EN IEC 62056-8-12:2023

SLOVENSKI STANDARD
01-januar-2024
Izmenjava podatkov meritev električne energije - Niz DLMS/COSEM - 8-12. del:
Komunikacijski profil za omrežja širokega območja nizke porabe (LPWAN) (IEC
62056-8-12:2023)
Electricity metering data exchange - The DLMS/COSEM suite - Part 8-12:
Communication profile for Low Power Wide Area Networks (LPWAN) (IEC 62056-8-
12:2023)
Datenkommunikation der elektrischen Energiemessung - DLMS/COSEM - Teil 8-12:
Kommunikationsprofil für Low Power Wide Area Networks (LPWAN) (IEC 62056-8-
12:2023)
Échange des données de comptage de l’électricité – La suite
DLMS®/COSEM - Partie 8-12: Profil de communication pour réseaux
étendus à basse consommation (LPWAN) (IEC 62056-8-12:2023)
Ta slovenski standard je istoveten z: EN IEC 62056-8-12:2023
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
35.110 Omreževanje Networking
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 62056-8-12

NORME EUROPÉENNE
EUROPÄISCHE NORM November 2023
ICS 35.110
English Version
Electricity metering data exchange - The DLMS®/COSEM suite -
Part 8-12: Communication profile for Low-Power Wide Area
Networks (LPWANs)
(IEC 62056-8-12:2023)
Échange des données de comptage de l'électricité - La Datenkommunikation der elektrischen Energiemessung -
suite DLMS®/COSEM - Partie 8-12: Profil de DLMS®/COSEM - Teil 8-12: Kommunikationsprofil für Low
communication pour réseaux étendus à basse Power Wide Area Networks (LPWAN)
consommation (LPWAN) (IEC 62056-8-12:2023)
(IEC 62056-8-12:2023)
This European Standard was approved by CENELEC on 2023-11-01. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62056-8-12:2023 E

European foreword
The text of document 13/1877/CDV, future edition 1 of IEC 62056-8-12, prepared by IEC/TC 13
"Electrical energy measurement and control" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 62056-8-12:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-08-01
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-11-01
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62056-8-12:2023 was approved by CENELEC as a
European Standard without any modification.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 62056-1-0 - Electricity metering data exchange - The EN 62056-1-0 -
DLMS®/COSEM suite - Part 1-0: Smart
metering standardisation framework
IEC/TS 62056-1-1 2016 Electricity metering data exchange - The - -
DLMS®/COSEM suite - Part 1-1: Template
for DLMS®/COSEM communication profile
standards
IEC 62056-4-7 2015 Electricity metering data exchange - The EN 62056-4-7 2016
DLMS®/COSEM suite - Part 4-7:
DLMS®/COSEM transport layer for IP
networks
IEC 62056-5-3 2023 Electricity metering data exchange - The EN IEC 62056-5-3 2023
DLMS®/COSEM suite - Part 5-3:
DLMS®/COSEM application layer
1 2
IEC 62056-6-1 ED4 — Electricity metering data exchange - The EN IEC 62056-6-1 
DLMS®/COSEM suite - Part 6-1: Object
Identification System (OBIS)
IEC 62056-6-2 2023 Electricity metering data exchange - The EN IEC 62056-6-2 2023
DLMS®/COSEM suite - Part 6-2: COSEM
interface classes
IEC 62056-9-7 2013 Electricity metering data exchange - The EN 62056-9-7 2013
DLMS®/COSEM suite - Part 9-7:
Communication profile for TCP-UDP/IP
networks
IETF RFC 2460 1998 Internet Protocol - Version 6 (IPv6) - - -
Specification
IETF RFC 8376 - Low-Power Wide Area Network (LPWAN) - -
Overview
Under preparation. Stage at time of publication: 13/1852/CDV.
Under preparation. Stage at time of publication: prEN IEC 62056-6-1:2021.
IETF RFC 8724 - SCHC - Generic Framework for Static - -
Context Header Compression and
Fragmentation
IEC 62056-8-12 ®
Edition 1.0 2023-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electricity metering data exchange – The DLMS®/COSEM suite –

