UMTS900 Trial RF Test Report Ed1a

Alcatel-Lucent

2008

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UMTS900 Trial RF Test Report

Reference Date Edition Page

1/22/2008 1a 1

INDOSAT

UMTS 900 TRIAL

UMTS900 RF TEST REPORT

JANUARY, 2008

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Table of contents

1 INTRODUCTION .................................................................................................................................................. 3

2 UMTS900/ GSM900 INTERFERENCE TEST ...................................................................................................... 3

2.1 Interference Tests for non-collocated GSM900 & UMTS900 sites ........................................................ 3

2.1.1 Test Purpose ........................................................................................................................................ 3

2.1.2 Test Requirement ................................................................................................................................. 3

2.1.3 Test Configuration ................................................................................................................................ 3

2.1.4 Test Scenario ....................................................................................................................................... 4

2.1.5 Test Result Non Co-location Scenario ................................................................................................. 5

2.2 Interference Tests for collocated GSM900 & UMTS900 Sites ............................................................. 12

2.2.1 Test Purpose ...................................................................................................................................... 12

2.2.2 Test Requirement ............................................................................................................................... 12

2.2.3 Test Configuration .............................................................................................................................. 12

2.2.4 Test Scenario ..................................................................................................................................... 13

2.2.5 Test Result Co-location Scenario ....................................................................................................... 14

2.3 GSM UL Interference QoS Monitoring ................................................................................................... 20

3 UMTS900 /CDMA800 INTERFERENCE TEST .................................................................................................. 21

3.1 Test Purpose ............................................................................................................................................ 21

3.2 Test Requirement .................................................................................................................................... 21

3.3 Test Configuration ................................................................................................................................... 21

3.4 Test Result ............................................................................................................................................... 21

4 RF SERVICE COVERAGE TEST....................................................................................................................... 23

4.1 UMTS Service Coverage (soft handover) .............................................................................................. 23

4.2 UMTS Service Coverage (end of cell) .................................................................................................... 24

4.2.1 Voice call service coverage ................................................................................................................ 24

4.2.2 GSM BCCH coverage ........................................................................................................................ 25

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1 INTRODUCTION

UMTS900 trial is established between INDOSAT and ALCATEL-LUCENT in Banjarmasin area. Starting

on 9th Jan 2008 after frequency license approved by DIJET POSTEL, RF activities is restart. There are 2

major RF activities: Interference test, Coverage test has been asset to evaluate UMTS900 RF

performance.

2 UMTS900/ GSM900 INTERFERENCE TEST

The introduction of UMTS in 900MHz band requires co-existence analysis between GSM and UMTS. The goal of this test case is to measure quality degradation and interference level of both systems according to the frequency spacing (between GSM and UMTS).

2 cases are evaluated: non-collocated sites and collocated sites

2.1 Interference Tests for non-collocated GSM900 & UMTS900 sites

2.1.1 Test Purpose

The test purpose is to measure the impact of quality and interference level in U900/G900 non-collocated scenario.

Two frequency spacing are proposed to be tested: 2.6 (no guard band) &2.8 (one channel guard band)

2.1.2 Test Requirement

Environment: Live / Static & Mobility � Non-collocated UMTS900 and GSM900 sites are mandatory for Downlink test cases and suitable for

Uplink tests.

� GSM BCCH set to ARFCN=26, UMTS frequency reuse GSM ARFCN 1-25. ( 2.6 frequency spacing) � GSM HO has to be deactivated in involved GSM sites ( In this case we used TEMS forced to

channel 26) � Load generation: UMTS DL load: OCNS 95% ( to simulate maximum transmit power from UMTS)

Equipments & tools:

� UMTS UE traces (X-CAL drive test tool) � GSM UE traces (TEMS drive test tool) � CTb/OT cell trace (RNC traces) � Spectrum analyser HP 8594E

2.1.3 Test Configuration

2.1.3.1 Conf1: GSM900/UMTS900 interference tests with GSM900 as victim

� GSM voice calls set up at 3 locations : Near, Middle , Far from GSM site. Measure GSM qualtiy � UMTS voice calls set up at same locations : Near, Middle , Far from GSM site � GSM Call performs at same location & drive test is realised up to cell edge. Measure GSM quality

