CLC/TS 50568-8:2015

Electricity metering data exchange - The DLMS/COSEM suite - Part 8: SMITP B-PSK PLC communication profile for neighbourhood networks - Including: The Original-SMITP PLC B-PSK communication profile, The Original-SMITP Local data exchange profile and The Original-SMITP IP communication profile

This Technical Specification contains 4 profile specifications: • the DLMS/COSEM SMITP B-PSK PLC Profile (clause 4) • the Original-SMITP B-PSK PLC Profile (clause 5) • the Original-SMITP IP Profile (clause 6) • the Original-SMITP Local data exchange profile (clause 7) The DLMS/COSEM SMITP B-PSK profile defines the use of the CLC/FprTS 50568-4 communication protocol and methods to access and exchange data modelled by the COSEM objects of EN 62056 6 2 via the EN 62056-5-3 application layer. This section forms part of the DLMS/COSEM suite as described in FprEN 62056-1-0. NOTE In the following, the expression Original-SMITP refers to the open protocol originally developed and maintained by the Meters and More Open Technologies association (see Foreword). The Original-SMITP Profiles define the access and exchange of data modelled by the Original-SMITP data model (clause 9) using the Original-SMITP application services (Clause 8). The “Original-SMITP” specifications refer to smart metering system specifications defined prior to the availability of the DLMS/COSEM SMITP B-PSK PLC Profile. The “Original-SMITP” specifications do not form part of the DLMS/COSEM suite of EN 62056.

Izmenjava podatkov pri merjenju električne energije - Niz DLMS/COSEM - 8. del: PLC-profil na podlagi modulacije SMITP B-PSK - Vključuje: izvirni profil na podlagi modulacije SMITP B-PSK, izvirni SMITP-profil lokalne izmenjave podatkov in izvirni SMITP IP-profil

General Information

• Status: Published
• Publication Date: 23-Apr-2015
• ICS: 35.240.60 - IT applications in transport
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: CLC/TC 13 - Equipment for electrical energy measurement and load control
• Drafting Committee: CLC/TC 13 - Equipment for electrical energy measurement and load control
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 24-Sep-2025
• Completion Date: 14-Oct-2025
• Mandate: M/441 - Standardisation mandate to CEN, CENELEC and ETSI in the field of measuring instruments for the development of an open architecture for utility meters involving communication protocols enabling interoperability
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: SIST-TS CLC/TS 50568-8:2015 - Electricity metering data exchange - The DLMS/COSEM suite - Part 8: PLC profile based on SMITP B-PSK modulation - Including: The Original-SMITP PLC profile based on SMITP B-PSK modulation,The Original-SMITP Local data exchange profile and The Original-SMITP IP profile

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2015
,]PHQMDYDSRGDWNRYSULPHUMHQMXHOHNWULþQHHQHUJLMH1L]'/06&26(0GHO
3/&SURILOQDSRGODJLPRGXODFLMH60,73%36.9NOMXþXMHL]YLUQLSURILOQDSRGODJL
PRGXODFLMH60,73%36.L]YLUQL60,73SURILOORNDOQHL]PHQMDYHSRGDWNRYLQL]YLUQL
60,73,3SURILO
Electricity metering data exchange - The DLMS/COSEM suite - Part 8: PLC profile based
on SMITP B-PSK modulation - Including: The Original-SMITP PLC profile based on
SMITP B-PSK modulation,The Original-SMITP Local data exchange profile and The
Original-SMITP IP profile
Ta slovenski standard je istoveten z: CLC/TS 50568-8:2015
ICS:
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
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.

TECHNICAL SPECIFICATION CLC/TS 50568-8

SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
April 2015
ICS 35.240.60; 91.140.50
English Version
Electricity metering data exchange - The DLMS/COSEM suite -
Part 8: SMITP B-PSK PLC communication profile for
neighbourhood networks - Including: The Original-SMITP PLC B-
PSK communication profile, The Original-SMITP Local data
exchange profile and The Original-SMITP IP communication
profile
This Technical Specification was approved by CENELEC on 2014-11-11.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC/TS 50568-8:2015 E