Part 8-12: Communication profile for Low-Power Wide Area Networks (LPWANs)

Échange des données de comptage de l’électricité – La suite DLMS®/COSEM –

Partie 8-12: Profil de communication pour réseaux étendus à basse

consommation (LPWAN)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 35.110  ISBN 978-2-8322-7574-0

– 2 – IEC 62056-8-12:2023 © IEC 2023
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 7
4 Targeted communication environments . 8
4.1 General . 8
4.1.1 Overview . 8
4.1.2 Security . 9
4.2 Use of the communications layers for this profile . 9
4.2.1 Information related to the use of the standard specifying the lower
layers (IEC TS 62056-1-1:2016, 5.1) . 9
4.2.2 Structure of the communication profiles (IEC TS 62056-1-1:2016, 5.2) . 9
4.2.3 Lower protocol layers and their use (IEC TS 62056-1-1:2016, 5.3) . 10
4.2.4 Service mapping and adaptation layers (IEC TS 62056-1-1:2016, 5.4) . 11
4.2.5 Registration and connection management (IEC TS 62056-1-1:2016, 5.5) . 11
4.3 Identification and addressing schemes (IEC TS 62056-1-1:2016, Clause 6) . 11
4.4 Specific considerations for the application layer service (IEC TS 62056-1-
1:2016, Clause 7) . 11
4.4.1 Overview (IEC TS 62056-1-1:2016, 7.1) . 11
4.4.2 Application Association establishment and release: ACSE services
(IEC TS 62056-1-1:2016, 7.2) . 12
4.4.3 xDLMS services (IEC TS 62056-1-1:2016, 7.3) . 12
4.4.4 Security mechanisms (IEC TS 62056-1-1:2016, 7.4) . 12
4.4.5 Transferring long application messages (IEC TS 62056-1-1:2016, 7.5) . 12
4.4.6 Media access, bandwidth and timing consideration (IEC TS 62056-1-
1:2016, 7.6) . 12
4.5 Communication configuration and management (IEC TS 62056-1-1:2016,
Clause 8) . 12
4.6 The COSEM application process (IEC TS 62056-1-1:2016, Clause 9) . 12
Annex A (informative) Examples . 13
A.1 Example 1: DLMS®/COSEM GET Service transported through LPWAN using
LoRaWAN technology . 13
A.2 Example 2: DLMS®/COSEM DataNotification Service transported through
LPWAN with SCHC fragments . 15
A.3 Example 3: DLMS®/COSEM Access Service transported through LPWAN
with SCHC fragments . 22
Bibliography . 30

Figure 1 – Communication architecture . 8
Figure 2 – LPWAN (SCHC) architecture outline . 9
Figure 3 – DLMS®/COSEM LPWAN communication profile . 10
Figure A.1 – The DLMS®/COSEM GET Service on LPWAN . 15

IEC 62056-8-12:2023 © IEC 2023 – 3 –
Table 1 – Client and server SAPs . 11
Table A.1 – Get Service example . 13
Table A.2 – Data-Notification Service with Profile Generic . 16
Table A.3 – Example – Access Service . 22

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICITY METERING DATA EXCHANGE –
THE DLMS®/COSEM SUITE –
Part 8-12: Communication profile for
Low-Power Wide Area Networks (LPWANs)

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 62056-8-12 has been prepared by IEC technical committee TC 13: Electrical energy
measurement and control. It is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
13/1877/CDV 13/1901/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
IEC 62056-8-12:2023 © IEC 2023 – 5 –
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 62056 series, published under the general title Electricity metering
data exchange – The DLMS®/COSEM suite, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

– 6 – IEC 62056-8-12:2023 © IEC 2023
ELECTRICITY METERING DATA EXCHANGE –
THE DLMS®/COSEM SUITE –
Part 8-12: Communication profile for
Low-Power Wide Area Networks (LPWANs)

