4G-3G-2G Layering Strategy
Telkomsel
November, 2015
General Strategy
6
LTE 1800 has highest priority in layering. All UE with
supported LTE band will be pushed to camped in LTE
layer. Voice Service in LTE will be served by CSFB to
UMTS layer. Data Service can be handover to UMTS
after LTE out of coverage with good end user experience
in DC HSDPA.
LTE 1800
4
F3: HSPA + R99
4
F2: HSPA + R99
3
F1: HSPA + R99
2
U900 : HSPA+R99
1
DCS1800
1
GSM900
UMTS2100 and UMTS900 are configured with total 4
carriers on co-lo sector. Traffic in all carriers will be
balancing with Call setup re-direction via MBLB. Main
capacity layer in UMTS is UMTS2100, while UMTS900
will be used for blanket coverage layer. UMTS2100 (F1)
will be used for priority layer as CSFB from LTE. If U900
has become seamless coverage, CSFB from LTE will use
U900 as highest priority.
Spectrum re-farming on DCS1800 to introduce LTE. Aim
to keep traffic in 3G as much as possible due to the
reduction on 2G bandwidth. GSM900 can uses EGSM
frequency after these spectrum clear from other
operator ‘s interference.
LTE
Idle Mode Layering Strategy
6
6
LTE
LTE 1800
1800
LTE
LTE 1800
1800
6
6
sIntrasearch = 62dB
qrxlevminintraF =
-130dBm
qHyst=3dB
AdjLQrxlevminEUTRA =-116dBm
AdjLThreshigh
= 2 dB
4
4
F3=
F3= HSDPA
HSDPA +
+ R99
R99
WCDMA 900/2100
AdjiQqualMin = -100 dB
AdjiQrxlevMin = -14 dB
AdjiQoffset1 = 0 dB
AdjiQoffset2 = 0 dB
4
4
3
3
1
1
Fddqmin = 7 (EcNo12dB)
qSearchI
= 7 (Infinity
1
1
(always))
F1=
F1= HSDPA
HSDPA +
+ R99
R99
4
4
F2=
F2= HSDPA
HSDPA +
+ R99
R99
Interfrequency Meas=
-10dB
Sintersearch = 4 (8dB)
Inter-RAT Meas=
-14dB
SsearchRAT= 2
DCS1800
(4dB) DCS1800
Inter-RAT Meas=
-14dB
SsearchRAT= 2
(4dB)
F1=
F1= HSDPA
HSDPA +
+ R99
R99
3
3
Interfrequency
Meas= -10dB
Sintersearch = 4 (8dB)
Interfrequency
Meas= -2dB
Sintersearch = 6
(12dB)
4
4
Intrafrequency Meas =
-8dB
Sintrasearch = 5 (10dB)
Interfrequency Meas=
-10dB
Sintersearch = 4 (8dB)
AdjiQqualMin = -115 dB
AdjiQrxlevMin = -18 dB
AdjiQoffset1 = -10 dB
AdjiQoffset2 = -10 dB
2
2
GSM/DCS
F2=
F2= HSDPA
HSDPA +
+ R99
R99
RSRP LTE > -114
dBm
F3=
F3= HSDPA
HSDPA +
+ R99
R99
4
4
U900
U900
4
4
Intrafrequency Meas =
-8dB
Sintrasearch = 5 (10dB)
3
3
2
2
1
1
QrxlevMin= -130
dBm
sNonIntrsearch = 16dB
threshSrvLow = 14dB RSRP LTE < -116 dBm
utraFrqThrL
= 0 dB
&
qRxLevMinUtra =
RSCP WCDMA > -115
