HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
Huawei Confidential
Security Level: Internal 23/4/22
UMTS Multi-Carrier Strategy and Configuration
Hu Mingchao
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Two-carrier strategy introduce
Strategy 1
Strategy 2 (Recommend)
Strategy 3
Strategy 4
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Two-carrier strategy introduceStrategy 1F1 only supports R99;F2 cell is barred and UE camp on F1.
Strategy 2 (Recommend)Camp on F1 or F2 randomly,Load balance
R99
R99+HSPA
F1
F2
R99
R99+HSPA
R99
R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
F1
F2
R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
F1
F2
R99+HSPA R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
Strategy 3Camp on F1,Service steering.
R99+HSPA
R99+HSPA
F1
F2
R99+HSPA R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
Strategy 4Camp on F1, Load balance.
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Two-carrier strategy introduce
Strategy 1
Strategy 2 (Recommend)
Strategy 3
Strategy 4
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UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 1
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Idle Mode Selection/Reselection strategy1
R99+HSDPA R99
HSDPA+R99(Barred)
R99+ HSDPA
F1
F2
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.
Reselect F1 after finish a call on F2
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UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 1
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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.
R99 R99
R99+HSDPA
R99 R99
R99+HSDPA
R99+HSDPA R99
HSDPA+R99
R99+HSDPA R99
HSDPA+R99
Initiates HSDPA Service on F1
Setup HSDPA service on F2
F1
F2
DRD to F2 based on service
HSDPA users DRD from F1 to F2
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Connected mode mobility strategy (2/2)
HSDPA inter-freq HHO from F2 to F1 – leaving a hotspot
R99
HSDPA+R99
R99 R99+ HSDPA
HSDPA+R99
R99
HSDPA+r99
R99
HSDPA+R99
DRD to F2 to HSDPA
Intra-freq HO to DCH
R99+ HSDPA
User with HSDPA service
R99+ HSDPAR99+ HSDPA
HSDPA DRD from F1 to F2 – entering a hotspot
R99 R99+ HSDPA
HSDPA+R99
HSDPA service inter-freq HHO to F1.
User with HSDPA service in F2
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Combined Service for Connected UE Strategy ◆ For Combined Service:
→Scenario AStep1: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;
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UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 1
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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_SWITCH-1&HSUPA_DRD_SWITCH-1&INTER_HO_D2H_DRD_SWITCH-1&INTRA_HO_D2H_DRD_SWITCH-1&RAB_DCCC_DRD_SWITCH-1&RAB_MODIFY_DRD_SWITCH-1&RAB_SETUP_DRD_SWITCH-1;
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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
R99+HSDPA
F1
F2
R99
R99+HSDPA
R99+HSDPA
Bidirectional neighboring relationUnidirectional neighboring relationUnidirectional blind HO neighbouring
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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
Parameter Configuration (3/5)
R99+HSDPA R99
R99+HSDPA
F1
F2
R99
R99+HSDPA
R99+HSDPA
Bidirectional neighboring relationUnidirectional neighboring relationUnidirectional blind HO neighbouring
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Parameter Configuration (4/5)
5. Load Control, open F1 uplink &downlink LDR algorithm Set the LDR algorithm switch:
MOD CELLALGOSWITCH: NBMLdcAlgoSwitch=UL_UU_LDR-1&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
No R99 and HSPA interference in F1.
Advantage
Lots of DRD attempts for HSPA service;
Only F2 can carry HSPA service;
Load is not balance between F1 and F2.
Disadvantage
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Two-carrier strategy introduce
Strategy 1
Strategy 2 (Recommend)
Strategy 3
Strategy 4
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UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 2 (Recommend)
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Idle Mode Selection/Reselection strategy2
R99+HSDPA R99+HSDPA
HSDPA+R99
R99+ HSDPA
F1
F2 Strategy 2: Camp on F1 or F2 randomly
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UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 2 (Recommend)
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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
R99+HSDPA R99+ HSDPA
HSDPA+R99
R99+HSDPA R99+ HSDPA
HSDPA+R99
HSDPA service inter-freq HHO to F1.
User with HSDPA service in F2
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Load balance strategy
Load balance between F1 and F2 in hotspots by DRD or LDR. R99 users can configured BE reduction as the first LDR actions.
