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Module 13JK10049AAAAZZZZA Edition 1
Section 5Mobility Idle Mode
9300 W-CDMAUA06 R99 Algorithms Description
TMO18045 Edition 1
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9300 W-CDMA � UA06 R99 Algorithms DescriptionMobility Idle Mode
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Blank Page
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9300 W-CDMA � UA06 R99 Algorithms DescriptionMobility Idle Mode
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Module Objectives
Upon completion of this module, you should be able to:
� Describe PLMN selection and associated parameters
� Describe Cell selection and associated parameters in Idle Mode
� Describe Cell reselection and associated parameters in Idle Mode
� Case of mobility in Connected Mode in Cell_FACH, Cell_PCH or URA_PCH
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Module Objectives [cont.]
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9300 W-CDMA � UA06 R99 Algorithms DescriptionMobility Idle Mode
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Table of Contents
Switch to notes view!
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9300 W-CDMA � UA06 R99 Algorithms DescriptionMobility Idle Mode
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Table of Contents [cont.]
Switch to notes view!
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9300 W-CDMA � UA06 R99 Algorithms DescriptionMobility Idle Mode
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1 Network Selection
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1 Network Selection
1.1 PLMN Selection
� Describe Cell reselection and associated parameters
MCC MNC MSIN
mobileCountryCode (Operator)
mobileNetworkCode (Operator)
mobileCountryCode (RNC)
mobileNetworkCode (RNC)
mobileCountryCode (CsCoreNetworkAccess)
mobileNetworkCode (CsCoreNetworkAccess)
mobileCountryCode (PsCoreNetworkAccess)
mobileNetworkCode (PsCoreNetworkAccess)
mobileCountryCode (FDDCell)
mobileNetworkCode (FDDCell)
MIB / P
-CCPCH
Preferred PLMN List Forbidden PLMN List
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2 Cell Selection in Idle Mode
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2 Cell Selection in Idle Mode
2.1 Cell Selection Criteria
Srxlev > 0
����
CPICH_RSCP > qRxLevMin + Pcompensation
P-CPIC
H
S Criteria
AND
qQualMin
qRxLevMin
Squal > 0
����
CPICH_Ec/No > qQualMin
FDDCCe
ll
FDDCell
CellSelectionInfo
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2 Cell Selection in Idle Mode
2.2 UE Power Compensation
NodeB
RNC
FDDCell
CellSelectionInfo
RadioAccessService
DedicatedConf
PowerConfClass
Pcompensation=
max (sibMaxAllowedUlTxPowerOnRach – P_MAX, 0)
Srxlev > 0
����
CPICH_RSCP > qRxLevMin + Pcompensation
+21 dBm4
+24 dBm3
+27 dBm2
+33 dBm1
P_MAXUE Class
qRxLevMinsibMaxAllowedUlTxPowerOnRach
powerConfId
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3 Cell Reselection in Idle Mode Principles
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3 Cell Reselection in Idle Mode Principles
3.1 General Concept
HM not detectedCell Reselection after tReselection
Higher priority is favored
HM detectedCell Reselection after tReselection * speedDependScalingFactor
Lower priority is favored
P1
P2 P2 P2
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P3 P3 P3 P3 P3P3
� 2 different 3GPP UE algorithms
� Classical for mono-layer network
� Hierarchical Cell Structure (HCS) algorithm� HCS Priority for Serving cell and Neighboring cells are introduced (between 0 and 7)
� Both algorithms steps:
� Define which type of neighboring cells have to be measured (intra-freq, inter-freq, inter-RAT)
� Check if measured cells are eligible to cell reselection