CONTENTS
Foreword . 9
Introduction . 10
1 Scope . 11
2 Normative references . 12
3 Acronyms and abbreviations, terms, definitions and notations . 13
3.1 Acronyms and abbreviations . 13
3.2 Terms and definitions . 14
3.3 Notations . 15
4 The DLMS/COSEM SMITP B-PSK PLC profile . 16
4.1 Structure of the profile . 16
4.2 Physical layer . 17
4.3 Data link layer . 17
4.4 Application to data link convergence layer . 17
4.5 Application layer . 27
4.6 Application process . 27
4.7 PLC network management . 28
4.8 Addressing . 31
4.9 System variables . 32
5 The Original-SMITP B-PSK PLC profile . 33
5.1 Overview . 33
5.2 Structure of the profile . 33
5.3 Physical layer . 34
5.4 Data Link layer . 35
5.5 Application layer . 35
5.6 SMITP Data model . 35
5.7 Application process . 35
6 The Original-SMITP IP profile . 43
6.1 Overview . 43
6.2 Structure of profile . 43
6.3 Physical and data link layers . 44
6.4 Transport and network layers . 44
6.5 Application layer . 48
6.6 SMITP Data model . 48
7 Original-SMITP Local Optical interface profile . 49
7.1 Overview . 49
7.2 Physical layer . 49
7.3 Data transmission protocol . 50
7.4 Packet’s protocol format . 51
7.5 Data Link Layer . 53
8 Discovery and registration services . 55
8.1 DLMS/COSEM over B-PSK discovery and registration services . 55
8.2 Original-SMITP over B-PSK discovery and registration services . 68

- 3 - CLC/TS 50568-8:2015
9 The Original-SMITP AL Services . 75
9.1 Application messages exchanged in distribution line networks . 75
9.2 Application messages exchanged in telecommunication public networks . 107
9.3 Encryption, Authentication and Playback Attacks Protection . 131
9.4 Enconding examples . 136
9.5 TCP/IP encapsulation example of SMITP TB Application layer message. 141
10 The Original-SMITP Data model . 144
10.1 Introduction . 144
10.2 Internal parameters . 145
10.3 Total energies . 148
10.4 Daily energies . 149
10.5 Load profiles and setting parameters . 150
10.6 Communication address and keys of authentication . 153
10.7 Meter identification information . 156
10.8 Temporal information . 157
10.9 Billing period information . 160
10.10 Software, Hardware and Security information . 162
10.11 Supply contract information . 165
10.12 Weekly tariff information . 169
10.13 Annual tariff information . 179
10.14 Public holidays programming . 181
10.15 Load modulation parameters . 182
10.16 Voltage interruption information . 185
10.17 Voltage variation information . 191
10.18 Control information . 197
10.19 Normal Status Word . 200
10.20 Extended Status Word . 202
10.21 Cut-off device control information . 204
10.22 Display management . 206
10.23 Download parameters . 208
10.24 Measurand profiles and parameters . 211
10.25 Synchronized measurand registers . 215
10.26 Event log management . 219
10.27 Billing data information . 221
10.28 Virtual billing data registers . 237
10.29 Time stamp of maximum power demand . 246
10.30 Measurand information . 252
10.31 Reading mode management . 255
10.32 Management of log’s events . 256
Annex A (informative) Node discovery procedure example using the DLMS/COSEM
SMITP B-PSK PLC profile . 261
A.1 Node Discovery . 261
A.1.1 Discover nodes directly accessible from the Concentrator . 261
A.1.2 Enable L1 meters to discover nodes not directly accessible from the
Concentrator . 263
A.1.3 Gathering discovered nodes from L1 meters . 263

A.1.4 Repeating the process with L1 meters until no new meters are
discovered . 265
A.2 Registration and routing management . 268
Annex B (informative) Node discovery procedure example using the Original-SMITP over
B-PSK PLC profile . 270
B.1 Node Discovery . 270
B.1.1 Discover nodes directly accessible from the Concentrator . 272
B.1.2 Enable L1 meters to discover nodes not directly accessible from the
Concentrator . 272
B.1.3 Gathering discovered nodes from L1 meters . 272
B.1.4 Repeating the process with L1 meters until no new meters are
discovered . 274
B.2 Registration and routing management . 278
Annex C (informative) SMITP specific definitions . 280
C.1 Management of reserved elements . 280
C.2 ECTL structure . 280
Annex D (normative) MIB and COSEM Set-up class interface . 281
D.1 General . 281
D.2 Types definition . 281
D.3 SMITP configuration attributes . 281
D.4 SMITP statistical attributes . 284
Annex E (informative) Specification of communication mode F for direct local data
exchange . 285
E.1 Introduction . 285
E.2 Mode F for direct local data exchange . 285
E.2.1 General . 285
E.2.2 Sign-on flow . 285
E.2.3 Physical layer primitives . 286
E.2.4 Timers . 287
E.3 Sign on example . 287
E.3.1 Identifier request -300 baud- (TP) . 287
E.3.2 Meter identifier response from meter -300 baud- . 287
E.3.3 Work mode selection -300 baud- (HHU) . 288

