Download - KPI Definition
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KPI definition
3G RANOP RU30
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Course Content
KPI definition
Performance monitoring
Air interface optimization
Traffic monitoring
Capacity enhancement
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Module Objectives
Describe the principles of 3G optimization
Give an overview about the performance measurements and newfeatures offered by RU30
Discuss the purpose of the most important KPIs (setup, access,
drop, mobility and throughput performance) and the factors impacting
them
At the end of the module you will be able to:
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KPI Definition
Principles of 3G network optimization
Principles of performance measurements and KPI classification
KPI construction
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Principles of 3G network optimization
Optimization strategy
Quality & Key Performance
Performanceindicators
RANparameters
Counters(OSS/NetAct)
RRM/Field/installation Cell CoverageCell Capacity
Radio/Signaling
capabilities
Transmission
capacity
Core/Mobility
performance
HWcapability
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Target issues for optimizations are e.g.To achieve coverage and capacity RAN improvements by tuning ofinterference situations within the network
Therefore check RRM to ensure that the RAN offers planned coverage foreach targeted service
Evaluate high capacity i.e. low blocking for new calls and handovers
Observe network performance by overall counters (NetAct, RNC counters)
Define quality indicators and compare KPIs by triggering points
Check overall Quality of Service at RAN, transmission and core
Optimize the use of available capacity by priorities
Continuously monitoring/adjusting how the available resources are used inaccordance with user requests !
Optimization strategy
Principles of 3G network optimization
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Key perform ance indicator imp rovement
Performance evaluationFailure causesEvent /Action item
PERFORMANCE
Targets
COUNTERDescriptive statistics
KeyPerformance indicatorSignaling / Traffic RT/NRT
RRC / RAB / CORE
COUNTER
statistics
Targets
fulf i l led ? Evaluat ion
Fai lure c auses
Uu / WBTS /
AA L2 / RNC
Indicat ion
KPI
Targets
Event / Action item /improvement
No activ i t ies
Optimisation
Signaling / user plane
Principles of 3G network optimization
Yes No
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Operator can define several KPIs:
Blocking rate (e.g. for RRC 0.5%, RT RAB 1%, NRT RAB 0.1%, PS session 5%)
Call drop rate (e.g. for RT RAB 0.5%, NRT RAB 2%)
Handover success rate (e.g. for SHO 95%, for ISHO 80%)
Report statistics generated by vendor MML commands (WBTS, RNC)
Evaluated for accessibility, retainability, usage, mobility and integrity (BLER)
Graphical representation of statistics (e.g. NetAct Report Suite)
In addition reporting and monitoring by probes
Principles of 3G network optimization
Quality benchmark
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100%*KPI attempts)all_setup_(e.g.all_call_eventsNumber_of_ups)l_call_set.successfuresult(e.gh_desired_events_witNumber_of_
KPI counts events
Operator must specify target value to
evaluate performance
Limited qualitative analysis only, as nodetailed failure causes
Arithmetic mean only, but no discussionof statistical scatter
Principles of 3G network optimization
KPI principle and definition
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The KPIs to be monitored for the RAN could be e.g.
Cell availability
Call Setup Success Rate CSSR
Packet session setup success rate (NRT, HSDPA, HSUPA)
Call Drop rate
SHO / ISHO / HSPA serving cell change success rate
In NOLS
WCDMA RAN Key Performance Indicators
RNC counter description
NetAct data base description for RNC measurements
Key Performance Indicator Changes Measurement Changes
Principles of 3G network optimization
KPI principle and definition
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KPI Definition
Principles of 3G network optimization
Principles of performance measurements and KPI classification
KPI construction
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BS
RNC 3G MSC
3G SGSN
GGSN Firewall
FMT
GPRS
Backbone
Internet
PS data
server
PSTN
CS data
serverModem
RAN KPI
Principles of performance measurements
RAN KPI classificationaccording functionality
The RAN KPI can be classified into the following categories
Accessibility
Retainability
Usage
Mobility
Integrity (BLER)
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Relocation
RNC1SRNC
UEBTS2
BTS1
RNC2DRNC
Accessibility:RRC Setup & Access Rate
RAB Setup & A ccess Rate
Call Setup Su ccess Rate
XRetainability:RRC Drop Rate
RAB Dro p Rate
Mobility:SHO Success Rate
SHO Overhead
Usage:Average UL Load
Average DL Load
X Pre-emption
Principles of performance measurements
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RNC radio network counter
# 1xxx
W-BTS counter (HSPA, CE, CQI) #
50xx / 51xx
AXC counter #
52xxRNC PDH counter #
1xx
RNC signalling counter (SCCP) #
2xx
RNC ATM /IP transport counter #
5xx/8xxRNC DSP counter #
6xx
RNC multi-controller counter
(CPU) # 2xxx
Principles of performance measurements
RAN KPI classificationaccording network element
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M1000 Cell resourceM1001 Service level
M1002 Traffic
M1003 L3 signaling at Iu
M1004 L3 signaling at Iur
M1005 L3 signaling at Iub
M1006 RRC signalingM1007 Soft handover