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GSM 900

UMTS 900

Copyright © 1996 Northern Telecom



UMTS 900

GSM 900




2.1.3.2 Conf2: GSM900/UMTS900 interference tests with UMTS900 as victim

� UMTS voice call setup at 3 location: Near, Middle, Far from UMTS site. Measure UMTS quality � GSM900 voice calls setup at same 3 location: Near, Middle, Far from UMTS site � UMTS call performs at same location& 3G drive tests are realised up to cell edge. Measure UMTS

quality

2.1.3.3 Test Output

For GSM UE victim: � RxQual vs. Rxlev � UE Tx Power � UL RSSI on GSM BTS

For UMTS UE victim: � CPICH EcNo vs CPICH RSCP � DL SIR � UL RSSI report by UMTS NodeB � UE Tx Power

2.1.4 Test Scenario

2.1.4.1 Non-Colocation (Face to Face UMTS &GSM)

2.6 MHz band guard between GSM900 and UMTS900 frequency channel

UMTS reuse GSM ARFCN 1-25 where GSM900 BCCH set to ARFCN 26

Step Action Expected result

11

Switch UMTS 900 OFF : Check GSM

Perform GSM voice call

Call test at 3 locations, with drive test from GSM site

GSM Measurements without interferer: RxLev, RxQual, MS Tx power,

GSM UL RSSI

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22

Switch UMTS900 ON : Check GSM

UMTS DL load = 95% OCNS (simulate max transmit power from UMTS)

Perform UMTS call, Perform GSM voice call


GSM Measurements with interferer: RxLev, RxQual, MS Tx power,

GSM UL RSSI

33

Switch GSM Cell OFF: Check UMTS


Perform UMTS voice call

Call test at 3 location, with drive test from UMTS site

UMTS Measurements without interferer: Rscp, Ec/No, UE Tx power

UMTS UL RSSI

44

Switch GSM900 ON : Check UMTS




UMTS Measurements with interferer: Rscp, Ec/No, UE Tx power

UMTS UL RSSI

2.1.5 Test Result Non Co-location Scenario

With this scenario, UMTS is measured at AnjirPasar sector3 where all other UMTS cells are locked.

GSM is measured at AnjirSerapat sector1 (BCCH 26). 3 locations reveal as picture below

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2.1.5.1 STATIC LOCATION TEST RESULT

2.1.5.1.1 GSM DL & UMTS UL& DL test Result

2.1.5.1.1.1 Location1

2.1.5.1.1.2 Location2

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2.1.5.1.1.3 Location3

2.1.5.1.2 GSM UL test Result: Spectrum Analyser

2.1.5.1.2.1.1 UMTS Call, No GSM call at ARFCN 26

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2.1.5.1.2.1.2 UMTS call, GSM call at ARFCN 26

2.1.5.2 STATIC LOCATION RESULT ANALYSIS

2.1.5.2.1 Downlink measurement at GSM

From RXQUAL/ RXLEV measurement at 3 locations,

GSM location1 (far from GSM site) shows error result (RXLEV is too different when no/with UMTS) due

MS not in the same position, at end of coverage where signal variant is high, the MS location is

important. But the overall result of measurement where UMTS call is on shows that “there is no

impact to GSM DL quality”

2.1.5.2.2 Uplink measurement at GSM (spectrum analyser)

The above result from spectrum analyser, show that “no spurious signal from UMTS to GSM signal

channel 26”

2.1.5.2.3 Uplink/Donwlink measurement at UMTS

UMTS uplink RSSI is measured by NodeB, but also broadcasts from NodeB to Ue. With UE trace tool,

the uplink RSSI can be read from NodeB broadcast channel.

� From 3 location measurements: Uplink RSSI doesn’t show different impact when call

with/without GSM

� Downlink measurement on UMTS quality didn’t show different impact when call with/without

GSM (Ec/Io, SIR to reveal UMTS quality)

From this trial scenario, we can’t see impact on these inter-systems interference even without guard

band between 2 systems. But please note that the site distance is 9.2 Km and antenna height is

different on GSM and UMTS. The impact might be there if UMTS and GSM distance is less and

Antenna is face to face with nearly height level.

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As well the test has few sampling measurement where we need more samples (with different type

of services) to evaluate the impact of inter-system interference. This limitation is due to time

constraint. For future test, these constraints have to be well organise to get accuracy of the result

2.1.5.3 Drive Test result

2.1.5.3.1 GSM Drive Test Result, MS lock to AnjirSerapat1

GSM RXLEV: No UMTS GSM RXLEV: with UMTS

GSM RXQUAL: No UMTS GSM RXQUAL: with UMTS

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2.1.5.3.2 UMTS Drive Test Result: Ue lock to AnjirPasar3

UMTS Ec/Io: No GSM UMTS Ec/Io: with GSM

UMTS RSCP: No GSM UMTS RSCP: with GSM

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UMTS UeTXPWR: No GSM UMTS UeTXPWR: with GSM

2.1.5.4 DRIVE TEST RESULT ANALYSIS

From drive test, only downlink measurement is focus, area by area comparison to reveal any

interference impact when measure with/without inter-system on air from mobility

GSM measurement

GSM measurement look to be error (better result at cell edge when there is UMTS call) , this is due to

MS location is different ( no external MS antenna).When the MS is at cell edge the signal variant

become high so as MS location become important.