1 Scope
This part of IEC 62056 describes the use of DLMS®/COSEM for Low-Power Wide Area
Networks (LPWANs). It specifies how the COSEM data model and the DLMS®/COSEM
application layer can be used over various LPWAN technologies using an adaptation layer
based on IETF RFC 8724, and in particular over LoRaWAN.
This profile is intended to be used with LPWANs as defined in IETF RFC 8724, in particular
LoRaWAN. Low-Power Wide Area Networks (LPWANs) are wireless technologies with
characteristics such as large coverage areas, low bandwidth, possibly very small packet and
application-layer data sizes, and long battery life operation. This document does not provide
functionality to manage the lower layers of the LPWANs.
This part of the DLMS®/COSEM suite specifies the communication profile for Low-Power Wide
Area Networks (LPWANs).
The DLMS®/COSEM LPWAN communication profiles use connection-less transport layer based
on the Internet Standard User Datagram Protocol (UDP) and Internet Protocol (IPv6).
The adaptation layer is based on IETF RFC 8724 which provides both a header
compression/decompression mechanism and an optional fragmentation/reassembly
mechanism. SCHC compression is based on static context with small context identifier to
represent full IPv6/UDP/COSEM wrapper headers. If required, SCHC fragmentation is used to
support IPv6 MTU over the LPWAN technologies.
This document follows the rules defined in IEC 62056-5-3:2023, Annex A, and in IEC 62056-1-0,
and IEC TS 62056-1-1:2016 for its structure. See also Annex A for examples.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 62056-1-0, Electricity metering data exchange – The DLMS®/COSEM suite – Part 1-0
Smart metering standardisation framework
IEC TS 62056-1-1:2016, Electricity metering data exchange – The DLMS®/COSEM suite –
Part 1-1: Template for DLMS®/COSEM communication profile standards
IEC 62056-4-7:2015, Electricity metering data exchange – The DLMS®/COSEM suite –
Part 4-7: DLMS®/COSEM transport layer for IP networks
IEC 62056-5-3:2023, Electricity metering data exchange – The DLMS®/COSEM suite –
Part 5-3: DLMS®/COSEM application layer

IEC 62056-8-12:2023 © IEC 2023 – 7 –
IEC 62056-6-1, Ed4 , Electricity metering data exchange – The DLMS®/COSEM suite –
Part 6-1: Object Identification System (OBIS)
IEC 62056-6-2:2023, Electricity metering data exchange – The DLMS®/COSEM suite –
Part 6-2: COSEM interface classes
IEC 62056-9-7:2013, Electricity metering data exchange – The DLMS®/COSEM suite –
Part 9-7: Communication profile for TCP-UDP/IP networks
IETF RFC 2460, Internet Protocol, Version 6 (IPv6) Specification. Edited by S. Deering, R.
Hinden. December 1998. Available from http://www.ietf.org/RFC /RFC 2460.txt
IETF RFC 8376, Low-Power Wide Area Network (LPWAN) Overview (available from
https://www.rfc-editor.org/rfc/pdfrfc/rfc8376.txt.pdf)
IETF RFC 8724, SCHC – Generic Framework for Static Context Header Compression and
Fragmentation (available from https://www.rfc-editor.org/rfc/rfc8724.html)
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62056-5-3:2023,
IETF RFC 8376 and IETF RFC 8724 apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.2 Abbreviated terms
AA Application Association
ABP Activation by Personalization
APDU Application Layer Protocol Data Unit
COSEM Companion Specification for Energy Metering
C/D Compression and Decompression
CSAP Client Service Access Point
DevAddr 32-bit non-unique identifier assigned to an end-device statically or dynamically
after a Join Procedure (depending on the activation mode)
DEVEUI IEEE EUI-64 used to identify the device during the Join Procedure
DLMS Device Language Message Specification
F/R Fragmentation and Reassembly
HDLC High-level Data Link Control
IP Internet Protocol
LNAP Local Network Access Point
NGW Network Gateway
PAN Personal Area Network
___________
Under preparation. Stage at the time of publication: IEC 13/1852/CDV

