Huawei
eRAN KPI introduction (eRAN 6.0)
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Contents
1. KPI System Overview
2. KPI Detail Description
3. Recommended KPIs
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1. KPI System Overview
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KPI System Overview
Radio Network KPI :
Service KPI :
Focus on the radio
network performance
Focus on the user
experience
LTE KPIs
Accessability Retainability
Mobility
Availability
Utilization
Traffic
Latency
Integrity
•RRC SETUP
SR
•HHO SR (
Intra/Inter
Frequency
)
•Radio
Network
Unavailabi
lity Rate
•UL/DL
RB
Utility
Rate
•Cell UL/DL
Traffic
Volume
•Access
Latency
•Service
UL/DL
Throughput
•ERAB
Setup SR
(VoIP/ALL)
•Call Setup
SR
(VoIP/ALL)
•Call Drop
Rate
(VoIP/ALL)
•Call Setup
Complete
Rate
(VoIP/ALL)
•HO in SR
•Inter-RAT
HHO SR
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•Radio
Bearer
Number
•Service
Latency
•Interrupt
Latency
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KPI Attained Approach
o
In general, there are two approaches to define/attain KPIs:

By statistics /Counter:
Most of KPIs are attained by this approach, such as RRC Success Rate, HHO

Success Rate…
By drive test / Stationary test:
Some KPIs should be attained by drive test, such as Attach Latency, Handover
late cy…
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Measurement Object for Counter
o
Each measurement result is related to a specific measurement object.
o
Counters are organized by Measurement Unit/Family.
Measurement Object
Measurement
Family 1
Measurement
Measurement
Unit 1
Unit 2
Counter 1 Counter 2
Counter 3
Counter 4
……
Measurement
……
Family 2
Counter 5
Counter 6 Counter 7
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……
……
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Collection Method and Reporting Period
o
Collection methods (TS 32.403)



CC (Cumulative Counter), for example, Attempted RRC connection establishments;
GAUGE (dynamic variable), used when data being measured can vary up or down
during the period of measurement, for example, Maximum E-RAB Setup time;
DER (Discrete Event Registration), when data related to a particular event are
captured every nth event is registered, where n can be 1 or larger, for example,

o
Cell Unavailable Time, Mean E-RAB Setup time;
SI (Status Inspection), for example, Average Number of simultaneous E-RABs;
Reporting period

The measurement results are collected in a pre-defined reporting period, and this
reporting period, in general, is configurable at EMS, for example, 15mins,
60 i s…
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2. KPI Detail Description
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KPI Detail Description
o
Accessibility
o
Retainability
o
Mobility
o
Availability
o
Utilization
o
Traffic
o
Integrity
o
Latency
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Accessibility (1) – RRC Setup Success Rate
o
RRC Setup Success Rate (service)
The RRC setup procedure is trigged by different reasons as identified by the
establishmentCause field in the RRCConnctionRequest message: emergency,
highPriorityAccess, mt-Access, mo-Signaling, mo-Data, delayTolerantAccess-v1020.
The UE sets the establishmentCause and received by eNodeB. Causes except moSignaling are categorized as service related ones, and the cause of mo-Signaling is
categorized as signal related ones.
This KPI evaluates the RRC setup success rate with service related causes in a cell or
cluster.
RRC _ SSRService 
o
RRC _ Connection Success service
100%
RRC _ Connection Attempt service
RRC Setup Success Rate (Signal)
This KPI evaluates the RRC setup success rate with signal
related causes (mo-Signalling) in a cell or cluster.
RRC _ SSRSignal 
RRC _ Connection Success Signal
RRC _ Connection Attempt Signal
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100%
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Accessibility (2) – Counter Mapping for
RRC SSR
L.RRC.ConnReq.Att…
L.RRC.ConnReq.Succ …
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Accessibility (3) – QCI Definition
o
LTE-SAE QoS Class Identifier
There are 9 QCIs defined in 3GPP TS 23.203. Each of QCI has its QoS
requirements, and each E-RAB will has the attribute of QCI.
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Accessibility (4) – ERAB Setup Success Rate
o
VoIP ERAB Setup Success Rate
This KPI can be used to evaluate the ERAB setup
success rate of VoIP service (QCI 1 service) in a
cell or cluster.
