oSIST prEN IEC 62056-8-11:2025

Electricity metering data exchange - The DLMS/COSEM suite - Part 8-11: Communication profile for Wi-SUN field area mesh networks

Datenkommunikation der elektrischen Energiemessung – DLMS/COSEM – Teil 8-11: Kommunikationsprofil für Wi-SUN field area mesh networks

Échange des données de comptage de l’électricité - La suite DLMS/COSEM - Partie 8-11: Profil de communication pour réseaux de terrain radio maillés Wi-SUN

Izmenjevanje podatkov za odbiranje stanja števcev - Sestav DLMS/COSEM - 8-11. del: Komunikacijski profil za območje polja mrežnega omrežja Wi-SUN

General Information

• Status: Not Published
• Public Enquiry End Date: 30-Mar-2025
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 35.110 - Networking
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: MEE - Equipment for electrical energy measurement and load control
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 20-Jan-2025
• Due Date: 09-Jun-2025
• Completion Date: 01-Apr-2025
• Ref Project: prEN IEC 62056-8-11:2025 - Electricity metering data exchange - The DLMS/COSEM suite - Part 8-11: Communication profile for Wi-SUN field area mesh networks

Overview

prEN IEC 62056-8-11:2025 defines a communication profile that enables the DLMS/COSEM application layer to operate over Wi-SUN Field Area Networks (FAN). In practical terms, the standard explains how electricity metering data exchange (DLMS/COSEM) is transported across IPv6-based mesh radio networks built on IEEE 802.15.4 (the Wi-SUN FAN profile). It clarifies addressing, layer usage and COSEM setup/diagnostic interface classes required to create a communication context on Wi-SUN mesh networks.

Key topics and requirements

• DLMS/COSEM over Wi-SUN FAN: Specifies that no additional adaptation layer is required because Wi-SUN supports IPv6/UDP and DLMS/COSEM already defines UDP/IP profiles.
• Network model: Targets the Field Area Network (interface “G”)-IPv6 wireless mesh consisting of Personal Area Networks (PANs), routers, leaf nodes and border routers (border router configuration is out of scope).
• Lower-layer technologies: Relies on the Wi-SUN FANSPEC (based on IEEE 802.15.4) and 6LoWPAN adaptations for IPv6.
• Routing and forwarding:
  • RPL (RFC 6550) is the mandatory Layer‑3 routing mechanism (non‑storing mode).
  • MHDS (Multi‑Hop Delivery Service) is an optional Layer‑2 “mesh under” mechanism; DLMS/COSEM operates regardless of which routing is used.
• Transport: Uses UDP/IPv6 (supports the DLMS/COSEM UDP/IPv6 profile). MPL (RFC 7731) and ICMPv6 control plane messages are supported by FANSPEC.
• Security: Wi‑SUN security suites are available within FANSPEC; the standard leaves choice of security mechanisms to implementers based on project needs.
• COSEM set‑up: Defines COSEM setup and diagnostic interface classes to manage Wi‑SUN-specific configuration (e.g., channel plan attributes), enabling efficient operation on lossy networks.

Applications and users

• Utilities deploying smart metering and AMI solutions over mesh radio networks.
• Meter manufacturers and firmware developers implementing DLMS/COSEM stacks for Wi‑SUN devices.
• System integrators, network architects and solution providers designing Field Area Networks (FAN) for electricity distribution and grid telemetry.
• Certification bodies and test labs validating interoperability of DLMS/COSEM over Wi‑SUN FAN.

Related standards and references

Key normative references include:

• IEC 62056 series (DLMS/COSEM core parts: 1-0, 4-7, 5-3, 6-1, 6-2, 9-7)
• Wi‑SUN FANSPEC and IEEE 802.15.4 (physical/MAC)
• Relevant IETF RFCs: RPL (RFC 6550), 6LoWPAN (RFC 4944, RFC 6282), ICMPv6 (RFC 4443), MPL (RFC 7731)

This profile helps unify electricity metering communications over Wi‑SUN mesh networks, enabling scalable, secure and interoperable smart metering deployments. Keywords: DLMS/COSEM, Wi‑SUN, Field Area Network, IPv6, 6LoWPAN, RPL, electricity metering, mesh networks, IEC 62056-8-11.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2025
Izmenjevanje podatkov za odbiranje stanja števcev - Sestav DLMS/COSEM - 8-11.
del: Komunikacijski profil za območje polja mrežnega omrežja Wi-SUN
Electricity metering data exchange - The DLMS/COSEM suite - Part 8-11:
Communication profile for Wi-SUN field area mesh networks
Échange des données de comptage de l’électricité - La suite DLMS/COSEM - Partie 8-
11: Profil de communication pour réseaux de terrain radio maillés Wi-SUN
Ta slovenski standard je istoveten z: prEN IEC 62056-8-11:2025
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.

