4 rno slides r1a

8/11/2019 4 Rno Slides r1a

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LZU 108 5080 Figure 4 - 1 GSM OSS Statistics Handling

RNO

Radio Network Optimization




RNO Benefits

RNO Reports

Time efficient -

Compare drive tests

Measurements can

be done for a large

radio network area

All TRXs and active mobiles

contribute to the measurements

Reports are based on

real measurements,not predictions

Both up- and downlink

is considered

Automates complicated,

time consuming and

frequent tasks




RNO - Radio Network Optimization

BSC

BSC Required

subsystems

Applications

MRR - Measurement Result Recording

FAS - Frequency Allocation Support

FOX - Frequency Optimization eXpert

NCS - Neighbor Cell Support (NCS)

NOX - Neighboring cell Optimization eXpert TET - Traffic Estimation Tool

MRR

RIR

BAR




RNO - Common Functions

BSC

RNO Applications Recording

Definition

Recording

Data

CountersChange

Order

Implemen-

tation

ReportsExport

DataCollection

CNA SDM

• Recording Activities

• Recording Results


http://slidepdf.com/reader/full/4-rno-slides-r1a 5/48LZU 108 5080 Figure 4 - 5 GSM OSS Statistics Handling

BSC

Configuration

Measurements

Recording

ReportsCollect

RNO Workflow

Activate Recording

Result transfer

FOX/NOX

CNA

Update Network Analyse



Recording Session



Schematic picture of a Recording in

Recommendation/Automatic Mode



Collects and presents

radio environment

statistics from all

measurement reports

sent from all mobiles.BSC

MRR - Supervision and Troubleshooting

of Radio Characteristics



MRR - Field Of Application

• Optimization-

• Supervision -

• Verification -

Analyze radio characteristics

for problem cells

Supervise radio characteristicsin a new area or an area using

new features

Make comparisons beforeand after a change



MRR - Measured Radio Characters

• Signal Strength, Uplink and Downlink

• Signal Quality, Uplink and Downlink

• MS Power Level

• BTS Power Reduction

• Timing Advance

• (Path Loss, Uplink and Downlink)




MRR - Reports

• Overview Report

• Overview Histogram

• Cell Histogram

• Trend Report

• Top Ten Chart

• Comparison Report

• Cell Comparison Histogram

• Comparison Chart




Find missing neighbour

cell relations

Find unnecessary

neighbour cell

relations

Measurement

Reports

OSS

NCS & NOX - Planning & Optimization of

Neighbour Relations




NCS/NOX - Field Of Application

• Optimization-

• Supervision -

• Planning -

Find missing neighouring cell relations

to be added

Find unnecessary neighouring cell

relations to be removed

Evaluate neigbouring cell relations

Find neighbouring cell relations to

new cells




NCS and NOX

• BAR is used to find

potential neighbours to

add

• Handover statistics is

used to find neighbours

that can be removed




NCS/NOX - Reports

• Overview Report

• Cell Report

• Detailed Cell Report

• Cell Report Chart

• Change Order

• Change Order Recommendation

• Change Order Evaluation

• Reallocation Log

NOX unique Reports




NCS Cell report




On BCCH Level:

• Number of reports above the relative signal strength

threshold

• Number of reports ranked as number 1

• Average signal strength when number 1

• Total time the frequency was in the BA-list

•

Handover statistics (for neighbours)

• Probable cell name (for test frequencies)

NCS - Report Contents




NCS - Report Contents

On Cell Level:

• Number of times the best test frequency was reported

above the relative signal strength threshold

• Number of times the worst configured frequency was

reported above the relative signal strength threshold




Measuring

cell RxLev = -85BSIC = 12

BCCH = 65

BSIC/BCCH = 12/65

BSIC/BCCH = 12/65

BSIC/BCCH = 12/65

NCS/NOX - Finding the probable cell name




NOX Functions - Overview

Suggested neighbouringrelations to add and

remove

Measurement

Result

NOXReallocation search

Implementation

Measurements inlive network

Automatic mode

Recommendation mode




• Number of neighboring relations per cell

•

Number of handover attempts(removal)• Number of measurement reports (addition)