VoIP _ ERAB _ SSR 
o
VoIP _ ERAB _ SetupSuccess
100%
VoIP _ ERAB _ SetupAttempt
ERAB Setup Success Rate (All)
This KPI can be used to evaluate the ERAB setup
success rate of all services including the VoIP
service in a cell or a cluster.
ERAB _ SSR( ALL) 
ERAB _ SetupSuccess
100%
ERAB _ SetupAttempt
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Accessibility (5) – Counter Mapping for
ERAB SSR
ERAB Setup Attempt Counters
ERAB Setup Attempt Counters
ERAB Setup Success Counters
ERAB Setup Success Counters
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Accessibility (6) – Call Setup Success Rate
o
VoIP Call Setup Success Rate (VoIP CSSR)
This KPI evaluates the success rate of the whole setup procedure for VoIP service (QCI
1 service) in a cell or cluster, which mainly includes three phases : RRC setup phase, S1
Signaling connection establishment phase and VoIP E-RAB setup phase:
VoIP _ CSSR 
o
RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess VoIP _ ERAB _ SetupSuccess
100%
*
*
RRC _ ConnectionAttemptService S1SIGConnectionEstablishAttempt VoIP _ ERAB _ SetupAttempt
Call Setup Success Rate (ALL)
This KPI can be used to evaluate the call setup success rate of all services including
the VoIP service in a cell or a cluster. This KPI mainly includes three phases : RRC
setup phase, S1 Signaling connection establishment phase and service E-RAB setup
phase:
CSSR( ALL) 
RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess ERAB _ SetupSuccess
*
*
100%
RRC _ ConnectionAttemptService S1SIGConnectionEstablishAttempt ERAB _ SetupAttempt
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Accessibility (7) – Counter Mapping for CSSR
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Retainability (1) – Call Drop Rate
o
VoIP Call Drop Rate
This KPI can be used to evaluate the call drop rate of VoIP service (QCI 1 service) in a cell
or cluster, the call drops happen when eNode initiate active ERAB (with data in buffer)
release process by E-RAB Release Indication or UE Context Release Request message with
Cause field with abnormal reasons (the cause other than : Normal Release, Detach,User
Inactivity, cs fallback triggered, UE Not Available For PS Service,or Inter-RAT redirection),
and all of the other E-RAB releases are consider as normal E-RAB release.
VoIP _ CDR 
VoIP _ ERAB _ Abnormal Re lease
100%
VoIP _ ERAB _ Re lease
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Retainability (1) – Call Drop Rate
o
Call Drop Rate(ALL)
This KPI can be used to evaluate the call drop rate of all services in a cell or a cluster,
including VoIP service.
CDR( ALL) 
o
ERAB _ Abnormal Re lease
100%
ERAB _ Re lease
Call Drop Rate(Always Online)
This KPI can be used to evaluate the call drop rate of all the services, including the VoIP
services, when the always online state is active. In always online state, the E-RAB
number of UE entering the un-synchronous state from synchronous state will be
considered for the KPI calculating.
AlwaysOnline _ CDR 
ERABAbnormalReleaseOfAlwaysOnline
100%
ERAB Re leaseOfAlwaysOnline
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Retainability (2) – Counter Mapping for Call
Drop Rate
Normal and Abnormal
release Counters based on
the cause
Normal and Abnormal
release Counters based on
the cause
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Retainability (3) - Call Setup Complete Rate
o
VoIP Call Setup Complete Rate (VoIP CSTR)
This KPI evaluates the call Setup Complete Rate for VoIP service (QCI 1 service) in a cell
or cluster, which means the rate of the VoIP service can be normally terminated once
user do the attempt to setup the service. And it can include 4 phases: RRC setup phase,
S1 Signaling connection establishment phase, VoIP E-RAB setup phase and VoIP service
E-RAB release phase;
VoIP _ CSTR 
o
RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess VoIP _ ERAB _ SetupSuccess VoIP _ ERAB _ Normal Re lease
100%
*
*
*
RRC _ ConnectionAttemptService S1SIGConnectionEstablishAttempt VoIP _ ERAB _ SetupAttempt
VoIP _ ERAB _ Re lease
Call Setup Complete Rate (ALL)
The similar as upper KPI, this KPI will evaluate the success rate in totally for 4 phases:
RRC setup phase, S1 Signaling connection establishment phase, service E-RAB setup
phase and service E-RAB release phase;
CSTR( ALL) 
RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess ERAB _ SetupSuccess ERAB _ Normal Re lease
*
*
*
100%
RRC _ ConnectionAttemptService S1SIGConnectionEstablishAttempt ERAB _ SetupAttempt
ERAB _ Re lease
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Retainability (3) - Call Setup Complete Rate
o
Call Setup Complete Rate (Always Online)
The similar as upper KPI, this KPI will evaluate the success rate in totally for 4
phases: RRC setup phase, S1 Signaling connection establishment phase,
service E-RAB setup phase and service E-RAB release phase (when the always
online state is active);
CSTR( AlwaysOnline) 
RRC _ ConnectionSuccessService S1SIGConnectionEstablishSuccess ERAB _ SetupSuccess ERABAbnormalReleaseOfAlwaysOnline
*
*
*
100%
RRC _ ConnectionAttemptService S1SIGConnectionEstablishAttempt ERAB _ SetupAttempt
ERAB Re leaseOfAlwaysOnline
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Retainability (4) - Counter Mapping for
CSCR
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Mobility (1) – Intra-LTE Handover (Out)
Success Rate
o
Intra-frequency Handover Out Success Rate
This KPI can be used to evaluate the intra-frequency
handover out success rate in a cell or cluster.
