UMTS Multi Carrier Strategy and Configuration 20100622

Security Level: Internal

2014/2/12

UMTS Multi-Carrier Strategy and Configuration

Hu Mingchao

HUAWEI TECHNOLOGIES CO., LTD.

www.huawei.com

Huawei Confidential

 Two-carrier strategy introduce  Strategy 1  Strategy 2 (Recommend)

 Strategy 3  Strategy 4

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Two-carrier strategy introduce Strategy 1 F2

R99+HSPA

R99+HSPA

R99+HSPA

F1

R99

R99

R99

F1 only supports R99; F2 cell is barred and UE camp on F1. R99+HSPA

Strategy 2 (Recommend) F2

R99+HSPA

R99+HSPA

R99+HSPA

F1

R99+HSPA

R99+HSPA

R99+HSPA

Camp on F1 or F2 randomly, Load balance R99+HSPA

Strategy 3 F2

R99+HSPA

F1

R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

Camp on F1, Service steering. R99+HSPA

Strategy 4 F2

R99+HSPA

F1

R99+HSPA

R99+HSPA

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R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

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Camp on F1, Load balance. R99+HSPA

Page 3

 Two-carrier strategy introduce  Strategy 1  Strategy 2 (Recommend)

 Strategy 3  Strategy 4

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Strategy 1  UE with Idle Mode Strategy  UE with Connected Mode Strategy  Parameters configuration

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Idle Mode Selection/Reselection strategy1

F2

Reselect F1 after finish a call on F2

R99+HSDPA

HSDPA+R99(Barred)

R99

R99+ HSDPA

F1

Strategy 1: F2 cell is barred to force UE to camp on F1 in idle mode. After service released in F2 cell, UE come back to F1 cell. when UE hang up in F2 cell, maybe UE will display “no service ” for a short time because F2 is barred.

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Strategy 1  UE with Idle Mode Strategy  UE with Connected Mode Strategy  Parameters configuration

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Connected mode mobility strategy (1/2) • F1 R99 calls are soft handover between intra-freq cells.

• F2 HSDPA Cell change between intra-freq cells if there exists continuous F2 coverage. • In hotspots, HSDPA calls are DRD from F1 to F2.

F2 F1

R99+HSDPA R99

R99 R99

Initiates HSDPA Service on F1

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HSDPA users DRD from F1 to F2

HSDPA+R99 R99+HSDPA

HSDPA+R99 R99+HSDPA R99 R99+HSDPA

DRD to F2 based on service

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R99

R99

Setup HSDPA service on F2

Page 8

Connected mode mobility strategy (2/2) HSDPA DRD from F1 to F2 – entering a hotspot HSDPA+r99 R99+ HSDPA

HSDPA+R99

R99

R99+ HSDPA

User with HSDPA service

HSDPA+R99

R99

R99+ HSDPA

DRD to F2 to HSDPA

Intra-freq HO to DCH

HSDPA inter-freq HHO from F2 to F1 – leaving a hotspot HSDPA+R99 R99

HSDPA+R99 R99+ HSDPA

R99

User with HSDPA service in F2

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R99+ HSDPA

HSDPA service inter-freq HHO to F1.

Page 9

R99

Combined Service for Connected UE Strategy ◆ For Combined Service: →Scenario A Step1:CS is established on F1; Step2:Established R99 PS service on F1 for HSDPA service request ; Step3:CS service is released; Step4:trigger DRD from F1 to F2, HSDPA service remain in F2;

→Scenario B: Step1:HSDPA terminals camp on F1; Step2:HSDPA service DRD from F1 to F2 and established on F2 finally; Step3:Combined HSDPA+CS will be remained on F2; Step4:If CS service released, HSDPA service remain in F2 OR If HSDPA service released, CS service remain in F2; HUAWEI TECHNOLOGIES CO., LTD.

