Post on 26-Oct-2014
OSS-RC 5Radio Network Optimization
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Agenda
OSS-RC RNO Overview
RNO for WCDMAMRR-WNCS-W
NCS-GW
RNO for GSMMRR-G
NCS-G/NOXFAS/FOXSYROX
CCETET
OSS-RC RNO Summary
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Agenda
OSS-RC RNO Overview
RNO for WCDMAMRR-WNCS-W
NCS-GW
RNO for GSMMRR-G
NCS-G/NOXFAS/FOXSYROX
CCETET
OSS-RC RNO Summary
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Network Functionality - Summary
Functionality factor
1992 1998 2004 2010
Cost of Operation
Time
Network Functionality
O&M Cost
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Planning Tuning Troubleshooting
PMR
TETMRR (GSM & WCDMA)
FAS, FOXNCS (GSM & WCDMA), NOX
SYROXRNDBI
RNO
R-PMO, REDERPDBI
EBS (GSM, WCDMA, Core)EBA EventBased
Applications
GM LogGM Log
Business ObjectsENIQ
OSS RC Radio NW Monitoring & Optimization toolsTEM
S Visualization
RTTM
FFAX
CCE
CTR, CER
PMA UETR, GPEHCTR
MTR
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RNO Advantages! Centralized operation from the RNO GUI
– Recording, file collection & presentation– Seamless Operation for 2G/3G operators
! Measurements from a live network and real mobiles! Overview of a large number of cells! Timesaving compared to drive tests! Areas not accessible can be optimized
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Time savings in Radio Network Optimization ! Frequency optimization: Suggest
frequency changes for minimized interferenceTime saving ~ 95%
! Neighbor identification: to find potential neighbours to add and identify neighbours that can be removedTime saving ~ 99%
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Example 1 - Quality Improvements! 0.5% increased call set up success rate and 0.6% reduced call drop
rate in a city with 3000K subscribers leads to:! 1 440 000 USD yearly increased revenue
Network improvements give value
Example 2 – Optimization Neighbor relations! Drive testing in 2000 cells with measurements,
30 minutes per cell -> 1000 man hours! Comparable to a few hours of recording with NCS/NOX
complemented with STS statistics 0.5 man hours
Example 3 – Identification of interference in whole network! Whole network can be checked for abnormal interference in 2 hours! Example 4 – Optimization of interference and quality! Using Frequency Allocation Support FAS in a tuned quality network enabled
fast identification of interference sources and fine tuning activities resulting in e.g a 50% reduction of DL interference !
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Estimated downlink interference = ~ 50 %Measured uplink interference = ~ 7 %
Downlink Quality Triggered Handover = ~ 35 %Uplink Quality Triggered Handover = ~ 12 %Handover Fail = ~ 9 %Handover Drop = ~ 7 %
Low Quality drops – SDCCH = ~ 8 %Low Quality drops – TCH = ~ 9%Bad Quality Disconnection = ~ 11 %Bad SQI = ~ 3 %
Example 4 – Optimization of Interference and quality(Result from real optimization project during 2005)
The numbers indicate the improvement to a tuned network using RNO FAS measurements, ICDM and external cellplanning tools !!
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When can RNO be helpful?! Frequency Planning! Missing or too many neighbor relations! Catastrophy situations, fast re-optimization! Bad TCH or BCCH frequencies! No dominant server! External interference! Cell covers too much, wrong position, antenna direction! Swapped sectors! ACCMIN, MSRXMIN! Power control or HCS parameters! Bad speech quality! Competitor analysis, roaming performance strongest server! 2G/3G NCS-GW, find the best WCDMA neighbors! 3G NCS-W, handle and optimize WCDMA neighbors! 3G RES/MRR-W find cells with bad service quality! 3G RES/MRR-W find cells with UL or DL coverage problems
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RNO functionality summary! MRR-GSM - analyze radio characteristics, “Seamless Operation”! NCS/NOX GSM - find the best GSM neighbors! FAS/FOX GSM - find the best frequencies
– measurement of internal/ external interference– Create ICDM measurement
! SYROX - optimization of synchronized radio networks! CCE – Evaluating the competitor coverage compared to own! TET - find the best hot spot location! NCS-GW - find the best WCDMA neighbors in GSM! NCS-W – find the best WCDMA neighbors and maintain neighbor list! MRR-W Analysing coverage and quality, Seamless Operation! Complementary data sources for optimization are:
– Statistics and events provided by the features NWS/ENIQ, R-PMO, GPEH, etc...