-115dBm
qQualMinUtra = -18 dB dBm & Ec/No WCDMA
tResUtra
=2s
> -18 dB
QqualMin = -18 ( -18
F3=
F3= HSDPA
HSDPA +
+ R99
R99 dB)
QrxlevMin= -58 ( -115
dBm)
F2=
F2= HSDPA
HSDPA +
+ R99
R99
F1=
F1= HSDPA
HSDPA +
+ R99
R99
Intrafrequency Meas =
-8dB
Sintrasearch = 5 (10dB)
QqualMin = -18 ( -18
dB)
QrxlevMin= -58 ( -115
dBm)
QqualMin = -18 ( -18
dB)
QrxlevMin= -58 ( -115
dBm)
QqualMin = -18 ( -18
dB)
QrxlevMin= -58 ( -115
sNonIntrsearch = 16dB
threshSrvLow
= 14dB RSRPdBm)
LTE < -116 dBm &
gerFrqThrL
= 6dB RxLev GSM> -105 dBm
qRxLevMinGer = -105
dBm
RxLev AccMin =
tResGer
= 2s
DCS1800
DCS1800
-95dBm
U900
U900
Intrafrequency Meas =
-8dB
Sintrasearch = 5 (10dB)
DCS
DCS 1800
1800
GSM900
GSM900
LTE
LTE 1800
1800
1
1
hoTLDLRxLevel : -104dBm
HOMarginPBGT= 6dB
1
1
hoTLDLRxLevel =
-95dBm
HOMarginPBGT= 4dB
GSM900
GSM900
RxLev AccMin = -105
dBm
LTE
Voice Dedicated Mode Layering Strategy
6
6
LTE
LTE 1800
1800
6
6
LTE
LTE 1800
1800
LTE
LTE 1800
1800
RAN 2717 Smart LTE
Layering
SmartLTELayeringRSCP = -95
dBm
GSM/DCS
WCDMA 900/2100
4
4
F3=
F3= HSDPA
HSDPA +
+ R99
R99
4
4
F3=
F3= HSDPA
HSDPA +
+ R99
R99
4
4
HHoRscpThreshold =
AdditionWindow = 4dB
-105 dBm
AdditionTime = 320 ms
HHoRscpCancel = -102
DropWindow = 6 dB
dBm
DropTime = 640 ms
HHoEcNoThreshold = -14
dB
HHoEcNoCancel = -12
4
4
4
4
F2=
F2=
4
4
F2= HSDPA
HSDPA +
+ R99
R99
F2= HSDPA
HSDPA +
+ R99
R99
dB
HHoRscpThreshold = : 1
IFHOcauseCPICHEcNo
AdditionWindow = 4dB
-105 dBm
IFHOcauseCPICHrscp
:1
AdditionTime = 320 ms
HHoRscpCancel = -102
DropWindow = 6 dB
dBm
DropTime = 640 ms
HHoEcNoThreshold =-14
dB
HHoEcNoCancel
= -12
3
3
F1=
3
F1=
3
3
F1= HSDPA
HSDPA: 1+
+ R99
R99
3
F1= HSDPA
HSDPA +
+ R99
R99
IFHOcauseCPICHEcNo
HHoRscpThreshold
= :1
AdditionWindow = 4dB
HHoRscpThreshold =
IFHOcauseCPICHrscp
-105 dBm
AdditionTime = 320 ms
-105 dBm
HHoRscpCancel = -102
DropWindow = 6 dB
HHoRscpCancel = -102
dBm
DropTime = 640 ms
dBm
HHoEcNoThreshold = -14
HHoEcNoThreshold = -14
dB
dB
2
2 -12
HHoEcNoCancel =
HHoEcNoCancel = -12
2
2
U900
U900
dB
dB
IFHOcauseCPICHEcNo
IFHOcauseCPICHEcNo
:1
HHoRscpThreshold
=
AdditionWindow = 4dB : 1
IFHOcauseCPICHrscp
-105 dBm IFHOcauseCPICHrscp : 1
AdditionTime
= 320 ms: 1
HO MARGIN PBGT = 4-6 dB
HHoRscpCancel = -102
DropWindow = 6 dB
HO MARGIN LEV = 6 dB
dBm
DropTime = 640 ms
HO MARGIN QUAL = 3
HHoEcNoThreshold = -14