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Strategy 1  UE with Idle Mode Strategy  UE with Connected Mode Strategy  Parameters configuration

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Parameter Configuration (1/5) 1. F2 is barred to force UE to camp on F1 MOD CELLACCESSSTRICT: CellId=xxxxx2, IsAccessClass0Barred=BARRED, IsAccessClass1Barred=BARRED, IsAccessClass2Barred=BARRED, IsAccessClass3Barred=BARRED, IsAccessClass4Barred=BARRED, IsAccessClass5Barred=BARRED, IsAccessClass6Barred=BARRED, IsAccessClass7Barred=BARRED, IsAccessClass8Barred=BARRED, IsAccessClass9Barred=BARRED, IsAccessClass10Barred=BARRED, IsAccessClass11Barred=BARRED, IsAccessClass12Barred=BARRED, IsAccessClass13Barred=BARRED, IsAccessClass14Barred=BARRED, IsAccessClass15Barred=BARRED, IdleCellBarred=BARRED, IdleIntraFreqReselection=NOT_ALLOWED, IdleTbarred=D320, ConnCellBarred=NOT_BARRED;

2. Setting DRD switch and close combined service switch. SET CORRMALGOSWITCH: HoSwitch=INTER_FREQ_HHO_SWITCH-1, HspaSwitch=HSDPA_STATE_TRANS_SWITCH-0&HSUPA_STATE_TRANS_SWITCH-0, DrdSwitch=COMB_SERV_DRD_SWITCH-0&DRD_SWITCH-1&HSDPA_DRD_SWITCH1&HSUPA_DRD_SWITCH-1&INTER_HO_D2H_DRD_SWITCH1&INTRA_HO_D2H_DRD_SWITCH-1&RAB_DCCC_DRD_SWITCH1&RAB_MODIFY_DRD_SWITCH-1&RAB_SETUP_DRD_SWITCH-1; HUAWEI TECHNOLOGIES CO., LTD.

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Parameter Configuration (2/5) 3. F1 and F2 configure to unidirectional blind HO. ADD INTERFREQNCELL: CellId=xxxx1, RncId=xxxxx, NCellId=xxxx2, SIB11Ind=TRUE, SIB12Ind=FALSE, TpenaltyHcsReselect=D0, BlindHoFlag=TRUE, NPrioFlag=FALSE;

R99+HSDPA

R99+HSDPA

R99+HSDPA

R99

R99

F2

R99+HSDPA

Bidirectional neighboring relation Unidirectional neighboring relation Unidirectional blind HO neighbouring

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F1

Parameter Configuration (3/5) 4. Neighbor cell configuration: a) F1 &F2 configure intra-Freq Neighbor each other; b) F2 configure inter-Freq unidirectional neighbor to F1 in the border covered by F2; c) F1& F2 configure the GSM neighbor cell. Intra-freq neighbour: ADD INTRAFREQNCELL: CellId=xxxxx, RncId=xxxxx, NCellId=xxxxx, SIB11Ind=TRUE, SIB12Ind=FALSE, TpenaltyHcsReselect=D0, NPrioFlag=FALSE; Inter-freq neighbour: ADD INTERFREQNCELL: CellId=xxxx2, RncId=xxxxx, NCellId=xxxx1, SIB11Ind=TRUE, SIB12Ind=FALSE, TpenaltyHcsReselect=D0, BlindHOFlag=FALSE, NPrioFlag=FALSE; Inter-RAT neighbour: ADD GSMNCELL

R99+HSDPA

R99+HSDPA

R99+HSDPA

R99

R99

F2

R99+HSDPA

Bidirectional neighboring relation Unidirectional neighboring relation Unidirectional blind HO neighbouring HUAWEI TECHNOLOGIES CO., LTD.

