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Muti-Carrier RF Strategy for V
Project
Huawei Technologies Co., Ltd.
All rights reserved
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Muti-Carrier RF Strategy for V Project Keyword: WCDMA, Multi-carrier
Abstract: The document is to provide RNO engineers to deploy the multi-carrier
stratagy for V project and network audit reference.
Abbreviations:
Abbreviations Full spelling
KPI Key Performance Indicator
RNO Radio Network Optimization
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Contents
I. Multi-Layer RF Strategy................................................................................ 6
- Existing Strategy (Load Balance) ................................................................................. 6
1 Backgroud introduction ................................................................................. 6
1.1 Pre-define ...................................................................................................... 6
1.2 System Limitation........................................................................................... 6
1.3 Benefit .......................................................................................................... 6
1.4 Disadvantage.................................................................................................. 6
2 Carrier Plan for V Project.............................................................................. 7
2.1 Carrier Plan for New Strategy........................................................................... 7
2.2 Carrier Plan for Existing NSN Strategy.............................................................. 8
2.3 Carrier Plan for Existing Ericsson Strategy......................................................... 8
3 Legend definition .......................................................................................... 9
4 Load Balance Strategy without 3Gis Roaming ............................................ 10
4.1 Scenario 1: Metro and Outer Metro Scenario .................................................... 10
4.1.1 - IDLE and Cell PCH/FACH Mode............................................................... 10
4.1.2 - DRD/LDR Mode ........................................................................................ 10
4.1.3 - HO Mode ...................................................................................................11
4.2 Scenario 2: Rural-Co located U850 ..................................................................11
4.2.1 - IDLE and Cell PCH/FACH Mode................................................................11
4.2.2 - DRD/LDR Mode ........................................................................................ 12
4.2.3 - HO Mode .................................................................................................. 12
4.3 Scenario 3: Femto Idle/connected Mode .......................................................... 13
4.4 Parameter Setting.......................................................................................... 13
4.4.1 IDLE Mode Parameter Setting(without 3Gis) ................................................... 13
4.4.2 IDLE Mode Parameter Setting(with 3Gis)........................................................ 14
4.4.3 DRD Parameters ........................................................................................... 14
4.4.4 LDR Parameters ........................................................................................... 15
4.4.5 HO Parameters ............................................................................................. 16
5 Load Balance Strategy with 3Gis Roaming ................................................. 17
5.1 Scenario 1: Metro-Co located U850 IDLE Mode with 3Gis Roaming .................. 17
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5.2 Scenario 2: Rural-Co located U850 IDLE Mode with 3Gis Roaming ................... 17
5.3 Scenario 3: Femto IDLE/connected Mode with 3Gis Roaming............................ 18
II. Multi-Layer RF Strategy.............................................................................. 19
- Optional Strategy (Service Steering) .......................................................................... 19
6 Backgroud introduction ............................................................................... 19
6.1 Pre-define .................................................................................................... 19
6.2 System Limitation......................................................................................... 19
6.3 Benefit ........................................................................................................ 19
6.4 Disadvantage................................................................................................ 19
7 Service Steering Strategy without 3Gis Roaming........................................ 20
7.1 Scenario 1: Metro Scenario (U21A/U21B /U08A/U08B) ................................... 20
7.1.1 - IDLE and Cell PCH/FACH Mode............................................................... 20
7.1.2 - DRD/LDR Mode ........................................................................................ 21
7.1.3 - HO Mode U2100 with continuous coverage ................................................... 21
7.1.4 - HO Mode U2100 with incontinuous coverage ................................................ 22
7.2 Scenario 2: Outer Metro Scenario (U21A/U08A) .............................................. 22
7.2.1 - IDLE and Cell PCH/FACH Mode............................................................... 22
7.2.2 - DRD/LDR Mode ........................................................................................ 23
7.2.3 - HO Mode U2100 with continuous coverage ................................................... 23
7.2.4 - HO Mode U2100 with incontinuous coverage ................................................ 24
7.3 Scenario 3: Rural-Co located U850 ................................................................. 24
7.3.1 - IDLE and Cell PCH/FACH Mode............................................................... 24
7.3.2 - DRD/LDR Mode ........................................................................................ 25
7.3.3 - HO Mode (1).............................................................................................. 25
7.3.4 - HO Mode (2).............................................................................................. 26
7.4 Scenario 4: Femto Idle/Connected Mode.......................................................... 26
7.5 Parameter Setting.......................................................................................... 27
7.5.1 IDLE Mode Parameter Setting........................................................................ 27
7.5.2 LDR Parameters ........................................................................................... 27
7.5.3 HO Parameters ............................................................................................. 29
8 Service Steering Strategy with 3Gis Roaming............................................. 30
8.1 Scenario 1: Metro-Co located U850 IDLE Mode with 3Gis Roaming .................. 30
8.2 Scenario 2: Rural-Co located U850 IDLE Mode with 3Gis Roaming ................... 30
8.3 Scenario 3: Femto IDLE Mode with 3Gis Roaming ........................................... 31
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9 Cell SPG Definition..................................................................................... 31
10 Summary.................................................................................................... 32
10.1 Load Balance vs Service Steering ................................................................... 32
10.1.1 PS CSSR ............................................................................................ 32
10.1.2 CS CSSR ............................................................................................ 32
10.1.3 CS and HSDPA traffic .......................................................................... 33
10.1.4 CS InterRAT Success Ratio and Attempt ................................................. 34
11 Conclusion ................................................................................................. 34
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I. Multi-Layer RF Strategy
- Existing Strategy (Load Balance)
1 Backgroud introduction
As 2011 TOP 1 project in Huawei company, V project with complicated network
structure and Multi-band hybrid network. During swap, Huawei will have border with NSN
and Ericsson. It caused many iusses during swap, this guideline will instruct local
engineer how to deploy Multi-carrier stratagy and how to audit network strategy.