RX LEV MIN CELL = -100 until
dB
-97 dBm
HHoEcNoCancel
= -12
1
1
1
DCS1800
1
DCS
1800
1
1
DCS1800
DCS 1800
dB
HHoRscpThreshold
=
GSMcauseCPICHEcNo : 1
-105
dBm
GSMcauseCPICHrscp
:1
HO MARGIN PBGT = 4-6 dB
minEcnoThreshold = 24 (- HHoRscpCancel = -102
HO MARGIN LEV = 6 dB
dBm
12 dB)
HO MARGIN QUAL = 3
HHoEcNoThreshold = -14
qSearchC
=
7
(Infinity
1
RX LEV MIN CELL = -100 until
1
dB
(always))
-97 dBm
HHoEcNoCancel = -12 dB
1
GSM900
1
GSM900
GSMcauseCPICHEcNo : 1
GSMcauseCPICHrscp : 1
CSFB is only via Redirection
actCSFBRedir : 1
actCsfbPsHoToUtra :0
Threshold4 = 24 (-116 dBm)
csFallBPrio : 1 (F1), 2(F2), 3(F3),
4(U900)
F3=
F3= HSDPA
HSDPA +
+ R99
R99
F2=
F2= HSDPA
HSDPA +
+ R99
R99
F1=
F1= HSDPA
HSDPA +
+ R99
R99
U900
U900
DCS1800
DCS1800
GSM900
GSM900
LTE
Data Dedicated Mode Layering Strategy
6
6
LTE
LTE 1800
1800
A5 Coverage Handover
A3 Better Cell Handover:
threshold3 = 28 ( -112 dBm )
a3Offset = 6 (3 dB)
threshold3a = 29 ( -111 dBm)
a3TimeToTrigger = 8 (320 ms)
a5TimeToTrigger = 8 (320 ms)
a3ReportInterval = 3 (640 ms)
a5ReportInterval = 3 (640 ms)
WCDMA 900/2100
4
4
4
4
3
3
GSM/DCS
2
2
1
1
Fddqmin = 7 (EcNo12dB)
qSearchP = 7 (Infinity
1
1
(always))
F3=
F3= HSDPA
HSDPA +
+ R99
R99
4
4
LTE
LTE 1800
1800
LTE
LTE 1800
1800
6
6
F3=
F3= HSDPA
HSDPA +
+ R99
R99
RU50 Feature
RAN2264: Smart LTE Handover
4
4
HHoRscpThreshold =
AdditionWindow = 0 dB
-110 dBm
AdditionTime = 1280 ms
HHoRscpCancel = -107
DropWindow = 4 dB
dBm
DropTime = 640 ms
HHoEcNoThreshold = -18
dB
HHoEcNoCancel = -16
4
4
4
F2=
F2=
4
F2= HSDPA
HSDPA +
+ R99
R99
F2= HSDPA
HSDPA +
+ R99
R99
dB
IFHOcauseCPICHEcNo
HHoRscpThreshold
= :1
AdditionWindow = 0 dB
IFHOcauseCPICHrscp
:1
-110
dBm
AdditionTime = 1280 ms
HHoRscpCancel = -107
DropWindow = 4 dB
dBm
DropTime = 640 ms
HHoEcNoThreshold = -18
dB
HHoEcNoCancel
= -16
3
F1=
3
F1=
3
F1= HSDPA
HSDPA +
+ R99
R99
3
F1= HSDPA
HSDPA +
+ R99
R99
dB
HHoRscpThreshold
=
HHoRscpThreshold =
IFHOcauseCPICHEcNo
:1
AdditionWindow = 0 dB
-110
dBm
-110 dBm
IFHOcauseCPICHrscp
:1
AdditionTime = 1280 ms
HHoRscpCancel = -107
HHoRscpCancel = -107
DropWindow = 4 dB
dBm
dBm
DropTime = 640 ms
HHoEcNoThreshold = -18
HHoEcNoThreshold = -18
dB
dB
2 -16
HHoEcNoCancel =
HHoEcNoCancel = -16
2
U900
U900
dB
dB
IFHOcauseCPICHEcNo
IFHOcauseCPICHEcNo
:1
HHoRscpThreshold
=
AdditionWindow = 0 dB: 1
IFHOcauseCPICHrscp
:1