– 8 – IEC 62056-8-12:2023 © IEC 2023
RG Radio Gateway
SAP Service Access Point
SSAP Server Service Access Point
SCHC Static Context Header Compression and fragmentation, a generic framework
TCP Transmission Control Protocol
UDP User Datagram Protocol
4 Targeted communication environments
4.1 General
4.1.1 Overview
The DLMS®/COSEM communication profiles for LPWAN networks are intended for remote data
exchange on WAN between the HES and the end devices. From a DLMS® point of view, they
are connected directly to the HES via the G1 interface. All dotted elements are out of the scope
for this profile.
The functional smart metering reference architecture is shown in Figure 1.

Figure 1 – Communication architecture
End devices comprise application functions and communication functions. They can be utility
meters or any other kind of IoT devices. They use UDP/IPv6, SCHC
compression/decompression and fragmentation/reassembly features as specified in
IETF RFC 8724 and communicate with their related application server via the network gateway.
This profile maps to Figure 2.

IEC 62056-8-12:2023 © IEC 2023 – 9 –

Figure 2 – LPWAN (SCHC) architecture outline
4.1.2 Security
LPWAN technologies provide various lower layer security features. The application security
features provided by DLMS®/COSEM can be used over any of them.
4.2 Use of the communications layers for this profile
4.2.1 Information related to the use of the standard specifying the lower layers
(IEC TS 62056-1-1:2016, 5.1)
IETF RFC 8724 can be considered as an adaptation layer between UDP/IPv6 and the
underlying LPWAN technology. SCHC comprises two sublayers, compression and
fragmentation that are independent of the specific LPWAN technology. IETF RFC 8724
supports UDP/IPv6 and as such supports the DLMS®/COSEM UDP/IP profile. No adaptations
or limitations to IETF RFC 8724 or DLMS®/COSEM are expected to be required when using
SCHC to transport COSEM APDUs.
4.2.2 Structure of the communication profiles (IEC TS 62056-1-1:2016, 5.2)
See Figure 3.
– 10 – IEC 62056-8-12:2023 © IEC 2023

Figure 3 – DLMS®/COSEM LPWAN communication profile
4.2.3 Lower protocol layers and their use (IEC TS 62056-1-1:2016, 5.3)
4.2.3.1 Overview (IEC TS 62056-1-1:2016, 5.3.1)
Lower layers are any LPWAN lower layers that can transport SCHC packets as specified in
IETF RFC 8724.
NOTE IETF RFC 8376 provides an overview of LPWAN technologies that can be used for running IP in LPWANs.
ABP is not permitted when the LoRaWAN network is being applied. See also
IEC 62056-6-2:2023, 4.16.
IEC 62056-8-12:2023 © IEC 2023 – 11 –
4.2.3.2 Physical layer (IEC TS 62056-1-1:2016, 5.3.2)
The physical layer is out of the scope of this document; it is specific to the LPWAN technology
used.
4.2.3.3 MAC layer (IEC TS 62056-1-1:2016, 5.3.3)
The MAC layer is out of the scope of this document; it is specific to the LPWAN technology
used.
4.2.3.4 Adaptation layer (IEC TS 62056-1-1:2016, 5.3.4)
The adaptation layer is in accordance with IETF RFC 8724. It interfaces at the upper layer IPv6
as specified in IETF RFC 2460.
4.2.4 Service mapping and adaptation layers (IEC TS 62056-1-1:2016, 5.4)
The DLMS®/COSEM transport layer for IP networks performs the necessary binding of the
COSEM object model and the DLMS®/COSEM application layer in one part and the
communication lower layers in the other part. The service mapping is fully specified in the UDP-
DATA service, see IEC 62056-4-7:2015, 5.2.2.
4.2.5 Registration and connection management (IEC TS 62056-1-1:2016, 5.5)
Registration and connection management are specific to each LPWAN technol
...