68999302 enabling ldr algorithms to reduce the ce congestion case
DESCRIPTION
ldrrr 3gTRANSCRIPT
Enabling LDR Algorithms to reduce the CE congestion case Initial
Author Hu Mingchao ID 114879Representative UMTS RNP Product RNP&RNO
Date 2009-08-25Version(VxxxRxxxCxxxBxxx)
RNC V200R010C01B061
Checked by
Name： Enabling LDR Algorithms to reduce the CE congestion casePhenonema：
HSPA user increased so many in one UMTS Network after launch. And some sites appear CE Congestion for the uplink.
RN
CIDCellId
Time(As
day)
VS.RRC.At
tConEst.Ce
ll
VS.RRC.Succ
ConnEstab.Ce
ll.Rate
VS.RRC.SuccC
onnEstab.Servic
e.Cell.Rate
VS.RRC.SuccCo
nnEstab.Other.Ce
ll.Rate
VS.RRC.Rej.U
L.CE.Cong
RRC Setup
Block Rate due
to the UL CE
Congestion
22 52851 2009-5-11 12558 96.83% 97.55% 96.12% 155 1.23%
22 52852 2009-5-11 12054 96.08% 96.35% 95.83% 117 0.97%
22 52853 2009-5-11 5408 96.22% 96.74% 95.37% 252 4.66%
Alarm： None.
Cause： In order to reduce the UL CE congestion, we suggest that customers expand the CE. But they didn’t want to buy more CE license right now.So we use the algorithm optimization to reduce the CE congestion in a short target. It should be enable the hot traffic site WMEC1 and check the performance after enable the LDR algorithms base on the CE.Algorithm Switches need to be enabled
Cell LDC algorithm
switch
Load control algorithm switch NodeB LDC algorithm switch
Type A CELL_CREDIT_LDR LC_CREDIT_LDR_SWITCH -
Type C - NODEB_CREDIT_LDR_SWITCH NODEB_CREDIT_LDR
Process 1．How to set the LDR algorithms:
a) ADD NODEBALGOPARA: NodeBLdcAlgoSwitch=NODEB_CREDIT_LDR-1;
(NodeB Level)
b) SET LDCALGOPARA: LdcSwitch=NODEB_CREDIT_LDR_SWITCH-1; (NodeB
level)
c) ADD CELLALGOSWITCH: NBMLdcAlgoSwitch=CELL_CREDIT_LDR-1; (Cell
level)
2．If we enable the LDR algorithms, and DCCC Algorithm should be enable at the same time.
How to set the DCCC algorithms:
a) SET CORRMALGOSWITCH: ChSwitch=DCCC_SWITCH-1; (RNC level)
b) BE service reduction: ADD CELLLDR: CellId=11111,
2023-4-28 No. 1, Total 3
Enabling LDR Algorithms to reduce the CE congestion case Initial
UlLdrFirstAction=BERateRed, UlLdrSecondAction=NoAct;
3. We Enable the LDR algorithms At 2009-5-11 21:30.
1). RRC Setup Compare
The following table shows us the RRC Setup Block rate decreased and also the RRC Setup success
rate increased after the enabling the LDR algorithm by CE congestion.
RN
CIDCellId
Time(As
day)
VS.RRC.
AttConEst
.Cell
VS.RRC.Succ
ConnEstab.Cel
l.Rate
VS.RRC.SuccC
onnEstab.Servi
ce.Cell.Rate
VS.RRC.SuccCo
nnEstab.Other.Ce
ll.Rate
VS.RRC.Rej.U
L.CE.Cong
RRC Setup
Block Rate due
to the UL CE
Congestion
22 52851 2009-5-11 12558 96.83% 97.55% 96.12% 155 1.23%
22 52852 2009-5-11 12054 96.08% 96.35% 95.83% 117 0.97%
22 52853 2009-5-11 5408 96.22% 96.74% 95.37% 252 4.66%
22 52851 2009-5-12 6747 97.98% 98.22% 97.79% 27 0.40%
22 52852 2009-5-12 11383 98% 98.57% 97.43% 30 0.26%
22 52853 2009-5-12 11879 97.82% 98.10% 97.35% 56 0.47%
2). PS RAB Setup Success Rate compare
The following PS RAB Block rate due to the UL CE congestion rate get low than before.
And the PS RAB Setup Fail times due to the UL CE congestion get less than before.
RNCI
DCellId
Time(As
day)
VS.RAB.FailEstabPS.
Cell
VS.RAB.AttE
stabPS.Cell
VS.RAB.FailE
stPs.ULCE.Co
ng
PS RAB Block Rate Due
To the UL CE Congestion
22 52851 2009-5-11 2284 7404 289 3.90%
22 52852 2009-5-11 1554 3471 258 7.43%
22 52853 2009-5-11 4460 9914 598 6.03%
22 52851 2009-5-12 3225 7055 73 1.03%
22 52852 2009-5-12 2385 4845 41 0.85%
22 52853 2009-5-12 6658 11887 158 1.33%
3). When enable the LDR algorithms base on the UL CE, the BE Service bits rate reduce times.
The following table show us when the LDR algorithms base on the UL CE work normally.
Notes: Until now only enable the algorithms to reduce the BE service bits rate in UL.
RNCID CellId Time(As day) VS.LCC.LDR.BERateUL
22 52851 2009-5-11 0
22 52852 2009-5-11 0
22 52853 2009-5-11 0
22 52851 2009-5-12 1613
22 52852 2009-5-12 195
22 52853 2009-5-12 15
2023-4-28 No. 2, Total 3
Enabling LDR Algorithms to reduce the CE congestion case Initial
Suggest and Summary：
LDR algorithms work normally and reduce the UL CE consumption.
LDR algorithms base on the CE only can avoid the basic congestion in
WCDMA system. For heavy congestion sites such as the WMEC1, LDR
algorithms base on the CE can not clear up the all CE congestion.
HUAWEI recommend operator to expand the hardware capacity to avoid the
CE congestion at all.
Attached：Others:
2023-4-28 No. 3, Total 3