-110 dBm IFHOcauseCPICHrscp : 1
AdditionTime
= 1280 ms
HO MARGIN PBGT = 4-6 dB
HHoRscpCancel = -107
DropWindow = 4 dB
HO MARGIN LEV = 6 dB
dBm
DropTime = 640 ms
HO MARGIN QUAL = 3
HHoEcNoThreshold = -18
RX LEV MIN CELL = -100 until
dB
-97 dBm
HHoEcNoCancel
= -16
1
1
DCS1800
1
DCS
1800
1
DCS1800
DCS 1800
dB
HHoRscpThreshold
=
GSMcauseCPICHEcNo : 0
-110
dBm
GSMcauseCPICHrscp
:0
HO MARGIN PBGT = 4-6 dB
HHoRscpCancel = -107
HO MARGIN LEV = 6 dB
dBm
HO MARGIN QUAL = 3
HHoEcNoThreshold = -18
1
1
RX LEV MIN CELL = -100
until
dB
-97 dBm
HHoEcNoCancel = -16
GSM900
GSM900
dB
GSMcauseCPICHEcNo : 0
GSMcauseCPICHrscp : 0
PS data via PS Handover
threshold2Wcdma = 28 (-112 dbm)
threshold2a = 45 ( -95 dBm)
b2Threshold1Utra = 26 ( -114 dBm )
b2Threshold2UtraEcn0=24(-12 dB) for U21 & 9 dB
for U9
b2Threshold2UtraRscp=10(-105 dBm) for U21 & -95
dBm
forHSDPA
U9
F3=
+
F3=
HSDPA
+ R99
R99
b2TimeToTriggerUtraMeas = 9 (480 ms)
PS data via Redirection
Threshold4 = 24 (-116 dBm)
redirectPrio: 1 (F1), 2(F2), 3(F3), (U900)
F2=
F2= HSDPA
HSDPA +
+ R99
R99
F1=
F1= HSDPA
HSDPA +
+ R99
R99
U900
U900
DCS1800
DCS1800
GSM900
GSM900
Neighboring Strategy
4
4
4
4
3
3
PS
HO
ANR
CS
Redirect
1 2 3 4
1 2 3 4
REDRT: U2100 F1 > U2100 F2 > U2100 F3 >
U900
U2100 F3 > U2100 F2 > U2100 F1>U900
(Cell Pair)
6
6
LTE
LTE 1800
1800
LTE 1800
Freq
PS
HO
ANR
ANR
ANR
LTE
LTE 1800
1800
LTE
LTE 1800
1800
6
6
PS
HO
F3:
F3: HSDPA
HSDPA +
+ R99
R99
4
4
F3:
F3: HSDPA
HSDPA +
+ R99
R99
4
4
F3:
F3: HSDPA
HSDPA +
+ R99
R99
F2:
F2: HSDPA
HSDPA +
+ R99
R99
4
4
F2:
F2: HSDPA
HSDPA +
+ R99
R99
4
4
F2:
F2: HSDPA
HSDPA +
+ R99
R99
F1:
F1: HSDPA
HSDPA +
+ R99
R99
3
3
F1:
F1: HSDPA
HSDPA +
+ R99
R99
3
3
F1:
F1: HSDPA
HSDPA +
+ R99
R99
ADJI
co-sector
2
2
ADJI
co-sector
U900
U900
IntraFrequency
ADJG
U900
U900
2
2
ADJI
ADJW
ADJL (Freq)
ADJG /ADJW
co-sector
1
1
DCS1800
DCS1800
1
1
ANR – Automatic Neighbour Relations
1
1
DCS
DCS 1800
1800
GSM900
GSM900
PSHO (Target Cell)
1
1
ADJG /ADJW
co-sector
1
1
REDRT (UARFCN)
DCS1800
DCS1800
1
1
GSM900
GSM900
1
1
Redirect
Priority
Abs Priority
LTE Layering Strategy – Mobility Feature - WCDMA
(RU20 OnTop) RAN2067=
reselection
(RL10) LTE 762= reselection
LTE 562= CSFB redirect
LTE 423= redirect
(RU50) RAN 2264= Smart LTE handover
& (RL50) LTE 57= Inter RAT handover from
UTRAN
rt
ma
S
7=
71
2
N
(R
RA
L1
0) ring
0)
4
e
LT
(R