M1008 Intra-system hard handover
M1009 L3 relocation signaling
M1010 Inter-system handover
M1011 Location services
M1012 Service area broadcastM1013 Autodef SHO
M1014 Autodef IFHO
M1015 Autodef ISHO
M1016 RCPM OLPCM1017 RCPM RLC
M1018 RCPM UEQ
M1021 Iu-PC Interface
M1022 Packet call
M1023 Cell throughput
M1024 RCPM OLPC WCELM1025 RCPM OLPC RNC
M1026 RCPM RLC WCEL
M1027 RCPM RLC RNC
M1028 Autodef SHO DSR
M1031 WBTS Resource
M1032 CS Voice HSPA User PlaneM1033 CPICH Quality (EC/I0 and RSCP statistics)
New counters and performance measurements RU30
RNC radio network part measurements with new counters
new measurements
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New counters and performance measurements RU30
M5000 HSPA in WBTS MeasurementM5001 WBTS HW Resource Measurement
M5002 Cell Throughput in WBTS Measurement
M5003 Frame Protocol in WBTS Measurement
M5004 Signaling Load in WBTS Measurement
M5005 HSPA in WBTS Extension Measurement (number of DC HSPA users, PIC state)
M5006 WBTS R99 HW Measurement (CE for R99 and AMR over HSPA)M5101 FTM PDH Interface Measurement
M5102 FTM SDH Interface Measurement
M5105 FTM ATM Interface Measurement
M5106 FTM ATM VC Connection Measurement
M5107 FTM ATM VC Connection Measurement
M5110 FTM Ethernet Link MeasurementM5113 FTM Pseudowire MPLS Measurement
M5114 FTM PSN Tunnel IP Measurement
W-BTS part measurements with new counters
new measurements
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New counters and performance measurements RU30
M5115 AAL2 Scheduling Performance in BTS MeasurementM5116 FTM Timing over Packet Measurement
M5117 FTM IP Statistics Measurement
M5118 FTM PHB Statistics Measurement
M5119 FTM CES over PSN Interface Measurement
M5120 FTM CES over PSN pseudowire tunnel Measurement
M5121 FTM CES over PSN Pseudowire MeasurementM5122 FTM IPSec Measurement
M5123 FTM VLAN PHB Statistics Measurement
M5124 FTM VLAN IP Statistics Measurement
M5125 FTM VLAN Statistics Measurement
M5126 FTM TWAMP Statistics Measurement
M5127 PPP Multi Link Statistics MeasurementM5128 PPP Single Link Statistics Measurement
W-BTS part measurements with new counters
new measurements
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New counters and performance measurements RU30
RNC transport and HW part measurements with new counters
new measurements145 PDH Statistics
208 MTP Signalling link availability
209 MTP signalling link performance
210 MTP signalling link utilization
211 MTP signalling point status
212 MTP Signalling link set and route set availability
213 MTP Signalling traffic report of signalling points
214 MTP Signalling traffic report of user parts
215 MTP matrix signalling traffic
216 SCCP signalling point
217 SCCP subsystem
218 SCCP local subsystem availability
219 SCCP single meters
513 STM-1 Interface
514 IMA Logical Interface
516 SONET/SDH Protection Group meas
528 ATM layer performance
529 ATM Virtual Path Connection
530 ATM Virtual Channel Connection
531 ATM Route Load
532 ATM Interface533 ATM VCC Bundle
546 SAAL signalling protocol at UNI
547 AAL5 Protocol Measurement in DMX
548 AAL2 signalling protocol at UNI
549 AAL5 Protocol Meas. in CHORUS
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New counters and performance measurements RU30
RNC transport and HW part measurements with new counters
new measurements550 AAL2 path CAC resource
552 AAL2 signalling at NNI
553 AAL2 Scheduling Performance in RNC
563 TCP/IP Protocol
564 Ethernet Interface Performance
565 IP measurement on IP interface
566 UDP measurement on IP interface
567 IP QoS measurement
568 IP Based Route measurement
592 Unit Load
594 WAC overload control
608 Availability Performance609 DSP service statistics
610 L2 Resource Utilization (multi-controller)
612 DSP state changes
615 DSP Resource Utilization
617 DSP load
661 M3UA Association Set
800 AAL2 Resource Reservation
801 Iu-PS Performance
802 RNC capacity usage803 RNC RTP/RTCP
804 RNC IP CAC
2002 CPU Usage (multi-controller)
2004 Networking Logical (multi-controller)
2007 Node Level CPU load (multi-controller)
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Performance monitoring Feature NumberAutomatic object list update RAN1438
User management for online monitoring RAN2290
Principles of performance measurements
New performance measurement features RU30
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Principles of performance measurements
New HW and SW features in RU30
Frequency domain equalizerRAN1702
HSUPA interference cancellation receiverRAN1308
Dynamic HSDPA BLERRAN2171
Multi band load balancing and blind inter-frequency HORAN2172
Enhanced serving cell changeRAN1911
Dual cell HSDPA with MIMO and 64QAMRAN1907
4Rx diversityRAN1269
MIMO and 64QAMRAN1912
Flexi 3 sector RF module 1900 MHzRAN1575
HS Cell_FACH on DLRAN1637
New FeatureRAN
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KPI Definition
Principles of 3G network optimization
Principles of performance measurements and KPI classification
KPI construction- KPI Factors
- Access and setup
- Drop (Retainability)
-Mobility
-Throughput
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IMPACT of network
performance
BTS, RNC, PS Core, CSCore performance
Performance of UE andfield measurement tools
Quality of networkimplementation
Application servers, IPbackbone performanceQuality of network operation
and maintenance
KPI factors
Factors affecting KPIs
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KPI factors
Factors affecting KPIs
Many factors and network elements can affect network performance, e.g.
