ETSI TS 103 430 V1.1.1 (2016-05)

PowerLine Telecommunications (PLT); Specification on coexistence of VDSL2 and PLT modems in customer premises; Spectral management of PLT and VDSL2 transceivers

DTS/PLT-00042

General Information

• Status: Published
• Publication Date: 02-May-2016
• Technical Committee: PLT - Powerline Telecommunications
• Current Stage: 12 - Completion
• Due Date: 23-May-2016
• Completion Date: 03-May-2016

Standards Content (Sample)

ETSI TS 103 430 V1.1.1 (2016-05)






TECHNICAL SPECIFICATION
PowerLine Telecommunications (PLT);
Specification on coexistence of VDSL2 and PLT
modems in customer premises;
Spectral management of PLT and VDSL2 transceivers

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2 ETSI TS 103 430 V1.1.1 (2016-05)



Reference
DTS/PLT-00042
Keywords
powerline, VDSL2

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3 ETSI TS 103 430 V1.1.1 (2016-05)
Contents
Intellectual Property Rights . 4
Foreword . 4
Executive summary . 4
Modal verbs terminology . 4
Introduction . 4
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 6
3 Definitions and abbreviations . 7
3.1 Definitions . 7
3.2 Abbreviations . 7
4 Configuration of VDSL2 gateway and PLT network in customer premise . 7
4.1 Introduction . 7
4.2 DSL and PLT Channel Coupling Model . 8
4.3 Analysis of the PHY layers of PLT and DSL . 9
5 Reference models . 10
5.1 Generalized reference model . 10
5.2 Details of the interfaces . 11
6 General approach . 11
6.1 Overview of PLC the interference mitigation mechanism . 11
6.1.1 Overview . 11
6.2 Device discovery . 12
6.2.1 Overview . 12
6.3 Device measurement . 13
6.3.1 Overview . 13
6.4 Device configuration . 13
6.4.1 Overview . 13
6.5 Primitives supporting coexistence protocol . 13
6.6 Description of primitives . 13
History . 15

ETSI

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4 ETSI TS 103 430 V1.1.1 (2016-05)
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 (https://ipr.etsi.org/).
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 Specification (TS) has been produced by ETSI Technical Committee Powerline Telecommunications
(PLT).
The present document is a deliverable covering the coexistence of Powerline Telecommunication transceivers with
Very high speed Digital Subscriber Line transceivers in customer premises.
The present document on coexistence of VDSL2 and PLT is aligned on Recommendation ITU-T G.9979
Amendement 1 [i.5].
Executive summary
The overlapping of frequency bands between DSL and PLT is causing mutual interferences raising the issue of EMC.
The present document specifies reference models and functionality of a mechanism to mitigate interference caused by
in-home powerline devices to xDSL (implementing access Recommendations like Recommendation ITU-T G.993.2 [2]
and Recommendation ITU-T G.9701 [i.4]) and vice versa. It is defined as a pointer document to the Recommendation
ITU-T G.9977 (2016) [1].
Addressing the coexistence problems of PLT and DSL operating in customer environments, the present document
describes a coordination of both the xDSL access and in-home powerline transmission by an arbitration function (AF)
which allows optimizing the performance of each part of the system in order to meet the throughput requirements to the
end customer across both in-home and xDSL access networks by appropriately configuring parameters of xDSL and/or
PLC devices based on a coordination policy whenever this policy is available.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
Over the past decades, broadband technologies for access networks and home networking have seen an increasing level
of improvements to meet consumers expectations in speed and services.
The demand for higher bit rate data services from customer side is promoted by high-speed Internet access and many
forthcoming innovative services as UHD video streaming. This demand become possible with the deployment of DSL
technology as well as the extension to DSL vectoring and bonding.
Recent advances in power line communications (PLT) have made it popular for in-home networking. This makes PLT a
source of interference for digital subscriber line (DSL) networks within the home environment.
ETSI

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5 ETSI TS 103 430 V1.1.1 (2016-05)
The present document proposes interference mitigation solutions that allow the coexistence of in-home PLT and DSL
networks.
In addition, the present document proposes two interference mitigation solutions that enhance the coexistence of in-
home PLT and DSL networks.
The interactions between a Digital Subscriber Line (DSL) access network and Home Networks based on Powerline
Telecommunication (PLT) have been reported during past years as PLT modems are widely used for IPTV distribution
in a home.
PLT networks and DSL networks use some of the same frequencies in the unlicensed band from 2 - 88 MHz. PLT
devices and DSL devices may often be placed in relative proximity to each other and there are concerns that this could
present interference.