(RU lay
E4
L4
E
(R
0)
23
op)
LT
L2
=r
LT
OnT n
0)
0
2
E
ed
LT
(RU electio
me 107
ire
E5
res
3
c
a
su = r
t
62
67=
0
2
e
=C
rem d
RAN
SF
en irect
B
ts
wi
red
th
ire
ct
UTRA_IDLE
RAN 2717= Smart LTE layering
(RU20 OnTop) RAN2176= LTE
PS HO
PCH/URA_
PCH
(RL30) LTE 56= IRAT HO WCDMA
CELL_
FACH
E-UTRA
RRC_CONNECTED
(RL20) LTE 562= CSFB
(RL40) LTE 736= CSFB via IRAT HO
Cell_DCH
E-UTRA
RRC_IDLE
(RL40) LTE 736=
CSFB via IRAT HO
(RU40) RAN2435= SRVCC
from LTE and CSFB with HO
LTE 1073= redirect w. meas.
(RL40/RU40) LTE 872= SRVCC
LTE Layering Strategy – Mobility Feature - GSM
(RL40) LTE 873= SRVCC
GSM Connected
LTE 562= CSFB redirect
LTE 442= eNACC w/o RIM
LTE 423= redirect & LTE984
GSM Idle
GPRS Packet Idle
(RL10) LTE 762= reselection
GPRS Packet
Transfer
(RL20) LTE 562= CSFB redirect
E-UTRA RRC_CONNECTED
(R
L1
0)
(R
LT
L3
E4
0)
23
LT
(R
=r
E4
L2
ed
42
0)
ire
=e
LT
ct
E
NA
&
56
C
(R
2=
C
L4
w/
CS
0)
oR
LT
FB
I
E9
M
re
84
dir
w.
ec
t&
sy
ste
(R
m
L4
inf
0)
=
7
3
7
1
o
L
0
G3
TE
R
)
0
3
E
9
T
(RG
L
84
R for
w.
IS-NCC
sy
ste
m
inf
(RG20) BSS21353= reselection
o
E-UTRA
RRC_IDLE
LTE Layering Strategy – Idle Mode Mobility
•
Abs Priority
6
Better RSRP
LTE1800
LTE1800
•
Abs Priority
6
Abs Priority
4
F3
10613
F3
10613
•
Abs Priority
4
•
Abs Priority
4
F2
10638
F2
10638
•
Abs Priority
4
•
Abs Priority
3
F1
10663
F1
10663
•
Abs Priority
3
•
Abs Priority
2
U900
•
Abs Priority
2
G1800
G1800
•
Abs Priority
1
G900
G900
•
Abs Priority
1
e
Co
ve
rag
rL
TE
Po
o
e
Abs Priority
1
g
ra
ve
Co
•
Abs Priority
1
E
LT
•
U900
gh
ou
En
•
This layering will impact to UE Rel 8 onward (support eUTRA also WCDMA 2100 and GSM
900/1800)
Idle Mode – LTE to WCDMA and GSM
LTE1800
•
Abs Priority
6
•
Abs Priority
4
F3
10613
•
Abs Priority
4
F2
10638
Abs Priority
3
F1
10663
•
U900
•
Abs Priority
2
•
Abs Priority
1
G1800
•
Abs Priority
1
G900
Cell Reselection from LTE to
WCDMA (F1,F2,F3, U900)
only if :
RSRP LTE < -116 dBm
and
RSCP WCDMA > -115 dBm
and
Ec/No WCDMA > -18 dB
Note = Ranking of cells if meet
criteria based on RSCP with same
priority
Cell Reselection from LTE to
GSM (900/1800) only if =
RSRP LTE < -116 dBm
and
RxLev GSM> -105 dBm
Idle Mode – WCDMA to LTE and GSM
Cell Reselection from WCDMA
(F1,F2,F3,U900) to LTE if :
Abs Priority
6
LTE1800
•
Abs Priority
4
F3
10613
•
Abs Priority
4
F2
10638
•
Abs Priority
3
F1
10663
