Test Report VDSL2 and in-door PLT · PDF file4.9 VDSL T RANSMISSION CHAIN ... layer statistics reported by the DSLAM and by analyzing the impact ... LEGRAND Transformateur d’isolement

VDSL2 and in-door PLT coexistence LAN09AF033 Ed.02 July 16, 2009 Page 1/41

© 2009 – Copyright Laboratoire des Applications Numériques pour ETCI/CTI

Test Report -

VDSL2 and in-door PLT coexistence May 25-29, 2009

Customer Test package LAN Ref. File

ETSI PLT50_TD07r4_PLUGTEST_VDSL2_and_in-door_PLT_coexistenc.doc LAN09AF033

Initiation Date Description of modification Ed. V. BUCHOUX June 12, 2009 creation 00 T. DOLIGEZ June 23, 2009 Updated version after ETSI/CTI review 01 T. DOLIGEZ July 16, 2009 Updated version after Plugtests™ participants review 02

Realised by Checked by Approved by Name Frédéric BADAGER Vincent BUCHOUX Thierry DOLIGEZ Date July 03, 2009 July 16, 2009 July 16, 2009

Sign



TABLE OF CONTENTS 1 INTRODUCTION ........................................................................................................................................................4 1.1 REFERENCE DOCUMENTS......................................................................................................................................4 1.2 TEST LABORATORY ...............................................................................................................................................5 1.3 AUTHORS .............................................................................................................................................................5 2 TEST CAMPAIGN OVERVIEW......................................................................................................................................6 2.1 LIST OF TESTS ......................................................................................................................................................6 2.2 TESTS CAMPAIGN SCHEDULE.................................................................................................................................6 3 TEST EQUIPMENTS DESCRIPTION ..............................................................................................................................8 3.1 POWER AND PHONE CABLES..................................................................................................................................8 3.1.1 Power cables ..............................................................................................................................................................................................8 3.1.2 Phone cables..............................................................................................................................................................................................8 3.2 LINE IMPEDANCE STABILISATION NETWORK (LISN) ................................................................................................8 3.3 LINE ISOLATION TRANSFORMER (LIT) ....................................................................................................................8 3.4 OTHER POWERLINE EQUIPEMENTS.........................................................................................................................8 3.4.1 Powerline Coupler ......................................................................................................................................................................................8 3.4.2 Coaxial attenuators.....................................................................................................................................................................................9 3.4.3 PHY-Station Box.........................................................................................................................................................................................9 3.4.4 Low-Pass Filter...........................................................................................................................................................................................9 3.5 SPECTRUM/NETWORK ANALYZER ...........................................................................................................................9 3.6 TRAFIC GENERATION & ANALYSIS...........................................................................................................................9 3.6.1 PC-Chariot / Console..................................................................................................................................................................................9 3.6.2 PC-Chariot / End-point 1 ............................................................................................................................................................................9 3.6.3 PC-Chariot / End-point 2 ............................................................................................................................................................................9 3.7 VDSL2 EQUIPMENT ............................................................................................................................................10 3.7.1 VDSL2 DSLAM.........................................................................................................................................................................................10 3.7.2 VDSL2 CPE..............................................................................................................................................................................................10 3.7.3 VDSL2 line simulator ................................................................................................................................................................................10 3.7.4 VDSL2 crosstalk generator ......................................................................................................................................................................10 3.7.5 PC for VDSL2 CPE management ............................................................................................................................................................10 3.7.6 VDSL2 filters.............................................................................................................................................................................................10 3.7.7 Phone model ............................................................................................................................................................................................10 3.8 VIDEO GENERATION ............................................................................................................................................11 3.9 VIDEO PROBING AND ANALYZING EQUIPEMENT .....................................................................................................11 3.9.1 Video analyzer / probing...........................................................................................................................................................................11 3.9.2 PC hosting Spirent TestCenter Application & Reporter............................................................................................................................11 3.10 PLT DEVICES...................................................................................................................................................11 4 SET-UP AND CONFIGURATION .................................................................................................................................12 4.1 PHY-MEASUREMENTS SET-UP.............................................................................................................................12 4.2 PERFORMANCE TESTS SET-UP.............................................................................................................................13 4.3 CABLING ............................................................................................................................................................15 4.3.1 Methodology.............................................................................................................................................................................................15 4.3.2 Cabling of PHY Measurements Test Bench.............................................................................................................................................16 4.3.3 Cabling of PERF Tests Bench..................................................................................................................................................................16 4.4 LISN CONFIGURATIONS.......................................................................................................................................17 4.5 VDSL2 CONFIGURATION.....................................................................................................................................18 4.5.1 VDSL2 profiles..........................................................................................................................................................................................18 4.5.2 Crosstalk VDSL2 noises...........................................................................................................................................................................18 4.6 TRAFFIC GENERATION (FOR PHY-MEASUREMENTS) .............................................................................................19 4.6.1 Description................................................................................................................................................................................................19 4.6.2 Tests scripts .............................................................................................................................................................................................19 4.7 VIDEO GENERATION (PERFORMANCE TESTS)........................................................................................................22 4.7.1 Description................................................................................................................................................................................................22 4.7.2 Location of the video file...........................................................................................................................................................................23 4.8 VIDEO PROBING & ANALYSIS ...............................................................................................................................23 4.9 VDSL TRANSMISSION CHAIN (PERF TEST BENCH) ..............................................................................................24 4.10 PERFORMANCE TESTS AUTOMATION AND REPORTING ...........................................................................................25 4.10.1 Sequencing of the PERF tests .................................................................................................................................................................26 4.10.2 Format of the VDSL2 statistics results files..............................................................................................................................................27



