IEC TS 62657-2:2011
(Main)Industrial communication networks - Wireless communication network - Part 2: Coexistence management
Industrial communication networks - Wireless communication network - Part 2: Coexistence management
IEC/TS 62657-2:2011(E) specifies the fundamental assumptions, concepts, parameters, and procedure for wireless communication coexistence. It provides guidelines, requirements, and best practices for wireless communications' availability and performance, covering the life cycle of wireless communication coexistence to help the work of all persons involved with the relevant responsibilities to cope with the critical aspects in each phase of wireless communication coexistence management in an automation plant. Additionally it provides a common point of reference for wireless communication coexistence for industrial automation sites as a homogeneous guideline to help the users assess and gauge their plant efforts. Life cycle aspects include: planning, designing, installation, implementation, operation, maintenance, administration and training.
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IEC/TS 62657-2
®
Edition 1.0 2011-11
TECHNICAL
SPECIFICATION
colour
inside
Industrial communication networks – Wireless communication network –
Part 2: Coexistence management
IEC/TS 62657-2:2011(E)
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IEC/TS 62657-2
®
Edition 1.0 2011-11
TECHNICAL
SPECIFICATION
colour
inside
Industrial communication networks – Wireless communication network –
Part 2: Coexistence management
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XB
ICS 25.040; 35.100 ISBN 978-2-88912-782-5
® Registered trademark of the International Electrotechnical Commission
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– 2 – TS 62657-2 IEC:2011(E)
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions, abbreviated terms and conventions . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 15
3.3 Conventions . 16
4 Coexistence concept in industrial automation . 16
4.1 Overview . 16
4.2 Objective . 17
4.3 Necessity to implement a coexistence management . 19
4.4 Interference potential . 21
4.5 Ancillary conditions . 23
4.6 Best practices to achieve coexistence . 23
4.7 Coexistence conceptual model . 25
4.8 Coexistence management and selection of a wireless communication
solution . 26
4.9 Coexistence management system . 27
5 Coexistence management parameters . 28
5.1 General . 28
5.2 Explanation of coexistence parameters . 28
5.2.1 Adjacent channel selectivity . 28
5.2.2 Antenna gain . 28
5.2.3 Antenna radiation pattern . 28
5.2.4 Bandwidth . 28
5.2.5 Bit rate of physical link . 29
5.2.6 Centre frequency . 29
5.2.7 Characteristic of the area of operation . 29
5.2.8 Communication load . 29
5.2.9 Cut-off frequency . 30
5.2.10 Data throughput . 31
5.2.11 Duty cycle . 31
5.2.12 Effective radiated power (EIRP, ERP) . 32
5.2.13 Frequency hopping procedure . 33
5.2.14 Future expansion plan . 33
5.2.15 Geographical dimension of the plant . 33
5.2.16 Infrastructure components . 33
5.2.17 Initiation of data transmission . 33
5.2.18 Length of user data per transmission interval . 33
5.2.19 Limitation from neighbors of the plant . 33
5.2.20 Maximum dwell time . 33
5.2.21 Maximum number of retransmissions . 34
5.2.22 Maximum transmitter sequence . 34
5.2.23 Mechanisms for adaptivity . 35
5.2.24 Medium access control mechanism. 35
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TS 62657-2 IEC:2011(E) – 3 –
5.2.25 Modulation . 36
5.2.26 Natural environmental conditions . 36
5.2.27 Organisational parameters . 36
5.2.28 Other frequency users . 36
5.2.29 Packet loss rate (PLR) . 36
5.2.30 Physical links . 36
5.2.31 Positions of wireless devices and distances between them . 37
5.2.32 Power spectral density (PSD) . 37
5.2.33 Purpose of the automation application . 38
5.2.34 Radio channel . 38
5.2.35 Radio propagation conditions . 38
5.2.36 Receiver blocking . 38
5.2.37 Receiver maximum input level . 39
5.2.38 Receiver sensitivity. 39
5.2.39 Regional radio regulations . 39
5.2.40 Relative movement . 39
5.2.41 Reliability required . 39
5.2.42 Response time . 39
5.2.43 Security level required . 40
5.2.44 Spatial coverage of the wireless communication network . 40
5.2.45 Spurious response . 40
5.2.46 Topology . 40
5.2.47 Total radiated power (TRP). 40
5.2.48 Transmission gap . 40
5.2.49 Transmission interval . 41
5.2.50 Transmission time . 42
5.2.51 Transmitter spectral mask . 44
5.2.52 Type of antenna . 45
5.2.53 Update time . 45
5.2.54 Used frequency bands . 46
5.2.55 Wireless devices . 46
5.2.56 Wireless networks . 46
5.2.57 Wireless technology or standard . 46
6 Coexistence management information structures . 47
6.1 General . 47
6.2 General plant characteristic . 47
6.3 Application communication requirements . 48
6.3.1 Overview . 48
6.3.2 Requirements influencing the characteristic of wireless solutions . 49
6.3.3 Performance requirements . 49
6.4 Characteristic of wireless communication system and device type . 50
6.4.1 Overview . 50
6.4.2 Characteristic of wireless communication system type . 50
6.4.3 Characteristic of wireless devices type . 51
6.5 Characteristic of wireless communication solution . 53
6.5.1 Overview . 53
6.5.2 Wireless network solution . 54
6.5.3 Wireless devices solution . 54
7 Coexistence management process . 55
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– 4 – TS 62657-2 IEC:2011(E)
7.1 General . 55
7.1.1 Overview . 55
7.1.2 Suitable documentation method . 56
7.1.3 Documentation . 56
7.1.4 Application of tools . 56
7.2 Establishment of a coexistence management system . 56
7.2.1 Nomination of a coexistence manager . 56
7.2.2 Responsibility of a coexistence manager . 57
7.2.3 Support by radio experts. 57
7.2.4 Training . 57
7.3 Maintaining coexistence management system . 58
7.4 Phases . 58
7.4.1 Investigation phase . 58
7.4.2 Practical tips to accomplish an investigation . 58
7.4.3 Planning phase . 61
7.4.4 Implementation phase . 63
7.4.5 Operation phase . 64
8 Coexistence parameter templates. 65
Bibliography . 69
Figure 1 – Area of consideration . 19