ETSI

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6 ETSI TS 103 430 V1.1.1 (2016-05)
1 Scope
The present document defines a method to improve the coexistence by mitigating the interference between the DSL
transceiver and PLT transceiver operating in overlapping frequency band but on different cables.
In-home PLT networks operate over the same spectrum as DSL networks. This increases the likelihood of crosstalk
between PLT and DSL communications systems. For instance, two home networks that operate at the same frequency
range, one over copper twisted-pairs (138 kHz - 30 MHz) and the other over power lines (1,8 MHz - 30 MHz ), would
interfere with each other.(ETSI TR 102 930 [i.1]).
The DSL and PLT interference environment is discussed in more detail. Communication standards for PLT, have been
developed with mechanisms that prevent any interference between various systems within the home environment.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] Recommendation ITU-T G.9977 (02-2016): "Mitigation of Interference between DSL and PLC".
[2] Recommendation ITU-T G.993.2 (01-2015): "Very high speed digital subscriber line transceivers
2 (VDSL2)".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI TR 102 930 (V1.1.1): "PowerLine Telecommunications (PLT); Study on signal processing
improving the coexistence of VDSL2 and PLT".
[i.2] ETSI-PLUGTEST (May 25-29, 2009): "DSL and in-door PLT coexistence Tests Report" from
LANPARK.
[i.3] BroadBand ForumTR-069: "CPE WAN Management Protocol".
NOTE: Available at http://www.broadband-forum.org/cwmp.php.
[i.4] Recommendation ITU-T G.9701: "Fast access to subscriber terminals (G.fast) - Physical layer
specification".
[i.5] Recommendation ITU-T G.9979 (2014) Amendment 1 (02-2016): "Implementation of the generic
mechanism in the IEEE 1905.1a - 2014 Standard to include applicable ITU-T Recommendations".
ETSI

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7 ETSI TS 103 430 V1.1.1 (2016-05)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
Arbitration Function (AF): entity that facilitates coordination between the DSL and PLC systems in order to reduce
interference on the basis of coordination policy by appropriately configuring parameters of the DSL and PLC devices
NOTE: The coordination policy is expected to be determined and provided by the operator. In case such policy is
not determined or provided by the operator, the AF works according to a predefined default policy.
Customer Premises Equipment (CPE): customer premises equipment implementing xDSL functionality that is
compliant with at least one of the Recommendation ITU-Ts of G.99x and G.970x series
Centralized Control Mode (CCM): mode of a PLC network in which devices do not exchange information directly
with the AF but via the PLC-NC
Distributed Control Mode (DCM): mode of a PLC network in which PLC devices exchange information directly with
the Arbitration Function
PLC Network Controller (PLC-NC): in CCM, one of the PLC devices in the PLC network that is assigned to control
all other devices in the network
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AF Arbitraty Function
CPE Customer Premises Equipment
DMT Discrete MultiTone
DSL Digital Subscriber Line
DSM Dynamic Spectrum Management
EMC ElectroMagnetic Compatibility
FDD Frequency Division Duplexing
IPTV Internet Protocol TeleVision
ITU-T International Telecommunication Union - Telecommunication
LAN Local Area Network
MAC Medium Access Controler (Layer 2)
MIMO Multiple Input Multiple Output
NMS Network Management System
NT NeTwork
OFDM Orthogonal Frequency Division Multiplexing (multi-carrier transmission)
OPCODE OPeration CODE
PHY PHYsical layer /transmission (Layer 1)
PLC PowerLine Communication
PLT PowerLine Telecommunication
RGW Residential GateWay
TV TeleVision
UHD Ultra High Definition (4K video)
VDSL2 Second generation of Very high speed Digital Subscriber Line
4 Configuration of VDSL2 gateway and PLT network in
customer premise
4.1 Introduction
DSL and PLT technologies are based on OFDM transmission and
...