4.10.3 Format of the video tests results (STC-VQA reporting)............................................................................................................................29 5 PHY – PHYSICAL MEASUREMENTS ........................................................................................................................31 5.1 LIST OF TESTS DONE DURING THE PLUGTESTS™..................................................................................................31 5.1.1 Tests based on the Test Plan [1]..............................................................................................................................................................31 5.1.2 Extra-tests ................................................................................................................................................................................................31 5.2 RESULTS............................................................................................................................................................32 5.2.1 Impact of the length of co-localized cables ..............................................................................................................................................32 5.2.2 Impact of the space between cables ........................................................................................................................................................33 5.2.3 Impact of the type of cable .......................................................................................................................................................................34 5.2.4 Summary ..................................................................................................................................................................................................35 5.3 ACCESSING THE PHY TESTS RESULTS ................................................................................................................35 6 PERF – PERFORMANCE MEASUREMENTS ..............................................................................................................36 6.1 LIST OF TESTS....................................................................................................................................................36 6.1.1 Tests based on the Test Plan [1]..............................................................................................................................................................36 6.1.2 Extra-tests ................................................................................................................................................................................................38 6.2 ACCESSING THE PERF TESTS RESULTS ..............................................................................................................39 6.2.1 VDSL2 detailed tests results ....................................................................................................................................................................40 6.2.2 VIDEO detailed tests results.....................................................................................................................................................................40 7 FINDINGS ...........................................................................................................................................................41 8 DESCRIPTION OF THE PACKAGE DELIVERY ..............................................................................................................41



1 INTRODUCTION This document is the test rapport following the organization of the VDSL2 and in-door PLT coexistence event that took place in Laboratoire des Applications Numériques, Tauxigny (France) from May 25th to May 29th 2009. The goal of this test event, as defined by the ETSI TC PLT, was to investigate the coexistence of both PLT and VDLS2 technologies. More precisely, ETSI TC PLT group is willing to provide formal contribution to the following questions:

• Which degradations, on both technologies may arise? • What mechanisms can be implemented to improve coexistence?

This event was prepared within the ETSI TC PLT group, with technical exchanges with the ETSI TM6 group. The project itself started in October 2008. The main steps of this project are listed below:

• Oct. 2008 – Apr. 2009 : Test Plan definition – Within PLT group / Exchanges with TM6 group – Ed.08 of the Test Plan approved the 29th of April 2009

• Jan. 2009 – May. 2009 : Event preparation – VDSL2 set-up (installation & automation) – Video set-up – Test bench #1 and #2 cabling

• 25–29 May 2009: the Plugtests™ event • 15 June 2009: Draft Test Report + Plugtests™ feedback to ETSI TC PLT.

This document explains how the tests were conducted and how to retrieve the tests results within the result package delivered by LAN to ETSI. This report addresses the following sections:

• A short introduction is given in section §1, including the reference document (test plan and slides presented to TC PLT the 15th of June, 2009).

• An overview of the Plugtests™ is presented in §2. • Section §3 lists all the test equipments used during the Plugtests™. • Section §4 describes the setups and the various configurations built for this Plugtests™. • Section §5 provides the list of PHY-measurements done, as well as the location of the test results. • Section §6 provides the list of PERF-measurements done, as well as the location of the test results. • Section §7 provides the findings of the testing event. • Section §8 describes the package delivered to ETSI (report and results).

1.1 REFERENCE DOCUMENTS

[1] Test Plan, “VDSL2 and in-door PLT coexistence. ETSI Plugtests™ Event. May 25-29, 2009. Test Plan”, Ed.08, April 29th, 2009. ETSI Ref. PLT50_TD07r4_PLUGTEST_VDSL2_and_in-door_PLT_coexistence.doc

[2] Presentation TC PLT, “Plugtests™ feedback to ETSI PLT”, June 15th, 2009 ETSI Ref. PLT51_TD08_PlugtestsFeedback.pdf



1.2 TEST LABORATORY

Laboratoire des Applications Numériques (LAN) 165 rue Yves Chauvin Node Park Touraine 37310 TAUXIGNY FRANCE

Telephone: +33 247 432 500 Fax: +33 247 432 501 Email: [email protected] Web site: http://www.lanpark.eu

1.3 AUTHORS

Frédéric BADAGER, Test Engineer Telephone: +33 247 432 500 Email: [email protected] Vincent BUCHOUX, Technical Officer Telephone: +33 247 432 504 Email: [email protected] Thierry DOLIGEZ, Sales Director Telephone: +33 247 432 503 Email: [email protected]



2 TEST CAMPAIGN OVERVIEW

2.1 LIST OF TESTS

The tests are described in the test plan [1]. Their objectives are recalled below:

– PHY-Measurements • Objective: The objective is to measure the noise level coupled from the PLT devices on the

DSL line for various types of cable, and various lengths and spaces between the PLT and DSL cables.

– Performance tests • Objective: Check the impact of the type of in-house DSL & PLT cables, the length & space

between DSL and PLT cables, the location of the PLT-device, the DSL splitter type, the presence or not of a PLT filter, on the VDSL2 and the PLT links, by analyzing the PHY layer statistics reported by the DSLAM and by analyzing the impact on the PLT traffic.

