IEC_61588-2021_IEEE_Std_1588.pdf

IEC 61588 Edition 3.0 2021-06 INTERNATIONAL STANDARD Precision Clock Synchronization Protocol for Networked Measurement and Control Systems IEC 61588:2021-06(en)IEEE Std 1588-2019 IEEE Std 1588 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2019 IEEE All rights reserved.IEEE is a registered trademark in the U.S.Patent&Trademark Office,owned by the Institute of Electrical and Electronics Engineers,Inc.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from the IEC Central Office.Any questions about IEEE copyright should be addressed to the IEEE.Enquiries about obtaining additional rights to this publication and other information requests should be addressed to the IEC or your local IEC member National Committee.IEC Central Office Institute of Electrical and Electronics Engineers,Inc.3,rue de Varemb 3 Park Avenue CH-1211 Geneva 20 New York,NY 10016-5997 Switzerland United States of America Tel.:+41 22 919 02 11 stds.infoieee.org infoiec.ch www.ieee.org www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigendum or an amendment might have been published.IEC publications search-webstore.iec.ch/advsearchform The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and once a month by email.IEC Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:salesiec.ch.IEC online collection-oc.iec.ch Discover our powerful search engine and read freely all the publications previews.With a subscription you will always have access to up to date content tailored to your needs.Electropedia-www.electropedia.org The worlds leading online dictionary on electrotechnology,containing more than 22 000 terminological entries in English and French,with equivalent terms in 18 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC 61588 Edition 3.0 2021-06 INTERNATIONAL STANDARD Precision Clock Synchronization Protocol for Networked Measurement and Control Systems INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 25.040.40;35.110;35.240.50 ISBN 978-2-8322-9811-4 Warning!Make sure that you obtained this publication from an authorized distributor.IEEE Std 1588 Registered trademark of the International Electrotechnical Commission IEC 61588:2021 IEEE Std 1588-2019 i Contents 1.Scope.14 2.Normative references.15 3.Definitions,acronyms,and abbreviations.16 3.1 Definitions.16 3.2 Acronyms and abbreviations.24 4.Conventions.26 4.1 Descriptive lexical form syntax.26 4.2 Word usage.27 4.3 Behavioral specification notation.28 5.Data types and on-the-wire formats.30 5.1 General.30 5.2 Primitive data type specifications.30 5.3 Derived data type specifications.31 5.4 On-the-wire formats.35 6.Clock synchronization model.36 6.1 General requirements on implementations.36 6.2 Principal assumptions about the network and implementation recommendations.39 6.3 PTP Networks.39 6.4 PTP message classes.40 6.5 PTP device types.41 6.6 Synchronization overview.53 6.7 PTP communications overview.65 7.Characterization of PTP entities.69 7.1 Domains.69 7.2 Timescales used in PTP.72 7.3 PTP communications.74 7.4 PTP communication media.81 7.5 PTP Ports.84 7.6 PTP Instance characterization.89 7.7 PTP timing characterization.103 8.PTP data sets.105 8.1 General specifications for data set members.105 8.2 Data sets for PTP Instances.113 8.3 Data sets for Transparent Clocks.141 8.4 commonMeanLinkDelayService data sets.144 9.PTP for Ordinary Clocks and Boundary Clocks.144 9.1 General protocol requirements for PTP Ordinary Clocks and Boundary Clocks.144 9.2 State protocol.145 9.3 Best master clock algorithms.154 9.4 Grandmaster PTP Instance timePropertiesDS updates.164 9.5 PTP message processing semantics.166 9.6 Changes in the PTP Instance.182 10.PTP for Transparent Clocks.182 10.1 Requirements for both end-to-end and peer-to-peer Transparent Clocks.182 10.2 End-to-end Transparent Clock requirements.182 10.3 Peer-to-peer Transparent Clock requirements.191 11.Clock offset,path delay,residence time,and asymmetry corrections.195 Published by IEC under licence from IEEE.2019 IEEE.All rights reserved.IEC 61588:2021 ii IEEE Std 1588-2019 11.1 General specific