multi-carrier rf strategy for v project in complicated scenario

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Muti-Carrier RF Strategy for V

Project

Huawei Technologies Co., Ltd.

All rights reserved



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



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



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


7.1.2 - 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


7.2.2 - 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


7.3.2 - 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



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



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



2 Carrier Plan for V Project

2.1 Carrier Plan for New Strategy



2.2 Carrier Plan for Existing NSN Strategy

2.3 Carrier Plan for Existing Ericsson Strategy



3 Legend definition



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



4.1.3 - HO Mode

4.2 Scenario 2: Rural-Co located U850





4.2.3 - HO Mode



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



4.4.2 IDLE Mode Parameter Setting(with 3Gis)


Cell Reselection


Qrxlevmin -58(-115dB

m)

-58(-115dB

m)

-58(-115dB

m)

-53(-105dB

m)

-58(-115dB

m)


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


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



4.4.4 LDR Parameters


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




4.4.5 HO Parameters




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)



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



5.3 Scenario 3: Femto IDLE/connected Mode with 3Gis Roaming



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.



7 Service Steering Strategy without 3Gis

Roaming

7.1 Scenario 1: Metro Scenario (U21A/U21B /U08A/U08B)





7.1.3 - HO Mode U2100 with continuous coverage



7.1.4 - HO Mode U2100 with incontinuous coverage

7.2 Scenario 2: Outer Metro Scenario (U21A/U08A)





7.2.3 - HO Mode U2100 with continuous coverage



7.2.4 - HO Mode U2100 with incontinuous coverage

7.3 Scenario 3: Rural-Co located U850





7.3.3 - HO Mode (1)



7.3.4 - HO Mode (2)

7.4 Scenario 4: Femto Idle/Connected Mode



7.5 Parameter Setting

7.5.1 IDLE Mode Parameter Setting


Cell Reselection


Qrxlevmin -58(-115dBm) -58(-115dBm) -58(-115dBm) -53(-105dBm) -58(-115dBm)


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


7.5.2 LDR Parameters


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



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


ULLDRFIR

STACTION

InterFreqLD

HO

InterFreqLD

HO

InterFreqLDH

O

InterFreqLDH

O

InterFreqLDH

O

ULLDRSEC

ONDACTIO

N




7.5.3 HO Parameters




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)



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



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



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.



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.



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%

multi-carrier rf strategy for v project in complicated scenario

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