The exact content of tests performed during the test campaign is listed in two dedicated sections listed below: Section Test Item

4 PHY – Physical Measurements

5 PERF – Performance Tests

Table 1: List of tests

2.2 TESTS CAMPAIGN SCHEDULE

The final scheduling of the Plugtests™ was the following:



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3 TEST EQUIPMENTS DESCRIPTION

3.1 POWER AND PHONE CABLES

3.1.1 Power cables

Name Manufacturer Model

3G2.5 n/a Unshielded 2.5mm power cable

3G2.5+ Provided by Plugtests™ Participant Shielded 2.5mm power cable

3.1.2 Phone cables

Name Manufacturer Model

UNTW n/a Untwisted flat cable

CAT3 n/a 278 series (unshielded Cat 3 cable)

CAT5 n/a 298 series (unshielded Cat 5 cable)

CAT+ Provided by Plugtests™ Participant Shielded Grad 3/SAT cable

3.2 LINE IMPEDANCE STABILISATION NETWORK (LISN)

Two LISN variants were used for the different test benches as listed below: Name Manufacturer Serial #

FCC-LISN-50/250-252 FCC 01007

EM-7820 Electro-Metrics 2798

3.3 LINE ISOLATION TRANSFORMER (LIT)

Two LISN variants were used for the different test benches as listed below: Manufacturer Model Serial # Option

LANGLOIS 51/98 TSC98344 EN 60742

LEGRAND Transformateur d’isolement sec 42500 IEC 726 / NFC 52726

3.4 OTHER POWERLINE EQUIPEMENTS

The following powerline equipments were used during PERF tests when participants wanted to add an extra attenuation to the PLT channel (see P2.1 in § 6.1.1) for the evaluation of the impact of the coupled interferences (see set-up in § 4.2). This was done by coupling (see § 3.4.1) the end of the Power cable to 50ohms coaxial attenuators (see § 3.4.2) coupled to the PLT-RX using a PHY-Station box (see § 3.4.3) that was isolated from the mains by using a Low-Pass filter (see § 3.4.4).

3.4.1 Powerline Coupler

Manufacturer Model Serial #

LAN PLC-COUPLER-1 1



3.4.2 Coaxial attenuators


AGILENT 8494A MY42145069

AGILENT 8496A MY42144870

3.4.3 PHY-Station Box


LAN PHY station box ST0001

3.4.4 Low-Pass Filter


LAN PLC-LPF-1 LF0001

3.5 SPECTRUM/NETWORK ANALYZER

Manufacturer Model Serial # Calibration date

AGILENT 4395A JP1KE01517 February 2009

AGILENT E4402B MY45107006 July 2008

3.6 TRAFIC GENERATION & ANALYSIS

3.6.1 PC-Chariot / Console

Manufacturer Model Name Operating System Software

DELL DELL OPTIPLEX 745 INTEL(R) PENTIUM(R) D 3400MHz, 1GB RAM

D96NQW2J Windows XP Pro IXIA CHARIOT v6.50, BuildLevel : 70

3.6.2 PC-Chariot / End-point 1


DELL DELL VOSTRO 1000 2xAMD Turion 64 x2 mobile techn. TL-56

LANTEST-LAPTOP

Ubuntu Version 8.04 (hardy) Kernel Linux : 2 .6.24-23-generic

IXIA EndPoint Linux 32-bit (x86) v6.50 build level 395

3.6.3 PC-Chariot / End-point 2


HP Compaq DX2000 MT Intel Pentium 4 CPU 2.80 GHz

lantest2 Ubuntu Version 8.04 (hardy) Kernel Linux : 2 .6.24-16-generic

IXIA EndPoint Linux 32-bit (x86) v6.50 build level 395



3.7 VDSL2 EQUIPMENT

3.7.1 VDSL2 DSLAM VDSL2 DSLAM supporting 8c, 17a and 30a profiles has been provided by Plugtests™ participants.

3.7.2 VDSL2 CPE VDSL2 CPE supporting 8c, 17a and 30a profiles has been provided by Plugtests™ participants.

3.7.3 VDSL2 line simulator

Manufacturer Model Serial # Options Calibration date

Spirent Communications DLS8234 3000495 ADSL ADSL2 ADSL2+ VDSL2 July 2008

3.7.4 VDSL2 crosstalk generator

Manufacturer Model Serial # Options Calibration date

Spirent Communications DLS 5405 / DLS 5500 3000495 / 3000469 July 2008

3.7.5 PC for VDSL2 CPE management

Manufacturer Model Name Software

DELL DELL OPTIPLEX GX745 INTEL PENTIUM D CPU 3.40 GHz 1GB RAM

D96NQW2J

MICROSOFT WINDOWS XP version 2002 Service Pack 2

DELL E4402B MY45107006 July 2008

3.7.6 VDSL2 filters Two different kinds of VDSL2 filters were used: - In line filter provided by Plugtests™ participants. - Master splitter provided by Plugtests™ participants.

