IEC 62657-4:2025

IEC 62657-4 ®
Edition 2.0 2025-02
REDLINE VERSION
INTERNATIONAL
STANDARD
Industrial networks – Coexistence of wireless systems –
Part 4: Coexistence management with central coordination of wireless
applications
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IEC 62657-4 ®
Edition 2.0 2025-02
REDLINE VERSION
INTERNATIONAL
STANDARD
Industrial networks – Coexistence of wireless systems –
Part 4: Coexistence management with central coordination of wireless
applications
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.040 ISBN 978-2-8327-0229-1

– 2 – IEC 62657-4:2025 RLV © IEC 2025
CONTENTS
FOREWORD . 9
INTRODUCTION . 2
1 Scope . 12
2 Normative references . 12
3 Terms, definitions, abbreviated terms and conventions . 13
3.1 General . 13
3.2 Terms and definitions specific for this document . 13
3.3 Additional terms and definitions for the templates . 14
3.4 Terms and definitions given in IEC 62657-2 . 17
3.5 SRF specific definitions. 18
3.6 Abbreviated terms . 18
3.7 Conventions used for service descriptions . 19
4 Area of consideration . 20
4.1 Coexistence conceptual model . 20
4.2 Investigation of coexistence state . 21
4.3 Implementing radio resources and their utilization . 24
4.4 Coexistence management equipment . 25
5 Wireless coexistence management system architecture . 25
5.1 General . 25
5.2 System elements . 30
5.2.1 Wireless systems and wireless devices for automation applications . 30
5.2.2 Central coordination point . 32
5.2.3 Coordination database . 35
5.2.4 Spectrum sensing system . 36
5.3 Protocol reference architecture . 37
5.3.1 General . 37
5.3.2 Data plane . 38
5.3.3 Management and control plane . 39
5.4 System of wireless communication applications . 40
5.4.1 CCP concept for sharing with incumbent radio systems . 40
5.4.2 Protection of incumbent radio systems . 40
5.4.3 CCP concept for intra-system coexistence . 40
5.5 Interfaces . 42
5.5.1 CCP . 42
5.5.2 CCP managed wireless communication application and wireless device . 43
5.5.3 Database . 43
5.5.4 Spectrum sensing system . 43
6 Parameter for coexistence assessment . 43
7 Parameter for coexistence control . 44
7.1 General . 44
7.2 Application parameter . 44
7.3 Radio parameter . 44
8 Management and control services . 46
8.1 General . 46
8.2 Application communication requirements management services. 46
8.2.1 Supported services . 46

8.2.2 GetGeneralPlantCharacteristic . 47
8.2.3 SetGeneralPlantCharacteristic . 51
8.2.4 GetApplicationCommunicationRequirements . 55
8.2.5 GetApplicationCommunicationStatus . 58
8.2.6 SetApplicationCommunicationReport . 61
8.2.7 NotificationApplicationCommunicationstatus . 64
8.3 Wireless communication system and device subscription services . 67
8.3.1 Supported services . 67
8.3.2 SubscribeDevice . 67
8.3.3 UnsubscribeDevice . 71
8.3.4 SubscribeSystem . 74
8.3.5 UnsubscribeSystem . 77
8.3.6 GetDeviceAttributes . 79
8.4 Wireless communication system and device configuration and control
services . 84
8.4.1 Supported services . 84
8.4.2 SetTransmitPower . 85
8.4.3 SetFrequencyChannel . 87
8.4.4 SetBandwidth . 90
8.4.5 SetFrequencyHoppingSequence . 92
8.4.6 SetBlockedFrequencyList . 95
8.4.7 SetDwellTime . 97
8.4.8 SetMediumAccessControlMechanism . 100
8.4.9 SetDeviceStatus . 102
8.4.10 GetParameter . 105
8.4.11 SetParameter . 108
8.5 Medium resource management services . 112
8.5.1 Supported services . 112
8.5.2 GetMediumResourceReport . 112
8.5.3 SetMediumResourceReport . 116
8.5.4 NotifyMediumResource . 120
8.5.5 SetMediumSensingReport . 124
8.5.6 NotifyMediumSensingResults . 128
8.6 Database access services . 131
8.6.1 Supported service . 131
8.6.2 GetRadioRegulation . 131
Annex A (informative) Example of a CCP controlled WCA and incumbent
services/applications within the 5,8 GHz band . 136
Annex B (informative) Use of IEC CDD . 138
Annex C (informative) Mapping of the services to templates . 140
C.1 General . 140
C.2 Templates of the management services . 140
C.3 Templates of the subscription services. 142
C.4 Templates of the Wireless communication system and device configuration
and control services . 146
C.5 Templates of the Medium resource management services . 149
C.6 Templates of the Database access services . 151
Annex D (informative) Wireless coexistence management with SRF Wireless Platform . 153
D.1 General . 153