IntraF _ HOOut _ SR 
o
IntraF _ HOOutSuccess
100%
IntraF _ HOOutAttem pt
Inter-frequency Handover Out Success Rate
This KPI can be used to evaluate the inter-frequency
handover out success rate in a cell or cluster.
InterF _ HOOut _ SR 
InterF _ HOOutSuccess
100%
InterF _ HOOutAttem pt
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Mobility (2) – Counter Mapping for
Intra-LTE HO SR
Handover Attempt
Counters
Handover Success
Counters
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Mobility (3) - Intra-LTE Handover In
Success Rate
o
Handover In Success Rate
This KPI can be used to evaluate the handover
in success rate in a cell or cluster.
HOIn _ SR 
HOInSuccess
100%
HOInAttempt
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Mobility (4) - Counter Mapping for
Intra-LTE HO In SR
HO in Attempt
Counters
HO in Success
Counters
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Mobility (5) – Inter-RAT Handover
Success Rate
Inter-RAT Handover Success Rate (LTE to WCDMA)
o
This KPI can be used to evaluate the inter-RAT handover
success rate from LTE to WCDMA in a cluster.
IRATHO _ L2W _ SRout 
o
IRATHO _ L2W _ SuccessOut
100%
IRATHO _ L2W _ AttemptOut
Inter-RAT Handover Success Rate (LTE to GERAN)
This KPI can be used to evaluate the inter-RAT handover success rate from LTE to GERAN
in a cluster.
IRATHO _ L2G _ SRout 
IRATHO _ L2G _ SuccessOut
100%
IRATHO _ L2G _ AttemptOut
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Mobility (6) – Inter-RAT Handover
Success Rate
o
Inter-RAT Handover Success Rate (LTE to CDMA2000)
This KPI can be used to evaluate the inter-RAT handover success rate from LTE to
CDMA2000 in a cluster.
IRATHO _ L2C _ SRout 
IRATHO _ L2C _ SuccessOut
100%
IRATHO _ L2C _ AttemptOut
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Mobility (7) – Counter Mapping for
Inter-RAT HO SR
B point , HO attempt, and
distinguish the target system by
a ele e t targetRAT-Type i
the message
C point, HO
Success
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Availability (1) - Radio Network
Unavailability Rate
o
Radio Network Unavailability Rate
This KPI provides the percentage of time that a cell is unavailable in order to evaluate
the degradation of the network performance caused by the unavailable cells. It is
calculated based on the time of all cell unavailability in the radio network (cluster).
Where the {SP} denotes the reports period of counters, and the unit is minutes.
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Availability (2) – Counter Mapping for RAN
Unavailability Rate
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Utilization (1) – DL/UL RB Utility Rate
o
Downlink Resource Block Utility Rate
This KPI evaluates the DL RB (Resource Block) utility rate of a cell or cluster.
DLRB _ UtilityRat e 
o
DLRB _ Used
100%
DLRB _ Available
Uplink Resource Block Utility Rate
This KPI evaluates the UL RB (Resource Block) utility rate of a cell or cluster.
ULRB _ UtilityRat e 
ULRB _ Used
100%
ULRB _ Available
The ULRB_Available and DLRB_Available are fix values, which can be calculated by
system bandwidth.