3.7.7 Phone model

Manufacturer Name

LAN ZFT



3.8 VIDEO GENERATION

Manufacturer Model Name OS Software #

DELL OPTIPLEX GX520 CHPRTS XPPro2002 SP3 WAMP / WINDSEND / FTPd

3.9 VIDEO PROBING AND ANALYZING EQUIPEMENT

3.9.1 Video analyzer / probing

Manufacturer Model Name Version Serial #

DELL SPT-2000A-HS Spirent Test Center v2.50 M07225005

3.9.2 PC hosting Spirent TestCenter Application & Reporter

Manufacturer Model Name OS Software #

DELL VOSTRO 400 - Intel Core 2 Duo CPU E4400 2 GHz - 2 GB RAM WINFR

Microsoft Windows XP Service Pack 2

Spirent TestCenter Application v2.50 Spirent TestCenter Reporter

3.10 PLT DEVICES

Two different technologies of PLT were provided by Plugtests™ participants. Both technologies were configurable in order to adjust the PSD mask.



4 SET-UP AND CONFIGURATION

4.1 PHY-MEASUREMENTS SET-UP

o Length of co-localized cables: 1m, 5m, 20m, 40m

o Space between cables: Contact, 1cm, 6cm, 20cm

o DSL cables: untwisted, CAT3, CAT5, CAT+

o Power cables: 3G2.5, 3G2.5+



4.2 PERFORMANCE TESTS SET-UP

o Length of co-localized cables: 1m, 5m, 20m

o Space between cables: Contact, 1cm, 6cm, 20cm

o DSL cables: untwisted, CAT3, CAT5

o Power cables: 3G2.5

The following figure shows the set-up used for the evaluation of the impact of coupled interferences (tests P1.1 to P1.4, see § 6.1).

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The following figure shows the set-up used for the evaluation of the impact of conducted interferences (tests P2.1 and P2.2, see § 6.1).

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Test set-up for the evaluation of the impact of PLT on VDSL2Test bed #2: Configuration for conducted interferences tests

Ed.00 – 01 July 2009

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© 2009 – Copyright LAN, Laboratoire des Applications Numériques

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4.3 CABLING

4.3.1 Methodology

The spacing between DSL & PLT cables was insured by the following cabling methodology:



4.3.2 Cabling of PHY Measurements Test Bench The schematic below shows the cabling of the PHY Measurements Test Bench.

4.3.3 Cabling of PERF Tests Bench The schematic below shows the cabling of the PERF Tests Bench.



4.4 LISN CONFIGURATIONS

Some LCL measurements were conducted with 4 variants so as to evaluate the unbalancing of each solution: - LISN (PHY Bench) - LISN (PHY Bench) with an extra unbalancing load (2.7Ω on phase line) - LISN (PERF Bench) - LISN (PERF Bench) with an extra unbalancing load (2.7Ω on phase line)

LCL LISN (PHY Bench)

-100-90-80-70-60-50-40-30-20-10

0

100000 1000000 10000000 100000000Hz

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LCL LISN (PERF Bench)

-100-90-80-70-60-50-40-30-20-10

0

100000 1000000 10000000 100000000Hz

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Fort the PHY test bench LISN, the unbalancing load has thus a much stronger effect and can bring up to 30dB more of unbalancing. This effect is weaker on the PERF Test Bench and thus all participants decided not to use this load in the PERF Test bench.



4.5 VDSL2 CONFIGURATION

4.5.1 VDSL2 profiles The VDSL2 profiles used during the tests are described below.

Service Parameter 8c 17a 30a min-bitrate-down 128 Kbps 128 Kbps 128 Kbps max-bitrate-down 150000 Kbps 150000 Kbps 150000 Kbps max-bitrate-up 150000 Kbps 150000 Kbps 150000 Kbps max-delay-down 8 8 8 max-delay-up 8 8 8 imp-noise-prot-dn 2 2 4 imp-noise-prot-up 2 2 4

4.5.2 Crosstalk VDSL2 noises The crosstalk VDSL2 noises were generated and supplied by Spirent with 1 adjacent VDSL2 interferer for all profiles (8c, 17a, 30a) and for all required loop lengths. The PSD of the VDSL2 noises used during the test campaign were measured and compiled in the given file below: “\PERF\VDSL\VDSL2_noises\ETSI_VDSL2_noise-PSD_under_100_Ohms-ed00.xls” An example of the noise PSD measurement is given below corresponding to profiles BA17a, loop length 1000m and profiles BA30a, loop length 150m, for both VTU-C (CO) and VTU-R (CPE) sides (VDSL2 CPE side).

BA17a-VTUR-1000m

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/Hz)

BA17a-VTUC-1000m

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BA30a-VTUR-150m

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0 5 000 000 10 000 000 15 000 000 20 000 000 25 000 000 30 000 000

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BA30a-VTUC-150m

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0 5 000 000 10 000 000 15 000 000 20 000 000 25 000 000 30 000 000

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4.6 TRAFFIC GENERATION (FOR PHY-MEASUREMENTS)

4.6.1 Description The traffic generation is performed using the Ixia Chariot traffic generator (v6.50) using TCP throughput and RTP over UDP scripts from Ixia. The details of each script are given in the dedicated sections below. The traffic generation uses 3 PCs:

• A Chariot console: this PC hosts the Ixia Chariot Console Software and is used to configure the two PCs (called Endpoints) which are involved in the traffic generating. The console also collects the test statistics from the two endpoints and calculates the achieved rates and/or test statistics.

• Two Chariot endpoints: these are the two PCs exchanging the test traffic through the powerline for the Point to Point tests, and reporting the test statistics to the console on a dedicated Ethernet link. Each of endpoints implements a test script and generates the traffic which is specified by the console PC. Both PCs are under Linux (Ubuntu) Operating System, which is an OS more suited for real-time applications.

