Download - UMTS Traning - 3G Basic 1
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
Convolutional Code 1/2 1234 11 22 33 44
Convolutional Code 1/3 1234 111 222 333 444
Interleaving 1234 123 124 134 234
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!!
Good!
Louder Plz!
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) 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
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
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 Channel
Dedicated Channel
Common Channel
Physical 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 2G-3G Consistecy Check
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 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 Sub Items
RRC.FailConnEstab.Cong
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
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
Counter RAB CS Fail Related: Measurement Item
Level 1
Sub Items
Level 2
Sub Items
Level 3
Sub Items
Level 4
VS.RAB.FailEstabCS.RNL VS.RAB.FailEstCS.Unsp VS.RAB.FailEstabCS.
Cong
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 Description VS.FailEstabCS.CfgUnsup Configuration unsupported VS.FailEstabCS.PhyChFail Physical channel failure VS.FailEstabCS.IncCfg Invalid configuration VS.FailEstabCS.NoReply No reply
Counter RAB PS Fail Related: Measurement Item
Level 1
Sub Items Level 2 Sub Items Level 3
VS.RAB.FailEstPS.RNL 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 Description VS.FailEstabPS.CfgUnsup Configuration unsupported VS.FailEstabPS.PhyChFail Physical channel failure VS.FailEstabPS.IncCfg Invalid configuration VS.FailEstabPS.NoReply 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
VS.RAB.AbnormRel.CS.RF.ULSync
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
VS.RAB.AbnormRel.PS.RF.SRBReset
VS.RAB.AbnormRel.PS.RF.ULSync
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