Cell Reselection from WCDMA
(F1,F2,F3,U900) to GSM
(900/1800) still use legacy
method =
•
Abs Priority
2
U900
Ec/No < -14 dB to measure
GSM
•
Abs Priority
1
G1800
•
Abs Priority
1
•
G900
RSRP LTE > -114 dBm
Note = Ranking of cells if meet
criteria based on RSRP with same
priority
RSCP meas + QHyst1
< RxLev meas - AdjgQoffset1,
whereas
RxLev meas > AdjgQrxlevMin
Idle Mode – GSM to LTE and WCDMA
Abs Priority
6
LTE1800
•
Abs Priority
4
F3
10613
•
Abs Priority
4
F2
10638
•
F1
10663
•
Abs Priority
3
•
Abs Priority
2
U900
•
Abs Priority
1
G1800
•
Abs Priority
1
G900
Cell Reselection from GSM
(900/1800) to LTE if :
RSRP LTE > -114 dBm
Note = Ranking of cells if meet
criteria based on RSRP with same
priority
Cell Reselection from GSM
(900/1800) to WCDMA
(F1,F2,F3,U900) if :
EcNo > 12 dB
Note = Ranking of cells if meet
criteria based on RSCP with same
priority
Idle Mode
UE Switch On
Abs Priority 6
UMTS 2100-900
•
Always meas
LTE (SIB19)
Abs Priority 2-4
GSM Reselect L1800 if
L1800 RSRP > -114
dBm
GSM-DCS
•
Legacy Method
Select L1800 if
L1800 RSRP > -130 dBm
L1800
•
New Method
Abs Priority 1
Always meas UMTS
and LTE
UMTS Reselect L1800
if
L1800 RSRP > -114
dBm
Start Measure Inter Freq /
RAT if
L1800 RSRP < -114 dBm
UMTS Reselect GSM if
ECNO UMTS < -14 dB
and
UMTS RSCP < GSM
RxLev
GSM Reselect UMTS if
UMTS ECNO > -12 dB
LTE Reselect UMTS if
L1800 RSRP < -116 dBm and
UMTS RSCP > -115 dBm and
UMTS ECNO > -18dB
LTE Reselect GSM if
L1800 RSRP < -116 dBm and
RxLev > -105 dBm
LTE Layering Strategy – Connected Mode Mobility (PS Triggered)
LTE1800
Better Cell / Coverage HO
LTE1800
F3
10613
F3
10613
•
redirectPrio
3
•
redirectPrio
2
F2
10638
F2
10638
•
redirectPrio
2
•
redirectPrio
1
F1
10663
F1
10663
•
redirectPrio
1
•
redirectPrio
4
U900
•
redirectPrio
4
G1800
G1800
•
redirectPrio
5
G900
G900
U900
Po
or
wit LTE
h
C
Re PS ove
dir HO rag
ec
tio or e
n
redirectPrio
3
ge
ra
ve
Co /
E de H
LT Mo PC
gh le A
ou n Id UR
En i ell_
C
•
This layering will impact to UE Rel 8 onward (support eUTRA also WCDMA 2100 and GSM
900/1800)
Connected Mode – via PS HO or Redirection (PS Triggered)
LTE1800
LTE will start meas WCDMA (F1,
F2,F3,U900) if
RSRP LTE < -112 dBm (event A2)
•
redirectPrio
3
F3
10613
•
redirectPrio
2
F2
10638
•
redirectPrio
1
F1
10663
For UE not support PS HO (FGI bit 8 =0)
will redirect with measurement.