It is important to note that the test traffic is separated from the traffic holding the test statistics using two separate NIC cards on each PC. Thus the test statistics information is not transmitted onto the test network (the powerline link).

4.6.2 Tests scripts The applied test scripts and the generated streams are defined in the section below for UDP and TCP protocols. The generated streams are 2 minute duration each. Location of the tests scripts The test scripts used during the PHY measurements campaign are located in the following path: \PHY \Traffic-scripts



UDP script The UDP stream is based on the IPTVv.scr script from Ixia which generates a RTP over UDP stream from the TX modem to the RX one. The choice of the RTPoUDP protocol was preferred as it involves less retransmission mechanisms than UDP and often allows getting better traffic rates on the PLT modems. This protocol is widely used for video or IPTV transmission. The traffic script is defined as follows:



TCP script The TCP stream is based on the Throughput.scr script from Ixia which generates a TCP stream from the TX modem to the RX one. The traffic script is defined as follows:



4.7 VIDEO GENERATION (PERFORMANCE TESTS)

4.7.1 Description The video generation was based on a PC server running the following applications: • WAMP V2.0 (www/Apache/MySWL/PHP server) • TFPTD32 (DHCP server) • PixStream WindSend v1.14 The video stream is transmitted is sent in MULTICAST by WinSend using a video file provided by participants for the Plugtests™. This video was transmitted from the video server and used as the video reference throughout the performance tests.



4.7.2 Location of the video file This video file is located in the following path: “\PERF \Video_File\”. Note that this video was not very useful to stress the system. It contained too many still pictures. Furthermore, the source file itself had some artefacts when switching from a video sequence to another one (this can be easily detected from the MOS-V note reported from the probe located at the output of the Video server (see below).

4.8 VIDEO PROBING & ANALYSIS

The video probing and analysis were based on the hardware and software solution Spirent Test Center designed and provided by Spirent. This tool has three components:

• The Spirent TestCenter chassis SPT-2000A-HS (v2.50) with 4 GE ports • A PC hosting the following applications :

o Spirent TestCenter Application v2.50 o Spirent TestCenter Reporter

Three ports among four of the STC are used in conjunction with Ethernet switches to probe and analyze the video stream at three different locations:

• “Carrier/DSLAM” side, i.e. on the same Ethernet link as the Video Server

• “VDSL CPE” side, i.e. on the same Ethernet link as the VDSL CPE (on its LAN interface)

• “Set-Top-Box” side, i.e. on the same Ethernet link as the VDSL CPE



4.9 VDSL TRANSMISSION CHAIN (PERF TEST BENCH)

A dedicated VDSL access transmission and analysis chain was setup for the PERF tests bench allowing the transmission of video.

This chain was made of:

• A Video stream generator

• A VDSL2 DSLAM

• A VDSL2 Line Simulator and Noise Generator

• A video analyzer (STC-VQA)

• An in-line filter (or a master splitter) connected to a load modelling the Telephone set.

• A VDSL2 CPE (IAD)

• The PLT under test (TX) connected to the power network isolated by filter, LIT & LISN.

Video stream generator VDSL2 DSLAM

VDSL2 Line Simulator

VDSL2 Noise Generator

STC-VQA

In-line filter

Phone model

LISN

PLT-TX

IAD

CPE MGMT



• The second PLT under test (RX) connected at the end of the 20m Power cable.

• A Set-Top Box

• A TV screen

• A set of 3 switches are also used to probe the IP-video stream at DSLAM, CPE and STB sides.

4.10 PERFORMANCE TESTS AUTOMATION AND REPORTING

The performance tests were partially automated. Especially, the control of the DSLAM, of the VDSL2 line simulator and of the VDSL2 noise generator was automated allowing the run of a set of tests (i.e. for all VDSL2 profiles and access loop lengths) for each specific topology (i.e. for each specific type of cable, length on co-localized cables and space between DSL and PLT cables, type of DSL filter, etc.). All the results are stored in Excel files. The following section describes the sequencing of the tests and Excel files produced by the automatic test platform. The format of the video analysis software is also described at the end of this section.

PLT-RX STB

TV



4.10.1 Sequencing of the PERF tests

Perf

orm

ance

test

s se

quen

cing

Ed.0

0 –

10 J

une

2009

© 2

009

– C

opyr

ight

LA

N, L

abor

atoi

re d

es A

pplic

atio

ns N

umér

ique

s

~15s

VDLS2 l

ine co

nfigu

ration

+ nois

e inje

ction

Openin

g the

VDSL2

link

VDSL2 m

odem

s

sync

hroniz

ed

Up

to 2

mn

2mn

2mn

2mn

Video a

ctiva

ted

(IGMP re

ques

t via

STB remote

ctrl)

Bet

wee

n 1m

n &

2m

n 15

s

VDSL2 st

atisti

cs re

porte

d (1)

VDSL2 st

atisti

cs re

porte

d (2)

VDSL2

statis

tics

report

ed (3

)

~15s

~10s

time

Che

ck L

OS

, CR

C...