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F1

Parameter Configuration (4/5) 5. Load Control, open F1 uplink &downlink LDR algorithm 

Set the LDR algorithm switch: 



MOD CELLALGOSWITCH: NBMLdcAlgoSwitch=UL_UU_LDR1&DL_UU_LDR-1;

Set the LDR algorithm: 

MOD CELLLDR: CellId=xxxx1, DlLdrFirstAction= BERateRed, DlLdrSecondAction= NoAct, DlLdrThirdAction= NoAct, DlLdrFourthAction=NoAct, UlLdrFirstAction= BERateRed, UlLdrSecondAction= NoAct, UlLdrThirdAction=NoAct;

6. Configure F2 HSDPA code 

RNC 



MOD CELLHSDPA: CellId=xxxx2, AllocCodeMode=Manual, HsPdschCodeNum=1, HsScchCodeNum=2;CodeAdjForHsdpaSwitch=OFF;

NodeB Dynamic Code Switch 

SET MACHSPARA: LOCELL=xxxx2, DYNCODESW=OPEN;

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Parameter Configuration (5/5) 7. F2 I-RAT HO using RSCP, and close the EcIo by setting the lower

value. ADD CELLINTERRATHOCOV: CellId=xxxxx2, InterRatReportMode=PERIODICAL_REPORTING, InterRATCSThd2DEcN0=-24, InterRATR99PsThd2DEcN0=-24, InterRATHThd2DEcN0=-24;

8. Deactive the HSDPA function for the F1 cell. 

DEA CELLHSDPA:CELLID=xxxxF1;

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Advantage and disadvantage of Strategy 1 Advantage 

No R99 and HSPA interference in F1.

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Disadvantage 

Lots of DRD attempts for HSPA service;



Only F2 can carry HSPA service;



Load is not balance between F1 and F2.

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 Two-carrier strategy introduce  Strategy 1  Strategy 2 (Recommend)

 Strategy 3  Strategy 4

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Strategy 2 (Recommend)  UE with Idle Mode Strategy  UE with Connected Mode Strategy  Parameters configuration

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Idle Mode Selection/Reselection strategy2

F2

HSDPA+R99

R99+HSDPA

R99+HSDPA

Strategy 2: Camp on F1 or F2 randomly

R99+ HSDPA

F1

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Strategy 2 (Recommend)  UE with Idle Mode Strategy  UE with Connected Mode Strategy  Parameters configuration

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Connected mode mobility strategy 

F1 and F2 calls are soft handover between intra-freq cells.



HSDPA inter-freq HHO from F2 to F1 – leaving a hotspot

HSDPA+R99

R99+HSDPA

HSDPA+R99

R99+ HSDPA

R99+HSDPA

R99+ HSDPA

User with HSDPA service in F2 HSDPA service inter-freq HHO to F1.

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Load balance strategy User from F2 by DRD or LDR

HSDPA+R99

F2

F1

User from F1 by DRD or LDR

R99+HSDPA

R99+HSDPA

R99+HSDPA

Load balance between F1 and F2 in hotspots by DRD or LDR. R99 users can configured BE reduction as the first LDR actions.

Name

Parameters introduction

LdbDRDOffsetDCH

The threshold of remanent load offset between the current cell and the target cell when load balancing DRD is applied for DCH users. Recommended value: 5% (SET DRD)

LdbDRDOffsetHSDPA

The threshold of remanent load offset between the current cell and the target cell when load balancing DRD is applied for HSDPA users. Recommended value: 5% (SET DRD)

DlInterFreqHoCellLoad SpaceThd

The inter-frequency neighboring cell could be selected as the destination of load handover only when its load remaining space is larger than this threshold. Recommended value: 20% (ADD CELLLDR)

Notes: DRD and LDR will be introduced in detail in Load Control slides. HUAWEI TECHNOLOGIES CO., LTD.