List of figures
Figure 1 – Document structure of CLC/TS 50568-8 . 11
Figure 2 – The DLMS/COSEM SMITP B-PSK PLC communication profile . 16
Figure 3 – Services of the COSEM to B-PSK convergence layer . 18
Figure 4 – Type 1 CLPDU format . 20
Figure 5 – Type 2 CLPDU format . 20
Figure 6 – Control field format . 21
Figure 7 – Sequence chart of a CL transfer not requiring segmentation . 22
Figure 8 – sequence chart of a CL transfer requiring segmentation at both sides . 23
Figure 9 – sequence chart of a CL transfer requiring segmentation using the unconfirmed
service . 25

- 5 - CLC/TS 50568-8:2015
Figure 10 – Meter’s state diagram . 31
Figure 11 – Reference communication architecture . 32
Figure 12 – Protocol stack for SMITP on PLC . 33
Figure 13 – Meter’s state diagram . 36
Figure 14 – Synchronization without protection . 37
Figure 15 – Synchronization with protection . 37
Figure 16 – Individual registers reading . 37
Figure 17 – Table registers reading . 38
Figure 18 – Individual registers writing . 38
Figure 19 – Table registers writing . 38
Figure 20 – Download procedure . 40
Figure 21 – Reference communication architecture . 43
Figure 22 – Protocol stack for SMITP on IP . 44
Figure 23 – Connection Opening . 47
Figure 24 – Data exchange . 47
Figure 25 – Connection Closing . 48
Figure 26 – Optical interface protocl stack . 49
Figure 27 – Messages sequence in connection procedure between meter and HHU . 50
Figure 28 – Connection request message . 52
Figure 29 – Identification response message . 52
Figure 30 – Acknowledgement message . 53
Figure 31 – MAC frame structure . 53
Figure 32 – Discover messages exchange . 58
Figure 33 – DiscoverReport messages exchange . 59
Figure 34 – TCTset messages exchange . 60
Figure 35 – DiscoverForward messages exchange . 61
Figure 36 – DiscoverForwardReport messages exchange . 63
Figure 37 – Status messages exchange . 64
Figure 38 – Register messages exchange . 65
Figure 39 – RegisterReport messages exchange . 66
Figure 40 – Deregister messages exchange . 67
Figure 41 – Ping.request messages exchange . 68
Figure 42 – Ping.response messages exchange . 68
Figure 43 – Subnets of the network . 75
Figure 44 – Request A-Node to transmit data to B-Node . 97
Figure 45 – Request A-Node to transmit data to B-Node: B-Node does not answer . 98
Figure 46 – Structure of messages exchanged in telecommunication networks . 108
Figure 47 – Structure of Message Header . 109
Figure 48 – Structure of Message Data . 109
Figure 49 – TB messages exchange in the On-Line transaction . 113
Figure 50 – Error condition during the transaction . 114

Figure 51 – TB messages exchange in the Off-Line transaction . 115
Figure 52 – Messages to cancel a transaction required by AMM system . 115