– 4 – IEC 62657-4:2025 RLV © IEC 2025
D.2 Overview of SRF Wireless Platform . 153
D.3 Effects of SRF Wireless Platform implementation . 156
D.4 Functions of SRF Wireless Platform . 158
D.4.1 Messages . 158
D.4.2 Functions . 162
D.4.3 Parameters . 180
D.4.4 Message format . 183
Bibliography . 186

Figure 1 – Wireless coexistence conceptual model according to IEC 62657-2 . 21
Figure 2 – Sources to determine parameters for coexistence state calculation . 22
Figure 3 – Coexistence state function . 24
Figure 4 – Parameters describing active influences and control parameters used to

manage coexistence . 25
Figure 5 – Example instance of class CoexistenceSystem in accordance with
IEC 62657-3 . 27
Figure 6 – Elements of central coordinated coexistence management system . 28
Figure 7 – Data exchange in central coordinated coexistence management system . 29
Figure 8 – CCP managed wireless devices and CCP managed wireless systems . 32
Figure 9 – Overview of CCP . 33
Figure 10 – Protocol reference model of CCP managed wireless device . 38
Figure 11 – CCP for intra-system coexistence. 42
Figure 12 – Primitive flow of GetGeneralPlantCharacteristic . 47
Figure 13 – Sequence diagram (GetGeneralPlantCharacteristic) . 49
Figure 14 – Primitive flow of SetGeneralPlantCharacteristic . 51
Figure 15 – Sequence diagram (SetGeneralPlantCharacteristic) . 53
Figure 16 – Primitive flow of GetApplicationCommunicationRequirements . 55
Figure 17 – Sequence diagram (GetApplicationCommunicationRequirements) . 57
Figure 18 – Primitive flow of GetApplicationCommunicationStatus . 58
Figure 19 – Sequence diagram (GetApplicationCommunicationStatus) . 60
Figure 20 – Primitive flow of SetApplicationCommunicationReport . 62
Figure 21 – Sequence diagram (SetApplicationCommunicationReport service
parameters) . 63
Figure 22 – Primitive flow of NotificationApplicationCommunicationstatus . 65
Figure 23 – Sequence diagram (NotificationApplicationCommunicationstatus) . 66
Figure 24 – Primitive flow of SubscribeDevice . 68
Figure 25 – Sequence diagram (SubscribeDevice) . 70
Figure 26 – Primitive flow of UnsubscribeDevice . 71
Figure 27 – Sequence diagram (UnsubscribeDevice) . 73
Figure 28 – Primitive flow of SubscribeSystem . 74
Figure 29 – Sequence diagram (SubscribeSystem) . 76
Figure 30 – Primitive flow of UnsubscribeSystem . 77
Figure 31 – Sequence diagram (UnsubscribeSystem) . 78
Figure 32 – Primitive flow of GetDeviceAttributes . 79
Figure 33 – Sequence diagram (GetDeviceAttributes) . 82