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Strategy 2 (Recommend)  UE with Idle Mode Strategy  UE with Connected Mode Strategy  Parameters configuration

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Parameter Configuration (1/5) 1. Setting DRD switch and close combined service switch. SET CORRMALGOSWITCH: HoSwitch=INTER_FREQ_HHO_SWITCH-1, DrdSwitch=COMB_SERV_DRD_SWITCH-0&DRD_SWITCH-1&HSDPA_DRD_SWITCH1&HSUPA_DRD_SWITCH-1&INTER_HO_D2H_DRD_SWITCH1&INTRA_HO_D2H_DRD_SWITCH-1&RAB_DCCC_DRD_SWITCH1&RAB_MODIFY_DRD_SWITCH-1&RAB_SETUP_DRD_SWITCH-1;

Load balance DRD switch for HSDPA: 



SET DRD: ServiceDiffDrdSwitch=OFF, LdbDrdSwitchDCH=OFF, LdbDrdSwitchHSDPA=ON, LdbDRDchoice=UserNumber, LdbDRDOffsetHSDPA=5; MOD CELLDRD: CellId=0, ServiceDiffDrdSwitch=OFF, LdbDRDSwitchDCH=ON, LdbDRDSwitchHSDPA=ON, LdbDRDchoice=UserNumber;

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Parameter Configuration (2/5) 2. F1 and F2 configure to blind HO neighbor cell for the co-coverage cell each other. 



ADD INTERFREQNCELL: CellId=1, RncId=1, NCellId=2, SIB11Ind=TRUE, SIB12Ind=FALSE, TpenaltyHcsReselect=D0, BlindHOFlag=TRUE, NPrioFlag=FALSE; ADD INTERFREQNCELL: CellId=2, RncId=1, NCellId=1, SIB11Ind=TRUE, SIB12Ind=FALSE, TpenaltyHcsReselect=D0, BlindHOFlag=TRUE, NPrioFlag=FALSE;

R99+HSDPA

R99+HSDPA

R99+HSDPA

R99+HSDPA

R99+HSDPA

F2

R99+HSDPA

Bidirectional neighboring relation Unidirectional neighboring relation Bidirectional blind HO neighbouring

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F1

Parameter Configuration (3/5) 3. Neighbor cell configuration: a) F1 &F2 configure intra-Freq Neighbor each other; b) F2 configure inter-Freq unidirectional neighbor to F1 in the border covered by F2. c) F1& F2 configure the GSM neighbor cell. Intra-freq neighbour: ADD INTRAFREQNCELL: CellId=xxxxx, RncId=xxxxx, NCellId=xxxxx, SIB11Ind=TRUE, SIB12Ind=FALSE, TpenaltyHcsReselect=D0, NPrioFlag=FALSE; Inter-freq neighbour: ADD INTERFREQNCELL: CellId=xxxx2, RncId=xxxxx, NCellId=xxxx1, SIB11Ind=TRUE, SIB12Ind=FALSE, TpenaltyHcsReselect=D0, BlindHOFlag=FALSE, NPrioFlag=FALSE; Inter-RAT neighbour: ADD GSMNCELL

R99+HSDPA

R99+HSDPA

R99+HSDPA

R99+HSDPA

R99+HSDPA

F2

R99+HSDPA

Bidirectional neighboring relation Unidirectional neighboring relation Bidirectional blind HO neighbouring HUAWEI TECHNOLOGIES CO., LTD.

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F1

Parameter Configuration (4/5) 4. Load Control ,open F1 uplink &downlink LDR algorithm 

Set the LDR and DCCC algorithm switch: 





MOD CELLALGOSWITCH: NBMLdcAlgoSwitch=UL_UU_LDR1&DL_UU_LDR-1&CELL_CODE_LDR-1&CELL_CREDIT_LDR-1; SET CORRMALGOSWITCH: ChSwitch=DCCC_SWITCH-1, HspaSwitch=HSUPA_DCCC_SWITCH-1;

Set the LDR algorithm: 

MOD CELLLDR: CellId=0, DlLdrFirstAction=CodeAdj, DlLdrSecondAction=BERateRed, DlLdrThirdAction=InterFreqLDHO, DlLdrFourthAction=CSInterRatShouldBeLDHO, UlLdrFirstAction=BERateRed, UlLdrSecondAction=InterFreqLDHO,

5. Configure F2 HSDPA code 

RNC 



MOD CELLHSDPA: CellId=xxxx2, AllocCodeMode=Manual, HsPdschCodeNum=1, HsScchCodeNum=2;CodeAdjForHsdpaSwitch=OFF;