But from measurement with UMTS call, the plot show non-degradation at area near to middle cell

(we should not consider cell edge in this case due to error measurement from MS location)

UMTS measurement

UMTS measurement on signal quality Ec/Io and signal level RSCP shows no different when GSM is

on/off.

But UeTXPWR where area near to the UMTS site shows some different when GSM is off/on. This could

be due to MS power algorithm, the further investigation with more sampling measurement is

necessary in this case.

Same as static location result , this trial scenario can’t see impact on inter-systems

interference even without guard band between 2 systems. But please note that the site

distance is 9.2 Km and antenna height is different on GSM and UMTS. The impact might be

there if UMTS and GSM distance is less and Antenna is face to face with nearly height level.

As well the test has few sampling measurement where we need more samples (with

different type of services) to evaluate the impact of inter-system interference. This

limitation is due to time constraint. For further interference test, these constraints have to be

well organise to get accuracy result

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2.2 Interference Tests for collocated GSM900 & UMTS900 Sites

2.2.1 Test Purpose

The test purpose is to measure the impact of quality degradation and interference level when GSM900 and UMTS900 are collocated (re-use of GSM design for UMTS 900 deployment)

Two frequency spacing are proposed to be tested: 2.6 (no guard band) &2.8 (one channel guard band)

2.2.2 Test Requirement

Environment: Live/ static test

� Collocated UMTS900 and GSM900 sites. GSM BCCH set to ARFCN=26, UMTS frequency reuse GSM ARFCN 1-25 ( 2.6 MHz frequency spacing)

� Case of collocated UMTS900 and GSM900 sites, the solution will be to deactivate the power control on 2G to simulate a non-collocated Uplink scenario.

� Load generation: UMTS DL load: OCNS 85%

Equipments & tools:

� UMTS UE traces (X-CAL drive test tool) � GSM UE traces (TEMS drive test tool) � CTb/OT cell trace (RNC traces) � Spectrum analyser HP 8594E

2.2.3 Test Configuration

2.2.3.1 Conf1: GSM900/UMTS900 interference tests GSM900 as victim

� GSM call perform voice calls in different location : Middle , Far from site. Measure GSM quality � UMTS Call perform voice calls at the same with GSM location: Middle , Far from site � GSM Call perform at same location & drive test is realised up to cell edge. Measure GSM quality

2.2.3.2 Conf2: GSM900/UMTS900 interference tests UMTS900 as victim

� UMTS call perform voice call in different locations: Middle, Far from site. Measure UMTS quality � GSM Call perform voice calls at the same with UMTS location: Middle , Far from site � UMTS Call perform at same location & drive test is realised up to cell edge. Measure UMTS quality

2.2.3.3 Test Output

For GSM UE victim: � RxQual vs. Rxlev � UE Tx Power � UL RSSI on GSM BTS

For UMTS UE victim: � CPICH EcNo vs CPICH RSCP � DL SIR � UL RSSI report by UMTS NodeB � UE Tx Power

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2.2.4 Test Scenario

2.2.4.1 Co-location UMTS&GSM

2.6 MHz band guard between GSM900 and UMTS900 frequency channel.

UMTS reuse GSM ARFCN 1-25 where GSM900 BCCH set to ARFCN 26


11

Switch UMTS 900 OFF : Check GSM

Perform GSM voice call


GSM Measurements without interferer: RxLev, RxQual, MS Tx power,

GSM UL RSSI

22

Switch UMTS900 ON : Check GSM


Perform UMTS call, Perform GSM voice call


GSM Measurements with interferer: RxLev, RxQual, UE Tx power,

GSM UL RSSI

33

Switch GSM Cell OFF: Check UMTS




UMTS Measurements without interferer: Rscp, Ec/No, UE Tx power

UMTS UL RSSI

44

Switch GSM900 ON : Check UMTS




UMTS Measurements with interferer: Rscp, Ec/No, UE Tx power

UMTS UL RSSI

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2.2.5 Test Result Co-location Scenario

2.2.5.1 Fix location Test result

2.2.5.1.1 GSM DL & UMTS UL& DL test Result

2.2.5.1.1.1 Location4 (Middle Cell)

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2.2.5.1.1.2 Location5 (Cell Edge)

2.2.5.1.2 GSM UL test Result: Spectrum Analyser

Due to unable to capture UMTS signal at LNA port of NodeB(signal is too low) , the measurement is

captured at spectrum analyser antenna port only.

