IEC_61588ed1.0en.pdf

INTERNATIONAL STANDARD IEC61588 First edition2004-09 IEEE 1588Precision clock synchronization protocol for networked measurement and control systems Reference number IEC 61588(E):2004 IEEE Std.1588(E):2002 Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editions The IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2.Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating to this publication,including its validity,is available in the IEC Catalogue of publications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication,as well as the list of publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publications The on-line catalogue on the IEC web site(www.iec.ch/searchpub)enables you to search by a variety of criteria including text searches,technical committees and date of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/justpub)is also available by email.Please contact the Customer Service Centre(see below)for further information.Customer Service Centre If you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.ch Tel:+41 22 919 02 11 Fax:+41 22 919 03 00 Precision clock synchronization protocol for networked measurement and control systems INTERNATIONAL STANDARD IEC61588 First edition2004-09 IEEE 1588Commission Electrotechnique InternationaleInternational Electrotechnical Commission Copyright IEEE 2004 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.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 publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch The Institute of Electrical and Electronics Engineers,Inc,3 Park Avenue,New York,NY 10016-5997,USATelephone:+1 732 562 3800 Telefax:+1 732 562 1571 E-mail:stds-infoieee.org Web:www.standards.ieee.org vi Copyright 2002 IEEE.All rights reserved.1.Overview.81.1 Scope.91.2 Purpose.92.References.93.Definitions.10 4.Conventions.12 4.1 Descriptive syntax.124.2 Word usage.124.3 Behavioral specification notation.135.Datatypes in a PTP system.155.1 Primitive datatypes.155.2 Derived datatypes.166.PTP Clock synchronization model.176.1 Overview.176.2 PTP systems.217.PTP protocol specification.337.1 Protocol model of a clock.337.2 Protocol model of a subdomain of PTP clocks.357.3 State behavior of clocks.387.4 Clock data set.427.5 Messaging and internal event behavior of clocks.547.6 Best master clock algorithm.717.7 Clock variance computation.837.8 Local clock synchronization.867.9 Values for system and clock constants.897.10 Physical requirements for PTP implementations.917.11 PTP timing and event ordering constraints.917.12 Management message semantics.958.PTP inter-clock message formats.958.1 Inter-clock messages.1028.2 PTP message header specification.1028.3 Sync and Delay_Req messages.1058.4 Follow_Up messages.1098.5 Delay_Resp messages.1108.6 Management messages.111CONTENTSForeword.4IEEE introduction.7IEC 61588:2004(E)IEEE 1588-2002(E)2 Published by IEC under licence from IEEE.2004 IEEE.All rights reserved.Copyright 2002 IEEE.All rights reserved.vii9.Conformance.1209.1 Conformance objective.1209.2 PTP node conformance requirements.1219.3 PTP system conformance requirements.121Annex A(informative)Using the PTP protocol.122Annex B(informative)Time scales and epochs in PTP.128Annex C(normative)subdomain_name to subdomain_address mapping algorithm.133Annex D(normative)Ethernet implementation of PTP.135Annex E(informative)Bibliography.152IEC 61588:2004(E)IEEE 1588-2002(E)3 Published by IEC under licence from IEEE.2004 IEEE.All rights reserved.Annex F(informative)List of Participants.153Published by IEC under licence from IEEE.2004 IEEE.All rights reserved.INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PRECISION CLOCK SYNCHRONIZATION PROTOCOL FOR NETWORKED MEASUREMENT AND CONT