NodeB Dynamic Code Switch 

SET MACHSPARA: LOCELL=xxxx2, DYNCODESW=OPEN;

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Parameter Configuration (5/5) 6. F2 I-RAT HO using RSCP, and close the EcIo by setting the lower

value. ADD CELLINTERRATHOCOV: CellId=xxxxx2, InterRatReportMode=PERIODICAL_REPORTING, InterRATCSThd2DEcN0=-24, InterRATR99PsThd2DEcN0=-24, InterRATHThd2DEcN0=-24;

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Advantage and disadvantage of Strategy 2 Advantage 

Both F1 and F2 can establish and carry on HSPA service.



Balance load between F1 and F2



Keep DRD attempt in low quantity and it is good KPI for access.

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Disadvantage 

R99 and HSPA service establish in same cell, it would bring service interference each other, and it should be affect the call drop of AMR.



F2 should be covered in a large continuous area, otherwise it is not good feeling for AMR when the CS users hard handover between the inter frequency.

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 Two-carrier strategy introduce  Strategy 1  Strategy 2 (Recommend)

 Strategy 3  Strategy 4

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Strategy 3: Camp on F1 and Service Steering F2

R99+HSPA

F1

R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

Conditions：Continuous coverage for F1, not continuous coverage for F2 F1 & F2 can support the R99 and HSPA (recommend) or F1 support R99 and F2 support HSPA (not recommend)

Idle Mode Strategy 

Camp on F1 in idle mode  Cell reselection make UE camp on F1 cell in advance by setting the threshold and offset for inter-frequency cell reselection in idle mode .  Or forcibly camp：F2 cell is barred to force UE to camp on F1 in idle mode. (not recommend)

Accessed mode Strategy



Open DRD algorithm switch;



Close combined service DRD switch.



Service steering DRD: ON 



The SPG for R99 is same for F2&F1



Open the LDR algorithm, and set the LDR action as following: 



The SPG for HSPA on F2 is higher than F1.



DCH Load balance DRD:



HSDPA Load balance DRD: OFF

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Connected mode Strategy

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OFF

Page 32

Uplink: BE reduction->interFreq load HO->CS inter-RAT load HO Downlink: Code Adjustment> BE reduction->inter-Freq load HO->CS inter-RAT load HO

Strategy 3: Camp on F1 and Service Steering Neighbor cell configuration: F2 F1 GSM intra-Freq Neighbor

Inter-freq blind HO neighbor

Moving strategy:

Common inter-freq neighbor

Inter-RAT neighbor cell

F2 F1 GSM Intra-Freq HO

   

IRAT HO based coverage

IRAT HO

Access DRD

Inter-Freq HO based load for LDR

F1 &F2 configure intra-Freq Neighbor each other; F1 and F2 configure blind HO neighbor each other for the co-coverage cell, but not HO based coverage; F2 configure inter-Freq unidirectional neighbor to F1 in the border covered by F2; F1& F2 configure the GSM neighbor cell, and GSM congfigure the F1 neighbor cell.

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Parameter Configuration (1/5) 1. Setting DRD switch and close combined service switch. SET CORRMALGOSWITCH: HoSwitch=INTER_FREQ_HHO_SWITCH-1, DrdSwitch=COMB_SERV_DRD_SWITCH-0&DRD_SWITCH-1&HSDPA_DRD_SWITCH1&HSUPA_DRD_SWITCH-1&INTER_HO_D2H_DRD_SWITCH1&INTRA_HO_D2H_DRD_SWITCH-1&RAB_DCCC_DRD_SWITCH1&RAB_MODIFY_DRD_SWITCH-1&RAB_SETUP_DRD_SWITCH-1;

Service Steering DRD switch for HSDPA: 



SET DRD: ServiceDiffDrdSwitch=ON; ADD SPG: SpgId=1, PriorityServiceForR99RT=1, PriorityServiceForR99NRT=1, PriorityServiceForHSPA=2;



ADD SPG: SpgId=2, PriorityServiceForR99RT=1, PriorityServiceForR99NRT=1, PriorityServiceForHSPA=1;



MOD CELLSETUP: CellId=xxxxx1, SpgId=1; （F1）



MOD CELLSETUP: CellId=xxxxx2, SpgId=2; （F2）

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Parameter Configuration (2/5) 2. F1 and F2 configure to blind HO neighbor cell for the co-coverage cell each other. 



