October 2012 Arum Setyo
[email protected]
3G
Introduction 3G Power Control 3G Mobility Management 3G Call Process Signaling 3G Radio Interface Channel 3G Radio Interface Protocol 3G Handover 3G Optimization Concept 3G Formula and Counter 3G KPI analyze How to choose WPC candidate
Increase
Capacity Development Rate of mobile comm Demands on Multimedia
Capacity Coverage QoS
(they will give affect to each other)
Source
Coding Channel Coding Spreading Scrambling Modulation Transmit
Increase
Tx Efficiency Analog to Digital Converter Performed in UE PS no need source coding. Why?
Make
Tx More Reliable by put more redundant bits Use for overcoming Interference/Fading Use Interleaving for serious fading
We
use it regarding to their QoS Channel Coding Type:
For CS Service use convolution code (1/2, 1/3) For PS Service use Turbo code (1/3) Add Interleaving Code Sent as 11 22 33 44 Convolutional Code 1/2 1234 Convolutional Code 1/3 1234 111 222 333 444 1234 123 124 134 234 Interleaving
Increase
the Capability to Overcome Interference
Processing Gain (PG)
Different service, different PG PG low = UE Tx Power high PG low = Coverage is much more smaller
That’s why PG is referred as SF
Make
Tx more secure!
Digital
to radio signal converter
λ is wave-length Wave-length affecting antenna dimension The more high freq (f), antenna dimension will be smaller
Too Weak!
Louder Plz! Still Weak!!
Louder Plz!
Good!
Tx
power cannot be set to be as high as possible. It will waste the power and Will cause extra interference to other users.
In
WCDMA system, Each user is an interference source to other users. So, each user’s Tx power should be minimized.
So,
the main purpose of Power Control is to adjust users Tx power to be just enough (adaptive following radio propagation environment)
Quality
(BLER) is to be satisfied. Interference is to be minimized;
UTRAN
doesn’t know anything about UE but CORE knows LAC/RAC of UE No RRC Connection Still receive Paging (PCH) Process
PLMN Selection Reselection Cell Selection Reselection Location Area registration
Cell_DCH (200 mA – 300 mA)
Cell_FACH (100 mA – 150 mA)
RRC Connection active UTRAN allocated Common Channel Use for signalling with PS service (Low data Rate, Traffic volume is not too high)
Cell_PCH
RRC Connection active UTRAN allocated Dedicated Channel Use on CS PS service with High data Rate (Traffic volume is high) Paging only sent to this cell
RRC Connection active UE connected but no data transmit UE only monitor PICH
URA_PCH
URA = UTRAN Registration Area Change state from Cell_PCH to Cell_FACH (cell update) that happens too fast URA defined from several different of NodeBs. There is a threshold timer to decide the state changes from Cell_PCH to Cell_FACH (if cell_PCH happens for x time, then change to URA_PCH) Why have to change to URA_PCH? because too many changes from Cell_PCH to Cell _FACH are not good for system capacity
RAB Release will trigger Iu Release
Logical
Channel
Control Channel Service Channel (Traffic)
Transport
Dedicated Channel Common Channel
Physical
Channel
Channel
UL/DL Physical Channel Dedicated carrier phase code (OVSF, SC)
Intra-Frequency
(SHO)
Soft HO Softer HO Hard HO
Inter-Frequency
(IFHO) Inter-RAT Frequency (IRATHO/ISHO)
3G to DCS 3G to GSM
Database
Cross check 2G CFGMML with External 2G on 3G CFGMML (parameter check on 2G: MCC, MNC, LACCI, NCC, BCC, BCCH, RAC) Old database still not yet erased
Failure
on 2G due to cell unavailable/Alarm
Cross check IRATHO NCell
Failure
2G-3G Consistecy Check
on 2G due to congestion
Cross check IRATHO NCell
Optimizing
Neighbor based on scenario given Blind HO setting Check availability/alarm on surroundings
Do
scanning (via drive test) Locate pollutant area Do Neighbor list verification
Remove nbr that is not measured but in Nbr list Add missing neighbor
Check
pollutant, whether it’s from overshooting site or site nearby Check and Adjust physical configuration Check and Adjust CPICH Power
TP
use for checking overshoot sites 1 unit TP equals to 234m in distance
RTWP
can be caused by bad weather, feeder broken, port feeder broken, or traffic fluctuation (load).