1.1 Pre-define
F1/F2/E1/E2/U9 definition please refer to Chapter 2
3Gis network for roaming only
F1 &F2& E1 for idle mode camp carrier
All the carriers support HSPA
E2 for HSPA Preferred carrier
Femto is using F1 carrier
1.2 System Limitation
UE can only measure 2 inter-frequency only for both idle mode and dedicate mode
in 3G
UE can only measure 3 inter-frequency 3G frequency in GSM
SIB11 can not be too big, which may affect UE cell selection and re-selection
1.3 Benefit
Voice Service can go to F1/F2/E1.Good for PS CSSR.
1.4 Disadvantage
SIB11 size limitation issue
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2 Carrier Plan for V Project
2.1 Carrier Plan for New Strategy
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2.2 Carrier Plan for Existing NSN Strategy
2.3 Carrier Plan for Existing Ericsson Strategy
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3 Legend definition
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4 Load Balance Strategy without 3Gis Roaming
4.1 Scenario 1: Metro and Outer Metro Scenario
4.1.1 - IDLE and Cell PCH/FACH Mode
4.1.2 - DRD/LDR Mode
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4.1.3 - HO Mode
4.2 Scenario 2: Rural-Co located U850
4.2.1 - IDLE and Cell PCH/FACH Mode
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4.2.2 - DRD/LDR Mode
4.2.3 - HO Mode
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4.3 Scenario 3: Femto Idle/connected Mode
4.4 Parameter Setting
4.4.1 IDLE Mode Parameter Setting(without 3Gis)
Parameter U2100 F1 U2100 F2 U850 E1 U850 E2 U900 F3
Cell Reselection
Qqualmin -18 dB -18 dB -18 dB -12dB -18dB
Qrxlevmin -58(-115dB
m)
-58(-115dB
m)
-58(-115dB
m)
-53(-105dB
m)
-58(-115dB
m)
Qhyst2 1 (2dB) 1 (2dB) 1 (2dB) 1 (2dB) 1 (2dB)
IdleSintrasear
ch 5(10dB) 5(10dB) 5(10dB) 5(10dB) 5(10dB)
IdleSintersear
ch 4( 8dB) 4( 8dB) 4( 8dB) 10( 20dB) 4( 8dB)
SIB4 and
SIB12
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SsearchRat Mapping Value
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4.4.2 IDLE Mode Parameter Setting(with 3Gis)
Parameter U2100 F1 U2100 F2 U850 E1 U850 E2 U900 F3
Cell Reselection
Qqualmin -18 dB -18 dB -18 dB -12dB -18dB
Qrxlevmin -58(-115dB
m)
-58(-115dB
m)
-58(-115dB
m)
-53(-105dB
m)
-58(-115dB
m)
Qhyst2 1 (2dB) 1 (2dB) 1 (2dB) 1 (2dB) 1 (2dB)
IdleSintrasear
ch 5(10dB) 5(10dB) 5(10dB) 5(10dB) 5(10dB)
IdleSintersear
ch 4( 8dB) 4( 8dB) 4( 8dB) 10( 20dB) 4( 8dB)
SIB4 and
SIB12
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SsearchRat Mapping Value
INTERFREQNCELL
SIB11Ind F1->E1
Ture F2F1 True
F1->E1
Ture
E2-E1
Ture
U900> E1
U900>F1
True
IdleQoffset2sn 0 F2F1 -20 0 E2E1 -20 0
4.4.3 DRD Parameters
Parameter U2100 F1 U2100
F2
U850 E1 U850 E2 U900 F3
Inter-frequency Neighbors
BlindHoFlag TRUE(F1F2/E2
Cosector)
True ->
Co-sector
F1/E2
TRUE(E1E2C
osector)
FALSE to
other cells
FALSE
to other
cells
DRDEcN0Threshhold
-18dB ->
Co-sector F2
18dB ->
Co-sector
F1
-18dB ->
Co-sector E2 - -
DRD
Service Steering OFF OFF OFF OFF OFF
LdbDRDSwitchDCH OFF OFF OFF OFF OFF
LdbDRDSwitchHSDPA ON ON ON ON ON
LdbDRDchoice User
Number
User
Number
User
Number
User
Number
User
Number