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Installed baseNov. 2006 compared to Nov. 2007
178107WCDMA
474428GSM
20072006OSS Systems
MRR FAS
FOX
NCS
NOX
TET
SYRO
XNC
S-G
WNC
S-W
MRR
-W
0
10
20
30
40
50
60
70
80
Installed base RNO
nov-06
nov-07
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NCS-GW
MRR-GNCS-G
Radio Network Optimization GSM and WCDMA
FOX
FAS
SYROX
RNDBI
BRF
NCS-W MRR-WRNDBIRNDBI
RNDBI
GSM recording applicationGSM expert application
WCDMA recording applicationGSM-WCDMA recording application
CCE
NOX-G TETRNDBI
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RNO WCDMA - Common structure
RNC
RNO Applications
CS
Reports Export
Network data
Recording parameters
Recording definition
Measurement data
PMS
RBS
MRR-W NCS-W EBS-W
TSS
Authen-tication
PMS: Performance Management SubSystemCS: Configuration ServiceTSS: Telecom Security Services
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ReportsExport
BSC
RNO Applications
CNA SDM
Recording Definition
RecordingData
Counters
Networkupdate
Implemen-tation
DataCollection
Network data
CNAM
BSM
GNIP
TSS
Network data
Maps
Authentication
Supervision
RNO GSM - Common Structure
RBS
...
MRR NCS FAS ...
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BSC recording functions
Measurement Report
RIRUplink interference
BSC recording function
RNO Application in the OSS
MRR
BAR
MRR
TET
FOXFAS
NOXNCS
Measurement Result
Serving cell DL
Serving cell ULBSC
SYROX
Neighboring cell DL
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Agenda
RNO for GSMMRR-G
NCS-G/NOXFAS/FOXSYROX
CCETET
OSS-RC RNO Overview
OSS-RC RNO Summary
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When can MRR-G be helpful ?! Speech Quality! Traffic distribution! Power control! HCS parameters! Bad speech quality! Cell cover too much (non-urban area)! Signal levels! ...
What value doesMRR-G bring to you?
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Supervision
NetworkPerformance
Implementation
CNA
Verification
CompareRadio
Characteristicsbefore and after
change of parameters
Analysis
Signal QualitySignal StrengthMS Power level BTS Power Red.Timing AdvancePath Loss Diff.
Path loss
MRR Network Supervision
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MRR Overview Report
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MRR Overview Histogram
Signal strength
Path loss
Signal quality
MS power LevelBTS power reduction
Timing Advance
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! Recording thresholds can be specified when a new recording is defined
! The following thresholds are available:– RxQual– RxLev– TA– Path Loss Difference – FER– RxQual and RxLev– RxLev and TA– FER and RxLev– FER and TA
MRR Recording ParametersThresholds
! Available filters:– Full Rate – Enhanced Full Rate – Full Rate and Enhanced Full Rate – Half Rate – AMR Full Rate – AMR Half Rate – non-AMR Full Rate
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When can NCS/NOX be helpful ?
! Missing neighbor relations ! Too many neighbor relations! Find neighbour relations to new cells! Cell in wrong position or incorrect antenna direction! No dominant server! Cell covers too much/little! Allows fast re-configuration during catastrophy situations
– also FAS/FOX
What value doesNCS/NOX bring to you?
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NCS/NOX recording data
• BAR is used to find potential neighbors to add
• Handover statistics is used to find neighbors that can be removed
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BCCH 33BSIC 17
BAR - Active BA-list Recording
Serving Cell
BCCH 35BSIC 12
BCCH 37BSIC 23
UndefinedNeighbour Cell
Defined Neighbour Cells
Transmit Active BA-list(35, 37, 33)
Mobile listen for BCCH 35, 37, 33
BSCBSC
Test frequency
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NCS Cell Report
Reports above Rel. SS threshold
Handover statistics
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NCS Recording data
Recording thresholds
Test frequenciesCells to
include
Inter system neighbour relations
Export
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NOX functionality
! Gives recommendations on neighbors to add and remove
! Possibility to accept or reject some or all of the recommendations
! Automatic update of the network– NOX uses a CNA planned area– NOX schedules an update job
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When can FAS/FOX be helpful?! Bad BCCH/TCH frequency! External interference! Cell covers too much! Cell in wrong position! Wrong antenna direction! No dominant server (FAS/FOX, NSC-G )! FAS ICDM measurements as input to frequency planning! Catastrophy situations, fast re-optimization (NCS-G/NOX )
What value doesFAS/FOX bring to you?
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FAS Uplink Interference! All TRXs in the cell measures the uplink interference
repeatedly on test and configured frequencies! Use RIR function in the BSC
How to see uplink How to see uplink Interference?Interference?