Figure 2 – Examples of wireless equipment in industrial environments . 20
Figure 3 – Progression of expense to achieve coexistence corresponding to the
application classes . 23
Figure 4 – Separation of wireless communication systems according to frequency and
time . 24
Figure 5 – Coexistence conceptual model . 26
Figure 6 – Selection of a wireless communication system and coexistence
management process . 27
Figure 7 – Communication load in case of two wireless devices . 29
Figure 8 – Communication load in the case of several wireless devices . 30
Figure 9 – Cut-off frequencies derived from maximum power level . 31
Figure 10 – Duty cycle . 32
Figure 11 – Maximum dwell time . 34
Figure 12 – Maximum transmitter sequence . 35
Figure 13 – Distance of the radio components . 37
Figure 14 – Power spectral density of an IEEE 802.15.4 system . 38
Figure 15 – Minimum transmitter gap . 41
Figure 16 – Communication cycle, transmission interval and production cycle . 42
Figure 17 – Example of the density functions of transmission delay . 43
Figure 18 – Example of the distribution functions of transmission time . 44
Figure 19 – Transmitter spectral mask of an IEEE 802.15.4 system . 45
Figure 20 – Example of distribution functions of the update time . 46
Figure 21 – Principle for use of coexistence parameters . 47
Figure 22 – Parameters to describe the general plant characteristic . 48
Figure 23 – Parameters to describe automation communication requirements. 49
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TS 62657-2 IEC:2011(E) – 5 –
Figure 24 – Parameters to describe network and device type . 50
Figure 25 – Power spectral density and transmitter spectral mask of a DECT system . 52
Figure 26 – Medium utilization in time of a DECT system . 52
Figure 27 – Parameters to describe network and device type . 54
Figure 28 – Planning of a wireless communication system in the coexistence
management process . 62
Figure 29 – Planning of a wireless communication system in the coexistence
management process . 65
Table 1 – Application communication requirements and profiles. 18
Table 2 – Application profile dependent observation time values . 32
Table 3 – List of parameters used to describe the general plant characteristic . 48
Table 4 – List of parameters used to describe the requirements influencing the
characteristic of wireless solutions . 49
Table 5 – List of parameters used to describe the performance requirements . 50
Table 6 – List of parameters used to describe the wireless communication system type . 51
Table 7 – List of parameters used to describe the transmitter of a wireless device type . 53
Table 8 – List of parameters used to describe the receiver of a wireless device type . 53
Table 9 – List of parameters used to describe the wireless network solution . 54
Table 10 – List of parameters used to describe the transmitter of a wireless device
solution . 55
Table 11 – List of parameters used to describe the receiver of a wireless device
solution . 55
Table 12 – Template to describe the general plant characteristic . 66
Table 13 – Template to describe the automation communication requirements . 66
Table 14 – Template used to describe the wireless communication system type . 67
Table 15 – Template used to describe a wireless device type . 67
Table 16 – Template used to describe the wireless network solution . 68
Table 17 – Template used to describe a wireless device solution . 68
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– 6 – TS 62657-2 IEC:2011(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
WIRELESS COMMUNICATION NETWORK –
Part 2: Coexistence management
FOREWORD
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Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 62657-2, which is a technical specification, has been prepared by subcommittee 65C:
Industrial networks, of IEC technical committee 65: Industrial-process measurement, control
and automation.
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TS 62657-2 IEC:2011(E) – 7 –
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
65C/645/DTS 65C/661A/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 62657 series, under the general title Industrial networks –
Wireless communication network, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
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– 8 – TS 62657-2 IEC:2011(E)
INTRODUCTION
The market is in need of several network solutions, each with different performance
characteristics and functional capabilities, matching diverse application requirements.
Industrial automation applications covering different industrial applications such as process
automation, factory automation, water/waste water treatments and other industrial
applications up to power generation and power distributions applications, require different
behaviours of wireless networks as, for example, in telecommunications, or for commercial
items such as remote controls or toys. These requirements will be specified in the future
IEC 62657-1.
In industrial premises, a lot of different wireless communication networks have to operate
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1 2 3
together such as IEC 62591 [9] (WirelessHART ) and future IEC 62601[10] (WIA-PA), both
using IEEE 802.15.4 for the process applications and such as IEC 61784-1 [5] and
IEC 61784-2 [6] CPs using IEEE 802.11 [12] and IEEE 802.15.1 [13] for factory automation
applications with different wireless communication systems. Different to wired fieldbuses,
wireless communication interfaces can interfere with others on the same premises or in the
same environment, disturbing each other. Therefore, it is not tolerable to have multiple
wireless communication networks in the same facility or environment without a predictable
assuredness of coexistence.
The IEC 62657 series has two parts:
− Part 1: Wireless communication requirements and spectrum considerations
− Part 2: Coexistence management
Future IEC 62657-1 [11] provides requirements for regulators in order to obtain additional
dedicated and wor
...
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