CSSR
DCR
SHO,
IFHO, IRATHO
Related
to RRC Reject / RRC Failure Related to RAB Failure Counter RRC Fail Related: Measurement Item
RRC.FailConnEstab.Cong
RRC.FailConnEstab.NoReply VS.RRC.Rej.Redir.Dist VS.RRC.Rej.Redir.InterRat VS.RRC.Rej.Redir.IntraRat VS.RRC.Rej.Redir.Service VS.RRC.Rej.RL.Fail VS.RRC.Rej.TNL.Fail
Sub Items VS.RRC.Rej.ULIUBBand.Cong, VS.RRC.Rej.DLIUBBand.Cong VS.RRC.Rej.ULPower.Cong, VS.RRC.Rej.DLPower.Cong VS.RRC.Rej.ULCE.Cong, VS.RRC.Rej.DLCE.Cong VS.RRC.Rej.Code.Cong
Counter Measurement Item Level 1 VS.RAB.FailEstabCS.RNL
RAB CS Fail Related: Sub Items Level 2 VS.RAB.FailEstCS.Unsp
Sub Items Level 3 VS.RAB.FailEstabCS. Cong
Sub Items Level 4 VS.RAB.FailEstCs.ULPower.Cong VS.RAB.FailEstCs.DLPower.Cong VS.RAB.FailEstCs.Code.Cong VS.RAB.FailEstab.CS.DLIUBBand. VS.RAB.FailEstab.CS.ULIUBBand. VS.RAB.FailEstCs.ULCE.Cong VS.RAB.FailEstCs.DLCE.Cong
VS.RAB.FailEstabCS.UuFail VS.RAB.FailEstabCS.IubFail VS.RAB.FailEstabCS.TNL
Measurement Item VS.FailEstabCS.CfgUnsup VS.FailEstabCS.PhyChFail VS.FailEstabCS.IncCfg VS.FailEstabCS.NoReply
Description Configuration unsupported Physical channel failure Invalid configuration No reply
Counter Measurement Item Level 1 VS.RAB.FailEstPS.RNL
RAB PS Fail Related:
Sub Items Level 2
Sub Items Level 3
VS.RAB.FailEstPS.Unsp
VS.RAB.FailEstPs.ULPower.Cong VS.RAB.FailEstPs.Code.Cong VS.RAB.FailEstab.PS.DLIUBBand.Cong VS.RAB.FailEstab.PS.ULIUBBand.Cong VS.RAB.FailEstPs.ULCE.Cong VS.RAB.FailEstPs.DLCE.Cong VS.RAB.FailEstPs.DLPower.Cong
VS.RAB.FailEstabPS.UuFail VS.RAB.FailEstabPS.IubFail
VS.RAB.FailEstPS.TNL Measurement Item VS.FailEstabPS.CfgUnsup VS.FailEstabPS.PhyChFail VS.FailEstabPS.IncCfg VS.FailEstabPS.NoReply
Description Configuration unsupported Physical channel failure Invalid configuration No reply
Related
to RAB Loss / RAB Abnormal Release Counter RAB CS Loss related: Abnormal Release Indicator
Sub-indicator (Level 2) VS.RAB.AbnormRel.CS.RF.ULSync
VS.RAB.AbnormRel.CS.RF
VS.RAB.AbnormRel.CS.RF.UuNoReply VS.RAB.AbnormRel.CS.RF.SRBReset
VS.RAB.AbnormRel.CS.OM VS.RAB.AbnormRel.CS.Preempt VS.RAB.AbnormRel.CS.UTRANgen VS.RAB.AbnormRel.CS.OLC
VS.RAB.AbnormRel.CS.IuAAL2
Related
to RAB Loss / RAB Abnormal Release Counter RAB PS Loss related: Abnormal Release Indicator
Sub-indicator (Level 2) VS.RAB.AbnormRel.PS.RF.SRBReset VS.RAB.AbnormRel.PS.RF.ULSync
VS.RAB.AbnormRel.PS.RF
VS.RAB.AbnormRel.PS.RF.UuNoReply VS.RAB.AbnormRel.PS.RF.TRBReset
VS.RAB.AbnormRel.PS.OM VS.RAB.AbnormRel.PS.Preempt VS.RAB.AbnormRel.PS.OLC VS.RAB.AbnormRel.PS.GTPULoss
Counter
SHO fail related:
Failure Indicator VS.SHO.FailASU.NoReply.NCell VS.SHO.FailRLAddIur.OM.Rx VS.SHO.FailRLAddIur.TransCong.Rx VS.SHO.FailRLAddIur.HW.Rx VS.SHO.FailRLAddIur.Cong.Rx VS.SHO.FailRLAddIur.CfgUnsRx VS.SHO.FailRLRecfgIur.NoReply VS.SHO.FailRLRecfgIur.OM.Rx VS.SHO.FailRLRecfgIur.HW.Rx VS.SHO.FailRLRecfgIur.Cong.Rx
VS.SHO.FailRLRecfgIur.CfgUnsupp.Rx VS.SHO.FailRLSetupIur.HW.Tx VS.SHO.FailRLSetupIur.CongTx VS.SHO.FailRLSetupIur.CfgUTx VS.SHO.FailRLSetupIur.TransCongTx
Counter
IFHO fail related:
Failure Indicator VS.HHO.FailInterFreqOut.CfgUnsupp VS.HHO.FailInterFreqOut.PyhChFail VS.HHO.FailInterFreqOut.ISR VS.HHO.FailInterFreqOut.CellUpdt VS.HHO.FailInterFreqOut.InvCfg VS.HHO.FailInterFreqOut.InterRNC.CfgUnsupp VS.HHO.FailInterFreqOut.InterRNC.PhyChFail VS.HHO.FailInterFreqOut.InterRNC.ISR