Quality of network equipment, both hardware and software (BTS, RNC, PS and CS
core, transmission equipment)
Performance of UE and field measurement tools (inter-operability, sensitivity ofmeasurement parameters, level of accuracy)
Quality of network planning and optimization (coverage, interference, parametertuning, capacity dimensioning, site acquisition)
Quality of network implementation (site and network equipment installation,
integration and commissioning)
Quality of network operation and maintenance
Multi-vendor environment (application servers, IP backbone, core versus RAN)
Measurement method (test setup, service dependency, cluster or system level,clutter type)
KPI f t
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Server
RNC
W-BTS
UE
Power controlRACH process
UE power consumptionUE power spikingUE Sensitivity
UE Measurement performance
Cell reselectionSHORelocationInter-RAT mobility
UE IP configurationSupport of robust IP
header compression
KPI factors
UE impact on performance
UE feature supportCell_PCH64 QAMMIMODual cell HSPA
KPI f t
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KPI factors
UE impact on performance
The functionalities of different UEs are not similar, there are differences in
Power control and RACH process
SRNC relocation support
Cell FACH/PCH performance
Cell reselection and inter-RAT mobility
Throughput (e.g. during SHO)
UE power consumption
UE power spiking
UE Measurement performance (cell reselection, Cell_DCH, ISHO)
UE Sensitivity
Data card throughput
Malfunctioning of certain UEs will naturally cause drops in setup or active phase
KPI D fi iti
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KPI Definition
Principles of 3G network optimization
Principles of performance measurements and KPI classification
KPI construction- KPI Factors
- Access and setup
- Drop (Retainability)
-Mobility
-Throughput
KPI t ti RRC t
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UE
RRC: Connection Request
RRC Connection Setup phaseResource Reservation in RNC, BTS, Transmission
RRC: Connection Setup
RRC Connection Access phaseRNC waits reply from UE
RRC: Connection Setup Complete
BTS RNC CN
KPI constructionRRC setup
Definition RRC connection (service level measurements M1001)
RRC setupsuccess rate
KPI construction RRC setup
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ion_setupsce_connector_RRC_voiattempts_f
on_setupse_connectif_RRC_voicfailures_oion_setupsce_connector_RRC_voiattempts_ftesuccess_raRRC_setup_
KPI constructionRRC setup
RRC setup success rate (voice)
REP = repetitive attempt due to
RRC connection rejectNOT treated as fault, if userfinally gets service
REL = cell reselection during setup
UE does not respond to RNC in 1st
cellBut requests service again in 2ndcell
Emergency calls redirected to GSM
RG_CALLTP_REJ_EMERRC_CONN_S
L_MT_CONVRRC_ACC_REL_MO_CONVRRC_ACC_REYL_EMERGENCRRC_ACC_REYP_EMERGENCRRC_ATT_REP_MT_CONVRRC_ATT_REP_MO_CONVRRC_ATT_RE
CALL_ATTSEMERGENCY_ALL_ATTSMTC_CONV_CALL_ATTSMOC_CONV_C
L_MT_CONVRRC_ACC_REL_MO_CONVRRC_ACC_REYL_EMERGENCRRC_ACC_RE
CALL_FAILSEMERGENCY_CALL_ATTSEMERGENCY_
ALL_FAILSMTC_CONV_CALL_ATTSMTC_CONV_C
ALL_FAILSMOC_CONV_CALL_ATTSMOC_CONV_C
tesuccess_raRRC_setup_
KPI construction RRC setup
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PR_SIGNL_MT_HIGH_RRC_ACC_RE-PR_SIGNL_MO_HIGH_RRC_ACC_RE
L_MT_BACKGRRC_ACC_REL_MT_INTERRRC_ACC_RE
L_MO_BACKGRRC_ACC_REL_MO_INTERRRC_ACC_RE
P_MT_BACKGRRC_ATT_REP_MO_BACKGRRC_ATT_RE
PR_SIGNP_MT_HIGH_RRC_ATT_RE-PR_SIGNP_MO_HIGH_RRC_ATT_RE
P_MT_INTERRRC_ATT_REP_MO_INTERRRC_ATT_RE
CALL_ATTSMTC_BACKG_CALL_ATTSMTC_INTER_ATTSRIOR_SIGN_MTC_HIGH_P
ATTSRIOR_SIGN_MOC_HIGH_PCALL_ATTSMOC_BACKG_CALL_ATTSMOC_INTER_
PR_SIGNL_MT_HIGH_RRC_ACC_RE-PR_SIGNL_MO_HIGH_RRC_ACC_RE
L_MT_BACKGRRC_ACC_REL_MT_INTERRRC_ACC_RE
L_MO_BACKGRRC_ACC_REL_MO_INTERRRC_ACC_RE
FAILSRIOR_SIGN_MTC_HIGH_P-ATTSRIOR_SIGN_MTC_HIGH_P
FAILSRIOR_SIGN_MOC_HIGH_P-ATTSRIOR_SIGN_MOC_HIGH_P
CALL_FAILSMTC_BACKG_CALL_ATTSMTC_BACKG_
CALL_FAILSMTC_INTER_CALL_ATTSMTC_INTER_
CALL_FAILSMOC_BACKG_CALL_ATTSMOC_BACKG_
CALL_FAILSMOC_INTER_CALL_ATTSMOC_INTER_
tesuccess_raRRC_setup_
KPI constructionRRC setup
RRC setup success rate (NRT)
Analogue to voice
Includes interactive, background and high priority signaling services
Does not include emergency calls
KPI construction RRC setup
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KPI constructionRRC setup
RRC setup success rate (example)
Typical target for RRC setup success rate 99.5%
Little resources needed
High processing gain due to SF256 / SF128 on DL / UL for SRB
KPI construction RAB setup
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RRC: Initial Direct Transfer (service request)
RANAP: Initial UE MessageDirect transfer (Call Proceeding)
RANAP: RAB AssignmentRequest
RRC: Radio Bearer Setup
RRC: Radio Bearer Setup Complete
RAB Connection Setup phaseResource Reservation in RNC, BTS, Transmission
RANAP: RAB AssignmentResponse
Direct transfer (Alerting)
Direct transfer (Connect)
Direct transfer (Connect Acknowledge)
RAB Connection Access phaseRNC waits reply from UE