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FAS Downlink Interference! Measurement Reports from MS on test and configured
frequencies are collected! An ICDM is created and PIT-values are calculated to give an
estimation of the downlink interference! The BAR function in BSC is used to create an ICDM
ICDM – Inter Cell Dependency MatrixPIT – Percentage Interfered Traffic
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FAS Cell Report example
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FOX - Frequency Optimization eXpert
RecordingRecording
Reallocation Algorithm
Reallocation Algorithm
Implemen-tation
Implemen-tation
Recommended Change Order
Recommended Change Order
CNACNA
RecommendationMode
FAS-recordingFAS-recording
AutomaticMode
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SYROX IntroductionSynchronized Radio Network Optimization Expert
! Provides an easy way to find and maintain parameter settings related to synthesized frequency hopping in a synchronized radio network
“Without SYROX this is a very complex task”
! Based on subscriber generated data! Integrated into RNO and dependant on FAS ICDM! Trials from real networks show a significant quality
improvement when there is high frequency load
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SYROX activities
ICDM
Cell & FreqInformationCNA/BRF
Sync Cluster
PrioritizedCells
SYROXalgorithmSYROXalgorithm
FAS
CNA orCNAI
SYROX recommendation:
MAIOHSN
FNOFFSETTSC
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SYROX recommendations
Recommended MAIO list
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When can CCE be helpful ?! Benchmarking activities to competitors
– Evaluate the coverage of radio access networks belonging to competitor operators
– Identify what is the average difference towards a competitor– Compare strengths and weaknesses between own and
competitor radio access networks
! Input to a churn rate improvement activity! Verify improvements to network after tuning activity! Help when planning expansion of the coverage
All without drive testing!
OSS-RC 5.2FAJ 121 1172, CCE
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Using CCE dataExample for management level reports
LoseSame312Arlanda Airport
SameSameLoseWinWin
Same
Trend year
Lose312Norrland
Win321E4 (road)
Trendmonth
CompetitorY rank
CompetitorX rank
OwnRankingCellset/Area
Lose123Lkpg+Nkpg (Cities)
Win231Skåne (region)
Same312Göteborg City
Same312Stockholm City
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Competitor coverage evaluation! Uses own terminals to measure on competitors.! Uses the Competitor Coverage Recording, CCR, in the BSC
(07B) ! The result is shown both as detailed reports as well as
higher level management reports that give answers on the following:
– What is the average difference towards a competitor?– Has the situation changed since last report period?– Has a network enhancements activity given wanted result?
! To get similar accuracy, numerous drive tests need to be performed.
! Measures up to 5000 cells
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Measurement Report
RIRUplink interference
BSC recording function
RNO Application in the OSS
MRRMeasurement Result
Serving cell DL
Neighbour cells DL
Serving cell UL
3G RBS
GSM BTS
BSC
TET
FOXFAS
NOXNCS
GWNCS
SYROX
MRR
CCE
BARGWBAR
CCR RECORDING
CCE built on RNO
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CCE - Overview report
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CCE - Cell Set Report
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CCE – Cell Report
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Competitor Frequencies Report
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CCE recording setup
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Operator Benefits
! Simple and reliable:– Very simple handling – anyone can do it– Real customers, real traffic– Fast: hours instead of weeks/months of drive testing
! Knowledge of competitive strengths and weaknesses in the radio access network
! Ability to focus resources (CAPEX or staff) where they make the most impact
– addressing churn and quality issues
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TET Usage
! Estimate:– How much traffic a new cell would take– Quantify off-load in the surrounding cells
The tool is intended to facilitate capacity expansion, where good coverage already exists, e.g. introducing hot spot micro cells.
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TET - Traffic estimation tool
• A test transmitter is used that transmits a BCCH-frequency
• The mobiles in the surrounding cells measure the signal strength of the test transmitter
• The test transmitter doesn’t take any traffic
TEST Transmitter
MR:sMR:s
TEST Transmitter shown is from ROHDE&SCHWARTZ
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TET Traffic level chart of Surrounding cells
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Agenda
OSS-RC RNO Overview
RNO for WCDMAMRR-WNCS-W
NCS-GW
OSS-RC RNO Summary
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Why MRR-W?! ”If I have an RNC with maybe 800 or more cells and a mix of
urban, suburban, outdoor and indoor areas, then I would like to find:
– The cells with the worst coverage problems in UL or DL– The cells with the worst voice quality in UL or DL.”
! ”If I have a number of cells with high call drop rates then I would like to investigate the radio environment
– Can it be bad coverage in UL or DL?– Can I find any DL interference?”
