidential
Security Level: confidential2008-5-11
UMTS Radio Network Planning
Huawei Northwest Africa Region
RNP Solution Manage: William.chen
3G network planning introduce
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Agenda
New feature for WCDMAHandoverPower controlInterference
3G Radio Network Planning workflow
3G Coverage Planning
3G Capacity Planning
The Expect of Mobilis about RNP
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WCDMA feature-Soft handover
n Soft/Softer handover
nSoft/Softer handover can help us hear the voice from more far!!
nSoft/Softer handover can help us improve the handover successful!
nSoft handover: Multi connection with different NodeB
nSofter handover: Multi connection with different cell belong to one NodeB
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WCDMA feature-Power Control
n Power control
n Less Tx Power, Save Power
n Less Interference
lNear Point
lFar Point
nSmooth Rx Level, Improve QoS
I can hear very clearly, Down Txpower
I can not hear clearly, Up Txpower
Tx Power
Distance from NodeB
Frequency is very high: 1500Hz
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WCDMA feature-Interference
n Interference
nWhere does Interference come?
n Central of Cell
Most come from own Cell, less from neighbor cell
n edge of Cell
Most come from neighbor Cell, less from own cell
nWhat is Interference for WCDMA?
All the Cell in same carry use same frequency
Carry1 Carry2 Carry3
frequency
Same as GSM, interference comes from frequency
How far I can hear you depend on both your voice strength and other people noise
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WCDMA feature-Service
n Service
UMTS Radio Network Planning focus on the all kinds of bear service, how far and how many. Based on the experience of GSM, combined with knowledge of WCDMA feature, everyone can be an WCDMA RNP expert.
n AMR Voice
n Video Call
n PS R99
n PS HSPA
n MBMS
n….
All Service are carried by different Radio Bearers
Radio Bearers
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Agenda
New feature for WCDMA
3G Radio Network Planning workflow3G Coverage Planning
3G Capacity Planning
The Expect of Mobilis about RNP
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DimensionPlanning
Preparation
NominalPlanning
Network Deployment DetailedPlanning
n Coverage area (Dense urban, Urban, Suburban )n QoS criteria (Consecutive Service, BLER)n Capacity requirement (Subscriber, traffic model)n Link budget parameters (Penetration loss, Propagation model)
Discussed byMobilis andHuawei
n Link budgetn Capacity dimensionn Iub and CE dimensionn Network development solution
Huawei deliver
The output of dimension is important criteria toassess RNP solution
Mobilis and Huawei do the planning jointly
n Site selectionn Propagation model tuningn Site survey/candidate site searchn 2G information
n Neighbor cell configurationn LAC/RAC planningn Cell parameters configurationn Algorithm configuration
UMTS Network Planning Workflow
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0 3 6 9
12 15 18
21 24 27
30 33
36 39 42 45 48
010
2030
4050
60
70
80
90
100
Number of Sites
0 3 6 9
12 15 18
21 24 27
30 33
36 39 42 45 48
010
2030
4050
60
70
80
90
100
Number of Sites
Initial phase
Mature Phase
Development phase
n Capacity is emphasis;n Capacity expansion solution is importantn High spectrum efficiency
n Initial phase focus on the coverage;n Hotspot and Dense urban are first target;n Reuse 2G resource, save investment;n Provide 3G feature service;
n This phase focus on balanceof coverage and capacity;
n Hotspot and dense urban absorb capacity;
n Coverage extension to rural and highway;
n Provide abstract service, new feature such as HSPA, MBMS are important.
2G Resources
Different emphasis for planning phases
Experience and Deep communication!!
Optimization and new feature deployment!!
Long term development and expansion solution!!
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Agenda
New feature for WCDMA
3G Radio Network Planning workflow
3G Coverage Planning3G Capacity Planning
The Expect of Mobilis about RNP
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NodeB Number
Cell Radius
Aim of coverage dimensioningn to obtain the cell radiusn to estimate NodeB number for coverage
Coverage Dimension
Link budgetInput
parameters
Dimension Start
Max PathlossPropagation model
Coverage area
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AMR 12.2KVP 64KPS 128KPS 384K
Huawei Suggests
n PS128K or CS64K is the consecutive coverage service in the Urbanand Dense Urban
n PS 64K or AMR 12.2K is the consecutive coverage service in the Suburban or Rural Area
Step1:continue coverage service
Determine the continue coverage service n Initial coverage focus on 3G feature service such AMR and VP;
n UL 64k PS service combine with HSPA can meet high throughput requirement.