2.2.5.1.2.1.1 UMTS Call, No GSM call at ARFCN 26

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2.2.5.1.2.1.2 UMTS Call, GSM call at ARFCN 26

2.2.5.2 STATIC LOCATION RESULT ANALYSIS

2.2.5.2.1 Downlink measurement at GSM

From RXQUAL/ RXLEV measurement, overall result of measurement where UMTS call is on shows that

“there is no impact to GSM DL quality”

2.2.5.2.2 Uplink measurement by spectrum analyser

The above result from spectrum analyser, show that “no spurious signal from UMTS to GSM signal

channel 26” : this measured at spectrum antenna port due to failure of capture UMTS Uplink signal

at LNA port of NodeB

2.2.5.2.3 Uplink/Downlink measurement at UMTS

UMTS uplink RSSI is measured by NodeB, but also broadcasts from NodeB to Ue. With UE trace tool,

the uplink RSSI can be read from NodeB broadcast channel.

� From different location measurements: Uplink RSSI doesn’t show different impact when call

with/without GSM

� Downlink measurement on UMTS quality didn’t show different impact when call with/without

GSM (Ec/Io, SIR to reveal UMTS quality)

From this trial scenario, we can’t see impact on these inter-systems interference even

without guard band between 2 systems for this co-location scenario. But please note that

antenna heigh separation is ~ 10 m. The impact might be there if UMTS and GSM antenna

separation distance is less. Isolation distance need to be compute and test with different

separation distance is suggestion for co-location scenario.



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well organise to get more accuracy on the result

2.2.5.2.4 GSM Drive Test Result

GSM RXQUAL : No UMTS GSM RXQUAL: with UMTS

GSM RXLEV: No UMTS GSM RXLEV: with UMTS

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2.2.5.2.5 UMTS Drive Test Result

UMTS drive with PS UL384 to simulate maximum UE TX power for this scneario

UMTS Ec/Io : No GSM UMTS Ec/Io: with GSM

UMTS RSCP: No GSM UMTS RSCP: with GSM

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UMTS UeTXPWR: No GSM UMTS UeTXPWR: with GSM

2.2.5.3 DRIVE TEST RESULT ANALYSIS

From drive test, only downlink measurement is focus, area by area comparison to reveal any

interference impact when measure with/without inter-system on air

GSM measurement

GSM measurement on RXLEV/ RXQUAL show non-degradation when UMTS on/off.

UMTS measurement

UMTS measurement on signal quality Ec/Io and signal level RSCP shows no different when GSM is

on/off.

But UeTXPWR have error result due to PS UL384 is used during these test to simulate maximum Uplink

power. When the transfer stop the power decrease (power control), without continuous upload

transfer , the uplink UeTxpwr is inaccurate

Same as static measurement, the impact on inter-systems interference is unseen even

without guard band between 2 systems for this co-location scenario. But please note that

antenna height separation is ~ 10 m. The impact might be there if UMTS and GSM antenna

separation distance is less. Isolation distance need to be compute and test with different

separation distance is suggestion for co-location scenario.




well organise to get more accuracy on the test

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2.3 GSM UL Interference QoS Monitoring

From GSM performance monitoring tool, UL interference measurement indicator is available. This

indicator is help to evaluate uplink signal measure at BTS. Each interference band indicates range

of uplink signal level.

On date 16-17 Jan when Interference was performed, the interference measurement at BTS uplink

shows no different (no higher interference band during test)

Band1 =-110 to -105, Band2 = -105 to -100, Band3=-100 to -90, Band4 = -90 to <-47, Band5> -47