Unplug

PLT

-TX &

PLT

-RX (c

ase 1

)

Plug P

LT-T

X & P

LT-R

X (cas

e 1)

Video u

p :

- Cas

e 1: V

DSL2 + P

LC

- Cas

e 2: V

DSL2 on

ly

End

of te

st (c

ase

2)En

d of

test

(cas

e 1)

Sta

rt of

test

(Cas

es 1

&2)

Conne

ct STB-E

TH cable

on P

LT-R

X

Plug PLT

-TX & P

LT-R

X

Activa

te Vide

o (IG

MP requ

est)

Start V

ideo A

nalys

is (ca

se 2)

~10sStar

t Vide

o Ana

lysis

(case

1)

Cas

e 1:

PLT

-TX

and

PLT-

RX

conn

ecte

d at

sta

rtC

ase

2: P

LT-T

X an

d PL

T-R

X di

scon

nect

ed a

t sta

rt



4.10.2 Format of the VDSL2 statistics results files This files has the following form:

o It has a synthesis excel sheet which summarizes all the test results and provides the

statistics of the VDSL link (bitrates, noise margins; CRCs, etc.). o The header of the synthesis sheet summarizes the test setup o All the other excel sheets give the carrier data reported during the achieved VDSL2 link, at

each step of the sequence (see § 4.10.1): bi, SNRi, gi, QLNi, HLOGi, tssi.

o These detailed result sheets have their name composed by

• the test section they are addressing : P0, P1-1, P1-1bis (see test plan [1])

• the used VDSL2 profile : 30a for instance

• the loop length : 150m

• the test phase within the test sequence they are addressing : init, phase 1, or phase 2 (depending on which test section from the test plan they are addressing, see [1])



An example of detailed result sheet is given below:



4.10.3 Format of the video tests results (STC-VQA reporting) The detailed video analysis results from the STC-VQA tool are available once the video date&time code has been retrieved in the Record column of the PERF test list. The video analysis results are compiled in the VIDEO directory: “\PERF\VIDEO” The files present in these directories have a “.db” extension and are of the following forms:

An example is illustrated below:

• Assuming a Video date&time code from 09-05-26 23:19:23 to 09-05-27 09:19:20.

• Then the video analysis of this sequence can be retrieved by taking the file which displays the end of the date&time code, i.e. : VQA_conf_1_Com_Seq_results_2009-05-27_09-19-20.db • This “.db” file can be opened and read following the installation of the Spirent TestCenter Results Reporter. This application will be made available by direct request to the following Spirent contacts:

Marc HOREM Systems Engineer SPIRENT Communications 21G rue Jacques Cartier, 78960 Voisins Le Bretonneux - France Tel Direct: +33 (0)1 6137 2264 - Mobile: +33 (0)6 8510 2863 Tel Stand: +33 (0)1 6137 2250 - Fax: +33 (0)1 6137 2251 E-mail: [email protected]



• Once the Results Reporter is installed then the .db file can be opened and displayed:

• By developing the directory hierarchy, one can then find the MOS-V called “VQA-MOS-AV-Interval” video analysis in the ETSI-Plugtest directory as shown above.

• The VQA-MOS-AV-Interval (audio and video) parameter is then displayed on the desired date&time sequence for the 3 given probes :

o Probe 1 Video Stream 1 : o Probe 2 Video Stream 1 : o Probe 3 Video Stream 1 :



5 PHY – PHYSICAL MEASUREMENTS

5.1 LIST OF TESTS DONE DURING THE PLUGTESTS™

5.1.1 Tests based on the Test Plan [1]

• PLT1

– All configurations were tested in UDP. 20cm space was tested also. – Standard ISN / extra-unbalanced ISN

• PLT2 – Extra-unbalanced ISN: All tests done – Standard ISN: 40m for contact & 1cm – PLT spectrum measured. – Some extra tests with PSD mask applied (limited power in the 30a DS bands) on PLT done. – PSD tests when terminator load is 2x50ohms grounded (located at the RX-side of the Powerline).

• High Quality cables – High quality DSL & PLT cables tested (20m and 40m / contact).

Note that the PHY measurements were taken with an erroneous 100 Ohm extra load put in parallel of the 50/100 ohm balun. A 3dB correction was applied afterwards to all the measurements.

5.1.2 Extra-tests Some extra tests were done using High quality Power and DSL cables. These tests were limited to contact, 20m and 40m co-localized cables. The results can be found in the file named “\PHY\PHY-tests results High quality cables Ed.00.xls”.

Parameter Value(s) Access copper line cable type & length N/A In-house copper line cable Untwisted, twisted Cat3 and Cat5 In-house power line cable ISN and forced unbalanced ISN Location of PLT Device (same power strip / IAD ?) N/A Length of co-localized DSL & PLT cables (m) 1, 5, 20, 40 m Space between DSL & PLT cables (cm) Contact, 1cm, 6cm, 20cm DSL filter type (splitter/inline filters) N/A PLT filter (yes/no) N/A VDSL2 configuration(s) N/A



5.2 RESULTS

Based on the set of results done during the Plugtests™, a short analysis was done to show the relevance of the measurements. It is presented hereafter. Note that all the statistics reported below were done by analysing the mean value of the PSD measured over the full 30MHz band. These statistics were done before removing the bands corresponding to the notches (see note in § 5.3). So, this may slightly differ from statistics done from the final PHY measurements provided with this report. Note also that each value reported below is an average (or a max, or a min) value of all the measurements done for the specific parameter. For example, is § 5.2.1 below, the Mean value of -135dBm/Hz reported for the 5m length of co-localized cables, is the mean value of all the mean PSD values measured for this length (for all spaces between cables, all types of cable, all PLT devices, etc.).

