NokiaEDU OSS aspects principles LTE Counters and KPI [FL16A/TL16A] RA4133-16A Module 1
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Course Objectives OSS aspects After completing this learning element, the participant will be able to:
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Explain the principles of measurement activation, with available and applicable settings
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List the KPI’s available to evaluate the different phases (setup, access, active (Mobility/HO))
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Describe of PM counters and KPI’s
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OSS Aspects
• Performance measurements within OSS hierarchy • Performance measurement activation and architecture • PM files structure
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LTE Measurement Hierarchy OSS Nokia/NetAct implementation within LTE NetAct managed RRM/field counters, phases, and KPIs to detect faults and ensures QoS requirements at all layers
Other ACCESS Technologies NETACT/ Nokia counters/KPI Diagnostics at OSS/PLMN layer
• PLMN level
SAE GW
OSS level
• Mobility Management Entity (MME) • S1/X2 • eNB level • Cell level
Radio, transmission monitoring
Probing and drive test is based on trouble shooting at single eNB/cell area.
S1 S1 S1 S1
Probing at eNBs
X2 X2
Drive test Radio measurements only at cell layer
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LTE Performance Measurements Grouped reporting Radio Access counters and their KPI's
Group 8xxx
SAE GW M 8001 M 8004 M 8011 M 8012 M 8018 M 8035
M 8036 M 8037 M 8046 M 8047
M 8006 M 8007 M 8008 M 8013 Access/drop
MME
Load measurements
S1 signaling
eNB
eNB
LTE Cell`s
M 8009 M 8013 M 8014 M 8015 M 8016 M 8017 M 8019
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M 8021 M 8025 M 8027 M 8033 M8042
Air interface QoS
Mobility/HO
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M 8005 M 8010 M 8023 M 8026 M 8031 M 8052 M 8054 M 8056
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LTE Performance Measurements Group of M8xxx counters cell level & traffic A-GPS Server Interface
SAE GW GPS
Traffic
Traffic
Traffic
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X2
M 8001 Cell Load packet scheduling related measurements
cell
M 8012 PDCP/RLC/MAC Cell throughput M 8011 PRB per TTI
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cell cell
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LTE Performance Measurements Group of M8xxx counters eNode B QoS, HO, air interface, field, traffic SAE GW
M 8014 X2/S1/ Inter BTS HO Traffic QoS
Field measurements
M 8018 UE per eNB load
X2
M 8010 CQI eNB DL air interface
M 8009 intra BTS HO
M 8005 SINR / RSSI UL measurement M 8031 SINR DL
cell cell cell
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M 8015 X2/RAN HO for each adjacency
LTE Performance Measurements Group of M8xxx counters access, Retainability SAE GW
eRAB Access
M 8006 EPS Bearer setup/release/drop
RAN Access
M 8027 RLF trigger
M 8013 S1 setup/release
M 8014 X2/RAN Inter BTS HO
X2
RAN RB drop RAN setup access drop
M 8007 SRB/DRB setup/release/drop M 8008 RRC
cell cell cell
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M 8009 RAN intra BTS HO
LTE Performance Measurements Group of M8xxx counters at RAN, MME, traffic, states SAE GW GPS
M 8013 RAN/MME states/RRC/EMC
•LTE UE State measurement measures UE State Management
M 8004 Transport Load GTP-User plane Traffic M 8004 Transport Load GTP-User plane
Transport Load measured at GTP-U protocol X2
cell M 8012 Cell Throughput
cell cell
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OSS Monitoring Example KPIs based on LTE EPS Bearer measurements (M8006)
LTE_5017a
E-UTRAN E-RAB Setup Success Ratio
LTE_5086b
E-UTRAN E-RAB Setup Failure Ratio due to radio network layer failure (RNL) cause – Radio Connection with UE lost
LTE_5087b
E-UTRAN E-RAB Setup Failure Ratio per Cause TRPORT
LTE_5088c
E-UTRAN E-RAB Setup Failure Ratio per Cause RESOUR
LTE_5089b
E-UTRAN E-RAB Setup Failure Ratio per Cause OTH
LTE_5023g
E-UTRAN E-RAB Normal Release Ratio User Perspective
LTE_5024g
E-UTRAN E-RAB Normal Release Ratio RAN View
LTE_5025g
E-UTRAN E-RAB Drop Ratio, RAN View
LTE_5090e
E-UTRAN E-RAB Drop Ratio per Cause RNL
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OSS Aspects
• Performance measurements within OSS hierarchy • Performance measurement activation and architecture • PM files structure
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Performance Management Architecture Overview • Groups of counters activated/deactivated within Flexi Multiradio BTS with NetAct tools. • The measurement interval is configurable to 15, 30 or 60 minutes or 6, 12, or 24 hours. • The upload interval is configurable (15, 30 or 60 min) • When the reporting interval expires a notification is sent to NetAct indicating that on or more PM files are ready for transfer
NetAct Reporting Suite (RS)
BTS Site manager Administration of Measurements (AoM)
Upload notification
Flexi Multiradio BTS
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Network Performance Manager (NPM)
iOMS
Configuration file (Measurement activation)
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PM
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Measurement collection
Upload PM-report file
storage
PM
PM Data Structure - Operator is able to activate different measurement types (group of logically related PMcounters) per Flexi Multiradio BTS
Measurement type Z
PM-report file
- One file per measurement type per granularity period is created
Measurement type X
- Each PM-report file is stored for 24 hours before being deleted
Measurement type Y
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merged
- After expiry of the upload interval all measurement type files are merged into a single PM-report file which is uploaded to NMS
Performance management counter data flow parametrization Also optimizer, cell outage detection, SON, etc. iOMS Northbound IF
Southbound IF
collected xml
multiple xml eNB
/tmp
NetAct
Oracle DB (parsing: kpireporter)
PostgreSQL – DB (cross-platform)
OR 3rd party sw (data warehouse + analysis) through “measurement data export” interface
Kpireporter (Custom SQL queries)
Reporting Suite Network Performance Manager KPI reports
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Aggregation levels and reporting – example Reporting Suite output Export to excel
• Aggregation levels and reporting – exemplary Reporting Suite output Report name
Content of the report grouped into functional areas
Period of the measurement report
Filtered and aggregated report for the selected object
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OSS Aspects
• Performance measurements within OSS hierarchy • Performance measurement activation and architecture • PM files structure
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PM File Examples
LNCEL name calculation LNCEL – XY = LNCEL -< btsId x 256 + lcrId >
btsId = 11 (LNBTS – btsId == LNBTS- 11) lcrId = 1 XY= 11 x 256 +1 = 2816 + 1 = 2817 => LNCEL-2817
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