� Rank the eligible cells to eventually perform cell reselection
� Different behaviors in case:� HCS is used / NOT used
� High-Mobility Detection (HMD) is detected / NOT detected
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3 Cell Reselection in Idle Mode Principles
3.2 Mobility in Idle mode, Cell_FACH, Cell_PCH and URA_PCH
Cell SelectionS criterion
Cell Reselection without HCS
Measurements Rules without HCS
Cell Ranking without HCSusing High Mobility Detection
Level + QualityR criteria
Cell Reselection with HCS
Measurements Rules with HCS
using High Mobility Detection
Quality Level Threshold H Criterion
Cell Ranking with HCSusing High Mobility Detection
HCS is usedHCS is not used
Level + QualityR criteria
Cell Filteringusing HCS Priority
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3 Cell Reselection in Idle Mode Principles
3.3 Idle Mode Neighboring List
sib11AndDchNeighbouringFddCellAlgo
(FDDCell)
sib11OrDchUsage
(UMTSFddNeighbouringCell)
(GsmNeighbouringCell)
SIB11 /
P-CCPC
H
Serving
Cell
Max 48 cells
SIB11 Neighboring List
• UMTSFddNeighbouringCell List
• GsmNeighbouringCell List
FDDCell Neighboring List
• intra-frequency FDDCells
• inter-frequency FDDCells
• GSM Cells
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3 Cell Reselection in Idle Mode Principles
3.4 Cell Reselection Eligibility Criteria
UMTSFddNeighbouringCell
Srxlev > 0Squal > 0
> > + PcompensationCPICH_Ec/No qQualMin (UMTSFddNeighbouringCell) qRxLevMin(UMTSFddNeighbouringCell)
CPICH_RSCPAND
GSMNeighbouringCell
QRxLeavMeas > qRxLevMin (GSMNeighbouringCell) + Pcompensation
Srxlev > 0
Max(MaxAllowedUlTxPower - P_max, 0)
(GSMNeighbour/GsmCell)
Max(MaxAllowedUlTxPower - P_max, 0)
(UmtsNeigbouringRelation)
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3 Cell Reselection in Idle Mode Principles
3.5 High Mobility Detection
Nb of Reselection > nCrduring tCrMax
UE not in High Mobility state
UE enters High Mobility state
Nb of Reselection <= nCrduring tCrMax + tCrMaxHyst
nCr
tCrMax
tCrMaxHyst
FDDCell
CellSelectionInfo
CrMgt
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4 Cell Reselection in Idle Mode without HCS
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4 Cell Reselection in Idle mode without HCS
4.1 Measurements Rules without HCS
sIntraSearch
sInterSearch
sSearchRatGsm
isHcsUsed = FalsesSearchHcs
sHcsRatGsm
Intra-frequency No measurement
Intra-frequency Inter-frequency Inter-frequency
Intra-frequency Inter-frequency
GSM Inter-frequency
GSM
Srxlev
sInterSearch sIntraSearch sSearchRatGsm
sSearchHcs
sHcsRatGsm
Squal
FDDCell
CellSelectionInfo
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4 Cell Reselection in Idle mode without HCS
4.2 Level Ranking Criterion without HCS
qHyst1 (CellSelectionInfo)
UMTSFddNeighbouringCell
GSMNeighbouringCell
CPICH_RSCP qOffset1sn (UMTSFddNeighbouringCell)CPICH_RSCPRLs = +
RL criterion for Serving Cell RL criterion for FDD Neighboring Cell
RLn = –
FDDCell
RxLev qOffset1sn (GSMNeighbouringCell)RLn = –
RL criterion for GSM Neighboring Cell
qHyst1 (CellSelectionInfo)
qOffset1sn (UmtsNeighbouringRelation)
qOffset1sn (GsmNeighbouringCell)
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4 Cell Reselection in Idle mode without HCS
4.3 Quality Ranking Criterion without HCS
RQn = –RQs = +CPICH_Ec/No CPICH_Ec/NoqHyst2 (CellSelectionInfo) qOffset2sn (UMTSFddNeighbouringCell)
RQ criterion for Serving Cell RQ criterion for Neighboring Cell
FDDCell UMTSFddNeighbouringCell
qHyst2 (CellSelectionInfo)
qOffset2sn (UmtsNeighbouringRelation)
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4 Cell Reselection in Idle mode without HCS
4.4 Cell Ranking Algorithm
FDDCell
CPICH_Ec/No CPICH_RSCP
Best cell is a ..?