5.2.1 Impact of the length of co-localized cables

-140,00

-130,00

-120,00

-110,00

-100,00

1m 5m 20m 40m

Length of co-localized cables

PSD

leve

l (dB

m/H

z)

Mean of the means of the PSD measured over the full 30MHz band

Max of the means of the PSD

Min of the means of the PSD



5.2.2 Impact of the space between cables

-140,00

-130,00

-120,00

-110,00

-100,00

0cm 1cm 6cm 20cm

Space between cables

PSD

leve

l (dB

m/H

z)



5.2.3 Impact of the type of cable

-140,00

-130,00

-120,00

-110,00

-100,00

Untwisted Cat3 Cat5

Type of cables

PSD

leve

l (dB

m/H

z)



5.2.4 Summary

5.3 ACCESSING THE PHY TESTS RESULTS

The list of tests is located in the following path: “\PHY” Note that for confidentiality reasons, it has been decided to remove the following bands from the measurements. These bands correspond to the frequency notches of IARU Region 1 completed by an extra 100kHz band around the notches to suppress the transition bands of the notches.

Band from to 1 0,000 MHz 2,100 MHz 2 3,400 MHz 4,100 MHz 3 5,230 MHz 5,507 MHz 4 6,900 MHz 7,400 MHz 5 10,000 MHz 10,250 MHz 6 13,900 MHz 14,450 MHz 7 17,907 MHz 18,268 MHz 8 20,900 MHz 21,550 MHz 9 24,790 MHz 25,090 MHz

10 27,900 MHz 30,000 MHz

1 m 5 m 20 m 40 m 1 m 5 m 20 m 40 m 1 m 5 m 20 m 40 m

20 c

m

-140,5 -140,5 -135,7 -134,620

cm

-140,7 -139,1 -137,5 -135,6

20 c

m

-140,4 -140,4 -140,6 -140,6

6 cm -138,3 -127,1 -125,8 -126,2

6 cm -139,9 -138,9 -137,9 -136,2

6 cm -140,3 -140,2 -140,3 -139,9

1 cm -136,2 -124,6 -122,9 -123,4

1 cm -139,0 -135,1 -129,8 -129,8

1 cm -139,4 -139,0 -138,7 -139,1

0 cm -126,1 -123,1 -121,3 -121,1

0 cm -138,0 -130,2 -124,7 -121,2

0 cm -138,5 -138,7 -137,1 -136,8

CAT 5

Mean value < -138 dBm/Hz

Length Length Length

Spac

e

Spac

e

Untwisted CAT 3

-138 dBm/Hz < Mean value < -135 dBm/Hz-135 dBm/Hz < Mean value < -125 dBm/Hz-125 dBm/Hz < Mean value



6 PERF – PERFORMANCE MEASUREMENTS

6.1 LIST OF TESTS

The achieve tests during the Plugtests™ are listed in the sections below.

6.1.1 Tests based on the Test Plan [1] P0 Benchmark tests

These tests were done with direct connection of the Gateway (from the VDSL2 line simulator). Benchmark tests were also done with microfilter and 20m CAT3 cable connected. P1.1 Impact of coupled interferences: Initial tests with in-line filters

The sequencing used to run these tests is reported in the Excel file summarizing all the Perf tests done. Except contrary mentioned, Case 1 sequencing (see § 4.10.1) was used for these tests. P1.1bis Impact of coupled interferences: PLT devices connected after VDSL link is up

Parameter Value(s) Access copper line cable type & length PE-04mm / very short, short, medium and long

loops (see §6.1.2). In-house copper line cable untwisted cable In-house power line cable 2.5mm with ISN Location of PLT Device (same power strip / IAD) Separate power strip Length of co-localized DSL & PLT cables (m) 20m Space between DSL & PLT cables (cm) Contact, 1cm, 6cm and 20cm DSL filter type (splitter/inline filters) In line filters PLT filter (yes/no) No VDSL2 configuration(s) 3 configurations


loops (see §6.1.2). In-house copper line cable twisted pair CAT3 & untwisted cable In-house power line cable 2.5mm with ISN Location of PLT Device (same power strip / IAD) Separate power strip Length of co-localized DSL & PLT cables (m) 20m Space between DSL & PLT cables (cm) Contact, 1cm, 6cm and 20cm DSL filter type (splitter/inline filters) In line filters PLT filter (yes/no) No VDSL2 configuration(s) 3 configurations


loops (see §6.1.2). In-house copper line cable twisted pair CAT3 cable In-house power line cable No Location of PLT Device (same power strip / IAD) No Length of co-localized DSL & PLT cables (m) No Space between DSL & PLT cables (cm) No DSL filter type (splitter/inline filters) No PLT filter (yes/no) No VDSL2 configuration(s) 3 configurations



The sequencing used to run these tests is reported in the Excel file summarizing all the executed Perf tests. Except contrary mentioned, Case 2 sequencing (see § 4.10.1) was used for these tests. P1.2 Impact of coupled interferences: Additional tests with master splitter

The sequencing used to run these tests is reported in the Excel file summarizing all the executed Perf tests. Except contrary mentioned, Case 1 sequencing (see § 4.10.1) was used for these tests. P1.3 Impact of coupled interferences: Additional tests with other in-door wiring

P1.4 Impact of coupled interferences: Additional tests with PSD mask applied on PLT Some additional tests were run using a tuned PSD mask applied on the PLT modems in order to limit the PSD in the downstream VDSL2 bands (profile 30a). These tests are listed in the Excel file summarizing all the executed Perf tests. P2.1 Impact of conducted interferences: Initial tests

The test procedure initially planned in [1] has been modified. The following one, agreed by the participants, was applied: 1/ An extra attenuator (with variable attenuation) was placed in the PLT link (STB side).