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Utilization (2) – Counter Mapping for RB
Utility Rate
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Utilization (3) – Average CPU Load
o
Average CPU Load
This KPI is used to evaluate the CPU usage in busy hours. It indicates the system
loading. The CPU load is calculated by averaging the CPU usage ratio in the
measurement period.
MeanCPUUtility
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Utilization (4) – Counter Mapping for
Average CPU Load
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Traffic (1) – Active Users
o
Active Users
This group of KPIs consist of 6 KPIs, which are used to evaluate the user numbers which
has the RRC connection in the cell, the user numbers with uplink data in the buffer or
with downlink data in the buffer, and also give the average user number and maximum
user number in a cell or cluster.
AvgUserNumber
MaxUserNumber
AvgUserNumber _ DLData
MaxUserNumber _ DLData
AvgUserNumber _ ULData
MaxUserNumber _ ULData
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Traffic (2) – Counter Mapping for Active
Users
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Traffic (3) – Counter Mapping for Active
Users
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Traffic (4) – Counter Mapping for Active
Users
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Traffic (5) – Radio Bearers
o
Radio Bearers
The radio bearers KPIs consist of ten sub-KPIs, one is for the total of radio bearers and
the other nine are for nine QCIs. This set of KPIs can be used to evaluate the average
radio bearers in a cell or a cluster. The radio bearer for each QCI is based on the number
of active RRC connections for each QCI according to the QCI defined in the QoS
information.
RadioBearers
RadioBeare rs _ QCI _ 1
……
RadioBeare rs _ QCI _ 9
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Traffic (6) – Counter Mapping for Radio
Bearers
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Traffic (7) - Traffic Volume
Downlink Traffic Volume
o
Similar to the radio bearers KPIs, the downlink traffic volume KPIs consist of ten subKPIs, one is for the total of traffic volume for DRBs and the other nine are for nine QCIs.
This group of KPIs can be used to evaluate the DL traffic volume in a cell, which is
measured at the PDCP layer excluding the PDCP header
DLTrafficVolume
o
DLTrafficVolume _ QCI _1
……
DLTrafficVolume _ QCI _ 9
Uplink Traffic Volume
Similar to the downlink traffic volume KPIs, the uplink traffic volume KPIs consist of ten
sub-KPIs, one is for the total of traffic volume for DRBs and the other nine are for nine
QCIs. This group of KPIs can be used to evaluate the uplink traffic volume in a cell. The
KPIs are measured at the PDCP layer excluding the PDCP header.
ULTrafficVolume
ULTrafficVolume _ QCI _ 1
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ULTrafficVolume _ QCI _ 9
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Traffic (8) - Counter Mapping for Traffic
Volume
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Traffic (9) - Counter Mapping for Traffic
Volume
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Service Integrity (1) – Service Average
Throughput
o
Service Downlink Average Throughput
This KPI consist of nine sub-KPIs mapped into nine QCIs (QCI 1~9), they evaluate the
downlink throughput of a service with a specific QCI per user in each cell, it reflects the
end-user experience.
DLAverageThroughput _ QCI _ 1
……
DLAverageThroughput _ QCI _ 9
The total downlink traffic volume at PDCP layer of each QCI and total duration for
transmitting them are measured within a measurement period. Then the average
throughput of each QCI is obtained at the end of the measurement period.
o
Service Uplink Average Throughput
Same with the service downlink average throughput, this set of KPIs consist of nine
sub-KPIs mapped into nine QCIs (QCI 1~9), and the meaning is also similar with it.
ULAverageThroughput _ QCI _ 1 ……
ULAverageThroughput _ QCI _ 9
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Service Integrity (2) – Cell Average
Throughput
o
Cell Downlink Average Throughput
This KPI evaluates the cell downlink average throughput when there are data transferring
at downlink. It reflects the cell capacity.
The total downlink traffic volume at PDCP layer of cell and total duration for transmitting
which is measured within a measurement period. Then the average throughput of cell is
obtained at the end of the measurement period.
CellDLAveThp 
o
CellDLTrafficVolume
CellDLTransferTime
Cell Uplink Average Throughput
Same with the cell downlink average throughput, this set of KPI reflects the cell
capacity, and the meaning is also similar with it.