Figure 34 – Primitive flow of SetTransmitPower service . 85
Figure 35 – Sequence diagram (SetTransmitPower) . 86
Figure 36 – Primitive flow of SetFrequencyChannel service . 87
Figure 37 – Sequence diagram (SetFrequencyChannel) . 89
Figure 38 – Primitive flow of SetBandwidth service . 90
Figure 39 – Sequence diagram (SetBandwidth) . 91
Figure 40 – Primitive flow of SetFrequencyHoppingSequence service . 92
Figure 41 – Sequence diagram (SetBandwidth) . 94
Figure 42 – Primitive flow of SetBlockedFrequencyList service . 95
Figure 43 – Sequence diagram (SetBlockedFrequencyList). 96
Figure 44 – Primitive flow of SetDwellTime service . 97
Figure 45 – Sequence diagram (SetDwellTime) . 99
Figure 46 – Primitive flow of SetMediumAccessControlMechanism service . 100
Figure 47 – Sequence diagram (SetMediumAccessControlMechanism) . 101
Figure 48 – Primitive flow of SetDeviceStatus service . 103
Figure 49 – Sequence diagram (SetDeviceStatus) . 104
Figure 50 – Primitive flow of GetParameter service for CMWCA . 105
Figure 51 – Primitive flow of GetParameter service for CMWD . 106
Figure 52 – Sequence diagram (GetParameter) . 107
Figure 53 – Primitive flow of SetParameter service for CMWCA . 109
Figure 54 – Primitive flow of SetParameter service for CMWD . 109
Figure 55 – Sequence diagram (SetParameter) . 111
Figure 56 – Primitive flow of GetMediumResourceReport service for CMWCA . 112
Figure 57 – Primitive flow of GetMediumResourceReport service for CMWD . 112
Figure 58 – Sequence diagram (GetMediumResourceReport) . 115
Figure 59 – Primitive flow of SetMediumResourceReport service for CMWCA . 117
Figure 60 – Primitive flow of SetMediumResourceReport service for CMWD . 117
Figure 61 – Sequence diagram (SetMediumResourceReport) . 119
Figure 62 – Primitive flow of NotifyMediumResource service for CMWCA . 121
Figure 63 – Primitive flow of NotifyMediumResource service for CMWD . 121
Figure 64 – Sequence diagram (NotifyMediumResource) . 123
Figure 65 – Primitive flow of SetMediumSensingReport service for SSN . 125
Figure 66 – Primitive flow of SetMediumSensingReport service for SSF in CMWD . 125
Figure 67 – Sequence diagram (SetMediumSensingReport) . 127
Figure 68 – Primitive flow of NotifyMediumSensingResults service for SSN . 129
Figure 69 – Primitive flow of NotifyMediumSensingResults service for SSF in CMWD . 129
Figure 70 – Sequence diagram (NotifyMediumSensingResults) . 130
Figure 71 – Primitive flow of GetRadioRegulation service . 132
Figure 72 – Sequence diagram (GetRadioRegulation) . 134
Figure A.1 – CCP controlled WCA and incumbent services and applications . 136
Figure A.2 – Overview of incumbent service/applications . 137
Figure B.1 – Fostering wireless coexistence management . 139
Figure D.1 – CCP system elements of SRF Wireless Platform . 153

– 6 – IEC 62657-4:2025 RLV © IEC 2025
Figure D.2 – Overview of SRF Wireless Platform . 154
Figure D.3 – Architecture of SRF Wireless Platform . 155
Figure D.4 – Overview of SRF Wireless Platform layer structure . 156
Figure D.5 – Experimental results of the SRF Wireless Platform demonstration (time
variation of transmission time) . 157
Figure D.6 – Experimental results of the SRF Wireless Platform demonstration
(frequency of transmission time) . 158