Best GSMCellis reselected
GSMCell
Best FDDCellafter First Ranking
is reselected
Best FDDCellafter Second Ranking
is reselected
qualMeas = ..?
Eligible CellsFirst Ranking RL
(CPICH_RSCP & RxLev)
Second Ranking RQ
(CPICH_Ec/No)
qualMeas (cellSelectionInfo)
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4 Cell Reselection in Idle mode without HCS
4.5 Triggering Algorithm
UMTSFddNeighbouringCellInter-freq
UMTSFddNeighbouringCellIntra-freq
GSMNeighbouringCell
ServingFDDCell
tReselection (UE not in High Mobility)tReselection x speedDependScalingFactorTReselection (UE in High Mobility)
tReselectionx interRatScalingFactorTReselection(UE not in High Mobility)
tReselectionx speedDependScalingFactorTReselectionx interRatScalingFactorTReselection(UE in High Mobility)
tReselection x interFreqScalingFactorTReselection (UE not in High Mobility)tReselection x speedDependScalingFactorTReselection x interFreqScalingFactorTReselection (UE in High Mobility)
speedDependScalingFactorTReselection
(CrMgt)
tReselectioninterFreqScalingFactorTReselectioninterRatScalingFactorTReselection
(CellSelectionInfo)
� Cell reselection triggered if
� the target cell remains best-ranked during more than tReselection sec
� the UE has been camping on the current serving cell since at least 1 sec
� For R5 UE, tReselection is replaced by
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Exercise: Multi-Layer Cell Structure, HCS not used
Neighb.MC
Neighb.MA Neighb.MB
Serv.mc
Macro FDDcells F2
Micro FDDcells F1
Neighb.GC
Neighb.GA Neighb.GBMacro GSMcells
Neighbo.mbNeighbo.ma
20-73Neighboring cell GC
20-80Neighboring cell GB
20-98Neighboring cell GA
100-85-4Neighboring cell MC
100-89-5Neighboring cell MB
100-99-9Neighboring cell MA
00-104-10Neighboring cell mb
00-118-21Neighboring cell ma
44-108-12Serving cell mc
qOffset2sn(dB)
qHyst2(dB)
qOffset1sn(dB)
qHyst1(dB)
CPICH_RSCP (dBm)
CPICH_Ec/No (dB)
Cell
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Exercise: Multi-Layer Cell Structure, HCS not used [cont.]
� Assumptions� UE class 3
� qualMeas = qualMeasEcno
� qQualmin (Serving and Neighboring Cell 3G) = - 16 dB
� qRxLevMin (Serving and Neighboring Cell 3G) = - 115 dBm
� qRxLevMin (Neighboring Cell 2G) = - 104 dBm
� sibMaxAllowedUlTxPowerOnRach = 24 dBm
� maxAllowedUlTxPower (Neighboring Cell 3G) = 24 dBm
� maxAllowedUlTxPower (Neighboring Cell 2G) = 33 dBm• sIntraSearch = 8dB
• sInterSearch = 6dB
• sSearchRatGSM = 4dB
• sSearchHcs = 0dB• sHcsRatGsm = 0dB
• isHcsUsed = False
� Question: which is the cell reselected by the UE ?