• Barring matrix

• Dual band

NOX - Function

Data Analysis: Optimization Algorithm




OSS operator can:

• Accept the implementation of the proposed change

• Modify the proposed change and allow the implementation

• Allow automatic implementation of changes at scheduled time

NOX - Function

Algorithm Output: “change order recommendation”




FAS & FOX - Planning & Optimization of Frequency Allocations

Interference Signals on the uplink

OSS

Interference Signals on the downlink




FAS & FOX - Field Of Application

• Optimization -

• Supervision -

• Verification -

• Planning -

Improve the frequency plan

due to quality problems

Supervise the interference

levels on frequencies in use

Find suitable frequencies inorder to add or expand a cell

Verify improvement after

a frequency change




FAS & FOX

How to see uplink Interference ?

• TRX measures the uplink

interference repeatedly on

configured and test frequencies

• Samples every 15 sec

• Use RIR function in BSC




FAS & FOX

How to see downlink Interference ?

• Measurement Reports from MS on

configured and test frequencies are collected

• ICDM & PIT are computed to give

estimation of downlink interference

• Use BAR function in BSC




ICDM - Inter Cell Dependency Matrix

•

Shows how much one specific cell interferes other cell- Adjacent and co-channel interference

• ICDM is used to compute PIT values

• ICDM can be imported to TCP to simulate downlink interference instead of

predicted data




PIT - Percentage Interfered Traffic

• Estimation of downlink interference

• Calculated for all frequencies in all cells




FAS/FOX- Reports

• Overview Report

• Cell Report

• Cell Report Chart

• Overview Comparison Report

•

Cell Comparison Report• UL Data Validity Report

• ICDM Report

• ICDM Validity Report

• ICDM Probable Interfering Cell Report

• Change Order

• Change Order Recommendation

• Change Order Evaluation

• Reallocation Log

FOX unique Reports




Measuring

cell RxLev = -85BSIC = 12

BCCH = 65

BSIC/BCCH = 12/65

BSIC/BCCH = 12/65

BSIC/BCCH = 12/65

FAS/FOX - Finding the probable cell name




Relation Between FAS and FOX

Cellularnetwork

DataCollection

Recording

Definition

FOX

Algorithm

FOX

Result

FOXReports

FAS

Reports

FAS

Result

Export

CNAPlanned Area

FAS

FOX

CNAUpdate Job

Change

Order

CNA

Implementation




FOX - Data Analysis: Optimization Algorithm

• Find tentative realloc. suggestions- Improve own uplink or,

- Improve own downlink or,- Change interferer

• Checks- UL data validity/freq.sets/inactive cells

•Prioritize the list- Improve worst uplink

- UL interference gain

- Improve worst downlink

- DL interference gain

•

List compilation- Excessive downlink interference check

- Barring matrix

- Spacing matrix




OSS operator can:

• Accept the implementation of the proposed change• Modify the proposed change and allow the implementation

• Allow automatic implementation of changes at scheduled time

FOX - Function

Algorithm Output: “change order recommendation”




?

??

Off-load

Off-load

Off-load

Hot Spot

Finder

OSS

TET - Planning & Optimization of Hot Spot Cells




TET - Field Of Application

• Find the right location for new cells

• Estimate offload of existing cells

•

Dimension new cells• Find suitable neighbouring cells

Planning &

Optimization




TET - Using TEMS Test Transmitter

TEMS -

test transmitter

• TEMS test transmitter is needed

• Measurement reports from MS on

configured and test frequencies are

collected

• Use BAR function in BSC




TET - Reports

• (Open Report)

