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HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
Huawei Confidential
Security Level: Internal 2013/6/30
UMTS Multi-Carrier Strategy
and Configuration
Hu Mingchao
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 2
Two-carrier strategy introduce
Strategy 1
Strategy 2 (Recommend)
Strategy 3
Strategy 4
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 3
Two-carrier strategy introduce Strategy 1 F1 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 3 Camp on F1, Service steering.
R99+HSPA
R99+HSPA
F1
F2
R99+HSPA R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
R99+HSPA
Strategy 4 Camp on F1, Load balance.
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 4
Two-carrier strategy introduce
Strategy 1
Strategy 2 (Recommend)
Strategy 3
Strategy 4
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 5
UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 1
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 6
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
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 7
UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 1
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 8
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
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 9
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+ HSDPA R99+ 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
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 10
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. Huawei Confidential Page 11
UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 1
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 12
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;
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 13
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 relation Unidirectional neighboring relation Unidirectional blind HO neighbouring
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 14
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 relation Unidirectional neighboring relation Unidirectional blind HO neighbouring
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 15
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;
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 16
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;
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 17
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
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 18
Two-carrier strategy introduce
Strategy 1
Strategy 2 (Recommend)
Strategy 3
Strategy 4
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 19
UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 2 (Recommend)
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 20
Idle Mode Selection/Reselection strategy2
R99+HSDPA R99+HSDPA
HSDPA+R99
R99+ HSDPA
F1
F2 Strategy 2: Camp on F1 or F2 randomly
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 21
UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 2 (Recommend)
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 22
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
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 23
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
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. Huawei Confidential Page 24
UE with Idle Mode Strategy
UE with Connected Mode Strategy
Parameters configuration
Strategy 2 (Recommend)
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 25
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;
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 26
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 relation Unidirectional neighboring relation Bidirectional blind HO neighbouring
R99+HSDPA R99+HSDPA
R99+HSDPA
F1
F2
R99+HSDPA
R99+HSDPA
R99+HSDPA
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 27
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 relation Unidirectional neighboring relation Bidirectional blind HO neighbouring
R99+HSDPA R99+HSDPA
R99+HSDPA
F1
F2
R99+HSDPA
R99+HSDPA
R99+HSDPA
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 28
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;
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 29
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;
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 30
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
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 31
Two-carrier strategy introduce
Strategy 1
Strategy 2 (Recommend)
Strategy 3
Strategy 4
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 32
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
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 33
Moving strategy:
Neighbor cell configuration:
F1
F2
intra-Freq Neighbor Inter-freq blind HO
neighbor Common inter-freq
neighbor
Inter-RAT neighbor cell
GSM
F1
F2
GSM
Intra-Freq HO Access DRD IRAT 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
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 34
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)
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 35
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 relation Unidirectional neighboring relation Bidirectional blind HO neighbouring
R99+HSDPA R99+HSDPA
R99+HSDPA
F1
F2
R99+HSDPA
R99+HSDPA
R99+HSDPA
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 36
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 relation Unidirectional neighboring relation Bidirectional blind HO neighbouring
R99+HSDPA R99+HSDPA
R99+HSDPA
F1
F2
R99+HSDPA
R99+HSDPA
R99+HSDPA
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 37
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;
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 38
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;
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 39
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
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 40
Two-carrier strategy introduce
Strategy 1
Strategy 2 (Recommend)
Strategy 3
Strategy 4
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 41
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 Strategy Accessed 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
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 42
Moving strategy:
Neighbor cell configuration:
F1
F2
GSM
Strategy 4: Camp on F1 and Load balance
intra-Freq Neighbor Inter-freq blind HO
neighbor Common inter-freq
neighbor
Inter-RAT neighbor cell
F1
F2
GSM
Intra-Freq HO Access DRD IRAT 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