UE BTS RNC CN
KPI constructionRAB setup
Definition RAB connection (service level measurements M1001)
RAB setup
success rat
KPI construction RAB setup
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KPI constructionRAB setup
RAB setup success rate (voice)
shmentsAB_establior_voice_Rattempts_f
ments_establish_voice_RABsuccessfultesuccess_raRAB_setup_
T_CS_VOICERAB_STP_AT
EMP_CS_VOICRAB_ACC_COtesuccess_raRAB_setup_
KPI construction RAB setup
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KPI constructionRAB setup
RAB setup success rate (NRT)
Analogue to voice
Includes interactive and background services
High priority signaling services have on RAB level traffic class background
T_PS_BACKGRAB_STP_AT
T_PS_INTERRAB_STP_AT
GMP_PS_BACKRAB_ACC_CO
RMP_PS_INTERAB_ACC_CO
tesuccess_raRAB_setup_
KPI construction RAB setup
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KPI construction RAB setup
RAB setup success rate (example)
Typical target for voice RAB setup success rate 99%
Little additional resources beyond RRC needed
Still high processing gain due to SF128 / SF64 on DL / UL for RB
KPI construction RAB setup
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KPI construction RAB setup
RAB setup success rate (example)
Typical target for NRT RAB setup success rate 99.9%
Hardly any additional resources beyond RRC needed
RAB setup with DCH0/0, i.e. only signaling, no service allocation
KPI construction call setup success rate
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shmentsAB_establior_voice_Rattempts_f
ments_establish_voice_RABsuccessful*
ion_setupsce_connector_RRC_voiattempts_f
on_setupse_connectif_RRC_voicfailures_o
ion_setupsce_connector_RRC_voiattempts_f
AMR_CSSR
CSSR = RRC setup SR * RAB setup SR
RRC: Connection Request
RRC: Connection Setup
UE RNC
+
CoreUE
Both setup phases
must be successful
RRC: Connection Setup
Complete
Service Request
RANAP RAB assignment
Procedure between core
and RNC
KPI construction call setup success rate
For NRT call analogue treatment
KPI construction call setup success rate
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KPI construction call setup success rate
Poor coverage or dominance or interference issues in radio interface
Capacity issues in radio or Iub interface
Configuration issues in WBTS (parameters or HW)
CSSR covers all the following steps
Initial RRC connection request of the UE to the network
RRC setup phase
RAB setup phase, until user data is starting to get transferred
Possible causes of low CSSR
KPI constructionpacket session setup
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UE
RRC: Capacity Request
PS Session Setup phaseResource Reservation in RNC, BTS, Transmission
RRC: Radio Bearer Reconfiguration
PS Session Access phase
RNC waits reply from UE
RRC: Radio Bearer Reconfiguration Complete
BTS RNC
p p
Definition packet session setup (packet call measurements M1022)
PS session setupsuccess rate
UE in Cell_FACH or with DCH 0/0
UE in Cell_DCH with data rate > 0 kbit/s (R99 or HS)
KPI constructionpacket session setup
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sallocationor_PS_DCH_attempts_f
locations_PS_DCH_alsuccessful
PS_SSSR
RAB established
PS decides about Cell_DCH or Cell_FACH
p p
R99 packet session setup success rate
100%*
_DCH_BGRPS_ATT_DCH
+_DCH_INTPS_ATT_DCHD_ALLO_BGRD_D_REQ_D_
+D_ALLO_INTD_D_REQ_D_
PS_SSSR
Request in DL: DCH Allocated in DL: DCH
Request in UL: DCH Allocated in UL: DCH
KPI contains interactive and background, but not PS streaming and conversational services
KPI constructionpacket session setup
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p p
R99 packet session setup success rate (example)
Typical target for packet session SSR 90% / 95% for data rate > / 64 kbps
High amount of resources needed especially for high data rate
Low processing gain especially for high data rate due to SF8 / SF4 on DL / UL
KPI constructionpacket session setup
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RSCH_DCH_BGPS_ATT_HSD+TSCH_DCH_INPS_ATT_HSDRESCH_DCH_STPS_ATT_HSD
GRSCH_EDCH_BPS_ATT_HSD+NTSCH_EDCH_IPS_ATT_HSDTRESCH_EDCH_SPS_ATT_HSD
GRS_D_ALLO_BHS_D_REQ_H+NTS_D_ALLO_IHS_D_REQ_HTRES_D_ALLO_SHS_D_REQ_H
GRS_D_ALLO_BHS_E_REQ_HNTS_D_ALLO_IHS_E_REQ_HTRES_D_ALLO_SHS_E_REQ_H
GRS_E_ALLO_BHS_E_REQ_H+NTS_E_ALLO_IHS_E_REQ_HTRES_E_ALLO_SHS_E_REQ_H
p_SSHSPDA_Setu
ns_allocatioor_HS_DSCHattempts_f
llocations_HS_DSCH_asuccessful
p_SRHSDPA_Setu
RAB established
PS decides about HS-DSCH, DCH or FACH
p p
HSDPA session setup success rate
Three combinations
HSDPA + HSUPA requested both allocated
HSDPA + HSUPA requested at least HSDPA allocatedHSDPA requested only HSDPA allocated
KPI contains streaming, interactive and background service
An analogue KPI for conversational service does not exist
KPI constructionpacket session setup
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HSDPA session setup success rate (example)
Typical target for HSDPA session setup success rate 90%
HSDPA session setup more often successful than R99 packet session setup
