Tems Training Moazzam

7/31/2019 Tems Training Moazzam

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TEMS Training


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Drive Test New Site/ Initial Drive TestInitiate the drive test after a site on-air. Make sure that site perform well after on-air.

Test Call New SiteConducting tests call at a new On-Air site, to justify the performance of a site just after On-

Air.

Drive Test Upgrade/Expand TRXAfter implement new TRX or expand TRX, a drive test performed to justify that site working

well with the new TRX.

Drive Test SFH/Hopping implementation

After implement SFH/hopping in the network, a drive test performed to justify that this hoppingsolution working well with the whole network.


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TEMS = Test Mobile SystemProduct byERICSSON

Solution Tools for Wireless Network to Plan, optimized,

and expand their systems.

A Test tool use to read and control information sent over the airInterface between the base station and the mobile station in GSM/cellular system. It can also used for radio coverage measurement

Introduction

WHATS TEMS


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WHATS TEMS

Product of TEMS

TEMS Transmitter TEMS Light TEMS Indoor TEMS Investigation TEMS Deskcat TEMS Drive Tester TEMS Pocket

TEMS Automatic TEMS CellPlanner TEMS LinkPlanner

TEMS Automatic TEMS CellSight TEMS Visualization

Introduction


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Introduction

WHATS TEMS


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TEMS TEMS INVESTIGATION

Introduction

WHATS TEMS

Software

Handset


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Introduction

WHATS TEMS

TEMS Investigation version:

TEMS Classic/98 : SH888; post process with 3rd-party-s/w TEMS 2 : R230; post process with 3rd-party-s/w TEMS 3 : R520; post process with 3rd-party-s/w

TEMS 4 : T68; export from TEMS TEMS 5 : T610; export from TEMS TEMS 6 : various handset; data collection & route analysis TEMS 7 : various handset; data collection & route analysis


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As Drive Test Tools

DRIVE TESTING HIGHLIGHTS

Drive Test = Testing the network in particular areato give the real picture of the networksperformance on the field, with a certain tools.

Drive Test Planning

Implementation

OptimizationMichael pipikakisEvaluating and ImprovingThe Quality of Service of

Second Generation CellularSystemSeptember,2004


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Drive test TEMS

As Drive Test Tools



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As Drive Test Tools


Drive Test Equipments

Laptop

TEMSHandset

Notes :

-power supply needed, usually using inverter in the car from laptop, GPS and MS

-GPS should use external antenna

-MS can use external antenna or not use external antenna.

(Use external antenna means measure RxLevel Pedestrian / Street Level)

(Not use external antenna means measure RxLevel In car level) -> more realistic result

If using scenario not external antenna, MS position should be carefully chosen and stableduring drive test


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As Drive Test Tools

MODE OF DRIVE TEST

1. Dedicated / Continuous / Long Call Mode

Making continuous call along drive test activity.

Before starting the route, call the drive test number, ex. 199 for Telkomsel,And only stop the call when the route (drive test) finish.

To see the quality and coverage of the network


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As Drive Test Tools

MODE OF DRIVE TEST

2. Idle Mode

Along the drive test activity, the MS is ON but no call occur

To see the coverage of the network


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As Drive Test Tools

MODE OF DRIVE TEST

3. Sequential / Qos / Short Call Mode

Creating the sequence of call along the drive test activity

Before starting the route create call sequence, for example:Create call for 70 s and idle for 10 s.Along the drive test, play this sequence until the route is finished

To see the real network performance run, when people call


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As Drive Test Tools

SCAN

one of TEMS feature scan all or selected frequencies on the selected spot or route to find the clearest frequency

CleanFrequency

Application of frequency plan to find the best frequency to be use in the siteto identify interference adjacent channel and co channel


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To See How the Network Runs

THE USE

In PLANNING works:

Drive Test Before InstallationPerform drive test before our network implemented.

This data later will be compared with drive test after implementation,

to justify.

Drive Test Before SWAPBefore swap (change operator network), drive testing

needed to compare the current network with the network after swap.To justify the new network is better than before.

Drive Test BenchmarkingDrive test the whole area for the whole active networks,before our network implemented. So when our network

implemented, can be competed well.

etc


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THE USE

In Implementation Works:

Drive Test New Site/ Initial Drive TestInitiate the drive test after a site on-air. Make sure that site

perform well after on-air.

Test Call New SiteConducting tests call at a new On-Air site, to justify the

performance of a site just after On-Air.

Drive Test Upgrade/Expand TRXAfter implement new TRX or expand TRX, a drive test

performed to justify that site working well with the new TRX.