VS.HHO.FailInterFreqOut.InterRNC.InvCfg VS.HHO.FailInterFreqOut.InterRNC.CellUpdt VS.HHO.FailInterFreqOut.InterRNC.NoReply VS.HHO.FailInterFreqOut.NoReply VS.HHO.FailInterFreqOut.PrepFail VS.HHO.FailInterFreqOut.RLSetupFail
Counter
ISHO CS fail related:
Failure Indicator VS.IRATHO.FailInCS.NoReply VS.IRATHO.FailOutCS.Abort VS.IRATHO.FailOutCS.NoReply VS.IRATHO.FailRelocPrepInCS.Abort VS.IRATHO.FailRelocPrepInCS.ResUnavail VS.IRATHO.FailRelocPrepInCS.TgtHighLoad VS.IRATHO.FailRelocPrepInCS.TRNCSysFailReloc VS.IRATHO.FailRelocPrepInCS.TRNCSysRelocUnsupp VS.IRATHO.FailRelocPrepOutCS.Abort VS.IRATHO.FailRelocPrepOutCS.Cancel VS.IRATHO.FailRelocPrepOutCS.CNNoReply VS.IRATHO.FailRelocPrepOutCS.ReqInfoNotAvail VS.IRATHO.FailRelocPrepOutCS.TAlExp.GCell VS.IRATHO.FailRelocPrepOutCS.TgtFail.GCell IRATHO.FailRelocPrepOutCS.ReloNoSup(none) IRATHO.FailRelocPrepOutCS.NoResAvail(none) IRATHO.FailRelocPrepOutCS.HigherTrafficLod(none) IRATHO.FailRelocPrepOutCS.UKnowRNC(none) IRATHO.FailOutCS.CfgUnsupp(none) IRATHO.FailOutCS.PhyChFail(none)
Counter
ISHO PS fail related:
Failure Indicator VS.IRATHO.FailOutPS VS.IRATHO.FailOutPS.Abort VS.IRATHO.FailOutPSUTRAN.NoReply VS.IRATHO.FailRelocInPS.NoReply VS.IRATHO.FailRelocOutPS.CfgUnSupp VS.IRATHO.FailRelocOutPS.NoReply VS.IRATHO.FailRelocOutPS.PhyChFail VS.IRATHO.FailRelocPrepInPS.ReloUnSupp VS.IRATHO.FailRelocPrepInPS.ResUnavail VS.IRATHO.FailRelocPrepInPS.TgtFail VS.IRATHO.FailRelocPrepInPS.TgtHighLoad VS.IRATHO.FailRelocPrepOutPS.NoResAvail VS.IRATHO.FailRelocPrepOutPS.ReloUnSupp VS.IRATHO.FailRelocPrepOutPS.TAlExp VS.IRATHO.FailRelocPrepOutPS.TgtFail VS.IRATHO.FailRelocPrepOutPS.TgtHighLoad VS.IRATHO.FailRelocPrepOutPS.UnKnowRNC IRATHO.FailOutPSUTRAN.CfgUnsupp(none) IRATHO.FailOutPSUTRAN.PhyChFail(none)
See
traffic fluctuation how it can affect to the rate
See
from which side (RRC or RAB) the failure cause contribute the most (in this case RRC)
See
RRC failure details which contribute the most
See
RAB CS failure details which contribute the most
See
traffic fluctuation how it can affect to the rate
See
from which side (RRC or RAB) the failure cause contribute the most (in this case RAB)
See
RRC failure details which contribute the most
See
RAB PS failure details which contribute the most
See
DRD RB failure incomming
See
traffic fluctuation how it can affect to the rate
See
Total loss (attempt) fluctuation how it can affect to the rate
See
RAB CS Loss details which contribute the most
See
traffic fluctuation how it can affect to the rate
See
Total loss (attempt) fluctuation how it can affect to the rate
See
RAB PS Loss details which contribute the most
See
the attempt fluctuation how it can affect to the rate
See
detail failure cause on SHO:
See
the attempt fluctuation how it can affect to the rate
See
detail failure cause on IFHO:
See
the attempt fluctuation how it can affect to the rate
See
detail failure cause on ISHO CS:
See
the attempt fluctuation how it can affect to the rate
See
detail failure cause on ISHO PS:
Do
daily for weekly result Steps for choosing WPC candidate:
Look KPI degradation in RNC Daily/BH Level Get the highest failure cause in RNC daily/BH Level Get failure cause counter per cell daily/BH Level
Select Rate below threshold Sort Failure number in descending (Higest to Lowest) Do weighting process to choose the cell with high attempt and bad rate [weighting = (rate*fail number)] Get your Top5 or Top10 candidate to optim