For HSDPA guarantee of 5 codes and reservation of CEs per packet scheduler
KPI constructionpacket session setup
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GRSCH_EDCH_BPS_ATT_HSD+NTSCH_EDCH_IPS_ATT_HSDTRESCH_EDCH_SPS_ATT_HSD
GRS_E_ALLO_BHS_E_REQ_H+NTS_E_ALLO_IHS_E_REQ_HTRES_E_ALLO_SHS_E_REQ_Hp_SSHSUPA_Setu
tionsDCH_allocaor_Eattempts_f
tionsDCH_alloca_Esuccessful
p_SRHSUPA_Setu
RAB established
PS decides about HS-DSCH, E-DCH, DCH or FACH
HSUPA session setup success rate
One combination only
HSDPA + HSUPA requested both allocated
KPI contains streaming, interactive and background service
KPI constructionpacket session setup
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HSUPA session setup success rate (example)
Typical target for HSUPA session setup success rate 90%
KPI Definition
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Principles of 3G network optimization
Principles of performance measurements and KPI classification
KPI construction- KPI Factors
- Access and setup
- Drop (Retainability)
-Mobility
-Throughput
KPI constructioncall drop rate
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5/23/2018 KPI Definition
47/75
Soc Classification level
47 Nokia Siemens Networks RN31571EN30GLA0
Radio link drop
Soft drop, RRC or RAB connection might still survive
UE BTS RNC CN
Types of drops
RRC drop
Hard drop, all RAB drop as well
RAB drop
Hard drop, but RRC connection might still survive
RAB drop = call drop
KPI constructioncall drop rate
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5/23/2018 KPI Definition
48/75
Soc Classification level
48 Nokia Siemens Networks RN31571EN30GLA0
uresue_to_failreleases_deasesnormal_rel
uresue_to_failreleases_d
CDR
Call drop rate (service level measurements M1001)
Dropped calls = calls which do not terminate due to one of the following reasons
Normal release
Relocation
Preemption
Possible causes for call drops are e.g.
Lack of coverage
Interference
SHO failure
Missing neighborRelocation failure
KPI constructioncall drop rate
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5/23/2018 KPI Definition
49/75
Soc Classification level
49 Nokia Siemens Networks RN31571EN30GLA0
E_UEIL_CS_VOICRAB_ACT_FAE_RNCIL_CS_VOICRAB_ACT_FA
E_IURIL_CS_VOICRAB_ACT_FAE_BTSIL_CS_VOICRAB_ACT_FA
E_RADIOIL_CS_VOICRAB_ACT_FAE_IUIL_CS_VOICRAB_ACT_FA
_GANHOL_CS_VOICERAB_ACT_RE_ISHOL_CS_VOICERAB_ACT_RE
_HHOL_CS_VOICERAB_ACT_RE
_P_EMPL_CS_VOICERAB_ACT_RE_SRNCL_CS_VOICERAB_ACT_RE
EMP_CS_VOICRAB_ACT_CO
E_UEIL_CS_VOICRAB_ACT_FAE_RNCIL_CS_VOICRAB_ACT_FA
E_IURIL_CS_VOICRAB_ACT_FAE_BTSIL_CS_VOICRAB_ACT_FA
E_RADIOIL_CS_VOICRAB_ACT_FAE_IUIL_CS_VOICRAB_ACT_FA
_P_EMPL_CS_VOICERAB_ACT_RE
CDR_voice
Call drop rate for voice
KPI considers cell where call terminates
Call might have been started in another cell
Preemption treated as drop, as user looses service
Normal release
Relocation / preemption
IFHO
ISHO to GSM / WLAN
Drops
Drops
Preemption
KPI constructioncall drop rate
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5/23/2018 KPI Definition
50/75
Soc Classification level
50 Nokia Siemens Networks RN31571EN30GLA0
Call drop rate for voice (example)
Typical target for voice call drop rate 0.5%
CS call drop rate usually lower than PS one due to larger cell range and
bigger SHO overhead
KPI constructioncall drop rate
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5/23/2018 KPI Definition
51/75
Soc Classification level
51 Nokia Siemens Networks RN31571EN30GLA0
Call drop rate for NRT
No preemption for NRT calls
No inter-RAT mobility considered for NRT callsKPI considers drop of active RAB only
If non active RAB drops, both standard failure counters andRAB_ACT_FAIL_PS_XX_PCH counters are updated
Normal release
Relocation
Drops
Drops interactive
G_UEIL_PS_BACKRAB_ACT_FAR_UEIL_PS_INTERAB_ACT_FA
G_RNCIL_PS_BACKRAB_ACT_FAR_RNCIL_PS_INTERAB_ACT_FA
G_IURIL_PS_BACKRAB_ACT_FAR_IURIL_PS_INTERAB_ACT_FA
G_BTSIL_PS_BACKRAB_ACT_FAR_BTSIL_PS_INTERAB_ACT_FA
G_RADIOIL_PS_BACKRAB_ACT_FAR_RADIOIL_PS_INTERAB_ACT_FA
G_IUIL_PS_BACKRAB_ACT_FAR_IUIL_PS_INTERAB_ACT_FA
_SRNCL_PS_BACKGRAB_ACT_RE_SRNCL_PS_INTERRAB_ACT_RE
GMP_PS_BACKRAB_ACT_CORMP_PS_INTERAB_ACT_CO
R_PCHIL_PS_INTERAB_ACT_FAG_PCHIL_PS_BACKRAB_ACT_FA
G_UEIL_PS_BACKRAB_ACT_FAG_RNCIL_PS_BACKRAB_ACT_FA
G_IURIL_PS_BACKRAB_ACT_FAG_BTSIL_PS_BACKRAB_ACT_FA
G_RADIOIL_PS_BACKRAB_ACT_FAG_IUIL_PS_BACKRAB_ACT_FAR_UEIL_PS_INTERAB_ACT_FAR_RNCIL_PS_INTERAB_ACT_FA
R_IURIL_PS_INTERAB_ACT_FAR_BTSIL_PS_INTERAB_ACT_FA
R_RADIOIL_PS_INTERAB_ACT_FAR_IUIL_PS_INTERAB_ACT_FA
CDR_NRT
Drops background
Drops n Cell/URA_PCH
KPI constructioncall drop rate
-
5/23/2018 KPI Definition
52/75
Soc Classification level
52 Nokia Siemens Networks RN31571EN30GLA0
Call drop rate for NRT (example)
Typical target for NRT call drop rate 2%
PS call drop rate usually higher than CS one due to higher RSCP
requirements and lower SHO overhead
KPI constructioncall drop rate
HSDPA t i bilit (t ffi t M1002)
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5/23/2018 KPI Definition
53/75
Soc Classification level
53 Nokia Siemens Networks RN31571EN30GLA0