13/1932/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62056-8-11 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-01-10 2025-04-04
SUPERSEDES DOCUMENTS:
13/1854/NP, 13/1862/RVN
IEC TC 13 : ELECTRICAL ENERGY MEASUREMENT AND CONTROL
SECRETARIAT: SECRETARY:
Hungary Mr Bela Bodi
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights
of which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Electricity metering data exchange – The DLMS/COSEM suite
Part 8-11: Communication profile for Wi-SUN field area mesh networks

PROPOSED STABILITY DATE: 2028
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
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13/1932/CDV -2- IEC CDV 62056-8-11 ED1 © IEC 2024
1 INTERNATIONAL ELECTROTECHNICAL COMMISSION
2 ____________ ®
5 Part 8-11: Wi-SUN Profile
7 FOREWORD
8 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
9 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
10 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
11 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical
12 Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
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15 liaising with the IEC also participate in this preparation. IEC collaborates closely with the International
16 Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two
17 organizations.
18 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
19 consensus of opinion on the relevant subjects since each technical committee has representation from all
20 interested IEC National Committees.
21 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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24 misinterpretation by any end user.
25 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
26 transparently to the maximum extent possible in their national and regional publications. Any divergence between
27 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
28 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
29 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
30 services carried out by independent certification bodies.
31 6) All users should ensure that they have the latest edition of this publication.
32 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
33 members of its technical committees and IEC National Committees for any personal injury, property damage or
34 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
35 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
36 Publications.
37 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
38 indispensable for the correct application of this publication.
39 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
40 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
41 IEC 62056-8-11 has been prepared by working group 14: Data exchange for meter reading
42 tariff and load control of IEC Technical Committee 13: Electrical energy measurement and
43 control. It is an International Standard.
45 Full information on the voting for its approval can be found in the report on voting indicated in
46 the above table.
47 The language used for the development of this International Standard is English.
48 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
49 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
50 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
51 described in greater detail at www.iec.ch/standardsdev/publications.

13/1932/CDV -3- IEC CDV 62056-8-11 ED1 © IEC 2024
52 The committee has decided that the contents of this document will remain unchanged until the
53 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
54 the specific document. At this date, the document will be:
55 • reconfirmed,
56 • withdrawn,
57 • replaced by a revised edition, or
58 • amended.
60 ACKNOWLEDGEMENT
61 IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates that it
62 contains colours which are considered to be useful for the correct understanding of its
63 contents. Users should therefore print this document using a colour printer.
65 DLMS® is a registered trademark of the DLMS User Association, Zug, Switzerland,
66 www.DLMS.com.
67 Wi-SUN®, Wi-SUN Alliance™, Wi-SUN FAN™ and the ® Logo are trademarks
68 owned by the Wi-SUN Alliance, Inc.
13/1932/CDV -4- IEC CDV 62056-8-11 ED1 © IEC 2024
71 CONTENTS
73 FOREWORD . 2
74 1 Scope . 5
75 2 Normative references . 5
76 2.1 Wi-SUN profile. 6
77 2.1.1 General . 6
78 2.1.2 Profile description . 6
79 2.1.3 Use of the communication layers for this communication profile . 7
80 2.1.4 Identification and addressing schemes . 12
81 2.1.5 Specific considerations for the application layer services . 12
82 2.1.6 Communication configuration and management. 14
83 2.1.7 The COSEM application process . 14
84 Bibliography . 15
86 Figure 1 – Communication architecture . 6
87 Figure 2 – Wi-SUN Architecture (Layer 3 routing) . 7
88 Figure 3 – Wi-SUN communication profile diagram . 8
89 Figure 4 – Service mapping . 10
91 Table 1 – FANSPEC to Wi-SUN setup IC attribute mapping . 11
92 Table 2 – Join states . 11
93 Table 3 – UDP port numbering . 12
13/1932/CDV -5- IEC CDV 62056-8-11 ED1 © IEC 2024
97 1 Scope
98 This standard specifies how the DLMS/COSEM application layer can be used over a Wi-SUN
99 FAN radio mesh network.
100 2 Normative references
101 The following documents are referred to in the text in such a way that some or all of their
102 content constitutes requirements of this document. For dated references, only the edition cited
103 applies. For undated references, the latest edition of the referenced document (including any
104 amendments) applies.
105 IEC 62056-1-0, Electricity metering data exchange - The DLMS/COSEM suite - Part 1-0: Smart
106 metering standardisation framework
107 IEC 62056-4-7:2015, Electricity metering – Data exchange for meter reading, tariff and load
108 control: DLMS/COSEM transport layers for IP networks
109 IEC 62056-5-3:2023, Electricity metering data exchange – The DLMS/COSEM suite –
110 Part 5-3: DLMS/COSEM application layer
111 IEC 62056-6-1:2023, Electricity metering data exchange – The DLMS/COSEM suite –
112 Part 6-1: Object identification system (OBIS)
113 IEC 62056-6-2:2023, Electricity metering data exchange – The DLMS/COSEM suite –
114 Part 6-2: COSEM interface classes.
115 IEC 62056-9-7, Electricity metering data exchange – The DLMS/COSEM SUITE – Part 9-7:
116 Communication profile for TCP-UDP/IP networks
117 ISO/IEC 8802-2:1998, Information technology – Telecommunications and information
118 exchange between systems – Local and metropolitan area networks – Specific requirements –
119 Part 2: Logical Link Control
120 3 Terms, definitions and abbreviations
121 3.1 Terms and definitions
122 For the purposes of this document, the terms and definitions given in IEC 62056-6-1, IEC
123 62056-6-2 and the following apply.
124 ISO and IEC maintain terminological databases for use in standardization at the following
125 addresses:
126 • IEC Electropedia: available at http://www.electropedia.org/
127 • ISO Online browsing platform: available at http://www.iso.org/obp
128 3.2 Abbreviated terms
Abbreviation Explanation
FAN Field Area Network
GBT General Block Transfer
MHDS Multi-hop Delivery Service
MPL Multicast Protocol for Low-power [and lossy networks]
PAN Personal Area Networks
RPL Routing Protocol for Low-power [and lossy networks]
13/1932/CDV -6- IEC CDV 62056-8-11 ED1 © IEC 2024
130 3.4 Wi-SUN profile
131 3.4.1 General
132 The Wi-SUN FAN™ is designed to fulfil the requirements of a ubiquitous network, but has no
133 applications specified to operate over it, so it is application agnostic. Similarly, DLMS/COSEM
134 does not specify a single set of lower layers to support the application layer and can be
135 described as transport agnostic.
136 The Wi-SUN FAN™ specification covers layers 1-4 of the OSI stack and handles UDP packets
137 and may handle TCP packets also. DLMS/COSEM already specifies a communication profile
138 for operating over TCP or UDP on IPv4 or IPv6 networks and thus there is no need for a specific
139 adaptation layer.
140 This profile defines how DLMS/COSEM operates over a Wi-SUN network and to provide
141 COSEM set up and diagnostic interface classes needed for creating a communication context
142 over a Wi-SUN network. It is designed to be used over lossy networks and for efficiency
143 assumes the use of 6LowPAN and RPL.
144 3.4.2 Profile description
145 3.4.2.1 Targeted communication environments
146 As per Figure 1, this communication profile is concerned with interface “G”.
149 Figure 1 – Communication architecture