Drive Test SFH/Hopping implementationAfter implement SFH/hopping in the network, a drive test

performed to justify that this hopping solution working well with the wholenetwork.

etc


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THE USE

In Optimization works:

Drive Test Handover/ Add & Delete neighborsDrive test conducted after theres changing in neighbours

database. Make sure the add really added and the delete really deleted.

Drive Test before & after DowntiltDowntilt conducting, to get better coverage from each antenna.

Drive test performed to make sure the better coverage from each anglechanged.

Drive Test Network AuditPerforming drive test activity to maintain the whole network.

Could be an annual work.

Drive Test Benchmarkperforming drive test to get justification about our network. Can compete ornot. With comparing the whole network including 'us in drive test.

Drive Test troubleshootingDrive test for special troubleshooting case. Such as, a site that

cannot handover from sites surround it, a site that cannot transmit good

signal and cannot achieve its coverage. etc,

How TEMS works?


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How TEMS works?

Several measurement is only available and recorded in idle mode (C1,C2 etc)

Several measurement is only available and recorded in dedicated mode (RxQual, SQI, FER etc)

This is happen because of GSM system network works, not because setting in TEMS

There are several option/feature can be activated by user (force handover, lock handover etc)which change TEMS measurement behavior

IMPORTANT NOTICE :

In GSM, there are two types of values presented for RxQual, namelyRxQual Full and RxQual

Sub. RxLev, the parameter representing thesignal strength , also has similar Full

and Sub values.The FULL values are based upon all frames on the SACCH multiframe,whetherthey have been transmitted from the base station or not. This meansthat if DTX DL has beenused, the FULL values will be invalid for that periodsince they include bit-error measurements atperiods when nothing has beensent resulting in very high BER.In total, 100 bursts (25 blocks) willbe used for the FULL values


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The SUB values are based on the mandatory frames on the SACCH multiframe. Theseframes Must always be transmitted.

.How TEMS measure FULL or SUB measurement?

TEMS record both SUB and FULL measurement at the same time and at the samelog files, it is just need to set what we wan to see in replay mode.

FULL

SUB

LOG FILE


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WHAT TO SEE WHAT TO MEASURE

Parameters to See

1. RxLevelLevel of Received signal strength. In dBm or Steps. If the value in form of step substract 110 tothe value to get dBm value.RxLevel is received power level at MS (maximum RxLevel measured by MS is () 40 dBm


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2. RxQualReceived signal quality level, measured base on BER (bit error rate).

The value is between 0-7, the lower the better.

Better


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3. SQIThe parameter used by TEMS to measure Speech Quality.

SQI has been designed to cover all factors that RxQual lack to measure.SQI computation considers the factors:

the bit error rate (BER)the frame erasure rate (FER)data on handover eventsstatistics on the distribution of these parameters

Better


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4. Others

FERFrame erasure rate

BCCH-BSIC

HoppingSFH

C/IInterference

TA Time Advance

C1Path loss criterion parameter

C2Cell reselection criterion parameter in hierarchical cell structure


WHAT TO SEE WHAT TO MEASURE


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4. Others

FER Frame erasure rate; See on Radio Parameter windows

ARFCN BCCH-BSIC Absolute Radio Frequency Channel Number of Broadcast Control Channel. Base Station Identity Code Important data of a site

Hopping Indicating if SFH implemented. See on Current Channel windows, on hoppingchannel, hopping frequencies, MAIO, HSN

C/I The carrier-over-interference ratio is the ratio between the signal strength of the current

serving cell and the signal strength of undesired (interfering) signal components. The C/I measurementfunction built into TEMS Investigation enables the identification of frequencies that are exposed toparticularly high levels of interference, something which comes in useful in the verification andoptimization of frequency plans.

TA Timing Advance. Valid only in dedicated mode. ; To measure the distanceof MS from

serving cell. Valid only in dedicated mode. See on Radio Parameter windows.

C1 criteria used for cell selection and cell reselection

C2 criteria used for cell reselection


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CASES

The examples of How Drive Test can see a Network runs.


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CASES

1. BTS Down

Get in to the site (whether its new or existing), then see on TEMS display,

At parameters BCCH, BSIC. If the intended sites BCCH doesnt appear, the site is Down

If we dont have the site data. We can go the exact position of the site, near/under the antenna.Then see if on the serving cell, the Rxlev is good ( above -60 dBm)


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CASES

2. Handover

We need to check the handover between sector1 of Site A to sector3 of Site B.We start at the Site A. Check the parameters on TEMS. Make sure the serving cell nowIs from the sector1 of site A. See the neighbour, if the sector3 of site B appear.Start the drive test, with dedicated mode, to site B sector3 (specified the route first).The handover should be occur along this drive test. If its not, note this as a problem.

