ETSI TR 102 615 V1.1.1 (2008-02)

PowerLine Telecommunications (PLT); PlugtestsTM 2007 on coexistence between PLT modem systems; Test cases

DTR/PLT-00023

General Information

• Status: Published
• Publication Date: 13-Feb-2008
• Technical Committee: PLT - Powerline Telecommunications
• Current Stage: 12 - Completion
• Due Date: 09-Jan-2008
• Completion Date: 14-Feb-2008

Standards Content (Sample)

ETSI TR 102 615 V1.1.1 (2008-02)
Technical Report


PowerLine Telecommunications (PLT);
Plugtests™ 2007 on coexistence
between PLT modem systems;
Test cases

---------------------- Page: 1 ----------------------
2 ETSI TR 102 615 V1.1.1 (2008-02)



Reference
DTR/PLT-00023
Keywords
ACCESS, intelligent homes & buildings,
powerline, QoS
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.

© European Telecommunications Standards Institute 2008.
All rights reserved.

TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI

---------------------- Page: 2 ----------------------
3 ETSI TR 102 615 V1.1.1 (2008-02)
Contents
Intellectual Property Rights.4
Foreword.4
Introduction .4
1 Scope.5
2 References.5
2.1 Normative references.5
2.2 Informative references.5
3 Abbreviations.6
4 General Test Conditions, Traffic Generation and Traffic Monitoring .6
4.1 Coupling and Decoupling of the PLC-Signal.7
4.2 Shielding of the Test Set-up .8
5 Tests with one PLT system .8
5.1 CDCF Timing - Comparison with Simulation Model .8
5.2 CDCF - PSD.9
5.3 CDCF Timing - Sync Point and AC line cycle.10
5.4 CDCF Timing - Burst.11
6 Tests with more PLT systems .12
6.1 CDCF reception in dependence of attenuation.12
6.2 CDCF reception in the presence of a narrowband disturbance source .13
6.3 CDCF reception in the presence of a broadband disturbance source .14
6.4 Coexistence - Slot allocation.15
6.5 Coexistence - Frequency allocation.16
6.6 System Join Process .17
6.7 Throughput.18
6.8 Hidden Node Situation .19
History .21

ETSI

---------------------- Page: 3 ----------------------
4 ETSI TR 102 615 V1.1.1 (2008-02)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Report (TR) has been produced by ETSI Technical Committee PowerLine Telecommunications (PLT)
STF 332.
The present document describes test cases prepared for a Plugtests™ event on coexistence between PLT modem
systems.
Introduction
The Plugtests on the coexistence between PLT modem systems are performed to confirm the robustness of the CDCF as
defined in PLT WI20 [PLT39_TD_19a1.zip] and to verify the protocol by tests on prototypes of different vendors, as
available. A Special Task Force (STF) 332 was established to model the CDCF mechanism on sub MAC layer, to
define suitable test cases for the Plugtests and to perform and report the results of the Plugtests. The aim of the Plugtests
is to verify the coexistence protocol given in the PLT WI20 drafts.
The tasks of the STF with regard to PLT WI20 Plugtests are in detail:
• Describe and identify Plugtests to be done;
• Prepare test beds for the Plugtests;
• Perform the Plugtests; and
• Report the results of the Plugtests.
ETSI

---------------------- Page: 4 ----------------------
5 ETSI TR 102 615 V1.1.1 (2008-02)
1 Scope
The test cases defined in the present document are designed to verify the coexistence mechanism as defined in
PLT-WI20 drafts. They are applicable to PLT modems (Access and Inhouse), in which the coexistence mechanisms are
at least partly implemented. Since a monitorable reference device is not yet available, it is required that the PLT
modems used for the tests have built-in monitoring abilities.
Results of the verification of the proposed mechanism may be used to improve coexistence between PLT systems.
2 References
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
For online referenced documents, information sufficient to identify and locate the source shall be provided. Preferably,
the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the
reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the
method of access to the referenced document and the full network address, with the same punctuation and use of upper
case and lower case letters.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
Not applicable.
2.2 Informative references
[1] IEC 61000-4-4: "Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst immunity test".
ETSI

---------------------- Page: 5 ----------------------
6 ETSI TR 102 615 V1.1.1 (2008-02)
3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Alternating Current
BNC Bayonet Nut Connector
CDB coupling/decoupling box
CDCF Commonly-Distributed Co-ordination Function
FDM Frequently Division Multiplexing
MTU Maximum Transmission Unit
PLT PowerLine Telecommunications (http://www.etsi.org/plt)
PSD Power Spectral Density
RF Radio Frequency
TCP Transmission Control Protocol
UDP User Datagram Protocol
4 General Test Conditions, Traffic Generation and
Traffic Monitoring
Usually the PLT modems build a bridge between the powerline as transport media and a standard communication line
(e.g. ethernet). For the tests, in which traffic is to be generated and to be monitored, the use of the public domain tool
IPERF (http://dast.nlanr.net/) will be used. The participant should bring with him the required computer with
appropriate interfaces for his modem.
In case of UDP traffic the following settings apply:
stream type packet size data rate
UDP 1 500 byte (MTU) 10 % to 100 % of maximum for PLT system as determined
in pretests in steps of 10 %

Since TCP uses congestion mechanisms, which may limit the traffic due to packet losses, some tests will be performed
using TCP instead of UDP. This may be more realistic for quality perceived by the user.
Since a monitorable reference device is not yet available, it is required that the PLT modems used for the tests have
built-in monitoring abilities for the coexistence mechanism. This monitoring should include:
• Master or Slave
• synchronised with CDCF frames
• which resources do a modem try to acquire
• which S- or D-slot(s) are allocated
• which priority slots are reserved
• amount of traffic is received or transmitted
• amount of traffic within the own system
The coexistence mechanism also needs to be stimulated by generation of specific CDCFs. This stimulation should allow
to realise
• Access / Inhouse (if possible)
• high / low priority streaming
• S-Slot, D-Slot, tacit D-slot allocation
• passive / active resynchronisation
ETSI

---------------------- Page: 6 ----------------------
7 ETSI TR 102 615 V1.1.1 (2008-02)
The participant is free to select the tests listed in the following sections he wants to perform. For each given selected
tests, the part of it that can not be performed will be noted and the rest will be performed.
Many of the coexistence tests require two PLT systems of different vendors or types. These tests can only be performed
in agreement with all participants concerned.
4.1 Coupling and Decoupling of the PLC-Signal
The central element of the modular artificial test environment is a coupling/decoupling box (CDB) as shown in
figure 4.1. It consists of a decoupling filter (>60 dB for both symmetric and asymmetric signals) between power plug
and mains connector and a coupling network (two capacitors, transformer and several resist
...