•
redirectPrio
4
U900
Note
Note =
= Ranking
Ranking of
of cells
cells if
if meet
meet criteria
criteria based
based
on
on strongest
strongest measurement
measurement not
not redirectPrio
redirectPrio
G1800
G900
Handover from LTE to WCDMA
(F1,F2,F3,U900) only if =
RSRP LTE < -114 dBm
and
Ec/No WCDMA > -12 dB (U2100)
or -9 dB (U900)
LTE Layering Strategy – CSFB Scenario (CS Triggered)
LTE1800
Better Cell / Coverage HO
LTE1800
F3
10613
F3
10613
•
redirectPrio
3
•
redirectPrio
2
F2
10638
F2
10638
•
redirectPrio
2
•
redirectPrio
1
F1
10663
F1
10663
•
redirectPrio
1
•
redirectPrio
4
U900
•
redirectPrio
4
U900
CS
F
or B wi
Re t h
dir PS
ec
tio HO
n
redirectPrio
3
ge
ra
ve
Co /
E de H
LT Mo PC
gh le A
ou n Id UR
En i ell_
C
•
G1800
G1800
G900
G900
This layering will impact to UE Rel 8 onward (support eUTRA also WCDMA 2100 and GSM
900/1800)
CSFB Scenario – via Redirection (CS Triggered)
LTE1800
•
csFallBPrio
3
F3
10613
•
csFallBPrio
2
F2
10638
•
csFallBPrio
1
F1
10663
•
csFallBPrio
4
U900
G1800
G900
LTE will have CSFB via Redirection to
WCDMA (F1,F2,F3, U900) if :
RSRP LTE1800 < -116 dBm
Dedicated Mode Layering –
PS Triggered
L1800 FDD
•
Abs Priority 6
Reselect L1800 if
L1800 RSRP > -114 dBm
Only when UMTS in
URA/CELL – PCH / Idle
Mode
UMTS 2100-900
•
Always meas
LTE (SIB19)
Abs Priority 2-4
HO to UMTS when
Ec/No > -12
GSM
•
Abs Priority 1
Start Measure UMTS
if L1800 RSRP < -112
dBm
HO to UMTS via PS Handover (using
EcNo)
L1800 RSRP < -114 dBm and UMTS
EcNo > -12 dB (U2100) or -9 dB (U900),
if UE not support PSHO using redirection
with meas
GSM Reselect L1800 if
L1800 RSRP > -114 dBm
Always meas UMTS
and LTE
Start Compressed Mode
(RT) if UMTS
RSCP < -105
or Ec/No < -14
(NRT/HSDPA)
RSCP < -110
or Ec/No < -18
Redirection to UMTS
L1800 RSRP < -116 dBm
Redirection to GSM
L1800 RSRP < -116 dBm
CSFB Mode Layering –
CS Triggered
L1800 FDD
•
Abs Priority 6
Reselect L1800 if
L1800 RSRP > -114 dBm
Only when UMTS in
URA/CELL – PCH / Idle
Mode
UMTS 2100-900
•
Always meas
LTE (SIB19)
Abs Priority 2-4
GSM Reselect L1800 if
L1800 RSRP > -114 dBm
GSM
•
CSFB to UMTS via Redirection only
L1800 RSRP < -116 dBm
Abs Priority 1
Always meas UMTS
and LTE
CSFB to GSM via
Redirection
Traffic Distribution 3G U2100-U900

General Design
 Existing U2100 consist of 3 carrier with mixed voice and data service ( HS+R99) for each carrier
 U900 will be used as similar service layer as U2100 with mixed voice and data service (HS+R99)
U2100_F3
HS+R99
U2100_F2
HS+R99
U2100_F1

HS+R99
U2100_F3
HS+R99
U2100_F2
HS+R99
U2100_F1
HS+R99
HS+R99
U900
Traffic Balancing Solution
 If U900 device penetration is relatively high, traffic should be carefully balanced in order to prevent congestion of the layer
 Traffic management can be applied in both Idle and Connected Mode states
State
Traffic Management Solution
Mechanism
Idle Mode
Power Offset Measurement
Cell Reselection
Call Setup (Transition to
Cell_DCH )