• Overview Report

• Traffic Level and Off-Load Report

• Traffic Level Chart of Surrounding Cells Report




TET - Report Contents

• Existing traffic levels

• Estimated off-load- absolute signal strength threshold

- relative signal strength threshold

• Remaining traffic levels

- absolute signal strength threshold

- relative signal strength threshold




Summary




MRR - Summary

Collects and presents radio

environment data form all

mobiles (UL and DL) not

available in any other tool

MRRMRR

BSC

Radio Characteristics:

• RXQUAL UL & DL

• RXLEV UL & DL

•Path loss UL & DL

•Timing Advance

• Power level, MS

•Power reduction, BTS

Reports

• Overview reports

• radio characteristics

histograms

• comparison reports• trend reports

Measurement Reports

Recording threshold:

•RXQUAL(UL/DL)

• RXLEV(UL/DL)

•Timing Advance

Start recording

NCS Addi i f i hb i ll l i S




NCS - Addition of neighboring cell relation - Summary

BCCH1

BCCH2

Measurement

Reports

BARBAR

BSC

STSSTS

Addition of

neighboring cell

relation

Not defined neighbor,

but a good candidate.

Add to BA-list!

Measure signal strength of

BCCH in BA-list of:

• Defined neighbors

• Test frequencies

Statistics on BCCH level:

• Number of reports above therelative signal strength threshold.

• Number of reports ranked as no.1

• Average signal strength when no.1

Statistics on cell level:

• Number of reports the best test

frequency was ranked no.1

• Number of reports the worstconfigured frequency was ranked

no.1

NCS R l f i hb i ll S




NCS- Removal of neighboring cell - Summary

BCCH1

BCCH2

BARBAR

BSC

STSSTS

Removal of

neighboring cell

relation

Defined neighbor,

but very few handovers.

Remove from BA-list!

STS handover statistics

from ~1 weeks

measurement

NOX S




NOX - Summary

BCCH1

BCCH2

BAR STS

NOX Optimization Algorithm

• Number of measurement reports

• Number of handover attempts

• Length of BA-list• Dual band

• Barring matrix

Experience has shown

that one hour of NOX

recordings can save around150 hours of drive tests

Recommended or

automatic mode

BSC

Change order

recommenation

Change order

evaluation




Downlink

„Interfered‟

frequencies

ICDM

‘How is each cell

heard and how does

it hear other cells’

FAS - Summary

Measurement

Reports

Downlink BCCH1

BCCH2

PIT

calculation

PIT is compensated for:

• Traffic load

• BTS power regulation

• DTX usage

Measurement results

related to frequency plan

BAR RIR

BSC

• RxLevBCCHx > RxLev_serving +

Threshold (threshold on co- channel

and adjacent channel)

• BCCH in cellset + 1st and 2nd order

neighbors are measured in the

recording.

FAS




FAS - SummaryUplink Interfered

frequencies

Uplink

Interference

values from TRX

Percentile

values

Downlink

BCCH1BCCH2

Interfered

frequencies on

uplink (config

& test frequencies)

BAR RIR

BSC

Percentile value in dBm for

each frequency is the signal

strength given when x%

(defined threshold) of the

total samples has been reached.

FOX




FOX - Summary

Interference

values from TRX

Measurement

Reports

Downlink

BCCH1

BCCH2

FOXImprove own uplink

or

Improve own downlink

or

Change interferer

BAR RIR

BSC

Recommended or

automatic mode

TET




TET - Summary

Estimates automatically

carried traffic by a new

hot spot site off-loadingthe neighbors

BARBAR

BSC

Measurement

ReportsStart recording

test frequency=BCCH

for test transmitter

?Off-load

Off-load

Reports

• Overview Report

• Traffic Level and Off-load Report

• Traffic Level Chart of Surrounding Cells

Put test-transmitter(sending out BCCH info)

at location for new

hot-spot microcell.

Measure signal strength of

BCCH in BA-list off :

• Defined neighbors

• Test frequencies

4 rno slides r1a

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