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4.4.4 LDR Parameters
Parameter U2100 F1 U2100 F2 U850 E1 U850 E2 U900 F3
Trigger Condition
NBMLDCAL
GOSWITCH
UL_UU_LDR
-1&
UL_UU_LDR
-1&
UL_UU_LDR
-1&
UL_UU_LDR
-1&
UL_UU_LDR
-1&
DL_UU_LDR
-1&
DL_UU_LDR
-1&
DL_UU_LDR
-1&
DL_UU_LDR
-1&
DL_UU_LDR
-1&
CELL_CODE
_LDR-1&
CELL_CODE
_LDR-1&
CELL_CODE
_LDR-1&
CELL_CODE
_LDR-1&
CELL_CODE
_LDR-1&
CELL_CRED
IT_LDR-1
CELL_CRED
IT_LDR-1
CELL_CRED
IT_LDR-1
CELL_CRED
IT_LDR-1
CELL_CRED
IT_LDR-1
NODEBLDCA
LGOSWITCH
IUB_LDR-0& IUB_LDR-0& IUB_LDR-0& IUB_LDR-0& IUB_LDR-0&
NODEB_CRE
DIT_LDR-1&
NODEB_CRE
DIT_LDR-1&
NODEB_CRE
DIT_LDR-1&
NODEB_CRE
DIT_LDR-1&
NODEB_CRE
DIT_LDR-1&
LCG_CREDI
T_LDR-1
LCG_CREDI
T_LDR-1
LCG_CREDI
T_LDR-1
LCG_CREDI
T_LDR-1
LCG_CREDI
T_LDR-1
ULLDRTRIG
THD
55 55 55 55 55
ULLDRRELT
HD
45 45 45 45 45
DLLDRTRIG
THD
75 75 75 75 75
DLLDRRELT
HD
65 65 65 65 65
DrdOrLdrFlag FALSE FALSE E1F1/E2
TRUE
FALSE E1->U900F
1
E1<U900F1
TRUE
LDR Action
DLLDRFIRST
ACTION
CodeAdj CodeAdj CodeAdj CodeAdj CodeAdj
DLLDRSECO
NDACTION
InterFreqLDH
O
InterFreqLDH
O
InterFreqLDH
O
InterFreqLDH
O
InterFreqLDH
O
DLLDRTHIR
DACTION
BERateRed BERateRed BERateRed BERateRed BERateRed
ULLDRFIRST
ACTION
InterFreqLDH
O
InterFreqLDH
O
InterFreqLDH
O
InterFreqLDH
O
InterFreqLDH
O
ULLDRSECO
NDACTION
BERateRed BERateRed BERateRed BERateRed BERateRed
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4.4.5 HO Parameters
Parameter U2100 F1 U2100 F2 U850 E1 U850 E2 U900 F3
Inter-frequency Neighbors
BlindHoFlag TRUE(F1F2/E2
Cosector)
TRUE
(F2F1/E2
Cosector)
TRUE(E1E2
Cosector)
FALSE to
other cells
FALSE to
other cells
SHO
1A/1B/1C/1D
THD Mapping Values
1A/1B/1C/1D
Trigger Timer Mapping values
Inter-frequency and Inter-RAT HO
2D/2F THD
CS Typical Value Ec/Io 15/-12dB RSCP -110/-107dBm
PS IRAT HO Disable
Muti-RAB follow CS IRAT Setting
2D/2F Trigger
Timer
TRIGTIME2D=D640, TRIGTIME2F=D1280( Mapping NSN setting)
TRIGTIME2D=D320, TRIGTIME2F=D1280(Mapping Ericsson setting)
Target GSM /
Target
frequecy THD
Mapping by cell leve, Typical Value:-90dBm(NSN) /-95dBm(Ericsson)
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5 Load Balance Strategy with 3Gis Roaming
5.1 Scenario 1: Metro-Co located U850 IDLE Mode with 3Gis Roaming
5.2 Scenario 2: Rural-Co located U850 IDLE Mode with 3Gis Roaming
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5.3 Scenario 3: Femto IDLE/connected Mode with 3Gis Roaming
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II. Multi-Layer RF Strategy
- Optional Strategy (Service Steering)
6 Backgroud introduction
6.1 Pre-define
3Gis network for roaming only
F1 & E1 for idle mode camp carrier
F1 & E1 support HSPA but have low priority than F2 & E2(By SPG solution)
F2 & E2 for HSPA Preferred carrier
Femto is using F1 carrier
6.2 System Limitation
UE can only measure 2 inter-frequency only for both idle mode and dedicate mode
in 3G
UE can only measure 3 inter-frequency 3G frequency in GSM
SIB11 can not be too big, which may affect UE cell selection and re-selection
6.3 Benefit
Voice Service will go to F1 mainly. Less impact due to poor Ec/Io
Less SIB11 size limitation issue
6.4 Disadvantage
Worse PS CSSR.