List of tables
Table 1 – Convergence layer error management scheme . 26
Table 2 – Example of message structure to be displayed . 42
Table 3 – Standard ASCII control characters . 51
Table 4 – Baud Rate coded values . 53
Table 5 – Discover service . 58
Table 6 – Discover service arguments . 58
Table 7 – DiscoverReport service . 59
Table 8 – DiscoverReport service arguments . 59
Table 9 – TCTset service . 60
Table 10 – TCTSet service arguments . 60
Table 11 – DiscoverForward service . 61
Table 12 – DiscoverForward service arguments . 61
Table 13 – DiscoverForwardReport service . 62
Table 14 – DiscoverForwardReport service arguments . 62
Table 15 – Status service . 63
Table 16 – Status service arguments . 63
Table 17 – Register service . 64
Table 18 – Register service arguments . 64
Table 19 – RegisterReport service . 65
Table 20 – RegisterReport service arguments . 65
Table 21 – Deregister service . 66
Table 22 – Deregister service arguments . 66
Table 23 – Ping service . 67
Table 24 – Ping service arguments . 67
Table 25 – Chl.Req 112 message . 69
Table 26 – Chl.Resp 113 message. 69
Table 27 – Address.Req 090 message . 70
Table 28 – TCT_Set.Req 092 message . 71
Table 29 – ReqAddr.Req 094 message . 71
Table 30 – Address.Resp 091 message . 72
Table 31 – ReqAddr.Resp 095 message . 73
Table 32 – Structure of Struct Address.Resp . 73
Table 33 – NACK.RESP 247 message . 74
Table 34 – Application messages in distribution line network . 77
Table 35 – Write.Req 004 message for clock synchronization . 79
Table 36 - Write.Req 004 message for general parameter writing . 79
Table 38 – WriteTab.Req 010 message . 81

- 7 - CLC/TS 50568-8:2015
Table 39 – WriteTab.Req 110 message . 82
Table 40 – SetTab.Req 014 message . 83
Table 41 – SetTab.Req 114 message . 84
Table 42 – Example of a table set command . 85
Table 43 – ResetTab.Req 016 message . 85
Table 44 – ResetTab.Req 116 message . 86
Table 45 – Read.Req 002 message . 87
Table 46 – Read.Resp 003 message . 87
Table 47 – ReadTab.Req 006 message . 88
Table 48 – ReadTab.Resp 007 message . 88
Table 49 – ReadTab.Req 008 message (block read) . 89
Table 50 – ReadTab.Resp 009 message (block read) . 89
Table 51 – GetTab.Req 030 message . 90
Table 52 – GetTab.Resp 031 message . 91
Table 53 – Authenticated Read.Req 102 message . 91
Table 54 – Authenticated Read.Resp 103 message . 92
Table 55 – Authenticated ReadTab.Req 106 message . 93
Table 56 – Authenticated ReadTab.Resp 107 message . 93
Table 57 – Authenticated ReadTab.Req 108 message (block read). 94
Table 58 – Authenticated ReadTab.Resp 109 message (block read) . 95
Table 59 – Authenticated GetTab.Req 130 message . 95
Table 60 – Authenticated GetTab.Resp 131 message . 96
Table 61 – SetIC.Req 040 message . 97
Table 62 – Authenticated SetIc.Req 140 message . 98
Table 63 – WriteTabIC.Req 042 message . 99
Table 64 – Authenticated WriteTabIc.Req 142 message . 100
Table 65 – Reprog 100 message (local programming) . 101
Table 66 – Reprog 101 message (broadcast programming) . 101
Table 67 – Command 018 message . 102
Table 68 – Authenticated Command 118 message . 102
Table 69 – A-Node ACK 253 message . 103
Table 70 – Authenticated A-Node ACK 243 message . 104
Table 71 – A-Node NACK 255 message . 104
Table 72 – Authenticated A-Node NACK 245 message . 104
Table 73 – Coding of field Value in A-Node Nack messages . 105
Table 74 – Coding of sub field SSAP in LLC frame . 105
Table 75 – B-Node ACK 251 message . 106
Table 76 – Authenticated B-Node ACK 241 message . 106
Table 77 – B-Node NACK 249 message . 106
Table 78 – Authenticated B-Node NACK 239 message . 107
Table 79 – Coding of field Value in B-Node Nack messages . 107