anjir_pasar3 IF_band1 IF_band2 IF_band3 IF_band4 IF_band5

01/01/2008 171 0 0 0 0

02/01/2008 178 0 0 0 0

03/01/2008 174 0 0 0 0

04/01/2008 167 0 0 0 0

05/01/2008 175 0 0 0 0

06/01/2008 172 0 0 0 0

07/01/2008 180 0 0 0 0

08/01/2008 178 0 0 0 0

09/01/2008 181 0 0 0 0

10/01/2008 175 0 0 0 0

11/01/2008 148 22 0 0 0

12/01/2008 170 0 0 0 0

13/01/2008 166 0 0 0 0

14/01/2008 171 0 0 0 0

15/01/2008 175 0 0 0 0

16/01/2008 167 0 0 0 0

17/01/2008 170 0 0 0 0

18/01/2008 160 0 0 0 0

19/01/2008 171 0 0 0 0

20/01/2008 157 11 0 0 0

anjir_serapat1 IF_band1 IF_band2 IF_band3 IF_band4 IF_band5

01/01/2008 187 0 0 0 0

02/01/2008 186 0 0 0 0

03/01/2008 187 0 0 0 0

04/01/2008 184 0 0 0 0

05/01/2008 181 2 0 0 0

06/01/2008 182 0 0 0 0

07/01/2008 175 0 2 0 0

08/01/2008 186 0 0 0 0

09/01/2008 183 0 0 0 0

10/01/2008 182 0 0 0 0

11/01/2008 177 2 0 0 0

12/01/2008 177 2 0 0 0

13/01/2008 178 1 0 0 0

14/01/2008 183 0 0 0 0

15/01/2008 133 0 0 0 0

16/01/2008 63 1 0 0 0

17/01/2008 66 0 0 0 0

18/01/2008 63 1 0 0 0

19/01/2008 65 0 0 0 0

20/01/2008 65 0 0 0 0

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3 UMTS900 /CDMA800 INTERFERENCE TEST

3.1 Test Purpose

The test purpose is to measure the impact of transmit spurious signal lelve from CDMA800 over UMTS receive signal

3.2 Test Requirement

Environment: Live Network � Collocated UMTS900 and CDMA800 sites are mandatory for Downlink test cases and suitable for

Uplink tests.

Equipments & tools:

� UMTS UE traces (X-CAL trace tool) � Spectrum analyser HP 8594E

3.3 Test Configuration

� Connect UMTS TX port to live Antenna at Siolatama site by reusing of GSM existing antenna � Measure RX signal after LNA port at UMTS nodeB ( Uplink band measurement) � Connect/ Disconnect TX band pass filter in CDMA Tx. Measure RX signal at NodeB

3.4 Test Result

From configuration, the impact only measured by Spectrum analyser, no UMTS or CDMA call

checking during this test.

� Spectrum measurement below shows that without TX band pass install at CDMA, the

spurious signal is very strong. At 890 MHz where UMTS UL band start , the spurious signal

measure is -79 dBm

� After installed Tx band pass at CDMA, the CDMA spurious signal disappeared from UMTS

LNA.

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Spectrum measurement after LNA at NodeB : without Tx band pass filter

Spectrum measurement after LNA at NodeB: with Tx band pass filter

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4 RF SERVICE COVERAGE TEST

The test purpose is to measure UMTS900 coverage with different service and configuration.

Site Configuration: All sector set P-CPICH to 35 dBm for coverage test

1. Anjir Pasar sector1 : Antenna Height ~54 m (10 m lower than GSM), with 2 degree tilt

2. Anjir Pasar sector3 : Antenna Height ~54 m (10 m lower than GSM), with 6 degree tilt

3. Anjir Serapat sector1 : Antenna Height ~44 m (20 m lower than GSM), with 6 degree tilt

RF service coverage test is distributed into 2 parts during this trial:

1. RF service between 2 coverage cell (soft handover). The test was performed by drive testing

from site Anjir Pasar sector3 to site Anjir Serapat sector1 in this case.

2. RF service till end of coverage cell. Drive testing at Anjir Pasar sector1 with different type of

service, including GSM BCCH measurement for comparison is performed for this case.

4.1 UMTS Service Coverage (soft handover)

Voice call is perform with drive testing between 2 sites. From coverage plot below, it shows that the

coverage is continuous between these NodeBs where 2 sites distance is about 9.2 KM. Anjir_Pasar

coverage is better than Anjir_Serapat due to higher antenna height configuration.

RSCP Ec/Io

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4.2 UMTS Service Coverage (end of cell)

The test purpose is to evaluate UMTS coverage compare with GSM coverage.

Due to different antenna configuration the comparison may be unfair to UMTS but this is to have an

idea of how UMTS coverage could be when reused of existing GSM network configuration.

4.2.1 Voice call service coverage

From below drive test result, it show that UMTS coverage end is about 7.8 KM, but at 7 Km the

quality start to degrade where this area the call should be handover to GSM in order to secure the

call. UMTS coverage for this case is guaranteed at 7 KM distance

RSCP Ec/Io

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4.2.2 GSM BCCH coverage

Due to GSM is activating BS DL power control, the best way to get GSM coverage by RXLEV

measurement at BCCH only, BCCH GSM is set to 43 dBm. GSM coverage is about 8.5 KM distance

where 7.5 Km the signal is start to degrade below -100 dBm

Documents

UMTS900 Trial RF Test Report Ed1a