CellULAveThp 
CellULTrafficVolume
CellULTransferTime
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Service Integrity (3) – Cell Maximum
Throughput
o
Cell Downlink Maximum Throughput
This KPI evaluates the cell downlink maximum throughput when there are data
transferring at downlink. It reflects the cell capacity. It is calculated based on maximum
value of downlink traffic volume which are transferred at each second.
CellDLMaxThp 
o
CellDLMaxTrafficVolumeforEach1s(bit )
1000(ms)
Cell Uplink Maximum Throughput
Same with the cell downlink maximum throughput. It is calculated based on maximum
value of downlink traffic volume which are transferred at each second.
CellULMaxThp 
CellULMaxTrafficVolumeforEach1s(bit )
1000(ms)
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Service Integrity (4) – Counter Mapping for
Service Average Throughput
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Service Integrity (5) – Measurement Principle for
Throughput
Refer to TS 32.450
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Service Integrity (6) – Counter Mapping for
Service Average Throughput
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Service Integrity (7) – Counter Mapping for Cell
Average Throughput
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Service Integrity (8) – Counter Mapping for Cell
Maximum Throughput
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Latency (1)
o
Access Latency
This grouped KPI can be used to evaluate the
latency of access phase.
o
AccessLatency_Attach
Defined as the duration from the time the UE
send AttachRequest message to the time the
UE send AttachComplete message message
o
AccessLatency_Idle2Active
Defined as the duration from (UE in idle mode)
the time the UE send RRCConnectionRequest
message to the time the UE send
RRCConnectionReconfiguration message
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Latency (2)
o
Service Latency
This grouped KPI can be used to evaluate the latency of a particular service, we can
distinguish them by different services, this KPI will be attained by drive test (or
stationary test).
ServiceLatency _ Ping _ 32bytes
ServiceLatency _ Ping _ 1460bytes
o
Control Plane HO Interrupt Latency
This grouped KPI can be used to evaluate the control plane interrupt latency during the
handover, we can further distinguish them by different handover scenarios.
This KPIs is measured through drive test. Defined as the duration from the time the UE
receives the handover command（RRCConnectionReconfiguration after
MeasurementReport) to the time the UE send the handover confirm message
(RRCConectionReconfigurationComplete) .
ControlPla ne _ Interrupt _ IntraLTE _ HO
ControlPla ne _ Interrupt _ IRATHO _ L2C
ControlPla ne _ Interrupt _ IRATHO _ L2W
ControlPla ne _ Interrupt _ IRATHO _ L2G
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Latency (3)
o
User Plane HO Interrupt Latency
This grouped KPI can be used to evaluate the
user plane interrupt latency during the
handover, we can further distinguish them by
different handover scenarios.
The user plane interrupt latency is different
when observed at different layers, for example,
UserPlane _ Interrupt _ IntraLTE _ HO
at IP layer or RLC layer or MAC layer.
UserPlane _ Interrupt _ IRATHO _ L2C
This KPIs is measured through drive test.
UserPlane _ Interrupt _ IRATHO _ L2W
Defined as the duration from the last RLC layer
UserPlane _ Interrupt _ IRATHO _ L2G
package received before the handover, to the
first RLC layer package received after handover.
It can be observed in Probe.
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3. Recommended KPI
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Recommended KPIs
o
The recommended KPIs at this phase include:
KPI Class
KPI Name
RRC Setup Success Rate (service)
Accessibility RRC Setup Success Rate (Signal)
ERAB Setup Success Rate (ALL)
Retainability Call Drop Rate (ALL)
Mobility
Intra-frequency Handover Out Success Rate
Radio Bearers for Total and QCI 1~9
Traffic
Downlink Traffic Volume for Total and QCI 1~9
Uplink Traffic Volume for Total and QCI 1~9
Integrity
Service Downlink Average Throughput for QCI 1~9
Service Downlink Average Throughput for QCI 1~9
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Performance Data Manager
The PRS is a platform used to manage mobile network performance reports
and analyze network performance.
(iManager PRS V100R006 Product Description V1.1)
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Customizing Reports
(iManager PRS V100R006 Product Description V1.1)
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Restrictions on Measurement Activations
o
The period of measurement on northbound
interface should be for 15mconsist with
southbound interface. So far, Huawei support
15minutes and 60minutes periods as default.
o
There is no restrictions on the number of NE
objects, measurement objects minutes and 60
minutes measurement periods. M2000 can
provide all measurement results of all
managed NEs via northbound performance
file interface.
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