ADD INTERFREQNCELL: CellId=1, RncId=1, NCellId=2, SIB11Ind=TRUE, SIB12Ind=FALSE, TpenaltyHcsReselect=D0, BlindHOFlag=TRUE, NPrioFlag=FALSE; ADD INTERFREQNCELL: CellId=2, RncId=1, NCellId=1, SIB11Ind=TRUE, SIB12Ind=FALSE, TpenaltyHcsReselect=D0, BlindHOFlag=TRUE, NPrioFlag=FALSE;

R99+HSDPA

R99+HSDPA

R99+HSDPA

R99+HSDPA

R99+HSDPA

F2

R99+HSDPA

Bidirectional neighboring relation Unidirectional neighboring relation Bidirectional blind HO neighbouring

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F1

Parameter Configuration (3/5) 3. Neighbor cell configuration: a) F1 &F2 configure intra-Freq Neighbor each other; b) F2 configure inter-Freq unidirectional neighbor to F1 in the border covered by F2. c) F1& F2 configure the GSM neighbor cell. Intra-freq neighbour: ADD INTRAFREQNCELL: CellId=xxxxx, RncId=xxxxx, NCellId=xxxxx, SIB11Ind=TRUE, SIB12Ind=FALSE, TpenaltyHcsReselect=D0, NPrioFlag=FALSE; Inter-freq neighbour: ADD INTERFREQNCELL: CellId=xxxx2, RncId=xxxxx, NCellId=xxxx1, SIB11Ind=TRUE, SIB12Ind=FALSE, TpenaltyHcsReselect=D0, BlindHOFlag=FALSE, NPrioFlag=FALSE; Inter-RAT neighbour: ADD GSMNCELL

R99+HSDPA

R99+HSDPA

R99+HSDPA

R99+HSDPA

R99+HSDPA

F2

R99+HSDPA

Bidirectional neighboring relation Unidirectional neighboring relation Bidirectional blind HO neighbouring HUAWEI TECHNOLOGIES CO., LTD.

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F1

Parameter Configuration (4/5) 4. Load Control ,open F1 uplink &downlink LDR algorithm 

Set the LDR and DCCC algorithm switch: 





MOD CELLALGOSWITCH: NBMLdcAlgoSwitch=UL_UU_LDR-1&DL_UU_LDR1&CELL_CODE_LDR-1&CELL_CREDIT_LDR-1; SET CORRMALGOSWITCH: ChSwitch=DCCC_SWITCH-1, HspaSwitch=HSUPA_DCCC_SWITCH-1;

Set the LDR algorithm: 

MOD CELLLDR: CellId=0, DlLdrFirstAction=CodeAdj, DlLdrSecondAction=BERateRed, DlLdrThirdAction=InterFreqLDHO, DlLdrFourthAction=CSInterRatShouldBeLDHO, UlLdrFirstAction=BERateRed, UlLdrSecondAction=InterFreqLDHO, UlLdrThirdAction=CSInterRatShouldNotLDHO;

5. Configure F2 HSDPA code 

RNC 



MOD CELLHSDPA: CellId=xxxx2, AllocCodeMode=Manual, HsPdschCodeNum=1, HsScchCodeNum=2;CodeAdjForHsdpaSwitch=OFF;

NodeB Dynamic Code Switch 

SET MACHSPARA: LOCELL=xxxx2, DYNCODESW=OPEN;

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Parameter Configuration (5/5) 6. F2 I-RAT HO using RSCP, and close the EcIo by setting the lower value. ADD CELLINTERRATHOCOV: CellId=xxxxx2, InterRatReportMode=PERIODICAL_REPORTING, InterRATCSThd2DEcN0=-24, InterRATR99PsThd2DEcN0=-24, InterRATHThd2DEcN0=-24;

7. Cell reselection make UE camp on F1 cell in advance by setting the threshold and offset for inter-frequency cell reselection in idle mode. 