Parameter Value(s) Access copper line cable type & length 150m In-house copper line cable No cable In-house power line cable 2.5mm with ISN Location of PLT Device (same power strip / IAD) Same Length of co-localized DSL & PLT cables (m) 0m Space between DSL & PLT cables (cm) N/A DSL filter type (splitter/inline filters) In-line filter PLT filter (yes/no) No VDSL2 configuration(s) 30a


loops (see §6.1.2). In-house copper line cable twisted pair CAT5 cable In-house power line cable 2.5mm with forced unbalance Location of PLT Device (same power strip / IAD) Separate power strip Length of co-localized DSL & PLT cables (m) 20m Space between DSL & PLT cables (cm) Contact DSL filter type (splitter/inline filters) In line filters PLT filter (yes/no) No VDSL2 configuration(s) 3 configurations


loops (see §6.1.2). In-house copper line cable twisted pair CAT3 & untwisted cable In-house power line cable 2.5mm with ISN Location of PLT Device (same power strip / IAD) Separate power strip Length of co-localized DSL & PLT cables (m) 20m Space between DSL & PLT cables (cm) Contact DSL filter type (splitter/inline filters) Master splitter PLT filter (yes/no) No VDSL2 configuration(s) 3 configurations



2/ After synchronization of the VDSL2 CP2 and video traffic up and running, the attenuation of the PLT link was increased until the video stream is OOS. The initial tests were run by plugging the power supply of the VDSL2 Gateway close to the PLT-TX (same power strip). The Additional tests (see below) were run by plugging the power supply of the VDSL2 Gateway at the filtered outlet of the PLT modem. P2.2 Impact of conducted interferences: Additional tests to evaluate the impact of PLT filters

6.1.2 Extra-tests Some extra tests were performed to provide an estimation of the PLT channel as well as the impact of the VDSL2 on the SNR of the PLT link during specific tests (coupled, P1.xx, and conducted, P2.xx tests). The related data are stored in the “PERF\Extra tests” directory.

Parameter Value(s) Access copper line cable type & length 150m In-house copper line cable No cable In-house power line cable 2.5mm with ISN Location of PLT Device (same power strip / IAD) Same Length of co-localized DSL & PLT cables (m) 0m Space between DSL & PLT cables (cm) N/A DSL filter type (splitter/inline filters) In-line filter PLT filter (yes/no) No VDSL2 configuration(s) 30a



6.2 ACCESSING THE PERF TESTS RESULTS

The list of achieved Performance tests is given in the excel file located at: “\PERF\PERF tests results.xls” This tests list is organized as follows:

• The test section is provided in the first columns. P1.1, P1.2, etc. • The test script used for the test is indicated in the second column. • Then the VDSL2 profiles and the topology of the test are listed. • The record information (where to find the results corresponding to the test) is indicated in the “Record”

column The record of the tests results are of two types and are organized as follows:

• VDSL: 1686 : indicates the index of the VDSL results • Video: from 09-05-28 18:56:35 to 09-05-28 19:05:15 : indicates the date and time extent of the test sequence during which video analysis was performed (by STC-VQA).



An additional column next to the Record column, called “Comments”, is present so as to log the comments from the test operator during each test sequence:

6.2.1 VDSL2 detailed tests results From the VDSL reference listed in the “Record” column, one can point to the results in the following way:

• The record of the VDSL index 1686 is stored in the file: “\PERF\VDSL\1686.xls”

6.2.2 VIDEO detailed tests results From the VIDEO references listed in the “Record” column, one can point to the results in the following way:

• The record of the Video index from 09-05-28 18:56:35 to 09-05-28 19:05:15 is stored in the file: “\PERF\VIDEO\VQA_conf_1_Com_Seq_results_2009-05-28_19-05-15.db”



7 FINDINGS This section provides the findings of this Plugtests™:

- Signal couplings between VDSL2 and in-door PLT technologies were confirmed. - These couplings were proved to be more important when using low quality cables. - These couplings were proved to be more important when using short distances between DSL and PLT

cables. - These couplings were proved to be more important when using long co-localized cables. - To prevent these couplings, it was proved that there is an impact to either use higher quality cables or

VDSL2 master splitters or PLT filters or PSD mask on the PLT devices.

8 DESCRIPTION OF THE PACKAGE DELIVERY The results outputs are delivered to ETSI and organized as follow:

- “\PHY” contains all the Physical measurements done during the Plugtests™. - “\PERF” contains all the Performance results.

o “\PERF\VDSL” contains all the VDSL2 statistics reported during the Performance tests. “\PERF\VDSL\VDSL2_noises” contains de measurements of the VDSL2 crosstalk noises

used for the performance tests. o “\PERF\VIDEO” contains all the Video records reported during the Performance tests.

“\PERF\VIDEO\Video_file” contains HD-video file used for the Performance tests. o “\PERF\Additional measurements” contains all additional measurements done during the

Performance tests. - “\REPORT” contains the test report.

Documents

Test Report VDSL2 and in-door PLT · PDF file4.9 VDSL T RANSMISSION CHAIN ... layer statistics reported by the DSLAM and by analyzing the impact ... LEGRAND Transformateur d’isolement