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Step2:Configure link budget parameters
It is suggested that Mobilis fix the environment parameters, andvendor provides the equipment parameters.
3.8dB for Dense UrbanSlow Fading Margin
UL:1.1dB for Dense UrbanFast Fading Margin
Reference valueEquipment parameters
3dB(AMR),0dB(other)Body Loss
UL:7dBNoise figure
NodeB:18dBi, UE:0dBiAntenna Gain
UL:21dBm/DL AMR:30dBmTx Power
95% for Dense UrbanCoverage Probability
VP for Dense UrbanConsecutive service
Reference valueEnvironment parameters
TU3 for Dense UrbanCoverage channel model
18dB for Dense UrbanPenetration Loss
UL:50%,DL 75% for R99Cell load
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Link Budget Parameters: equipment
n Some equipment parameters are recommended by 3GPP, it is usually fixed in
link budget.
0.5%Video call
5%PS64K/PS384
10%HSDPA
1%AMR
BLERContinued service
n BLER (Block Error Rate) n Body Loss n Max Service Tx Power
35~39dBmPS384(DL)
21dBmMobile phone (UL)
31~33dBmPS64K(DL)
34~36dBmVideo call(DL)
24dBmData card (UL)
30~32dBmAMR(DL)
Power offset Continued service3dB for AMR;
0dB for Video call and PS service
0.1% 1% 10%BLER
27dBm 30dBm 33dBmTx Power
BLER and service Tx Power is result by balancing the coverage and capacity.
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Link Budget Parameters: equipment
n Some parameters are depended on vendor equipment, it is not fixed in link budget.n Cable loss
-
5/4
7/8
Cable select
BBU+RRU
Macro-NodeB
NodeBType
4.56dB/100m@2100MHz>50m
0dB-
6.29dB/100m@2100MHz<50m
Cable lossAntenna high
n Noise Figure
ü NF of terminal is 5~7dB, it is refer to User Equipmentü NF of NodeB is different between venders. Huawei 3800 series NodeB had low NF of 1.6, other vendor is 2.3~3.5.
The low NF can increase UL coverage by 5%~20%.
There is no cable loss for BBU+UUR, UL coverage increase by ~30%
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Environment parameters: fading margin
Path Loss — fading due to propagation distance
n Long Term (Slow) fading—caused by shadowingn Short Term (Fast) fading—caused by multipath propagation
Slow Fading Margin depends on:
n Area Coverage Probability
--- The higher coverage probability is, the more SFM required
n Standard Deviation
--- The higher standard deviation is, the more SFM required
There should be margin to compensate the fading
6.2
6.2
7.2
9.4
11.7
Standard Deviation
8.195%Dense urban
695%Urban
490%Suburban
0.890%Rural
0.8
Slow fading margin
Highway
Clutter
90%
Coverage Probability
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Environment parameters: SHO Gain
n SHO Gain against slow fadingn SHO reduces slow fading compared to the single cell case
n SHO gain against slow fading can improve the coverage probability
n SHO Gain against fast fading
n Macro Diversity Combining Gainn MDC gain reduces the Eb/No requirement
n MDC leads to a gain for reception sensitivity
n MDC gain exists for both uplink and downlink
Soft handover gain – SHO gain consists of three parts:
The fast fading margin and slow fading margin in Huawei’s link budget has been considered the SHO gain.
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( ) [ ]dBLogNoiseRise ULη−⋅−= 110 10
Ø 50% UL Load — 3dBØ 60% UL Load — 4dBØ 75% UL Load — 6dB
UL Load
Noi
seR
ise(
dB)
Interference Curve
n How to calculated DL interference margin?
Environment parameters: interference margin
n UL interference margin is Noise Rise in NodeB
70% DL loadTx Power
Max Tx Power=
AMRPS384K
Pathloss_AMRPathloss_PS
Which pathloss is bigger?
Pathloss_AMR
Which received noise is bigger?Same Tx Power, but small pathloss, so PS384K noise rise is bigger than AMR
Same DL load, different DL interference margin
High throughput, high interference margin!