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7 Service Steering Strategy without 3Gis
Roaming
7.1 Scenario 1: Metro Scenario (U21A/U21B /U08A/U08B)
7.1.1 - IDLE and Cell PCH/FACH Mode
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7.1.2 - DRD/LDR Mode
7.1.3 - HO Mode U2100 with continuous coverage
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7.1.4 - HO Mode U2100 with incontinuous coverage
7.2 Scenario 2: Outer Metro Scenario (U21A/U08A)
7.2.1 - IDLE and Cell PCH/FACH Mode
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7.2.2 - DRD/LDR Mode
7.2.3 - HO Mode U2100 with continuous coverage
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7.2.4 - HO Mode U2100 with incontinuous coverage
7.3 Scenario 3: Rural-Co located U850
7.3.1 - IDLE and Cell PCH/FACH Mode
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7.3.2 - DRD/LDR Mode
7.3.3 - HO Mode (1)
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7.3.4 - HO Mode (2)
7.4 Scenario 4: Femto Idle/Connected Mode
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7.5 Parameter Setting
7.5.1 IDLE Mode Parameter Setting
Parameter U2100 F1 U2100 F2 U850 E1 U850 E2 U900 F3
Cell Reselection
Qqualmin -18 dB -18 dB -18 dB -12dB -18dB
Qrxlevmin -58(-115dBm) -58(-115dBm) -58(-115dBm) -53(-105dBm) -58(-115dBm)
Qhyst2 1 (2dB) 1 (2dB) 1 (2dB) 1 (2dB) 1 (2dB)
IdleSintrasearch 5(10dB) 5(10dB) 5(10dB) 5(10dB) 5(10dB)
IdleSintersearch 4( 8dB) 10( 20dB) 4( 8dB) 10( 20dB) 4( 8dB)
SIB4 and
SIB12
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SIB4=OFF,
SIB12=OFF
SsearchRat Mapping Value
7.5.2 LDR Parameters
Parameter U2100 F1 U2100 F2 U850 E1 U850 E2 U900 F3
Trigger Condition
NBMLDCAL
GOSWITCH
UL_UU_LD
R-1&
UL_UU_LD
R-1&
UL_UU_LD
R-1&
UL_UU_LD
R-1&
UL_UU_LD
R-1&
DL_UU_LD
R-1&
DL_UU_LD
R-1&
DL_UU_LD
R-1&
DL_UU_LD
R-1&
DL_UU_LD
R-1&
CELL_COD
E_LDR-1&
CELL_COD
E_LDR-1&
CELL_COD
E_LDR-1&
CELL_COD
E_LDR-1&
CELL_COD
E_LDR-1&
CELL_CRE
DIT_LDR-1
CELL_CRE
DIT_LDR-1
CELL_CRE
DIT_LDR-1
CELL_CRE
DIT_LDR-1
CELL_CRE
DIT_LDR-1
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NODEBLDC
ALGOSWIT
CH
IUB_LDR-0
&
IUB_LDR-0
&
IUB_LDR-0
&
IUB_LDR-0
&
IUB_LDR-0
&
NODEB_CR
EDIT_LDR-
1&
NODEB_CR
EDIT_LDR-
1&
NODEB_CR
EDIT_LDR-
1&
NODEB_CR
EDIT_LDR-
1&
NODEB_CR
EDIT_LDR-
1&
LCG_CREDI
T_LDR-1
LCG_CREDI
T_LDR-1
LCG_CREDI
T_LDR-1
LCG_CREDI
T_LDR-1
LCG_CREDI
T_LDR-1
ULLDRTRI
GTHD
55 55 55 55 55
ULLDRREL
THD
45 45 45 45 45
DLLDRTRI
GTHD
75 75 75 75 75
DLLDRREL
THD
65 65 65 65 65
DrdOrLdrFlag FALSE FALSE E1F1/E2
TRUE
FALSE E1<U900
TRUE
E1<U900
TRUE
LDR Action
DLLDRFIRS
TACTION
CodeAdj CodeAdj CodeAdj CodeAdj CodeAdj
DLLDRSEC
ONDACTIO
N
InterFreqLD
HO
InterFreqLD
HO
InterFreqLDH
O
InterFreqLDH
O
InterFreqLDH
O
DLLDRTHI
RDACTION
BERateRed BERateRed BERateRed BERateRed BERateRed
ULLDRFIR
STACTION
InterFreqLD
HO
InterFreqLD
HO
InterFreqLDH
O
InterFreqLDH
O
InterFreqLDH
O
ULLDRSEC
ONDACTIO
N