Table 1 – Explanations of radio channels . 22
Table 2 – Level of effectiveness of wireless automation . 35
Table 3 – List of parameters for coexistence assessment . 43
Table 4 – List of application parameters for coexistence control . 44
Table 5 – List of radio parameters for coexistence control. 45
Table 6 – GetGeneralPlantCharacteristic service parameters. 47
Table 7 – GetGeneralPlantCharacteristic service message format . 50
Table 8 – SetGeneralPlantCharacteristic service parameters . 51
Table 9 – SetGeneralPlantCharacteristic service message format . 54
Table 10 – GetApplicationCommunicationRequirements service parameters . 55
Table 11 – GetApplicationCommunicationRequirements service message format . 58
Table 12 – GetApplicationCommunicationStatus service parameters . 59
Table 13 – GetApplicationCommunicationStatus service message format . 61
Table 14 – SetApplicationCommunicationReport service parameters . 62
Table 15 – SetApplicationCommunicationReport service message format . 64
Table 16 – NotificationApplicationCommunicationstatus service parameters . 65
Table 17 – NotificationApplicationCommunicationstatus service message format . 67
Table 18 – SubscribeDevice service parameters . 68
Table 19 – SubscribeDevice service message format . 70
Table 20 – UnsubscribeDevice service parameters . 71
Table 21 – UnsubscribeDeviceservice message format . 73
Table 22 – SubscribeSystem service parameters . 74
Table 23 – SubscribeSystem service message format . 76
Table 24 – UnsubscribeSystem service parameters . 77
Table 25 – UnsubscribeSystemservice message format . 79
Table 26 – GetDeviceAttributes service parameters . 80
Table 27 – GetDeviceAttributesservice message format . 82
Table 28 – SetTransmitPower service parameter . 85
Table 29 – SetTransmitPowerservice messsage format . 87
Table 30 – SetFrequencyChannel service parameter . 88
Table 31 – SetFrequencyChannel service message format . 89
Table 32 – SetBandwidth service parameter . 90
Table 33 – SetBandwidthservice message format . 92
Table 34 – SetFrequencyHoppingSequence service parameter . 93
Table 35 – SetFrequencyHoppingSequenceservice message format . 94
Table 36 – SetBlockedFrequencyList service parameter . 95

Table 37 – SetBlockedFrequencyListservice message format . 97
Table 38 – SetDwellTime service parameter . 98
Table 39 – SetDwellTimeservice message format . 99
Table 40 – SetMediumAccessControlMechanism service parameter . 100
Table 41 – SetMediumAccessControlMechanism service message format . 102
Table 42 – SetDeviceStatus service parameter . 103
Table 43 – SetDeviceStatusservice message format . 105
Table 44 – GetParameter service parameter . 106
Table 45 – GetParameterservice message format . 108
Table 46 – SetParameter service parameter . 109
Table 47 – SetParameterservice message format . 111
Table 48 – GetMediumResourceReport service parameter . 113
Table 49 – GetMediumResourceReport service message format . 116
Table 50 – SetMediumResourceReport service parameter . 117
Table 51 – SetMediumResourceReport service message format . 120
Table 52 – NotifyMediumResource service parameter . 121
Table 53 – NotifyMediumResourceservice message format . 124
Table 54 – SetMediumSensingReport service parameter . 126
Table 55 – SetMediumSensingReportservice message format . 128
Table 56 – NotifyMediumSensingResults service parameter . 129
Table 57 – NotifyMediumSensingResults service message format . 131
Table 58 – GetRadioRegulation service parameter . 132
Table 59 – GetRadioRegulation service message format . 135
Table A.1 – Incumbent services and applications . 137
Table C.1 – GetGeneralPlantCharacteristic service parameter template . 141
Table C.2 – SetGeneralPlantCharacteristic service parameter template . 142
Table C.3 – GetApplicationCommunicationRequirements service parameter template . 142
Table C.4 – SubscribeDevice service parameter template . 143
Table C.5 – UnsubscribeDevice service parameter template . 143
Table C.6 – SubscribeSystem service parameter template . 144
Table C.7 – UnsubscribeSystem service parameter template . 144
Table C.8 – GetDeviceAttributes service parameter template . 145
Table C.9 – SetTransmitPower service parameter template . 146
Table C.10 – SetFrequencyChannel service parameter template . 146
Table C.11 – SetBandwidth service parameter template . 146
Table C.12 – SetFrequencyHoppingSequence service parameter template . 147
Table C.13 – SetBlockedFrequencyList service parameter template . 147
Table C.14 – SetDwellTime service parameter template . 147
Table C.15 – SetMediumAccessControlMechanism service parameter template. 148
Table C.16 – SetDeviceStatus service parameter template . 148
Table C.17 – GetParameter service parameter template . 148
Table C.18 – SetParameter service parameter template . 149
Table C.19 – GetMediumResourceReport service parameter template . 149