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5 Cell Reselection in Idle Mode with HCS
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5 Cell Reselection in Idle Mode with HCS
5.1 Principles
hcsPrio (hcsCellparam)
hcsPrio (UmtsNeighbouringHcsCellparam)
hcsPrio (GsmHcsCellparam)
� Each cell is assigned an HCS Priority value between 0 and 7
0 = lowest priority
7 = highest priority
P1
P3
HM not detected Higher priority is favored
HM detected Lower priority is favored
P2 P2
P3 P3 P3
Cop
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5 Cell Reselection in Idle Mode with HCS
5.2 Measurements Rules with HCS in Low Mobility
isHcsUsed (FDDCell) = True� UE not in High Mobility state
Intra-frequency Inter-frequency
hcsPrion >= hcsPrios
Intra-frequency Inter-frequency
hcsPrion > hcsPrios
All Intra-frequency All Inter-frequency
GSM
hcsPrion >= hcsPrios
No measurement
All GSM
Srxlev
sInterSearch sIntraSearch Squal
sSearchHcs
Srxlev
Squal
sHcsRatGsm
sSearchRatGsm sLimitSearchRat
sLimitSearchRat
(HcsCellParam)
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5 Cell Reselection in Idle Mode with HCS
5.3 HCS Quality Level Threshold Criterion
Qmeasn qHcsnHn = –
qHcss
NeighbouringCellhcsPriorityn = hcsPrioritys
NeighbouringCellhcsPriorityn <> hcsPrioritys
Qmeasn qHcsnQmeassHs = –
H criterion for Serving CellH criterion for FDD or GSM Neighboring Cellof same HCS priority as Serving cell
Hn = –
FDDCellhcsPrioritys
H criterion for FDD or GSM Neighboring Cellof different HCS priority than Serving cell
qHcs (hcsCellparam)
qHcs (UmtsNeighbouringHcsCellparam)
qHcs (GsmHcsCellparam)
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5 Cell Reselection in Idle Mode with HCS
5.4 Measurements Rules with HCS in High Mobility
� UE in High Mobility state
Intra-frequency Inter-frequency
hcsPrion <= hcsPrios
All Intra-frequency All Inter-frequency
GSM
hcsPrion <= hcsPrios
All GSM
Srxlev
sInterSearch sIntraSearch Squal
Srxlev
Squal sSearchRatGsm sLimitSearchRat
sSearchHcs
sHcsRatGsm
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5 Cell Reselection in Idle Mode with HCS
5.5 Level and Quality Ranking Criteria with HCS
qHysts
NeighbouringCellhcsPriorityn = hcsPrioritys
NeighbouringCellhcsPriorityn <> hcsPrioritys
QmeassRs = +
R criterion for Serving Cell
R criterion for FDD or GSM Neighboring Cellof same HCS priority as Serving cell
FDDCellhcsPrioritys
Qmeasn qOffsetsns,nRn = –
R criterion for FDD or GSM Neighboring Cellof different HCS priority than Serving cell
Qmeasn qOffsetsns,nRn = –
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5 Cell Reselection in Idle Mode with HCS
5.6 HCS Cell Filtering in Low Mobility
UE is in High Mobility
state ?
Eligible Cellsaccording to S criteria
Candidate Cells Ranking
R criteria
yes
At least one cell has
H criterion >=0 ?
no
Keep all neighboring FDD and GSM cells
of the highest hcsPriority as candidates
among those having H criterion >=0
yes
Keep all neighboring
FDD and GSM cellsas candidates
without ordering them
no
See next page
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5 Cell Reselection in Idle Mode with HCS
5.7 HCS Cell Filtering in High Mobility
Keep all neighboring FDD and GSM cells of the highest hcsPriority as candidates
among those having1. hcsPriorityn < hcsPrioritys
2. H criterion >=0
Candidate Cells Ranking
R criteria
UE in High Mobility
Keep all neighboring FDD and GSM cells of the lowest hcsPriority as candidates
among those having 1. hcsPriorityn >= hcsPrioritys
2. H criterion >=0
not empty list
Keep all neighboring FDD and GSM cellsas candidates
without ordering them
empty list
not empty list
empty list
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5 Cell Reselection in Idle Mode with HCS
5.8 Cell Ranking Algorithm
FDDCell
CPICH_Ec/No CPICH_RSCP
Best cell is a ..?
Best GSMCellis reselected
GSMCell
Best FDDCellafter First Ranking
is reselected
Best FDDCellafter Second Ranking
is reselected
qualMeas = ..?