o_failuresases_due_tHSDPA_relesPA_releasenormal_HSD
sPA_releasenormal_HSDion_SRHSDPA_sess
ion_SRHSDPA_sess1_rateHSDPA_drop
HSDPA retainability (traffic measurements M1002)
HSDPA retainability deals with transition from HS-DSCH to DCH or FACH,not with release of HS RAB
Causes for normal transitions areInactivity
Preemption
Mobility to non HS cell
If a failure occurs, the RNC tries to shift the user to Cell_FACH, i.e. to
keep the RRC and RAB connection runningHSDPA drop thus is soft drop
KPI constructioncall drop rate
HSDPA t i bilit
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5/23/2018 KPI Definition
54/75
Soc Classification level
54 Nokia Siemens Networks RN31571EN30GLA0
DSCH_BGRL_FAIL_HS_REL_ALLO_RDSCH_INTL_FAIL_HS_REL_ALLO_R
DSCH_BGRTH_FAIL_HSREL_ALLO_ODSCH_INTTH_FAIL_HSREL_ALLO_O
H_BGRORM_HS_DSCREL_ALLO_NH_INTORM_HS_DSCREL_ALLO_N
H_BGRORM_HS_DSCREL_ALLO_NH_INTORM_HS_DSCREL_ALLO_Nion_SRHSDPA_sess
HSDPA retainability
Two types of failure counter given only
Radio link failure
Other failure
An analogue KPI can be defined for streaming service
An analogue KPI for conversional service does not exist
KPI constructioncall drop rate
HSDPA t i bilit
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5/23/2018 KPI Definition
55/75
Soc Classification level
55 Nokia Siemens Networks RN31571EN30GLA0
HSDPA retainability
Typical target for HSDPA drop rate 1%
HSDPA usually more robust than R99 as more power available for
the radio link
KPI Definition
P i i l f 3G t k ti i ti
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5/23/2018 KPI Definition
56/75
Soc Classification level
56 Nokia Siemens Networks RN31571EN30GLA0
Principles of 3G network optimization
Principles of performance measurements and KPI classification
KPI construction- KPI Factors
- Access and setup
- Drop (Retainability)
-Mobility
-Throughput
KPI constructionSHO success rate
Definition SHO success rate (SHO measurements M1007)
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5/23/2018 KPI Definition
57/75
Soc Classification level
57 Nokia Siemens Networks RN31571EN30GLA0
UE
RRC: Measurement Report (Event 1A / 1B / 1C)
Setup phaseResource Reservation in RNC, BTS, Transmission
(only Event 1A / 1C)
RRC: Active Set Update
Access phaseRNC waits reply from UE
RRC: Active Set Update Complete
BTS RNC
Definition SHO success rate (SHO measurements M1007)
SHO success rate
KPI constructionSHO success rate
SHO success rate
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5/23/2018 KPI Definition
58/75
Soc Classification level
58 Nokia Siemens Networks RN31571EN30GLA0
_1ct_requestsreplacemensts_1bdrop_requeequests_1aaddition_r
t_updates_active_sesuccessful
s_rateSHO_succes
CELL A
CELL B
CELL C
SHO success rate
KPI checks reliability of SHO only
Problems like cell overlap or specific adjacencies discussed later
Attempt and success counted in all source cells
KPI constructionSHO success rate
SHO success rate
-
5/23/2018 KPI Definition
59/75
Soc Classification level
59 Nokia Siemens Networks RN31571EN30GLA0
FOR_NRTEQ_ON_SHO_CELL_DEL_R_FOR_NRTREQ_ON_SHOCELL_REPL_
FOR_NRTEQ_ON_SHO_CELL_ADD_RFOR_RTEQ_ON_SHO_CELL_DEL_R
_FOR_RTREQ_ON_SHOCELL_REPL_FOR_RTEQ_ON_SHO_CELL_ADD_R
FOR_NRTES_ON_SHO_SUCC_UPDATFOR_RTES_ON_SHO_SUCC_UPDATs_RateSHO_Succes
SHO success rate
Number of successful active set updates in comparison to initialaddition /deletion / replacement requests
Periodic reports are excluded (can occur e.g. in case of busy RNC not reactingimmediately to initial request)
KPI constructionSHO success rate
SHO success rate (example)
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5/23/2018 KPI Definition
60/75
Soc Classification level
60 Nokia Siemens Networks RN31571EN30GLA0
SHO success rate (example)
NRT
RT
Typical target for SHO success rate 95%
CS more robust against low coverage / quality at cell edge than PS
Therefore higher SHO success rate
KPI constructionISHO success rate
Definition ISHO success rate (ISHO measurements M1010)
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5/23/2018 KPI Definition
61/75
Soc Classification level
61 Nokia Siemens Networks RN31571EN30GLA0
UE
RRC: Measurement Report (Event 1F)
RRC: Physical Channel Reconfiguration
RRC: Physical Channel Reconfiguration Complete
BTS RNC
Definition ISHO success rate (ISHO measurements M1010)
ISHOsuccess
rate
UE put intocompressed mode
RRC: Measurement Control
RRC: Measurement ReportRxLev
measurements
RRC: Measurement Control
RRC: Measurement Report BSIC verification
MSC
RANAP Relocation required
RANAP Relocation command
RRC: HO from UTRAN Command
ISHOattempt
KPI constructionISHO success rate
ISHO success rate
-
5/23/2018 KPI Definition
62/75
Soc Classification level
62 Nokia Siemens Networks RN31571EN30GLA0
ISHO divided into two phases
Inter-system measurements
Inter-system handover execution
Attempt and success counted in all source cells
RT and NRT ISHO differ in nature
Counter and KPI are implemented separately for RT and NRT
In case of multi-RAB with at least one RT RAB counted as RT ISHO
ISHO may fail due to e.g.