See any possibility of the problem, such as:the neighbour not appear, possibility havent been createdtheres other site betweentheres obstacleThen do the opposite, start from sector3 Site B to sector1 Site A.


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CASES

3. Swap FeederTheres a possibility that we have bad installation, for example swap feeder.Swap feeder occur when the installation switch by mistake, for example the feeder to sector1Became to sector 2, from BTS.We can see this from drive test.For example, we have a site with 2 sectors, with a road in front it, to be covered.We should have the data of this site, such as the BCCH of each sectors.We start the drive test from sector 1 to sector 2. While were on sector1 coverage, see if the

BCCH of serving cell is the correct one, according to the data we have.And do the opposite from sector 2 coverage to sector1

sect1

sect2


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CASES

4. Overshoot

When we get the signal from the site that not close to the current area drive test.Usually we get bad RxQual and long/bigger TA.We can suspect this as a overshoot case. This case happen when a site/cell is serving faraway from its area.


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Guidelines

Drive Test Types

1. Drive Test Continuous Route

Drive Test is walk/ drive along the route non stop

2. Hot Spots Measurement

Drive Test only at certain spot (usually critical point), TEMS standing still, no movement for 1-5minutes but still recording.Usually for scanning frequency or to investigate more detailed network behaviour


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Guidelines

Drive Test Guideline

1. PreparationDont go to the field without a good preparation. Prepare the tools completeness, maps, cars,

scenarios, sites data, knowing area we are heading to.2. Check Tools

Beside checking the tools completeness. Also check each tools if its working well, such as

the GPS, inverter, handset, including SIM card.3. Some Rules

- Avoid to have the same route twice, or go on the same road twice.- Beware of certain area, such as restricted area, one way street, traffic jam streets.- Create simple/effective way of scenarios, where to start until finishing the route.- Good cooperation with driver.- Make sure the roads on the route, can represent the whole network as samples.

4. Pay AttentionEven if were only collecting data, we must focus on our activity. Avoid the things that can

make us re-drive test , such as, data cable unplugged from its MS, forget to turn-off the GPRS

mode when we dont need GPRS to measure, run out GPS batteries, forget to record, forget

the purpose of the drive test, assure the data collected is right, pay attention of car speed,create notes for special events, etc.

5. Reporting and AnalysisTEMS can divided as two, data collection and analysis. After drive test on the field, we mustprovide data to be analyze and reported. Make sure we can create a good report and analyzewell, by performing all of the points above.


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Plot

Reporting Guidelines

1. Drive test report basically can be divided as two: Plot and Statistic.

BCCH: 59

logfile floor RxLevel Average % RxQual Data

= 0

BRI1 1 -65.12706271 93%

BRI2 2 -58.26292629 98%

BRI3 3 -57.53480663 87%

Guidelines

Statistics


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2. Before we can create the report, make sure we have the right standard for each valuereported. Such as how many ranges the treshold of RxLevel, and RxQual. The colorranges of SQI and FER, etc.

3. Export the right data for Plotting. To create Plot report, for example we need the logfileto be mapinfo files. Make sure we have TEMS 4 above, that can directly export thelogfile into mapinfo file. Or, if we have TEMS 3 below, make sure we have third-partysoftware that can create it, such as GIMS.


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4. For statistic report, usually we only need the excel file and some of mapinfo data.Each version of TEMS investigation can export the logfile into text file, *.fmt. This

format can open , and manage with Microsoft Excel.

5. Following the standard report of the customers.

Msid TIME FRAME POSITION MESSAGE TYPE HEXADECIMAL STRING

LAT LON

MS1 15:41.7 2609056 S 0000.0240 E 00000.0314 PAGING REQUEST TYPE 1 0F 0F 25 06 21 00 05 F4 30 A2 DB CC 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B

MS1 15:43.1 2609362 S 0000.0240 E 00000.0318 PAGING REQUEST TYPE 1 0F 0F 15 06 21 00 01 F0 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B

MS1 15:44.5 2609668 S 0000.0240 E 00000.0319 PAGING REQUEST TYPE 3 0F 0F 4D 06 24 00 30 C3 AC 76 30 C2 33 8E 30 C3 0F AF 30 C3 16 3E 83 2B 2B

MS1 15:45.9 2609975 S 0000.0240 E 00000.0322 PAGING REQUEST TYPE 1 0F 0F 41 06 21 00 05 F4 30 C3 9B 1A 17 05 F4 30 C3 AD 45 2B 2B 2B 2B 2B 2B

MS1 15:46.1 2610013 S 0000.0239 E 00000.0322 IDLE MODE REPORT 0E CF E2 00 0C D0 56 10 4D DA 0F CB D7 10 09 DA 0E 88 00 0F 46 80

MS1 15:47.3 2610281 S 0000.0239 E 00000.0327 PAGING REQUEST TYPE 1 0F 0F 25 06 21 00 05 F4 30 C2 D0 1B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B


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Layer 3 Messages

-To Monitor the event and signaling sent and received by Phone- List Messages of event and signaling

-Often use in analysis, after Drive Testcompleted

-Replay the logfile, click a point on theroute marker on map window,

then see on layer 3 messages windows,detailed information on theassociated messages appears in this window

-Can double-click each list message fromthat window to open a new windowdisplaying the full contents of the message.