Table 80 – Relationship between Message Code, Prot and Action fields . 110
Table 81 – General description of a message using SMITP references . 110
Table 82 – TB Message example 1 . 111
Table 83 – PLC translation of previous TB message . 111
Table 84 – TB Message example 2 . 111
Table 85 – PLC translation of previous TB message . 111
Table 86 – TB application messages in telecommunication public network . 111
Table 87 – TB Write.Req 004 message (single programming of one parameter) . 116
Table 88 – TB Write.Req 004 message (single programming of more parameters) . 116
Table 89 – TB Sinc.Req 034 message . 117
Table 90 – TB WriteTab.Req 010 message . 118
Table 91 – TB SetTab.Req 014 message . 119
Table 92 – TB ResetTab 016 message . 119
Table 93 – TB GetTab.Req 030 message . 120
Table 94 – TB GetTab.Resp 031 message . 121
Table 95 – TB Read.Req 002 message . 121
Table 96 – TB Read.Resp 003 message . 122
Table 97 – TB ReadTab.Req 006 message . 123
Table 98 – TB ReadTab.Resp 007 message . 123
Table 99 – TB ReadTab.Req 008 message (entire table) . 124
Table 100 – TB ReadTab.Resp 009 message (entire table) . 124
Table 101 – TB Command 018 message . 125

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Foreword
This document (CLC/TS 50568-8:2015) has been prepared by CLC/TC 13, "Electrical energy measurement
and control".
The following date is fixed:
• latest date by which the existence of (doa) 2015-07-24
this document has to be announced
at national level
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.

This document has been prepared under a mandate given to CENELEC by the European Commission and
the European Free Trade Association.
The European Committee for Electrotechnical Standardization (CENELEC) draws attention to the fact
that it is claimed that compliance with this International Standard may involve the use of a
maintenance service concerning the stack of protocols on which the present Technical Specification
CLC/TS 50568 is based.
The CENELEC takes no position concerning the evidence, validity and scope of this maintenance
service.
The provider of the maintenance service has assured the CENELEC that he is willing to provide
services under reasonable and non-discriminatory terms and conditions for applicants throughout the
world. In this respect, the statement of the provider of the maintenance service is registered with the
CENELEC. Information may be obtained from:
Meters and More Open Technologies
Brussels/Belgium
www.metersandmore.eu
Introduction
This Technical Specification is based on the results of the European OPEN Meter project, Topic
Energy 2008.7.1.1, Project no.: 226369, www.openmeter.com.

- 11 - CLC/TS 50568-8:2015
1 Scope
This Technical Specification contains 4 profile specifications
• the DLMS/COSEM SMITP B-PSK PLC Profile (clause 4)
• the Original-SMITP B-PSK PLC Profile (clause 5)
• the Original-SMITP IP Profile (clause 6)
• the Original-SMITP Local data exchange profile (clause 7)
The DLMS/COSEM SMITP B-PSK profile (see Clause 4) defines the use of the CLC/TS 50568-4
communication protocol and methods to access and exchange data modelled by the COSEM objects
of EN 62056-6-2 via the EN 62056-5-3 application layer. This clause is in line with the DLMS/COSEM
suite as described in EN 62056-1-0.
The Original-SMITP Profiles (Clauses 5, 6 and 7) define the use of the CLC/TS 50568-4
communication protocol and methods to access and exchange data modelled by the Original-SMITP
Data Model (clause 10) via the Original-SMITP Application Layer (Clause 9). These clauses are not
part of the DLMS/COSEM suite as described EN 62056-1-0.
NOTE The expression Original-SMITP refers to the open Smart Metering Information and Telecommunication Protocol
originally developed and maintained by the Meters and More Association (see Foreword). The Original SMITP specifications
were developed prior to the availability of the DLMS/COSEM SMITP B-PSK profile.