BERateRed BERateRed BERateRed BERateRed BERateRed
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7.5.3 HO Parameters
Parameter U2100 F1 U2100 F2 U850 E1 U850 E2 U900 F3
Inter-frequency Neighbors
BlindHoFlag TRUE(F1F2/E1
Cosector)
FALSE to other
cells
TRUE(E1E2
Cosector)
FALSE to
other cells
FALSE to
other cells
SHO
1A/1B/1C/1D
THD Mapping Values
1A/1B/1C/1D
Trigger Timer Mapping values
Inter-frequency and Inter-RAT HO
2D/2F THD
CS Typical Value Ec/Io -15/-12dB RSCP -110/-107dBm
PS IRAT HO Disable
Muti-RAB follow CS IRAT Setting
2D/2F Trigger
Timer
TRIGTIME2D=D640, TRIGTIME2F=D1280( Mapping NSN setting)
TRIGTIME2D=D320, TRIGTIME2F=D1280(Mapping Ericsson setting)
Target GSM /
Target
frequecy THD
Mapping by cell leve, Typical Value:-90dBm(NSN) /-95dBm(Ericsson)
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8 Service Steering Strategy with 3Gis Roaming
8.1 Scenario 1: Metro-Co located U850 IDLE Mode with 3Gis Roaming
8.2 Scenario 2: Rural-Co located U850 IDLE Mode with 3Gis Roaming
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8.3 Scenario 3: Femto IDLE Mode with 3Gis Roaming
9 Cell SPG Definition
Carriers Strategy F1 F2 E1 E2 U900 F1
SPG ID 2 1 2 1 2
PriorityServiceForR99RT 1 1 1 1 1
PriorityServiceForR99NRT 1 1 1 1 1
PriorityServiceForHSDPA 3 1 3 1 3
PriorityServiceForHSUPA 3 1 3 1 3
PriorityServiceForExtRab 3 1 3 1 3
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10 Summary
10.1 Load Balance vs Service Steering
According to previous project experience, Load balance can get better PS KPIs, but it
impacted to CS service a little. Currently load balance strategy is prefer solution from HQ.
10.1.1 PS CSSR
Below chart shows that strategy change from service steering to load balance, PS CSSR
improved a lot.
10.1.2 CS CSSR
But load balance will impact CS performance a little due to load balance will generate higher
cell load. Ec/Io will be worse than service steering.
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10.1.3 CS and HSDPA traffic
After strategy change from service steering to load balance, voice traffic decrease a little and
PS traffic increase definitely.
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10.1.4 CS InterRAT Success Ratio and Attempt
Due to strategy change from service steering to load balance, PS user will got better
performance. But Ec/Io will be worse than before. Hencely CS IRAT attempt will triggered more
due to Ec/Io.
11 Conclusion
To balance the KPIs and voice user experience, HQ still recommend load balance strategy as
preferred solution. So when we start a new project, it is very important to confirm with customer
about the multi-layer strategy.
Performance Aspect Service Steering Load Balance Gain
PS CSSR 97.01% 99.42% +2.41%
CS CSSR 98.5% 98.39% -0.11%
CS Traffic 5500 Erlang 5000 Erlang -9%
HSDPA Traffic 287kbps 494kbps +71.81%
CS IRAT HO Attempt 7500 times 8200 times +9%