Same UL load, same interference margin
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Step3:Reception Sensitivity
tN
Signal after despreading
W
R
Pow
er d
ensi
ty (W
/Hz)
Frequency (Hz)
Signal after spreading
fN
:thermal noise (-108dBm/3.84MHz)
:Noise figure of NodeB(1.6dB for NodeB, 7dB for UE)
10 (dB)PS384k18 (dB) PS64k25 (dB)AMR12.2k
Processing Gain
NoEb / :Bit energy divided by noise spectral density
) )(/3 8 4 0l o g (1 0 k b p sRP G =
PGNENNsitivityceptionSen bft −++= 0/Re
Processing Gain-- Related to bearer data rate
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nUE Transmit Power
nUE Antenna Gain
nNodeB Antenna Gain
nSHO Gain
nSlow fading margin
nFast fading margin
nInterference margin
nBody Loss
nCable Loss
nPenetration Loss
nMaximum allowable pathloss
nNodeB reception sensitivity
Maximum Allowable Pathloss=UE Transmit Power
+ Antenna Gain+ SHO Gain-Slow Fading Margin-Fast Fading Margin-Interference Margin-Body Loss-Cable Loss-Penetration Loss
Step4: Maximum Allowable Pathloss
Notes:nNo TMA ApplicationnSFM&FFM not include SHO
Path Loss
Cable Loss
Antenna Gain
NodeBSensitivity
Penetration loss
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The output of link budget is MPL rather than cell radius!
MPL is input of Link budget
Propagation model
Max Pathloss Cell RadiusLink budget
It is usually to compare the MPL to access the coverage performance. And cell radius can be a reference when given a consolidated propagation model.
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Agenda
UMTS Network Introduce
New feature for WCDMA
3G Radio Network Planning workflow
3G Coverage Planning
3G Capacity PlanningThe Expect of Mobilis about RNP
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Capacity Dimensioning Flow
Dimensioning Start
Assumed Subscribers
Yes
No
CS Peak Cell Load(MDE)CS Average Cell Load PS Average Cell Load
=Target Cell Load?
Dimensioning End
Total Cell Load
Load per Connection
Total subscriberTraffic model
Coverage dimension result
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Multidimensional ErlangB
Multidimensional ErlangB - Resources shared
High Utilization of resources
Huawei use Multidimensional ErlangB(MDE) for CS Capacity dimension
ErlangB - Partitioning Resources
Low Utilization of resources
Traditional/other vender dimension method
Multidimensional ErlangB
Two big case, one small case, how many car can carry them all?
More Accuracy
Especial for 3G
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CE/Iub Dimensioning
CEresources...
...
AMR12.2k
CS64k
MultdimensionalErlangB Model
Multidimensional ErlangB is used in CE/Iub dimension
If we know how many cases one car can carry, how can get the CE/Iub?
Represent the subscriber
Represent the NodeB
8
4
2
2
1
CE (DL)
10PS384k
5PS128k
3PS64k
3CS64k
1AMR12.2k
Iub(Kbps)CE (UL)Bearers n Signaling and CCH not required CE
n CE are pooled per NodeB for all cells
n Low CE resource required for higher
data rate
n advance algorithm improve the utilize
efficiency of Iub transmission
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Dimensioning Input is Important
Site Number21 Coverage Performance
AMRVPPS384K
The balance of coverage dimension and capacity dimension
CE/IuB3
Coverage
dimension
Input requirement dimension start
Capacity
dimension
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Hong Kong PCCW Project
n Complex terrain: Hilly to mountainous with steep slopes; lowlands in north
n Built-up dense business district: 630 buildings/km2, 250K people per km2, average
building height 45mn Difficult to build DAS in most high buildings
n High population density: 25,0000 people/km2 in dense urban
RNP & RNO in world’s most challenging radio propagation environment
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RNP and RNO Timeline
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Examples of Coverage Solutions for PCCW
l Large down-tilt for coverage and interference control
l Make full use of the obstruction of surrounding buildings
l 4th floor antennas to cover the shops along the main street
l In dense city areas, coverage need to be multi-dimensional
l Up-tilt technique is widely used in Hong Kong
Low Height Antenna
l Multi-sector coverage planning based on splitting cell solution
Rooftop Antenna Cell Splitting
Medium Height Antenna
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Agenda
UMTS Network IntroduceNew feature for WCDMA3G Radio Network Planning workflow3G Coverage Planning3G Capacity PlanningThe Expect of Mobilis about RNP
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QuestionsQuestions and Answer
What are the new feature for WCDMA?Soft/softer handover, power control, interference ,service
What is out put for Link budget?Maximum allowed Pathloss
What parameters should be fixed by operator?Environment parameters is fixed by operator, equipments parameters is provided by vendors
What algorithm is used in capacity dimension?Multidimensional ErlangB, it can improve the resource utilization efficiency
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HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
Huawei Confidential
Security Level: confidential2008-5-11
Thank You
www.huawei.com
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