F1: MOD UCELLSELRESEL: CellId=xxxxxx, IdleSintersearch=0;



F2: MOD UCELLSELRESEL: CellId=xxxxxx, IdleSintersearch=9;



F1->F2: ADD INTERFREQNCELL: RncId=x, CellId=xxxxx, NCellRncId=x, NCellId=xxxxx, IdleQoffset1sn=50, IdleQoffset2sn=50;



F2->F1: ADD INTERFREQNCELL: RncId=x, CellId=xxxxx, NCellRncId=x, NCellId=xxxxx, IdleQoffset1sn=-50, IdleQoffset2sn=-50;

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Advantage and disadvantage of Strategy 3 Advantage 



The interference is small between the HSPA service and the AMR. It should be good feeling for R99 service when F2 is not continuous coverage, because the R99 service does not hard handover in this area.

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Disadvantage 

The HSPA accessibility should be affect by the DRD.



The HSPA call drop should be increase when HSPA service move with the hard handover in these not continuous coverage area for F2.



PS call drop should be increase when opening the function of state transition.

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 Two-carrier strategy introduce  Strategy 1  Strategy 2 (Recommend)

 Strategy 3  Strategy 4

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Strategy 4: Camp on F1 and Load balance F2

R99+HSPA

F1

R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

R99+HSPA

Conditions：Continuous coverage for F1, not continuous coverage for F2 F1 & F2 can support the R99 and HSPA A few AMR users, most users is HSPA.

Idle Mode Strategy 

Camp on F1 in idle mode 



Cell reselection make UE camp on F1 cell in advance by setting the threshold and offset for inter-frequency cell reselection in idle mode . Or forcibly camp：F2 cell is barred to force UE to camp on F1 in idle mode. (not recommend)

Accessed mode Strategy 

Open DRD algorithm switch;



Close combined service DRD switch.



DCH Load balance DRD:



HSDPA Load balance DRD: ON

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OFF



Load balance DRD choice: user number



Load balance DRD offset for HSDPA: 5

Connected mode Strategy 

Open the LDR algorithm, and set the LDR action as following: 





Load balance DRD power remain threshold for HSDPA :90

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Uplink: BE reduction->interFreq load HO->CS inter-RAT load HO Downlink: Code Adjustment> BE reduction->inter-Freq load HO->CS inter-RAT load HO

Strategy 4: Camp on F1 and Load balance Neighbor cell configuration: F2 F1 GSM intra-Freq Neighbor

Inter-freq blind HO neighbor

Common inter-freq neighbor

Inter-RAT neighbor cell

Moving strategy: F2 F1 GSM Intra-Freq HO

   

IRAT HO based coverage

IRAT HO

Access DRD

Inter-Freq HO based load for LDR

F1 &F2 configure intra-Freq Neighbor each other; F1 and F2 configure blind HO neighbor each other for the co-coverage cell, but not HO based coverage; F2 configure inter-Freq unidirectional neighbor to F1 in the border covered by F2; F1& F2 configure the GSM neighbor cell, and GSM congfigure the F1 neighbor cell.

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Advantage and disadvantage of Strategy 4 Advantage 



The R99 service does not hard handover in not continuous coverage area for F2;

Disadvantage 

will interfere the AMR users. 

The accessibility should be affect by the half users DRD



It should be ease congestion in F1 when there are many traffic for R99 in F1, and it is bad feeling for HSPA service in F1.



PS call drop should be increase when opening the function of state transition.

The resource of two carriers should be used fully.

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There are half HSPA users on F1, and it

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Thank You www.huawei.com