Figure 1 – Document structure of CLC/TS 50568-8

2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
CLC/TS 50568-4:2015, Electricity metering data exchange — The Smart Metering Information and
Telecommunication Protocols (SMITP) suite — Part 4: Physical layer based on B-PSK modulation +
Data Link Layer
EN 62056-21, Electricity metering — Data exchange for meter reading, tariff and load control —
Direct local data exchange (IEC 62056-21)
EN 62056-42, Electricity metering — Data exchange for meter reading, tariff and load control — Part
42: Physical layer services and procedures for connection-oriented asynchronous data exchange
(IEC 62056-42)
EN 62056-5-3, Electricity metering data exchange – The DLMS/COSEM Suite - Part 5-3:
DLMS/COSEM application layer (IEC 62056-5-3)
EN 62056-6-2, Electricity metering data exchange – The DLMS/COSEM Suite - Part 6-2: COSEM
Interface classes (IEC 62056-6-2)
SP 800-38A, Morris Dworkin, Recommendation for Block Cipher Modes of Operation - Methods and
Techniques, December 2001
NIST SP 800-38B, Morris Dworkin, Recommendation for Block Cipher Modes of Operation: The
CMAC Mode for Authentication, May 2005
ISO 1745, Information processing — Basic mode control procedures for data communication systems
ISO 1177, Information processing — Character structure for start/stop and synchronous character
oriented transmission
ISO 7498, Information processing systems — Open systems interconnection — Basic reference
model
- 13 - CLC/TS 50568-8:2015
3 Acronyms and abbreviations, terms, definitions and notations
3.1 Acronyms and abbreviations
For the purpose of this document, the following acronyms and abbreviations apply.
AA: Application Association
ACA: Absolute Communication Address
ACK: Acknowledgement
AES: Advanced Encryption Standard
AES-CMAC: Advanced Encryption Standard – Cipher-based Message Authentication Code
AES-CTR: Advanced Encryption Standard – Counter Mode Encryption
AES-ECB: Advanced Encryption Standard – Electronic Codebook
AL:  Application Layer
AMM: Automatic Metering Management
AP: Application Process
APDU: Application Protocol Data Unit
ATTR: Attribute of SMITP message
AV: Any Value
A-XDR: Adapted eXtended Data Representation
bcd: Binary Coded Decimal
B-PSK: Binary Phase Shift Keying
CF: Control Function
COSEM: Companion Specification for Energy Metering
CT: Current Transformer
DCS: Digital Cross-connect System
DLMS: Device Language Messaging Specification
DM: Data Model
DSAP: Destination Service Access Point
DST: Daylight Saving Time
GPRS: General Packet Radio Service
GSM: Group Special Mobile
HES: Head End System
HHU: Hand Held Unit
IC:  Interface Class
IP:  Internet Protocol
Len: Length (in bytes)
LLC: Logical Link Control
LMON: Last Message Order Number
ECTL: Link Service Access Point
LSb: Least Significant bit
LSB: Least Significant Byte
LV:  Low Voltage
MAC: Media Access Control
MBZ: Must Be Zero
MDF:  More Data Follow
MU: Measurement Unit
NA: Not Applicable
NACK: Negative Acknowledgement
NNAP: Neighbourhood Network Access Point
NN: Neighbourhood Networks
NTW: Network
OBIS: Object Identification System
OPA: Optical Powerline Access
PLC: Power Line Carrier
PQ: Power Quality
RES: Reserved
RTC: Real Time Clock
SAP: Service Access Point
SCA: Section Communication Address
SEQ:  Sequence
SSAP: Source Service Access Point
STD: Standard Time
TB:  Tele-management from AMM system
TCP: Transmission Control Protocol
TCR:  Silencing level threshold
TCT:  Silencing level parameter
TMAC: Truncated MAC
ULP: Upper Layer Protocol
UMTS: Universal Mobile Telecommunications System
WAN: Wide Area Network
3.2 Terms and definitions
For the purpose of this document the following terms and defintions apply:
3.2.1
concentrator section
identification code of the network managed by the concentrator
3.2.2
node subsection
identification code of the sub network within the network identified by concentrator section
3.2.3
node progressive
unique node ID within the node subsection

- 15 - CLC/TS 50568-8:2015
3.3 Notations
For the purpose of this document the following notations apply:
– 1 byte = 8 bits;
– fields and bytes naming: capital alphanumeric characters;
– transmission bit order of byte/field relative to the representative mode: first right bit = first
transmitted bit;
– transmission bit order of byte/field relative to their weight: least significant bit = first transmitted
bit.
4 The DLMS/COSEM SMITP B-PSK PLC profile
4.1 Structure of the profile
The reference model of the DLMS/COSEM SMITP B-PSK PLC communication profile is shown in
figure below. It is based on a simplified – or collapsed – three layer OSI architecture. The layers are
the physical layer, the data link layer, the convergence layer and the application layer. The data link
layer is split into the MAC sub layer and the LLC sub layer.

Figure 2 – The DLMS/COSEM SMITP B-PSK PLC communication profile
4.2 Physical layer
The Physical layer provides the interface between the equipment and the physical transmission
medium, that is the distribution network. It transports binary information from the source to the
destination.
The Physical Layer is specified in CLC/TS 50568-4:2015, Clause 7. It provides to the MAC sub-layer
P_DATA services to transfer MPDUs to a peer MAC sub layer entity(ies) using the distributio
...