Missing target cellTarget cell has not enough coverage
Target cell strongly interfered
Configuration problem
or_ISHOsattempts_f
_ISHOssuccessfulss_rateISHO_succe
ISHO success rate
KPI constructionISHO success rate
ISHO per trigger
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5/23/2018 KPI Definition
63/75
Soc Classification level
63 Nokia Siemens Networks RN31571EN30GLA0
S O pe t gge
Attempt and success not only counted per RT / NRT, but also per trigger
UL SIRTarget
UL UE power (event 6A)
DL RL power
CPICH RSCP (event 1F)
CPICH Ec/I0(event 1F)
IMSI based
Emergency call
Load based RTWP
Load based TCP
Load based HW / logical resources
Load based code resources
Services based
KPI constructionISHO success rate
ISHO success rate RT
-
5/23/2018 KPI Definition
64/75
Soc Classification level
64 Nokia Siemens Networks RN31571EN30GLA0
RTELL_BLOCK_ATT_ISHO_CWN_RTELL_SHUTDOATT_ISHO_C
AMR_RTATT_GANHO_S_RT_UL_DCH_WPIS_HHO_ATT
_SB_RTIS_HHO_ATTC_RT_LB_RSVR_SIS_HHO_ATT
M_RT_LB_RES_LIIS_HHO_ATTT_RT_LB_PTX_TOIS_HHO_ATT
T_RT_LB_PRX_T OIS_HHO_ATTL_RT_LB_CAPA_UIS_HHO_ATT
L_RT_LB_CAPA_DIS_HHO_ATTL_EMERG_CALIS_HHO_ATT
_IM_IMS_RTIS_HHO_ATTO_RT_CPICH_ECNIS_HHO_ATT
P_RT_CPICH_RSCIS_HHO_ATTRT_DPCH_PWR_IS_HHO_ATT
R_RT_UE_TRX_PWIS_HHO_ATTRT_UL_DCH_Q_IS_HHO_ATT
_RTCELL_BLOCKSUCC_ISHO_OWN_RTCELL_SHUTDSUCC_ISHO_
_AMR_RTSUCC_GANHOO_WPS_RTSUCC_IS_HH
O_SB_RTSUCC_IS_HHSC_RTO_LB_RSVR_SUCC_IS_HH
IM_RTO_LB_RES_LSUCC_IS_HHOT_RTO_LB_PTX_TSUCC_IS_HH
OT_RTO_LB_PRX_TSUCC_IS_HHUL_RTO_LB_CAPA_SUCC_IS_HH
DL_RTO_LB_CAPA_SUCC_IS_HHLLO_EMERG_CASUCC_IS_HHTO_IM_IMS_RSUCC_IS_HHNO_RTO_CPICH_ECSUCC_IS_HH
CP_RTO_CPICH_RSSUCC_IS_HHPWR_RTO_DL_DPCH_SUCC_IS_HH
WR_RTO_UE_TRX_PSUCC_IS_HH_RTO_UL_DCH_QSUCC_IS_HH
ss_RTISHO_Succe
Analogue for NRT
For NRT no ISHO of emergency call, of WPS user and no ISHO to GAN
Attempt counter updated, ifmeasurements successful, i.eGSM cell with sufficient RxLevand readable BSIC available
Success counter updated, ifrelocation from RNC to BSCsuccessful
KPI constructionISHO success rate
ISHO success rate (example)
-
5/23/2018 KPI Definition
65/75
Soc Classification level
65 Nokia Siemens Networks RN31571EN30GLA0
NRT
RT
( p )
Typical target for ISHO success rate 90%/80% for RT/NRT
CS more robust against low coverage / quality at cell edge than PS
Therefore higher ISHO success rate
KPI constructionserving cell change success rate
Definition SCC success rate (intra-system HHO measurements M1008)
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5/23/2018 KPI Definition
66/75
Soc Classification level
66 Nokia Siemens Networks RN31571EN30GLA0
UE
RRC: Measurement Report (e.g. Ec/Io)
NBAP Radio Link Reconfiguration Procedure
BTSSource
BTSTarget
SCC
successrate
RRC: Radio Bearer Reconfiguration
RNC
NBAP Radio LinkReconfiguration
Procedure
RRC: Radio Bearer Reconfiguration Complete
Setup phaseResource Reservation in RNC, BTS, Transmission
Access phaseRNC waits reply from UE
KPI constructionserving cell change success rate
Definition SCC success rate (intra-system HHO measurements M1008)
-
5/23/2018 KPI Definition
67/75
Soc Classification level
67 Nokia Siemens Networks RN31571EN30GLA0
ASOND_OTHER_RESCC_STARTEET_UPDD_ACTIVE_SSCC_STARTE
RRORD_UL_SIR_ESCC_STARTENOD_CPICH_ECSCC_STARTE
SFULBTS_SUCCESSCC_INTER_SFULBTS_SUCCESSCC_INTRA_s_rateSCC_succes
Attempt counted per trigger in source cell
CPICH Ec/I0
UL SIR error
Active set update
Other reason
Success counted in target cell
Intra BTS target
Inter BTS target (data in source BTS buffer lost)
KPI constructionserving cell change success rate
SCC success rate (example)
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5/23/2018 KPI Definition
68/75
Soc Classification level
68 Nokia Siemens Networks RN31571EN30GLA0