First Ranking RL
(CPICH_RSCP & RxLev)
Second Ranking RQ
(CPICH_Ec/No)
Candidate NeighboringFDD and GSM cells for
Cell Reselection
Same Ranking as without HCS
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5 Cell Reselection in Idle Mode with HCS
5.9 Triggering Algorithm
tReselection (CellSelectionInfo)
interFreqScalingFactorTReselection (CellSelectionInfo)
interRatScalingFactorTReselection (CellSelectionInfo)
UMTSFddNeighbouringCellInter-freq
UMTSFddNeighbouringCellIntra-freq
GSMNeighbouringCell
ServingFDDCell
tReselection (UE not in High Mobility)tReselection x speedDependScalingFactorTReselection (UE in High Mobility)
tReselectionx interRatScalingFactorTReselection(UE not in High Mobility)
tReselection x speedDependScalingFactorTReselectionx interRatScalingFactorTReselection(UE in High Mobility)
tReselection x interFreqScalingFactorTReselection (UE not in High Mobility)tReselection x speedDependScalingFactorTReselection x interFreqScalingFactorTReselection (UE in High Mobility)
speedDependScalingFactorTReselection (CrMgt)
Same triggering as without HCS
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Exercise: Multi-Layer Cell Structure, HCS used
Neighb.MC
Neighb.MA Neighb.MB
Serv.mc
Macro FDDcells F2
Micro FDDcells F1
Neighb.GC
Neighb.GA Neighb.GB
Macro GSMcells
Neighbo.mbNeighbo.ma
0
0
0
0
0
qOffset2sn(dB)
0
0
0
1
1
1
2
2
2
hcsPriority
-1000-73Neighboring cell GC
-1000-80Neighboring cell GB
-1000-98Neighboring cell GA
-140-85-4Neighboring cell MC
-140-89-5Neighboring cell MB
-140-99-9Neighboring cell MA
-100-104-10Neighboring cell mb
-100-118-21Neighboring cell ma
-1044-108-12Serving cell mc
qHcs(dB)
qHyst2(dB)
qOffset1sn(dB)
qHyst1(dB)
CPICH_RSCP (dBm)
CPICH_Ec/No (dB)
Cell
hcsPriority = 0
hcsPriority = 1
hcsPriority = 2
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9300 W-CDMA � UA06 R99 Algorithms DescriptionMobility Idle Mode
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Exercise: Multi-Layer Cell Structure, HCS used [cont.]
� Assumptions� UE class 3
� qualMeas = qualMeasEcno
� qQualmin (Serving and Neighboring Cell 3G) = - 16 dB
� qRxLevMin (Serving and Neighboring Cell 3G) = - 115 dBm
� qRxLevMin (Neighboring Cell 2G) = - 104 dBm
� sibMaxAllowedUlTxPowerOnRach = 24 dBm
� maxAllowedUlTxPower (Neighboring Cell 3G) = 24 dBm
� maxAllowedUlTxPower (Neighboring Cell 2G) = 33 dBm• sIntraSearch = 8dB
• sInterSearch = 6dB
• sSearchRatGSM = 4dB
• sSearchHcs = 0dB• sHcsRatGsm = 0dB
� isHcsUsed = True• sLimitSearchRat = 4dB• temporaryOffest = parameters not used
� Question 1: which is the cell reselected by the UE if in High Mobility ?
� Question 2: which is the cell reselected by the UE if in Low Mobility ?