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Scanning Function inside TEMS

TEMS Investigation supports scanning of radio frequency carriers (channels),using either a ordinary TEMS mobile station or a dedicated frequency scanner mobile,the TEMS Scanner.

Scanning is handled from the Frequency Scanner window, and here the output ofthe scan is displayed, too


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BCCH BSIC Average Rx Level (dBm)

51 35 -104

52 - -115

53 26 -110

54 - -114

55 - -105

56 - -115

57 26 -111

58 - -114

59 - -115

60 - -115

61 - -111

62 - -113

63 - -115

64 - -115

65 - -115

66 15 -110

67 - -114

68 - -114

69 - -114

70 - -114



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Procedure:

Selecting ChannelsIn the Frequency Scanner window, choose the unit to use as scanner in thecombo box.Click the Measurement Settings button.

The channel selection is handled from the Scanned channels tab:

Checking "Decode BSIC" causes the Base StationIdentity Code to be decoded. It will be shown in the

table to the right in the Frequency Scanner window


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Performing Scan

Presenting Scan


To start scanning, click the Start Scanning button.While the scanning is going on, the status bar shows the padlock symbol , indicating that the scanner is busy.To stop scanning, click the Stop Scanning button.

Bar Chart Line Chart Table


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After Process / Report


Plot

Spreedsheet

Directly capture Export to Mapinfo

Export to text (.fmt), open and process with Excel spreedsheet

BCCH BSIC Average Rx Level(dBm)

51 35 -104

52 - -115

53 26 -110

54 - -114

55 - -105

56 - -115

57 26 -111

58 - -11459 - -115

60 - -115

61 - -111

62 - -113

63 - -115

64 - -115

65 - -115

66 15 -110

67 - -114

68 - -114

69 - -114

70 - -114


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Life time MS measurement equipment maximum 1 year, if more than 1 year need to be re-calibrate

Calibration MSs cost almost the same price buy a new one

Ericsson only support 2 version below for re-calibrate (eq : latest version is TEMS 7.0, means onlycan re-calibrate handset at version 5)

If MS not calibrated or buy a new one, it will impact into the measurement (such as RxLevel andRxQual) will reduced and not valid => KPI will not achived

TEMS always have bugs (even latest version) both coming from software or from type MS itself,need knowledge to anticipated it (such as wrong RxLevel recorded)

HINTS for MS:


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PC which use for TEMSshould turn off any usage ofCOM, IR, bluetooth, Wi-Fi,any accessories attached atPC should be turn off, set PCinto Maximum Performance

at Control Panel-System

Slow PC, low memory, lowHD capacity will make MSdisconnected suddenly whenTEMS use for a long time,same things happened if thebattery of PC/laptop is too hot

Turn off power saving featurein the laptop/PC

Turn off screen saver

It would be better drive testlaptop is only for do drive testnot for daily routine

HINTS for PC/Laptop:


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Make sure all connections cable at TEMS system is tight, as well external antenna

For indoor drive test, MS position is very crucial because some MS location can increase bodyloss or other losses (such as MS put behind laptop or put MS near body)

Avoid doing drive test at busy hour especially will increase loss (eq : a lot of people in the mall willincrease body loss, a lot of car in the basement, traffic jam)

For 3G drive test, more user using 3G will reduce quality, do drive test at low traffic is essential

Drive test indoor need constant speed walk test (idle mode slower than dedicated mode) Drive test outdoor should be constant and not to fast ( max 40 km/h inner city and max 60 km/h

outer city)

Drive test recorded more than once at the same route (if possible) because it always given resultslightly different. Take the best one as a report

Result Drive Test route for outdoor drive test should be ignored when drive test route insidetunnel, on top of fly over road, below fly over road, bridge. Pay attention that GPS cant work well

if no LOS into the sky

HINTS for Drive Test:


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Reference

Ericsson.com/tems

Michael Pipikakis, Evaluating and Improving The Quality of Service of SecondGeneration Cellular System, September,2004

TEMS Investigation 4.0 Manual

TEMS Investigation 2.03 Manual

TEMS Investigation 7.0 Product Description


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Tems Training Moazzam