Typical target for serving cell change success rate 95%
KPI Deifnition
Principles of 3G network optimization
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5/23/2018 KPI Definition
69/75
Soc Classification level
69 Nokia Siemens Networks RN31571EN30GLA0
Principles of performance measurements and KPI classification
KPI construction
- KPI Factors
- Access and setup
- Drop (Retainability)
-Mobility
-Throughput
KPI constructioncell throughput
R99 throughput sent / received by RNC on DL / UL per cell
-
5/23/2018 KPI Definition
70/75
Soc Classification level
70 Nokia Siemens Networks RN31571EN30GLA0
60ATIONPERIOD_DUR10008_DATA_VOLNRT_DCH_DLRNCatThroughputAveraged-MACDLNRTR99
(cell throughput measurements M1023)
Transmission of MAC-d PDUs over DCH
Counter give data volume in byte
KPI give throughput in Kbit/s
60ATIONPERIOD_DUR1000
8_DATA_VOLNRT_DCH_ULRNCatThroughputAveraged-MACULNRTR99
KPI constructioncell throughput
HSPA throughput sent / received by RNC on DL / UL per cell
-
5/23/2018 KPI Definition
71/75
Soc Classification level
71 Nokia Siemens Networks RN31571EN30GLA0
60ATIONPERIOD_DUR10008TA_VOLHS_DSCH_DARNCatThroughputAveraged-MACHSDPA
(cell throughput measurements M1023)
Transmission of MAC-d / MAC-es PDUs over HS-DSCH / E-DCH
Counter give data volume in byte
KPI give throughput in Kbit/s
60ATIONPERIOD_DUR1000
8TA_VOLSDPA_UL_DANRT_EDCH_HRNCatThroughputAveragees-MACHSUPA
KPI constructionBTS throughput
HSDPA throughput arriving at / transmitted by BTS
-
5/23/2018 KPI Definition
72/75
Soc Classification level
72 Nokia Siemens Networks RN31571EN30GLA0
60ATIONPERIOD_DUR1000SS_MACD_BITRECEIVED_HhroughputArriving_t
(HSPA in BTS measurements M5000)
60ATIONPERIOD_DUR1000
BITSD_HS_MACD_-DISCARDESS_MACD_BITRECEIVED_Hutd_throughpTransmitte
Arrival and transmission of MAC-d PDUs over HS-DSCH
Counter gives data volume in Kbit
KPI give throughput in Mbit/s Discarded due to buffer overflow
KPI constructionlayer 1 re-transmission
Transmission rate (HSPA in BTS measurements M5000)
-
5/23/2018 KPI Definition
73/75
Soc Classification level
73 Nokia Siemens Networks RN31571EN30GLA0
sd_MACd_PDUtransmittenumber_of_
ionsetransmissy_with_n_rd_correctls_deliveref_MACd_PDU1)number_o(n
on_rateTransmissi n
Example
100 PDUs with no re-transmission
16 PDUs with 1 re-transmission
3 PDUs with 2 re-transmissions
1 PDU with 3 re-transmissions
Transmission rate = (100 * 1 + 16 * 2 + 3 * 3 + 1 * 4) / (100 + 16 + 3 + 1)
Transmission rate = 145 / 120 = 1.21
1.21 transmissions over the air for 1 PDU 21% re-transmission overhead
KPI constructionlayer 1 re-transmission
Transmission rate
-
5/23/2018 KPI Definition
74/75
Soc Classification level
74 Nokia Siemens Networks RN31571EN30GLA0
QAM_CODE_RETRANS_.. .QAM_CODE_RETRANS_
QAM_CODE_RETRANS_.. .QAM_CODE_RETRANS_
_CODE_QPSKRETRANS_..._CODE_QPSKRETRANS_
QAM_CODE__ORIG_TRANS.. .QAM_CODE__ORIG_TRANS
QAM_CODE__ORIG_TRANS.. .QAM_CODE__ORIG_TRANS
_CODE_QPSK_ORIG_TRANS.. ._CODE_QPSK_ORIG_TRANS
_CL__RETR_DISTMAC_HS_PDU_CL__RETR_DISTMAC_HS_PDU
_CL__RETR_DISTMAC_HS_PDU_CL__RETR_DISTMAC_HS_PDU
_CL__RETR_DISTMAC_HS_PDU_CL__RETR_DISTMAC_HS_PDU
on_rateTransmissi
64156410
1615161
151
64156410
1615161
151
54
32
10
CL 0 = Number of packets with ACK immediately
CL 1..5 Number of packets with ACK after 1..5 re-transmissions
ORIGTRANS = number of packets with original data per number
of codes and modulation
RETRANS = number of packets with re-transmitted data pernumber of codes and modulation
KPI constructionlayer 1 re-transmission
Re-transmission overhead (example)
-
5/23/2018 KPI Definition
75/75
Soc Classification level
75 Nokia Siemens Networks RN31571EN30GLA0
Typical target for re-transmission overhead 10%
Too high or too low re-transmissions reduce system capacity