– 8 – IEC 62657-4:2025 RLV © IEC 2025
Table C.20 – SetMediumResourceReport service parameter template . 150
Table C.21 – NotifyMediumResource service parameter template . 150
Table C.22 – SetMediumSensingReport service parameter template . 151
Table C.23 – NotifyMediumSensingResults service parameter template . 151
Table C.24 – GetRadioRegulation service parameter template . 152
Table D.1 – Comparison between IEC 62657-4 and SRF Wireless Platform . 156
Table D.2 – Correspondence list of messages of SRF Wireless Platform and services
in IEC 62657-4 . 159
Table D.3 – Correspondence list of functions of SRF Wireless Platform and

IEC 62657-4 . 163
Table D.4 – Correspondence list of parameters of SRF Wireless Platform and
IEC 62657-4 . 180
Table D.5 – Examples of JSON Format . 183

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL NETWORKS –
COEXISTENCE OF WIRELESS SYSTEMS –

Part 4: Coexistence management with central coordination
of wireless applications
FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
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This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 62657-4:2022. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
– 10 – IEC 62657-4:2025 RLV © IEC 2025
IEC 62657-4 has been prepared by subcommittee 65C: Industrial networks, of IEC technical
committee 65: Industrial-process measurement, control and automation. It is an International
Standard.
This second edition cancels and replaces the first edition published in 2022. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition.
a) The data item (parameter) to be exchanged between CCP and CMWCA and CMWD to
ensure interoperability between CCP providers and device providers.
b) The sequence of services conducted between CCP and CMWCA and CMWD are now
defined. When the CCP providers and the device providers implement similar process,
clearly defined sequence and unified execution specifications ensure interoperability as
expected.
c) The message formats of sequence diagram to be exchanged between CCP and CMWCA
and CMWD are defined. By defining the message formats, the hierarchical structure of each
data (parameter), and implementing the same message format by the CCP provider and the
device provider, enables to exchange data correctly and ensure interoperability.
The text of this International Standard is based on the following documents:
Draft Report on voting
65C/1330/FDIS 65C/1338/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
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/publications.
A list of all parts in the IEC 62657 series, published under the general title Industrial networks
– Coexistence of wireless systems, 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.
INTRODUCTION
The IEC 62657 series provides background, foundations, process and examples to achieve
wireless coexistence. With a coexistence management process according to IEC 62657-2, a
predictable assuredness of coexistence can be achieved for a given spectrum while ensuring
that application requirements continue to be met. The present document provides an automated
coexistence management.
– 12 – IEC 62657-4:2025 RLV © IEC 2025
INDUSTRIAL NETWORKS –
COEXISTENCE OF WIRELESS SYSTEMS –

Part 4: Coexistence management with central coordination
of wireless applications
1 Scope
This part of IEC 62657 specifies a concept and methods for central coordination (CC) of
automation applications using wireless communications to extend the coexistence management
according to IEC 62657-2. It establishes system elements, interfaces and relationships for a
central coordination. Functions, data, and data exchange for assessing and maintaining the
coexistence state are specified.
This document specifies the central coordination point (CCP) approach as one example of the
usage of the formal description given in IEC 62657-3.
This document is applicable to develop, implement, or modify procedures or solutions.
This document provides requirements for automated coexistence management systems.
This document provides requirements for:
– determination of the coexistence state,
– automated coexistence management procedures,
– CC amendments for existing wireless communication solutions,
– CC functions that coordinate legacy and new wireless communication systems,
– CC sequences and message formats for data exchange.
This document is not restricted to a specific radio frequency range nor is it restricted to a specific
wireless communication technology.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes the 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 62657-2:2025, Industrial networks – Coexistence of wireless systems – Part 2: Coexistence
management
IEC 62443 (all parts), Security for industrial automation and control systems
ISO/IEC 10731, Information technology – Open Systems Interconnection – Basic Reference
Model – Conventions for the definition of OSI services
_____________
Under preparation. Stage at the time of publication: IEC/FDIS 62657-2:2024.

IETF RFC 8259, Tim Bray, The JavaScript Object Notation (JSON) Data Interchange Format,
available at RFC 8259 – The JavaScript Object Notation (JSON) Data Interchange Format
(ietf.org) [viewed 2024-09-03]
3 Terms, definitions, abbreviated terms and conventions
3.1 General
For the purposes of this document, the following terms
...