MRR-W can be used to:• Evaluate and supervise network performance and quality
• Perform network tuning and optimization
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Advantages of MRR-W
! MRR-W is used for supervision and evaluation of the networkperformance for a large number of cells
! Unique measurements not available anywhere else! Measured per service or Spreading Factor! Find the cells with bad speech quality! Analyse and optimize the Signal levels (Ec/No and RSCP) for
HSDPA (Service=InteractiveHS)! Analyse the uplink and downlink quality for the Video users! Find cells with coverage problems in uplink or downlink
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MRR-W dependency:Radio Environment Statistics - RES
! RES is a measurement function implemented in the RNC– Collects measurements from RNC, RBS and UE
• DL BLER
• UE TX Power
• DL CPICH Ec/No
• DL CPICH RSCP • UL BLER• DL TX Code Power
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MRR-W Recording
MRR-W Report
Error Log
RNO Main Window
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MRR-W New Recording
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MRR-W Overview Report
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MRR-W Histogram Report
Downlink CPICH Ec/No in dB for Speech
Downlink CPICH RSCP for Speech
90th Percentile= -12 dB
90th Percentile= -107 dBm
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Downlink Speech BLER (%) Uplink Speech BLER (%)
UE Transmit Power for Speech (dBm) Downlink CPICH Ec/No for Speech (dB)
Downlink CPICH RSCP for Speech (dBm)Downlink Transmit Code Power for Spreading
Factor 128
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Why NCS-W?! ”Correct Neighbor cell definitions are vital for good WCDMA
performance, even more so than for 2G systems.”! ”Neighbor cell optimization usually requires a lot of manual
O&M work and drivetesting”! ”The network expansion is so fast that it is difficult to keep
up”
NCS-W can be used to:• Identify missing and unused neighbor relations
• Identify cells that covers too much (causing dropped calls)• Make fast re-optimization when cells are down or during
catastrophy situations
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WCDMA Neighboring Cell Support! NCS-W can be used to:
– Detect missing neighbor cell definitions– Supervise existing neighbor definitions– Evaluate new cell relations after cells are added to the network
Existing neighbors
Missing neighbor
New cell
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WCDMA Neighboring Cell Support
STATS GPEH
CSDb
Soft handover counters
GPEH Events
RNC
OSS
NCS-W Reports
NCS-W Change order(Planned Area)
Add: Relation A-BAdd: Relation B-A
Remove: Relation A-C....
Update NW
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GPEH Events
! Based on GPEH messages:– INTERNAL_SOHO_DS_MISSING_NEIGHBOUR
! Occur when RNC receives event 1a or 1c measurement report and the triggering cell is not included in the Neighbor Set
– INTERNAL_SOHO_DS_UNMONITORED_NEIGHBOUR! Occur when handover proposal is received, where the
proposed cell is included in the neighbour set, but not included in the monitored set
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Counters
! NCS-W collects and presents counters that measure WCDMA neighbour relations usage
! The cell relation counters used are:– pmRlAddAttemptsBestCellSpeech– pmRlAddSuccessBestCellSpeech
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NCS-W New Recording WCDMA<-> WCDMA (soft, softer)
GSM->WCDMA
GSM<->GSM
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NCS-W Overview Report
Data from GPEH Data from soft handover counters
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NCS-W Cell ReportDefined Neighbors
Distance calculated from cells coordinates in
the CS database
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NCS-W Cell ReportUndefined Neighbors
Guess based on reported SC and data from CS database
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Why NCS-GW?
! ”Correct IRAT neighbor relations are important for reducingdropped calls and improving speech quality”
! ”WCDMA uses GSM as fallback technology whencoverage/quality or capacity fails”
NCS-GW can be used for:• Optimization of the GSM to WCDMA neighbor relations
• Find missing neighbor relations for WCDMA to GSM
IRAT – Inter Radio Access Technology
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NCS-GW Usage
! NCS-GW can be used to:– Find neighboring 3G cell relations to a new GSM cell (network
planning) – Find missing neighboring 3G cell relations in the active 3G BA-
List in GSM cells (network optimization) – Find neighboring 3G cell relations to be removed from the active
3G BA-List in GSM cells (network optimization) – Evaluate neighboring 3G cell relations in GSM cells (network
supervision).
! The result will be improved quality and fewer dropped calls
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Integrated in NCS as an add-on
Neighbouring Cell Support GSM-WCDMAAccording to FDDMRR or change during rec. to
1, 2 or 3
UMFI (UTRAN MeasurmentFrequency Information) =
Frequency-SC-DIV/NODIV
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NCS-GW Overview ReportTop ranked cells with potential new WCDMA neighbor relations to add
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NCS-GW Cell Report
Undefined Neighbors
Defined Neighbors
Data from MR:s Data from STS
Data from MR:s
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NCS-GW Change Order
When finished, export...
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