* Multi Band Load Balancing
* Directed RRC Connection Setup
* HS Layering Common Channel
Redirection
Dedicated Mode (Cell_DCH)
*
*
*
*
HS Capability Based Handover
Load and Service Based Handover (if needed)
Inter Frequency Handover
Inter System Handover
Handover
Traffic Balancing 3G U2100-U900 via Power Offset and MBLB
U2100 Cell Edge (MBLB Border)
UE Camp on U900
UE Camp on U2100/U900
Capacity
U900
U900: HSDPA + R99
Sintersearch
Sintrasearch
5 (10 dB)
5 (10 dB)
SsearchRat
2 (2dB)
2 (2dB)
SintersearchCon
4 (8dB)
4 (8dB)
SintrasearchCon
5 (10 dB)
5 (10 dB)
2 (2dB)
2 (2dB)
1 (1s)
1 (1s)
TreselectionFACH
10 (2s)
10 (2s)
TreselectionPCH
2 (2s)
2 (2s)
1 (2dB)
1 (2dB)
U2100 (F1,
F2,F3)
-18dB
Qqualmin
Qrxlevmin
MBLB
(Co-Sector)
ADJI
QOffset:
0-10 dB
Idle/Connected Mode
U2100 (F1,
U900
F2,F3)
-18
-18
-58 (-58 (-115dBm)
115dBm)
6 (12dB)
4 (8dB)
Parameter Name
Coverage
ADJI
QOffset:
0 dB
F3: HSDPA + R99
SsearchRatCon
Treselection
U2100
F2: HSDPA + R99
Qhyst2
HOPI
AdjiQqualMin
F1: HSDPA + R99
AdjiQrxlevMin
ADJS
ADJG
ADJI
HS CAHO
GSM/DCS
2G
ADJW
BLND HO
U900
-14dB
-51 (101dBm)
AdjiQoffset1
-10 dB
AdjiQoffset2
-10 dB
BlindHORSCPThr
-85dBm
RACHIntraFreqMesQuant = RSCP
-58 (-115dBm)
0 dB
0 dB
-95dBm
Power Offset Measurement in Idle Mode
• U2100 -> U900 cell reselection
 Interfrequency measurement is delayed until Ec/No < -14 dB (Qqualmin=-18 dB,
Sintersearch=4 dB, Qrxlevmin=-115 dBm)
 AdjiQoffset1 and AdjiQoffset2=0 since U900 is stronger
 AdjiQrxlevmin=-101 dBm to prevent reselecting to U900 cell with good Ec/No but poor RSCP
• U900 -> U2100 cell reselection
 Interfrequency measurement is triggered early at Ec/No < -6 dB (Qqualmin=-18 dB,
Sintersearch=12 dB)
 Measurement offset is used to favor U2100 (AdjiQoffset1 and AdjiQoffset2 = -10 dB)
 Min quality is used to ensure target cell quality and to avoid pingpong at the edge of U2100
coverage (AdjiQqualmin = -18 dB, AdjiQrxlevmin = -115 dBm)
Redirection via Multi Band Load Balancing
•
The Multi-Band Load Balancing (MBLB) feature includes 4 components:
• Redirection during RAB setup:
– either first RAB, or AMR RAB for a UE which already has an NRT RAB
– blind handover
• Redirection during the transition to CELL_DCH:
– state transitions from CELL_FACH, URA_PCH or CELL_PCH
– does not include transition from RRC Idle mode
– blind handover
• Redirection after detecting inactivity in CELL_DCH:
– inactivity detected for last active PS NRT MAC-d flow
– inter-frequency handover with compressed mode measurements
• Redirection due to Mobility:
– addition of cell to active set which has different preferred layer definitions
– inter-frequency handover with compressed mode measurements
MBLBRABSetupEnabled
MBLBRABSetupEnabled = 1
MBLBStateTransEnabled
MBLBStateTransEnabled=0
MBLBInactivityEnabled
MBLBInactivityEnabled=0
Multi-Band Load Balancing is only activated for RAB Setup Triggering Criteria
MBLBMobilityEnabled
MBLBMobilityEnabled=0