13/1932/CDV -7- IEC CDV 62056-8-11 ED1 © IEC 2024
150 A Wi-SUN Field Area Network (FAN) is an IPv6 wireless mesh network based on IEEE
151 802.15.4, designed for critical infrastructure projects. Each Personal Area Network (PAN) is
152 designed to support thousands of router devices with a single border router. A FAN may consist
153 of many PANs allowing individual networks to scale to millions of devices, see Figure 2
154 Border Router configuration is out of scope from the application layer perspective in this profile.
Back End / Head End / Control Center Services
WAN Backhaul
Wi-SUN Field Area Network
PAN A PAN B PAN C
Layer 3
Border Router node Router Node Leaf Node
156 Figure 2 – Wi-SUN Architecture (Layer 3 routing)
158 3.4.3 Use of the communication layers for this communication profile
159 3.4.3.1 Information related to the use of the standard specifying the lower layers
160 The Wi-SUN FAN™ is a mesh network described in the [FANSPEC] from the Wi-SUN Alliance.
161 The [FANSPEC] is based on IEEE 802.15.4 and as such provides an interoperable profile or a
162 kind of companion specification to IEEE 802.15.4, specifying layers 1-4 of a communications
163 stack terminating at an IPv6 transport layer.
164 The [FANSPEC] supports UDP/IP and as such supports the DLMS/COSEM UDP/IPv6 profile
165 as per IEC 62056-9-1.
166 No adaptations or limitations to [FANSPEC] or to DLMS/COSEM are foreseen to be required
167 in use of [FANSPEC] to transport DLMS/COSEM APDUs.
168 3.4.3.2 Structure of the communication profiles
169 Figure 3 shows the communication profile with a data viewpoint.
170 [FANSPEC] specifies two mechanisms for routing which may occur: RPL as per RFC 6550
171 (“route over”) and Multi-Hop Delivery Service (MHDS) as per ANSI/TIA 4957.210 (“mesh
172 under”). Routing using RPL shall be supported within the Wi-SUN specification and MHDS

13/1932/CDV -8- IEC CDV 62056-8-11 ED1 © IEC 2024
173 routing is optional. There are no special considerations for DLMS/COSEM regardless of which
174 routing mechanism is implemented.
175 [FANSPEC] specifies the use of ICMPv6 as per RFC 4443 and RFC 6775 in the control plane.
176 [FANSPEC] specifies security mechanisms as shown in Figure 3. These have no impact on the
177 security provided by DLMS/COSEM and it is at the discretion of the implementer which security
178 suites and security mechanisms to implement depending on the project requirements.
179 [FANSPE
...