F1
F2
R99+HSDPA R99+HSDPA R99+HSDPA
HSDPA+R99
User from F1 by DRD or
LDR
User from F2 by DRD or
LDR
Name Parameters introduction
LdbDRDOffsetDCHThe 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)
DlInterFreqHoCellLoadSpaceThd
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.
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UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 2 (Recommend)
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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_SWITCH-1&HSUPA_DRD_SWITCH-1&INTER_HO_D2H_DRD_SWITCH-1&INTRA_HO_D2H_DRD_SWITCH-1&RAB_DCCC_DRD_SWITCH-1&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;
Bidirectional neighboring relationUnidirectional neighboring relationBidirectional blind HO neighbouring
R99+HSDPA R99+HSDPA
R99+HSDPA
F1
F2
R99+HSDPA
R99+HSDPA
R99+HSDPA
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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
Parameter Configuration (3/5)
Bidirectional neighboring relationUnidirectional neighboring relationBidirectional blind HO neighbouring
R99+HSDPA R99+HSDPA
R99+HSDPA
F1
F2
R99+HSDPA
R99+HSDPA
R99+HSDPA
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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_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
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.
Advantage
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.
Disadvantage
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Two-carrier strategy introduce
Strategy 1
Strategy 2 (Recommend)
Strategy 3
Strategy 4
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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)
Idle Mode Strategy
Open the LDR algorithm, and set the LDR action as following:
Uplink: BE reduction->inter-Freq load HO->CS inter-RAT load HO
Downlink: Code Adjustment-> BE reduction->inter-Freq load HO->CS inter-RAT load HO
Connected mode Strategy
Open DRD algorithm switch;
Close combined service DRD switch.
Service steering DRD: ON
The SPG for R99 is same for F2&F1
The SPG for HSPA on F2 is higher than F1.
DCH Load balance DRD: OFF
HSDPA Load balance DRD: OFF
Accessed mode Strategy
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)
R99+HSPA
R99+HSPA
F1
F2
R99+HSPA R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
Strategy 3: Camp on F1 and Service Steering
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Moving strategy:
Neighbor cell configuration:
F1
F2
intra-Freq Neighbor Inter-freq blind HO neighbor Common inter-freq
neighborInter-RAT neighbor cell
GSM
F1
F2
GSM
Intra-Freq HO Access DRDIRAT HO based coverage IRAT HO 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.
Strategy 3: Camp on F1 and Service Steering
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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_SWITCH-1&HSUPA_DRD_SWITCH-1&INTER_HO_D2H_DRD_SWITCH-1&INTRA_HO_D2H_DRD_SWITCH-1&RAB_DCCC_DRD_SWITCH-1&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;
Bidirectional neighboring relationUnidirectional neighboring relationBidirectional blind HO neighbouring
R99+HSDPA R99+HSDPA
R99+HSDPA
F1
F2
R99+HSDPA
R99+HSDPA
R99+HSDPA
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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
Parameter Configuration (3/5)
Bidirectional neighboring relationUnidirectional neighboring relationBidirectional blind HO neighbouring
R99+HSDPA R99+HSDPA
R99+HSDPA
F1
F2
R99+HSDPA
R99+HSDPA
R99+HSDPA
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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_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, 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
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.
Advantage
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.
Disadvantage
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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
R99+HSPA
R99+HSPA
F1
F2
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 Connected mode StrategyAccessed 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)
Open the LDR algorithm, and set the LDR action as following:
Uplink: BE reduction->inter-Freq load HO->CS inter-RAT load HO
Downlink: Code Adjustment-> BE reduction->inter-Freq load HO->CS inter-RAT load HO
Open DRD algorithm switch;
Close combined service DRD switch.
DCH Load balance DRD: OFF HSDPA Load balance DRD: ON
Load balance DRD choice: user number
Load balance DRD offset for HSDPA: 5
Load balance DRD power remain threshold for HSDPA :90
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Moving strategy:
Neighbor cell configuration:
F1F2
GSM
Strategy 4: Camp on F1 and Load balance
intra-Freq Neighbor Inter-freq blind HO neighbor Common inter-freq
neighborInter-RAT neighbor cell
F1F2
GSM
Intra-Freq HO Access DRDIRAT HO based coverage IRAT HO 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.
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 43
Advantage and disadvantage of Strategy 4
The R99 service does not hard handover in not continuous coverage area for F2;
The resource of two carriers should be used fully.
Advantage
There are half HSPA users on F1,
and it 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.
Disadvantage
Thank You
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