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6 Cell reselection in non-DCH Connected Mode
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6 Cell reselection in non-DCH Connected Mode
6.1 SIB 4 and SIB 12 Broadcast
SIB 4: Se
rving Ce
ll
re-selection p
arame
ters broa
dcast
isDynamicSibAlgoWithSbAllowed(RadioAccessService)
SIB11+
DCHDCH
SIB11+
DCH
DCH
DCH
DCH
SIB11+
DCH SIB11+
DCH
SIB11+
DCH
DCH
DCH
DCH
SIB11+
DCHDCH
SIB11+
DCH
SIB11+
DCH
SIB11+
DCHDCH
DCH
DCHDCH
DCH
SIB11+
DCH
ServingFDDCell
DCH
SIB11+
DCH
DCH
DCH
SIB11+
DCHDCH
DCH
Cell_FACHCell_PCHURA_PCH
SIB 12
: Neig
hboring
Cells
re-se
lection p
arame
ters broadcast
sib4Enable (FDDCell)sib12Enable (FDDCell)
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6 Cell reselection in non-DCH Connected Mode
6.2 Sib3 / Sib 11 Parameters & Objects
UmtsNeighbouring
UmtsNeighbouringRelation
CellSelectionInfo
RNC
NodeB
FddCell
FachMeasOccasionInfo
CrMgt
HcsCellParam
UmtsFddNeighbouringCell
UmtsNeighbouringHcsTemporaryOffsets
UmtsNeighbouringHcsCellParam
New objects
Existing related parameters
cellAccessrestriction
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6 Cell reselection in non-DCH Connected Mode
6.3 SIB4 Parameters & Objects
CellSelectionInfoConnectedMode
NodeB
FddCell
New objects
Existing related parameters
FachMeasOccasionInfo
CrMgt
HcsCellParam
cellSelectReselectInfoPchFach
cellAccessRestrictionConnectedMode
tReselectionqHyst1qHyst2
R’99/R4 UEs
R5/R6 UEs
tReselectionPchtReselectionFach
qHyst1PchqHyst1FachqHyst2PchqHyst2Fach
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6 Cell reselection in non-DCH Connected Mode
6.4 SIB 12 Parameters & Objects – UMTS FDD Neighbor
FddNeighCellSelectionInfoConnectedMode
UmtsNeighbouringRelation
UmtsNeighbouring
RNC
NodeB
Fddcell
UmtsFddNeighbouringCell
UmtsNeighbouringHcsTemporaryOffsets
UmtsNeighbouringHcsCellParam
New objects
Existing related parameters
qQualMin
qRxlevMin
qOffset1sn
qOffset2sn
maxAllowedUlTxPower
hcsPrio
qHcs
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6 Cell reselection in non-DCH Connected Mode
6.5 SIB 12 Parameters & Objects – GSM Neighbor
GsmCellSelectionInfoConnMode
GSMCell
GSMNeighbour
RNC
NodeB
Fddcell
GsmNeighbouringCell
GsmHcsTemporaryOffsets
GsmgHcsCellParam
New objects
Existing related parameters
qRxlevMin
qOffset1sn
hcsPrio
qHcs
GSMCellCellSelectionInfoCMForGsmCell
maxAllowedUlTxPower
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Exercise
� By Respecting the flowing strategy fill in tables in next pages with the
appropriate values for the Mono, Bi and Tri Layer Topologies:
� Assuming qQualMin = -16 dB And event2D for 3G-2G HHO = -14 dB
� When UE is in Idle mode, we want it to select the most suitable cell:
� Small hysteresis between cells
� Fast reactivity
� When UE is in Cell_FACH or Cell_PCH state, we prefer it to stay on its current
layer (in accordance to InterFreq or InterRAT HHO setting), even if increasing
the risk of call drop:
� Larger hysteresis to prevent Ping-Pong in cell reselection (intra frequency)
� Lower threshold to delay the triggering inter freq or inter system measurements
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Exercise1: Mono-Layer Topology
� Neighbouring Definition:
3G
2G
3G 3G
sSearchRatGsmNo 2G reselection until criteria
for HHO is reached
Objective
2dB
Connected ModeIdle Mode
Only Sib4 is used
qHyst2Prevent ping pong between cells on connected mode
Objective
2 dB
Connected ModeIdle Mode
Objective is to prevent UE to go in 2G while staying in FACH-PCH State:
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Exercise2: Bi-Layer Topology
3G (R99)
2G
3G (HSxPA)
3G (R99)
3G (HSxPA)
3G (R99)
3G (HSxPA)Only Sib4 is used
Same setting for SIB4 on both 3G layer
The objectives are to delay the inter-freq mobility and to prevent the UE to go on 2G while in FACH-PCH State
Give two values for SInterSearch when InterFreq or inter-Rat is preferred in the iMCTAsetting
No 2G reselection, first fallback to interfreq reselection
2 dBsSearchRatGsm
sInterSearch
qHyst2
Will depends on iMCTA Alarm priority setting
Prevent ping pong between cells on connected mode
Objective
6 dB
2 dBConnected ModeIdle Mode
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Exercise2: Bi-Layer Topology [cont.]
No 2G reselection, first fallback to interfreq reselection
2 dBsSearchRatGsm
sInterSearch
qHyst2
F1 F2 reselection allowed for load sharing
Prevent ping pong between cells on connected mode
Objective
6 dB
2 dB
Connected ModeIdle Mode
• F1 & F2 settings
3G (HSDPA)
2G
3G (HSxPA)
3G (HSDPA)
3G (HSxPA)
3G (HSDPA)
3G (HSxPA)
Only Sib4 is used
The objectives are to delay the inter-freq mobility and to prevent the UE to go on 2G
while in FACH-PCH State
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Exercise3: Tri-Layer Topology
3G (R99)
2G
3G (HSxPA)
3G (R99)
3G (HSxPA)
3G (R99)
3G (R99)
3G (HSxPA)
3G (R99)
3G (R99)
3G (HSxPA)
Because of load sharing between F1 & F3 (R99 cells), the strategy is to allow the UE to select the best cell (intra + inter-frequency F1+F3) in idle mode.
For connected mode (PCH / FACH), the strategy consists in keeping the UE on its current layer, except for R99: with load sharing purpose, it is accepted that the UE goes from F1 to F3 (and F3 to F1), but not on F2
F1
F2
F3
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Exercise3: Tri-Layer Topology [cont.]
No 2G reselection, first fallback to interfreq reselection
2 dBsSearchRatGsm
sInterSearch
qHyst2
F1 F3 reselection allowed for load sharing
Prevent ping pong between cells on connected mode
Objective
6 dB
2 dB
Connected ModeIdle Mode
• F1 & F3 settings
No 2G reselection, first fallback to inter-freq reselection
2 dBsSearchRatGsm
sInterSearch
qHyst2
To delay the inter-freq mobility
Prevent ping pong between cells on connected mode
Objective
6 dB
2 dBConnected ModeIdle Mode
•F2 settings
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Exercise3: Tri-Layer Topology [cont.]
� Purpose of SIB 12 is to disadvantage F2 compared to F1 & F3 for Cell reselection
� For which frequency (or frequencies) SIB12 will should be activated?
Disadvantage F2 compared to F1 & F3
0 dBqOffset2sn
F2
qOffset2sn
F1 & F3
Objective
0 dB
Connected ModeIdle Mode
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7 Cell Status and Reservation
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7 Cell Status and Reservation
7.1 Cell Status and Reservation Process
barred
notReservedallowed notAllowed
only UE withAccess Classes 11 / 15
are accepted
reserved
try to selecta cell of anotherfrequency
if no other cell
all UE Access Classesare accepted
notReservedreserved
other UE
barredOrNot (FDDCell) = ..?
intraFreqCellReselectInd (FDDCell) = ..? cellReservedForOperatorUse (FDDCell) = ..?
cellReservationExtension (FDDCell) = ..?
try to reselectsame cell
wait tBarred (FDDCell)
notBarred
try to selectanother cell of the samefrequency
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8 Location Registration
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8 Location Registration
8.1 LAC/RAC/SAC
LAC 2
RAC 1
RAC 2
SAC 1
SAC 2
LAC 1
RNClocationAreaCode (FDDCell)
routingAreaCode (FDDCell)
serviceAreaCode (FDDCell)
Core Network Domains
Sac (FDDCell->CBSResource)
Broadcast Domain
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Module Summary
� This lesson covered the following topics:
� PLMN selection and associated parameters
� Cell selection and associated parameters
� Cell reselection and associated parameters
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Self-assessment on the Objectives
� Please be reminded to fill in the formSelf-Assessment on the Objectivesfor this module
� The form can be found in the first partof this course documentation
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End of ModuleModule 1